JP3087512B2 - Operation control device for air conditioner - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an operation control device for an air conditioner having a plurality of refrigerant systems, and more particularly to an operation control measure for each refrigerant system.

[0002]

2. Description of the Related Art Generally, an air conditioner is disclosed in
As disclosed in Japanese Patent No. 76345, a plurality of refrigerant systems each including one outdoor unit and one indoor unit are provided, and a plurality of control systems are provided corresponding to the respective refrigerant systems. There is.

[0003] When the test run switch is turned on, the compressor of the refrigerant system controlled by the control system is driven in each of the control systems, so that the refrigerant circulates and the outdoor system driven by the compressor is driven. The heat exchanger temperature in the indoor unit in the heating operation state connected to the unit increases. Therefore, if the temperature of the heat exchanger in the indoor unit controlled by the control system does not increase, it means that the control system of the refrigerant system does not match, and erroneous wiring of the control system is detected.

[0004]

In the above-described air conditioner, the refrigerant system and the control system are individually configured, and are of a so-called pair type having one outdoor unit and one indoor unit. Therefore, erroneous wiring can be easily detected by performing a test run for each control system. However, in recent years, it has been proposed that one refrigerant system be controlled for each refrigerant system by one control system. At that time, one control system needs to recognize the refrigerant system of each unit, and if the refrigerant system number is manually set by a setting switch for each unit,
Incorrect settings may occur. If this erroneous setting occurs, the air-conditioning capacity at a predetermined location becomes insufficient, or conversely, air-conditioning is performed at an unnecessary portion, and there is a problem that comfortable air-conditioning cannot be performed. In particular, when the refrigerant system is a multi-type having a plurality of indoor units, there are few states in which each indoor unit is air-conditioned for each refrigerant system. Often. However, when one of the indoor units is turned off, the capacity becomes insufficient when the indoor units are individually operated, or a problem occurs that the protection device is activated.

Further, when a plurality of control systems are provided corresponding to a multi-type refrigerant system, if an erroneous wiring of the control system occurs, simply performing a trial run as in the case of a pair type will cause any indoor unit to fail. There is a problem that it is not possible to easily determine whether or not the wiring is incorrect, and when the indoor units are individually operated as described above, the capacity becomes insufficient,
Alternatively, there is a problem that the protection device operates.

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and an object of the present invention is to enable a control corresponding to a refrigerant system to be performed so that a comfortable air-conditioning operation can be performed.

[0007]

Means for Solving the Problems In order to achieve the above object, a means adopted by the present invention is to automatically set a system number of a refrigerant system while detecting a wiring abnormality for each refrigerant system. It is something to do. Specifically, as shown in FIG. 1, the measures taken by the invention according to claim 1 are as follows:
A plurality of refrigerant systems (1a, 1b, ...) having an outdoor unit (2) and an indoor unit (3) are provided, and each of the refrigerant systems (1a, 1b,
), The outdoor control unit (8b) and the indoor control unit (8c) for controlling the outdoor unit (2) and the indoor unit (3) are wired and connected to the outdoor unit (2) and the indoor unit (3).
It is intended for an operation control device of an air conditioner in which one control system (8) for controlling the air conditioner is configured. A setting start means (81) for outputting a setting start signal for setting a system number of the refrigerant system (1a, 1b,...) To the outdoor control unit (8b) is provided. Further, the outdoor control unit (8b) receives its setting start signal from the setting start means (81) and sets its own refrigerant system (1a, 1b,... System number output means (82) for outputting the system number and operation command of the
Operation start means for starting air-conditioning operation in response to the operation instruction of 2)
(83). On the other hand, the indoor control unit
(8c), the outdoor control unit (8b) in the system number output means (82) in the operation command received to determine whether or not the operation state,
Operation determination means that outputs an operation state signal when it is in the operation state
(84), when the operation determining means (84) outputs an operation state signal, a system number storage means for storing the system number output by the system number output means (82) in the outdoor control unit (8b).
(85).

As shown in FIG. 2, the means adopted by the invention according to claim 2 is that a refrigerant system (1a, 1b,...) Having an outdoor unit (2) and an indoor unit (3) is first provided. A plurality of outdoor units (2) for each of the refrigerant systems (1a, 1b,...)
And an outdoor control unit (8b) that controls the indoor unit (3)
And an operation control device of an air conditioner in which one control system (8) for controlling the outdoor unit (2) and the indoor unit (3) is connected by wiring and an indoor control unit (8c). . Each of the refrigerant systems (1a, 1b,...) Is controlled by the outdoor control unit (8b) and the indoor control unit (8c).
) For controlling the air-conditioning operation for each refrigerant system (1a, 1a).
b,...) to execute the air conditioning operation.
An operation command means (86) for outputting an operation command signal for each refrigerant system (1a, 1b,...) is provided in a). Further, when the operation command means (86) outputs the operation command signal to the air conditioning control means (8a), the outdoor unit (2) and the indoor unit (3) of each of the refrigerant systems (1a, 1b,...) It is determined whether or not each of the outdoor units (2) and the indoor unit (3) is in the operating state.
(3) state detection means (87) for outputting an operation state signal for each,
In response to the operation command signal of the operation command means (86) and the operation state signal of the state detection means (87), the operation command means (86) performs an operation command on the refrigerant system (1a, 1b, ...) and detects the state. Means (87)
It is determined whether or not the detected refrigerant system (1a, 1b,...) Of the outdoor unit (2) and the indoor unit (3) matches each other.
A system discriminating means (88) for outputting a normal signal when they match and an abnormal signal when they do not match is provided.

As shown in FIG. 3, the means according to the third aspect of the present invention first comprises a refrigerant system (1a, 1b,...) Having an outdoor unit (2) and a plurality of indoor units (3). ) Are provided, and an outdoor control unit (9G) and an indoor control unit (9N) for controlling the outdoor unit (2) and the indoor unit (3) of each of the refrigerant systems (1a, 1b,...) Are connected by wiring. A control system (9a, 9b) for controlling the operation for each refrigerant system (1a, 1b,...)
b,...) are intended for an operation control device of an air conditioner in which a plurality of b is provided. And the indoor unit (3)
And a refrigerant state detecting means (TH2, TH3) for detecting a refrigerant state in the above and outputting a state signal. Furthermore, the outdoor control unit (9G) and the indoor control unit (9G) and the indoor control unit (9G) so that the outdoor control unit (9G) and the indoor control unit (9N) for each of the control systems (9a, 9b, ...) start operation control for system determination. Unit (9
N) is provided with system operation means (91) for outputting an operation command signal for each control system (9a, 9b, ...). In addition, an operation command signal of the system operation means (91) and the refrigerant state detection means (T
H2, TH3) and the system operation means (91)
It is determined whether or not the refrigerant state of each indoor unit (3) belonging to the control system (9a, 9b,...) To which the operation command has been issued matches the command state of the system operation means (91). ), A system discriminating means (92) for outputting a normal signal when they match each other and an abnormal signal when they do not match is provided.

The means adopted by the invention according to claim 4 is the refrigerant state detection means (T
H2) is configured to detect the heat exchanger temperature in the indoor unit (3), and the system operation means (91) is configured to output a cooling forced thermo-on operation signal. On the other hand, the system determination means (92) outputs a normal signal when the difference between the heat exchanger temperature before the start of the cooling operation and the heat exchanger temperature after the start of the cooling operation is higher than a predetermined temperature, and an abnormal signal when the temperature difference is lower than the predetermined temperature. It is configured to output signals. Further, a means adopted by the invention according to claim 5 is the invention according to claim 3, wherein the refrigerant state detecting means (TH3) is configured to detect a heat exchanger temperature in the indoor unit (3). The operating means (91) is configured to output a heating forced thermo-on operation signal. On the other hand, the system determination means (92) outputs a normal signal when the difference between the heat exchanger temperature before the start of the heating operation and the heat exchanger temperature after the start of the heating operation is higher than a predetermined temperature, and an abnormal signal when the temperature difference is lower than the predetermined temperature. It is configured to output signals. The measures taken by the invention according to claim 6 correspond to the claims 4 or 5 described above.
In the invention, the system determining means (92) determines that the temperature difference between the heat exchanger temperature before the start of operation and the heat exchanger temperature after the start of operation is 5 ° C.
It is configured to output a normal signal when the temperature is larger and an abnormal signal when the temperature is 5 ° C or less. The measures taken by the invention according to claim 7 are as described in claim 3.
In the invention, the refrigerant state detecting means (TH2, TH3) is configured to detect a heat exchanger temperature in the indoor unit (3), and the system operating means (91) is configured to output a blowing operation signal. On the other hand, the system determination means (92), when the difference temperature between the heat exchanger temperature before the start of the blowing operation and the heat exchanger temperature after the start of the blowing operation is equal to or less than a predetermined temperature, a normal signal, the larger than the predetermined temperature Then, an abnormal signal is output. The means implemented by the invention according to claim 8 is the invention according to claim 3, wherein the indoor control unit (9N) has a display unit (9) for performing an abnormality display when an abnormality signal is received from the system determination unit (92). 97) is connected. The means implemented by the invention according to claim 9 is the system according to claim 3, wherein
When (92) outputs an abnormal signal, the abnormal indoor unit (3)
The forced air blowing means (9) outputs a forced air blowing signal to the indoor control unit (9N) of the indoor unit (3) so that the air blowing operation is performed.
3). The means taken by the invention according to claim 10 is the invention according to claim 3, wherein the outdoor control unit (9G) outputs an abnormal signal when the system determination means (92) outputs an abnormal signal. ) Is provided with a number display unit (94) for displaying the number of items. The measures taken by the invention of claim 11 are the same as the above-mentioned invention of claim 3,
The outdoor control unit (9G) is provided with an address display section (95) for displaying the address of the abnormal indoor unit (3) when the system determination means (92) outputs an abnormal signal.

[0011]

According to the first aspect of the present invention,
First, a system number setting start signal is output from the setting start means (81) .For example, a test operation signal is sent from the central control unit that controls each outdoor control unit (8b) and the indoor control unit (8c) to the control system (8). Is transmitted to the outdoor control unit (8b) and the indoor control unit (8c). Subsequently, the test operation signal is received by the system number output means (82) of each outdoor control unit (8b), and the system number of its own refrigerant system (1a, 1b,...) In the order of a unique number set for each outdoor unit. And an operation command. For example, a system number and an operation command are output to the outdoor unit by the collision detection and winning method in the order of the production number. Then, in response to the operation command from the system number output means (82), the operation start means (83) starts air-conditioning operation, for example, heating operation.

After that, the operation command of the system number output means (82) is received by the operation determining means (84) of the indoor control unit (8c), and the indoor unit (3) controlled by its own indoor control unit (8c). Is determined to be in the operating state, and if it is in the operating state, an operating state signal is output. For example, it is determined whether or not the refrigerant temperature on the inlet side of the heat exchanger has become equal to or higher than a predetermined temperature.
Then, the system number storage means (85) receives the operation state signal and stores the system number output by the system number output means (82) in the outdoor control unit (8b). By storing the system number, the outdoor control unit (8b) and the indoor control unit (8c) control the outdoor unit and the indoor unit (3) for each refrigerant system (1a, 1b,...).

In the invention according to claim 2, first, the operation command means (86) outputs an operation command signal, for example, the outdoor control unit (8b) outputs a test operation signal, and the air conditioning control is performed by the test operation signal. Means (8a) is each refrigerant system (1a, 1b,
…)). On the other hand, the test operation signal is received by the state detection means (87) .For example, the state detection means (87) of the indoor control unit (8c) receives the test operation signal to determine whether or not the indoor unit is operating. If it is in the state, an operation state signal is output for each indoor unit (3). Thereafter, the test operation signal of the operation command means (86) and the operation state signal of the state detection means (87) are compared with the system determination means (8
8) received by the operation command means (86)
(1a, 1b,...) And the refrigerant system (1a, 1b,...) Of each indoor unit (3) detected by the state detecting means (87). A normal signal is output, and if not, an abnormal signal is output. When the abnormal signal is output, a mismatch is displayed on a monitor or the like.

In the invention according to claim 3, first, the refrigerant state detecting means (TH2, TH3) detects the refrigerant state in the indoor unit (3) and outputs a state signal. Then, the system operation means (91) controls the outdoor control so that the outdoor control unit (9G) and the indoor control unit (9N) for each control system (9a, 9b, ...) start operation control for system identification. The operation command signal is sent to each control system (9a,
9b, ...). Thereafter, an operation command signal of the system operation means (91) and the refrigerant state detection means (TH
2, TH3) received by the system discriminating means (92), and the control system (9a, 9b,...) Instructed by the system operating means (91) to operate.
The refrigerant status of each indoor unit (3) belonging to
It is determined whether or not it matches the command state of (91), and a normal signal is output for each indoor unit (3) if it matches, and an abnormal signal is output if it does not match. Specifically, in the invention according to claim 4, the refrigerant state detecting means (T
H2) detects the heat exchanger temperature in the indoor unit (3), and the system operating means (91) outputs a cooling forced thermo-on operation signal. Then, the system determination means (92)
The normal signal is output when the difference between the heat exchanger temperature before the start of the cooling operation and the heat exchanger temperature after the start of the cooling operation is higher than a predetermined temperature, and the abnormal signal is output when the temperature difference is equal to or lower than the predetermined temperature. If the difference between the heat exchanger temperature before the start of the operation and the heat exchanger temperature after the start of the operation is greater than 5 ° C., a normal signal is output, and if the difference is 5 ° C. or less, an abnormal signal is output. In the invention according to claim 5, the refrigerant state detecting means (TH3) detects the temperature of the heat exchanger in the indoor unit (3), and the system operating means (91) outputs a heating forced thermo-on operation signal. The system discriminating means (92) outputs a normal signal when the difference between the heat exchanger temperature before the start of the heating operation and the heat exchanger temperature after the start of the heating operation is higher than a predetermined temperature, and an abnormal signal when the temperature difference is lower than the predetermined temperature. Output each signal, that is,
If the difference between the heat exchanger temperature before the start of the operation and the heat exchanger temperature after the start of the operation is greater than 5 ° C., a normal signal is output, and if the difference is 5 ° C. or less, an abnormal signal is output. In the invention according to claim 7, the refrigerant state detecting means (T
H2, TH3) detects the heat exchanger temperature in the indoor unit (3), and the system operation means (91) outputs a blowing operation signal. Then, the system determination means (92) outputs a normal signal when the difference between the heat exchanger temperature before the start of the blowing operation and the heat exchanger temperature after the start of the blowing operation is equal to or lower than a predetermined temperature, and an abnormal signal when the temperature difference exceeds the predetermined temperature. Each signal is output. Further, in the invention according to claim 8, when the system determination means (92) outputs an abnormality signal, an abnormality is displayed on the display unit (97) of the remote control (9R). Then, the abnormal indoor unit (3) performs the air blowing operation by the forced air blowing means (93). In the invention according to claim 10,
When the system determination means (92) outputs an abnormal signal, the abnormal indoor unit is displayed on the number display section (94) of the outdoor control unit (9G).
In the invention according to the eleventh aspect, the address of the abnormal indoor unit (3) is displayed on the address display section (95) of the outdoor control unit (9G).

[0015]

Therefore, according to the first aspect of the present invention,
Each of the above outdoor control units (8b) and indoor control units (8c)
Since the system number of the refrigerant system (1a, 1b,...) Is set to the system number, it is not necessary to manually set the system number of the refrigerant system (1a, 1b,. Therefore, the system number can be set accurately without erroneous setting. As a result, it is possible to reliably prevent insufficient air conditioning at a predetermined location, or conversely, to perform air conditioning at an unnecessary location, thereby enabling comfortable air conditioning and improving workability. And a nonsense claim can be prevented. In particular, when each of the refrigerant systems (1a, 1b,...) Is a multi-type having a plurality of indoor units (3), each indoor unit (3) is
There are few states in which the air-conditioning operation is performed for each (1a, 1b,...), And a predetermined air-conditioning capacity is often exhibited in a normal operation state even when the system number is incorrectly set. However, when one of the indoor units (3) is turned off, or when the indoor units (3) are individually operated, the capacity becomes insufficient.
Alternatively, the protection device is activated, but it is possible to reliably prevent the shortage of these capabilities and the operation of the protection device.

According to the second aspect of the present invention, since the coincidence between the refrigerant system (1a, 1b,...) And the system number of the refrigerant system (1a, 1b,...) Is determined, Since it is possible to reliably detect an incorrect setting of the system number, etc., it is possible to reliably prevent the air conditioning capacity of a predetermined location from being insufficient, or conversely, to perform the air conditioning at an unnecessary location. Air conditioning can be performed.

According to the third aspect of the present invention, the refrigerant system (1a, 1b,...) Is matched with the control system (9a, 9b,...) For each indoor unit (3). First, even in the refrigerant system (1a, 1b,...) Having a plurality of indoor units (3), the indoor unit (3) having the incorrect wiring can be reliably determined. Accordingly, it is possible to prevent the shortage of the air conditioning capacity and the operation of the protection device, and it is possible to perform comfortable air conditioning. In addition, according to the invention according to claim 4, erroneous wiring can be determined in the cooling operation, so that a reliable determination can be made when the outside air temperature is high, and according to the invention according to claim 5, For example, erroneous wiring can be determined in the heating operation, so that a reliable determination can be made when the outside air temperature is low. According to the invention of claim 6, when the temperature difference between the heat exchangers is larger than 5 ° C., the normality is determined, so that the determination with high accuracy can be performed. According to the seventh aspect of the present invention, since incorrect wiring can be determined in the air blowing operation, a reliable determination can be made even if the other refrigerant systems (1a, 1b, ...) are performing the cooling operation or the heating operation. It can be performed.

Further, according to the invention of claim 8, since the abnormality is displayed on the remote controller (9R) of the indoor unit (3) of the incorrect wiring, the indoor unit (3) of the incorrect wiring can be quickly identified. it can. According to the ninth aspect of the present invention, since the indoor fan (F2) of the indoor unit (3) with incorrect wiring is driven,
The indoor unit (3) having the incorrect wiring can be easily identified. Further, according to the invention of claim 10, since the number of erroneously wired indoor units (3) is displayed, maintenance can be performed quickly and easily. Further, according to the invention of claim 11, since the address of the indoor unit (3) of the incorrect wiring is displayed, even if there are many indoor units (3), the indoor unit (3) of the incorrect wiring can be quickly identified. You can tell.

[0019]

Embodiments of the present invention will be described below in detail with reference to the drawings. As shown in FIG. 4, (1) includes a plurality of refrigerant systems (1a, 1b,...).
), The refrigerant system (1a, 1
b,...) represent one outdoor unit (2) as shown in FIG.
And a plurality of indoor units (3) connected in parallel to each other. The outdoor unit (2) includes a compressor (21) whose capacity is adjusted by an inverter or the like, and an oil separator (22) that separates oil from gas refrigerant discharged from the compressor (21).
A four-way switching valve (23) that switches as shown by the solid line in the cooling operation and switches as shown by the broken line in the heating operation, and an outdoor heat exchanger that becomes a condenser during the cooling operation and an evaporator during the heating operation.
(24), an outdoor electric expansion valve (25) that regulates the flow rate of the refrigerant during the cooling operation and performs a throttling action of the refrigerant during the heating operation, a receiver (26) that stores the liquefied refrigerant, and a liquid refrigerant in the suction refrigerant. And an accumulator (27) for removing the water. Then, the compressor (21), the oil separator (22), and the four-way switching valve (23)
And outdoor heat exchanger (24), receiver (26) and accumulator (2
7) is connected to the main pipe (11) so that the refrigerant can flow therethrough, while the outdoor heat exchanger (24) is provided with an outdoor fan (F1). The indoor unit (3) has the same configuration, and includes an indoor heat exchanger (31) that becomes an evaporator during a cooling operation, a condenser during a heating operation, and a liquid refrigerant side of the indoor heat exchanger (31). And an indoor electric expansion valve (32), which adjusts the flow rate of the refrigerant during the heating operation and performs the throttling operation of the refrigerant during the cooling operation, is connected by a refrigerant pipe so that the refrigerant can flow. The indoor unit (3) is connected to a main pipe (11), and the indoor heat exchanger (31) has an indoor fan (F2).
Is provided, the compressor (21), an outdoor heat exchanger (24)
An indoor heat exchanger (31) and the like are connected so that the refrigerant can circulate, and constitute a main refrigerant circuit (12) for releasing heat obtained by heat exchange with outdoor air to indoor air.

An oil return passage (4) is connected between the oil separator (22) and the suction side of the compressor (21), and the oil return passage (4) is connected to the capillary (41). Provided with the above oil separator
It is configured to return the oil from (22) to the compressor (21).

The discharge side of the compressor (21) and the main refrigerant circuit (12)
A heating overload control bypass passage (5), which is connected to the discharge pipe (hot gas) in a bypassable manner, is connected to the liquid pipe side of the outdoor heat exchanger (24). ) And an auxiliary heat exchanger (51) installed in a common air passage, a capillary (52), and an electromagnetic valve (53) that opens when the pressure of the refrigerant is high, are sequentially connected in series, and an outdoor heat exchanger (24) and Connected in parallel with the outdoor electric expansion valve (25), the solenoid valve (53) is opened at all times during the cooling operation, and when the high pressure excessively rises during the heating operation, and a part of the discharge gas is transferred to the main refrigerant. The circuit (12) is bypassed to the heating overload control bypass path (5).
The heating overload control bypass path (5) assists the capacity of the outdoor heat exchanger (24) by condensing a part of the discharge gas in the auxiliary heat exchanger (51) when the high pressure rises excessively. At the same time, the capillary (52) is configured to balance pressure loss on the outdoor heat exchanger (24) side. An equalizing hot gas bypass passage is provided between the discharge side and the suction side of the compressor (21).
(6) is connected, and the pressure equalizing hot gas bypass passage (6) is
The pressure equalizing solenoid valve (61) and the capillary (6
2) is interposed. Between the liquid pipe side of the main refrigerant circuit (12) and the suction side of the compressor (21), a liquid injection bypass path (7) for adjusting the degree of superheat of the suction gas during cooling and heating operation is connected, The bypass passage (7) is provided with an injection solenoid valve (71) that opens and closes in conjunction with turning on and off the compressor (21), and a capillary (72).

In FIG. 5, the refrigerant system (1a, 1
b,…), sensors are arranged, and (TH1) is
Room temperature sensor that detects indoor temperature T1 (suction air temperature)
(TH2) and (TH3) are an indoor liquid temperature sensor and an indoor gas temperature sensor for detecting the refrigerant temperatures T2 and T3 in the liquid and gas side pipes of the indoor heat exchanger (31), respectively, and (TH4) is a compressor. (21) A discharge pipe sensor for detecting the discharge gas temperature T4, (TH5) and (T
H6) is an outdoor liquid temperature sensor and an outdoor gas temperature sensor for detecting the refrigerant temperatures T5 and T6 in the liquid side and gas side pipes of the outdoor heat exchanger (24), respectively. (TH7) is an outdoor heat exchanger (24) An outside air temperature sensor that is arranged at the air suction port and detects the outside air temperature T7,
(P1) is a high-pressure sensor that is disposed in the discharge pipe and detects the high-pressure side pressure Hp to detect the condensing pressure equivalent saturation temperature Tc, and (P2)
This is a low-pressure sensor that is arranged in the suction pipe and detects the low-pressure side pressure Lp to detect the evaporation temperature equivalent saturation temperature Te.

In the above-described refrigerant systems (1a, 1b,...) Of FIG. 5, during the cooling operation, the four-way switching valve (23) switches as shown by the solid line in the drawing, and the refrigerant compressed by the compressor (21). Is an outdoor heat exchanger
After being condensed in (24), it is diverted to each indoor unit (3), decompressed by each indoor electric expansion valve (32), evaporated in each indoor heat exchanger (31), and then compressed in a gaseous state by the compressor ( Cycle back to 21). On the other hand, during the heating operation, the four-way switching valve (23) switches as shown by the broken line in the figure, and the compressed refrigerant branches off to each indoor unit (3) via the four-way switching valve (23), and flows into each indoor unit. Heat exchanger
After being condensed after being subjected to heat exchange in (31), they are merged, decompressed by the outdoor electric expansion valve (25), evaporated in the outdoor heat exchanger (24), and circulated back to the compressor (21). . The compressor (21), the outdoor electric expansion valve (25), the high-pressure sensor (P1), and the like are connected to a controller (8a), and the controller (8a)
Constitute air conditioning control means for controlling the air operation for each refrigerant system (1a, 1b,...). And the above controller
(8a) is the low pressure side pressure detected by the low pressure sensor (P2) during the cooling operation, that is, the evaporation temperature equivalent saturation temperature Te is the high pressure side pressure detected by the high pressure sensor (P1) during the heating operation, that is, the condensation pressure equivalent The capacity of the compressor (21) is controlled so that the saturation temperature Tc converges to a predetermined control target value Tes or Tcs, respectively (Te constant control and Tc constant control). Further, the controller (8a) controls the opening degree of the indoor electric expansion valve (32) so as to maintain the superheat degree Sh at a predetermined target value (for example, 5 ° C.) during the cooling operation (Sh constant control), Supercooling Sc during heating operation
The degree of opening of the indoor electric expansion valve (32) is controlled (Sc constant control) so that (Tc−T2) is maintained at a predetermined target value (for example, 5 ° C.), and the superheat degree Sh (T5−T6) is predetermined. Of the outdoor electric expansion valve (25) is controlled so as to maintain the target value (for example, 5 ° C.). Further, the controller (8a) includes an outdoor control unit (8b) for controlling the outdoor unit (2) and a plurality of indoor control units (8c) for controlling each indoor unit (3).
As shown in FIG. 4, each refrigerant system
The (1a, 1b,...) Outdoor control unit (8b) and the indoor control unit (8c) are connected by wiring to form one control system (8). The control system (8) includes a remote controller (8d) connected to each of the indoor control units (8c).
It has two central control units (8e).

Further, as a feature of the present invention, the centralized control unit (8e) is provided with a test operation switch (81), and the outdoor control unit (8b) is provided with a system number output means (82) and a start-up operation. Means (83), while the indoor control unit (8c) is provided with an operation determining means (84) and a PROM (85), and the control system (8) is connected to the indoor control unit (8c). The system number of the refrigerant system (1a, 1b,...) Is automatically set. The test operation switch (81) constitutes setting start means for outputting a test operation signal as a setting start signal for setting a system number of the refrigerant system (1a, 1b, ...) to the outdoor control unit (8b). ing. The system number output means (82) receives the test operation signal of the test operation switch (81), and the system number of its own refrigerant system (1a, 1b,...) In the order of the unique number for each outdoor unit (2) set in advance. The system is configured to output a serial number and an operation command, and specifically, for example, a serial number signal of a serial number preset for each outdoor unit (2), a system number signal, and a system number setting operation request. And outputs a system number signal and a system number setting operation request signal in the order of the production number according to a collision detection and winning system based on the production number signal. The operation start means (83) is configured to start an air-conditioning operation by a system number setting operation request signal which is an operation command of the system number output means (82), that is, drives the compressor (21). Then, the forced heating thermo-on operation is started. On the other hand, the operation determining means (84) receives the system number setting operation request signal of the system number output means (82) in the outdoor control unit (8b), and determines whether or not the operation is in the operation state. It is configured to output a state signal. Specifically, when the refrigerant temperature T3 of the indoor gas temperature sensor (TH3) becomes equal to or higher than a predetermined temperature, an operation state signal is output. When the operation determining means (84) outputs the operation state signal, the PROM (85) takes in the system number signal output by the system number output means (82) in the outdoor control unit (8b), and outputs the refrigerant system (1a, 1b,...).

Next, the refrigerant system in the above air conditioner
Regarding the operation of setting the system number of (1a, 1b,...), FIGS.
A description will be given based on the control flow of FIG. FIGS. 6 and 7 show the control flow of the outdoor control unit (8b). First, in step ST1, it is determined whether or not a system number setting operation start signal has been received, that is, the central control unit (8e). ), The test operation signal is transmitted from the central control unit (8e) to each of the outdoor control units (8b) and the indoor control units (8c).
Step ST1 until 1) is turned on and the test run signal is received.
When the test run signal is received,
The process moves from ST1 to step ST2. Then, in the step ST2, the system number is cleared and the step ST2 is executed.
3 and the system number output means (82) outputs the system number setting operation request signal together with the serial number signal.
In, it is determined whether a system number setting operation request signal has been received. In this step ST4, the determination is NO until any of the outdoor control units (8b) including itself includes the system number setting operation request signal is output, and
On the other hand, when the system number setting operation request signal is received while returning to ST3, the determination in step ST4 becomes YES and the process proceeds to step ST5. In the step ST5, it is determined whether or not the received serial number matches its own serial number. If they match, the process proceeds from the step ST5 to the step ST6. That is, when the test operation switch (81) is turned on and a test operation signal is output, the all outdoor control unit (8b) outputs a production number signal and a system number setting operation request signal, and this production number signal Any one of the outdoor control units (8b) will output a production number signal and a system number setting operation request signal according to the collision detection and winning method based on, for example, the outdoor control unit (8b) with the smallest production number A production number signal and a system number setting operation request signal will be output.

Thereafter, in step ST6, when the system number to be set is set to its own system number, that is, when the system numbers are set in the order of "1, 2, 3,...", The first outdoor control unit (8b ) Sets its own system number to “1”. Then, the process proceeds from step ST6 to step ST7, wherein the system number output means (82) outputs a system number signal, and based on the system number setting operation request signal of the system number output means (82), the operation start means ( 83) drives the compressor (21) and the like to start the forced heating thermo-on operation, outputs a system number setting operation signal, and outputs a target signal of the condensing pressure equivalent saturation temperature Tc. Subsequently, the process proceeds from step ST7 to step ST8, in which it is determined whether or not the system number setting operation signal has been received. The step ST7 is performed until the system number setting operation signal is output to the control system (8).
On the other hand, when the system number setting operation signal is output to the control system (8) and the system number setting operation signal is received, the determination in the step ST8 becomes YES and the step ST8 is performed.
It will move to ST9. In step ST9, after setting the 5-minute timer TMO, in step ST10, the timer TMO is counted. In step ST11, the target signal of the condensing pressure equivalent saturation temperature Tc is continuously output, and in step ST12, It is determined whether or not the timer TM0 has counted up, and the process returns to the step ST10 until the timer TM0 counts up.
It will move to ST13.

Thereafter, in step ST13, after outputting the system number setting operation end signal, the process proceeds to step ST14, where it is determined whether or not the system number setting operation end signal has been received. While returning to step ST13 until the set operation end signal is output, the control system
When the system number setting operation end signal is output to (8) and the system number setting operation end signal is received, the determination in step ST14 becomes YES and the control operation of one outdoor control unit (8b) ends. become.

If it is determined in step ST5 that the received serial number and the own serial number do not match,
In other words, the outdoor control unit (8b), which was unable to output its own serial number by the collision detection and winning system, determined NO in step ST5 and moved to step ST15, and received the system number setting operation end signal. It is determined whether or not. Until the other outdoor control unit (8b) outputs a system number setting operation end signal, the process proceeds to step ST16, and determines whether or not a system number setting operation signal has been received. ) From step ST16 to step ST5 until a system number setting operation signal is received.On the other hand, when a system number setting operation signal is received from another outdoor control unit (8b), the process proceeds from step ST16 to step ST17.
The system number to be set by itself is set by adding 1 to the received system number, the process returns to step ST5, and the above operation is repeated. Further, in step ST15, when a system number setting operation end signal is received from another outdoor control unit (8b), the determination is YES, the process returns to step ST3, and the above operation is repeated. That is, when one outdoor control unit (8b) finishes the operation of setting the system number and outputs the system number setting operation end signal, the unset outdoor control unit (8b) again issues the serial number signal and the system number setting operation request. The signals are output all at once, and the above operation is repeated, and each outdoor control unit (8b) sequentially performs a system number setting operation. Thereafter, when the production number signal and the system number setting operation request signal are not output from any of the outdoor control units (8b), all the outdoor control units (8b) have finished setting the system number, and the time is up. The setting operation of the all-outdoor control unit (8b) ends.

FIG. 8 shows a control flow of the indoor control unit (8c). First, in step ST21, it is determined whether or not a system number setting operation start signal has been received. When the test operation switch (81) of (8e) is turned on, a test operation signal is also transmitted from the central control unit (8e) to each indoor control unit (8c), so that the test operation switch (81) is turned on and the test operation is performed. The process waits at step ST21 until a signal is received, and upon receiving the test run signal, moves from step ST21 to step ST22. Then, in the step ST22, the system number is cleared, the process proceeds to a step ST23, a 5-minute timer TM1 is set, and the process proceeds to a step ST24, where the timer TM1 is counted and the step ST24 is performed.
The process proceeds to 25, where it is determined whether or not the timer TM1 has counted up. Then, the process proceeds to step ST26 until the timer TM1 counts up. On the other hand, when the timer TM1 times out, the process ends without setting the system number, and an alarm or the like is issued assuming that a setting abnormality or the like has occurred. In step ST26, the outdoor control unit (8b)
It is determined whether or not the system number setting in-operation signal has been received from the controller. Until the system number setting in-operation signal is received, the determination is NO, and the process returns to step ST24. Is received, the determination in step ST26 becomes YES, and the process moves to step ST27. In step ST27, the received system number is set to its own system number, that is, the system number output by the system number output means (82) in FIG. 7 is received and set to its own system number. Thereafter, the process proceeds to step ST28, in which it is determined whether or not a system number setting operation end signal from the outdoor control unit (8b) has been received.When the system number setting operation end signal is received, the currently received system number setting is performed. This means that the outdoor unit has output the current system number.
(2) and the refrigerant system (1a, 1b,...) Are different, and the process returns to step ST23 to repeat the above operation. In step ST28, the determination is NO until the system number setting operation end signal is received, and the process proceeds to step ST29, where the operation determination unit (84) determines whether the refrigerant has passed, and determines whether the refrigerant has passed. Step ST28 above
And the above operation is repeated. When the operation determination means (84) determines that the refrigerant has passed, the operation state signal is output, and the determination in step ST29 is YES, the process proceeds to step ST30, and the system number set in step ST27 is set to the PROM (85). Will be taken and stored as its own system number, and the operation of setting the system number will be terminated.

Next, the determination of the passage of the refrigerant by the operation determining means (84) in step ST29 will be described with reference to the control flows of FIGS. First, in step ST31,
It is determined whether or not the set operation start signal of the system number has been received, that is, whether or not the test operation signal has been received from the central control unit (8e), and until the test operation signal is received,
The process proceeds from step ST31 to step ST32 to determine whether or not the system number has been set.If the system number has been stored in step ST30, the determination in step ST32 becomes YES and the process proceeds to step ST33. , The indoor electric expansion valve (32) and the indoor fan (F2)
It will return to ST31. If the system number is not stored in step ST30, the system number is not set, so the determination in step ST32 is NO and the process proceeds to step ST34, where the indoor electric expansion valve (32) and the indoor The fan (F2) is abnormally stopped, and the process returns to step ST31. On the other hand, in step ST31, when the test operation signal is received from the central control unit (8e), the determination is Y.
ES is reached, the process proceeds to step ST35, a 5-minute timer TM2 is set, the process proceeds to step ST36, the timer TM2 is counted, and the process proceeds to step ST37 to determine whether or not the timer TM2 has counted up. Steps ST37 to ST37 are repeated until the timer TM2 counts up.
Move to 38, determine whether or not the system number setting operation signal from the outdoor control unit (8b) is received, return to step ST39 until the system number setting operation signal is received, and repeat the above-described operation. Will be.

On the other hand, in step ST38, when the system number setting in-operation signal is received, the determination is YES, and
Move to step ST39, fully open the indoor electric expansion valve (32), turn off the indoor fan (F2), move to step ST40, and receive the system number setting operation end signal from the outdoor control unit (8b). If it is determined whether or not the system number setting operation end signal has been received, the setting of one system number has been completed, so the process returns to step ST35, and the above-described operation is repeated. In step ST40, if the system number setting operation end signal is not received, the determination is NO, and the process proceeds to step ST41, where the gas-side refrigerant temperature T3 detected by the indoor gas temperature sensor (TH3) is expressed by the following equation. It is determined whether or not the temperature has become higher than the predetermined temperature T. T = {(Tc−T1) / 2} + T1 When the gas-side refrigerant temperature T3 is equal to or lower than the predetermined temperature T, the process proceeds from step ST41 to step ST42,
It is determined whether or not the gas-side refrigerant temperature T3 is 35 ° C. If the gas-side refrigerant temperature T3 is equal to or lower than 35 ° C, the indoor fan (F
While returning to step ST41 from step ST42 with 2) off, when the gas-side refrigerant temperature T3 becomes higher than 35 ° C., the process proceeds from step ST42 to step ST43, and turns on the indoor fan (F2) to turn on step ST41. Will return to.

On the other hand, if the gas-side refrigerant temperature T3 is higher than the predetermined temperature T in step ST41, the determination is YES.
And proceeds to step ST44, sets the one-minute timer TM3, and proceeds to step ST45. Is determined. When the gas-side refrigerant temperature T3 is equal to or lower than the predetermined temperature T, the process returns from step ST46 to step ST41,
When the gas-side refrigerant temperature T3 becomes higher than 35 ° C., the process moves from step ST46 to step ST47. That is,
In step ST7 in FIG. 7, the outdoor control unit
When the operation start means (83) of (8b) starts the heating operation, the compressor (21) of the outdoor unit (2) is driven and the refrigerant circulates, so that the same refrigerant as the outdoor unit (2) is used. Line (1a,
1b,...), The refrigerant flows through the indoor unit (3), and the gas-side refrigerant temperature T3 becomes higher than the predetermined temperature T.

Therefore, when the gas-side refrigerant temperature T3 is higher than the predetermined temperature T, the steps ST46 to ST
Moving on to step 47, it is determined again whether the gas-side refrigerant temperature T3 is 35 ° C., and if the gas-side refrigerant temperature T3 is 35 ° C. or lower, the above-described step ST47 is performed with the indoor fan (F2) turned off. From step ST49, the gas-side refrigerant temperature T3 is 35 ° C.
If it becomes higher, the process moves from step ST47 to step ST48, turns on the indoor fan (F2), and moves to step ST49. In this step ST49, it is determined whether or not the timer TM3 has timed out.
Returns to step ST45 until the time is up, and when the timer TM3 has timed out, the determination in step ST49 becomes YES and the process moves to step ST50 to determine the passage of the refrigerant. That is, if the gas-side refrigerant temperature T3 is higher than the predetermined temperature T for one minute, the indoor unit (3) belonging to the refrigerant system (1a, 1b,...) Of the system number to be set at present is determined. Become.

Thereafter, from the above-mentioned step ST50 to step ST50
Moving to 51, it is determined whether or not a system number setting operation end signal from the outdoor control unit (8b) is received, and the process returns to step ST50 until the system number setting operation end signal is received, and the system number setting operation ends. When the signal is received, the above step ST
The process moves from step 51 to step ST52, in which the indoor electric expansion valve (32) and the indoor fan (F2) are normally controlled, and the operation for judging the passage of the refrigerant is ended. In step ST38, the gas-side refrigerant temperature T3 is received while the system number setting operation signal is received.
Is equal to or lower than the predetermined temperature T, the operation from step ST41 to step ST46 is repeated. Then, when it is determined in step ST50 that the refrigerant has passed, the determination in step ST29 in FIG. 8 is YES, and the system number is set.
When the operation from step ST46 to step ST46 is repeated, the operation from step ST28 to step ST29 in FIG. 8 is repeated, and the above operation is repeated until it is determined that the refrigerant has passed. As a result, when the system number is received from the outdoor control unit (8b) and the gas-side refrigerant temperature T3 becomes higher than the predetermined temperature T,
The system numbers are stored sequentially. Note that the above steps
When the timer TM2 times out in ST37, it means that the setting of all the system numbers has been completed, and the process proceeds to step ST52.

As described above, each of the refrigerant systems (1a, 1b,...)
), The system number is set in the outdoor control unit (8b) and the indoor control unit (8c), and the outdoor unit (2) and the indoor unit (3) are controlled.For example, as shown in FIG. Thus, the outdoor control unit (8b) and the indoor control unit (8c) belonging to the refrigerant system (1a, 1b,...) Of “1” have the system number of “1” and the refrigerant system of “2” (1a, 1b,. 1a, 1b,
..) Are assigned a system number of “2” for the outdoor control unit (8b) and the indoor control unit (8c).
That is, conventionally, as shown in FIG.
In some cases, the system number “1” is incorrectly set to one of the indoor control units (8c) of the indoor units (3) belonging to the refrigerant system (1a, 1b,...). Also, as shown in FIG. 19, when group control is performed by one remote controller (8d), a system number is set by the remote controller (8d). At this time, similar to the case shown in FIG. , "2" refrigerant system
In some cases, the system number of “1” is incorrectly set to one of the indoor control units (8c) belonging to (1a, 1b,...). Furthermore, as shown in FIG. 20, when controlled by one centralized control unit (8e), the system number is set by the centralized control unit (8e).
As in the case shown in (1), there is a case where the system number of “1” is erroneously set to one of the indoor control units (8c) belonging to the refrigerant system (1a, 1b,...) Of “2”. Therefore, in the present embodiment, the system number is set without such an erroneous setting.

Therefore, according to the present embodiment, the refrigerant system (1) is connected to each of the outdoor control unit (8b) and the indoor control unit (8c).
a, 1b,...), the system number of the refrigerant system (1a, 1b,...) does not need to be manually set, and can be set automatically. The system number can be set accurately without performing. As a result, it is possible to reliably prevent insufficient air conditioning at a predetermined location, or conversely, to perform air conditioning at an unnecessary location, thereby enabling comfortable air conditioning and improving workability. And a nonsense claim can be prevented. In particular, when each refrigerant system (1a, 1b,...) Is a multi-type having a plurality of indoor units (3) as in the above-described embodiment, each indoor unit (3) is
a, 1b,...), the air-conditioning operation is rarely performed, and even when the system number is incorrectly set, a predetermined air-conditioning capacity is often exhibited in a normal operation state. However, when any of the indoor units (3) is turned off, or when the indoor units (3) are individually operated, the capacity becomes insufficient, or the protection device is activated. And the operation of the protection device can be reliably prevented.

FIG. 11 shows a second embodiment of the invention according to claim 2, in which an erroneous setting of the system number is detected. That is, as shown in FIG. 5, a test operation switch (86) is provided, and the indoor control unit (8c) is provided with a state detection means (87) and a system determination means (88). The test run switch (86) is
The controller (8a) serving as the air conditioning control means
(1a, 1b,...) Constitutes operation command means for outputting a test operation signal as an operation command signal for each refrigerant system (1a, 1b,...) To the outdoor control unit (8b) so as to execute the air conditioning operation. ing.

On the other hand, when the test operation switch (86) outputs a test operation signal, the state detecting means (87) outputs the refrigerant system signals.
It is determined whether or not the indoor unit (3) of (1a, 1b,...) Is in the operating state, and if each indoor unit (3) is in the operating state, the operating state signal for each of the indoor units (3) is output. At this time, since the outdoor control unit (8b) outputs a test operation signal, the test operation signal also serves as a state detection signal of the outdoor control unit (8b). Further, the system determination means (88) receives a test operation signal of the test operation switch (86) and an operation state signal of the state detection means (87),
An outdoor unit for which the test operation switch (86) has issued a test operation command.
It is determined whether the refrigerant system (1a, 1b,...) Of (2) matches the refrigerant system (1a, 1b,...) Of each indoor unit (3) detected by the state detection means (87). Then, a normal signal is output when they match, and an abnormal signal is output when they do not match.

Then, the abnormality determination between the refrigerant system (1a, 1b,...) And the controller (8a) in the air conditioner will be described based on the control flow of FIG. This figure 11
Shows a control operation of the state detection means (87) in the indoor control unit (8c), first, in step ST61,
It is determined whether or not the system number setting operation start signal has been received, that is, whether or not a test operation signal has been received from the outdoor control unit (8b), and the process waits in step ST61 until the test operation signal is received. When the test operation signal is received, the determination in step ST61 becomes YES, the process proceeds to step ST62, the indoor electric expansion valve (32) is fully opened, the indoor fan (F2) is turned off, and the process proceeds to step ST63. Become. Then, from step ST63 to step ST72, it operates in the same manner as the above-described refrigerant passage determination shown in FIG. 9 and FIG. 10 (see steps ST41 to ST50), and determines refrigerant passage to determine abnormality. That is, the indoor gas temperature sensor (TH
3) It is determined whether or not the detected gas-side refrigerant temperature T3 is higher than the predetermined temperature T shown in the above equation (step ST).
63). When the gas-side refrigerant temperature T3 is equal to or lower than the predetermined temperature T, it is determined whether or not the gas-side refrigerant temperature T3 is 35 ° C (step ST64). In some cases, while returning to step ST63 while the indoor fan (F2) is turned off, when the gas-side refrigerant temperature T3 becomes higher than 35 ° C., the indoor fan (F2) is turned on (step ST64),
The procedure returns to step ST63.

On the other hand, when the gas-side refrigerant temperature T3 reaches a predetermined temperature T
If it becomes higher, the process proceeds from step ST63 to step ST66, in which a one-minute timer TM4 is set and counted (step ST67), and whether or not the gas-side refrigerant temperature T3 has become higher than the predetermined temperature T shown in the above equation again Is determined (step ST68). When the gas-side refrigerant temperature T3 is equal to or lower than the predetermined temperature T, the process returns to the step ST63. On the other hand, when the gas-side refrigerant temperature T3 becomes higher than 35 ° C., the process moves from the step ST68 to the step ST69. . That is, when the outdoor control unit (8b) starts the heating operation, the compressor (21) of the outdoor unit (2) is driven and the refrigerant circulates, so that the same refrigerant system (the same as the outdoor unit (2)) is used. 1
The refrigerant flows through the indoor unit (3) of (a, 1b,...), and the gas-side refrigerant temperature T3 becomes higher than the predetermined temperature T.

If the gas-side refrigerant temperature T3 is higher than the predetermined temperature T, it is determined again whether or not the gas-side refrigerant temperature T3 is 35 ° C. (step ST69). If is equal to or lower than 35 ° C., the process proceeds to step ST71 with the indoor fan (F2) turned off. On the other hand, when the gas-side refrigerant temperature T3 becomes higher than 35 ° C., the indoor fan (F2) is turned on ( Step ST70). And the timer TM3
It is determined whether or not the time is up (step ST71),
Step ST67 until the timer TM3 times out.
When the timer TM3 times out, the state detection means (87) determines that the refrigerant has passed, and outputs an operation state signal (step ST72). That is, when the gas-side refrigerant temperature T3 is higher than the predetermined temperature T for one minute, the indoor unit (3) is performing the heating operation. On the other hand, the system determination means (88) receives the test operation signal of the outdoor control unit (8b) and the operation state signal of the state detection means (87) in the indoor control unit (8c), and the controller (8a)
Determines whether the indoor unit (3) of the refrigerant system (1a, 1b,...) Is in an operating state, and outputs a normal signal if they match, whereas if not, it outputs a normal signal. Line (1
a, 1b,...) and the control of the controller (8a) do not correspond to each other, so that an abnormal signal is output and a mismatch is displayed on a monitor or the like.

Therefore, according to the present embodiment, the refrigerant system (1a,
1b) and the system number of the refrigerant system (1a, 1b,...) Are determined, so that an erroneous setting or the like of the system number can be reliably detected. Insufficient capacity, or conversely, it is possible to reliably prevent air-conditioning from being performed in unnecessary places, so that comfortable air-conditioning can be performed.

FIG. 12 shows a third embodiment of the invention according to the third, fourth, sixth and eighth to eleventh aspects, wherein the preceding embodiment constitutes one control system (8). , A plurality of control systems (9a, 9b,...) Corresponding to the respective refrigerant systems (1a, 1b,...).
). In FIG. 12, two refrigerant systems (1a, 1b) and two control systems (9a, 9b)
Is shown. Each of the refrigerant systems (1a, 1b) is shown in FIG.
Is the same as that shown in FIG. Each of the above control systems (9a, 9b)
An outdoor control unit (9G) for controlling the outdoor unit (2);
An indoor control unit (9N) for controlling the indoor unit (3) is wired and connected. The outdoor control unit (9G) has system operation means (91) as a feature of the present invention.
And system identification means (92), forced air blowing means (93), and
4) and an address display section (95) are provided, and the indoor control unit (9N) is provided with a refrigerant state transmitting means (96).

The system operating means (91) includes a control system (9a,
9b) Each outdoor control unit (9G) and indoor control unit (9G)
N) is configured to output a cooling forced thermo-on operation signal so as to start a cooling operation control for system identification, that is, when an operation switch or the like for wrong wiring check is turned on, the control to which the self belongs belongs. The system (9a, 9b) starts the cooling thermo-on operation. System identification means
(92) is an operation signal of the system operation means (91) and an indoor liquid temperature sensor.
(TH2) and the indoor unit belonging to the control system (9a, 9b) instructed by the system operation means (91) to operate in response to the temperature signal of (TH2).
It is determined whether or not the refrigerant state of (3) matches the command state of the system operation means (91), and a normal signal is output if it matches each indoor unit (3), and an abnormal signal if it does not match. Are respectively output. That is, as shown in FIG. 12, the refrigerant system (1a, 1b) indicated by the solid line originally matches the control system (9a, 9b) indicated by the dashed line. However, as shown by the thin line in FIG. 12, the control system (9a, 9
b) may not match the refrigerant system (1a, 1b),
The erroneous wiring is determined by the system determination means (92). Specifically, the system determination means (92) is an indoor unit.
If the temperature difference between the liquid refrigerant temperature T2a before the start of the cooling operation and the liquid refrigerant temperature T2b after the start of the cooling operation in (3) is greater than 5 ° C., a normal signal is output, and if it is 5 ° C. or less, an abnormal signal is output. The indoor liquid temperature sensor (TH2) constitutes a refrigerant state detecting means for detecting the liquid refrigerant temperature T2 in the branch pipe of the indoor heat exchanger (31). In addition, the forced air blowing means
(93) sends a forced air blowing signal to the indoor control unit (9N) of the indoor unit (3) so that the abnormal indoor unit (3) performs the air blowing operation when the system determination means (92) outputs the abnormal signal. It is configured to output. The above number display section (94)
When the system identification means (92) outputs an abnormal signal, the number of the abnormal indoor units (3) is displayed, and the address display section (95) outputs the abnormality signal from the system identifying means (92). Then, the address of the abnormal indoor unit (3) is displayed. On the other hand, the indoor control unit
The refrigerant state transmitting means (96) of (9N) transmits the temperature signal of the indoor liquid temperature sensor (TH2) to the outdoor control unit (9G) when the cooling forced thermo-on operation signal is output from the system operating means (91). It is configured to be. A remote control (9R) is connected to the indoor control unit (9N), and the remote control (9R)
Is provided with a display section (97) for displaying an abnormality when an abnormality signal is received from the system identification means (92).

Next, the refrigerant system (1a, 1b) and the control system (9
The operation for determining the match with a, 9b) will be described based on the control flow shown in FIG. First, in a state where each refrigerant system (1a, 1b) is stopped, one of the control systems (9a, 9b) is stopped.
When b) starts the match determination operation, in step ST80, an operation switch or the like for checking an incorrect wiring is turned on, and an incorrect wiring check operation is instructed by the system operation means (91). Thereafter, the process proceeds to step ST81, where it is determined whether or not the outdoor unit (2) is in standby for restart, and if the forced thermostat is in standby for restart, the process waits in step ST81 until the standby operation ends, When the operation is not in the standby state, the process proceeds from step ST81 to step ST82. In this step ST82, the heat exchanger temperature of the indoor unit (3) is transmitted to the outdoor unit (2). In other words, in the control system (9a, 9b) that performs an incorrect wiring check, the outdoor control unit (9G)
Open the solenoid valve for pressure equalization (61) fully and other actuators such as the outdoor fan (F1) to stop the cooling, while the indoor control unit (9N) fully opens the indoor electric expansion valve (32), Operate the indoor fan (F2) at high speed. And each indoor unit
The liquid refrigerant temperature T2 detected by the indoor liquid temperature sensor (TH2) in (3), specifically, the stopped liquid refrigerant temperature T2a, is transmitted to the outdoor unit (2) by the refrigerant state transmitting means (96).

Thereafter, the steps ST82 to ST
83, the system operation means (91) of the outdoor control unit (9G) outputs a cooling forced thermo-on operation signal, and the outdoor unit (2) and the indoor unit (2) belonging to the control system (9a, 9b) for performing an incorrect wiring check. 3) After starting the cooling operation of
Move to ST84 and set the timer. Then, step ST
Going to 86, the liquid refrigerant temperature T2b after the cooling operation command is transmitted from the indoor control unit (9N) of the control system (9a, 9b) that performs an incorrect wiring check to the outdoor unit (2) by the refrigerant state transmitting means (96). Is done. Thereafter, the process proceeds to step ST86 to determine whether or not the timer set in step ST84 has timed out.The process proceeds to step ST87 until the time has expired, and the system determination means (92) of the outdoor control unit (9G) sets the current It is determined whether the liquid refrigerant temperature T2b during the cooling operation has dropped by 5 ° C. or more from the liquid refrigerant temperature T2a when the operation was stopped. Then, when the liquid refrigerant temperature T2b after the current cooling operation command is lower than the liquid refrigerant temperature T2a at the time of operation stop by 5 ° C., the determination in step ST87 becomes YES, the process proceeds to step ST88, and the system determination means (92 ) Determines the normality of the refrigerant system (1a, 1b) and the control system (9a, 9b), outputs a normal signal, and returns.
On the other hand, if the liquid refrigerant temperature T2b after the current cooling operation command does not fall below the liquid refrigerant temperature T2a when the operation is stopped to 5 ° C. or more, the determination in step ST87 is NO, the process returns to step ST85, and the above-described operation is performed. Is repeated to determine whether the current liquid refrigerant temperature T2a has dropped. And
If the time is up until the current liquid refrigerant temperature T2a does not decrease, the determination in step ST86 becomes NO and the
Moving to ST89, the system determination means (92) is a refrigerant system (1a, 1b)
And the control system (9a, 9b) is determined to be abnormal, and an abnormal signal is output to return. That is, since the liquid refrigerant temperature T2b of the indoor unit (3) that has started the cooling operation is lower than the liquid refrigerant temperature T2a at the time of stoppage, if the liquid refrigerant temperature T2b of all the indoor units (3) that instructed the cooling operation is lower. , FIG. 12
As shown in the figure, the solid line refrigerant system (1a, 1b) and the one-dot chain line control system (9a, 9b) match.

On the other hand, an indoor unit instructing a cooling operation
If the liquid refrigerant temperature T2b in any of (3) does not decrease, as shown in FIG. 12, the refrigerant system (1a, 1b) indicated by the thin line and the control system (9a, 9b) indicated by the dashed line coincide with each other. Will not be. Therefore, when the refrigerant system (1a, 1b) and the control system (9a, 9b) do not match, the system determination means (92) of the outdoor control unit (9G) outputs an abnormal signal, and outputs the abnormal signal. Then, the number display unit (94) displays the number of the incorrectly wired indoor units (3), and the address display unit (95) displays the address of the incorrectly wired indoor unit (3). Also,
On the remote controller (9R) of the incorrectly wired indoor unit (3), an abnormality is displayed on the display unit (97), and the forced air blowing means (93) of the outdoor control unit (9G) is connected to the system discriminating means (93). 92)
The forced air signal is output in response to the abnormal signal, and the indoor fan (F2) of the incorrectly wired indoor unit (3) is driven to indicate an abnormality.

Therefore, according to the present embodiment, the refrigerant system (1a,
1b) and the control system (9a, 9b) match each indoor unit (3)
In order to perform this for every indoor unit (3), the indoor unit (3) with the incorrect wiring can be reliably determined even in the refrigerant system (1a, 1b) having a plurality of indoor units (3). From this,
Insufficient air conditioning capacity and the operation of the protection device can be prevented, and comfortable air conditioning can be performed. In addition, since incorrect wiring can be determined in the cooling operation, a reliable determination can be made when the outside air temperature is high. Also, the liquid refrigerant temperature
When the temperature difference of T2 is larger than 5 ° C., the normality is determined, so that it is possible to perform an accurate determination. In addition, since the abnormality is displayed on the remote controller (9R) of the incorrectly wired indoor unit (3), the incorrectly wired indoor unit (3) can be quickly identified. Also, the indoor fan of the indoor unit (3) with incorrect wiring
(F2) is driven, so it is easy for incorrectly wired indoor unit (3)
Can be identified. Also, indoor units with incorrect wiring
Since the number of (3) is displayed, maintenance can be performed quickly and easily, and the indoor unit with incorrect wiring (3)
Is displayed, even if there are a large number of indoor units (3), the indoor unit (3) with the incorrect wiring can be quickly identified.

FIG. 14 shows a fourth embodiment of the invention according to the third, fifth, sixth and eighth to eleventh aspects, wherein the system operating means (91) of the previous embodiment performs a cooling operation. In place of the configuration, a heating operation is performed. That is, the system operation means (91) performs the heating forced thermo-on operation so that the outdoor control unit (9G) and the indoor control unit (9N) for each control system (9a, 9b) start heating operation control for system discrimination. It is configured to output a signal. Further, the system determination means (92) outputs a normal signal when the difference between the gas refrigerant temperature T3a before the start of the heating operation and the gas refrigerant temperature T3b after the start of the heating operation in the indoor unit (3) becomes larger than 5 ° C.
When the temperature is below 5 ° C, an abnormal signal is output, and the indoor gas temperature sensor (TH3) is connected to the indoor heat exchanger (31).
Constitutes a refrigerant state detecting means for detecting the gas refrigerant temperature T3 in the above.

A description will now be given, with reference to FIG. 14, of the coincidence determination operation in the heating operation. Note that this coincidence determination operation is almost the same as the coincidence determination operation by the cooling operation (see FIG. 13), and mainly the differences will be described. First, in a state where each refrigerant system (1a, 1b) is stopped, when any one control system (9a, 9b) starts a coincidence determination operation,
If the miswiring check operation is instructed by the system operation means (91) and the outdoor unit (2) is not in the restart standby state, the stopped gas refrigerant detected by the indoor gas temperature sensor (TH3) in each indoor unit (3) While the temperature T3a is transmitted to the outdoor unit (2), the system operation means (91) outputs a heating forced thermo-on operation signal and performs a control system (9a, 9
After starting the heating operation of the outdoor unit (2) and the indoor unit (3) belonging to b), set the timer (step
ST90 to step ST94). Subsequently, the gas refrigerant temperature T3b after the heating operation command is issued from each indoor control unit (9N) of the control system (9a, 9b) for performing the miswiring check to the outdoor unit (2)
Until the timer expires, the system determination means (92) of the outdoor control unit (9G) determines that the gas refrigerant temperature T3b after the current heating operation command is 5 ° C. higher than the gas refrigerant temperature T3a when the operation is stopped. It is determined whether it has risen (step ST95 to step ST97). Then, when the gas refrigerant temperature T3b after the current heating operation command is higher than the gas refrigerant temperature T3a at the time of operation stop by 5 ° C., the system discrimination means (92) makes the refrigerant system (1a, 1b) and the control system (9a, 9
b) is determined to be normal (step ST98), a normal signal is output, and the routine returns. On the other hand, if the gas refrigerant temperature T3b after the current heating operation command does not rise to 5 ° C. or more from the gas refrigerant temperature T3a when the operation is stopped, when the timer times out, the system determination means (92)
Means to judge an abnormality between the refrigerant system (1a, 1b) and the control system (9a, 9b) (step ST99), output an abnormality signal, and return. That is, the gas refrigerant temperature T3b of the indoor unit (3) that has started the heating operation is higher than the gas refrigerant temperature T3a at the time of stoppage. In other words, the refrigerant system (1a, 1b) and the control system (9a, 9b) match.

On the other hand, an indoor unit instructing a heating operation
If any of the gas refrigerant temperatures T3b in (3) does not rise, the refrigerant system (1a, 1b) does not match the control system (9a, 9b). Then, in response to the abnormal signal of the system determination means (92) of the outdoor control unit (9G), the number display unit (94) displays the number of the incorrectly wired indoor units (3), and the address display unit (9G).
5) displays the address of the incorrectly wired indoor unit (3), while the remote control (9R) of the incorrectly wired indoor unit (3)
Is displayed on the display (97), the forced air blowing means (93) outputs a forced air blowing signal, and the indoor fan (F2) in the incorrectly wired indoor unit (3) is driven to Will be shown.

Therefore, according to this embodiment, erroneous wiring can be determined in the heating operation, so that even when the outside air temperature is low, the connection between the refrigerant system (1a, 1b) and the control system (9a, 9b) is not required. The coincidence can be reliably determined, the shortage of the air conditioning capacity and the operation of the protection device can be prevented, and comfortable air conditioning can be performed.

FIG. 15 shows a fifth embodiment of the third and seventh to eleventh aspects of the present invention, in which the system operating means (91) of the previous embodiment shown in FIG. 13 performs a cooling operation. Instead of the configuration, the air-blowing operation is performed.
In other words, the system operation means (91) transmits the blow operation signal so that the outdoor control unit (9G) and the indoor control unit (9N) for each control system (9a, 9b) start the blow operation control for system determination. It is configured to output. That is, each refrigerant system (1
When a, 1b) is performing the cooling operation, it cannot be determined by the determination operation of FIG. 13, so that the blowing operation is performed. The system determination means (92) is an indoor unit.
In (3), a normal signal is output when the temperature difference between the liquid refrigerant temperature T2a before the start of the blow operation and the liquid refrigerant temperature T2b after the start of the blow operation is 2 ° C. or less, and an abnormal signal is output when the temperature difference exceeds 2 ° C. Is configured.

A description will now be given, with reference to FIG. 15, of the coincidence determination operation based on the blowing operation. Note that this coincidence determination operation is almost the same as the coincidence determination operation by the cooling operation (see FIG. 13), and mainly the differences will be described. First, in a state where each refrigerant system (1a, 1b) is stopped, when any one control system (9a, 9b) starts a coincidence determination operation,
When the miswiring check operation is instructed by the system operation means (91), the outdoor unit (2) enters a restart standby state (for example, a 5-minute stop state) in a cooling stop state. The liquid refrigerant temperature T2a before the blow operation (stop state) detected by the indoor liquid temperature sensor (TH2) in the indoor unit (3) is transmitted to the outdoor unit (2), while the system operation means (91) transmits the blow operation signal. The indoor motor-operated expansion valve (32) of the indoor unit (3) belonging to the control system (9a, 9b) that performs an incorrect wiring check is fully opened, and the indoor fan (F
2) After high-speed operation, set the timer (step ST
100 to step ST104). Subsequently, the liquid refrigerant temperature T2b after the blow operation command is issued from each indoor control unit (9N) of the control system (9a, 9b) that performs the above-described incorrect wiring check is output to the outdoor unit.
(2) until the timer expires, the system discriminating means (92) of the outdoor control unit (9G) changes the liquid refrigerant temperature T2b after the current blow operation command to 2 ° C from the liquid refrigerant temperature T2a at the time of stoppage. It is determined whether or not it has decreased below (steps ST105 to ST107).

Then, the liquid refrigerant temperature T2b after the current blow operation command is 2 ° C. lower than the liquid refrigerant temperature T2a at the time of stoppage.
If the time goes up without falling below,
(92) determines whether the refrigerant system (1a, 1b) and the control system (9a, 9b) are normal (step ST108), outputs a normal signal, and returns. On the other hand, the liquid refrigerant temperature T2b after the current blow operation command is higher than the liquid refrigerant temperature T2a at the time of stoppage by two.
If the temperature is lower than ° C., when the timer expires, the system determination means (92) determines an abnormality between the refrigerant system (1a, 1b) and the control system (9a, 9b) (step ST109). It returns an abnormal signal and returns. That is, in the cooling stop state before the blowing operation, the indoor electric expansion valve (32) is closed or throttled, so that no refrigerant flows or only a small amount of refrigerant flows in the incorrectly wired indoor unit (3).
The liquid refrigerant temperature T2a of the indoor unit (3) is almost equal to the indoor temperature T1. Then, when the blowing operation is started, if the wiring is incorrect, the indoor electric expansion valve (32) is fully opened (see step ST103), so that the refrigerant flows to lower the liquid refrigerant temperature T2b. This means that the refrigerant system (1a, 1b) and the control system (9a, 9b) match unless the liquid refrigerant temperature T2b of the indoor unit (3) that has started the blowing operation does not change. On the other hand, the indoor unit that ordered the blow operation
When any of the liquid refrigerant temperatures T2b in (3) decreases, the refrigerant system
(1a, 1b) does not match the control system (9a, 9b). Then, the system control means (9G) of the outdoor control unit (9G)
The number display section (94) displays the number of mis-wired indoor units (3) in response to the abnormal signal of (2), and the address display section (95) displays the address of the mis-wired indoor unit (3). On the other hand, on the remote controller (9R) of the incorrectly wired indoor unit (3), an error is displayed on the display section (97), and the forced air blowing means (93) outputs a forced air blowing signal, resulting in incorrect wiring. The indoor fan (F2) in the indoor unit (3) that has been driven will be driven to indicate an abnormality. Therefore, according to the present embodiment, erroneous wiring can be determined by the air blowing operation, so that other refrigerant systems (1a, 1
Even if b) is performing the cooling operation, the erroneous wiring determination can be reliably performed.

FIG. 16 shows a sixth embodiment of the invention according to claims 3 and 7 to 11. The system operation means (91) of the previous embodiment shown in FIG. Instead of performing the operation, the air-blowing operation is performed from the heating operation. That is, when the refrigerant systems (1a, 1b) are performing the heating operation, the system operation means (91) cannot perform the determination operation in FIG. 14 and thus performs the air blowing operation. Further, the system determination means (92) outputs a normal signal when the temperature difference between the gas refrigerant temperature T3a before the start of the blow operation and the gas refrigerant temperature T3b after the start of the blow operation in the indoor unit (3) is 2 ° C. or less. When the temperature exceeds 2 ° C., an abnormal signal is output.

A description will now be given, with reference to FIG. 15, of the coincidence determination operation based on the blowing operation. Note that this match determination operation is almost the same as the match determination operation according to the previous embodiment (see FIG. 15), and mainly the differences will be described. First, in a state where each refrigerant system (1a, 1b) is stopped, when any one control system (9a, 9b) starts a coincidence determination operation,
When the miswiring check operation is commanded by the system operation means (91), the outdoor unit (2) enters a restart standby state (for example, a 5-minute stop state) in a heating stop state. The gas refrigerant temperature T3a before the blowing operation (stop state) detected by the indoor gas temperature sensor (TH3) in the indoor unit (3) is transmitted to the outdoor unit (2), while the system operation means (91) transmits the blowing operation signal. Indoor unit belonging to the control system (9a, 9b) that outputs
After fully opening the indoor electric expansion valve (32) of (3) and operating the indoor fan (F2) at high speed, a timer is set (steps ST110 to ST114). Subsequently, the gas refrigerant temperature T3b after the blowing operation command is transmitted to the outdoor unit (2) from each indoor control unit (9N) of the control system (9a, 9b) that performs a miswiring check until the timer expires. The system determination means (92) of the outdoor control unit (9G) determines whether or not the gas refrigerant temperature T3b after the current blowing operation command has risen to 2 ° C. or more from the gas refrigerant temperature T3a when stopped (step ST115). ~ Step ST117). And
If the gas refrigerant temperature T3b after the current air blowing operation command does not become 2 ° C. or higher than the gas refrigerant temperature T3a at the time of stoppage and the time is up, the system discrimination means (92) sets the refrigerant system (1).
a, 1b) and the control system (9a, 9b) are normal (step
ST118), a normal signal is output and the routine returns.
On the other hand, the gas refrigerant temperature T3b after the current blow operation command
If the temperature is higher than 2 ° C. from the gas refrigerant temperature T3a at the time of stoppage, when the timer expires, the system determination means (92) causes the refrigerant system (1a, 1b) and the control system (9a, 9) to operate.
b) is determined (step ST119), an abnormal signal is output, and the routine returns. That is, in the heating stop state before the air blowing operation, the indoor electric expansion valve (32) is closed or throttled, so that no refrigerant flows or only a small amount of the refrigerant flows in the incorrectly wired indoor unit (3). unit
The gas refrigerant temperature T3a in (3) becomes almost equal to the room temperature T1. Then, when the blowing operation is started, if the wiring is incorrect, the indoor electric expansion valve (32) is fully opened (see step ST113), so that the refrigerant flows and the gas refrigerant temperature T3b rises. This means that the refrigerant system (1a, 1b) and the control system (9a, 9b) match unless the gas refrigerant temperature T3b of the indoor unit (3) that has started the blowing operation changes.

On the other hand, an indoor unit instructing the blow operation
When any one of the gas refrigerant temperatures T3b in (3) increases, the refrigerant system (1a, 1b) and the control system (9a, 9b) do not match. And the system determination means of the outdoor control unit (9G)
In response to the abnormal signal of (92), the number display section (94) displays the number of incorrectly wired indoor units (3), and the address display section (95)
Displays the address of the incorrectly wired indoor unit (3), while the remote control (9R) of the incorrectly wired indoor unit (3) displays an error on the display (97) and displays (93) outputs a forced air blowing signal, and the indoor fan (F2) of the incorrectly wired indoor unit (3) is driven to indicate an abnormality. Therefore, according to the present embodiment, erroneous wiring can be determined in the blowing operation, so that other refrigerant systems (1a, 1
b,...) can perform a reliable miswiring determination even during the heating operation.

Although the test operation switch (81) is provided in the central control unit (8e) in the first embodiment, it may be provided in the outdoor unit (2) or the remote controller (8d).
That is, when a test operation switch is provided in the outdoor unit (2), a test operation signal is transmitted from one outdoor control unit (8b) to the other outdoor control units (8b) and the indoor control unit (8c). When the remote control (8d) is provided with a test operation switch, a test operation signal is transmitted to each of the outdoor control unit (8b) and the indoor control unit (8c) via the indoor control unit (8c). In the second embodiment, the test operation signal is output from each outdoor control unit (8b).
You may make it output from (8d). In the first and second embodiments, the refrigerant system (1a, 1b,...) May be of a pair type having one outdoor unit (2) and one indoor unit (3). The systems (1a, 1b, ...) are not limited to the examples. In the third to sixth embodiments, an indoor liquid temperature sensor (T
H2) and the indoor gas temperature sensor (TH3), but the intake air temperature sensor (room temperature sensor TH1 in this embodiment) that detects the indoor intake air temperature, and the blow-out air temperature sensor that detects the indoor blow-out air temperature May be used. 14 and FIG. 16, the refrigerant state is determined based on the indoor temperature of the intake air temperature sensor (the room temperature sensor TH1 in the present embodiment) and the gas refrigerant temperature of the indoor gas temperature sensor (TH3). The determination may be made. In the third to sixth embodiments, the remote controller (9R) is provided for each indoor unit (3). However, it is not always necessary to provide the remote controller (9R) for all indoor units (3). Indoor unit (3)
Means that only the indoor fan (F2) is driven.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a configuration of the invention according to claim 1;

FIG. 2 is a block diagram showing a configuration of the invention according to claim 2;

FIG. 3 is a block diagram showing a configuration of the invention according to claims 3 to 11;

FIG. 4 is a system diagram showing an entire system of the air conditioner.

FIG. 5 is a refrigerant circuit diagram showing a refrigerant system.

FIG. 6 is a control flowchart showing a system number setting of the outdoor control unit.

FIG. 7 is a control flowchart showing a system number setting of an outdoor control unit.

FIG. 8 is a control flowchart showing a system number setting of an indoor control unit.

FIG. 9 is a control flowchart showing refrigerant flow determination of the indoor control unit.

FIG. 10 is a control flowchart showing refrigerant flow determination of the indoor control unit.

FIG. 11 is a control flowchart showing refrigerant flow determination of the indoor control unit in the second embodiment.

FIG. 12 is a schematic system diagram of an air conditioner according to a third embodiment.

FIG. 13 is a control flowchart showing an erroneous wiring determination operation in the third embodiment.

FIG. 14 is a control flowchart showing an erroneous wiring determination operation in the fourth embodiment.

FIG. 15 is a control flowchart showing an erroneous wiring determination operation in the fifth embodiment.

FIG. 16 is a control flowchart showing an erroneous wiring determination operation in a sixth embodiment.

FIG. 17 is a system diagram showing a normal setting state of a system number.

FIG. 18 is a system diagram showing an erroneous setting of a system number.

FIG. 19 is a system diagram showing an erroneous setting of a system number.

FIG. 20 is a system diagram showing an erroneous setting of a system number.

[Explanation of symbols]

 1a, 1b Refrigerant system 2 Outdoor unit 3 Indoor unit 8,9a, 9b Control system 8a Controller (air conditioning control means) 8b, 9G Outdoor control unit 8c, 9N Indoor control unit 8d, 9R Remote controller 8e Central control unit 81 Test run switch (setting Start means) 82 system number output means 83 operation start means 84 operation determination means 85 PROM (system number storage means) 86 test run switch (operation command means) 87 status detection means 88 system determination means 91 system operation means 92 system determination means 93 compulsory Blowing means 94 Number display section 95 Address display section 97 Display section TH2 Indoor liquid temperature sensor (refrigerant state detecting means) TH3 Indoor gas temperature sensor (refrigerant state detecting means)

────────────────────────────────────────────────── ─── Continuing from the front page (72) Inventor Shinichi Nakaishi 1304 Kanaokacho, Sakai City, Osaka Daikin Industries, Ltd.Sakai Factory Kanaoka Plant (72) Inventor Osamu Tanaka 1304, Kanaokacho, Sakai City, Osaka Daikin Industries Sakai Seisakusho Kanaoka Plant (56) References JP-A-4-76346 (JP, A) JP-A-4-76342 (JP, A) JP-A-63-80151 (JP, A) JP-A-62 238940 (JP, A) Fully open 1988-113845 (JP, U) (58) Fields investigated (Int. Cl. ⁷ , DB name) F24F 11/02 102 F24F 11/02 103 F24F 11/02

Claims (11)

(57) [Claims] A plurality of refrigerant systems (1a, 1b, ...) having an outdoor unit (2) and an indoor unit (3) are provided, and the outdoor unit (2) of each of the refrigerant systems (1a, 1b, ...) is provided. And an outdoor control unit (8b) and an indoor control unit (8c) for controlling the indoor unit (3) are wired and connected to the outdoor unit (2).
And an operation control device for an air conditioner, comprising one control system (8) for controlling the indoor unit (3), wherein the system control unit sets the system number of the refrigerant system (1a, 1b,...). Setting start means (81) for outputting a setting start signal to the outdoor control unit (8b) is provided, and the outdoor control unit (8b) is set in advance by receiving the setting start signal of the setting start means (81). System number output means (82) for outputting the system number and operation command of its own refrigerant system (1a, 1b, ...) in the order of the unique number of each outdoor unit (2); An operation start means (83) for starting an air conditioning operation in response to an operation command is provided, while the indoor control unit (8c) includes an outdoor control unit (8b).
The operation determination means (84) which receives an operation command from the system number output means (82) to determine whether the operation state is the operation state, and outputs an operation state signal when the operation state is the operation state, and the operation judgment means (84) An air conditioner, comprising: a system number storage unit (85) that stores a system number output by a system number output unit (82) in the outdoor control unit (8b) when the operation state signal is output. Operation control device of the device. 2. A plurality of refrigerant systems (1a, 1b,...) Having an outdoor unit (2) and an indoor unit (3) are provided, and an outdoor unit (2) of each of the refrigerant systems (1a, 1b,...). And an outdoor control unit (8b) and an indoor control unit (8c) for controlling the indoor unit (3) are wired and connected to the outdoor unit (2).
And an operation control device for an air conditioner, comprising one control system (8) for controlling the indoor unit (3), wherein each of the refrigerant systems is controlled by the outdoor control unit (8b) and the indoor control unit (8c). Air-conditioning control means (8a) for controlling the air-conditioning operation for each of (1a, 1b, ...)
(8a) instructs the air conditioning control means (8a) to execute the air conditioning operation of each of the refrigerant systems (1a, 1b,...).
While an operation command means (86) for outputting an operation command signal for each refrigerant system is provided, when the operation command means (86) outputs an operation command signal to the air conditioning control means (8a), each of the refrigerant systems (1a , 1b,…)
The outdoor unit (2) and the indoor unit (3) are determined whether or not the outdoor unit (2) and the indoor unit (3) are in operation.
When (3) is in the operating state, state detecting means (87) for outputting an operating state signal for each of the outdoor unit (2) and the indoor unit (3), and an operation command signal of the operation command means (86) And the operating state signal of the state detecting means (87), the operation commanding means (86) commands the operation of the refrigerant system (1a, 1b,...), And the outdoor units detected by the state detecting means (87) ( 2) and the refrigerant system (1a, 1b,...) Of the indoor unit (3) is determined as to whether or not they match, and if they match, a normal signal is output, and if not, an abnormal signal is output. An operation control device for an air conditioner, comprising means (88). 3. An outdoor unit (2) and a plurality of indoor units.
(3), and an outdoor control unit (1a, 1b,...) For controlling the outdoor unit (2) and the indoor unit (3) of each of the refrigerant systems (1a, 1b,...). 9G) and the indoor control unit (9N) are wired and connected to each refrigerant system (1a, 1b,
An operation control device of an air conditioner provided with a plurality of control systems (9a, 9b,...) For controlling the operation of each of the indoor units (3). An output refrigerant state detecting means (TH2, TH3); and an outdoor control unit (9G) for each of the control systems (9a, 9b,...).
An operation command signal is sent to the outdoor control unit (9G) and the indoor control unit (9N) for each control system (9a, 9b,...) So that the indoor control unit (9N) starts operation control for system discrimination. The system operation means (91) receives the operation command signal of the system operation means (91) to be output and the state signal of the refrigerant state detection means (TH2, TH3). It is determined whether or not the refrigerant state of each indoor unit belonging to the control system (9a, 9b,...) Matches the command state of the system operation means (91). An operation control device for an air conditioner, comprising: a system discriminating means (92) for outputting a normal signal when there is an error and an abnormal signal when there is no match. 4. The operation control device for an air conditioner according to claim 3, wherein the refrigerant state detecting means (TH2) is configured to detect a heat exchanger temperature in the indoor unit (3). 91) is configured to output a cooling forced thermo-on operation signal, while the system determination means (92) is configured to output a temperature difference between the heat exchanger temperature before the cooling operation starts and the heat exchanger temperature after the cooling operation starts. An operation control device for an air conditioner, characterized in that a normal signal is output when the temperature is higher than a predetermined temperature, and an abnormal signal is output when the temperature is lower than the predetermined temperature. 5. The operation control device for an air conditioner according to claim 3, wherein the refrigerant state detecting means (TH3) is configured to detect a temperature of the heat exchanger in the indoor unit (3). 91) is configured to output a heating forced thermo-on operation signal, while the system determination means (92) is configured to output a temperature difference between the heat exchanger temperature before the heating operation is started and the heat exchanger temperature after the heating operation is started. The air conditioner operation control device is configured to output a normal signal when the temperature exceeds a predetermined temperature and an abnormal signal when the temperature is equal to or lower than the predetermined temperature. 6. The operation control device for an air conditioner according to claim 4, wherein the system discriminating means (92) determines a temperature difference between a heat exchanger temperature before the operation is started and a heat exchanger temperature after the operation is started. An operation control device for an air conditioner, wherein a normal signal is output when the temperature is higher than 5 ° C., and an abnormal signal is output when the temperature is 5 ° C. or lower. 7. The operation control device for an air conditioner according to claim 3, wherein the refrigerant state detecting means (TH2, TH3) is configured to detect a heat exchanger temperature in the indoor unit (3). The means (91) is configured to output a blowing operation signal, while the system determination means (92) determines a temperature difference between the heat exchanger temperature before the start of the blowing operation and the heat exchanger temperature after the start of the blowing operation. An operation control device for an air conditioner, wherein a normal signal is output when the temperature is equal to or lower than a predetermined temperature, and an abnormal signal is output when the temperature exceeds a predetermined temperature. 8. The operation control device for an air conditioner according to claim 3, wherein the indoor control unit (9N) includes a display unit (97) for displaying an abnormality when an abnormality signal is received from the system determination unit (92). An operation control device for an air conditioner, comprising a remote controller (9R) provided. 9. The operation control device for an air conditioner according to claim 3, wherein when the system determination means (92) outputs an abnormal signal, the abnormal indoor unit (3) performs a blowing operation.
(3) An operation control device for an air conditioner, comprising: a forced air blowing means (93) for outputting a forced air blowing signal to the indoor control unit (9N). 10. The operation control device for an air conditioner according to claim 3, wherein when the system determination means (92) outputs an abnormal signal to the outdoor control unit (9G), the number of abnormal indoor units (3) is increased. An operation control device for an air conditioner, comprising: a number display unit (94) for displaying the number. 11. The operation control device for an air conditioner according to claim 3, wherein when the system determination means (92) outputs an abnormal signal, the address of the abnormal indoor unit (3) is output to the outdoor control unit (9G). An operation control device for an air conditioner, comprising: an address display unit (95) for displaying an address.