CN218787637U

CN218787637U - Four-pipe system, control device and air conditioner

Info

Publication number: CN218787637U
Application number: CN202223214438.9U
Authority: CN
Inventors: 周进; 李龙; 周会芳
Original assignee: Gree Electric Appliances Inc of Zhuhai
Current assignee: Gree Electric Appliances Inc of Zhuhai
Priority date: 2022-11-30
Filing date: 2022-11-30
Publication date: 2023-04-04
Anticipated expiration: 2032-11-30

Abstract

The utility model relates to a four-pipe system, controlling means and air conditioner relates to refrigeration and heating technical field, and the four-pipe system of making who has solved existence among the prior art system relies on one or more cross valve control to switch to change the poor problem of refrigerant flow direction reliability. The four-pipe system comprises a compressor, wherein a first control valve, an air-cooled heat exchanger, a first throttling part, a third control valve, a cold water heat exchanger and an air suction port of the compressor are sequentially connected along an air exhaust port of the compressor to form a refrigeration loop; the hot water heat exchanger, the second throttling component, the first throttling component, the air cooling heat exchanger, the second control valve and the air suction port of the compressor are sequentially connected along the air exhaust port of the compressor to form a heating loop; and the hot water heat exchanger, the second throttling part, the third control valve, the cold water heat exchanger and the air suction port of the compressor are sequentially connected along the air exhaust port of the compressor to form a cold and hot combined supply loop.

Description

Four-pipe system, control device and air conditioner

Technical Field

The utility model relates to a refrigeration heats technical field, concretely relates to four pipe system, controlling means and air conditioners.

Background

Along with the development of economy and science and technology, the living standard of people is continuously improved, and the requirements of more and more use places on an air conditioning system are also improved. Hospitals, hotels, restaurants, shopping malls and other places have more and more diversified requirements on different cold and hot. The design of the four-pipe cooling unit with multiple operation modes can meet the use requirements of various places under various working conditions all the year around, and more users select the four-pipe cooling water unit at present.

In the prior art, a four-pipe water chiller unit is an air conditioner host system capable of achieving independent water chilling, independent water heating and simultaneous heating and cooling functions.

The conventional four-pipe set usually depends on one or more four-way valves to control and switch to change the flow direction of the refrigerant to realize multiple functions, and the four-way valves are easy to block, and valve cores damage the leakage of the refrigerant and other failure risks, so that the reliability of the four-pipe set is weakened, the four-way valves are complex to control, and meanwhile, the four-way valves are devices with the highest cost except a compressor, a condenser and an evaporator in air conditioner components, which is particularly prominent for large-scale water chilling units and increases the unit cost.

SUMMERY OF THE UTILITY MODEL

In view of this, an object of the present invention is to provide a four-pipe system, a control device and an air conditioner, so as to solve the technical problem that the reliability of the flow direction of the refrigerant is poor when the four-pipe system unit in the prior art is switched by one or more four-way valves.

In order to achieve the above purpose, the utility model provides a following technical scheme:

according to a first aspect of embodiments of the present invention, there is provided a four-pipe system, comprising a compressor, a first control valve, an air-cooled heat exchanger, a first throttling component, a third control valve, a cold water heat exchanger, and an air suction port of the compressor are sequentially connected along an air outlet of the compressor to form a refrigeration loop;

the hot water heat exchanger, the second throttling component, the first throttling component, the air-cooled heat exchanger, the second control valve and the air suction port of the compressor are sequentially connected along the air exhaust port of the compressor to form a heating loop;

and the hot water heat exchanger, the second throttling part, the third control valve, the cold water heat exchanger and the air suction port of the compressor are sequentially connected along the air exhaust port of the compressor to form a cold and hot combined supply loop.

As an optional embodiment of the present invention, the first control valve the second control valve and the third control valve are one-way solenoid valves, wherein:

the first control valve and the second control valve are respectively arranged between the compressor and the air-cooled heat exchanger, and the inlet end of the first control valve and the outlet end of the second control valve are respectively communicated with the exhaust port end of the compressor; and the outlet end of the third control valve is communicated with the cold water heat exchanger.

As an optional embodiment of the present invention, the first throttling component and the second throttling component are electronic expansion valves.

As the utility model discloses optional embodiment, cold water temperature sensor is installed to cold water heat exchanger's play water end, cold water temperature sensor is used for detecting cold water side temperature of water that goes out.

As the utility model discloses optional embodiment, hot water temperature sensor is all installed to hot water heat exchanger's play water end, hot water temperature sensor is used for detecting hot water side outlet temperature degree.

As an optional embodiment of the present invention, the hot water heat exchanger and the cold water heat exchange are fin heat exchangers.

According to the utility model discloses in the second aspect of the embodiment, provide a controlling means of four management systems, include:

the acquisition module is used for acquiring the cold and hot load requirements of a user;

the determining module is used for determining the operation mode of the four-pipe system according to the cold and heat load requirements of a user;

and the control module is used for controlling the operation of the four-control system according to the operation mode.

As an optional embodiment of the present invention, the determining module includes:

the first detection unit is used for detecting the actual water temperature of the cold water side of the cold water heat exchanger;

the first comparison unit is used for comparing the actual water temperature of the cold water side with the target water temperature of the cold water side;

and the first adjusting unit is used for adjusting the opening of the first throttling component according to the comparison result of the actual water temperature of the cold water side and the target water temperature of the cold water side.

As an optional embodiment of the present invention, the determining module further comprises:

the second detection unit is used for detecting the actual water temperature of the hot water side of the hot water heat exchanger;

the second comparison unit is used for comparing the actual water temperature of the hot water side with the target water temperature of the hot water side;

and the second adjusting unit is used for adjusting the opening degree of the first throttling component according to the comparison result of the actual water temperature of the hot water side and the target water temperature of the hot water side.

According to a third aspect of the embodiments of the present invention, there is provided an air conditioner, comprising the four-pipe system, and/or the control device of the four-pipe system.

The utility model provides a four pipe system, more conventional system has cancelled the use of cross valve, has simplified the system architecture, utilizes conventional control valve (solenoid valve) on-off control just can realize all functions of four control, including refrigeration, heat, the demand of cold and hot antithetical couplet confession switches and realize cold and hot independent regulation when the heat supply of cooling simultaneously to adapt to user's actual demand, make entire system simple more nimble, improved the reliability of system.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a schematic structural diagram of a four-pipe system according to an embodiment of the present invention;

fig. 2 is a schematic structural diagram of the principle in the cooling mode provided by the embodiment of the present invention;

fig. 3 is a schematic structural diagram of the principle in the heating mode provided by the embodiment of the present invention;

fig. 4 is a schematic structural diagram of the cooling and heating combined supply mode provided by the embodiment of the present invention;

fig. 5 is a schematic flowchart of a control method of a four-pipe system according to an embodiment of the present invention;

fig. 6 is a schematic flow chart illustrating an embodiment of adjusting refrigeration capacity in a combined cooling and heating mode according to an embodiment of the present invention;

fig. 7 is a schematic flow chart illustrating an embodiment of adjusting the amount of heating in the combined cooling and heating mode according to an embodiment of the present invention;

fig. 8 is a schematic structural diagram of a control device of a four-pipe system according to an embodiment of the present invention;

fig. 9 is a schematic structural diagram of an air conditioner according to an embodiment of the present invention.

In the figure: 1. a compressor; 2. a hot water heat exchanger; 3. a cold water heat exchanger; 4. an air-cooled heat exchanger; 5. a first control valve; 6. a second control valve; 7. a third control valve; 8. a first throttling member; 9. a second throttling member.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention clearer, the technical solutions of the present invention will be described in detail below. It is to be understood that the disclosed embodiments are merely exemplary of the invention, and are not intended to limit the invention to the precise embodiments disclosed. Based on the embodiments of the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

Referring to fig. 1, the utility model provides a four pipe system, including compressor 1, hot water heat exchanger 2, cold water heat exchanger 3, air-cooled heat exchanger 4, first control valve 5, second control valve 6, third control valve 7, first throttle part 8, second throttle part 9.

The refrigerant in the compressor 1 passes through the first control valve 5, the air-cooled heat exchanger 4, the first throttling part 8, the third control valve 7 and the cold water heat exchanger 3 along the exhaust port of the compressor 1 in sequence and returns to the air suction port of the compressor 1 to form a refrigeration loop; the refrigerant in the compressor 1 passes through the hot water heat exchanger 2, the second throttling part 9, the first throttling part 8, the air-cooled heat exchanger 4 and the second control valve 6 along the exhaust port of the compressor 1 in sequence and returns to the air suction port of the compressor 1 to form a heating loop; the refrigerant in the compressor 1 passes through the hot water heat exchanger 2, the second throttling element 9, the third control valve 7 and the cold water heat exchanger 3 along the exhaust port of the compressor 1 in sequence and returns to the air suction port of the compressor 1 to form a cold and hot combined supply loop.

According to the four-pipe system in the scheme as above, it utilizes conventional control valve (solenoid valve) on-off control just can realize all functions of four controls, including refrigeration, heating, the demand of cold and hot antithetical couplet confession switches and realizes cold and hot independent regulation when the heat supply of cooling simultaneously, with adaptation user's actual demand, more conventional four-pipe system, the utility model provides a four-pipe system has cancelled the use of cross valve, and the effectual conventional four-pipe system of having avoided group usually relies on one or more cross valves to control to switch and changes the refrigerant flow direction and realize multiple functions, because the cross valve action has the card easily to die, the case damages inefficacy risk such as refrigerant leakage, thereby makes the reliability of four-pipe system weakened the problem, and then has promoted the stability and the reliability of unit operation.

Optionally, the first control valve 5, the second control valve 6 and the third control valve 7 are all one-way solenoid valves. The first control valve 5 and the second control valve 6 are respectively arranged between the compressor 1 and the air-cooled heat exchanger 4, and the inlet end of the first control valve 5 and the outlet end of the second control valve 6 are respectively communicated with the exhaust port end of the compressor 1; the outlet end of the third control valve 7 is communicated with the cold water heat exchanger 3.

Optionally, the first throttling element 8 and the second throttling element 9 are both provided as electronic expansion valves. The hot water heat exchanger 2 and the cold water heat exchanger 3 are both fin heat exchangers.

By arranging the three one-way electromagnetic valves and the two electronic expansion valves in the four-pipe system, the pipeline arrangement of the four-pipe system can be effectively optimized, and the cost is saved on the premise of ensuring the normal operation of the system.

The embodiment of the utility model provides an in, temperature sensor is all installed to cold water heat exchanger 3's the play water end and hot water heat exchanger 2's play water end, and cold water temperature sensor is installed to cold water heat exchanger 3's the play water end and is used for detecting cold water side temperature of leaving water, and hot water leaving water temperature is installed to hot water heat exchanger 2's the play water end for detect hot water side temperature of leaving water.

In a specific four-pipe system, the switching among the cooling mode, the heating mode and the combined cooling and heating mode can be realized by controlling the power on/off of the first control valve 5, the second control valve 6 and the third control valve 7 and the on/off of the first throttling part 8 and the second throttling part 9, so that different functions can be realized.

In order to more clearly illustrate the situation of the four-pipe system loop control in the technical solution of the present invention, the four-pipe system loop control is defined and explained as the following multiple operation modes by way of example:

a refrigeration mode: the first control valve 5 is opened, the second control valve 6 is closed, the third control valve 7 is opened, the first throttling part 8 is opened, and the second throttling part 9 is closed; the operating cycle at this time is: discharge port of compressor 1 → first control valve 5 → air-cooled heat exchanger 4 → first throttling part 8 → third control valve 7 → cold water heat exchanger 3 → suction port of compressor 1 (as shown in fig. 2). It should be noted that, since the second throttling member 9 is closed, although the exhaust gas enters the hot water heat exchanger 2, the hot water side does not continuously exchange heat in a state where water is not supplied, and therefore, the cooling side is not affected.

A heating mode: the first control valve 5 is closed, the second control valve 6 is opened, the third control valve 7 is closed, the second throttling part 9 is opened, and the first throttling part 8 is opened; the operating cycle at this time is: the discharge port of the compressor 1 → the hot water heat exchanger 2 → the second throttling part 9 → the first throttling part 8 → the air-cooled heat exchanger 4 → the second control valve 6 → the suction port of the compressor 1 (as shown in fig. 3).

A cold and hot combined supply mode: the first control valve 5 is closed, the second control valve 6 is closed, the third control valve 7 is opened, the first throttling part 8 is closed, and the second throttling part 9 is opened; the operating cycle at this time is: an exhaust port of the compressor 1 → the hot water heat exchanger 2 → the second throttling part 9 → the third control valve 7 → the cold water heat exchanger 3 → an intake port of the compressor 1 (as shown in fig. 4).

When the cold and hot circumstances that need reduce the refrigerating capacity alone appear when supplying the mode operation to the antithetical couplet, first throttling element 8 is opened, opens air-cooled heat exchanger 4's fan and second control valve 6 in step, utilizes air-cooled heat exchanger 4 to act as the bypass evaporimeter, the refrigerant after the bypass part throttle. The first throttle element 8 is now controlled as a function of the target cold water temperature on the cold water side. When the condition that need reduce the heating capacity alone appears when cold and hot confession mode operation, first throttling element 8 is opened, opens air cooled heat exchanger 4's fan and first control valve 5 in step, utilizes air cooled heat exchanger 4 to act as the bypass condenser, and the bypass part is carminative. The first throttling member 8 is now controlled according to the target water temperature on the hot water side.

Based on a general utility model concept, the embodiment of the utility model provides a control method of four management systems is still provided. Fig. 2 is a schematic flow diagram provided by an embodiment of the control method of the four-pipe control system of the present invention, referring to fig. 2, the control method of the four-pipe control system of the present invention can be applied to the four-pipe control system recorded in any of the above embodiments, and can include the following steps:

s21, acquiring the cold and hot load requirements of a user;

s22, determining the operation mode of the four-pipe system according to the cold and heat load requirements of a user, wherein the operation mode comprises a refrigeration mode, a heating mode and a combined cold and heat supply mode;

if the cold and heat load requirement of the user is single refrigeration, determining that the four-pipe control system operates in a refrigeration mode; if the cold and heat load requirement of the user is single heating, determining that the four-pipe system operates in a heating mode; if the cold and hot load requirements of the user are simultaneous cooling and heating, determining that the four-pipe system operates in a cold and hot combined mode;

and S23, controlling the operation of the four-control system according to the operation mode.

Optionally, the operation modes are respectively:

a cooling mode, wherein the first control valve 5, the first throttling component 8 and the third control valve 7 are controlled to be opened, and the second control valve 6 and the second throttling component 9 are controlled to be closed;

a heating mode in which the second throttling part 9, the first throttling part 8 and the second control valve 6 are controlled to be opened, and the first control valve 5 and the third control valve 7 are controlled to be closed;

in the combined cooling and heating mode, the second throttling means 9 and the third control valve 7 are controlled to be opened, and the first control valve 5, the second control valve 6 and the first throttling means 8 are controlled to be closed.

For example, in one particular regulatory control process:

in the cooling mode, the first control valve 5 is opened, the second control valve 6 is closed, the third control valve 7 is opened, the first throttling part 8 is opened, and the second throttling part 9 is closed; the refrigerant at the air outlet of the compressor 1 enters the air-cooled heat exchanger 4 through the first control valve 5, then enters the cold water heat exchanger 3 through the first throttling part 8 and the third control valve 7, and finally returns to the air suction port of the compressor 1.

In the heating mode, the first control valve 5 is closed, the second control valve 6 is opened, the third control valve 7 is closed, the second throttling part 9 is opened, and the first throttling part 8 is opened; the refrigerant at the air outlet of the compressor 1 enters the hot water heat exchanger 2, then enters the air-cooled heat exchanger 4 through the second throttling part 9 and the first throttling part 8, and then returns to the air suction port of the compressor 1 through the second control valve 6.

In the combined cooling and heating mode, the first control valve 5 is closed, the second control valve 6 is closed, the third control valve 7 is opened, the first throttling part 8 is closed, and the second throttling part 9 is opened; the refrigerant at the air outlet of the compressor 1 firstly flows into the hot water heat exchanger 2, then flows into the cold water heat exchanger 3 through the second throttling part 9 and the third control valve 7, and finally returns to the air suction port of the compressor 1.

The operation mode is a cold and hot combined supply mode, and when the refrigerating capacity needs to be reduced independently, the first throttling component 8 is controlled to be opened and the initial opening of the opening value is controlled, the air-cooled heat exchanger 4 and the second control valve 6 are opened, and the opening of the first throttling component 8 is adjusted according to the target water temperature at the cold water side of the cold water heat exchanger 3.

Optionally, adjusting the opening degree of the first throttling element 8 according to the target water temperature at the cold water side of the cold water heat exchanger 3 includes:

detecting the actual water temperature of the cold water side of the cold water heat exchanger 3;

comparing the actual water temperature of the cold water side with the target water temperature of the cold water side;

the opening degree of the first throttling member 8 is adjusted according to the comparison result.

Optionally, adjusting the opening of the first throttling element 8 according to the comparison result includes:

if the actual water temperature of the cold water side is lower than the target water temperature of the cold water side, the opening degree of the first throttling part 8 is adjusted and increased;

if the actual water temperature at the cold water side is higher than the target water temperature at the cold water side, the opening degree of the first throttling component 8 is adjusted to be reduced;

if the actual cold water side temperature is equal to the target cold water side temperature, the opening degree of the first throttling member 8 is maintained.

Alternatively, the adjusting and increasing of the opening degree of the first throttling element 8 comprises:

gradually adjusting and increasing the opening degree of the first throttling component 8 according to a preset proportion or step length, and after the target opening degree obtained after the preset proportion or step length is adjusted each time lasts for a preset time, judging whether the actual water temperature of the cold water side is equal to the target water temperature of the cold water side;

and determining whether to continuously adjust the opening of the electronic expansion valve according to the judgment result.

Alternatively, the adjusting and reducing of the opening degree of the first throttling element 8 comprises:

gradually regulating and reducing the opening degree of the first throttling component 8 according to a preset proportion or step length, and judging whether the actual water temperature of the cold water side is equal to the target water temperature of the cold water side or not after the target opening degree obtained after the preset proportion or step length is regulated each time lasts for a preset time;

The determining whether to continuously adjust the opening degree of the electronic expansion valve according to the judgment result includes:

when the judgment result indicates that the actual water temperature on the cold water side is not equal to or lower than the target water temperature on the cold water side, the opening degree of the first throttling component 8 is determined to be continuously adjusted and increased;

when the judgment result indicates that the actual water temperature on the cold water side is not equal to or higher than the target water temperature on the cold water side, the opening degree of the first throttling component 8 is determined to be continuously adjusted and reduced;

when the judgment result indicates that the actual cold water side water temperature is equal to the target cold water side water temperature, it is determined to stop adjusting the opening degree of the first throttling part 8.

It should be noted that, when the opening of the first throttling element 8 is adjusted, the temperature of the hot water side is also detected, the compressor 1 is used for loading and unloading according to the temperature of the hot water side, and finally, the actual temperature of the cold water side is ensured to be equal to the target temperature of the cold water side while the actual temperature of the hot water side is ensured to be equal to the target temperature of the hot water side.

Optionally, before the opening of the first throttling element 8 is adjusted according to the target water temperature of the cold water side of the cold water heat exchanger 3, the compressor 1 is controlled to be loaded or unloaded to meet the requirement of the hot water side of the hot water heat exchanger 2, that is, the refrigerating capacity is considered to be reduced under the condition that the requirement of the heating side is preferentially met.

As shown in fig. 6, a specific regulation control process is performed when the cooling capacity needs to be reduced separately during the combined cooling and heating operation. The first electronic expansion valve is opened to an initial opening degree X (the value of X is suggested to be 1% -5%), a fan of the air-cooled heat exchanger 4 and the second control valve 6 are synchronously opened, the air-cooled heat exchanger 4 is used as a bypass evaporator, and a part of throttled refrigerant is bypassed. The first throttling element 8 controls according to the target water temperature of the cold water side, and when the actual water temperature of the cold water side is lower than the target water temperature of the cold water side, the actual water temperature of the cold water side is increased by 1% until the actual water temperature of the cold water side is equal to the target water temperature of the cold water side; when the actual water temperature at the cold water side is higher than the target water temperature at the cold water side, the water temperature is reduced by 1% until the first throttling component 8 is closed, and then the compressor 1 is used for regulating the water temperature.

If the heating quantity is increased independently, the heating requirement is met by loading the compressor 1, and then the refrigerating quantity is reduced by the actions to meet the requirement that the refrigerating quantity is not changed.

The embodiment of the utility model provides an in, the operational mode is cold and hot confession mode, and when needing to reduce the heating capacity alone, controls first throttle part 8 and opens and open the initial aperture of value, and air-cooled heat exchanger 4 and first control valve 5 are opened to the aperture of the first throttle part 8 of hot water side target temperature adjustment according to hot water heat exchanger 2.

Optionally, adjusting the opening degree of the first throttling element 8 according to the target water temperature at the hot water side of the hot water heat exchanger 2 includes:

detecting the actual water temperature of the hot water side of the hot water heat exchanger 2;

comparing the actual water temperature of the hot water side with the target water temperature of the hot water side;

Optionally, adjusting the opening degree of the first throttling element 8 according to the comparison result includes:

if the actual water temperature at the hot water side is lower than the target water temperature at the hot water side, the opening degree of the first throttling part 8 is adjusted to be reduced;

if the actual water temperature at the hot water side is higher than the target water temperature at the hot water side, the opening degree of the first throttling part 8 is adjusted and increased;

if the actual water temperature on the hot water side is equal to the target water temperature on the hot water side, the opening degree of the first throttling member 8 is maintained.

gradually adjusting and reducing the opening of the first throttling component 8 according to a preset proportion or step length, and after the target opening obtained after the preset proportion or step length is adjusted each time lasts for a preset time, judging whether the actual water temperature on the hot water side is equal to the target water temperature on the hot water side;

gradually adjusting and increasing the opening degree of the first throttling component 8 according to a preset proportion or step length, and after the target opening degree obtained after adjusting the preset proportion or step length each time lasts for a preset time, judging whether the actual water temperature at the hot water side is equal to the target water temperature at the hot water side;

Optionally, determining whether to continuously adjust the opening degree of the electronic expansion valve according to the determination result includes:

when the judgment result indicates that the actual water temperature of the hot water side is not equal to or lower than the target water temperature of the hot water side, it is determined to continue to adjust and reduce the opening of the first throttling element 8;

when the judgment result indicates that the actual water temperature of the hot water side is not equal to or higher than the target water temperature of the hot water side, it is determined to continue adjusting and increase the opening degree of the first throttling element 8;

when the judgment result indicates that the actual water temperature on the hot water side is equal to the target water temperature on the hot water side, it is determined to stop adjusting the opening degree of the first throttling part 8.

It should be noted that when the opening of the first throttling element 8 is adjusted, the water temperature of the cold water side is also detected, the compressor 1 is used for loading and unloading according to the water temperature of the cold water side, and finally, the actual water temperature of the cold water side is ensured to be equal to the target water temperature of the cold water side while the actual water temperature of the hot water side is ensured to be equal to the target water temperature of the hot water side.

Optionally, before the opening of the first throttling element 8 is adjusted according to the target water temperature on the hot water side of the hot water heat exchanger 2, the compressor 1 is controlled to be loaded or unloaded to meet the water temperature requirement on the cold water side of the cold water heat exchanger 3, that is, the heating capacity is reduced under the condition that the cooling side requirement is preferentially met.

As shown in fig. 7, a specific regulation control process is performed when the heating capacity needs to be reduced individually for the combined cooling and heating operation. The first throttling component 8 is opened, the first throttling component is opened to an initial opening X (the value of X is suggested to be 1% -5%), a fan of the air-cooled heat exchanger 4 and the first control valve 5 are synchronously opened, the air-cooled heat exchanger 4 is used as a bypass condenser, and a bypass part exhausts. The first throttling part 8 controls according to the target water temperature of the hot water side, when the actual water temperature of the hot water side is lower than the target water temperature of the hot water side, the water temperature is reduced by 1%, when the actual water temperature of the hot water side is higher than the target water temperature of the hot water side, the water temperature is increased by 1%, and the compressor 1 is used for adjusting the water temperature until the first throttling part 8 is closed.

If the condition of increasing the refrigerating capacity alone appears, need satisfy the air demand of refrigeration through compressor 1 loading earlier, rethread above-mentioned action reduces the demand that the refrigerating capacity is unchangeable that satisfies.

Based on a general utility model conceive, the embodiment of the utility model provides a still provide a controlling means of four management systems.

Fig. 8 is a schematic structural diagram provided by an embodiment of the control device of the four-pipe control system of the present invention, referring to fig. 8, a control device of the four-pipe control system may include: the device comprises an acquisition module, a determination module and a control module.

An obtaining module 31, configured to obtain a cold and heat load demand of a user;

a determining module 32, configured to determine an operation mode of the four-pipe system according to a cooling and heating load demand of a user;

and the control module 33 is used for controlling the operation of the four-control system according to the operation mode.

In an embodiment of the present invention, the determining module 32 includes:

the first detection unit is used for detecting the actual water temperature of the cold water side of the cold water heat exchanger 3;

and the first adjusting unit is used for adjusting the opening degree of the first throttling component 8 according to the comparison result of the actual water temperature of the cold water side and the target water temperature of the cold water side.

Optionally, the determining module 32 further includes:

the second detection unit is used for detecting the actual water temperature of the hot water side of the hot water heat exchanger 2;

and a second adjusting unit for adjusting the opening degree of the first throttling part 8 according to the comparison result of the actual water temperature of the hot water side and the target water temperature of the hot water side.

With regard to the apparatus in the above embodiment, the specific manner in which each module performs the operation has been described in detail in the embodiment related to the method, and will not be described in detail here.

The embodiment of the utility model provides a controlling means of four pipe system systems through utilizing conventional control valve (solenoid valve) on-off control just can realize all functions of four control, including refrigeration, heat, the demand of cold and hot antithetical couplet confession switches and realizes cold and hot independent regulation when the heat supply of cooling simultaneously to adapt to user's actual demand, cancelled the use of cross valve, effectually avoided the cross valve action to exist the card easily and die, case damage failure risk such as refrigerant leakage, and then promoted the stability and the reliability of unit operation.

Based on a general utility model design, the embodiment of the utility model provides an still provide an air conditioner.

Fig. 9 is a schematic structural diagram provided by an embodiment of the air conditioner of the present invention, referring to fig. 9, the air conditioner of this embodiment may include: the four-pipe system is connected with the controller; the controller is used for executing the control method of the four-pipe control system.

It is understood that the same or similar parts in the above embodiments may be mutually referred to, and the same or similar parts in other embodiments may be referred to for the content which is not described in detail in some embodiments.

The above embodiments are only specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily think of changes or substitutions within the technical scope of the present invention, and all should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims

1. A four-pipe system is characterized by comprising a compressor, wherein a first control valve, an air-cooled heat exchanger, a first throttling part, a third control valve, a cold water heat exchanger and an air suction port of the compressor are sequentially connected along an air outlet of the compressor to form a refrigeration loop;

the hot water heat exchanger, the second throttling part, the first throttling part, the air cooling heat exchanger, the second control valve and the air suction port of the compressor are sequentially connected along the air exhaust port of the compressor to form a heating loop;

2. The four-pipe system of claim 1, wherein the first control valve, the second control valve, and the third control valve are all one-way solenoid valves, wherein:

3. The four-pipe system of claim 1, wherein the first throttling component and the second throttling component are both electronic expansion valves.

4. The four-pipe system according to claim 1, wherein a cold water temperature sensor is installed at a water outlet end of the cold water heat exchanger, and the cold water temperature sensor is used for detecting the temperature of cold water side outlet water.

5. The four-pipe system according to claim 1, wherein a hot water temperature sensor is mounted at each water outlet end of the hot water heat exchanger, and the hot water temperature sensor is used for detecting the temperature of the outlet water at the hot water side.

6. The four-tube system of claim 1, wherein the hot water heat exchanger and the cold water heat exchange are both fin heat exchangers.

7. A four-pipe system control device according to any one of claims 1 to 6, comprising:

8. The control device of a four-pipe system according to claim 7, wherein the determination module comprises:

9. The control device of a four-pipe system according to claim 8, wherein the determination module further comprises:

10. An air conditioner characterized by comprising the four-pipe system according to any one of claims 1 to 6, and/or the control device of the four-pipe system according to any one of claims 7 to 9.