JP2003314846A - Air conditioning system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an air conditioning system having an indoor unit for reliably processing dew condensation water even when an installation place of the unit is changed to a place except a wall, so as to reconcile hot air floor blow off type heating and cooling in summer. <P>SOLUTION: The air conditioning system comprises an indoor unit 37 having a heat exchanger 35, a drain receiver 54 for receiving the dew condensation water on a surface of the heat exchanger 35, a drainage pump 53 for discharging the dew condensation water to the outside of a room, and flexible piping 34 for supplying a low temperature heating medium to the indoor unit 37. Even when installed on a floor for heating or on a higher position for cooling, the air conditioning system expands the degree of freedom in installation and secures comfort by forcibly discharging the dew condensation water with the drainage pump 53. <P>COPYRIGHT: (C)2004,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an air conditioning system for heating and cooling a general house or office by adding a cooling function to a warm air heating device that blows warm air for heating.

[0002]

2. Description of the Related Art Conventionally, various heating devices have been used in ordinary houses and offices. Among them, a heating device of a type that blows warm air by using hot water as a heat source has high capacity and high temperature. Since it can blow out warm air, it can be used in general because it has sufficient capacity and a feeling of heating even in cold regions and semi-cold regions, has a relatively small indoor installation space, and is safe and clean. It is spreading on the ground.

A hot air heater of this type is generally known as shown in FIG. The configuration will be described below with reference to FIG. As shown in the figure, an outdoor unit 4 including a systern 1, a boiler 2 and a pump 3.
Is connected by a connection pipe 8 to an indoor unit 7 composed of a heat exchanger 5 arranged above and a blower 6 arranged below. Further, a suction port 9 is provided at the upper part of the indoor unit 7,
An outlet 10 is provided at the bottom. Reference numeral 11 indicates a room temperature detecting means.

The operation of this warm air heater will be described. When the boiler 2 of the outdoor unit 4 operates and the temperature of the hot water sent to the indoor unit 7 by the pump 3 reaches a predetermined temperature or higher, the blower 6 operates. When the operation is started, the air in the room is sucked in through the suction port 9 provided in the upper part of the indoor unit 7 installed on the floor,
It is heated by exchanging heat with hot water in the heat exchanger 5 and becomes hot air, which is blown out from the blowout port 10 provided at the lower portion. Then, when the suction temperature detected by the room temperature detecting means 11 becomes equal to or higher than the set temperature, the blower 6 is stopped, and when it becomes low, the blower 6 is restarted to control the indoor temperature.
Furthermore, in order to control the ability, reduce noise, and prevent the feeling of airflow,
Depending on the difference between the suction temperature detected by the room temperature detection means 11 and the set temperature, the air volume is reduced as the suction temperature approaches the set temperature, such as strong wind, weak wind, and light wind.

Further, a heat pump type heating / cooling device using Freon (for example, R-22) or the like as a heat medium without using hot water is generally widely used. In this type of air conditioner, an indoor unit is installed on the wall or ceiling so that the temperature distribution during cooling is improved and the feet do not get cold, and a type that blows cold air from a high place on the wall or near the ceiling is used. Mainstream. As for switching the upper and lower blowouts of this wall-mounted air conditioner, there is one described in Japanese Patent Publication No. 61-38777. In this air conditioner, as shown in FIGS. 7A and 7B, a suction port 9 is formed on the front surface of the indoor unit 7, and further, a lower air outlet 10A and an upper air outlet 10B are formed on the lower and upper portions of the front surface, respectively. . A heat exchanger 5 is provided at a position facing the suction port 9, and a blower 6 is provided corresponding to the heat exchanger 5. Further, the lower damper 12A and the upper damper 12B provided corresponding to the lower outlet 10A and the upper outlet 10B are switched by a damper motor 13 serving as outlet switching means.

The operation of this air conditioner will be described. When the room temperature is equal to or lower than the set temperature during heating, the damper motor 13 operates and, as shown in FIG. 7a, the lower damper 1
2A is used to open the lower outlet 10A, upper damper 12B is used to close the upper outlet 10B, and hot air is blown from the lower outlet 10A. Further, when the indoor temperature becomes equal to or higher than the set temperature, as shown in FIG. 7B, the damper motor 13 operates and the lower damper 12A closes the lower outlet 10A,
The upper blower outlet 10B is opened by the upper damper 12B, and blown air is blown from the upper blower outlet 10B to convect warm air. During the cooling operation, when the indoor temperature is relatively high, the cool air is blown out from the lower outlet 10A to cool rapidly, and when the indoor temperature is in a stable state based on the set value, the indoor blower 6 is driven by a slight wind operation. The air is blown out from the upper air outlet 10B so as not to cool the feet.

[0007]

However, since the above-mentioned conventional hot-air heating device is exclusively for heating, a separate cooling device is required when it is desired to perform cooling, and in a side-by-side system combined with cooling by a room air conditioner or the like. However, the construction becomes very complicated, which is very disadvantageous in terms of construction cost. Further, when cooling water is circulated in the heat exchanger 5 so that cooling can be performed, condensed water adheres to and is generated in the heat exchanger 5. Therefore, with this configuration, the condensed water cannot be processed and the cooling operation is performed. I can't. Indoor unit 7 for treating condensed water
When installing the drainage pipe on the wall and draining condensed water to the outside using the head, the height of the installation site is limited due to the height difference with the outdoor drainage site, and the floor surface The cold air blown out from the blowout port 10 of the indoor unit 7 cools only at the feet, and when it is installed at a high position on the wall surface, the hot air at the time of heating rises immediately after being blown and becomes cold at the feet. Therefore, in such a configuration, there is a problem that the installation freedom is lost and the heating feeling and the cooling feeling are impaired.

On the other hand, in the other conventional air conditioner using the Freon R-22 shown in FIG. 7, the operating pressure of the refrigerant circuit is limited, so that the hot air temperature during heating can be set to 70 ° C. or higher. Not only is it difficult to obtain a sufficient feeling of heating, but the air volume was reduced as the intake temperature of the room temperature approached the set temperature, so warm air from a relatively high position on the wall quickly rose, The temperature distribution was bad and my feet were cold.

FIG. 8 is a perspective view of the space of the room in which the indoor unit 7 is installed, and FIG. 9 shows the temperature distribution in the plane A of FIG. FIG. 10 shows the distribution of the averages of the horizontal temperatures at the respective heights of the B and C planes of FIG. The alternate long and short dash line is the average temperature of the entire room. As can be seen from both figures, when the air volume becomes small, such as a weak wind or a light breeze, the temperature of the warm air rises and immediately rises. Further, since the suction port 9 is located above the blowout port 10, the warm air level rises. Since it does not return to the floor surface, it is warm near the hot air heater and near the ceiling, but the temperature is low elsewhere. Therefore, there is a problem that the comfortable living space is small and the entire room cannot be effectively used.

In order to solve this problem, if the air volume is increased, the temperature of the air blown is further lowered, and there is a feeling of air flow, a feeling of cold air, and noise is increased, so that comfort is impaired. As described above, if the indoor unit installation position is fixed to a high place on the wall as in the conventional air conditioner, it is difficult to achieve both comfort during heating operation and during cooling operation.

Further, in the conventional air conditioner using the Freon R-22 or the like, if only a plurality of indoor units are added, a phenomenon called so-called stagnation occurs in which the heat medium stays in the indoor units that are not in operation. The amount of the heat medium circulated in the heat pump circuit greatly changes, causing performance deterioration and failure. And an air conditioner called a mulch that can add more indoor units is equipped with a valve device to prevent stagnation and controls according to operating conditions, etc., making the device complicated and very disadvantageous in terms of cost, etc. There was also a problem that it was not possible to easily add more indoor units.

The present invention provides an air conditioning system having both an indoor unit for reliably treating condensed water even if the installation location is changed in addition to the wall surface, while achieving both high temperature hot air floor heating and summer cooling. That is the purpose.

[0013]

SUMMARY OF THE INVENTION In order to solve the above problems, the present invention provides a heat exchanger for supplying a low temperature heat medium to cool the inside of a room, and receiving condensed water condensed on the surface of the heat exchanger. An indoor unit having a drain receiver for collecting and a drainage pump for discharging condensed water in the drain receiver to the outside of the room, and a flexible pipe for supplying a low-temperature heat medium to the indoor unit.

According to the above-mentioned invention, it is possible to realize the heating of the hot air blown on the floor surface and the cooling in the summer in which one indoor unit can obtain a sufficient feeling of heating. In addition, since it is not necessary to fix the installation location of the indoor unit to the wall surface to treat the dew condensation water, the installation location can be changed according to each operation of heating or cooling, increasing the installation flexibility and It is possible to provide an air conditioning system having an indoor unit with a compact space.

[0015]

BEST MODE FOR CARRYING OUT THE INVENTION The present invention has the following constitution in order to solve the above problems. That is, as the first configuration,
A heat exchanger that supplies a low-temperature heat medium to cool the room, a drain receiver that collects condensed water that has condensed on the surface of the heat exchanger, and a drainage pump that discharges the condensed water in the drain receiver to the outside of the room The indoor unit has and a flexible pipe for supplying a low-temperature heat medium to the indoor unit.

[0016] Further, the heating of the hot air floor surface blowout which provides a sufficient heating feeling and the cooling in the summer can be realized by one indoor unit, and the installation place of the indoor unit is fixed to the wall surface for treating the condensed water. Since there is no need to do so, it is possible to change the installation location according to each operation of heating or cooling, which increases the degree of freedom of installation and makes the installation space compact.

As a second configuration, a heat exchanger for supplying cold water as a low-temperature heat medium to cool the interior of the room, a drain receiver for collecting the condensed water condensed on the surface of the heat exchanger, and the drain receiver. The indoor unit is provided with an ejector for discharging the dew condensation water inside the room to the outside. Further, it is possible to realize a configuration in which the condensed water can be discharged out of the room with a simple configuration and at a relatively low cost. It is also possible to prevent the reduction of cold water due to evaporation.

As a third structure, there is provided an indoor unit which can be installed on the floor and is provided with an upper outlet, a lower outlet, and switching means for switching the upper and lower sides of the outlet. Then, high-temperature air is blown along the floor surface during heating, and cold air is blown toward the ceiling during cooling, so that the comfort of the indoor unit having a large degree of freedom in installation can be improved.

As a fourth structure, a room which can be connected to and detached from a heat medium outlet provided with a condensed water discharge port and a heat medium supply port and installed on the wall surface of a house by a pipe having heat insulation and flexibility. It has a unit. Depending on the purpose of the user, one indoor unit can be moved to any room with a heat medium outlet, and it can be used as a living room during the day and a bedroom at night, which improves convenience and makes it possible to use various rooms. Air conditioning can be realized at low cost. In addition, since it can be removed from the heat medium outlet and stored when not needed, convenience is improved even in an indoor installation space.

The fifth structure has an indoor unit provided with a branch supply port for the heat medium. Further, it is possible to easily add an indoor unit.

As a sixth structure, a heat pump circuit having a compressor, a condenser, a pressure reducing means and an evaporator, and a heat medium for supplying water to an indoor unit having a cistern, a pump and a boiler are used as the evaporator. With a water circuit that exchanges heat with the refrigerant in the heat pump circuit to cool it
The evaporator is provided between a plurality of refrigerant channel plates having slit-shaped holes, a plurality of water supply channel plates having slit-shaped holes, and between the plurality of refrigerant channel plates and the water supply channel plates. In addition, it is configured by a laminated heat exchanger in which a flow path for the refrigerant and the water supply is formed from the refrigerant and a plurality of partition plates that form the partition for the water supply. Further, since the pressure loss of the water circuit can be reduced, the flow rate of cold water can be increased, and an air conditioning system that can easily increase the cooling capacity in the indoor unit can be provided. Furthermore, a cold water supply function can be added compactly without increasing the size of the hot water supply device.

As a seventh configuration, an indoor unit having an overflow drain port provided in the cistern, a heat exchanger, a drain receiver, and an ejector for discharging condensed water is provided. In addition, since the reduction of cold water due to evaporation is prevented, the replenishment work of circulating water can be omitted, and even if there is a large inflow of dew condensation water, the water exceeding the specified amount is automatically drained, so maintenance is unnecessary. Become.

[0023]

Embodiments of the present invention will now be described in detail with reference to the drawings.

(Embodiment 1) FIG. 1 is a block diagram of an air conditioning system showing an indoor unit in an upper blowing state of Embodiment 1 of the present invention, and FIG. 2 shows an indoor unit in a lower blowing state of the air conditioning system. It is a cross-sectional block diagram. 1, a cistern 21, a pump 22, a boiler 23 connected in parallel, a bypass pipe 25 having a solenoid valve 24, and a water circuit 27 configured by sequentially connecting an evaporator 26, a compressor 28, and a condenser. 29, a pressure reducing means 30, and a heat pump circuit 31 configured by sequentially connecting the evaporator 26,
An outdoor unit 32 configured to exchange heat between the water flowing through the water circuit 27 and the refrigerant in the heat pump circuit 31 in the evaporator 26.
Is connected to the heat exchanger 3 by a flexible connection pipe 34 having a heat insulating property via a water outlet 33 which is a heat medium outlet.
5, connected to an indoor unit 37 composed of a blower 36, etc., and detachable by a water outlet 33. The indoor unit 37 is provided with a downward blowing inlet 38 on the upper back side and an upper blowing inlet 39 on the lower back side. Further, a lower outlet 40 is provided below the front surface of the indoor unit 37. Also, 41
Is switching means of the wind circuit, and this switching means 41
Is the casing 42 of the blower 36 and the rotary shaft 4 of the blower 36.
3 is rotated about the center to switch the blower circuits for the upper and lower blowers. Further, the bypass wind circuit 44 provided above the blower 36 and on the front side of the heat exchanger 35 is a blower passage that does not pass through the heat exchanger 35 during upward blowing. In addition, the upper outlet 4 that blows out the air that has passed through the heat exchanger 35 is provided above the indoor unit 37.
5 and a bypass outlet 46 that blows out the air that does not pass through the heat exchanger 35. Further, the wind direction changing means 47 includes an upper outlet 45 and a bypass outlet 46.
The upper wind direction changing vane 48 and the bypass wind direction changing vane 49 respectively provided in and are driven. The shielding means 50 provided on the back surface of the indoor unit 37 shields the downward blowing inlet 38 during upward blowing, and the shielding means 50 moves up and down as shown in FIG. And a shield plate drive means 52 for driving the shield plate 51. A drainage pump 53 is provided in the indoor unit 37, and the suction side of the drainage pump 53 is the heat exchanger 3.
5 is connected to the inside of a drain receiver 54 provided on the lower side, and the discharge side is connected to a drain hose 56 provided outside the room from a drainage passage 55 provided integrally with the flexible connection pipe 34.

FIG. 3 is a perspective view showing a state in which the indoor unit of the air conditioning system according to the first embodiment of the present invention is added, and FIG. 4 is an exploded view of the evaporator 26 of the air conditioning system. In FIG. 3, reference numeral 57 denotes a branch portion of water which is a heat medium provided inside the indoor unit 37, one of the branch portions 57 is connected to the heat exchanger 35, and the other is connected to a branch supply port 58 provided at the exterior portion. It is connected. The branch supply port 58 has substantially the same shape as the female side of the male / female water outlet 33, and the male side outlet 60 of the floor panel 59 which is another indoor unit.
The floor panel 5 which is connected with the water and the water is added to the indoor unit 37.
9 can be supplied in parallel.

In FIG. 4, a laminated heat exchanger 61 configured as the evaporator 26 is formed by forming a refrigerant plate 62, a water supply plate 63, and a partition plate 64 inserted between the plates 62, 63 in the normal layers. ing. Refrigerant plate 6
2, a coolant slit 62a and a water supply slit 62b, which are slit-shaped holes, are formed in the coolant slit 62.
a forms a coolant channel by being sandwiched between the partition plate 64 and the top plate or the partition plate 64. The water supply plate 63 is provided with a coolant slit 63a and a water supply slit 63b, which are slit-shaped holes, and the water supply slit 63b is sandwiched by the partition plate 64 to form a water flow path. The water supply slits 62b of the coolant plate 62, the coolant slits 64a and 64b of the partition plate 64, and the coolant slits 63a of the water supply plate 63 are holes provided to send the coolant or water to each of the plates to be layered. is there. A top plate 65 is arranged on the uppermost surface of the plates laminated in the normal layer, and an end plate 66 is arranged on the lowermost surface.

Next, the operation and action will be described. As shown in FIG. 1, when performing the heating operation in the indoor unit 37 installed on the floor surface, as shown in FIG. 2, the heating is performed in the downward blowing state. That is, the switching unit 41 rotates the casing 42 downward about the rotation shaft 43 of the blower 36, and the wind direction changing unit 47 closes the upper outlet 45 with the upper wind direction changing blade 48 and bypasses it with the bypass wind direction changing blade 49. The outlet 46 is closed, and the shield plate driving means 52 opens the lower blow inlet 38 to shield the shield plate 5.
The downward blowing state is set by moving 1 downward. Then, in the outdoor unit 32, the water pressure-fed by the pump 22 from the systern 21 is heated by the passage of the operating boiler 23 due to the closing of the solenoid valve 24 to become hot water, and after passing through the evaporator 26, the water outlet 33 of the water outlet 33 is discharged. It is sent to the indoor unit 37 through the flexible connection pipe 34 through the water supply port 67 which is a heat medium supply port. The hot water and the air sucked from the blower suction port 38 by the blower 36 exchange heat with the heat exchanger 35, and the sucked air is heated to become hot air and is blown out from the lower outlet 40. To be done. The temperature of the hot water supplied from the outdoor unit 32 is 75 when the temperature is high.
There is about 70 degrees Celsius, and the warm air heated by this rises to 70 degrees Celsius, but since it blows out from the lower outlet 40 along the floor surface, a sufficient heating feeling can be obtained and the warm air blown from above also causes discomfort. Instead, you can comfortably heat from your feet with hot air.

Next, when performing the cooling operation in the indoor unit installed on the floor, as shown in FIG. 1, the switching means 4 is used.
1, the casing 42 is rotated upward around the rotation shaft 43 of the blower 36, and the wind direction changing means 47 operates the upper changing vanes 48 to open the upper blowing port 45.
Further, the shield plate driving means 52 is provided with the downward blowing suction port 38.
The upper blowing state is set by moving the shielding plate 51 upward in order to close. On the other hand, in the outdoor unit, the refrigerant in the heat pump circuit 31 passes through the pressure reducing means 30 and is cooled by the operation of the compressor 28 and enters the evaporator 26. The water pumped from the cistern 21 by the pump 22 is the solenoid valve 2
By opening No. 4, heat is exchanged with the refrigerant cooled in the evaporator 26 through the bypass pipe 25, so that cold water is generated here. The cold water passes through the water supply port 67 of the water outlet 33, the flexible connection pipe 34, and the heat exchanger 35 of the indoor unit 37. Then, the air sucked by the blower 36 from the upper blowing inlet 39 is cooled by the heat exchanger 35 and blown out from the upper blowing outlet 45, thereby cooling the room. At this time, the moisture contained in the air is condensed by the cooling in the heat exchanger 35, and the heat exchanger 3
Water droplets are generated on the surface of No. 5. The water droplets of the condensed water eventually grow and flow into the drain receiver 54 provided below the heat exchanger 35 by gravity. Since the condensed water collected in the drain receiver 54 is pumped up by the drainage pump 53 and pumped to the drainage channel 55 side, the flexible pipe 34 and the drainage channel 55 are bent depending on the installation condition of the indoor unit 37. However, the dew condensation water is sent to the dew condensation water discharge port 68 provided in the water outlet 33, which is the connection destination of the drainage channel 55, and is discharged to the outside through the drain hose 56 connected thereto. In this way, the dew condensation water during cooling can be discharged regardless of the installation state of the indoor unit 37, so that the cooling operation can be performed without any problem even when installed on the floor.

Further, when performing the upward blowing operation of the indoor unit 37, the wind direction changing means 47 operates the upper changing vane 48 and the bypass wind direction changing vane 49 to open the upper blowing port 45 and the bypass blowing port 46, respectively. It is configured to be able to. Then, a part of the air sucked by the blower 36 from the upper blowing inlet 39 is heat-exchanged by the heat exchanger 35 and blown out from the upper blowing outlet 45. On the other hand, the air sucked from the upper blowing suction port 39 by the blower 36 is not the same as the heat exchanger 3 described above.
Instead of passing through 5, the air is blown out from the bypass outlet 46 through the bypass air circuit 44. By this action,
When the indoor temperature reaches near the set temperature for the heating / cooling operation and the air conditioning load decreases, mild air conditioning operation can be performed.

As described above, it is possible to realize the heating of the hot air floor surface blowout and the cooling in the summer, which provide a sufficient feeling of heating, in one indoor unit, and the installation place of the indoor unit for treating the condensed water. Since there is no need to fix it to the wall surface, it is possible to change the installation location according to each operation of heating or cooling, which increases the degree of freedom of installation and makes the installation space compact. In addition, since it is possible to switch between upper and lower blowing according to the operating state, hot air is blown along the floor surface during heating, and cool air is blown toward the ceiling during cooling, providing a room with a high degree of freedom in installation. It is possible to improve comfort in the unit. Furthermore, according to the purpose of the user, one indoor unit can be moved to any room with a heat medium outlet, and it can be used as a living room during the day and a bedroom at night, improving convenience and improving the variety of rooms. Air conditioning can be realized at low cost. In addition, since it can be removed from the heat medium outlet and stored when not needed, convenience is improved even in an indoor installation space.

When it is desired to add an indoor unit as shown in FIG. 3, since the indoor unit 37 is provided with the branch supply port 58, connection / detachment can be easily performed, convenience is increased, and air conditioning is performed. Even if sufficient comfort cannot be obtained with one indoor unit, such as where hot and cold air is difficult to reach depending on the form of the room, the comfort can also be improved by the synergistic effect with the additional indoor unit. Although the floor panel 59 is used as the indoor unit to be added here, it is clear that the same effect can be obtained even if the same indoor unit 37 is added or another type of indoor unit is added. Is.

Further, as shown in FIG. 4, the laminated heat exchanger 6
Since the refrigerant flow path and the water supply flow path of No. 1 are formed by parallel flow paths in which a plurality of layers are stacked, the flow path cross-sectional area becomes large as a whole while ensuring a sufficient heat exchange area in each flow path. , The pressure loss is small. Therefore, since the pressure loss of the water circuit can be reduced, the flow rate of cold water can be increased, and an air conditioning system that can easily increase the cooling capacity in the indoor unit can be provided.

Further, the height of the refrigerant passage of the laminated heat exchanger 61 is the thickness of the refrigerant plate 62, and the width of the refrigerant passage is the width of the slit 62a. In this embodiment, the refrigerant plate 6 is adjusted so that the Reynolds number is 500 or less.
2 and the water supply plate 63 are designed to have a thickness of 0.1 to 1.0 mm and the slit 62a has a width of 2.0 to 15 mm.

Therefore, the state of the water supply flowing through the water supply passage becomes a laminar flow. Generally, laminar flow is considered to have low heat transfer. However, by reducing the flow path height as in the present invention, the heat transfer is promoted when the temperature boundary layer becomes thin. Further, by thinning the temperature boundary layer, it is possible to make the temperature distribution in the height direction of the feed water flowing through the feed water flow path uniform.

Further, the temperature of the main flow of the feed water flowing through the feed water flow path and the temperature of the feed water flowing along the wall surface are almost the same, so the feed water is locally cooled and the feed water is frozen in the heat exchanger. Without this, cold water can be generated with high efficiency.

Therefore, when cold water is required, the outdoor unit 32 is operated to instantaneously and continuously generate cold water as needed. Also,
Since the internal volume is smaller than conventional double-tube heat exchangers and plate heat exchangers, the amount of refrigerant to be filled can be reduced, and the device can be downsized without increasing the size of the hot water supply device. A cold water supply function can be added compactly.

In addition, a heat pump circuit 3 using a refrigerant
Since 1 is completed only in the outdoor unit 32 and does not guide the refrigerant of the heat pump circuit to the indoor unit, even if the heat pump circuit 31 is filled with a hydrocarbon-based refrigerant such as propane, which is flammable or explosive, It is possible to improve safety without leaking hydrocarbon refrigerant into the room.

(Embodiment 2) FIG. 5 is a block diagram of an air conditioning system of Embodiment 2 of the present invention. As shown in FIG. 5, an ejector 69, which is a device for sucking condensed water, is provided in the indoor unit 37, and a heat medium outlet side 70 of the heat exchanger 35 is connected to a nozzle portion 71 that constitutes the ejector 69. The suction part 72 of the ejector 69 is connected to the inside of the drain receiver 54 provided in the lower part of the heat exchanger 35, while the discharge part 73 is connected to the flexible connection pipe 34, and is connected to the outdoor unit 32 via the water outlet 33. ing. An overflow drainage port 74 is provided above the cistern 21 of the outdoor unit 32, and when the water level in the cistern 21 exceeds a predetermined position, the drainage is performed from a connected discharge pipe 75.

In the above structure, the dew condensation water adhering to the surface of the heat exchanger 35 during the cooling operation is gravitationally applied to the heat exchanger 3.
5 flows into a drain receiver 54 provided below The condensed water collected in the drain receiver 54 is sucked by the ejector 69, merges with the cold water that has passed through the heat exchanger 35 from the suction part 72, and the flexible connection pipe 34 from the discharge part 73.
No matter how the flexible pipe 34 is bent depending on the installation condition of the indoor unit 37, the condensed water is sent from the water outlet 33 to the systern 21 of the outdoor unit 32. In this way, since the condensed water during cooling can be discharged regardless of the installation condition of the indoor unit 37, the cooling operation can be performed without any problems even when installed on the floor, and the condensed water can be discharged outside the room with a simple structure and at a relatively low cost. It is possible to realize a structure that can be discharged. Further, it is possible to prevent the decrease of the circulating water in the cistern 21 due to evaporation by replenishing the dew condensation water, which makes it possible to omit the replenishment work of the circulating water, and when the inflow of the dew condensation water is large, the water exceeding the predetermined amount is not Since the water is automatically drained from the overflow drain port 74 to the drain pipe 75, maintenance is unnecessary.

[0040]

As described above, the air conditioning system of the present invention has the following effects.

That is, according to the invention of claim 1,
Since it is possible to realize the heating of the hot air floor surface blowout and the cooling in the summer with a single indoor unit that provides a sufficient feeling of heating, it is not necessary to fix the installation location of the indoor unit to the wall surface in order to treat the condensed water. The installation location can be changed according to each operation of heating or cooling, which increases the degree of freedom of installation and makes the installation space compact.

According to the second aspect of the present invention, it is possible to realize a structure in which the dew condensation water can be discharged outside the room with a simple structure and at a relatively low cost. It is also possible to prevent the reduction of cold water due to evaporation.

According to the third aspect of the present invention, the hot air is blown along the floor surface during heating, and the cool air is blown toward the ceiling during cooling, so that comfort in an indoor unit having a large degree of freedom in installation can be achieved. Can be improved.

According to the invention described in claim 4, one indoor unit can be moved to any room having a heat medium outlet according to the purpose of the user, such as a living room during the day and a bedroom at night. Since it can be used properly, convenience is improved and air conditioning of various rooms can be realized at low cost. In addition, since it can be removed from the heat medium outlet and stored when not needed, convenience is improved even in an indoor installation space.

According to the fifth aspect of the present invention, it is possible to easily add an indoor unit and increase convenience, and it is possible to improve comfort by synergistic effect with the added indoor unit.

Further, according to the invention of claim 6, the pressure loss of the water circuit can be reduced, so that the flow rate of cold water can be increased,
An air conditioning system that can easily increase the cooling capacity of an indoor unit can be provided. A cold water supply function can be added compactly without increasing the size of the hot water supply device.

Further, according to the invention of claim 7, since the reduction of cold water due to evaporation is prevented, the replenishment work of circulating water can be omitted, and when the inflow of dew condensation water is large, the amount of water exceeding the predetermined amount is exceeded. Is automatically drained, eliminating the need for maintenance.

[Brief description of drawings]

FIG. 1 is a configuration diagram of an air conditioning system showing an indoor unit in an upper blowing state according to a first embodiment of the present invention.

FIG. 2 is a cross-sectional configuration diagram of the indoor unit in a state where the air conditioner system is blown downward.

FIG. 3 is a perspective view showing an additional state of an indoor unit of the air conditioning system.

FIG. 4 is an exploded view of the evaporator of the air conditioning system.

FIG. 5 is a configuration diagram of an air conditioning system according to a second embodiment of the present invention.

FIG. 6 is a configuration diagram of an air conditioning system in a first conventional example.

FIG. 7 is a configuration diagram of an air conditioning system in a second conventional example.

FIG. 8 is a perspective view of a room for explaining the temperature distribution of the air conditioning system in the first conventional example.

FIG. 9 is an explanatory view of distribution of blowout temperature of the air conditioning system.

FIG. 10 is an explanatory diagram of vertical temperature distribution of the air conditioning system.

[Explanation of symbols]

21 Cistan 22 pumps 23 Boiler 26 Evaporator 27 Water circuit 28 compressor 29 condenser 30 decompression means 31 heat pump circuit 33 Water outlet (heat medium outlet) 34 Flexible connection piping 35 heat exchanger 37 Indoor unit 40 Bottom outlet 41 switching means 45 Upper outlet 53 drainage pump 54 Drain receiver 58 Branch supply port 61 Stacked heat exchanger 62 Refrigerant plate 62a Refrigerant slit 62b Water supply slit 63 Water plate 63a Refrigerant slit 63b Water supply slit 64 bulkhead plate 64a Refrigerant slit 64b Water supply slit 67 Water supply port (heat medium supply port) 68 Condensate outlet 70 ejectors 74 Overflow drain

Claims (7)

[Claims] 1. A heat exchanger for supplying a low-temperature heat medium to cool the interior of the room, a drain receiver for collecting the condensed water condensed on the surface of the heat exchanger, and discharging the condensed water in the drain receiver to the outside of the room. An air conditioning system that includes an indoor unit having a drainage pump that operates and a flexible pipe that supplies a low-temperature heat medium to the indoor unit. 2. A heat exchanger for supplying cold water as a low-temperature heat medium to cool the inside of the room, a drain receiver for collecting the condensed water condensed on the surface of the heat exchanger, and a condensed water inside the drain receiver for the outside. An air conditioning system having an indoor unit with an ejector that discharges the air to an air conditioner. 3. An air conditioning system having an indoor unit according to claim 1 or 2, which can be installed on a floor and is provided with an upper outlet, a lower outlet, and switching means for switching the upper and lower sides of the outlet. 4. A heat medium outlet provided with a dew condensation water discharge port and a heat medium supply port, which can be connected to and detached from a heat medium outlet installed on a wall surface of a house by a pipe having heat insulation and flexibility. An air conditioning system having the indoor unit according to claim 1. 5. An air conditioning system having an indoor unit according to claim 4, which is provided with a branch supply port for a heat medium. 6. A heat pump circuit having a compressor, a condenser, a pressure reducing means and an evaporator, and water, which is a heat medium to be supplied to an indoor unit and has a cistern, a pump and a boiler, as a refrigerant of the heat pump circuit in the evaporator. A water circuit that flows so as to be heat-exchanged and cooled, wherein the evaporator has a plurality of refrigerant channel plates having slit-shaped holes, a plurality of water supply channel plates having slit-shaped holes, and A laminated heat exchanger in which a flow path for the coolant and the supply water is formed by a plurality of partition plates that are provided between the plurality of coolant flow path plates and the water supply flow path plate and form partition walls for the coolant and the water supply.
Air conditioning system described in. 7. The air conditioning system according to claim 6, further comprising: an indoor unit having an overflow drain port provided in the cistern, a heat exchanger, a drain receiver, and an ejector for discharging condensed water.