JP2013178019A - Air conditioner that has cooling tower - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an air conditioner capable of enhancing degree of supercooling of refrigerant than that obtained by an outdoor heat exchanger and a tower water-refrigerant heat exchanger.SOLUTION: An air conditioner includes a main path 5 through which a compressor 6, an indoor heat exchanger 13, and an outdoor heat exchanger 8 are connected for flowing refrigerant, a TR (tower water-refrigerant) heat exchanger 3 which performs heat exchange between tower water that flows a cooling tower 4 and the refrigerant, a bypass route 111 which branches from the main path 5 to return the refrigerant to the compressor 6, and an SC expansion valve 112 which is provided on the bypass route 111. It further includes a supercooler 11 which causes the refrigerant flowing the bypass route 111 to expand so that the refrigerant flowing the main path 5 is cooled, and a switching mechanism 10 which switches over the main path 5 between the outdoor heat exchanger 8 and the indoor heat exchanger 13, to be a first path in which the TR heat exchanger 3 is displaced on the upper stream of the supercooler 11 during cooling operation or to be a second path in which the TR heat exchanger 3 is disposed on the lower stream of the supercooler 11 during the cooling operation.

Description

  The present invention relates to an air conditioner having a cooling tower.

  Patent Document 1 discloses an air conditioner having a cooling tower. As shown in FIG. 1 and the paragraph 0027, the air conditioner includes a tower water-refrigerant heat exchanger that exchanges heat between the tower water cooled by the cooling tower and the refrigerant. The tower water-refrigerant heat exchanger is disposed downstream of the outdoor heat exchanger and functions as a refrigerant subcooler.

JP 2006-284083 A

  The supercooling by the outdoor heat exchanger and the tower water-refrigerant heat exchanger may have insufficient cooling capacity and may not be able to cope with the cooling load. Then, this invention provides the air conditioner which can make the supercooling degree of a refrigerant | coolant larger than the supercooling degree obtained by an outdoor heat exchanger and a tower water-refrigerant heat exchanger.

  An air conditioner having a cooling tower according to the present invention is an air conditioner having a cooling tower. A tower water-refrigerant heat exchanger that exchanges heat with the refrigerant, a bypass path that branches from the main path and returns the refrigerant to the compressor, and an expansion valve that expands the refrigerant flowing through the bypass path And a heat exchanger that exchanges heat between the expanded refrigerant and the refrigerant flowing through the main path, and the subcooler, and the outdoor heat exchanger and the indoor heat exchanger The main path is a first path in which the tower water-refrigerant heat exchanger is arranged upstream of the supercooler in the cooling operation, or the tower water-refrigerant heat exchanger is supercooled in the cooling operation. Of the second path positioned downstream, it comprises a switching mechanism for switching, a.

  In the air conditioner, the switching mechanism passes through the main path between the outdoor heat exchanger and the indoor heat exchanger through the first path, the second path, or the subcooler and Switch to the third path that does not pass through the tower water-refrigerant heat exchanger.

  In the air conditioner, the switching mechanism includes a first four-way valve and a second four-way valve, and the first four-way valve uses the outdoor heat exchanger as the tower water-refrigerant heat exchanger and the subcooler. And the other of the tower water-refrigerant heat exchanger and the subcooler is connected to the second four-way valve, and the second four-way valve connects the indoor heat exchanger to the tower water-refrigerant. One of the heat exchanger and the supercooler is connected, and the other of the tower water-refrigerant heat exchanger and the supercooler is connected to the first four-way valve.

  The air conditioner includes a pressure detector that detects a pressure of the refrigerant between the compressor and the outdoor heat exchanger, and a first control device that controls the switching mechanism based on the pressure. When the pressure is equal to or higher than a predetermined upper limit pressure, the first control device causes the switching mechanism to select the first path, and when the pressure is lower than the predetermined upper limit pressure, the first control is performed. The apparatus causes the switching mechanism to select the second path.

  An air conditioner having a cooling tower according to the present invention is an air conditioner having a cooling tower. A tower water-refrigerant heat exchanger that exchanges heat with the refrigerant, a bypass path that branches from the main path and returns the refrigerant to the compressor, and an expansion valve that expands the refrigerant flowing through the bypass path And a supercooler comprising: a heat exchanger that exchanges heat between the expanded refrigerant and the refrigerant flowing through the main path, and the tower water-refrigerant heat exchanger and the supercooler. The cooler is disposed in the main path between the outdoor heat exchanger and the indoor heat exchanger.

  The air conditioner which concerns on this invention can make the supercooling degree of a refrigerant | coolant larger than the supercooling degree obtained by an outdoor heat exchanger and a tower water-refrigerant heat exchanger.

FIG. 1 is a block diagram of an air conditioner. FIG. 2 is a block diagram of the air conditioner showing the flow of the refrigerant in the condensing operation. FIG. 3 is a block diagram of the air conditioner showing the refrigerant flow in the supercooling utilization operation. FIG. 4 is a block diagram of the air conditioner showing the flow of the refrigerant in the heating operation. FIG. 5 is a block diagram of the air conditioner. FIG. 6 is a block diagram of the air conditioner.

(Configuration of the first embodiment)
With reference to FIGS. 1-4, the air conditioner which concerns on 1st Embodiment is demonstrated.

  FIG. 1 is a block diagram of an air conditioner. The air conditioner includes a refrigerant circuit 1, a tower water circuit 2, and a tower water-refrigerant heat exchanger (TR heat exchanger) 3. The refrigerant circuit 1 is a heat pump that circulates refrigerant. The tower water circuit 2 includes a cooling tower 4 that cools the tower water, and the tower water circulates in the tower water circuit 2. The TR heat exchanger 3 performs heat exchange between the tower water and the refrigerant.

  The refrigerant circuit 1 includes a main path 5, a compressor 6, a four-way valve 7, an outdoor heat exchanger 8, an outdoor expansion valve 9, a switching mechanism 10, a supercooler 11, an indoor expansion valve 12, an indoor heat exchanger 13, and a liquid pipe. A joint 14, a gas pipe joint 15, a discharge pressure sensor 16, a controller 17, and an operating device 18 are provided. The switching mechanism 10 includes a first four-way valve 101 and a second four-way valve 102.

  The main path 5 includes a discharge path 51, a suction path 52, a TR path 53, a connection path 54, and an RR path 55. The discharge path 51 and the suction path 52 connect the compressor 6 and the four-way valve 7. The discharge path 51 sends out the refrigerant from the compressor 6 to the four-way valve 7. The suction path 52 returns the refrigerant from the four-way valve 7 to the compressor 6. The TR path 53, the connection path 54, and the RR path 55 connect the first four-way valve 101 and the second four-way valve 102. The TR heat exchanger 3 is disposed on the TR path 53. The subcooler 11 is disposed on the RR path 55.

  The compressor 6 causes the refrigerant to flow through the main path 5.

  The four-way valve 7 is an operation switching mechanism that switches the direction of the refrigerant flowing through the main path 5 to the cooling direction DC or the heating direction DH. The four-way valve 7 connects the discharge path 51 and the outdoor heat exchanger 8 and connects the suction path 52 and the indoor heat exchanger 13 in the cooling operation. At this time, the refrigerant flows through the main path 5 in the cooling direction DC. The four-way valve 7 connects the discharge path 51 and the indoor heat exchanger 13 and connects the suction path 52 and the outdoor heat exchanger 8 in the heating operation. At this time, the refrigerant flows through the main path 5 in the heating direction DH.

  The outdoor heat exchanger 8 is disposed outdoors and performs heat exchange between the outside air and the refrigerant. The outdoor heat exchanger 8 includes an outdoor fan 8a. The outdoor expansion valve 9 is disposed between the outdoor heat exchanger 8 and the first four-way valve 101, and expands the refrigerant flowing to the outdoor heat exchanger 8 in the heating operation.

  The indoor heat exchanger 13 is disposed indoors and performs heat exchange between the indoor air and the refrigerant. The outdoor heat exchanger 8 includes an indoor fan 13a. The indoor expansion valve 12 is disposed between the indoor heat exchanger 13 and the second four-way valve 102, and expands the refrigerant flowing through the indoor heat exchanger 13 in the cooling operation.

  The liquid pipe joint 14 and the gas pipe joint 15 connect the main path 5 belonging to the outdoor side and the main path 5 belonging to the indoor side. The liquid pipe joint 14 is located between the second four-way valve 102 and the indoor expansion valve 12. The gas pipe joint 15 is located between the indoor heat exchanger 13 and the four-way valve 7.

  The switching mechanism 10 switches the main path 5 between the outdoor heat exchanger 8 and the indoor heat exchanger 13 to the first path, the second path, or the third path. Both the first route and the second route include a TR route 53, a connection route 54, and an RR route 55. The order of connecting the routes 53, 54, and 55 is changed between the first route and the second route. The first path arranges the TR heat exchanger 3 upstream of the subcooler 11 in the cooling direction DC. The second path arranges the TR heat exchanger 3 downstream of the subcooler 11 in the cooling direction DC. The third route includes only the RR route 55. The third path passes through the subcooler 11 and does not pass through the TR heat exchanger 3.

  The switching mechanism 10 includes the first four-way valve 101 and the second four-way valve 102 as described above. Each of the first four-way valve 101 and the second four-way valve 102 has the same configuration as the four-way valve 7. The first four-way valve 101 connects the outdoor heat exchanger 8 to one of the TR heat exchanger 3 and the subcooler 11, and connects the other of the TR heat exchanger 3 and the subcooler 11 to the second four-way valve 102. To do. The second four-way valve 102 connects the indoor heat exchanger 13 to one of the TR heat exchanger 3 and the subcooler 11, and connects the other of the TR heat exchanger 3 and the subcooler 11 to the first four-way valve 101. To do.

  The subcooler 11 branches from the main path 5 and returns the refrigerant to the compressor 6. The SC expansion valve 112 expands the refrigerant flowing through the bypass path 111. The expanded refrigerant and the refrigerant flowing through the main path 5. SC heat exchanger 113 that exchanges heat with the other. The subcooler 11 cools the refrigerant flowing through the main path 5 by expanding the refrigerant flowing through the bypass path 111. That is, the supercooler 11 cools the remaining refrigerant sent to the evaporator by using a part of the refrigerant sent from the condenser to the evaporator.

  The discharge pressure sensor 16 detects the pressure of the refrigerant passing through the discharge path 51.

  The tower water circuit 2 includes a main path 20, a tower water pump 21, a sprinkler 22, a filler 23, and a water tank 24. The TR heat exchanger 4 is disposed on the main path 20 and is located between the tower water pump 21 and the water sprinkler 22. The cooling tower 4 includes a water sprinkler 22, a filler 23, and a water tank 24.

  The controller 17 includes a compressor 6, a four-way valve 7, an outdoor fan 8 a, an outdoor expansion valve 9, a switching mechanism 10 (first four-way valve 101 and second four-way valve 102), an SC expansion valve 112 of the supercooler 11, indoor expansion. The valve 12, the indoor fan 13a, and the tower water pump 21 are controlled.

  The operation device 18 inputs a command for operating the air conditioner to the controller 17 based on an operation by the user.

  The operation of the air conditioner will be described with reference to FIG. The air conditioner can perform a cooling operation and a heating operation. The cooling operation includes a condensing use operation and a supercooling use operation.

  The TR heat exchanger 3 and the subcooler 11 cool the refrigerant in the cooling operation. Since condensation and supercooling occur due to the cooling of the refrigerant, the TR heat exchanger 3 and the supercooler 11 can function as a condenser and a supercooler, like the outdoor heat exchanger 8. However, since the subcooler 11 cools the remaining liquid refrigerant by expanding a part of its own liquid refrigerant with the SC expansion valve 112, the subcooler 11 can be maintained in order to maintain the cooling performance of the subcooler 11. 11 is required to be completely liquefied. That is, the supercooler 11 is not suitable for a pure condenser. On the other hand, the TR heat exchanger 3 cools the refrigerant using the tower water cooled by the cooling tower 4. For this reason, the TR heat exchanger 3 is suitable for both a condenser and a subcooler. Therefore, when the condensation of the refrigerant in the outdoor heat exchanger 8 is incomplete, the air conditioner passes the refrigerant to the TR heat exchanger 3 next to the outdoor heat exchanger 8 and then to the subcooler 11. Let it pass. Specifically, the controller 17 causes the switching mechanism 10 to select the first path, and arranges the outdoor heat exchanger 8, the TR heat exchanger 3, and the subcooler 11 in this order along the main path 5. That is, the TR heat exchanger 3 is used as a condenser. This is the condensation utilization operation shown in FIG. On the contrary, when the condensation of the refrigerant in the outdoor heat exchanger 8 is complete, the air conditioner passes the refrigerant to the subcooler 11 next to the outdoor heat exchanger 8 and then to the TR heat exchanger 3. Let it pass. Specifically, the controller 17 causes the switching mechanism 10 to select the second path, and arranges the outdoor heat exchanger 8, the subcooler 11, and the TR heat exchanger 3 in this order along the main path 5. That is, the TR heat exchanger 3 is used as a supercooler. This is the supercooling utilization operation shown in FIG. In addition, when the condensation of the refrigerant in the outdoor heat exchanger 8 is complete, there is a case where the supercooling by the second path is more efficient than the supercooling by the first path. For this reason, when the condensation of the refrigerant in the outdoor heat exchanger 8 is complete, the second path is set to be selected.

  Whether or not the condensation of the refrigerant in the outdoor heat exchanger 8 is complete is specified as follows. When liquefaction of the refrigerant in the outdoor heat exchanger 8 is insufficient, the state of the refrigerant is a state in which the gas refrigerant is mixed with the liquid refrigerant. In this case, the refrigerant pressure in the main path 5 from the compressor 6 to the outdoor heat exchanger 8 is unlikely to decrease. For this reason, whether or not the condensation is complete is specified based on the magnitude of the refrigerant pressure. When the refrigerant pressure is equal to or higher than the predetermined upper limit pressure, the condensation is incomplete, and when the refrigerant pressure is less than the upper limit pressure, the condensation is complete. This refrigerant pressure is detected by a discharge pressure sensor (pressure detector) 16. When execution of the cooling operation is instructed, the controller 17 (first control device) selects the condensing use operation or the supercooling use operation based on the detected refrigerant pressure.

  FIG. 2 is a block diagram of the air conditioner showing the flow of the refrigerant in the condensing operation. Since the condensation use operation is a cooling operation, the four-way valve 7 connects the discharge path 51 and the outdoor heat exchanger 8, and connects the suction path 52 and the indoor heat exchanger 13. Further, the opening of the outdoor expansion valve 9 is maintained at the maximum opening so that the indoor expansion valve 12 expands the refrigerant, and the opening of the indoor expansion valve 12 is maintained at a predetermined minute opening. In the condensation use operation, the switching mechanism 10 selects the first path. Further, the opening of the SC expansion valve 112 is maintained at a predetermined minute opening so that the SC expansion valve 112 expands the refrigerant. For this reason, the refrigerant passes through the TR heat exchanger 3 and the subcooler 11 in order from the outdoor heat exchanger 8 and flows to the indoor expansion valve 12 and the indoor heat exchanger 13. A part of the refrigerant flows from the subcooler 11 to the suction path 52. The refrigerant is condensed in the outdoor heat exchanger 8 and the TR heat exchanger 3 and is supercooled in the subcooler 11.

  FIG. 3 is a block diagram of the air conditioner showing the refrigerant flow in the supercooling utilization operation. Since the supercooling utilization operation is a cooling operation, the four-way valve 7 connects the discharge path 51 and the outdoor heat exchanger 8, and connects the suction path 52 and the indoor heat exchanger 13. Further, the opening of the outdoor expansion valve 9 is maintained at the maximum opening so that the indoor expansion valve 12 expands the refrigerant, and the opening of the indoor expansion valve 12 is maintained at a predetermined minute opening. In the supercooling utilization operation, the switching mechanism 10 selects the second path. Further, the opening of the SC expansion valve 112 is maintained at a predetermined minute opening so that the SC expansion valve 112 expands the refrigerant. For this reason, the refrigerant passes through the subcooler 11 and the TR heat exchanger 3 in order from the outdoor heat exchanger 8 and flows to the indoor expansion valve 12 and the indoor heat exchanger 13. A part of the refrigerant flows from the subcooler 11 to the suction path 52. The refrigerant is condensed in the outdoor heat exchanger 8 and is supercooled in the supercooler 11 and the TR heat exchanger 3.

  In the first embodiment, the controller 17 performs switching between the condensing use operation and the supercooling use operation based on the refrigerant pressure detected by the discharge pressure sensor 16. Instead of this configuration, the user may manually switch between the condensing operation and the supercooling operation without using the detected value of the refrigerant pressure and the control of the controller 17. The user causes the switching mechanism 10 to select the first route or the second route by operating the operation device 18. The user determines switching between the condensing use operation and the supercooling use operation based on the use conditions such as the design performance of the air conditioner and the temperature environment to be used.

  FIG. 4 is a block diagram of the air conditioner showing the flow of the refrigerant in the heating operation. In the heating operation, the four-way valve 7 connects the discharge path 51 and the indoor heat exchanger 13, and connects the suction path 52 and the outdoor heat exchanger 8. Moreover, the opening degree of the indoor expansion valve 12 is kept at the maximum opening degree, and the opening degree of the outdoor expansion valve 9 is kept at a predetermined minute opening degree so that the indoor expansion valve 12 expands the refrigerant. Further, the switching mechanism 10 selects the third route. In the heating operation, the supercooling between the indoor heat exchanger 13 and the outdoor heat exchanger 8 does not affect the amount of heat exchanged in the indoor heat exchanger 13. For this reason, the opening degree of the SC expansion valve 112 is kept at the maximum opening degree so that the supercooler 11 does not function. Moreover, the operation of the tower water circuit 2 is stopped. In the winter season, the tower water in the water tank 24 is also discharged. For this reason, the refrigerant flows from the indoor heat exchanger 13 through the supercooler 11 to the outdoor expansion valve 9 and the outdoor heat exchanger 8. The refrigerant is condensed and subcooled in the indoor heat exchanger 13.

(Configuration of Second Embodiment)
With reference to FIG. 5, an air conditioner according to the second embodiment will be described. FIG. 5 is a block diagram of the air conditioner. The air conditioner according to the second embodiment does not include the switching mechanism 10, and the main path 5 between the outdoor heat exchanger 8 and the indoor heat exchanger 13 is determined as the first path. For this reason, the air conditioner according to the second embodiment can execute only the condensation use operation as the cooling operation. Further, since switching between the condensing use operation and the supercooling use operation is not executed, the discharge pressure sensor 16 is not provided, and the controller 17 does not execute the corresponding control. Other points are the same between the first embodiment and the second embodiment.

(Configuration of Third Embodiment)
The air conditioner according to the third embodiment will be described with reference to FIG. FIG. 6 is a block diagram of the air conditioner. The air conditioner according to the third embodiment does not include the switching mechanism 10, and the main path 5 between the outdoor heat exchanger 8 and the indoor heat exchanger 13 is determined as the second path. For this reason, the air conditioner according to the third embodiment can execute only the supercooling utilization operation as the cooling operation. Further, since switching between the condensing use operation and the supercooling use operation is not executed, the discharge pressure sensor 16 is not provided, and the controller 17 does not execute the corresponding control. Other points are the same between the first embodiment and the third embodiment.

(Effect of this embodiment)
The air conditioner which concerns on this embodiment has the following effect by the above-mentioned structure.

(1) The air conditioner according to the first embodiment includes a main path 5, a TR heat exchanger (tower water-refrigerant heat exchanger) 3, a supercooler 11, and a switching mechanism 10.

  The refrigerant is cooled by the outdoor heat exchanger 8, the TR heat exchanger 3, and the supercooler 11. For this reason, the air conditioner according to the first embodiment can make the supercooling degree of the refrigerant larger than the supercooling degree obtained by the outdoor heat exchanger 8 and the TR heat exchanger 3.

  The switching mechanism 10 changes the order in which the refrigerant passes through the TR heat exchanger 3 and the subcooler 11. Here, the condensation capacity in the first path is superior to the condensation capacity in the second path. When the condensation is performed incompletely, the supercooler 11 does not function well, and the cooling capacity decreases. For this reason, when the condensation in the outdoor heat exchanger 8 is performed incompletely, the air conditioning capability in the first path is higher than the air conditioning capability in the second path. On the other hand, due to usage conditions such as the design performance and temperature environment of the air conditioner, the supercooling capacity in the second path may be higher than the supercooling capacity in the first path. When condensation in the outdoor heat exchanger 8 is completely performed under such use conditions, the air conditioning capability in the second path is higher than the air conditioning capability in the first path. For this reason, the air conditioner which concerns on 1st Embodiment can ensure air conditioning capability to the maximum by switching a 1st path | route and a 2nd path | route according to a condition.

(2) In the air conditioner according to the first embodiment, the switching mechanism 10 can select the first route, the second route, or the third route.

  For this reason, the air conditioner according to the first embodiment can execute not only the cooling operation but also the heating operation.

(3) The switching mechanism 10 includes a first four-way valve 101 and a second four-way valve 102.

  The switching mechanism 10 is configured by diverting a four-way valve used for switching between cooling and heating. For this reason, the air conditioner according to the first embodiment can reduce the cost required for the switching mechanism 10.

  When the switching mechanism 10 only selects the first path or the second path, the switching mechanism 10 may be configured using two three-way valves instead of the two four-way valves.

(4) The air conditioner according to the first embodiment includes a discharge pressure sensor (pressure detector) 16 and a controller (first control device) 17 that controls the switching mechanism 10 based on the refrigerant pressure.

  When the condensation is completely performed, the pressure increase is suppressed, but when the condensation is performed incompletely, the pressure is increased. Switching between the first path and the second path is executed so that the pressure does not exceed a predetermined upper limit pressure. That is, when the possibility that the condensation in the outdoor heat exchanger 8 is incomplete is high, the first path is automatically selected, and when the possibility that the condensation in the outdoor heat exchanger 8 is complete is high, Two routes are automatically selected. For this reason, the air conditioner according to the first embodiment can ensure the maximum air conditioning capacity.

(5) The air conditioner according to the first to third embodiments includes a main path 5, a TR heat exchanger (tower water-refrigerant heat exchanger) 3, and a supercooler 11.

  The refrigerant is cooled by the outdoor heat exchanger 8, the TR heat exchanger 3, and the supercooler 11. For this reason, the air conditioner according to the first to third embodiments can make the supercooling degree of the refrigerant larger than the supercooling degree obtained by the outdoor heat exchanger 8 and the tower water-refrigerant heat exchanger 3.

3 TR heat exchanger (tower water-refrigerant heat exchange)
4 Cooling tower 5 Main path 6 Compressor 8 Outdoor heat exchanger 10 Switching mechanism 11 Subcooler 13 Indoor heat exchanger 16 Discharge pressure sensor (pressure detector)
17 Controller (first control device)
101 First four-way valve 102 Second four-way valve 111 Bypass path 112 SC expansion valve

Claims (5)

In an air conditioner with a cooling tower,
A main path for connecting the compressor, the indoor heat exchanger, and the outdoor heat exchanger, and flowing the refrigerant;
A tower water-refrigerant heat exchanger for exchanging heat between the tower water flowing through the cooling tower and the refrigerant;
Heat is generated between a bypass path that branches from the main path and returns the refrigerant to the compressor, an expansion valve that expands the refrigerant that flows through the bypass path, and the expanded refrigerant and the refrigerant that flows through the main path. A subcooler comprising: a heat exchanger for exchanging;
In the main path between the outdoor heat exchanger and the indoor heat exchanger, in the cooling operation, the first path in which the tower water-refrigerant heat exchanger is arranged upstream of the subcooler, or in the cooling operation An air conditioner having a cooling tower, comprising: a switching mechanism that switches to a second path in which the tower water-refrigerant heat exchanger is disposed downstream of the supercooler.   The switching mechanism passes through the main path between the outdoor heat exchanger and the indoor heat exchanger through the first path, the second path, or the subcooler, and the tower water-refrigerant heat. The air conditioner which has a cooling tower of Claim 1 which switches to the 3rd path | route which does not pass an exchanger. The switching mechanism includes a first four-way valve and a second four-way valve,
The first four-way valve connects the outdoor heat exchanger to one of the tower water-refrigerant heat exchanger and the subcooler, and connects the other of the tower water-refrigerant heat exchanger and the subcooler to the Connected to the second four-way valve,
The second four-way valve connects the indoor heat exchanger to one of the tower water-refrigerant heat exchanger and the supercooler, and connects the other of the tower water-refrigerant heat exchanger and the subcooler to the The air conditioner which has a cooling tower of Claim 1 or 2 connected to a 1st four-way valve. A pressure detector for detecting a pressure of the refrigerant between the compressor and the outdoor heat exchanger;
A first control device that controls the switching mechanism based on the pressure,
When the pressure is equal to or higher than a predetermined upper limit pressure, the first control device causes the switching mechanism to select the first path,
The air conditioner having a cooling tower according to any one of claims 1 to 3, wherein the first control device causes the switching mechanism to select the second path when the pressure is lower than a predetermined upper limit pressure. In an air conditioner with a cooling tower,
A main path for connecting the compressor, the indoor heat exchanger, and the outdoor heat exchanger, and flowing the refrigerant;
A tower water-refrigerant heat exchanger for exchanging heat between the tower water flowing through the cooling tower and the refrigerant;
Heat is generated between a bypass path that branches from the main path and returns the refrigerant to the compressor, an expansion valve that expands the refrigerant that flows through the bypass path, and the expanded refrigerant and the refrigerant that flows through the main path. A heat exchanger for exchanging, and a supercooler comprising:
The air conditioner having a cooling tower, wherein the tower water-refrigerant heat exchanger and the supercooler are arranged in the main path between the outdoor heat exchanger and the indoor heat exchanger.

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