JP2013152045A - Cooling device and cooling system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a cooling device and the like by which energy conservation can be further achieved.SOLUTION: A cooling device includes: a refrigeration circuit 6 configured to connect a compressor 1 compressing a refrigerant and whose capacity is variable, a water-cooling condenser 2 for heat-exchanging between the refrigerant and water, a throttle device 3 for adjusting the pressure of the refrigerant, and an evaporator 4 for cooling an object to be cooled by heat exchange of the refrigerant through piping; a water circulating pump 8 for supplying the water to the water-cooling condenser 2 and whose flow rate is variable; and a control device 17 for controlling a flow rate of the water supplied to the water-cooling condenser 2 by the water circulating pump 8 based on an operation load of the refrigerant circuit 6.

Description

  The present invention relates to a cooling device and the like that can be used for a freezer / refrigerated showcase or the like. In particular, the present invention relates to a cooling device that performs exhaust heat using water or the like.

  Conventionally, when the heat generated by a cooling device is exhausted to the outside of the room, an air-cooling type cooling system that exhausts heat directly to the outdoor air, and once indirectly indirectly to a medium such as water and then exhausted to the outdoor air. Heated water-cooled cooling systems are known.

  Here, in the cooling device, from the viewpoint of preventing global warming, efforts are being made to minimize the amount of refrigerant and to increase the efficiency of operation of the device. For example, the condenser of a refrigerator is installed in a room as a water-cooled condenser to minimize the amount of refrigerant, and a water circuit is configured by connecting a radiator and a water-cooled condenser installed outside in a cooling water pipe. There is a device that circulates water with a water circulation pump and discharges exhaust heat from the refrigerator to the outside (see, for example, Patent Document 1).

JP-A-11-108529 (FIG. 1)

  In the configuration of the cooling device using the water circuit as described above, the water circulation pump starts / stops simultaneously with the start (start of driving) / stop of the compressor. For this reason, for example, even when the compressor has a capacity control function such as an inverter control function, the water circulation pump is always driven at full speed while the compressor is being driven. I was consuming.

  The present invention has been made to solve the above-described problems, and an object of the present invention is to obtain a cooling device or the like that can further save energy.

  A cooling device according to the present invention includes a variable capacity compressor that compresses a refrigerant, a water-cooled condenser that exchanges heat between the refrigerant and water, a throttling device that adjusts the pressure of the refrigerant, and an evaporator that cools an object to be cooled by heat exchange of the refrigerant. The flow rate of water supplied to the water-cooled condenser by the water circulation pump is controlled based on the refrigerant circuit configured by connecting the pipes, the variable-flow water circulation pump for supplying water to the water-cooled condenser, and the operation load of the refrigerant circuit. And a control device.

  Since the cooling device of the present invention is configured as described above and performs the cooling operation, the water circulation pump is loaded on the operating load of the cooling device equipped with a compressor having a capacity control function such as an inverter control function. In addition, the capacity can be controlled and the flow rate can be varied, so that energy can be saved. Moreover, the effect that the contribution to global warming prevention can be achieved simultaneously is acquired.

It is a figure which shows the structure of the cooling system in Embodiment 1 of this invention. It is a figure which shows the flow of a process of the controller 17 which concerns on Embodiment 1 of this invention. It is a figure which shows the power consumption by control of the cooling device 11 which concerns on Embodiment 1 of this invention. It is a figure which shows the structure of the cooling system in Embodiment 2 of this invention. It is a figure which shows the specific structural example of the cooling device 11 in Embodiment 2 of this invention.

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

Embodiment 1 FIG.
FIG. 1 is a diagram showing a configuration of a cooling system according to Embodiment 1 of the present invention. The cooling system according to the present embodiment includes a cooling device 11, a radiator 14 and the like. For example, a cooling device 11 such as a cooling showcase or a cooling storage shown in FIG. 1 is installed in a store, a low-temperature working room of a factory, or the like. On the other hand, the radiator 14 and the like are provided, for example, outdoors. Here, in this Embodiment, it has the two cooling devices 11 (refrigerant circuit 6).

  In FIG. 1, a cooling device 11 according to the present embodiment includes a compressor 1 having a capacity control function, a four-way valve 5, a water-cooled condenser 2, a throttling device 3, and an evaporator 4 connected in a ring shape with a refrigerant pipe, and a refrigerant circuit. 6 is constituted. Here, one refrigerant circuit 6 is configured by one cooling device 11, but a plurality of refrigerant circuits 6 may be configured by one cooling device 11, for example.

  The compressor 1 sucks the refrigerant in the refrigerant circuit 6, compresses the refrigerant, and discharges it in a high temperature and high pressure state. The present embodiment includes, for example, a compressor 1 of a type that has an inverter circuit and can perform capacity control by changing the rotation speed. The water-cooled condenser 2 exchanges heat between the water circulating in the water circuit 10 and the refrigerant flowing in from the compressor 1 to condense and liquefy the high-temperature and high-pressure refrigerant, transfer heat from the refrigerant to water, and add water. Heat exchanger to be heated. The water-cooled condenser 2 is composed of, for example, a double tube heat exchanger, a plate heat exchanger, or the like. Here, in order to reduce the amount of the refrigerant in the refrigerant circuit 6, it is desirable to configure the plate type heat exchanger with a small internal volume on the side through which the refrigerant passes.

  The expansion device 3 decompresses the refrigerant. Here, as the expansion device 3, for example, a flow rate control means capable of variably controlling the opening degree and controlling the flow rate of the refrigerant passing therethrough, such as an electronic expansion valve, is optimal. For example, a capillary tube, an expansion valve, etc. The refrigerant flow rate adjusting means may be used. Here, in order to reduce the amount of refrigerant in the refrigerant circuit 6, it is desirable to configure the electronic expansion valve with good controllability even with a certain amount of refrigerant. The evaporator 4 performs heat exchange between the refrigerant in the refrigerant circuit 6 and the air sent from the evaporator blower 7, moves the heat from the air to the refrigerant, and cools the air in the space to be cooled. The evaporator blower 7 is a blower for sending the air in the space to be cooled to be the heat exchange target to the evaporator 4. The four-way valve 5 is provided, for example, when the refrigerant flow is made to flow in the opposite direction to the normal operation when performing a defrosting operation for removing frost attached to the evaporator 4 with a high-temperature refrigerant discharged from the compressor 1. . For this reason, when performing defrosting of the evaporator 4 with a heater etc., for example, it is not necessary to comprise the four-way valve 5.

  In the refrigerant circuit 6, during the cooling operation (normal operation), the refrigerant is circulated in the direction of the solid line in FIG. Further, during the defrosting operation, the four-way valve 5 is switched to circulate the refrigerant in the reverse cycle in the direction of the broken line in FIG. Here, as the refrigerant circulating in the refrigerant circuit 6, for example, tetrafluoropropene such as R410A, R32, R404A, 2,3,3,3-tetrafluoropropene (HFO1234yf) or a mixed refrigerant containing this tetrafluoropropene, propane, Isobutane, carbon dioxide, ammonia, air or the like is used.

  Further, the water circuit 10 is configured by connecting a water circulation pump 8 having a variable flow rate in the cooling device 11, a motor-operated valve 9 for condenser and a water-cooled condenser 2, a motor-operated valve 16 for radiator and a radiator 14 by water pipes, This circuit circulates water. Here, the water in the present embodiment and the like is a fluid that does not change its state even when heat is exchanged with a refrigerant, such as an antifreeze liquid. In the present embodiment, among the devices constituting the water circuit 10, each cooling device 11 includes the water circulation pump 8, the condenser motor-operated valve 9, and the water-cooled condenser 2. For this reason, in this Embodiment, the water circulation pump 8 and the electric motor 9 for condensers are provided corresponding to each refrigerant circuit 6, and it is connected in parallel with the flow of the water of the water circuit 10. Become. Then, the cooling device 11 is connected to the water pipe outside the device through the inlet water pipe connection port 12 and the outlet water pipe connection port 13. Here, in the water circuit 10 in the present embodiment, a plurality of combinations (two sets in the present embodiment) of the radiator 14, the radiator fan 15, and the radiator motor-operated valve 16 are parallel to the water circuit 10. Connected to.

  The water circulation pump 8 with a variable flow rate pressurizes the water in the water circuit 10 and transfers it in the water circuit 10. The present embodiment includes, for example, an inverter circuit, and includes a water circulation pump 8 of a type that can change the flow rate by changing the rotation speed. The condenser motor operated valve 9 is an open / close device that can variably control the opening degree and can control the flow rate of water passing through the water-cooled condenser 2. The radiator motor-operated valve 16 serving as a radiator flow rate adjusting device is a flow rate control unit that can control the opening degree variably and control the flow rate of water passing through the radiator 14. The radiator 14 performs heat exchange between the water flowing through the water circuit 10 and the air sent from the radiator blower 15 to move the heat from the water to the air around the radiator to cool the water. The radiator blower 15 serving as a fluid supply unit is a blower that sends outdoor (outside the space to be cooled) air to the radiator 14. In the present embodiment, an example is shown in which heat is dissipated from the outdoor air as a fluid by the blower 15 for heat radiator, but heat is dissipated from the water outside the water circuit 10 as a fluid using, for example, a pump (not shown). You may make it do.

  The controller 17 is a controller that controls devices such as the compressor 1, the condenser electric valve 9, and the water circulation pump 8 in the cooling device 11. In the present embodiment, a controller 17 is provided for each cooling device 11 (refrigerant circuit 6). In order to control each refrigerant circuit 6 (controller 17) in cooperation, each is connected by a communication line etc., and communication (signal transmission / reception) is enabled. In the present embodiment, one controller 17 is a parent controller 17. The parent-side controller 17 performs control to adjust the opening degree of each radiator motor-operated valve 16. Details of the control in the controller 17 will be described later.

  Next, the operation during the cooling operation (normal operation) in the refrigerant circuit 6 will be described. First, the compressor 1 sucks the refrigerant, compresses the refrigerant, discharges the refrigerant in a high temperature / high pressure state, and causes the refrigerant to flow into the water-cooled condenser 2 through the four-way valve 5. The water-cooled condenser 2 performs heat exchange between the water supplied from the water circulation pump 8 and the refrigerant, and condenses and liquefies the refrigerant in the refrigerant circuit 6. The refrigerant that has flowed out of the water-cooled condenser 2 flows into the expansion device 3. The expansion device 3 depressurizes the condensed and liquefied refrigerant. The refrigerant that has passed through the expansion device 3 flows into the evaporator 4. The evaporator 4 exchanges heat between the refrigerant in the refrigerant circuit 6 and the air in the cooling target space sent from the evaporator blower 7 to evaporate the refrigerant and cool the air in the space to be cooled. The refrigerant flowing out of the evaporator 4 is sucked into the compressor 1 through the four-way valve 5.

  Furthermore, the operation | movement at the time of the cooling operation of the water circuit 10 is demonstrated based on the flow of the water of the water circuit 10. FIG. When the corresponding refrigerant circuit 6 is operating, the water circulation pump 8 sucks and pressurizes water to transfer it. Water flows into the water-cooled condenser 2 through the condenser motor-operated valve 9. In the water-cooled condenser 2, the refrigerant and water exchange heat. Thereby, heat moves from the refrigerant to the water, and the water is heated (heated). The water heated in the water-cooled condenser 2 flows into the radiator 14 through the radiator motor-operated valve 16. In the radiator 14, the outdoor air and water sent from the radiator fan 15 exchange heat. Thereby, heat moves from water to the air around the radiator, thereby cooling the water. Here, in the present embodiment, a plurality of radiator motor-operated valves 16, radiators 14, and radiator fans 15 are provided and can be operated / stopped individually. Moreover, the heat dissipation capacity in each radiator 14 can be varied.

  FIG. 2 is a diagram showing a flow of processing relating to control by the controller 17 according to Embodiment 1 of the present invention. Next, the control of the controller 17 will be described with reference to FIG. Each controller 17 determines whether the compressor 1 having an inverter control function is started or not started (stopped) (S1). And if it judges that it will start, the motor valve 9 for condensers to be controlled will be opened, and the water circulation pump 8 will be driven (S2). Here, when the condenser motor-operated valve 9 has already been opened and the water circulation pump 8 has been driven, the operation continues.

  On the other hand, if it is determined not to be activated, the condenser motor-operated valve 9 is closed and the water circulation pump 8 is stopped (S3). For example, if the corresponding condenser motor operated valve 9 is open even though the compressor 1 is stopped, the water flows backward due to the driving of the other water circulation pump 8, thereby generating unnecessary pump power and saving energy. It is because it will inhibit. By providing a water circulation pump 8 corresponding to each refrigerant circuit 6 and stopping the water circulation pump 8 corresponding to the refrigerant circuit 6 being stopped, it is possible to avoid increasing the circulation power of water more than necessary. It can save energy.

  Then, during the cooling operation by the refrigerant circuit 6 by driving the compressor 1, it is determined whether or not the cooling load in the refrigerant circuit 6 is larger than the cooling capacity of the cooling device 11 (S4). If it is determined that the cooling load is larger than the cooling capacity of the cooling device 11, the rotation speed of the compressor 1 is increased to increase the cooling capacity. Further, the number of rotations of the water circulation pump 8 is increased to increase the flow rate (S5).

  If it is determined that the cooling load in the refrigerant circuit 6 is not larger than the cooling capacity of the cooling device 11, it is further determined whether or not the cooling load in the refrigerant circuit 6 is smaller than the cooling capacity of the cooling device 11 (S6). If it is determined that the cooling load is smaller than the cooling capacity of the cooling device 11, the number of rotations of the compressor 1 is decreased and the cooling capacity is decreased. Further, the rotational speed of the water circulation pump 8 is decreased to decrease the flow rate (S7). Here, the opening of the condenser motor operated valve 9 may be adjusted in accordance with the change in the rotational speed of the water circulation pump 8.

  Furthermore, in this Embodiment, according to the sum total flow volume of the water circulation pump 8 corresponding to the some refrigerant circuit 6, the opening degree of each radiator motor operated valve 16 is adjusted (S8). This process is performed by the parent controller 17. For example, when there are two cooling devices 11 (refrigerant circuit 6) as in the present embodiment, one of them stops, the total cooling load is 50%, and the total flow rate of the water circulation pump 8 is also the total flow rate. When one of the two radiator motor-operated valves 16 is closed, the radiator fan 15 is stopped. By closing the radiator motor-operated valve 16, the amount of water transferred by the water circulation pump 8 is reduced, so that the power consumption can be reduced.

  For example, when the installation locations of the two radiators 14 are different and the ambient temperature conditions are different, the opening degree of the radiator motor-operated valve 16 on the radiator 14 side having a lower ambient temperature is set to 100%, and the other radiator is used. The opening degree of the radiator-side motor operated valve 16 on the 14th side may be set to 0%. If it does in this way, it can thermally radiate efficiently and can achieve more energy saving. Moreover, it is good also considering the ratio of the opening degree of the two motor-operated valves 16 for radiators as 50%, respectively. And one opening can be 25% and the other can be 75%. For example, it is effective when the installation locations of the two radiators 14 are different and the heat dissipation ratio of one of the radiators 14 is increased and used for heating applications, heating applications, hot water supply applications, and the like. In this case, for example, it is possible to omit a heat source that is originally required for use, and energy can be saved accordingly. Moreover, you may make it reduce the rotation speed of the air blower 15 for radiators according to the opening degree of the electric valve 16 for radiators. By reducing the number of rotations of the radiator blower 15, further energy saving can be achieved.

  FIG. 3 is a diagram showing power consumption by the control of the cooling device 11 according to the first embodiment. For comparison, FIG. 3 shows power consumption by conventional control. In FIG. 3, when the cooling load in the cooling device 11 fluctuates, the power consumption in the two refrigerant circuits 6 and the power consumption in the cooling device 11 (= power consumption in the two refrigerant circuits 6 + power consumption in the water circulation pump 8) and Represents. For example, when the cooling load is 100%, the power consumption in the present embodiment is almost the same as the conventional power consumption.

  It can be seen that, in the case of a partial load with a cooling load of 50%, an energy saving effect appears in the compressor 1 having a capacity control function and the water circulation pump 8 having a variable flow rate. In the present embodiment, the water circulation pump 8 is provided for each of the plurality of cooling devices 11, and the water circulation pump 8 corresponding to the stopped refrigerant circuit 6 is stopped so that the circulation power of the water is increased. Since it can be made unnecessary, further energy saving can be achieved. Further, by closing one of the two radiator motor valves 16 (opening the radiator motor valve 16 of the radiator 14 having a lower ambient temperature), unnecessary water circulation power is reduced, and the power consumption of the water circulation pump 8 is reduced. Reduction can be achieved and energy saving can be achieved.

  Here, the operation | movement at the time of the defrost driving | operation of the cooling device 11 in this Embodiment is demonstrated further. When performing the defrosting operation, the four-way valve 5 switches the flow path so that the refrigerant in the refrigerant circuit 6 flows in the opposite direction to the normal operation. The compressor 1 sucks the refrigerant, compresses the refrigerant, discharges the refrigerant in a high temperature / high pressure state, and causes the refrigerant to flow into the evaporator 4 through the four-way valve 5. The evaporator 4 performs heat exchange between the adhering frost or ice and the refrigerant to condense and liquefy the refrigerant and to dissolve the frost and ice. The refrigerant that has flowed out of the evaporator 4 flows into the expansion device 3. The expansion device 3 depressurizes the condensed and liquefied refrigerant. The refrigerant that has passed through the expansion device 3 flows into the water-cooled condenser 2. The water-cooled condenser 2 exchanges heat between the water supplied from the water circulation pump 8 and the refrigerant, evaporates the refrigerant, and cools the water. The refrigerant that has flowed out of the water-cooled condenser 2 is sucked into the compressor 1 through the four-way valve 5.

  Furthermore, the operation | movement at the time of the defrost operation of the water circuit 10 is demonstrated based on the flow of the water of the water circuit 10. FIG. The water circulation pump 8 sucks and pressurizes the water in the water circuit 10 and transfers it. Water flows into the water-cooled condenser 2 through the condenser motor-operated valve 9. In the water-cooled condenser 2, the refrigerant and water exchange heat. As a result, heat is transferred from the refrigerant to the water, and the water is cooled. Although water flows through the radiator 14 by the transfer of the water circulation pump 8, it is assumed here that the water does not actively absorb heat particularly.

  Here, it is desirable to perform the plurality of refrigerant circuits 6 in order without simultaneously performing the defrosting operation. For example, since the water in the water circuit 10 is cooled during the defrosting operation, if the defrosting operation is performed at the same time, the water temperature falls below the dew point temperature, which may cause a dew problem in the water pipe. Further, when the temperature is further lowered, there is a risk that the water freezes and the water pipes and the like are damaged. For this reason, when water may freeze, in order to prevent freezing puncture, it is better to drive the water circulation pump 8 at the maximum speed during the defrosting operation.

  As described above, in the cooling device 11 of the present invention, when the controller 17 performs the cooling operation, the flow rate of the water circulation pump 8 is increased or decreased in accordance with the operation load of each refrigerant circuit 6, and the total of the water circulation pumps 8 is increased. Since the opening of the radiator motor-operated valve 16 is adjusted based on the flow rate, energy saving can be achieved. Further, since the controller 17 opens / closes the condenser motor operated valve 9 in accordance with the operation / stop of the compressor 1 having the inverter control function, the water flows backward due to the operation of the water circulation pump 8 during other operations. Since this does not occur, unnecessary pump power is not generated and energy is saved.

  Further, by providing the water circulation pumps 8 corresponding to the plurality of refrigerant circuits 6 and stopping the water circulation pump 8 of the cooling device 11 that is stopped, for example, unnecessary water circulation power can be made unnecessary, thereby further saving energy. .

  Further, the controller 17 varies the rotational speed of the compressor 1 having a capacity control function according to the cooling operation load, varies the flow rate of the water circulation pump 8 with variable flow rate according to the cooling load of the cooling device 11, In addition, the opening degree of the condenser motor operated valve 9 is adjusted. Furthermore, since the controller 17 communicates control information with the plurality of controllers 17 and adjusts the opening degree of the radiator motor-operated valve 16 according to the total flow rate of the water circulation pumps 8 of the plurality of cooling devices 11, the water circulation pump 8 can reduce power consumption and save energy.

  Further, when the places where the two radiators 14 are installed are different and the ambient temperature conditions are different, it is possible to save more energy by increasing the opening of the radiator motor-operated valve 16 of the radiator 14 having a lower ambient temperature. Can measure.

  In addition, the heat exchange amount of the radiator 14 can be dispersed, the optimum capacity operation can be performed, the power consumption of the water circulation pump 8 can be reduced, and the efficiency of the cooling device can be improved. As a result, energy saving can be achieved. And the effect that the contribution to global warming prevention can be achieved simultaneously is acquired.

Embodiment 2. FIG.
FIG. 4 is a diagram showing the configuration of the cooling system according to Embodiment 2 of the present invention. In the present embodiment, the radiator 14, the radiator fan 15, and the radiator motor-operated valve 16 have a plurality of combinations (three in this embodiment). And two of them are arranged in the showcase. About the operation | movement in the refrigerant circuit 6 and the water circuit 10, the operation | movement similar to the cooling device 11 of Embodiment 1 mentioned above is performed.

  FIG. 5 is a diagram illustrating a specific configuration example of the cooling device 11 according to the second embodiment. For example, in Fig.5 (a), the heat radiator 14 in the cooling device 11 is provided in the front foot part of a showcase. With the arrangement as shown in FIG. 5A, the radiator 14 can be used as a heating source for cold aisle countermeasures.

  For example, in FIG.5 (b), the heat radiator 14 in the cooling device 11 is provided in the part of the inner surface of the outer frame of the front lower part of a showcase. By arranging as shown in FIG. 5B, the radiator 14 can be used as a heat source for preventing condensation.

  For example, even if the refrigerant circuit 6 is stopped, the radiator motor-operated valve 16 is opened, the water circulation pump 8 is driven to pass water through the radiator 14 in the showcase, and the radiator fan 15 is driven to Heat exchange and heating are also possible by heat exchange. At this time, since no other heating source is required, energy saving can be achieved.

  As described above, according to the second embodiment, a part of the radiator 14 is disposed indoors (in the cooling device 11), and the heat exhausted by water is used to heat the store and to prevent cold aisle in the footpath of the showcase. It can be used effectively. It can also be used as a heater replacement as a dew condensation prevention heat source for the outer frame of the showcase. For this reason, the load required for heating can be reduced (operating power by other devices, the amount of heat of the heater, etc. can be reduced), and further energy saving can be achieved. And the effect that the contribution to global warming prevention can be achieved simultaneously is acquired.

Embodiment 3 FIG.
Here, although the example which has the two refrigerant circuits 6 was shown in the cooling device 11 in Embodiment 1 and 2, there exists the same effect also when it has three or more.

  Further, the controller 17 is provided for each cooling device 11 (refrigerant circuit 6). However, the control device is centralized to perform processing, and control of the plurality of refrigerant circuits 6, the water circuit 10 and the like is performed. You may make it perform.

  DESCRIPTION OF SYMBOLS 1 Compressor, 2 Water-cooled condenser, 3 Throttling device, 4 Evaporator, 5 Four-way valve, 6 Refrigerant circuit, 7 Blower for evaporator, 8 Water circulation pump, 9 Motor valve for condenser, 10 Water circuit, 11 Cooling device, 12 Inlet Water piping connection port, 13 outlet water piping connection port, 14 radiator, 15 radiator fan, 16 radiator motor operated valve, 17 controller.

Claims (5)

A variable capacity compressor for compressing the refrigerant, a water-cooled condenser for exchanging heat between the refrigerant and water, a throttling device for adjusting the pressure of the refrigerant, and an evaporator for cooling the object to be cooled by heat exchange of the refrigerant A refrigerant circuit comprising;
A flow rate variable water circulation pump for supplying the water to the water-cooled condenser;
A cooling device comprising: a control device that controls a flow rate of water supplied to the water-cooled condenser by the water circulation pump based on an operation load of the refrigerant circuit. A plurality of the cooling devices according to claim 1,
A switching device for controlling the flow of water passing through the water-cooled condenser of each cooling device;
With a radiator that radiates heat to the passing water,
The water-cooled condenser of each cooling device is connected in parallel to the radiator to form a water circuit,
A cooling system comprising: a control device that performs control to stop the water circulation pump corresponding to the refrigerant circuit related to the stop and close the corresponding opening / closing device when the refrigerant circuit is stopped. The cooling device according to claim 1 or 2,
A plurality of radiators that radiate heat to the passing water and a plurality of radiator flow rate adjustment devices that adjust the flow rate of the water flowing through each radiator;
The water circulation pump of the cooling device according to claim 1 or 2 and the plurality of radiators are connected in parallel to form a water circuit,
A cooling system comprising: a control device that controls a flow rate of water adjusted by each radiator flow rate adjusting device based on an operation load in the refrigerant circuit according to claim 1. Fluid supply means for supplying a fluid for heat exchange with the radiator;
4. The cooling system according to claim 3, wherein the control device controls a flow rate of a fluid supplied to the radiator by the fluid supply unit based on a flow rate of water in the flow rate adjusting device for the radiator.   The cooling system according to claim 3 or 4, wherein at least one heat radiator is provided in a room.

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