JPH0498028A - Cooling or cooling/heating device - Google Patents

Abstract

PURPOSE:To reduce energy loss caused by the movements of an ice making part and an ice storage part when both are different and by ice melting, and satisfy all conditions for prevailing an ice storage/cooling system by freezing water in a storage/cooling fluid part by dropping the same onto the heat transfer surface of a heat exchanger part of a water flowing-down type heat exchanger in the case of an ice making mode, and sending water in a return water storage part to a water/heat exchanger for cooling of the same in the case of a cold water cooling mode and simultaneously heating ice frozen on the heat transfer surface of the water flowing-down type heat exchanger part to drop the same into a tank. CONSTITUTION:Upon ice making, a refrigerant flows into a water flowing-down heat exchanger 7 and is chilled with water sprinkled from a sprinkler device 9 by a pump 6 to freeze a heat transfer surface of the water flowing-down type heat exchanger part 7. Thereafter, the operation is changed over to a cooling/water cooling mode, whereby water sucked into a cold water pump 4 is chilled by water heat exchangers 16, 17 and returned again to a tank intermediate temperature part 15 through pipings 18, 19. The refrigerant reduced in pressure by an expansion valve 46 is heated by an upstream water heat exchanger 16 and hence evaporated, and further chilled by the ice frozen in the water flowing-down heat exchanger 7 with part thereof being condensed. On the other hand, the ice frozen on the heat transfer surface of the water flowing-down heat exchanger 7 is heated and dropped onto a cold fluid tank part 20.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a cooling or cooling/heating device, and particularly relates to a cooling or cooling/heating device equipped with an ice heat storage system that performs cooling for air conditioning in summer. be.

Note that the term "heat pump" used in this text refers to heat pumps in a broad sense, including not only dedicated heating machines that obtain heat, but also refrigerators.

[Prior art]

Conventionally, there has been a system in which cold water is produced at night, stored, and used for cooling during the day in order to cut down on the relaxation peak caused by air conditioning during the daytime and to reduce the refrigeration capacity. .

However, in this case, cold heat is stored only by the sensible heat of water, so a huge amount of water is required to cover the daytime cooling load.

For this reason, systems that store ice instead of cold water have been attracting attention recently. In other words, this system uses the latent heat of ice to store cold energy, making it possible to store cold in approximately 1/10 the volume of water, so it is expected to become more widespread in light of the recent rise in land prices. It is a system that has For this reason, many ice storage systems have begun to operate.

Additionally, numerous ice storage systems have been proposed in patent applications and the like.

[Problem to be solved by the invention]

However, although many ice storage systems have been proposed to date, conventional systems have various drawbacks, and their widespread use is still far from sufficient.This is due to the following requirements for ice storage systems: This seems to be because there is no system that satisfies all 10 conditions. In other words, the following 10 conditions are necessary for ice cold storage systems to become widespread.

Condition 1: The system must be able to operate day and night to reduce equipment costs.

Condition 2: In the case of a static method, the IPF (water filling factor) of the ice storage tank must be large in order to reduce equipment costs.

To this end, it is desirable that dead spaces such as water passages be as small as possible during maximum ice making. However, when transporting ice-containing cold fluid to a long distance, there are other conditions, so this is not necessarily a necessary condition. In this case, an important requirement is that the ice be easy to transport.

Condition 3: In order to reduce equipment costs, the heat transfer area for ice making must be small.

Condition 4: In order to reduce operating costs and compressor capacity, small and medium-sized machines must use a direct expansion method that does not require brine.

Condition 5: In order to reduce operating costs, when there is a cooling load, the evaporator is cooled with cold water instead of using ice.

Condition 6: Heat conduction between the evaporator heat transfer surface and water is not inhibited by thick icing.

Condition 7: If the ice making section and ice storage section are different, energy loss due to movement and ice melting should be small.

Condition 8: In order to extend the life of the compressor, operations with large pressure fluctuations, such as reverse cycles during summer, must be avoided.

Condition 9: In order to reduce maintenance and construction costs, small and medium-sized machines must circulate cold water instead of brine on the load side.

Condition 10: When heating hot water in winter, no problems occur due to differences in the amount of refrigerant required between cooling and heating hot water. At that time, the heat storage tank should not become large.

Of course, there are conventional systems that satisfy some of these ten conditions. However, if one of these conditions is satisfied, it is often difficult to satisfy the other conditions, and it is extremely difficult to satisfy all of these 10 conditions, and it is difficult to satisfy them. is a necessary condition.

The above 10 conditions and the conventional example will be compared and explained.

Condition 1 is an essential condition in the case of normal heating and cooling load conditions. That is, it is rare to amortize the increase in heat storage tank cost by simply reducing operating costs without reducing the refrigeration capacity. Therefore, most of the vehicles currently in operation seem to satisfy this condition. Conditions 2 and 3 are difficult conditions. One solution to this problem is a method called a dynamic method in which ice chips or sherbet-like ice are made to flow and the ice is stored in a heat storage tank. However, in many cases, this method cannot satisfy conditions 4, 7, 8.9, etc., which will be described later.

Condition 4 is an important condition for reducing operating costs and equipment costs, but most conventional methods use brine. The reason for this is that it is difficult to satisfy condition 7.10, which will be described later, in the direct expansion type.

Condition 5 has been proposed in the system disclosed in Japanese Patent Application No. 58-148760, and many of the systems currently in use employ systems that satisfy this condition.

However, the system of Japanese Patent Application No. 58-148760 does not mention the solution of the following condition 6, etc., so it is necessary to solve this condition.

Condition 6 is a difficult condition, and various proposals have been exhausted. There are methods such as a dynamic method in which a portion of the water in the brine is frozen, and a method in which a reverse cycle is performed to repeat ice thawing and ice making. However, conditions such as Conditions 9 and 10 cannot be satisfied with the conventional dynamic method, and Condition 8 with the conventional ice-melting method.

Condition 7 is a particularly difficult condition; for example, when ice is being thawed using a method that degrades performance, energy loss increases if thawing takes time.

Condition 8 is a condition for thawing ice, but the reverse cycle method, which is easy to come up with, is difficult to adopt. This is because in the summer, when the cycle is reversed, the evaporation temperature reaches over 30°C, and various research and development efforts are required to ensure trouble-free operation. Condition 9 is also considered to be an essential condition for popularizing ice heat storage systems.

As mentioned above, it is difficult to satisfy conditions 1 to 9, and it is even more difficult to satisfy condition 10, the heating condition.However, if this heating condition cannot be satisfied, it will be difficult for the device to spread rapidly.

The present invention has been made in view of the above-mentioned points, and in particular solves the above condition 7 and satisfies the other conditions as well.The present invention provides ice storage cooling in summer, which also provides hot water supply (and hot water supply) in winter if necessary. The purpose is to provide cooling and heating equipment.

[Means to solve the problem]

In order to solve the above problems, in the present invention, a cooling or cooling/heating device is configured as follows.

A vapor compression heat pump path consisting of a compressor, a condenser, a water flow heat exchanger system, a water heat exchanger, a pressure reduction device, and a refrigerant passage connecting these, and a water flow to the water flow heat exchanger system. one or more watering pumps and watering fluid paths, a lower water passage section of the lower water flow heat exchanger system, a tank disposed below the lower water passage section, a fluid communicating these, and the tank. It is composed of a cold fluid path consisting of a transport pump for transporting cold fluid from the load to the load side, the same water pipe, and a return pipe from the load, and the tank section is a return water storage where the return pipe from the load is fully connected. and a cold storage fluid part that supplies cold fluid to the load, and when in ice making mode, the water in the cold storage fluid part is dropped onto the heat transfer surface of the heat exchanger part of the downstream heat exchanger system. When in cold water cooling mode, the water in the return water storage section is sent to the water heat exchanger for cooling, and at the same time, the ice that has frozen on the heat transfer surface of the water flow heat exchanger section is heated and cooled inside the tank. It is characterized by being made to fall.

Further, the water flow type heat exchanger system is characterized in that it is a direct expansion type evaporator.

In addition, a water flow heat exchanger system is a system consisting of an evaporator that cools the brine, a heat exchanger that is heated by water spray, a pump that circulates the brine, and piping that connects these. The feature is that brine can also be sent to the vessel side to cool the water when in water cooling mode.

In addition, there is a vapor compression heat pump path consisting of a compressor, an ambient temperature side heat exchanger, a water flow heat exchanger system, a water heat exchanger, a pressure reduction device, and a refrigerant passage connecting these; one or more sprinkler pumps and sprinkler fluid paths for supplying water to the heat exchanger system, a lower water passage section of the lower water flow heat exchanger system, a tank provided at the bottom of the lower water flow passage section, and a fluid that connects these. a return water storage section comprising a passage, a transport pump and water pipe for transporting fluid from the tank to the load side, and a return from the load, and to which the tank section is connected to the return pipe from the load; It is equipped with a storage fluid section that supplies fluid to the load, freezes the heat transfer surface of the heat exchanger section of the water flow down heat exchange system, and when in cold water cooling mode, the water in the return water storage section is transferred to the water heat exchanger. At the same time, the ice that has frozen on the heat transfer surface of the water flow heat exchanger is heated and falls into the tank. When in heating mode, the ambient temperature side heat exchanger operates as an evaporator to absorb heat. The system is characterized in that it operates to radiate heat and heat the water spray using a water flow heat exchanger system.

Furthermore, when the temperature-related physical quantity in the tank rises to a predetermined temperature in addition to the normal heating mode in the heating mode,
Or, it has a tank water heat source heating mode in which the heat exchanger of the water flow heat exchanger system acts as an evaporator section and the water heat exchanger acts as a condenser when the outside air temperature related physical quantity falls to a predetermined temperature. It is characterized by the fact that

[Effect]

By configuring the cooling or cooling/heating device as described above, it becomes a system that satisfies all conditions 1 to 10 for popularization of the ice heat storage system, as will be described in detail later.

〔Example〕

Embodiments of the present invention will be described in detail below with reference to FIGS. 1 to 12.

FIG. 1 is a flow sheet for ice making in an air conditioner using a cooling/heating device according to the present invention. In the figure, the flow of refrigerant and water is indicated by arrows. The cooling and cooling/heating devices are usually combined as an ice-cold water unit 3 with a heat pump unit 2 disposed on top of a heat storage unit 1 . Of course, the heat storage unit 1 may be a separate body.

When making ice, the cold water pump 4 is stopped and the compressor 5 and cold fluid pump 6 are operated. Therefore, at this time, the water flow heat exchanger 7 acts as an evaporator.

In the figure, it is a direct expansion type evaporator, and refrigerant flows as the refrigerant, but the effect is the same even if it is through brine etc. (Hereinafter, refrigerant and brine are collectively referred to as refrigerant) . That is, the refrigerant flows into the water flow heat exchanger 7 through the communication pipe 8 and is cooled by water sprayed from the water sprinkler 9 by the pump 6. In the case of the water flow heat exchanger 7 shown in the figure, it is a plate-fin type evaporator. That is, the refrigerant passage surface through which the refrigerant passes is several rectangular refrigerant passages (see Fig. 3) that have two plates that also serve as heat transfer surfaces, as shown in Figs. 2 to 4. Its strength is maintained by fins that form meandering passages inside. Each rectangular coolant passage 10 has an integral structure with a large number of fins 11. 2 is a plan view of the water flow heat exchanger 7, FIG. 3 is a cross-sectional view taken along line A-A, and FIG. 4 is a cross-sectional view taken along line B-B.

The water sprayed from the water sprinkler 9 in FIG. 2 is cooled by the outer surface and fins 11 of the rectangular coolant passage 10 in FIG. It starts to freeze. Then the thickness gradually increases, for example 1
After 0 minutes, the mode switches to the next cooling/water cooling mode shown in FIG. That is, three-way valve 12-1.12-2.13-1.13
-2 is switched, the cold water pump 4 is operated, and the pump 6 is stopped at the same time. The water sucked by this cold water pump 4 is supplied to a tank intermediate temperature section 1 equipped with a return port 14 from the load.
Water temperature No. 5 is intermediate temperature water. The water sucked in by the cold water pump 4 is cooled by the water heat exchanger 16, 17, and is returned to the tank intermediate temperature section 15 again through the piping 18, 19. Hereinafter, the case where the refrigerant is a refrigerant will be explained based on FIG. The refrigerant whose pressure has been reduced by the expansion valve 46 in FIG. , some condense. Then, the water passes through the pipe 19 again, flows into the water heat exchanger 17 on the downstream side, and evaporates.

On the other hand, since the ice that has formed on the heat transfer surface of the water flow heat exchanger 7 is heated, it peels off from the heat transfer surface of the water flow heat exchanger 7.
It falls into the cold fluid tank section 20.

An example of this water flow heat exchanger 7 will be explained with reference to FIGS. 2 to 4. The refrigerant flows into the ladder 21 from the nozzle 8 to the inlet,
The refrigerant flows into the first path refrigerant passage 23 from the communication pipe 22 . In FIG. 4, the first bus 23 → second path 24 → third bus
The soil passes through bus 25 → fourth bus 26 and is dumped to exit header 28 from connection 'Tf 27. In addition, the refrigerant passage is 10.1
There are many such as 0', 10", etc., but all of them have two plates 29.30 on both sides. Also,
These refrigerant passage outlet bus sections are connected to connecting pipes 27, 27', 2
7", . . . are connected to the outlet header 28 and flow out from the nozzle 31. The sprayed water is cooled by the fins 11 and plates 29, 30, and freezes on this surface, and is heated and melted on this surface. In addition, a part of the fin 11 becomes a thermally poor conductor 32, making it difficult to freeze, and the ice becomes smaller after the ice melts.Furthermore, the rectangular coolant passage 10 Insulating material 33.33', 33'', etc. is attached to the top of .10'', 10'',... to prevent ice from forming in these parts. Note that the refrigerant vapor evaporated in the water heat exchanger 17 is transferred to the pipe 34.
, 35, 36, and 37 into the compressor 5 and is compressed.
It passes through pipes 38, 39, and 40 and is cooled by a condenser 41,
Liquefied, piping 42, check valve 43, three-way valve 12-1,
It passes through the pipe 44 and is again depressurized by the expansion valve 46. Note that this cold water cooling mode is operated for, for example, about 2 minutes, and then the ice making mode is changed again.

Therefore, ice can be thawed in the cold water cooling mode without any special reverse cycle or the like.

Further, FIG. 6 is a flow sheet for the summer hot water storage mode. In this mode, the four-way valve 4 is
5. The three-way valves 13-1, 12-1 and 12-2 are switched, and the cold water pump 4 can be fully operated. The refrigerant is compressor 5 - three-way valve 46 - four-way valve 45 → three-way valve 13-1 → piping 35, 34
→Water heat exchanger 17-three-way valve 12-2-water heat exchanger 16→
Check valve 47 → Three-way valve 12-1 → Expansion valve 48 → Ambient temperature side heat exchanger 41 (condenser 41) - Piping 40 - Four-way valve 4
5-compress j115 and cycle. and tank intermediate temperature gt
s water is heated in water heat exchanger 16, 17, and pipe 18
, and is stored in the high temperature section of the tank through the three-way valve 49.

Figure 7 is a flow sheet for cooling/load operation.

The cold water is supplied through the suction pipe 50 in the cold fluid tank section 20 - the three-way valve 51 →
It is sucked into the pump 53 through the temperature control valve 52, and the load 5
4-1.54-2. Sent to the 54-3 side. At this time, the return water is bypassed through a bypass pipe 56 so that the temperature of the cold water sent to the load side is, for example, 7° C. according to a signal from a temperature detector 55. In addition, in order to reduce the pump power, a temperature detector 57 is provided at the cold water inlet of the farthest load 54-3, and based on this signal, an electric motor (not shown) is used to drive the pump 53 within a range where the temperature of this part does not rise. The rotation speed is controlled. Further, water for hot water supply flows in from the nozzle 58. Naturally, pressurized water is replenished and heated by the heat transfer coil 59, turning into hot water for hot water supply load 60-1.6.
Sent to 0-2.60-3.

No. 8 rXJ is a flow sheet for the heating daytime mode. Heating daytime mode, that is, when the outside temperature is high, heat is pumped up from the outside air to produce high-temperature water that can be heated. The three-way and four-way valves are switched so that the refrigerant flows as follows.

The refrigerant compressed by the compressor 5 is transferred to the pipe 38 - three-way valve 46 - pipe 34 - water heat exchanger 17 - three-way valve 12-2 -> water heat exchanger 16 -> check valve 47 -> three-way valve 12-1 - expansion valve 48 −
It circulates through the external heat exchanger 41 (condenser 41 during cooling operation) - piping 40 - four-way valve 45 - compressor 5, and the water heat exchanger 17
．． Heat water at 16. That is, the water in the tank intermediate temperature section IS is pumped up by the cold water pump 4, and the water is pumped up by the water heat exchanger 16.17.
and returns to the tank high temperature section 50 via piping 18.61. Note that when the temperature of the tank high temperature section 50 rises, the three-way valve 49 is switched to return the temperature from the pipe 19 to the upper part of the tank intermediate temperature section 15.

Note that the outside heat exchanger 41 may be an outside heat exchanger that directly exchanges heat with the outside air, or may be a seawater heat exchanger.

Moreover, FIG. 9 is a flow sheet for heating/night mode. The three-way and four-way valves are switched so that the refrigerant flows as follows. The refrigerant compressed by the compressor 5 is transferred to the pipe 38 - three-way valve 46 - four-way valve 45 -> three-way valve 13-1 -> three-way valve 13-2 -> water flow heat exchanger 7 -> check valve 62 - three-way valve 12-1 - It flows from the expansion valve 48 to the outside heat exchanger 41 to the piping 40 to the four-way valve 45 to the compressor 5. On the other hand, water in the tank low temperature section 63 flows from the water sprinkler 9 to the downstream heat exchanger 7 and is heated.

FIG. 10 is a flow sheet for the heating/tank water heat source mode. The three-way valve and four-way valve are switched so that the refrigerant flows as follows. The refrigerant compressed by the compressor 5 is transferred to the pipe 38 → three-way valve 46 → pipe 34 → water heat exchanger 17 → three-way valve 12-2 → water heat exchanger 16 → check valve 47 → check valve 65 → pipe 66 - expansion valve 64 = Water flow heat exchanger 7 → Three-way valve 13-2 → Three-way valve 13-1 → Piping 36 Four-way valve 45
Flows with groan compressor 5. The water in the tank low temperature section 63 is pumped to the pump 6.
Water is sprayed onto the heat exchanger 7 under water flow, and the heat exchanger 7 is completely cooled. Conversely, the water in the tank intermediate temperature section 15 is completely heated by the cold water pump 4 and the water heat exchanger 16.
It flows through the pipe 61 and is stored in the tank high temperature section 50.

11th i! 1 is a flow sheet for heating/severe cold weather mode. That is, when the outside temperature drops abnormally, ice is made using the water flow heat exchanger 7, as in the case of cooling ice making. The flow of the refrigerant at this time is the same as in the heating tank water source mode (see FIG. 10). However, when the ice becomes thick, the system switches to another mode and operates at ℃.

FIG. 12 is an explanatory diagram of heating load operation. This is almost the same as the cooling/load operation shown in FIG. 7, but when the hot water temperature in the cold fluid tank section 20 is low, the switching valve 51 is switched and
0 hot water is sent to the load side. In FIG. 7, cold water is sent to the loads 54-1, 54-2, 54-3 such as fan coil units, but in this case, hot water is sent to the loads 54-1, 54-2, 54-3 for heating.

〔Effect of the invention〕

As explained above, according to the present invention, all of the conditions 1 to 10 for the popularization of ice heat storage systems are satisfied, so the following excellent effects can be obtained.

(1) Of course, you can drive day and night.

(2) Since there is no heat transfer surface in the ice heat storage tank, IFF can be increased. However, in the case of a water transport method that does not require a small IFF, the ice-making heat exchanger must be made smaller because this method does not have a structure in which the ice-making coils are evenly distributed within the ice (3) ice heat storage tank. I can do it.

(4) A method that does not involve brine is also possible, and in this case, the evaporation temperature can be increased.

(5) When cooling high-temperature cold water, the evaporator is heated by the loaded water flow, so the evaporation temperature can be increased.

(6) Heat transfer performance is good because icing does not become thick.

(7) Since cold water is used to cool the ice during thawing, there is almost no loss of energy even if it takes a long time. Furthermore, in the case of the direct expansion type, the evaporation temperature of the heat pump is thawed under operating conditions that are slightly higher than OoC, so there is little pressure fluctuation in the suction section of the compressor.

(8> Since no brine is used on the load side, maintenance and construction costs are low.

(9) Since there are two sets of water sprinkler heat exchangers, in the second invention, it is also possible to use the heat storage tank in two stages during heating, and in this case there is no need to increase the size of the heat storage tank. Also,
Operation is possible even when the outside temperature drops abnormally.

(10) In the same second invention, the ice-making evaporator is also small, and the amount of refrigerant required during cooling and heating is almost the same, allowing stable operation.

(11) In the case of a small machine, the main part of the condensing unit part of the mass-produced machine can be used as is by just changing some piping, resulting in a low price.

[Brief explanation of drawings]

Fig. 1 is a diagram showing a flow sheet during cooling ice making of the cooling or cooling/heating device according to the present invention, Fig. 2 is a plan view of the water flow heat exchanger, and Fig. 3 is a cross-sectional view taken along line A-A of the same. , FIG. 4 is a sectional view taken along the line B-B, FIG. 5 is a flow sheet of the cooling or cooling/heating device according to the present invention in the cooling/water cooling mode, and FIG. 6 is a flow sheet according to the present invention. A diagram showing a flow sheet for the summer/hot water storage mode of the cooling or cooling/heating device,
FIG. 7 shows the cooling/cooling/heating device according to the present invention.
FIG. 8 is a diagram showing a flow sheet in the case of load operation, FIG. 8 is a diagram showing a blow sheet in the heating/daytime mode of the cooling or cooling/heating device according to the present invention, and FIG. 9 is a diagram showing the blow sheet in the case of cooling or cooling according to the present invention・A diagram showing a flow sheet in the case of heating/night mode of the heating device, FIG. 10 is a diagram showing a flow sheet in the case of heating/tank water heat source mode of the cooling or cooling/heating device according to the present invention, FIG. 11 12 is a flow sheet for heating/load operation of the cooling or cooling/heating device according to the present invention in the case of heating/severe cold weather mode of the cooling/cooling/heating device according to the present invention. FIG. In the figure, 1... Heat storage unit, 2... Heat pump unit, 3... Ice cold water unit, 4... Cold water pump, 5... Compressor, 6... Pump, 7...・
... Water flow heat exchanger. Patent applicant: Ebara Corporation Representative: Patent attorney: Takashi Kumagai (1 person) Procedural amendment (submission) October 1990 Published date

Claims (5)

[Claims] (1) A vapor compression heat pump path composed of a compressor, a condenser, a water flow heat exchanger system, a water heat exchanger, a pressure reduction device, and a refrigerant passage connecting these; and the water flow heat exchanger system. one or more sprinkler pumps and a sprinkler fluid path for supplying water to a water supply system, a water flow passage section of the water flow heat exchanger system, a tank disposed below the water flow passage section, and a fluid that communicates these. , a transport pump for transporting cold fluid from the tank to the load side, a water supply pipe, and a cold fluid path consisting of a return pipe from the load, and the tank part is connected to the return pipe from the load. and a cold storage fluid part that supplies cold fluid to the load, and when in ice making mode, the water in the cold storage fluid part is transferred to the heat exchanger part of the downstream heat exchanger system. When in the cold water cooling mode, the water in the return water storage section is sent to the water heat exchanger for cooling, and at the same time ice is formed on the heat transfer surface of the downstream heat exchanger section. A cooling or cooling/heating device characterized in that the ice is heated and dropped into the tank. (2) The cooling or cooling/heating device according to claim (1), wherein the water flow heat exchanger system is a direct expansion evaporator. (3) The water flow heat exchanger system is a system composed of an evaporator that cools the brine, a heat exchanger that is heated by water spraying, a pump that circulates the brine, piping that connects these, and the like, and 2. The cooling or cooling/heating device according to claim 1, wherein brine is also sent to the water heat exchanger side to cool the water during the water cooling mode. (4) A vapor compression heat pump path composed of a compressor, an ambient temperature side heat exchanger, a water flow heat exchanger system, a water heat exchanger, a pressure reduction device, and a refrigerant passage connecting these; and the water flow heat pump path. One or more sprinkler pumps and sprinkler fluid paths for supplying water to the heat exchanger system, the lower water passage of the lower water flow heat exchanger system, the tank provided at the bottom of the lower water flow passage, and communication between these. A return water storage section, which is composed of a fluid passage for transporting fluid from the tank to the load side, a transport pump and water pipe for transporting fluid from the tank to the load side, and a return from the load, and the tank section is connected to the return pipe from the load. and a storage fluid section for supplying fluid to the load, which freezes the heat transfer surface of the heat exchanger section of the downstream heat exchange system, and when in the cold water cooling mode, drains the water from the return water storage section. The water is sent to the water heat exchanger for cooling, and at the same time, the ice that has frozen on the heat transfer surface of the water flow down heat exchanger system is heated and falls into the tank, and when in heating mode, the ambient temperature side heat is heated. A cooling/heating device characterized in that an exchanger is operated as an evaporator to absorb heat, and a water flow type heat exchanger system is operated to radiate heat to heat sprinkled water. (5) When the temperature-related physical quantity in the tank rises to a predetermined temperature in addition to the normal heating mode when in heating mode,
Or, it has a tank water heat source heating mode in which the heat exchanger part of the water flow heat exchanger system acts as an evaporator and the water heat exchanger acts as a condenser when the outside air temperature related physical quantity falls to a predetermined temperature. The cooling/heating device according to claim (4), characterized in that: