JPH0689918B2 - Cooling or cooling / heating device - Google Patents

Description

TECHNICAL FIELD The present invention relates to a cooling / heating device, and more particularly to a cooling or cooling / heating device which mainly heats cooling for cooling in summer and heating in winter. . In addition, in this specification, a "heat pump" means a heat pump in a broad sense that includes not only a dedicated heating machine for obtaining heat but also a refrigerator.

[Prior art]

Conventionally, there is a system in which cold water is manufactured at night for the purpose of cutting power peaks due to cooling in the summer and daytime, and for the purpose of reducing the refrigeration capacity, the cold water is stored, and the cooling is performed during the daytime. .

However, in this case, since the cold heat is stored only by the sensible heat of water, an enormous amount of water storage is required to cover the daytime cooling load.

For this reason, recently, a system that stores ice instead of cold water has attracted attention. In other words, since this system stores cold heat by utilizing latent heat of ice, it can store the same cold with about 1/10 of the volume of ice, so it is possible to cope with recent underground surges and spread. Is expected. for that reason,
Many ice storage systems have been installed and are in operation. Also, many patent applications and proposals have been made regarding this ice storage system.

[Problems to be Solved by the Invention]

However, even though many ice storage systems have been proposed, conventional systems have various drawbacks, and their widespread use is still insufficient. This is probably because there is no system that satisfies all the following 10 conditions required for the ice storage system. That is, the following 10 conditions are necessary for the spread of the ice storage system.

Condition 1, a system that can be operated day and night to reduce equipment costs.

Condition 2, the IPF (ice filling rate) of the ice heat storage tank must be large in the static method to reduce the facility cost. For that purpose, it is desirable that the dead space such as the water passage during the maximum ice making is as small as possible. However, when the cold fluid containing ice is transported to a distant place, there are other conditions, and therefore, it is not always a necessary condition. However, in this case, it is important that the ice be easily transported.

Condition 3, the heat transfer part for ice making must be small to reduce equipment costs.

Condition 4, To reduce operating costs and compressor capacity, small and medium-sized machines should be of the direct expansion type that does not use brine.

Condition 5: To reduce operating costs, the evaporator should be cooled with cold water when there is a cooling load without using ice.

Condition 6, Thick icing should not hinder the heat transfer between the evaporator heat transfer surface and water.

Condition 7: When the ice making section and the ice storage section are different, there is little energy loss due to movement or thaw.

Condition 8: In order to prolong the life of the compressor, it is possible to avoid operation with large pressure fluctuations such as reverse cycle in summer.

Condition 9, To reduce maintenance costs and construction costs, small and medium-sized machines should circulate cold water instead of brine on the load side.

Condition 10, When also performing warm water heating in winter, there shall be no problem due to the difference in the required amount of refrigerant between cooling and warm water heating. And at that time, the heat storage tank should not become large.

Of course, even the conventional system satisfies some of these 10 conditions. However, among these conditions, if one condition is to be satisfied, it is difficult to satisfy the other conditions, and it is technically important to satisfy all 10 conditions. It's difficult. These 10 conditions will be described in comparison with the conventional example.

Condition 1 is an indispensable condition in the case of a normal cooling and heating load condition. That is, it is rare that the increase in the heat storage tank cost can be amortized only by reducing the operating cost without reducing the refrigeration capacity. Therefore, most of the ones currently in operation seem to satisfy this condition.

Conditions 2 and 3 are difficult conditions, and one solution is
This is a method called a dynamic method in which ice pieces or sherbet-like ice is made to flow and this ice is stored in a heat storage tank. However, this method often leads to
In many cases, the conditions such as 4,7,8,9 cannot be satisfied.

Condition 4 is an important condition for reducing operating costs and equipment costs, but the conventional one is mostly through brine. The reason is that it is difficult for the direct expansion type to satisfy the following conditions 7 and 10.

Condition 5 is proposed by the system disclosed in Japanese Patent Application No. 58-148760, and most of the systems currently implemented employ a system that satisfies this condition.

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

Condition 6 is a difficult condition, and various proposals have been made. There is a method in which a part of the water in the brine is frozen to make it a dynamic method, or a method in which a reverse cycle is performed and thawing and ice making are repeated. However, the dynamic method cannot satisfy the conventional conditions 9 and 10, and the deicing method cannot satisfy the condition 8 and the like.

The condition 7 is a particularly difficult condition. For example, when the ice is being thawed by a method of degrading the performance, if the thaw takes a long time, the energy loss increases.

Although condition 8 is a condition for deicing, it is difficult to adopt a reverse cycle method that is easy to think of. In the summer, when the reverse cycle is used, the evaporation temperature rises to 30 ° C or higher, and various studies are necessary to ensure operation without problems.

Condition 9 seems to be an indispensable condition for popularizing the ice heat storage system.

As described above, it is difficult to satisfy the above conditions 1 to 9, but it is also difficult to satisfy the heating condition of the condition 10. However, if heating is not possible, rapid spread will be difficult.

The present invention has been made in view of the above points, and in particular, it solves the above-mentioned condition 7 and further satisfies the other conditions by cooling with ice storage in summer, and cooling or cooling / heating capable of performing hot water heating in winter if necessary. The purpose is to provide a device.

[Means for Solving the Problems]

In order to solve the above problems, the present invention, a compressor, a condenser, a heat exchanger system including at least a water-flow heat exchanger, a pressure reducing device, and a vapor compression heat pump path constituted by a refrigerant passage connecting these, One or more sprinkler pumps and sprinkling fluid paths for delivering water to the heat exchanger system, a water flow-down passage section of the heat exchanger system, a tank disposed under the water flow-down passage section, a fluid connecting these, and It consists of a transport pump for transporting cold fluid from the tank to the load side, a cold fluid path consisting of the same water supply pipe and a return pipe from the load, and the heat exchanger of the heat exchanger system is arranged in the flow direction of the refrigerant body in order. Each is composed of an upstream refrigerant body heat exchanger section, a middle-stream refrigerant body heat exchanger section, and a downstream refrigerant body heat exchanger section, and the tank section is connected to the load with a return water storage section to which a return pipe is connected. Has 貯冷 fluid unit for supplying medium,
In the ice making mode, the water of the cold storage fluid portion is dropped only on the heat transfer surface of the middle-flow refrigerant body heat exchanger portion among the heat transfer surfaces of the three heat exchangers of the heat exchanger system to form ice, thereby cooling the water. In the mode, the water in the return water storage part is sent to only the heat transfer surfaces of the refrigerant heat exchanger parts of the upstream and downstream of the three heat exchanger heat transfer surfaces of the heat exchanger system to heat them, and the medium-flow cooling is performed. It is characterized in that ice formed on the heat transfer surface of the medium passage heat exchanger is heated and dropped into the tank.

Further, the heat exchanger system is a direct expansion evaporator.

Also, an evaporator where the heat exchanger system cools the brine,
The system is characterized by a heat exchanger that is heated by water, a pump that circulates brine, and a pipe that connects these.

Further, in order to send water to the heat exchange system including the compressor, the outside air side heat exchanger, the heat exchange system including at least the water-flow-type heat exchanger, the pressure reducing device, and the refrigerant passage connecting these, and the heat exchange system. One or more sprinkler pumps and sprinklers, a water passage part of a heat exchanger system, a tank provided at the lower part of the water-flow heat exchanger, a fluid connecting these and a fluid for transporting the fluid from the tank to a load side. The heat exchanger of the heat exchanger system is composed of a transport pump and a load fluid path consisting of the same water pipe and a return pipe from the load. Refrigerant body heat exchanger section, composed of a downstream refrigerant body heat exchanger section, the tank section has a return water storage section to which a return pipe from the load is connected and a storage fluid section for supplying a fluid to the load, When the ice mode is frost and water 該貯 feed fluid unit is dropped only to the heat transfer surface of the middle coolant heat exchanger portion of the heat transfer surface of the three heat exchangers of the heat exchanger system,
In the water cooling mode, the water in the return water storage part is sent to only the heat transfer surfaces of the refrigerant heat exchanger parts on the upstream side and the downstream side of the three heat exchanger heat transfer surfaces of the heat exchanger system to heat them. The ice that has formed on the heat transfer surface of the medium-flow refrigerant heat exchanger section is heated and dropped into the tank.In the heating mode, the outside air heat exchanger operates as an evaporator to absorb heat, and is cooled by the heat exchanger system. However, it is operated so as to heat the water spray. In the heating mode, in addition to the normal heating mode, when the tank internal temperature-related physical quantity rises to a predetermined temperature or when the outside air temperature-related physical quantity falls to a predetermined temperature, the middle-flow refrigerant body heat exchanger section is used as an evaporator. It is characterized in that it has a tank water heat source heating mode in which it operates and operates the upstream and downstream refrigerant heat exchanger parts as a condenser.

In the heating mode, in addition to the normal heating mode and the tank water heat source heating mode, the outside air side heat exchanger acts as an evaporator and the midstream refrigerant body heat exchanger acts as a condenser. It is characterized by having a heat storage tank effective utilization heating mode that stops water supply to the heat exchanger.

Also, using a plate type heat exchanger in which the plate for heat exchange between the refrigerant and water is vertically arranged, water is sprinkled from above,
A vertical fin that connects the plates to each other is provided on the sprinkling side, the water is frozen by evaporating the refrigerant, and then the refrigerant is condensed to dissolve the frozen ice plate and the contact portion with the fins, The ice is dropped to the lower part by gravity, and the ice is stored in the lower water tank.

[Action]

By configuring the cooling / heating device as described above, the above-mentioned ice storage system later becomes a cooling or cooling / heating device that satisfies all the above conditions 1 to 10.

〔Example〕

 An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is a flow sheet in the case of ice making of the cooling device according to the first invention of the present application. In the figure, the flow of the refrigerant and water is indicated by arrows. The cooling device is usually grouped as an ice cold water unit 3 in which a heat pump unit 2 is arranged on the heat storage unit 1. Of course, the heat storage unit 1 may be a separate body.

During ice making, the water pump 4 is stopped and the compressor 5 and the cold fluid pump 6 are operated. Therefore, at this time, the midstream refrigerant heat exchanger 7
Acts as an evaporator. In the figure, a direct expansion evaporator in which a refrigerant flows as a refrigerant body, but the operation is the same even when a brine or the like is used (hereinafter, the refrigerant and the brine are collectively referred to as a refrigerant body). That is, the cooling medium flows into the middle-flow cooling medium heat exchanger 7 through the connecting pipe 8 and is cooled by being sprinkled with water from the sprinkler 9 by the pump 6. In the case of the midstream refrigerant heat exchanger 7 in the figure, it is a plate fin type evaporator. That is, the cooling medium passage is made up of several rectangular cooling medium passages 10 each having two plates that also serve as heat transfer surfaces, and the strength thereof is maintained by the fins forming the meandering passages therein. Each rectangular coolant passage 10 has an integral structure with many fins 11.

FIG. 2 is a diagram showing the structure of the midstream refrigerant heat exchanger 7, where FIG. 2 (a) is a plan view, FIG. 2 (b) is a sectional view taken along the line AA of FIG. FIG. 3C is a sectional view taken along the line BB of FIG. Water is cooled by the plate portion forming the rectangular refrigerant passage 10 of the outer surface of the rectangular passage and the fins 11,
Freezing begins to occur on these heat transfer surfaces. The ice thickness increases due to this freezing, and, for example, after 10 minutes, the cold water pump 4 is operated, and at the same time, the cold fluid pump 6 is stopped. That is, the cold water cooling mode shown in FIG. 3 is set. Here, the water sucked by the water pump 4 is relatively high temperature water in the high temperature part 13 of the tank to which the return port 12 is attached from the load. The water sucked by the water pump 4 is sprayed from the water sprinkler 14 to the outside of the upstream refrigerant body heat exchanger section 15 and the downstream refrigerant body heat exchanger section 16. The case where the refrigerant body is a refrigerant will be described below.

The refrigerant decompressed by the expansion valve 17 is heated by water sprinkling in the upstream refrigerant body heat exchanger portion 15 to evaporate, and is cooled by the ice formed outside the heat transfer surface in the midstream refrigerant body heat exchanger 7, The parts condense. Then, it again flows from the pipe 17 'into the downstream refrigerant heat exchanger section 16 and evaporates. On the other hand, since the frozen ice has been heated, the ice adhering to the heat transfer surface of the midstream refrigerant heat exchanger 7 is peeled off and falls into the cold fluid tank portion 18.
Here, an example of the configuration of the midstream refrigerant heat exchanger 7 will be described with reference to FIGS. 2 (a), (b), and (c). Refrigerant flows from the nozzle 8 into the inlet header 19, and the first from the connecting pipe 20.
It flows into the pass refrigerant passage 21. Then, in FIG. 2 (c), it is discharged from the connecting pipe 25 to the outlet header 26 through the first-pass refrigerant passage 21 → the second-pass refrigerant passage 22 → the third-pass refrigerant passage 23 → the fourth-pass refrigerant passage 24. .

Although there are many refrigerant passages such as 10, 10 ', 10 ", two plates 27 and 28, 27' and 28 ', ... are provided on both sides in each case. Connecting pipes 25,25 ', 25 "... are provided in the pass section, and the outlet header
It is in contact with 26, and flows out from the nozzle 29. Sprinkling fins 11,11 ', 11 ", ..., Plates 27,28,27', 2
It is cooled by 8 ″, ..., and frosted on these surfaces, and also heated on these surfaces to be thawing. In addition, some of the fins are heat-defective conductors 30, making it difficult to freeze. It is easy for the ice to become smaller after it is thawed.
A heat insulating material 31,31 ', 32 ", ... is attached to the upper part of the rectangular refrigerant passage 10,10', 10", ... Has become.

The cooling vapor evaporated in the downstream refrigerant body heat exchanger unit 16 flows from the pipe 32 into the compressor 5, is compressed, passes through the pipe 33, is cooled in the condenser 34, is liquefied, and passes through the pipe 35. The pressure is reduced again by the expansion valve 17. It should be noted that this water cooling mode is operated for about 2 minutes, for example, and becomes the ice making mode again. Therefore, the deicing is performed in the cold water cooling mode without particularly performing the reverse cycle.

Further, 36 is a load pump, and when the diameter of the pipe is made small (the pipe becomes thin), cold water containing this ice piece is nozzled.
Send from 37 to the load. Cold water mixed with ice is supplied to the fan coil unit 38.38 'from the branch pipes 39, 39'. Branch pipe 39,39 ′
Is connected to the lower part of the main pipe 40 to prevent ice pieces from entering. Furthermore, the temperature control three-way valve 41,41 'and the mixing tank 42,4
The 2'prevents ice pieces from flowing into the fan coil tube. That is, for example, water at 14 ° C. is bypassed by the bypass pipes 43 and 43 ′ so that the ice pieces are melted.

Return water from a load such as the fan coil unit 38.38 'returns to the ice-cooled water unit 3 through the return main pipe 45 through the pipes 44, 44'.

FIG. 4 is a flow sheet in the case of ice making of the cooling device according to the second invention of the present application. A four-way valve 46, an expansion valve 47, and check valves 49, 50 are further added to the cooling device according to the first aspect of the invention so that hot water can be produced during heating. That is, by switching the four-way valve 46, the outside air side heat exchanger 51 serves as an evaporator, and the upstream refrigerant body heat exchanger section 15, the middle stream refrigerant body heat exchanger 7, and the downstream refrigerant body heat exchanger section 16 serve as a condenser. The heat storage tank acts as a hot water storage tank.

FIG. 5 is a view showing an embodiment of the second invention of the present application, in which the heat storage tank is effectively utilized during heating.

In addition to the normal heating mode described in the explanation of FIG. 4, the tank water heat source heating mode and the heat storage tank effective use mode are provided.

FIG. 5 is a diagram showing an example in which hot water in the tank portion 52 is supplied to the load side even in the normal heating mode. That is, during heating, the four-way valve 53 is switched, and hot water is sent to the load side by the pump 54 (Note: During cooling, the four-way valve 53 is switched to send ice piece water from the tank portion 55 to the load side. ). During normal heating and heat storage, the temperature inside the tank portion 56 rises, and when the thermostat 57 operates, the three-way valves 58 and 59 are switched,
The two-way valve 60 is opened and the two-way valve 61 is closed. Therefore,
The liquid refrigerant is decompressed by the expansion valve 62, and the three-way valve 59 → middle-stream refrigerant heat exchanger 7 → piping 63 → three-way valve 58 → four-way valve 46 → compressor 5 → downstream refrigerant body heat exchanger section 16 → 2 One-way valve 60 → upstream refrigerant body heat exchanger section 15 → passing through pipe 64, the pressure is again reduced by heat tension valve 62.

Further, when the temperature of the tank portion 65 rises, the thermostat 66 operates and the next heat storage tank effective use mode is set.

Automatic valves are switched, cold water pump 4 is stopped,
The refrigerant flows as follows. That is, the refrigerant is the compressor 5 → 4-way valve 46 → downstream refrigerant body heat exchanger section 16 → 2-way valve 61 → middle-stream refrigerant body heat exchanger 7 → upstream refrigerant body heat exchanger section 15 → check valve 50 →
The water temperature of the expansion valve 47 → the outside air side heat exchanger 51 → the three-way valve 58 → the four-way valve 46 → the compressor 5 and the portion 56 of the flow tank rises.

The "tank water heat source heating mode" described above is also performed when the outside air is abnormally lowered and it is more difficult to absorb heat than the outside air, except when the temperature inside the tank rises. That is, for example, when the outside air temperature decreases, the suction pressure of the compressor 5 decreases, and the pressure switch 67 operates, the above-mentioned "tank water heat source heating mode" is entered, and the water temperature of the tank portion 52 is heated to enable heating. To be

〔The invention's effect〕

As described above, according to the present invention, the following excellent effects that satisfy all of the above conditions 1 to 10 for the spread of the ice heat storage system can be obtained.

(1) Naturally, it is possible to drive day and night.

(2) Since there is no heat transfer surface inside the ice heat storage tank, the IPF can be increased. However, in the case of an ice transportation method in which the IPF may be small, ice water containing ice pieces can be produced by the device of the present invention, and therefore the transportation is easy.

(3) Since the ice-making coil is not evenly arranged in the ice heat storage tank, the ice-making heat exchanger can be downsized.

(4) A method not involving the use of brine is also possible, in which case the evaporation temperature can be raised.

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

(6) Since the icing does not become thick, the heat transfer performance is good.

(7) There is no energy loss even if it takes time because cold water is cooled when the ice is thawed. Further, in the case of the direct expansion type, the evaporation temperature of the heat pump is thawed under an operating condition of slightly higher than 0 ° C., so that the pressure fluctuation in the suction part of the compressor is small.

(8) Since no brine is used on the load side, maintenance costs and construction costs can be reduced.

(9) Since there are two sets of sprinkler heat exchangers, in the second invention, it is possible to use the heating heat storage tank in two stages, and in this case it is not necessary to enlarge the heat storage tank. Also,
Operation is possible even if the outside air temperature drops abnormally.

(10) Similarly, in the second aspect of the invention, the ice making evaporator is also small, and the required amount of refrigerant is almost the same during cooling and heating, and stable operation is possible.

(11) In the case of a small machine The main part of the mass production machine can be used as it is at a low price, with only a part of the piping changed for the condensing unit.

(12) Also, the ice maker of the third invention can make thin ice pieces.

[Brief description of drawings]

FIG. 1 is a diagram showing a configuration of a cooling device according to a first invention of the present application, FIG. 2 is a diagram showing a structure of a midstream refrigerant body heat exchanger 7, and FIG. (B) is A in FIG.
-A sectional arrow view, the same figure (c) is a BB sectional arrow view of the same figure (a), FIG. 3 is a water cooling mode operation explanatory view of the cooling device of FIG. 1, and FIG. FIG. 5 is a diagram showing a configuration of a cooling / heating device according to a second invention of the application, and FIG. 5 is a diagram showing an embodiment of the second invention of the present application. In the figure, 1 ... Heat storage part, 2 ... Heat pump unit, 3
...... Ice chilled water unit, 4 …… Cold water pump, 5 …… Compressor, 6 …… Pump, 7 …… Medium flow refrigerant heat exchanger, 8 ……
Nozzle, 9 ... Sprinkler, 10 ... Rectangular refrigerant passage, 11
...... Fins, 12 ...... Return port, 13 ...... High temperature part of tank, 14 ...
… Sprinkler, 15 …… Upstream refrigerant heat exchanger, 16 …… Downstream refrigerant heat exchanger, 17 …… Expansion valve, 19 …… Inlet header,
34 …… Condenser, 36 …… Load pump, 37 …… Nozzle, 38,3
8 '... Juan coil unit, 41, 41' ... Temperature control 3
Directional valve, 42, 42 '... Mixing tank, .46 ... 4-way valve, 47 ... Expansion valve, 49, 50 ... Check valve, 51 ... Outside air side heat exchanger, 5
3 …… 4-way valve, 54 …… pump, 58 …… 3-way valve.

Claims (7)

[Claims] 1. A vapor compression heat pump path comprising a compressor, a condenser, a heat exchanger system including at least a water-flow heat exchanger, a pressure reducing device, and a refrigerant passage connecting these components, and the heat exchanger system. One or more sprinkling pumps and sprinkling fluid paths for delivering water to the water, a water flow-down passage portion of the heat exchanger system, a tank provided at a lower portion of the water flow-down passage portion, a fluid connecting these, and a load side from the tank. A cold fluid path consisting of a transport pump for transporting the cold fluid to and from the same water pipe and a return pipe from the load,
And the heat exchanger of the heat exchanger system is composed of an upstream refrigerant body heat exchanger section, a middle-stream refrigerant body heat exchanger section, and a downstream refrigerant body heat exchanger section, respectively, in the flow direction of the refrigerant body, and the tank section from the load. It has a return water storage part to which a return pipe is connected and a cold storage fluid part for supplying a refrigerant body to a load. In the ice making mode, the water of the cold storage fluid part is supplied to the three heat exchanger system heats. Of the heat transfer surfaces of the exchanger, only the heat transfer surface of the middle-flow refrigerant body heat exchanger section is dropped to cause icing, and in the water cooling mode, the water in the return water storage section is supplied to the three heat exchanger systems. Of the heat exchanger heat transfer surface, heated and fed only to the heat transfer surface of each of the upstream and downstream refrigerant body heat exchanger parts, heating the ice formed on the heat transfer surface of the middle-stream refrigerant body passage heat exchanger, A cooling device which is adapted to be dropped into the tank. 2. The cooling device according to claim 1, wherein the heat exchanger system is a direct expansion evaporator. 3. The heat exchanger system is a system including an evaporator for cooling brine, a heat exchanger heated by water, a pump for circulating brine, and a pipe connecting these components. The cooling device according to claim 1. 4. A vapor compression heat pump path constituted by a compressor, an outside air side heat exchanger, a heat exchange system including at least a water flow type heat exchanger, a pressure reducing device, and a refrigerant passage connecting these, and the heat exchange system. For sending water to
In order to transport the above-mentioned sprinkling pump and sprinkling section, the water passage section of the heat exchanger system, the tank provided at the lower part of the water flow-down heat exchanger, the fluid connecting these, and the fluid from the tank to the load side. Of the transport pump and the same flow pipe and a load fluid path consisting of a return pipe from the load, and the heat exchanger of the heat exchanger system in the flow direction of the refrigerant body, respectively, upstream refrigerant body heat exchanger section, It is composed of a middle-flow refrigerant body heat exchanger section and a downstream refrigerant body heat exchanger section, and the tank section has a return water storage section to which a return pipe from the load is connected and a storage fluid section that supplies fluid to the load. During the ice making mode, the water in the stored fluid portion is allowed to drop only on the heat transfer surface of the middle-flow refrigerant body heat exchanger part among the heat transfer surfaces of the three heat exchangers of the heat exchanger system to cause ice formation, In the cooling mode, the water in the return water reservoir is Of the three heat exchanger heat transfer surfaces of the heat exchanger system, only the heat transfer surfaces of the upstream and downstream refrigerant body heat exchanger sections are fed and heated, and ice is formed on the heat transfer surfaces of the midstream refrigerant body heat exchanger section. When the heated ice is dropped into the tank, and in the heating mode, the outside air heat exchanger is operated as an evaporator to absorb heat, cooled by the heat exchanger system, and operated to heat the sprinkling water. Cooling and heating system characterized by. 5. The middle-flow refrigerant body heat exchanger section when the physical quantity related to the temperature inside the tank rises to a predetermined temperature or when the physical quantity related to the outside air temperature falls to a predetermined temperature in the heating mode other than the normal heating mode. 5. The cooling / heating device according to claim 4, further comprising a tank water heat source heating mode in which the tank heat source heating mode is operated in which the refrigerant acts as an evaporator and the upstream and downstream refrigerant body heat exchanger units operate as a condenser. 6. In the heating mode, in addition to the normal heating mode and the tank water heat source heating mode, the outside air side heat exchanger acts as an evaporator and the midstream refrigerant heat exchanger acts as a condenser. The cooling / heating system according to claim 5, wherein the cooling / heating system has a heat storage tank effective utilization heating mode in which water supply to the downstream refrigerant heat exchanger is stopped. 7. A plate type heat exchanger in which a plate for heat exchange between a refrigerant and water is vertically arranged is used to sprinkle water from above and a vertical fin for connecting the plates is arranged on the sprinkling side. Then, the water is frozen by evaporating the refrigerant,
Then, the refrigerant is condensed to melt the contact portion of the frozen ice with the plate and the fins, and the ice is dropped to the lower part by gravity to store the ice in the lower water tank.