JP3453324B2 - Complex refrigerant circuit equipment - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to, for example, a plurality of refrigerant circuits that cool different environments to be cooled in different cooling temperature ranges, that is, different refrigerant evaporation temperatures of an evaporator, and a heat storage tank for storing cold heat. The present invention relates to a composite type refrigerant circuit facility including:

[0002]

2. Description of the Related Art Conventionally, FIG. 9 shows the structure of a composite refrigerant circuit facility for cooling a refrigerator, a showcase, or the like, which is an environment to be cooled, such as a food processing center or a food store. In the figure, 1 is a refrigeration side compressor (first compressor), 2 is a refrigeration side condenser (first condenser), and 3 is a refrigeration side evaporator (first evaporator) indicated by 5. A solenoid valve for refrigerating on and off for refrigerating side, a refrigerating side expansion valve (an example of a first expansion device), and 6 a refrigerating side refrigerant pipe communicating these.
Further, 7 is a refrigerating-side heat storage tank that stores a heat storage agent such as water, 8 is a refrigerating-side heat storage evaporator (heat storage heat exchanger), and 9
Is a solenoid valve for heat storage on the refrigeration side for connecting and disconnecting the refrigerant to be supplied to the evaporator 8 for heat storage on the refrigeration side, 10 is an expansion valve for heat storage on the refrigeration side (an example of a throttle device for heat storage), and 11 is heat exchange for supercooling on the refrigeration side. Refrigerator, 12 and 13 are refrigeration side supercooling switching solenoid valve, 1 respectively
Reference numeral 4 denotes a refrigerant pipe for refrigerating-side supercooling, which is communicated with the refrigerant pipe 6 and bypasses the refrigerant to the refrigerating-side supercooling heat exchanger 11, and 15 is connected in parallel with the refrigerant pipe 6, and evaporates for refrigerating-side heat storage. The refrigerant piping for sending a refrigerant to container 8 is shown. 1 to 1
From the components denoted by reference numeral 5, for example, a showcase where the refrigerating side evaporator 5 is placed (an example of the first environment to be cooled, for example, a target temperature exceeding 0 ° C. is set)
A refrigeration side refrigerant circuit [(an example of the first refrigerant circuit)] for cooling the.

Reference numeral 21 is a refrigeration side compressor (second compressor), 22 is a refrigeration side condenser (second condenser), and 23 is 2.
A freezing side solenoid valve for connecting and disconnecting the refrigerant to be supplied to the freezing side evaporator (second evaporator) shown by 5, 24 is a freezing side expansion valve (an example of a second expansion device), and 26 communicates these. The refrigerant piping on the freezing side is shown. Further, 27 is a freezing side heat storage tank containing a heat storage agent such as water, 28 is a freezing side heat storage evaporator, and 29 is a freezing side heat storage for intermittently supplying a refrigerant to the freezing side heat storage evaporator 28. An electromagnetic valve, 30 is a freezing side heat storage expansion valve, 31 is a freezing side supercooling heat exchanger (cooling heat supply heat exchanger), 32 and 33 are freezing side supercooling switching electromagnetic valves, and 34 is a refrigerant pipe 26. Refrigerant piping for freezing side supercooling for communicating and bypassing the refrigerant to the heat exchanger 31 for subcooling on the freezing side, 35 is communicated in parallel to the refrigerant pipe 26 and sends the refrigerant to the evaporator 28 for heat storage on the freezing side. The refrigerant piping for is shown. From the components denoted by the reference numerals 21 to 35, for example, a freezer in which the freezing side evaporator 25 is placed (an example of a second environment to be cooled, which is set to a target temperature of 0 ° C. or less, for example) A refrigeration side refrigerant circuit [(an example of a second refrigerant circuit)] for cooling the refrigerant is configured. Here, illustration of load-side devices such as showcases, refrigerators, and freezers in stores is omitted.

Next, the operation of the conventional equipment will be described with reference to FIG. First, in the refrigerating-side refrigerant circuit, high-temperature, high-pressure gas compressed by the refrigerating-side compressor 1 with each refrigerating-side supercooling switching solenoid valve 12 closed and the refrigerating-side supercooling switching solenoid valve 13 opened. Refrigerant is cooled in the refrigerator side condenser 2.
After being liquefied and decompressed by the refrigeration expansion valve 4 through the refrigeration solenoid valve 3, it flows into the refrigeration evaporator 5 to evaporate and absorb heat, cool the showcase and refrigerator, and return to the refrigeration compressor 1. To do. The same cycle is repeated thereafter. When the refrigerating capacity required to bring the environment to be cooled to the preset target temperature (this refrigerating capacity is referred to as "load") increases, the refrigerating-side subcooling switching solenoid valve 13 is closed to close each refrigerating room. By opening the side subcooling switching solenoid valve 12, the refrigerant from the refrigeration side condenser 2 is guided to the refrigeration side subcooling heat exchanger 11, and the cold heat previously stored in the refrigeration side heat storage tank 7 is taken out to show. Use for cooling the case. The refrigeration side solenoid valve 3 is opened / closed in accordance with a load state obtained based on an output result of a temperature controller (not shown) attached to a showcase or the like, and a refrigerant to be introduced into the refrigeration side evaporator 5. Control the liquid supply. On the other hand, regarding the operation of the refrigeration side refrigerant circuit shown from 21 to 35, the evaporation temperature of the refrigerant in the freezing side evaporator 25 is set lower than the evaporation temperature in the refrigeration side evaporator 5 of the refrigeration side refrigerant circuit. Since the other components are the same as those of the refrigeration side refrigerant circuit, description thereof will be omitted.

[0005]

The refrigeration side refrigerant circuit, that is, the refrigerant circuit in which the evaporation temperature of the refrigerant in the evaporator is low, is generally higher than that in the refrigeration side refrigerant circuit having a high evaporation temperature.
It is said that the refrigeration efficiency is low. And, as mentioned above,
In the conventional composite refrigerant circuit facility, a refrigeration side refrigerant circuit and a freezing side refrigerant circuit are separately and separately configured according to a target evaporation temperature. Therefore, there is a difference in refrigerating efficiency between the refrigerant circuits, and it cannot be said that the overall refrigerating efficiency of the entire equipment is good.

Further, since the cold heat transfer between the heat storage evaporator and the supercooling heat exchanger in each refrigerant circuit is entrusted to the natural convection of the heat storage agent, the cold heat transfer efficiency is not good.

Further, during cold storage operation, excess cold heat may be stored at the same time during cooling of the environment to be cooled, but when the heat exchange capacity of the heat storage evaporator is too large,
Since the cold heat is stored more than necessary, the cooling capacity for the environment to be cooled is drastically reduced. As a result, the temperature of, for example, the object to be cooled stored in the showcase or the refrigerator may rise.

Further, when the heat exchange capacity of the supercooling heat exchanger exceeds the capacity control range of the expansion valve, the gas-liquid mixed refrigerant is directly returned to the suction side of the compressor, which causes a mechanical adverse effect. However, there is a problem in that the reliability of the equipment is impaired.

Since the heat exchanger for cold storage and the heat exchanger for supercooling are separately and independently provided, the initial manufacturing cost of these heat exchangers is large, and there is room for improvement in terms of investment effect. was there.

Further, even if the refrigerant has the same evaporation temperature in the evaporator, if a plurality of systems of refrigerant circuits are provided depending on the type of environment to be cooled, the load condition of the environment to be cooled is different for each system. In many cases, it was not uniform, and there was room for improvement in the overall operating efficiency of all compressors due to variations in the operating rate of each compressor in each system.

The present invention has been made in order to solve the problems of the prior art as described above, and by moving the surplus cold heat of the refrigerant circuit having high refrigeration efficiency to the refrigerant circuit having low refrigeration efficiency, the entire equipment is reduced. It is an object of the present invention to provide a composite refrigerant circuit facility capable of improving the overall refrigeration efficiency as described above.

[0012] It is another object of the present invention to provide a composite refrigerant circuit facility which is excellent in cold heat transfer efficiency of surplus cold heat between a plurality of refrigerant circuits.

Further, in the case of storing excess cold heat at the same time during cooling of the environment to be cooled during the cold storage operation, the cooling capacity for the showcase, refrigerator, etc. is reduced by appropriately controlling the amount of cold storage. It is an object of the present invention to provide a composite refrigerant circuit facility capable of preventing the temperature of the object to be cooled stored in the container from rising.

It is another object of the present invention to provide a composite refrigerant circuit equipment which does not impair the reliability of the equipment such that the gas-liquid mixed refrigerant is returned to the suction side of the compressor as it is to cause a mechanical adverse effect. To do.

Another object of the present invention is to provide a composite refrigerant circuit facility capable of reducing the manufacturing cost of initials for the heat exchanger for cold storage and the heat exchanger for supercooling.

[0016]

In order to achieve the above object, the composite refrigerant circuit equipment according to the present invention is provided with the following technical means. That is, in the composite refrigerant circuit facility according to the invention of claim 1, the first compressor, the first condenser, the first expansion device, and the first evaporator for cooling the first cooled environment are sequentially piped. With connection, the first
The expansion device and the first evaporator are connected in parallel to the expansion device for heat storage and the heat exchanger for heat storage, and the first compressor, the first condenser, the expansion device for heat storage, and the heat storage. A first refrigeration-side refrigerant circuit on the refrigeration side, which is formed by sequentially connecting heat exchangers for cooling, a second compressor, a second condenser, a heat exchanger for supplying cold heat, a second expansion device, and the above-mentioned. A second refrigerating-side refrigerant circuit on the freezing side, in which a second evaporator that cools a second refrigerating environment that is lower in temperature than the first refrigerating environment is sequentially connected, and a heat storage agent are stored. and a heat storage tank that, before
The heat storage heat exchanger and the cold heat supply heat exchanger are stored
It is placed in a heat tank and the second cooled side refrigerant circuit
The passage should have a heat storage heat exchanger installed in the heat storage tank.
Without the cold heat of the first of the cooling-side refrigerant circuit and the cold storage in the heat storage agent of the heat storage tank through the heat storage heat exchanger, the cold heat said are cold storage through the cold feed heat exchanger Second
Is supplied to the cooled side refrigerant circuit.

In the composite refrigerant circuit facility according to the second aspect of the present invention, the first compressor, the first condenser, the first expansion device, and the first evaporator for cooling the first environment to be cooled are sequentially arranged. A main circuit connected by piping, the first expansion device, and the first
A heat storage expansion device and a heat storage heat exchanger are connected in parallel with the evaporator of FIG. 1, and the first compressor, the first condenser, the heat storage expansion device, and the heat storage heat exchanger are sequentially piped. A first refrigeration-side refrigerant circuit on the refrigeration side having a connected sub-circuit, a second compressor, a second condenser, a heat exchanger for supplying cold heat, a second expansion device, and the first Second refrigerant to be cooled on the refrigeration side having only a main circuit in which a second evaporator for cooling the second environment to be cooled to a temperature lower than that of A heat storage tank containing a heat storage agent, the heat storage heat exchanger and the cold heat supply heat exchanger
And the second heat receiving tank are provided in the heat storage tank.
The refrigerant circuit on the rejection side is a heat exchange for heat storage arranged in the heat storage tank.
Without a container, the cold heat of the first cooled side refrigerant circuit is stored in the heat storage agent of the heat storage tank via the heat storage heat exchanger,
The stored cold heat is supplied to the second cooled side refrigerant circuit via the cold heat supply heat exchanger.

According to another aspect of the present invention, there is provided a combined refrigerant circuit facility including a first compressor, a first condenser, a first expansion device, and a first evaporator for cooling a first environment to be cooled. For heat storage, which is formed by sequentially connecting one or more first refrigerant circuits that are sequentially connected in a ring, the first compressor, the first condenser, the heat storage expansion device, and the heat storage heat exchanger. A first refrigeration side refrigerant circuit on the refrigerating side having a refrigerant circuit, and the above-mentioned storage inside
A heat storage tank in which a heat exchanger for heat is arranged and which stores a heat storage agent for storing cold heat through the heat storage heat exchanger by the heat storage refrigerant circuit, a second compressor, a second condenser, and the heat storage Tank
A first cold heat supply circuit having a heat exchanger for cold heat supply for supplying cold heat from the heat storage agent, a second expansion device, and a second temperature lower than the first environment to be cooled.
And a second refrigerant circuit having one or more systems in which second evaporators for cooling the environment to be cooled are sequentially connected in an annular shape.
The compressor, the second condenser, no thermal storage refrigerant circuit formed by sequentially connecting the other diaphragm heat storage device and heat storage heat exchanger, and a second of the cooling-side refrigerant circuit of the refrigeration side It is characterized by having.

Further, the composite refrigerant circuit equipment according to the invention of claim 4 is the one according to any one of claims 1 to 3, wherein the first condenser and the first condenser of the first cooled side refrigerant circuit are provided.
A heat exchanger for supercooling connected to the expansion device, and supplies cold heat of the heat storage agent of the heat storage tank to the refrigerant from the first condenser via the heat exchanger for supercooling. It is characterized by that.

The composite refrigerant circuit equipment according to a fifth aspect of the present invention is the composite refrigerant circuit facility according to the first to fourth aspects, wherein the heat storage heat exchanger is housed in the heat storage tank, and the refrigerant in the heat storage refrigerant circuit is the refrigerant. It is characterized by directly exchanging heat with the heat storage agent.

The composite refrigerant circuit equipment according to a sixth aspect of the present invention is the composite refrigerant circuit facility according to the first to fourth aspects, wherein the heat storage tank is provided between the heat storage heat exchanger and the heat storage tank. A first heat storage agent circulating device for circulating a heat storage agent in the heat storage heat exchanger and exchanging heat with the refrigerant in the heat storage refrigerant circuit is provided.

A composite refrigerant circuit facility according to a seventh aspect of the present invention is the composite refrigerant circuit facility according to any of the first to sixth aspects, wherein a first refrigerating capacity detecting device for detecting refrigerating capacity of the first refrigerant circuit is provided. The first refrigerant circulation amount control device for controlling the circulation amount of the refrigerant in the heat storage refrigerant circuit based on the output of the first refrigerating capacity detection device.

The composite refrigerant circuit equipment according to an eighth aspect of the present invention is the composite refrigerant circuit equipment according to the seventh aspect, wherein the refrigerating capacity given to the first cooled environment by the first refrigerating capacity detecting device is used. Detecting, and controlling the flow rate of the refrigerant in the heat storage refrigerant circuit based on the difference between the maximum refrigerating capacity of the first refrigerant circuit and the detected refrigerating capacity by the first refrigerant flow rate control device. It is characterized by. .

According to a ninth aspect of the present invention, there is provided a composite refrigerant circuit facility according to the sixth aspect, wherein a first refrigerating capacity detecting device for detecting a refrigerating capacity of the first refrigerant circuit is provided. A first heat storage agent circulation amount control device for controlling the flow rate of the refrigerant of the first heat storage agent circulation device based on the output of the first refrigeration capacity detection device. .

According to a tenth aspect of the present invention, there is provided the composite refrigerant circuit facility according to the ninth aspect, wherein:
The refrigerating capacity detecting device detects the refrigerating capacity given to the first cooled environment, and the first heat storage agent circulation amount control device detects the maximum refrigerating capacity of the first refrigerant circuit and the detected refrigerating capacity. It is characterized in that the circulation amount of the heat storage agent by the first heat storage agent circulating device is controlled on the basis of the difference from the capacity. .

The composite refrigerant circuit equipment according to an eleventh aspect of the present invention is the composite refrigerant circuit equipment according to any one of the first to tenth aspects, wherein the first condenser and the first expansion device of the first refrigerant circuit are provided. And a second cold heat supply circuit having a subcooling heat exchanger connected between the subcoolers and supplying the cold heat of the heat storage agent of the heat storage tank to the refrigerant from the first condenser. To do. .

Further, in the composite refrigerant circuit facility according to the invention of claim 12, in the eleventh aspect of the invention, the subcooling heat exchanger is accommodated in the heat storage tank, The refrigerant directly exchanges heat with the heat storage agent in the heat storage tank.

The composite refrigerant circuit equipment according to the invention of claim 13 is the one according to claim 11, wherein the heat storage tank is provided between the subcooling heat exchanger and the heat storage tank. A heat storage agent from the first cooling unit is circulated to the supercooling heat exchanger to exchange heat with the refrigerant from the first condenser;
The heat storage agent circulating device is provided.

The composite refrigerant circuit facility according to the invention of claim 14 is the one according to any one of claims 1 to 4, wherein the heat storage heat exchanger and the heat storage tank are interposed between the heat storage tank and the heat storage tank. A first heat storage agent circulating device for circulating the heat storage agent from the tank to the heat storage heat exchanger to exchange heat with the refrigerant of the heat storage refrigerant circuit; a first condenser of the first refrigerant circuit; A second cold heat supply circuit connected between the first expansion device and the heat storage heat exchanger to supply the cold heat of the heat storage agent of the heat storage tank to the refrigerant from the first condenser; and the heat storage refrigerant. A refrigerant flow path control device for switching between a circuit and the second cold heat supply circuit is provided.

According to a fifteenth aspect of the present invention, in the combined refrigerant circuit facility according to the fourteenth aspect, there is provided a first refrigerating capacity detecting device for detecting refrigerating capacity of the first refrigerant circuit, and A first heat storage agent circulation amount control device for controlling the flow rate of the refrigerant of the first heat storage agent circulation device based on the output of the first refrigeration capacity detection device.

The composite refrigerant circuit facility according to a sixteenth aspect of the present invention is the one according to the fourteenth aspect, further comprising a heat storage amount detection device for detecting the heat storage amount of the heat storage agent in the heat storage tank, and the refrigerant flow path. The control device switches between the heat storage refrigerant circuit and the second cold heat supply circuit based on the output of the heat storage amount detection device.

According to a seventeenth aspect of the present invention, in the composite refrigerant circuit facility according to any one of the first to sixteenth aspects, in the second cooled side refrigerant circuit , the second cooled side is provided. All the refrigerant in the refrigerant circuit is the heat for supplying the cold heat.
It is characterized in that it is distributed to an exchanger .

Further, the combined refrigerant circuit equipment according to the invention of claim 18 is the one according to any one of claims 1 to 16, wherein the first cooling heat supply circuit in the second refrigerant circuit is provided in parallel. A bypass circuit for controllably dividing the refrigerant from the second condenser to the second expansion device is provided. .

According to a nineteenth aspect of the present invention, in the combined refrigerant circuit facility according to the seventeenth or eighteenth aspect, the heat exchanger for supplying cold heat is accommodated in the heat storage tank,
The refrigerant in the second refrigerant circuit directly exchanges heat with the heat storage agent in the heat storage tank.

The composite refrigerant circuit equipment according to the invention of claim 20 is the one according to the aspect of claim 17 or 18, which is provided between the heat exchanger for cold heat supply and the heat storage tank. A second heat storage agent circulating device for circulating the heat storage agent from the heat storage tank to the heat exchanger for supplying cold heat to exchange heat with the refrigerant of the second refrigerant circuit to be cooled. It is characterized by.

According to a twenty-first aspect of the present invention, there is provided a composite refrigerant circuit facility according to the eighteenth aspect, wherein a second refrigerating capacity detecting device for detecting refrigerating capacity of the second refrigerant circuit is provided. A second control for controlling the flow rate of the refrigerant in the first cold heat supply circuit based on the output of the second refrigerating capacity detection device.
And a refrigerant flow rate control device.

Further, in the composite refrigerant circuit equipment according to the invention of claim 22, in the one according to claim 21, the refrigerating capacity given to the second cooled environment by the second refrigerating capacity detecting device is provided. The second refrigerant flow rate control device detects and controls the refrigerant flow rate of the first cold heat supply circuit based on the difference between the maximum refrigerating capacity of the second refrigerant circuit and the detected refrigerating capacity. It is characterized by doing.

The composite refrigerant circuit equipment according to the invention of claim 23 is the one according to claim 20, wherein a second refrigerating capacity detecting device for detecting refrigerating capacity of the second refrigerant circuit, and The second heat storage agent circulation amount control device for controlling the flow rate of the refrigerant of the second heat storage agent circulation device based on the output of the second refrigeration capacity detection device.

The composite refrigerant circuit equipment according to the invention of claim 24 is the one according to claim 23, wherein the refrigerating capacity given to the second cooled environment by the second refrigerating capacity detecting device is Detecting and circulating the heat storage agent by the second heat storage agent circulation device based on the difference between the maximum refrigeration capacity of the second refrigerant circuit and the detected refrigeration capacity by the second heat storage agent circulation amount control device. It is characterized by controlling the quantity.

The composite refrigerant circuit equipment according to the twenty-fifth aspect of the present invention is the first evaporation, which cools the first compressor, the first condenser, the first expansion device, and the first environment to be cooled. A first refrigerant circuit on the refrigerating side of at least one system, which is formed by sequentially connecting the compressors in an annular shape, and the first compressor, the first condenser, the heat storage expansion device, and the heat storage heat exchanger are sequentially connected. A heat storage tank containing a heat storage agent that stores cold heat via the heat storage heat exchanger through the heat storage refrigerant circuit, a second compressor, and the heat storage agent of the heat storage tank. A first cold heat supply circuit having a cold heat supply heat exchanger for supplying cold heat of the second cooling device, a second expansion device, and a second cooled environment cooled to a temperature lower than the first cooled environment and a second refrigerant circuit 2 of the evaporator successively formed by annularly connecting one system or refrigeration side, The cold supply the serial heat storage heat exchanger
With a heat exchanger for use in the heat storage tank,
The second refrigerant circuit is a heat storage heat exchanger provided in the heat storage tank.
The heat exchanger for cold heat supply is made to function as a condenser of the second refrigerant circuit without a converter, and the first cooled side cooler is provided.
The cold heat of the medium circuit is transferred to the heat storage tank via the heat storage heat exchanger.
The heat is stored in the heat storage agent and the stored cold heat is supplied to the cold heat.
Supply to the second cooled side refrigerant circuit via the heat exchanger for use
It is characterized by doing.

The composite refrigerant circuit equipment according to the invention of claim 26 is the one according to any one of claims 1 to 25, wherein the refrigerant evaporation temperature of the first evaporator in the first refrigerant circuit is the above-mentioned. It is characterized in that the temperature is set higher than the refrigerant evaporation temperature of the second evaporator in the second refrigerant circuit.

[0042]

In the composite type refrigerant circuit equipment according to the present invention, between the plurality of refrigerant circuits for respectively cooling the plurality of environments to be cooled having different cooling temperatures, the first refrigerant circuit on the high cooling temperature side having high refrigeration efficiency is provided. The surplus cold heat can be stored in the heat storage agent of the heat storage tank via the heat storage heat exchanger, and transferred to the second refrigerant circuit on the low cooling temperature side with low refrigeration efficiency via the heat storage tank. As a result, the refrigeration efficiency of the entire facility can be improved.

In addition to being able to transfer excess cold heat from the first refrigerant circuit to the second refrigerant circuit through the heat storage tank, the excess cold heat quantity of the first refrigerant circuit (first (Compatible with physical quantities such as compressor inlet pressure and cooled environment temperature)
Accordingly, the amount of refrigerant flowing from the first refrigerant circuit to the heat storage heat exchanger can be controlled. Thereby, the cold storage amount of the surplus cold heat can be controlled.

On the contrary, in accordance with the refrigerating capacity (corresponding to the physical quantity such as the inlet pressure of the second compressor and the environment temperature to be cooled) of the second refrigerant circuit, the heat exchange for heat storage from the second refrigerant circuit. The amount of refrigerant flowing into the container can be controlled. This makes it possible to control the amount of cold heat received from the heat storage tank.

Further, by the first heat storage agent circulation device and the second heat storage agent circulation device, respectively toward the heat storage heat exchanger and the cold heat supply heat exchanger for transferring the cold heat to and from the heat storage tank. The heat storage agent from the heat storage tank can be forcedly circulated. Therefore, the cold heat transfer efficiency can be improved.

The first heat storage agent circulation amount control device controls the first heat storage agent circulation device according to the surplus cold heat amount in the first refrigerant circuit corresponding to the physical quantity from the first refrigeration capacity detection device. Controls the circulation amount of the heat storage agent. Therefore, it is possible to control the heat storage amount of the surplus cold heat from the first refrigerant circuit.

On the contrary, in accordance with the insufficient refrigerating capacity in the second refrigerant circuit corresponding to the physical quantity from the second refrigerating capacity detecting device, the second heat storing agent circulating amount control device causes the second heat storing agent circulating device to operate. To control the circulation amount of the heat storage agent. This makes it possible to control the amount of supply of the refrigeration capacity that is insufficient in the second refrigerant circuit.

The heat storage amount of the heat storage agent is detected by the heat storage amount detecting device. According to the detected heat storage amount, the refrigerant flow path control device switches the refrigerant flow path to
One heat storage heat exchanger connected to the refrigerant circuit is used as an evaporator or a condenser. Therefore, the manufacturing cost of the initials for the heat exchanger can be reduced.

Since the second condenser is provided in the heat storage tank so that the cold heat from the heat storage agent can be supplied to the second refrigerant circuit, the high temperature refrigerant from the second compressor is second condensed. It is directly condensed by the cold heat of the heat storage agent from the heat storage tank and further supercooled. Thereby, the cold heat of the heat storage agent can be efficiently used. In addition, the manufacturing cost of the initials for the heat exchanger can be reduced.

[0050]

EXAMPLES Example 1. 1 is a block diagram showing a composite refrigerant circuit facility according to a first embodiment of the present invention.
10, 15, 21 to 26, and 31 are the same as the above-mentioned conventional equipment. Then, the refrigeration side compressor (first compressor) 1, the refrigeration side condenser (first condenser) 2, the refrigeration side expansion valve (first expansion device) 4, and the refrigeration side evaporator (first). The first refrigerating circuit (or the first main circuit, hereinafter the same in the present specification) on the refrigerating side by sequentially connecting the evaporators 5 in an annular shape.
Are configured. In addition, the refrigeration side compressor (first compressor)
1, a refrigeration side condenser (first condenser) 2, a refrigeration side heat storage expansion valve (heat storage expansion device) 10 and a refrigeration side heat storage evaporator (heat storage heat exchanger) 8 are sequentially connected for heat storage A refrigerant circuit (or a sub-circuit, hereinafter the same in the present specification) is configured. This refrigeration side first refrigerant circuit (first main circuit)
And the heat storage refrigerant circuit (sub-circuit) form a first refrigerating-side refrigerant circuit on the refrigeration side (hereinafter the same in this specification).

Further, 37 is a heat storage tank containing a heat storage agent such as water, 34a is a heat exchanger for subcooling on the freezing side (heat exchanger for supplying cold heat) 31 of the refrigerant circuit on the freezing side provided in the heat storage tank 37.
The freezing side condenser (second condenser) 22 and the freezing side solenoid valve 2
3 is a refrigerant pipe that communicates in series with the refrigerant pipe line 26 between the refrigerant pipe 3 and the pipe 3. That is, the heat exchanger 31 for subcooling on the freezing side and the refrigerant pipe 34
The configuration including a and is an example of the first cold heat supply circuit. And the 1st cold heat supply circuit which has the freezer side compressor (2nd compressor) 21, the freezing side condenser (2nd condenser) 22, the heat exchanger 31 for freezing side subcooling, and the freezing side expansion valve The (second expansion device) 24 and the freezing side evaporator (second evaporator) 25 are sequentially connected in an annular shape to form a second refrigerant circuit on the freezing side (or a second main circuit, hereinafter referred to as "the present specification"). The same) in. Then, on the freezing side, the second refrigerant circuit (second main circuit) itself constitutes the second refrigerant side cooled circuit on the freezing side (hereinafter the same in this specification). Further, in particular, in this combined refrigerant circuit facility, the refrigerating-side heat storage evaporator 8 of the refrigerating-side refrigerant circuit is also capable of transferring heat to the freezing-side subcooling heat exchanger 31 via the heat storage agent so that the heat storage tank 37 can be transferred.
It is deployed inside. Further, in this combined refrigerant circuit facility, the freezing side compressor (first compressor) 21,
Refrigeration side condenser (first condenser) 22, refrigeration side heat storage expansion valve (heat storage expansion device) and refrigeration side heat storage evaporator (heat storage heat exchanger) sequentially connected with a refrigerant circuit for heat storage (or, It does not have a subcircuit).

Next, the operation of the composite type refrigerant circuit equipment in this embodiment will be described. Here, for example, in the refrigeration side refrigerant circuit, the refrigeration side compressor 1 and the refrigeration side condenser 2
Is designed to cover a preset maximum load (an example of maximum refrigerating capacity) for the environment to be cooled (showcase, etc.), so if the load given to the showcase, etc. decreases, At that time, a surplus refrigerating capacity is generated as a difference from the load applied to the showcase or the like. According to this combined refrigerant circuit facility, an amount of the refrigerant liquid corresponding to the surplus refrigerating capacity is supplied to the refrigeration side heat storage evaporator 8 through the refrigeration side heat storage electromagnetic valve 9 and the refrigeration side heat storage expansion valve 10. As a result, the excess freezing capacity is stored as cold heat in the heat storage agent in the heat storage tank 37. On the other hand, in the refrigeration side refrigerant circuit, the high-temperature, high-pressure gas refrigerant compressed by the refrigeration side compressor 21 is liquefied by the refrigeration side condenser 22, and then the heat storage tank 37 is passed through the refrigeration side supercooling refrigerant pipe 34a. It is supplied to the heat exchanger 31 for subcooling on the freezing side and is cooled via the heat storage agent. As a result, the refrigerant cooled to a lower temperature is supplied to the freezing side evaporator 25 from the freezing side electromagnetic valve 23 and the like. In this way, as the extra refrigeration capacity, the cold heat stored in the heat storage agent of the heat storage tank 37 from the refrigeration side refrigerant circuit is consumed in the freezing side refrigerant circuit via the shared heat storage agent of the heat storage tank 37. Therefore, while the evaporation temperature of the refrigerant in the refrigerating side evaporator 5 is high, that is, the surplus cold heat is stored in the refrigerating side refrigerant circuit having high operation efficiency, this cold heat is stored in the refrigerating side evaporator 25. Low evaporation temperature,
That is, since it is used in the refrigeration side refrigerant circuit having low operating efficiency, it is possible to improve the overall refrigeration efficiency of the entire facility including the refrigeration side refrigerant circuit and the refrigeration side refrigerant circuit. Further, since only one heat storage tank is required, the structure related to the heat storage tank can be simplified.

In summary, the composite refrigerant circuit equipment according to the present embodiment has the following technical means. That is, in the composite refrigerant circuit facility according to the first embodiment, the first compressor, the first condenser, the first expansion device, and the first evaporator that cools the first cooled environment are sequentially annularly arranged. For storing heat, the first refrigerant circuit being connected to the first refrigerant circuit, and the first refrigerant circuit and the first evaporator being connected in parallel to the first refrigerant device A heat storage tank containing a refrigerant circuit and a heat storage agent for storing cold heat corresponding to the difference between the maximum refrigerating capacity of the first refrigerant circuit and the required refrigerating capacity of the first cooled environment via the heat storage heat exchanger. And the second compressor, the second condenser, the second expansion device, and the second evaporator that cools the second cooled environment whose temperature is lower than that of the first cooled environment. A second refrigerant circuit connected to the second refrigerant circuit, and a second refrigerant circuit connected between the second condenser and the second evaporator of the second refrigerant circuit. Those formed by and a first cold supply circuit having a cold from the heat agent cold supply heat exchanger for supplying the second refrigerant circuit.

Example 2. FIG. 2 is a block diagram showing a composite refrigerant circuit facility according to a second embodiment of the present invention, the configuration of which is almost the same as that of the first embodiment, except that the following components are provided. . In the refrigerating-side refrigerant circuit, 42 is a pressure detector (an example of a first refrigerating capacity detecting device) connected to the refrigerant pipe 6 on the suction side of the refrigerating-side compressor 1 to detect the suction pressure of the refrigerant gas, and 43 is a pressure detector. Vessel 42
A control device that performs a control calculation based on the pressure detection value detected in 4., 44 is a flow rate that adjusts the flow rate of the refrigerant that is provided in the refrigerant pipe 15 and that flows into the refrigeration side heat storage evaporator 8 based on the calculation result of the control device 43. A regulating valve (a configuration including the flow rate regulating valve 44 and the control device 43 is an example of a first refrigerant flow rate control device). In the refrigeration side refrigerant circuit,
Reference numeral 26a denotes a refrigerant pipe for circulating the refrigerant from the refrigeration side condenser 22 to bypass the refrigeration side subcooling heat exchanger (cooling heat supply heat exchanger) 31 and 45 denotes a suction side of the refrigeration side compressor 21. A pressure detector (an example of a second refrigerating capacity detecting device) connected to the refrigerant pipe and detecting the suction pressure of the refrigerant gas, 46
Is a control device that performs control calculation based on the pressure detection value detected by the pressure detector 45, and 57 is provided in the refrigerant pipe 26a and flows into the freezing side subcooling heat exchanger 31 based on the calculation result of the control device 46. A flow rate adjusting valve for adjusting the flow rate of the refrigerant (the flow rate adjusting valve 57, the control device 46, and the refrigerant pipe 26).
A configuration including a is an example of a second refrigerant flow rate control device).

Next, the operation of the composite refrigerant circuit equipment according to the second embodiment will be described. The basic refrigeration cycle operation of each refrigerant circuit in this composite refrigerant circuit facility is the same as that of the first embodiment. By the way, if the load on the environment to be cooled, that is, the refrigerating capacity applied to the environment to be cooled changes, the physical quantity (pressure on the suction side of the compressor, temperature of the environment to be cooled, etc.) corresponding thereto also changes. For example, when the load on the refrigeration side refrigerant circuit decreases, the surplus refrigerating capacity increases. Then, the pressure on the suction side of the refrigeration side compressor 1 changes in accordance with the surplus refrigerating capacity. The pressure at this time is detected by the pressure detector 42 and output to the control device 43 as a pressure detection value. Therefore, the control device 43 calculates the opening degree of the flow rate adjusting valve 44 based on the pressure detection value and outputs it to the flow rate adjusting valve 44 to increase the opening degree. As a result, an amount of refrigerant liquid equivalent to this surplus refrigerating capacity,
The cold heat of the refrigerant liquid is supplied to the heat exchanger 8 for cold storage on the cold storage side through the solenoid valve 9 for cold storage heat storage and the expansion valve 10 for cold storage heat storage, and the cold heat of the refrigerant liquid is stored in the heat storage agent of the heat storage tank 37. As described above, when the surplus capacity is large, the cold storage capacity is increased by increasing the opening degree of the flow rate adjusting valve 44 and increasing the amount of the refrigerant flowing into the refrigeration-side cold storage heat exchanger 8. vice versa,
For example, when the load on the refrigerating side refrigerant circuit increases and the surplus refrigerating capacity decreases, the opening degree of the flow rate adjusting valve 44 is reduced to reduce the amount of refrigerant flowing into the refrigerating side cold storage heat exchanger 8. As a result, the cold storage capacity can be reduced.
Thus, according to the composite refrigerant circuit facility of the second embodiment,
According to the surplus refrigerating capacity, it is possible to efficiently store the amount of cold heat corresponding to the surplus refrigerating capacity. Therefore, since the cold storage evaporator 8 does not excessively store the cold, the refrigeration capacity of the refrigeration evaporator 5 placed in the showcase or the like is not insufficient, and the cold storage evaporator 8 is stored in the showcase or the like. It does not raise the temperature of the refrigerated food or the like that has been stored to an inconvenient temperature.

On the other hand, also in the refrigerating side refrigerant circuit, as in the refrigerating side refrigerant circuit, efficient control can be performed. For example, when the load in the refrigerating-side refrigerant circuit increases and the required refrigerating capacity increases, the control device 46 calculates based on the pressure detection value from the pressure detector 45.
According to the output opening command, the opening of the flow rate adjusting valve 57 is reduced and the flow rate of the refrigerant to the freezing side subcooling heat exchanger 31 is increased. As a result, a large amount of cold heat of the heat storage tank 37 is used in the refrigeration side refrigerant circuit. On the contrary, when the load is reduced and the required refrigerating capacity is reduced, the opening degree of the flow rate adjusting valve 57 is increased and the refrigerant amount bypassing the refrigeration side subcooling heat exchanger 31 is increased. As described above, according to the composite refrigerant circuit facility of the second embodiment, according to the refrigerating capacity required in the refrigerating-side refrigerant circuit, the amount of cold heat corresponding to the necessary refrigerating capacity can be efficiently extracted from the heat storage agent. You can In this composite refrigerant circuit facility, each refrigerant circuit may be individually controlled, or both refrigerant circuits may be simultaneously controlled depending on the amount of heat stored in the heat storage tank 37.

In summary, the composite refrigerant circuit equipment according to this embodiment has the following technical means. That is, the composite refrigerant circuit facility according to the second embodiment includes a first refrigerant circuit, a heat storage refrigerant circuit, a heat storage tank, and
A first refrigerating capacity detecting device for detecting a physical quantity corresponding to a refrigerating capacity given to a first environment to be cooled in a system including a second refrigerant circuit and a first cold heat supply circuit; Refrigerant flow rate control for controlling the flow rate of the refrigerant from the first refrigerant circuit to the heat storage heat exchanger based on the difference between the maximum refrigerating capacity of the refrigerant circuit and the refrigerating capacity corresponding to the detected physical quantity And a device. Further, a second refrigerating capacity detection device for detecting a physical quantity corresponding to the refrigerating capacity given to the second cooled environment, and a maximum refrigerating capacity of the second refrigerant circuit and a refrigerating capacity corresponding to the detected physical quantity. And a second refrigerant flow rate control device that controls the flow rate of the refrigerant from the second refrigerant circuit to the heat exchanger for supplying cold heat based on the difference between

Example 3. FIG. 3 is a block diagram showing a composite refrigerant circuit facility according to a third embodiment of the present invention, which has almost the same configuration as that of the first and second embodiments, but has the following components. Different. In the refrigeration side refrigerant circuit, 8a is provided outside the heat storage tank 37 and a refrigeration side heat storage evaporator (heat storage heat exchanger) for storing excess cold heat of the refrigeration side refrigerant circuit, and 43a is a pressure detector 42. A control device for performing a control calculation based on the detected pressure value, 47 is a water pipe annularly connected to the heat storage tank 37 so as to pass through the refrigerating side heat storage evaporator 8a, and 48 is provided in the water pipe 47. A pump that circulates the water in the heat storage tank 37 to the refrigerating-side heat storage evaporator 8a (an example of the first heat storage agent circulating device is a configuration including the pump 48 and the water pipe 47), and 49 is a controller 43a. An inverter for controlling the rotation speed of the pump 48 based on the calculation result (this inverter 49 and the control device 4
A configuration including 3a is an example of a first heat storage agent circulation amount control device). In the refrigeration side refrigerant circuit, 31a
Is a heat exchanger for refrigeration-side supercooling (heat exchanger for supplying cold heat) which is provided outside the heat storage tank 37 and takes out cold heat to the refrigeration-side refrigerant circuit, and 46b indicates a pressure detection value detected by the pressure detector 45. A control device for performing control calculation based on 50, 50 is an annular heat storage tank 37 so as to pass through the freezing side subcooling heat exchanger 31a.
The water pipe 51 connected to the pump 51 is a pump which is provided in the water pipe 50 and circulates the water in the heat storage tank 37 to the heat exchanger 31a for the subcooling on the freezing side (a configuration including the pump 51 and the water pipe 50). An example of a second heat storage agent circulation device, 52 is an inverter for controlling the rotation speed of the pump 51 based on the calculation result of the control device 46b (a configuration including the inverter 52 and the control device 46b is a second configuration). It is an example of a heat storage agent circulation amount control device. The basic refrigeration cycle operation of each refrigerant circuit in this composite refrigerant circuit facility is the same as in the first and second embodiments.

Next, the operation of the composite refrigerant circuit equipment according to the third embodiment will be described. First, in the refrigerating-side refrigerant circuit, for example, when the load is reduced and surplus refrigerating capacity is generated, the refrigerant corresponding to the surplus refrigerating capacity passes through the refrigerating-side heat storage electromagnetic valve 9 and the refrigerating-side heat storage expansion valve 10 to the refrigerating side. It is supplied to the heat storage evaporator (heat storage heat exchanger) 8a. The refrigerant exchanges heat with the water flowing through the water pipe 47 in the refrigerating-side heat storage evaporator 8a by the pump 48, and is stored in the heat storage tank 37. The pressure on the suction side of the refrigeration side compressor 1 that changes corresponding to the excess refrigeration capacity is the pressure detector 42.
(First refrigerating capacity detection device). Therefore, when the surplus refrigerating capacity is large, the control device 43a controls the inverter 49 so as to increase the rotation speed of the pump 48 based on the pressure detection value. With this, by increasing the amount of water flowing through the refrigerating side heat storage evaporator 8a,
Cooling capacity is increased. On the contrary, when the surplus refrigerating capacity is small, the rotation speed of the pump 48 is reduced to reduce the amount of water flowing through the refrigerating side heat storage evaporator 8a.
The cold storage capacity is reduced. In this way, by controlling the circulation amount of water to the refrigeration side heat storage evaporator 8a according to the surplus refrigerating capacity, it is possible to efficiently store the amount of cold heat corresponding to the surplus refrigerating capacity. That is, as in the case of the second embodiment, the refrigerating side heat storage evaporator 8a is not excessively stored with cold, so that the refrigerating capacity given to the refrigerating side evaporator 5 placed in a showcase or the like is insufficient. In addition, the refrigerated food or the like stored in the showcase or the like is not heated to an inconvenient temperature.

On the other hand, in the refrigeration side refrigerant circuit, for example, when the load in the refrigeration side refrigerant circuit increases and the required refrigerating capacity increases, the pressure detector 45 (second refrigerating capacity detecting device). From the pressure detection value from the control device 46
Based on the calculation result of b, the inverter 52 is controlled so as to increase the rotation speed of the pump 51. by this,
By increasing the amount of water flowing through the freezing-side [cold storage] subcooling heat exchanger (cold heat supply heat exchanger) 31a, the amount of cold heat taken out to the freezing-side refrigerant circuit is increased. On the contrary, when the required refrigerating capacity becomes small, the rotation speed of the pump 51 is reduced to reduce the amount of water flowing through the refrigeration-side [cooling] subcooling heat exchanger 31a, thereby taking out cold heat. The amount is reduced. In this way, by controlling the circulation amount of water to the refrigeration side [heat storage evaporator] subcooling heat exchanger 31a according to the refrigeration capacity required in the refrigeration side refrigerant circuit, it is possible to obtain the required refrigeration capacity. It is possible to efficiently extract the amount of cold heat from water to be supplied to the refrigeration side refrigerant circuit. In this composite type refrigerant circuit facility, as in the case of the second embodiment, each refrigerant circuit may be individually controlled, or both refrigerant circuits may be controlled depending on the amount of heat stored in the heat storage tank 37. It is also possible to control them at the same time.

In summary, the composite refrigerant circuit equipment according to this embodiment has the following technical means. That is, the composite refrigerant circuit facility according to the third embodiment includes a first refrigerant circuit, a heat storage refrigerant circuit, a heat storage tank, and
In a system including a second refrigerant circuit and a first cold heat supply circuit, heat storage heat is provided by circulating a heat storage agent provided between the heat storage heat exchanger and the heat storage tank. A first heat storage agent circulation device for giving a refrigerant from the refrigerant of the exchanger to the heat storage agent, and a heat storage agent from the heat storage tank provided between the heat exchanger for cold heat supply and the heat storage tank are circulated to cool the heat storage agent. A second heat storage agent circulating device for applying cold heat to the refrigerant of the supply heat exchanger. In addition to the above, the composite refrigerant circuit equipment according to the third embodiment further includes a first refrigerating capacity detection device for detecting a physical quantity corresponding to the refrigerating capacity given to the first cooled environment, and a first refrigerating capacity detecting device. A first heat storage agent circulation amount control device for controlling the circulation amount of the heat storage agent by the first heat storage agent circulation device based on the difference between the maximum refrigeration capacity of the refrigerant circuit and the refrigeration capacity corresponding to the detected physical quantity. It will be done. Further, a second refrigerating capacity detecting device for detecting a physical quantity corresponding to the refrigerating capacity given to the second cooled environment,
A second heat storage agent circulation amount control device for controlling the circulation amount of the heat storage agent by the second heat storage agent circulation device based on the difference between the maximum refrigeration capacity of the second refrigerant circuit and the refrigeration capacity corresponding to the detected physical quantity. And is provided.

Example 4. Fourth Embodiment FIG. 4 is a configuration diagram showing a main part of a refrigeration side refrigerant circuit in a composite refrigerant circuit facility according to a fourth embodiment of the present invention. In the figure, this composite refrigerant circuit facility has a plurality of refrigeration side refrigerant circuits, and the basic refrigeration cycle circuit and freezing side refrigerant circuit of these refrigeration side refrigerant circuits are not shown. However, these are almost the same as those of the third embodiment, for example. In the combined refrigerant circuit facility according to the fourth embodiment, a plurality of refrigeration side heat storage evaporators (heat storage heat exchangers) 8a,
The refrigeration-side supercooling heat exchanger 11 a is provided outside the heat storage tank 37. Each refrigerating-side heat storage evaporator 8a is connected via the refrigerant pipe 15 to the refrigerant pipe 6 of the refrigerating-side refrigerant circuit of each system.
(See FIG. 3). Also,
Each refrigeration-side supercooling heat exchanger 11a is also connected to the refrigerant pipe 6 of each system via the refrigerant pipe 14 (see FIG. 9; in this case, the required refrigeration-side subcooling switching solenoid valves 12 and 13 are also not shown). It is connected in series. Further, each refrigeration side heat storage evaporator 8a, each refrigeration side subcooling heat exchanger 11a, and the heat storage tank 3
7 are connected in parallel in a circulating manner via water pipes 47a. Reference numeral 12a denotes a refrigeration side subcooling switching solenoid valve for intermittently controlling the supply of the refrigerant to each refrigeration side subcooling heat exchanger 11a.

Next, the operation of the composite refrigerant circuit equipment according to the fourth embodiment will be described. For example, when the load decreases in the refrigeration side refrigerant circuit of a certain system, the refrigerant liquid corresponding to the excess refrigerating capacity passes through the refrigeration side heat storage electromagnetic valve 9 and the refrigeration side heat storage expansion valve 10 of the system and evaporates for the refrigeration side heat storage. Is supplied to the container 8a. This refrigerant is heat-exchanged with the water flowing through the water pipe 47a in each heat exchanger 8a for heat storage on the refrigeration side by the pump 48, whereby the cold heat of the refrigerant is stored in the heat storage tank 37.
Is stored in cold. On the contrary, for example, when the load of a certain system increases and the refrigerating capacity becomes insufficient, the refrigeration-side supercooling switching solenoid valve 12a of the system is operated so that the high-temperature and high-pressure refrigerant is used for the refrigeration-side supercooling. It is supplied to the refrigeration-side supercooling heat exchanger 11a through the refrigerant pipe 14. Then, this refrigerant is cooled by exchanging heat with water flowing through the water pipe 47a in the refrigeration side subcooling heat exchanger 11a and the refrigeration side heat storage evaporator 8a of the respective systems by driving the pump 48. As a result, the cold heat stored in the water is taken out through the refrigeration-side supercooling heat exchanger 11a. In this case, even if there are systems with excess refrigeration capacity and systems with insufficient refrigeration capacity, the excess or deficiency of the refrigeration capacity in the refrigeration side refrigerant circuit of each system is due to the heat exchange for refrigeration side subcooling of each system. Water pipe 4 common to the cooler 11a and the refrigerating side heat storage evaporator 8a
Leveling is achieved by exchanging cold heat through water flowing through 7a. That is, the variation in the operating rate of the compressor for each system is also leveled. Therefore, it is possible to improve the refrigeration efficiency of the entire combined-type refrigerant circuit facility for refrigerating the refrigeration side refrigerant circuits of a plurality of systems. In addition, in the fourth embodiment, an example in which a plurality of refrigeration side refrigerant circuits are provided is shown, but it goes without saying that the invention can also be applied to a case where a plurality of systems refrigeration side refrigerant circuits are provided. Further, the invention can be applied to a system in which a plurality of refrigerating side refrigerant circuits and a plurality of refrigerating side circuits are provided. In this case, the water pipe connected to the heat storage tank 37 is connected to the refrigerating side (corresponding to the water pipe 47a) and the freezing side. By sharing with the other side, the efficiency of the entire equipment can be improved.

Example 5. 5 is a configuration diagram showing a refrigeration side refrigerant circuit in a composite type refrigerant circuit facility according to Embodiment 5 of the present invention. The same components as those of the embodiments described above are designated by the same reference numerals and the description thereof will be omitted. In the figure, 8b is a refrigeration side heat storage evaporator (heat storage heat exchanger) for storing excess cold heat in the refrigeration side refrigerant circuit in the heat storage tank 37. In particular, this refrigerating-side heat storage evaporator 8b contains a part of a plurality (here, three rows) of refrigerant pipes 15 connected in parallel to the refrigerant pipes 6 of the refrigerating-side refrigerant circuit. Further, a water pipe 47b which is arranged in the vicinity of the refrigerant pipe 15 so as to be capable of heat exchange is connected to the heat storage tank 37 in a circulating manner. Further, 43b performs control calculation based on the pressure detection value detected by the pressure detector (first refrigerating capacity detection device) 42 to control opening / closing of the refrigerating side heat storage solenoid valve 9 provided in each refrigerant pipe 15. It is a control device for doing.

Next, the operation of the composite refrigerant circuit equipment according to the fifth embodiment will be described. For example, when the load decreases in the refrigeration side refrigerant circuit, the refrigerant liquid corresponding to the surplus refrigerating capacity is supplied to the refrigeration side heat storage evaporator 8b through the respective refrigeration side heat storage electromagnetic valves 9 and the respective refrigeration side heat storage expansion valves 10. To be done. This refrigerant is heat-exchanged with water flowing through the water pipe 47b in the refrigerating side heat storage evaporator 8b by the pump 48, whereby cold heat of the refrigerant is stored in the heat storage tank 37. At this time, the pressure on the suction side of the refrigeration side compressor 1, which changes corresponding to the surplus refrigeration capacity, is detected by the pressure detector 42.
Therefore, when the surplus refrigerating capacity is large, the control device 4
Reference numeral 3b denotes each of the refrigeration side heat storage solenoid valves 9 so as to increase the number of refrigeration side heat storage solenoid valves 9 to be opened based on the pressure detection value.
The open / close signal is output to. As a result, the cool storage capacity is increased by increasing the total amount of the refrigerant flowing through the refrigerating-side heat storage evaporator 8b. On the contrary, when the surplus refrigerating capacity is small, the number of the refrigerating-side heat storage electromagnetic valves 9 to be opened is reduced to reduce the total amount of the refrigerant flowing through the refrigerating-side heat storage evaporator 8b, thereby reducing the cold storage capacity. Is reduced.
In this way, by controlling the flow rate of the refrigerant to the refrigeration side heat storage evaporator 8b according to the surplus refrigerating capacity, it is possible to receive the amount of cold heat from the refrigerant corresponding to the surplus refrigerating capacity. Moreover, the cold heat from the refrigerant is efficiently stored in the heat storage tank 37 by the water flowing through the water pipe 47b when the pump 48 is driven. This will not adversely affect refrigerated foods stored in showcases, etc.
It is the same as in the case of the above-described Embodiment 3 that the accuracy of maintaining the temperature of these refrigerated foods can be improved.
In the fifth embodiment, an example of storing the excess cold heat from the refrigeration side refrigerant circuit is shown, but it goes without saying that the present invention can also be applied to a configuration for taking out the cold heat from the heat storage tank 37 in the freezing side refrigerant circuit.

Example 6. 6 is a configuration diagram showing a refrigeration side refrigerant circuit in a composite type refrigerant circuit facility according to Embodiment 6 of the present invention. The same components as those of the embodiments described above are designated by the same reference numerals, and the description thereof will be omitted. In the figure, 8c is a refrigerating-side switching heat exchanger (heat storage heat exchanger / cumulative heat exchanger / cumulative heat exchanger / cumulative heat exchanger for storing excess cold heat in the refrigerating-side refrigerant circuit in the heat storage tank 37 and supplying cold heat in the heat storage tank 37 to the refrigerating-side refrigerant circuit. It is a heat exchanger for supercooling). The refrigerating-side switching heat exchanger 8c contains a part of the refrigerating-side heat storage refrigerant pipe 15 connected in parallel with the refrigerant pipe 6 of the refrigerating-side refrigerant circuit. In particular, refrigerating-side supercooling is performed on the pipe between the refrigerating-side heat storage expansion valve 10 of the refrigerant pipe 15 and the refrigerating-side switching heat exchanger 8c inlet side, and on the refrigerating-side switching heat exchanger 8c outlet side. Refrigerant pipes 14 are branched and connected. The configuration provided with the refrigerating-side supercooling refrigerant pipe 14 and the refrigerating-side switching heat exchanger 8c is an example of a second cold-heat supply circuit. Further, reference numeral 12b is a refrigeration side switching solenoid valve for connecting and disconnecting the circulation of the refrigerant in the refrigerant pipe 15, and reference numerals 12 and 13 are refrigeration side supercooling switching solenoid valves.

Next, the operation of the composite refrigerant circuit equipment according to the sixth embodiment will be described. First, in the refrigeration side refrigerant circuit, the refrigeration side subcooling switching solenoid valves 12 and the refrigeration side switching solenoid valves 12b (each an example of a circuit opening / closing device) are closed, and the refrigeration side subcooling switching electromagnetic valve 13 (an example of a circuit opening / closing device). When the operation of the refrigerating cycle is started in the state where) is opened, the refrigerating side evaporator 5 cools the showcase and the like. Then, when the load is reduced and surplus refrigeration capacity is generated, a control device (not shown) (an example of a refrigerant flow path control device) is shown.
Thus, the refrigerating side switching solenoid valve 12b is opened. As a result, the refrigerant from the refrigeration side condenser 2 is guided to the refrigeration side heat storage refrigerant pipe 15 and flows into the refrigeration side heat exchanger 8c through the refrigeration side heat storage solenoid valve 9 and the refrigeration side heat storage expansion valve 10. Excessive cold heat is stored in the heat storage tank 37 by exchanging heat with the water flowing through the water pipe 47. That is, in this case, the refrigerating-side switching heat exchanger 8c functions as a refrigerating-side heat storage evaporator.

On the contrary, when the load increases and exceeds the original maximum refrigerating capacity of the refrigeration side refrigerant circuit, each refrigeration side subcooling switching solenoid valve 12 is opened, and the refrigeration side subcooling switching solenoid valve 13 and the refrigeration side switching solenoid are opened. The valve 12b is closed. As a result, the refrigerant from the refrigeration side condenser 2 flows into the refrigeration side switching heat exchanger 8c through the refrigerant pipe 14 and flows into the water pipe 47 (this water pipe 4).
7 and the pump 48 constitute a first heat storage agent circulating device, and heat is exchanged with water flowing through the heat storage agent circulation device 3.
After being cooled by receiving the cold heat of No. 7, it is guided to the refrigeration side evaporator 5. That is, in this case, the refrigeration-side switching heat exchanger 8c is
Functions as a heat exchanger for supercooling on the refrigeration side. At this time, depending on the relative relationship between the refrigeration capacity controllable range by the refrigeration side expansion valve 4, the heat exchange capacity in the refrigeration side evaporator 5, and the load amount, the refrigerant is in a liquid state without being completely evaporated in the refrigeration side evaporator 5. Therefore, there is a case in which it is sucked into the refrigeration side compressor 1 into an inconvenient state. In such a state, the control device 43a calculates and detects this state based on the pressure detection value from the pressure detector 42 (first refrigerating capacity detection device), and the inverter 49 (according to the detection result). The inverter 49 and the control device 43a constitute a first heat storage agent circulation amount control device) and the pump 48 to control the water circulation amount to the refrigeration side switching heat exchanger 8c. As a result, the subcooling capacity of the refrigeration-side switching heat exchanger 8c for the refrigerant is adjusted. As a result, it is possible to avoid the disadvantage that the refrigerant is sucked into the refrigeration side compressor 1 in a liquid state. As described above, according to the composite refrigerant circuit facility according to this embodiment, the functions of the refrigerating-side switching heat exchanger 8c are the same as those of the heat storage evaporator and the supercooling heat exchanger depending on the load amount. Since it is switched to the function, one refrigerating-side switching heat exchanger 8c can be shared as a heat storage evaporator and a supercooling heat exchanger. Therefore, the manufacturing cost of the initials related to the heat exchanger can be reduced. Further, since the amount of supercooling is controlled according to the operating state at that time while detecting the operating state at the time of supercooling, it is possible to prevent the refrigerant from returning to the refrigeration side compressor 1 in the liquid state, and thus the device of the embodiment. Improves reliability. In addition, although the example of the refrigeration side refrigerant circuit has been shown in the sixth embodiment, such a configuration can be applied to the freezing side refrigerant circuit.

Example 7. FIG. 7 is a configuration diagram showing a refrigerating-side refrigerant circuit in a composite refrigerant circuit facility according to Embodiment 7 of the present invention. The same components as those of the embodiments described above are designated by the same reference numerals, and the description thereof will be omitted. In the figure, 53 is a temperature detector (an example of a heat storage amount detecting device) that is arranged in the heat storage tank 37 to detect the temperature of the water in the heat storage tank 37, and 54 is each refrigerating unit based on a detection signal from the temperature detector 53. It is a control device (an example of a refrigerant flow path control device) that controls opening / closing of the side supercooling switching solenoid valve 12, the refrigeration side supercooling switching solenoid valve 13, and the refrigeration side switching solenoid valve 12b.

Next, the operation of the composite refrigerant circuit equipment according to this embodiment will be described. Since the volume of water in the heat storage tank 37 is constant, the amount of cold storage in the heat storage tank 37 can be easily obtained from the temperature of the water in the heat storage tank 37. However, particularly when the amount of cold storage in the heat storage tank 37 is too small, for example, when the refrigerating side refrigerant circuit requires refrigerating capacity, the necessary supercooling of the refrigerant cannot be sufficiently performed at this time. Therefore, for example, when the minimum amount of cold storage in the heat storage tank 37 is set in advance and the amount of cold storage in the heat storage tank 37 is below the amount of cold storage equivalent to the minimum amount of cold storage and there is a margin in the refrigerating capacity of the refrigeration side refrigerant circuit, The control device 54 closes each refrigeration side subcooling switching solenoid valve 12 and opens the refrigeration side subcooling switching solenoid valve 13 and the refrigeration side switching solenoid valve 12b. As a result, the refrigeration side switching heat exchanger 8
c functions as a heat storage evaporator (heat storage heat exchanger) by the heat storage refrigerant circuit, and the surplus cold heat in the refrigeration side refrigerant circuit is first
The heat is stored in the heat storage tank 37 via the water pipe 47 and the pump 48, which are the heat storage agent circulation devices.

On the other hand, when the amount of cold storage in the heat storage tank 37 becomes equal to or more than the amount of cold storage corresponding to the minimum amount of cold storage, the controller 54 opens each of the refrigerating-side supercooling switching solenoid valves 12 and at the same time, the refrigerating-side supercooling switching solenoids are opened. The valve 13 and the refrigerating side switching solenoid valve 12b are closed. As a result, the refrigerating-side switching heat exchanger 8c functions as a supercooling heat exchanger for taking out cold heat,
The cold heat of the heat storage tank 37 is applied to the refrigerant in the refrigerant pipe 14 of the second cold heat supply circuit via the water pipe 47 and the pump 48 which are the first heat storage agent circulating device. The refrigerant thus cooled is sequentially supplied to the refrigeration side solenoid valve 3, the refrigeration side expansion valve 4, and the refrigeration side evaporator 5, thereby supplementing the refrigerating capacity required in the refrigeration side refrigerant circuit. Thus, according to the composite refrigerant circuit facility according to this embodiment, the functions of the refrigerating-side switching heat exchanger 8c are the functions of the heat storage evaporator and the supercooling heat depending on the amount of cold storage in the heat storage tank 37. Since it is switched to the function of the exchanger, one refrigerating-side switching heat exchanger 8c can be commonly used as a heat storage evaporator or a supercooling heat exchanger in a switchable manner. Therefore, the manufacturing cost of the initials related to the heat exchanger can be reduced.

In summary, the composite refrigerant circuit equipment according to the present embodiment has the following technical means. That is, the composite refrigerant circuit facility according to the seventh embodiment includes a first refrigerant circuit, a heat storage refrigerant circuit, a heat storage tank, and
In a device including a second refrigerant circuit and a first cold heat supply circuit, the first refrigerant circuit is connected in series between the first condenser and the first expansion device, and the flow passage is opened and closed. A free circuit switch is provided, and the refrigerant from the first condenser is diverted to the heat storage heat exchanger to cool the heat storage agent in the heat storage tank.
Second cold heat supply circuit for supplying to the refrigerant circuit, a heat storage amount detection device for detecting the heat storage amount of the heat storage agent in the heat storage tank, and a circuit opening / closing device for opening and closing the refrigerant based on the detected heat storage amount of the heat storage agent. And a refrigerant flow path control device for switching the flow path of (1) to the heat storage refrigerant circuit and the second cold heat supply circuit.

Example 8. 8 is a block diagram showing a composite refrigerant circuit facility according to Embodiment 8 of the present invention. In the drawing, the same components as those of the respective embodiments described so far are designated by the same reference numerals, and the description thereof will be omitted. The composite refrigerant circuit equipment according to this embodiment has substantially the same basic configuration as the composite refrigerant circuit equipment according to the embodiment 1 shown in FIG. 1, and the difference in the configuration also has the function of the refrigeration side condenser. Refrigeration side supercooling heat exchanger (cold heat supply heat exchanger) 31a
Was placed in the heat storage tank 37 in place of the heat exchanger 31 for subcooling on the freezing side (see FIG. 1), and accordingly, the condenser 22 on the freezing side (second condenser) (see FIG. 1). ) Is omitted.

The basic operation of the composite refrigerant circuit facility according to this embodiment is almost the same as that of the first embodiment. Therefore, the cold heat stored in the heat storage tank 37 from the refrigeration side refrigerant circuit is consumed in the freezing side refrigerant circuit. As already described, the cold heat is stored in the refrigeration side refrigerant circuit having a high refrigerant evaporation temperature in the refrigeration side evaporator 5, that is, a high refrigeration efficiency, and has a low refrigerant evaporation temperature in the refrigeration side evaporator 25, that is, a refrigeration efficiency. Used in low refrigeration side refrigerant circuits. In this case, in the heat exchanger 31a for subcooling on the freezing side, in particular, the high temperature refrigerant from the compressor 21 on the freezing side is directly heat-exchanged with the water in the heat storage tank 37 to be condensed and further supercooled, so that the heat storage The cold heat of the tank 37 can be efficiently used. In addition, since the freezing-side supercooling heat exchanger 31a serves as both the freezing-side condenser and the freezing-side supercooling heat exchanger, it is possible to reduce the initial manufacturing cost of the heat exchanger.

In summary, the composite refrigerant circuit equipment according to the present embodiment takes the following technical means. That is, in the composite refrigerant circuit facility according to the eighth embodiment, the first compressor, the first condenser, the first expansion device, and the first evaporator that cools the first cooled environment are sequentially annularly arranged. For storing heat, the first refrigerant circuit being connected to the first refrigerant circuit, and the first refrigerant circuit and the first evaporator being connected in parallel to the first refrigerant device A heat storage tank containing a refrigerant circuit and a heat storage agent for storing cold heat corresponding to the difference between the maximum refrigerating capacity of the first refrigerant circuit and the required refrigerating capacity of the first cooled environment via the heat storage heat exchanger. And the second compressor, the second condenser, the second expansion device, and the second evaporator that cools the second cooled environment whose temperature is lower than that of the first cooled environment. In a combined refrigerant circuit facility including a second refrigerant circuit connected to the second condenser circuit, the second condenser is configured to cool the heat from the heat storage agent. It is characterized in that provided to allow the heat storage tank fed to the second refrigerant circuit.

[0076]

Since the present invention is constructed as described above, it has the following effects.

Excess cold heat from the high-cooling temperature side (first) refrigerant circuit having high refrigeration efficiency between the plurality of refrigerant circuits for respectively cooling a plurality of environments to be cooled having different cooling temperatures is stored in the heat storage tank. Since the refrigerant circuit is moved to the low cooling temperature side (second) refrigerant circuit with low refrigeration efficiency via the agent, it is possible to improve the overall refrigeration efficiency of the entire equipment.

Further, depending on the surplus cold heat quantity of the refrigerant circuit on the high cooling temperature side (first) (corresponding to the physical quantity such as the inlet pressure of the (first) compressor and the environment temperature to be cooled), the heat storage Since the amount of refrigerant flowing from the first refrigerant circuit to the heat exchanger is controlled, the amount of accumulated cold heat can be controlled.
Therefore, for example, the heat is not excessively stored in the heat exchanger for cold storage, so that the refrigerating capacity provided to the refrigerating side evaporator placed in the first environment to be cooled does not become insufficient, and the first heat is not stored. It does not raise the temperature of the cooling environment to a temperature that is inconvenient for it.

On the contrary, according to the insufficient refrigerating capacity of the refrigerant circuit on the low cooling temperature side (second) (corresponding to the physical quantity such as the inlet pressure of the (second) compressor or the environment temperature to be cooled), Since the amount of refrigerant flowing from the second refrigerant circuit to the heat storage heat exchanger is controlled, the amount of cold heat received from the heat storage tank can be controlled.

Further, since the heat storage agent from the heat storage tank is forcibly circulated toward each of the heat storage heat exchanger and the cold heat supply heat exchanger for sending and receiving cold heat to and from the heat storage agent, It is possible to improve the movement efficiency.

Since the circulation amount of the heat storage agent from the heat storage tank to the heat storage heat exchanger is controlled according to the surplus cold heat amount in the first refrigerant circuit, the surplus cold heat storage amount is controlled. Can be controlled.

On the contrary, since the circulation amount of the heat storage agent from the heat storage tank to the heat exchanger for supplying cold heat is controlled according to the refrigerating capacity that is insufficient in the second refrigerant circuit, You can control how much you cover.

Further, one heat storage heat exchanger connected to the first refrigerant circuit is rationally used as a heat storage evaporator or a supercooling heat exchanger depending on the amount of heat stored by the heat storage agent. Since they are used properly, the manufacturing cost of the initials for the heat exchanger can be reduced.

Since the refrigerant in the second condenser of the second refrigerant circuit and the heat storage agent in the heat storage tank are heat-exchanged, the cold heat stored in the heat storage tank can be efficiently used. In addition, since the second condenser also serves as the original condenser and the heat exchanger for supercooling, the manufacturing cost of the initials for the heat exchanger can be reduced.

[Brief description of drawings]

FIG. 1 is a configuration diagram showing a composite refrigerant circuit facility according to a first embodiment of the present invention.

FIG. 2 is a configuration diagram showing a composite refrigerant circuit facility according to a second embodiment of the present invention.

FIG. 3 is a configuration diagram showing a composite refrigerant circuit facility according to a third embodiment of the present invention.

FIG. 4 is a configuration diagram showing a main part of a refrigeration side refrigerant circuit in a composite refrigerant circuit facility according to Example 4 of the present invention.

FIG. 5 is a configuration diagram showing a refrigeration side refrigerant circuit in a composite type refrigerant circuit facility according to Embodiment 5 of the present invention.

FIG. 6 is a configuration diagram showing a refrigeration side refrigerant circuit in a composite type refrigerant circuit facility according to Embodiment 6 of the present invention.

FIG. 7 is a configuration diagram showing a refrigerating-side refrigerant circuit in a composite refrigerant circuit facility according to Embodiment 7 of the present invention.

FIG. 8 is a configuration diagram showing a composite refrigerant circuit facility according to an eighth embodiment of the present invention.

FIG. 9 is a configuration diagram showing a conventional composite refrigerant circuit facility.

[Explanation of symbols]

1 Refrigeration side compressor (first compressor) 2 Refrigeration side condenser (first condenser) 3 Refrigeration side solenoid valve 4 Refrigeration side expansion valve (first expansion device) 5 Refrigeration side evaporator (first Evaporator) 6 Refrigerant piping 8 Refrigerator side heat storage evaporator (heat storage heat exchanger) 8a Refrigeration side heat storage evaporator (heat storage heat exchanger) 8b Refrigeration side heat storage evaporator (heat storage heat exchanger) 8c Refrigeration Side switching type heat exchanger (heat storage heat exchanger) 9 Refrigeration side heat storage electromagnetic valve 10 Refrigeration side heat storage expansion valve (heat storage expansion device) 12 Refrigeration side supercooling switching solenoid valve 12b Refrigeration side switching solenoid valve 13 Refrigeration side Supercooling switching solenoid valve 14 Refrigerant pipe 15 Refrigerant pipe 21 Refrigeration side compressor (second compressor) 22 Refrigeration side condenser (second condenser) 23 Refrigeration side solenoid valve 24 Refrigeration side expansion valve (second throttle) Device 25 Refrigerator side evaporator (second evaporator) 26 Refrigerant pipe 26a Refrigerant pipe 31 Freezing side supercooling heat exchanger (cold heat supply heat exchanger) 31a Freezing side subcooling heat exchanger (cooling heat supply heat exchanger) 34a Refrigerant pipe 37 Heat storage tank 42 Pressure detector (first refrigerating capacity detection) Device 43 Control device (first refrigerant flow rate control device) 43a Control device 43b Control device 44 Flow rate adjustment valve 45 Pressure detector (second refrigerating capacity detection device) 46 Control device (second refrigerant flow rate control device) ) 46b Control device 47 Water pipe 47b Water pipe 48 Pump (first heat storage agent circulation device) 49 Inverter 50 Water pipe 51 Pump (second heat storage agent circulation device) 52 Inverter 53 Temperature detector 54 Control device 57 Flow control valve

─────────────────────────────────────────────────── ─── Continuation of front page (72) Inventor Masaki Ikeuchi 2-3-3 Marunouchi, Chiyoda-ku, Tokyo Mitsubishi Electric Corporation Stock company (72) Inventor Koichi Negoro 2-3-2 Marunouchi, Chiyoda-ku, Tokyo Mitsubishi Electric Stock Company In-house (72) Inventor Koichi Ohata 2-3-3 Marunouchi, Chiyoda-ku, Tokyo Mitsubishi Electric Stock Company In-house (72) Inventor Tadaaki Nakano 2-3 2-3 Marunouchi, Chiyoda-ku, Tokyo Internal Company ( 56) References JP-A-64-6650 (JP, A) JP-A-2-251051 (JP, A) JP-A-3-255852 (JP, A) JP-A-64-90962 (JP, A) JP-A Flat 5-52435 (JP, A) (58) Fields investigated (Int.Cl. ⁷ , DB name) F25B 5/00 F25B 1/00 321 F25B 1/00 397

Claims (26)

(57) [Claims] 1. A first compressor, a first condenser, a first expansion device, and a first evaporator for cooling a first environment to be cooled are sequentially connected by piping, and the first expansion device is also provided. And a heat storage expansion device and a heat storage heat exchanger connected in parallel with the first evaporator, and the first compressor, the first condenser, the heat storage expansion device, and the heat storage heat exchange. A first refrigeration-side refrigerant circuit on the refrigerating side, which is formed by sequentially connecting pipes to each other, a second compressor, a second condenser, a heat exchanger for supplying cold heat, a second expansion device, and the first cooling device. A second refrigeration-side refrigerant circuit on the freezing side, in which a second evaporator that cools the second refrigeration environment that is lower in temperature than the refrigeration environment is connected in sequence, and a heat storage tank that stores a heat storage agent And the heat storage heat exchanger and the cold heat supply heat exchanger
The second refrigerant to be cooled is provided in the heat storage tank.
The circuit should have a heat exchanger for heat storage installed in the heat storage tank.
Without the cold heat of the first of the cooling-side refrigerant circuit and the cold storage in the heat storage agent of the heat storage tank through the heat storage heat exchanger, the cold heat said are cold storage through the cold feed heat exchanger A composite refrigerant circuit facility characterized by supplying to a second cooled side refrigerant circuit. 2. A main circuit, in which a first compressor, a first condenser, a first expansion device, and a first evaporator for cooling a first cooled environment are sequentially connected by piping, and The first expansion device and the first evaporator are connected in parallel with the expansion device for heat storage and the heat exchanger for heat storage, and the first compressor, the first condenser, the expansion device for heat storage, and the heat storage device. A first refrigeration-side refrigerant circuit on the refrigeration side, which has a sub-circuit in which heat storage heat exchangers are sequentially connected by piping, a second compressor, a second condenser, a cold heat supply heat exchanger, and The second refrigerating side having only the main circuit formed by sequentially connecting the second expansion device and the second evaporator for cooling the second cooled environment, which has a temperature lower than that of the first cooled environment, in sequence. The cooling target side refrigerant circuit and a heat storage tank that stores a heat storage agent are provided, and the heat storage heat exchanger and the cold heat supply heat exchanger are
The second refrigerant to be cooled is provided in the heat storage tank.
The circuit should have a heat exchanger for heat storage installed in the heat storage tank.
Without the cold heat of the first of the cooling-side refrigerant circuit and the cold storage in the heat storage agent of the heat storage tank through the heat storage heat exchanger, the cold heat said are cold storage through the cold feed heat exchanger A composite refrigerant circuit facility characterized by supplying to a second cooled side refrigerant circuit. 3. A first compressor, a first condenser, a first expansion device, and a first evaporator which cools a first environment to be cooled are sequentially connected in an annular form to one or more systems. The first refrigerating side having a first refrigerant circuit and a heat storage refrigerant circuit in which the first compressor, the first condenser, the heat storage expansion device, and the heat storage heat exchanger are sequentially connected A cooled side refrigerant circuit, a heat storage tank that accommodates a heat storage agent inside of which the heat storage heat exchanger is provided and stores cold heat through the heat storage heat exchanger by the heat storage refrigerant circuit; machine, a second condenser, is deployed in the storage tank
A first cold heat supply circuit having a cold heat supply heat exchanger that supplies cold heat from the heat storage agent, a second expansion device, and a second cooled environment that is lower in temperature than the first cooled environment. And a second refrigerant circuit of one or more systems in which a second evaporator for cooling is sequentially connected in an annular shape, and the second compressor, the second condenser, and another heat storage expansion device, no thermal storage refrigerant circuit formed by sequentially connecting the heat storage heat exchanger, the refrigeration
Side second cooled side refrigerant circuit, and a composite type refrigerant circuit facility characterized by the above-mentioned. 4. A subcooling heat exchanger connected between a first condenser and a first expansion device of the first refrigerant-side refrigerant circuit, the subcooling heat exchanger comprising: 4. The combined refrigerant circuit equipment according to claim 1, wherein cold heat of the heat storage agent in the heat storage tank is supplied to the refrigerant from the first condenser via the heat exchanger. 5. The composite according to claim 1, wherein the heat storage heat exchanger is housed in the heat storage tank, and the refrigerant of the heat storage refrigerant circuit directly exchanges heat with the heat storage agent. Type refrigerant circuit equipment. 6. The heat storage agent provided between the heat storage heat exchanger and the heat storage tank is circulated to the heat storage heat exchanger to circulate the heat storage agent in the heat storage heat exchanger to generate heat and heat in the heat storage refrigerant circuit. The composite type refrigerant circuit equipment according to claim 1, further comprising a first heat storage agent circulating device to be replaced. 7. A first refrigerating capacity detecting device for detecting refrigerating capacity of the first refrigerant circuit, and a flow rate of the refrigerant in the heat accumulating refrigerant circuit based on an output of the first refrigerating capacity detecting device. The composite refrigerant circuit equipment according to any one of claims 1 to 6, further comprising: a first refrigerant flow rate control device for controlling. 8. The first refrigerating capacity detection device detects refrigerating capacity given to the first environment to be cooled, and the first refrigerant flow rate control device controls maximum refrigeration of the first refrigerant circuit. The combined refrigerant circuit equipment according to claim 7, wherein the flow rate of the refrigerant in the refrigerant circuit for heat storage is controlled based on a difference between the capacity and the detected refrigerating capacity. 9. A first refrigerating capacity detecting device for detecting refrigerating capacity of the first refrigerant circuit, and the first refrigerating capacity detecting device based on an output of the first refrigerating capacity detecting device.
7. The first heat storage agent circulation amount control device for controlling the flow rate of the refrigerant of the heat storage agent circulation device according to claim 6.
The composite refrigerant circuit facility described in. 10. The first refrigerating capacity detector is used to detect the refrigerating capacity given to the first environment to be cooled, and the first heat storage agent circulation amount control device is used to detect the maximum of the first refrigerant circuit. The combined refrigerant circuit equipment according to claim 9, wherein the circulation amount of the heat storage agent by the first heat storage agent circulating device is controlled based on a difference between the refrigerating capacity and the detected refrigerating capacity. 11. The cold heat of the heat storage agent in the heat storage tank is supplied to the refrigerant from the first condenser, which is connected between the first condenser and the first expansion device of the first refrigerant circuit. The composite refrigerant circuit equipment according to any one of claims 1 to 10, further comprising a second cold heat supply circuit including a heat exchanger for supercooling. 12. The supercooling heat exchanger is housed in the heat storage tank, and the refrigerant from the first condenser directly exchanges heat with the heat storage agent in the heat storage tank.
The composite refrigerant circuit facility described in. 13. The first condenser by interposing a heat storage agent provided between the heat exchanger for supercooling and the heat storage tank from the heat storage tank and circulating the heat storage agent to the heat exchanger for supercooling. The combined-type refrigerant circuit equipment according to claim 11, further comprising a first heat storage agent circulating device for exchanging heat with the refrigerant from. 14. A heat storage agent provided between the heat storage heat exchanger and the heat storage tank is circulated to the heat storage heat exchanger by circulating the heat storage agent from the heat storage tank to the refrigerant of the heat storage refrigerant circuit. A first heat storage agent circulation device for heat exchange, and a first heat exchanger for heat storage connected between the first condenser and the first expansion device of the first refrigerant circuit, and from the first condenser. A second cold heat supply circuit that supplies the cold heat of the heat storage agent of the heat storage tank to the refrigerant, and a refrigerant flow path control device that switches between the heat storage refrigerant circuit and the second cold heat supply circuit. The composite refrigerant circuit equipment according to claim 1. 15. A first refrigerating capacity detecting device for detecting refrigerating capacity of the first refrigerant circuit, and the first refrigerating capacity detecting device based on an output of the first refrigerating capacity detecting device.
And a first heat storage agent circulation amount control device for controlling the flow rate of the refrigerant of the heat storage agent circulation device.
4. The composite refrigerant circuit facility according to item 4. 16. A heat storage amount detection device for detecting a heat storage amount of a heat storage agent in the heat storage tank, wherein the refrigerant flow path control device is configured to output the heat storage refrigerant circuit and the second heat storage device based on an output of the heat storage amount detection device. 15. The combined refrigerant circuit equipment according to claim 14, wherein the cold heat supply circuit is switched to the cold heat supply circuit. 17. The second Te the cooled-side refrigerant circuit odor <br/>, all the cold refrigerant in the second of the cooling-side refrigerant circuit
The composite refrigerant circuit equipment according to any one of claims 1 to 16, wherein the composite refrigerant circuit equipment is arranged to be circulated in a heat exchanger for heat supply . 18. A bypass circuit is provided in the second refrigerant circuit, in parallel with the first cold heat supply circuit, so as to controllably divert the refrigerant from the second condenser to the second expansion device. The composite refrigerant circuit equipment according to any one of claims 1 to 16, characterized in that. 19. The heat exchanger for supplying cold heat is housed in the heat storage tank, and the refrigerant in the second refrigerant circuit directly exchanges heat with the heat storage agent in the heat storage tank.
Alternatively, the composite refrigerant circuit facility according to item 18. 20. The heat storage agent provided between the cold heat supply heat exchanger and the heat storage tank is circulated to the cold heat supply heat exchanger to circulate the second cooled object. ~ side
Composite refrigerant circuit installation according to claim 17 or 18, further comprising a second heat storage agent circulation apparatus for coolant heat exchanger of the refrigerant circuit. 21. A second refrigerating capacity detecting device for detecting refrigerating capacity of the second refrigerant circuit, and the first refrigerating capacity detecting device based on an output of the second refrigerating capacity detecting device.
19. The composite refrigerant circuit equipment according to claim 18, further comprising: a second refrigerant flow rate control device that controls the flow rate of the refrigerant in the cold heat supply circuit. 22. The second refrigerating capacity detecting device detects a refrigerating capacity given to the second environment to be cooled, and the second refrigerant flow rate controlling device detects the maximum refrigerating capacity of the second refrigerant circuit. 22. The combined refrigerant circuit equipment according to claim 21, wherein the flow rate of the refrigerant in the first cold heat supply circuit is controlled based on the difference between the capacity and the detected refrigerating capacity. 23. A second refrigerating capacity detecting device for detecting refrigerating capacity of the second refrigerant circuit, and the second refrigerating capacity detecting device based on an output of the second refrigerating capacity detecting device.
2. A second heat storage agent circulation amount control device for controlling the flow rate of the refrigerant in the heat storage agent circulation device according to claim 2.
The composite refrigerant circuit facility according to 0. 24. The refrigerating capacity given to the second environment to be cooled is detected by the second refrigerating capacity detecting device, and the maximum of the second refrigerant circuit is controlled by the second heat storage agent circulation amount controlling device. The combined refrigerant circuit equipment according to claim 23, wherein the circulation amount of the heat storage agent by the second heat storage agent circulating device is controlled based on a difference between the refrigeration capacity and the detected refrigeration capacity. 25. One or more systems, in which a first compressor, a first condenser, a first expansion device, and a first evaporator for cooling a first environment to be cooled are sequentially connected in an annular shape. First on the refrigeration side
Refrigerant circuit, a heat storage refrigerant circuit in which the first compressor, the first condenser, a heat storage expansion device, and a heat storage heat exchanger are sequentially connected, and the heat storage refrigerant circuit is used to store the heat. First cold heat supply having a heat storage tank containing a heat storage agent for storing cold heat via a heat exchanger, a second compressor, and a heat exchanger for supplying cold heat for supplying cold heat from the heat storage agent in the heat storage tank One or more refrigeration sides in which a circuit, a second expansion device, and a second evaporator that cools a second cooled environment that is lower in temperature than the first cooled environment are sequentially connected in an annular shape. And a second heat exchanger for storing heat and the heat exchanger for supplying cold heat.
The second refrigerant circuit is installed in the heat storage tank
The heat exchanger for heat storage provided in the heat storage tank is not provided, and the heat exchanger for supplying cold heat is caused to function as the condenser of the second refrigerant circuit, and the heat of the first refrigerant circuit to be cooled is cooled. To
Cold storage in the heat storage agent of the heat storage tank via the heat storage heat exchanger
Then, the stored cold heat is passed through the cold heat supply heat exchanger.
And supplying it to the second cooled side refrigerant circuit . 26. The refrigerant evaporation temperature of the first evaporator in the first refrigerant circuit is set higher than the refrigerant evaporation temperature of the second evaporator in the second refrigerant circuit. The composite refrigerant circuit facility according to any one of 1 to 25.