JPH11325613A - Regenerative refrigerator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a regenerative refrigerator efficiently and economically enabling the reduction of power consumption and variations during power peak. SOLUTION: A normal refrigeration cycle composed of a compressor 401, condenser 402, first expansion valve 202 and evaporator 203, heat storing refrigeration cycle composed of the compressor 401, condenser 402, second expansion valve 205, heat storing heat exchanger 206, and suction pressure adjust valve 500, and supercooling refrigeration cycle composed of the compressor 401, condenser 402, heat storing heat exchanger 206, first expansion valve 202 and evaporator 203 are provided. At a cold holding operation mode the suction pressure adjust valve 500 opens to hold a heat storage medium 211 cold, when the refrigeration load is lightened. At a supercooling operation mode, the refrigerant is supercooled by the heat storage heat exchanger 206 and flows into the first expansion valve 202 and evaporator 203. This improves the refrigeration power to improve the operating efficiency of the compressor 401 and reduce the power consumption.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a refrigerating apparatus used for cooling a refrigerating showcase or the like installed in a store or the like, and more particularly, to a regenerative apparatus provided with a regenerative material for varying the load on a compressor. The present invention relates to a refrigerating apparatus.

[0002]

2. Description of the Related Art In recent years, the demand for electric power has been concentrated particularly during the daytime in summer, and it is an industry problem to reduce the maximum electric power demand efficiently and economically in order to reduce the electric power consumption at the peak time. there were. In order to solve this problem, various regenerative refrigeration systems as described above have been developed. Here, a conventional regenerative refrigerator of this type is disclosed in
The one disclosed in JP-A-133661 is known. This conventional regenerative refrigerator will be described with reference to FIG. FIG. 4 is a refrigerant circuit diagram illustrating a refrigeration cycle of a conventional regenerative refrigerator.

The regenerative refrigeration system 1 has a plurality of refrigeration systems 2 and an ice heat storage tank 20 common to each refrigeration system 2. Each refrigerating device 2 sequentially connects a compressor 5, a condenser 6, a first solenoid valve 7, a first expansion valve 8, and the evaporator 4 to an evaporator 4 arranged in a refrigerating showcase 3 serving as a load. It has a normal refrigeration cycle. A condenser fan 9 is installed in the vicinity of the condenser 6 to cool the condenser 6 at a high temperature. In addition, from the condenser 6, the second solenoid valve 10, the second expansion valve 11, the water heat exchanger 1
A cycle in which the two- and three-way switching valve 13 and the compressor 5 are sequentially connected is provided, and the second solenoid valve 10 and the second
A third solenoid valve (14) is provided to bypass the series circuit composed of the expansion valve (11). Further, the three-way switching valve 13 is connected to the first expansion valve 8 side of the first solenoid valve 7.
The water heat exchanger 12 of each refrigerating device 2 is provided with a common ice heat storage tank 2.
0, and a medium such as oil is circulated by driving the pump 15 to exchange heat with water stored in the ice heat storage tank 20.

With such a configuration, during normal refrigeration operation, the first solenoid valve 7 is opened, and the second solenoid valve 10 and the third solenoid valve 10 are opened.
The inside of the refrigeration showcase 3 is cooled by closing the solenoid valve 14 and operating each compressor 5 to form a normal refrigeration cycle. In the heat storage operation, the second electromagnetic valve 10 is opened, the first electromagnetic valve 7 and the third electromagnetic valve 14 are closed, and the compressor 5 is operated to store cold heat in the ice heat storage tank 20. Furthermore, during the heat storage operation, the third
The solenoid valve 14 is opened, and the first solenoid valve 7 and the second solenoid valve 10
Is closed, the three-way switching valve 13 is switched and controlled, the compressor 5 is operated, and the condenser fan 9 is stopped. As a result, the refrigerant from the compressor 5 is not condensed in the condenser 6 but condensed in the water heat exchanger 12, and then passes through the three-way switching valve 13, where the first expansion valve 8, the evaporator 4, and the compressor A cycle of circulating 5 is formed. That is, during the heat storage take-out operation, the power consumption is reduced by stopping the driving of the condenser fan 9.

[0005]

However, the heat storage extraction operation of the heat storage type refrigeration system 1 is performed by the ice heat storage tank 20.
Of the water may decrease with time, and the water heat exchanger 12 may not be sufficiently condensed. In this case, it is necessary to constantly monitor the cooling capacity of the ice heat storage tank 20 and perform control to switch to a normal refrigeration cycle when the cooling capacity is reduced. Was.

Further, during the heat storage operation in which the heat is stored in the ice heat storage tank 20, the inside of the freezing showcase 3 cannot be cooled. For this reason, in order to cool the inside of the showcase, switching control of the solenoid valve must be performed, and this control is complicated. The first solenoid valve 7
A combined operation in which the normal operation and the cold storage operation are simultaneously performed by opening the second electromagnetic valve 10 and closing the third electromagnetic valve 14 is also disclosed. In this case, the refrigeration load in the refrigeration showcase 3 is disclosed. In order to cool both the evaporator 4 and the water heat exchanger 12 irrespective of whether the load is high or low, one of the showcases may be insufficiently cooled (at high load) or may be cooled. In some cases, the power consumption becomes excessive (at a low load) and wasteful power consumption is performed.

Further, an installation place for the ice heat storage tank 20 is required, and it has been difficult to reduce the size.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a regenerative refrigeration system capable of efficiently and economically reducing power consumption and changing at the time of power peak. Is to do.

[0009]

In order to achieve the above object, according to the first aspect of the present invention, a heat storage material is provided, and refrigerant is sequentially supplied to a compressor, a condenser, a first expansion device, a cooler, and the compressor. A normal refrigeration cycle to circulate, and the compressor,
A heat storage refrigeration apparatus that includes a condenser, a second expansion device, a heat storage material heat exchanger, and a heat storage refrigeration cycle that sequentially circulates through the compressor to change the load applied to the compressor. It has a supercooling refrigeration cycle in which the condensed refrigerant is supercooled by flowing into the heat storage material exchanger, and the supercooled refrigerant is sequentially circulated through the first expansion device, the cooler, the compressor, and the condenser. I suggest something.

According to the present invention, when cold heat is stored in the heat storage material, the refrigerant condensed in the condenser is supercooled by the heat exchanger for heat storage material. The refrigeration capacity is improved as compared with. Therefore, when operating in a supercooled refrigeration cycle,
Since the load on the compressor can be reduced, the power for driving the compressor can be reduced.

According to a second aspect of the present invention, in the thermal storage refrigeration system of the first aspect, in the thermal storage refrigeration cycle, a suction pressure adjusting valve is connected in series between the heat exchanger for thermal storage material and the compressor. And the suction pressure regulating valve is opened when the refrigerant pressure on the compressor side falls below a predetermined set pressure.

According to the present invention, when the suction side pressure of the compressor in the normal refrigeration cycle becomes equal to or less than the set pressure due to reduction of the refrigeration load, the suction pressure regulating valve is opened.
Thereby, a heat storage refrigeration cycle is formed in parallel with the normal refrigeration cycle. When the suction side pressure of the compressor in the normal refrigeration cycle becomes larger than the set pressure due to an increase in the refrigeration load or the like, the suction pressure regulating valve closes. Thereby, the heat storage refrigeration cycle is shut off, and only the normal refrigeration cycle is formed. Therefore, it is possible to efficiently store the cold heat in the heat storage material while maintaining the cooling of the cooler by the normal refrigeration cycle according to the increase or decrease of the refrigeration load.

According to a third aspect of the present invention, in the regenerative refrigerating apparatus according to the first aspect, a cooler including the heat storage material, a first expansion device, a cooler, a second expansion device, and a heat exchanger for the heat storage material. A unit is proposed in which the unit is connected to a compressor unit having the compressor and the condenser.

Further, the invention of claim 4 proposes a regenerative refrigerating apparatus according to claim 3, wherein a plurality of the cooler units are connected to a common compressor unit.

According to the third and fourth aspects of the present invention, since the heat storage material is built in the cooler unit, the space can be efficiently used, and when the cooler unit is installed, piping work around the heat storage material is performed. The workability is improved without the need. In addition, since the compressor unit having the compressor and the condenser is also used for a normal non-heat storage type refrigerator such as the present invention, it is possible to share a compressor unit with a normal non-heat storage type refrigeration apparatus. it can. Thereby, cost reduction and improvement of workability can be achieved.

Further, according to a fifth aspect of the present invention, in the regenerative refrigerating apparatus according to the fourth aspect, a heat storage material heat exchanger of each of the plurality of cooler units and a compressor of the compressor unit are provided. It is proposed that a common suction pressure adjusting valve is connected in series, and the suction pressure adjusting valve is opened when the refrigerant pressure on the compressor side becomes equal to or lower than a predetermined set pressure.

According to the present invention, since the heat exchanger for heat storage material in each cooler unit is connected to the common suction pressure regulating valve, the heat storage refrigeration cycle is performed when the refrigeration load on each cooler unit is reduced. It is formed. Thereby, it becomes possible to efficiently store the cold heat in the heat storage material according to the increase or decrease of the refrigeration load in the total cooler unit.

According to a sixth aspect of the present invention, in the regenerative refrigeration system of the second aspect, the heat storage material, the first expansion device, the cooler, the second expansion device, the heat storage material heat exchanger, and the suction pressure adjustment. The present invention proposes a configuration in which a cooler unit having a valve is connected to a compressor unit having the compressor and the condenser.

According to the present invention, since the heat storage material is incorporated in the cooler unit, the space can be efficiently used, and when the cooler unit is installed, piping work around the heat storage material is not required, and workability is improved. I do. In addition, since the compressor unit having the compressor and the condenser is also used for a normal non-heat storage type refrigerator such as the present invention, it is possible to share a compressor unit with a normal non-heat storage type refrigeration apparatus. it can. Thereby, cost reduction and improvement of workability can be achieved.

Furthermore, the invention of claim 7 proposes the regenerative refrigerating apparatus of claim 6, wherein a plurality of the cooler units are connected to a common compressor unit.

According to the present invention, since the heat exchanger for heat storage material in each cooler unit is connected to the common suction pressure regulating valve, the heat storage refrigeration cycle is performed when the refrigeration load on each cooler unit is reduced. It is formed. Thereby, it becomes possible to efficiently store the cold heat in the heat storage material according to the increase or decrease of the refrigeration load in the total cooler unit.

[0022]

(First Embodiment) A regenerative refrigeration apparatus according to one embodiment of the present invention will be described with reference to FIG. FIG. 1 is a refrigerant circuit diagram illustrating a refrigeration cycle of a regenerative refrigeration apparatus. In the present embodiment, a regenerative refrigeration system used in a store such as a supermarket will be described.

The regenerative refrigeration system 100 includes a plurality (for example, two) of chiller units 200 and 300, which are refrigeration showcases installed in a store, and a compressor installed outdoors or in a backyard of the store. It is provided with a unit 400 and a suction pressure adjusting valve 500. Since the cooler units 200 and 300 have the same configuration, only the former will be described here.

The cooler unit 200 is provided between the output side and the input side pipe of the compressor unit 400 and the first solenoid valve 20.
1, a first expansion valve 202 as a throttle device and an evaporator 203 as a cooler are connected in series. In parallel with this, a circuit in which the second solenoid valve 204, the second expansion valve 205, the heat storage material heat exchanger 206, and the third solenoid valve 207 are sequentially connected in series is compressed via the suction pressure regulating valve 500. It is connected to the input side pipe of the machine unit 400. Further, a series circuit including the second solenoid valve 204 and the second expansion valve 205 is short-circuited by a fourth solenoid valve 208. Further, from between the heat storage material heat exchanger 206 and the third solenoid valve 207,
A series circuit including the fifth solenoid valve 209 and the check valve 210 includes:
It is connected between the first solenoid valve 201 and the first expansion valve 202. The check valve 210 is connected to the heat storage material heat exchanger 20.
The refrigerant is connected to flow from the sixth side to the first expansion valve 202 side. A heat storage material 211 is provided near the heat storage material heat exchanger 206, and the heat storage material heat exchanger 206
Heat exchange is possible. As the heat storage material 211, water is suitable because it is inexpensive and easy to handle.
Antifreeze (brine) or the like may be used. The opening and closing of the first solenoid valve 201 is controlled by a temperature detecting means (not shown) such as a thermostat installed in the showcase. Control for closing the first solenoid valve 201 is performed in order to prevent this. The first solenoid valve 201 is controlled to open and close as described later separately from the temperature detecting means.

The compressor unit 400 has a compressor 401, a condenser 402, and a liquid receiver 403 connected in series in this order. We are trying to cool. Compressor 40
A pressure switch (not shown) is attached to the suction-side pipe 1 and when the suction-side pressure of the compressor 401 falls below a predetermined set pressure, the cooler units 200 and 30
0, the compressor 401 determines that the refrigeration load has been reduced.
To stop driving. Further, the condenser fan 404 is driven and stopped in conjunction with the compressor 401.

With such a configuration, the regenerative refrigeration system 1
00 can perform a refrigeration operation in the following three operation modes. The three operation modes are a normal operation mode, a cool storage operation mode mainly operated at night when the power demand is small and the power cost is small, and a supercooled operation mode mainly operated during the daytime when the power demand peaks. Hereinafter, the operation in each operation mode will be described.

First, the normal operation mode will be described.
In this normal operation mode, the first solenoid valves 201 and 301 are controlled to open and close based on the thermostat, the second solenoid valves 204 and 304, the fourth solenoid valves 208 and 308, and the fifth solenoid valves 209 and 309 are closed. 3 solenoid valves 207, 307
Shall be open. As a result, the refrigerant flows into the first solenoid valves 201, 3
01, first expansion valves 202 and 302, evaporators 203 and 30
3. A normal refrigeration cycle is formed in which the compressor 401, the condenser 402, and the liquid receiver 403 are sequentially circulated (see the solid arrow in FIG. 1). In this normal operation mode, the compressor 40
By driving the condenser fan 1 and the condenser fan 404, the evaporators 203 and 303 are cooled by the circulation of the refrigerant, and the inside of each showcase is cooled. At this time, the first solenoid valve 201 is controlled so that the temperature in each showcase is maintained at a predetermined temperature.
And 301 are controlled to open and close by the temperature detecting means. Further, when both the first solenoid valves 201 and 301 are closed, the suction side pressure of the compressor 401 decreases, so that the compressor 401 and the condenser fan 404 are controlled by the pressure switch (not shown). Stop driving. As described above, each of the cooler units 200 and 300 can keep the inside of each showcase cooled to a predetermined temperature. Note that the third solenoid valves 207 and 307 may be closed.

Next, the cold storage operation mode will be described.
In this cold storage operation mode, the first solenoid valves 201 and 301 are controlled to open and close based on the thermostat, and the second solenoid valves 204 and 304 and the third solenoid valves 207 and 307 are opened.
Fourth solenoid valves 208 and 308, fifth solenoid valves 209 and 309
Is closed. Thus, the normal refrigeration cycle is formed, and the second solenoid valves 204 and 304, the second expansion valves 205 and 305, the heat storage material heat exchangers 206 and 306, the third solenoid valves 207 and 307, and the suction pressure adjusting valve are provided. A heat storage refrigeration cycle of 500, a compressor 401, a condenser 402, and a liquid receiver 403 is formed (see a white arrow in FIG. 1). Here, the set pressure of the suction pressure adjusting valve 500 is set slightly lower than the suction side pressure of the compressor 401 when both the first solenoid valves 201 and 301 are opened in the normal operation mode. In this cold storage operation mode, the refrigerating load of each of the cooler units 200 and 300 is high, and both first solenoid valves 2
01 and 301 open, the suction pressure regulating valve 5
00 is closed and the refrigerant does not flow through the heat storage material heat exchangers 206 and 306, and therefore, the cold storage of the heat storage materials 211 and 311 is not performed. Cooler unit 200 or 30
0, the first solenoid valve 201 or 301 is closed and the suction pressure regulating valve 50 is closed.
0, the pressure on the compressor 401 side decreases. Then, the suction pressure regulating valve 500 is opened, so that the heat storage material heat exchanger 206,
Refrigerant flows into 306, and cold heat is stored in heat storage materials 211 and 311. That is, the power consumption reduced by reducing the load on one or both of the cooler units 200 or 300 is used to store cold heat in the heat storage materials 211 and 311. Thereby, it is possible to efficiently and efficiently maintain the cooling capacity of the cooler units 200 and 300, and to cool the heat storage materials 211 and 311.

Next, the subcooling operation mode will be described. This supercooling operation mode is performed by the first solenoid valves 201 and 30.
Reference numeral 1 denotes a state where the thermostat is not opened and closed and is always closed, and the second solenoid valves 204 and 304 and the third solenoid valves 207 and 3
07 is closed, and the fourth solenoid valves 208 and 308 and the fifth solenoid valves 209 and 309 are controlled to open and close by a thermostat (not shown) as the temperature detecting means. As a result, the refrigerant flows into the fourth solenoid valves 208 and 308 and the heat storage material heat exchanger 20.
6,306, fifth solenoid valves 209, 309, check valve 21
0, 310, first expansion valves 202, 302, evaporator 20
3, 303, compressor 401, condenser 402, liquid receiver 40
3 is formed (see the dotted arrow in FIG. 1). Therefore, the refrigerant condensed in the condenser 402 is supercooled in the heat storage material heat exchangers 206 and 306 and flows into the evaporators 203 and 303. Thereby, as shown in the Mollier diagram of FIG. 2, the refrigeration capacity of the refrigeration cycle is improved. In FIG. 2, a dotted arrow indicates a normal refrigeration cycle, and a solid arrow indicates a supercooled refrigeration cycle. This means that the compression work of the compressor 401 does not change but the refrigerating capacity increases, so that in this supercooling operation mode, the fourth solenoid valve 20 is not used.
The time during which the 8, 308 or the fifth solenoid valves 209, 309 are closed increases, so that the drive stop time (drive stop frequency) of the compressor 401 increases, thereby reducing power consumption.

As described above, in the regenerative refrigerating apparatus 100 according to the present embodiment, in the supercooling operation mode, the refrigerant is supercooled by the heat storage material heat exchanger, so that the refrigerating capacity is improved. Since the load on the compressor is reduced by the improvement of the refrigerating capacity, the operation with reduced power consumption can be performed. In the cold storage operation mode for accumulating cold heat in the heat storage material, the heat storage refrigeration cycle is formed in parallel with the normal refrigeration cycle when the load on the compressor in the normal refrigeration cycle is reduced. It is possible to efficiently cool the heat storage material while maintaining the refrigeration operation in the unit. Further, since the heat storage material is arranged in the cooler unit, the space can be effectively used, and when the cooler unit is installed, piping work around the heat storage material is not required, thereby improving workability. In addition, since the compressor unit having the compressor and the condenser is also used for a normal non-heat storage type refrigerator such as the present invention, it is possible to share a compressor unit with a normal non-heat storage type refrigeration apparatus. it can. Thereby, cost reduction and improvement of workability can be achieved. Other functions and effects are the same as those of the first embodiment.

(Second Embodiment) A regenerative refrigeration apparatus according to a second embodiment of the present invention will be described with reference to FIG. FIG. 3 is a refrigerant circuit diagram illustrating a refrigeration cycle of the regenerative refrigeration apparatus. In the drawings, the same members corresponding to FIG. 1 are denoted by the same reference numerals.

This heat storage type refrigerating apparatus 100 is different from that of the first embodiment in that suction pressure regulating valves 220 and 320 are arranged in each of the cooler units 200 and 300 as shown in FIG. It is in. Here, the set pressures of the suction pressure adjusting valves 220 and 320 may be the same as those of the suction pressure adjusting valve 500 according to the first embodiment.

With this configuration, the number of pipes for connecting the compressor unit 400 and the respective cooler units 200 and 300 can be reduced, so that the workability is improved. Further, each suction pressure adjusting valve 220 and 320
If the set pressures are different, the cooler unit 200 or 300 that starts the heat storage operation to the heat storage material preferentially
Can be set. That is, the heat storage operation of the cooler unit having the suction pressure adjusting valve having the higher set pressure is performed with priority over the other cooler units.

In the first and second embodiments, the compressor is driven and stopped in accordance with the refrigeration load based on the pressure switch. It may correspond to a refrigeration load. Further, the number of cooler units is not limited to two, and may be another number.

[0035]

As described in detail above, according to the present invention,
When cold heat is stored in the heat storage material, the refrigerant condensed in the condenser is supercooled by the heat storage material heat exchanger,
The supercooling refrigeration cycle has an improved refrigeration capacity as compared with the normal refrigeration cycle. Therefore, during operation in the supercooling refrigeration cycle, the load on the compressor can be reduced, and the power for driving the compressor can be reduced.

When the suction side pressure of the compressor in the normal refrigeration cycle becomes equal to or lower than the set pressure due to reduction of the refrigeration load, the suction pressure regulating valve is opened. Thereby, a heat storage refrigeration cycle is formed in parallel with the normal refrigeration cycle. When the suction side pressure of the compressor in the normal refrigeration cycle becomes larger than the set pressure due to an increase in the refrigeration load or the like, the suction pressure regulating valve closes. Thereby, the heat storage refrigeration cycle is shut off, and only the normal refrigeration cycle is formed. Therefore, it is possible to efficiently store the cold heat in the heat storage material while maintaining the cooling of the cooler by the normal refrigeration cycle according to the increase or decrease of the refrigeration load. In particular, when a plurality of cooler units are provided, it is possible to efficiently store cold heat in the heat storage material according to the increase or decrease of the refrigeration load in all the cooler units.

Therefore, power consumption is reduced by forming a supercooled refrigeration cycle during the daytime in summer when power demand is concentrated, and a heat storage refrigeration cycle is formed during the night when electricity rates are low to store heat in the heat storage material. Can be planned. In addition, since the cooling of the cooler in the cooler unit can be maintained during the heat storage, it is particularly suitable for a store or the like that operates for 24 hours.

Further, since the heat storage material is incorporated in the cooler unit, the space can be efficiently used, and when installing the cooler unit, piping work around the heat storage material is not required, so that workability is improved. In addition, since the compressor unit having the compressor and the condenser is also used for a normal non-heat storage type refrigerator such as the present invention, it is possible to share a compressor unit with a normal non-heat storage type refrigeration apparatus. it can. Thereby, cost reduction and improvement of workability can be achieved.

[Brief description of the drawings]

FIG. 1 is a refrigerant circuit diagram illustrating a refrigeration cycle of a regenerative refrigerating apparatus according to a first embodiment.

FIG. 2 is a Mollier diagram of a supercooled refrigeration cycle

FIG. 3 is a refrigerant circuit diagram illustrating a refrigeration cycle of a regenerative refrigeration apparatus according to a second embodiment.

FIG. 4 is a refrigerant circuit diagram illustrating a refrigeration cycle of a conventional regenerative refrigerator.

[Explanation of symbols]

 100: regenerative refrigerator, 200, 300: cooler unit, 201, 301: first solenoid valve 202, 302 ... expansion valve 203, 303 ... evaporator 204, 304 ... second solenoid valve 205, 305: second expansion Valves 206, 306: Heat exchangers for heat storage materials 207, 307: Third solenoid valves 208, 308: Fourth solenoid valves 209, 309: Fifth solenoid valves 210, 310: Check valves 211, 311: Heat storage materials 220, Reference numeral 320: suction pressure adjusting valve 400: compressor unit 401: compressor 402: condenser 403: receiver 404: condenser fan 500: suction pressure adjusting valve

Claims (7)

[Claims] 1. A storage device comprising a heat storage material, wherein a refrigerant, a compressor, a condenser,
A first refrigeration cycle for sequentially circulating the first expansion device, the cooler and the compressor, and the refrigerant, the compressor, the condenser,
In a heat storage refrigeration apparatus having a second expansion device, a heat storage material heat exchanger, and a heat storage refrigeration cycle for sequentially circulating the compressor, the load on the compressor is changed. It has a subcooling refrigeration cycle in which it flows into the heat exchanger for heat storage material and is supercooled, and the supercooled refrigerant is sequentially circulated through the first expansion device, the cooler, the compressor and the condenser. Thermal storage refrigeration equipment. 2. In the heat storage refrigeration cycle, a suction pressure adjusting valve is connected in series between the heat exchanger for heat storage material and the compressor, and the suction pressure adjusting valve has a predetermined refrigerant pressure on the compressor side. 2. The regenerative refrigerating apparatus according to claim 1, wherein the refrigerating apparatus is opened when the pressure becomes equal to or lower than the set pressure. 3. A cooling unit having the heat storage material, a first expansion device, a cooler, a second expansion device and a heat storage material heat exchanger, and a compressor unit having the compressor and the condenser. The regenerative refrigerating apparatus according to claim 1, wherein the refrigerating apparatus is configured as follows. 4. The regenerative refrigeration system according to claim 3, wherein a plurality of said cooler units are connected to a common compressor unit. 5. A common suction pressure adjusting valve is connected in series between each heat storage material heat exchanger of the plurality of cooler units and a compressor of the compressor unit, and the suction pressure adjusting valve is 5. The regenerative refrigerating apparatus according to claim 4, wherein the refrigerating apparatus is opened when the refrigerant pressure on the compressor side becomes equal to or lower than a predetermined set pressure. 6. A cooling unit having the heat storage material, a first expansion device, a cooler, a second expansion device, a heat storage material heat exchanger and a suction pressure adjusting valve, and a compressor having the compressor and the condenser. 3. The regenerative refrigerating apparatus according to claim 2, wherein the refrigerating apparatus is connected to a unit. 7. The regenerative refrigeration system according to claim 6, wherein a plurality of said cooler units are connected to a common compressor unit.