JPH06174354A - Heat accumulative type refrigerator - Google Patents

Abstract

PURPOSE:To provide a heat accumulative type refrigerator in which heat accumulative material having a high melting temperature can be used, a dew formation at a cabinet during a cold heat accumulative cooling operation can be prevented and an increasing of thermal load in a cabinet during the heat accumulative operation can be prevented and further it has a superior efficiency. CONSTITUTION:A heat accumulative type refrigerator is constructed such that it has a heat accumulative device 53 having a melting temperature which is approximately the same temperature as that of a freezing chamber, the heat accumulative device 53 is freezed with an operating surplus force of a compressor 57 at a midnight time range and there is provided means for cooling a freezing chamber 35 with the compressor 57 and for cooling a load of the refrigerator chamber with a cold heat source for the heat accumulative device 53 only for a predetermined period of time at a daytime. During the operation at midnight for keeping cold heat accumulation, means is provided for changing- over it to a heat accumulative cooling circuit where no refrigerant is flowed to a drying pipe.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a heat storage type refrigerator / freezer which cools the inside of a refrigerator by using a heat storage material.

[0002]

2. Description of the Related Art In recent years, from the viewpoints of effective use of late-night power or leveling by cutting the peak of power demand, the heat storage material is frozen at midnight power and the latent heat of fusion of the heat storage material frozen during the daytime is used. Studies have been conducted on a heat storage type refrigerator / freezer that cools the inside of a refrigerator by, for example, Japanese Patent Laid-Open No. 63-5806.
A heat storage type freezer-refrigerator such as that known from Japanese Patent No. 8 is considered.

An example of the conventional heat storage type refrigerator-freezer described above will be described below with reference to the drawings.

FIG. 3 is a longitudinal sectional view showing the structure of a conventional heat storage type refrigerator / freezer, and FIG. 4 is a refrigeration system diagram. In FIG. 3 and FIG. 4, reference numeral 1 is a refrigerator main body and is composed of a cabinet 2 having a heat insulating material built therein, and a door 3, a gasket 14 for sealing the door 3 and the cabinet 2. The interior is divided into two chambers, an upper freezing chamber 17 and a lower refrigerating chamber 18, by a horizontally arranged intermediate partition wall 16.

Reference numeral 4 is a compressor, which is a condenser 5a.
And the cabinet 2 is connected to the three-way solenoid valve 6 via each capacitor of the dry pipe 5b for preventing dew condensation. Further, the first outlet 6a of the three-way solenoid valve 6 is connected to the compressor 4 via the capillary 7, the cooler 8 and the accumulator 13 in this order.

The second outlet 6b of the three-way solenoid valve 6
Are sequentially connected to the accumulator 13 via a heat storage capillary 9 and a heat storage device 10 having a heat storage material 15 filled therein.

Further, a closed loop type thermosiphon 12 is provided as a heat transfer path between the cooler 8 and the heat storage unit 10, and a heat storage solenoid valve 11 is arranged in the middle of the closed loop type thermosiphon 12. The closed-loop thermosiphon 12 is, for example, a gravity type, and a refrigerant is enclosed in the closed-loop pipe.

Numeral 19 is a cooling fan for cooling the inside of the refrigerator, and is arranged so that cold air can be discharged from the freezer compartment upper outlet 20 and the freezer compartment lower outlet 21 provided in front of the cooler 8. There is. The intermediate partition wall 16
A freezing compartment suction port 22 is provided on the front side of the freezing compartment, and a freezing compartment intermediate duct 23 extending from here to the cooler 8 is horizontally formed.

Further, a refrigerating compartment duct 25 extending vertically from the cooling fan 19 to the refrigerating compartment outlet 24 is vertically provided at the back of the cooler 8 along the back surface of the refrigerator. This refrigerating room outlet 2
4 can be opened and closed by a damper 26. A refrigerating compartment suction port 27 is provided on the front side of the intermediate partition wall 16 on the refrigerating compartment side, and a refrigerating compartment middle duct 28 extending from this to the cooler 8 is horizontally formed.

A glass tube heater 29 is arranged at the outlet of the refrigerating compartment intermediate duct 28 to enable defrosting of the cooler 8 arranged above it.

The operation of the heat storage type refrigerator-freezer constructed as above will be described below.

In the normal cooling operation, the coil of the three-way solenoid valve 6 is not energized and is switched to the first outlet 6a side, and the compressor 4 is connected to the condenser 5a, the dry pipe 5b, the three-way solenoid valve 6, and the capillary tube 7. A cooling medium flow path is sequentially formed to reach the cooler 8, and a cooling medium flow path from the cooler 8 to the compressor 4 via the accumulator 13 is formed, and the cool air of the cooler 8 is supplied to the freezing chamber 17 and the refrigerating chamber 18 by the cooling fan 19. Blow and cool each room.

On the other hand, the heat storage operation is switched to the second outflow side by energizing the coil of the three-way solenoid valve 6, and the compressor 4 to the condenser 5a and the dry pipes 5b and 3 are switched.
The solenoid valve 6 and the regenerator capillary 9 are sequentially passed to reach the regenerator, and from this regenerator 10 to the accumulator 13
A refrigerant flow path is formed to reach the compressor 4 via the heat storage material 10 to freeze the heat storage material 15 in the heat storage device 10.

In the heat storage cooling operation, the heat storage solenoid valve 1 is used.
When 1 is opened, the closed loop thermosiphon 12 cools the heat storage device 10 to the cooler 8, and the heat is used to cool the freezer compartment 17 and the refrigerating compartment 18.

Then, each of the above operation modes is controlled by a timer (not shown) as follows. During the midnight hours when the power demand is low (from 23:00 to 7:00 on the next day in this embodiment), the heat storage operation and the normal cooling operation are alternately performed by the timer to keep the internal temperature of the refrigerator at the set temperature while the heat storage material 15 is kept. to freeze.

Then, the compressor 4 is stopped by the timer for the heat storage cooling operation for 3 hours during the peak daytime power demand period (13:00 to 16:00 in this embodiment), and the latent heat of fusion of the heat storage material 15 is carried out. The inside of the refrigerator is cooled by and the electric power consumption of the refrigerator is greatly reduced.

For defrosting the cooler 8, the operating time of the compressor 4 is integrated, and when the integrated time reaches an arbitrary time, the compressor 4 is stopped, the heat storage solenoid valve 11 is closed, and the glass tube heater 29 is energized. Then defrost. The defrosting frequency is set to an arbitrary time such that it is about twice a day in the summer.

[0018]

However, in the above-mentioned conventional structure, in order to cool the freezer compartment 17 and the refrigerating compartment by the latent heat of fusion of the heat storage material 15, the low temperature heat storage material 15 having a melting temperature of -30 ° C. or less is used. Is required, the compressor 4 needs to be upsized in order to freeze the heat storage material at −30 ° C. or lower at midnight, and the latent heat of fusion of the low temperature heat storage material 15 is small, so the heat storage device 10 is very large, the cooling load of the refrigerator is increased, and the power consumption of the refrigerator is increased.

Further, since the compressor 4 is stopped during the heat storage cooling operation, the high temperature refrigerant does not flow into the dry pipe 5b during the heat storage cooling operation, so that the function of preventing dew condensation of the cabinet 2 is deteriorated and dew condensation occurs on a part of the cabinet 2. It had a problem that occurs.

Further, during the midnight time, the operation rate of the compressor 4 becomes extremely high because the heat storage material 15 is frozen, and the time during which the high-temperature refrigerant flows through the dry pipe 5b becomes too long, so that the condensation preventing function of the cabinet 2 becomes excessive. However, there is a problem in that the heat load in the refrigerator increases and the electric power increases.

The present invention solves the above-mentioned conventional problems, and has a regenerator capable of maximizing the remaining cooling capacity of the compressor in the midnight hours without increasing the size of the compressor, and a cabinet in a regenerative cooling operation. It is an object of the present invention to provide a heat storage refrigerator capable of preventing dew condensation of No. 2 and preventing an increase in the heat load of the cabinet 2 during the heat storage operation in the midnight time zone.

[0022]

In order to achieve this object, the heat storage type refrigerator of the present invention is usually partitioned by a cooler for cooling the refrigerator and a heat insulating wall having a suction port and a discharge port in the refrigerating chamber. , A regenerator with a melting temperature equal to or higher than the temperature of the freezer and a latent heat of fusion equivalent to the remaining operating capacity of the compressor in the midnight hours, and a regenerator that is operated only for a certain period of daytime. With a blower fan
The heat storage material is frozen only when the freezing room in the midnight time is lower than the predetermined temperature, and the intake air of the refrigerating room and the cooler is cooled only by the cool air cooled by the heat storage device for the predetermined time in the daytime time. Be prepared.

Further, a normal refrigeration cycle in which a compressor, a condenser, a dry pipe, a capillary tube and a cooler are sequentially connected, and a capillary tube for a regenerator and a regenerator in parallel with a series circuit of the dry pipe, the capillary tube and the cooler. With a heat storage refrigeration cycle consisting of a series circuit of, with a configuration to switch to a heat storage refrigeration cycle in which the high temperature refrigerant does not flow to the dry pipe only when the temperature of the freezing room in the midnight time is lower than a predetermined temperature. is there.

[0024]

According to the present invention, with the above-described structure, the heat storage cooling operation and the refrigeration cycle in which the high temperature refrigerant is supplied to the dry pipe can be performed simultaneously, and the dew condensation of the cabinet during the heat storage cooling operation can be prevented.

Further, the large latent heat of fusion is -15 ° C to -20.
Since it is possible to use a heat storage material with a melting temperature of about ℃, it is possible to set the operating evaporation temperature of the compressor during heat storage operation to a high value, increase the amount of heat stored during the midnight hours, and increase the size of the existing compressor. It is possible to reduce power consumption during the daytime.

Further, since it is possible to prevent an increase in heat load from the dry pipe into the refrigerator during the heat storage operation in the midnight time,
Energy saving can be achieved.

[0027]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is a vertical sectional view showing the structure of a heat storage type refrigerator according to an embodiment of the present invention, and FIG. 2 is a refrigeration cycle diagram. In FIGS. 1 and 2, reference numeral 30 denotes a refrigerator main body, which includes a cabinet 31 in which a heat insulating material is incorporated, and a door 32, a door 32, and a gasket 33 that seals the cabinet 31.

The interior of the refrigerator body 30 has an intermediate partition wall 3
2 of the upper freezing chamber 35 and the lower refrigerating chamber 36.
The room is partitioned.

Reference numeral 37 is a cooling fan for cooling the inside of the refrigerator, and 38 is a cooler for cooling the refrigerator. The freezer compartment upper outlet 39 and the freezer compartment lower outlet provided in front of the cooler 38. The cold air can be sent from 40.

A freezer compartment suction port 41 is provided in front of the intermediate partition wall 34 on the freezer compartment side, and a freezer compartment intermediate duct 42 extending from here to the cooler 38 is formed.

A refrigerating compartment duct 44 extending vertically from the cooling fan 37 to the refrigerating compartment outlet 43 is provided vertically along the back of the refrigerator at the back of the cooler 38. The refrigerator outlet 43 can be opened and closed by a damper 45.

A refrigerating compartment suction port 46 is provided in front of the intermediate partition wall 34 on the refrigerating compartment side, and a refrigerating compartment intermediate duct 47 extending from this to the cooler 38 is horizontally formed.

A glass tube heater 48 is arranged at the outlet of the refrigerating compartment intermediate duct 47 to enable defrosting of the cooler 38 arranged above it.

Further, on the side of the refrigerating chamber of the intermediate partition wall 34, a suction port 49, a first discharge port 50 and a second discharge port 5 are provided.
1 is arranged, and a heat storage device 53 and a blower fan 54 are arranged in the heat insulating compartment 52. The suction port 49 communicates with the refrigerating compartment intermediate duct portion 47a near the refrigerating compartment suction port 46, the first outlet 50 communicates with the outlet neighboring portion 47b of the refrigerating compartment intermediate duct portion 47, and the second discharge outlet 51 extends. It communicates with the inside of the refrigerating compartment 36 near the refrigerating compartment outlet 43.

Inside the regenerator 53, there is a melting temperature equal to or higher than the temperature of the freezer compartment 35 (-16 ° C. in this embodiment),
The latent heat storage material 55 having a latent heat of fusion equivalent to the remaining operating capacity of the compressor in the midnight time zone (from 23:00 to 7:00 on the next day) is filled. Reference numeral 56 denotes a refrigerant pipe that is arranged in heat exchange with the heat storage material 55, and flows a refrigerant to freeze the heat storage material 55 when the freezing chamber 35 during the night time is lower than a predetermined temperature.

As shown in FIG. 2, the refrigeration system has a compressor 57, a condenser 58, and a dry pipe 59 for preventing perspiration from the cabinet portion near the gasket 33.
The capillary tube 60 and the cooler 38 are sequentially connected to form a normal refrigeration cycle.

A three-way valve 62 is provided at the outlet of the condenser 58.
The dry pipe 59 and the capillary tube 60.
A heat storage refrigerant circuit including a heat storage capillary 63 and a refrigerant pipe 56 of the heat storage device 53 is connected in parallel with the series circuit of the cooler 38.

Reference numeral 63 is a supercooler, which is a capillary 6 for a heat storage device.
Heat is exchanged between the 3 inlet pipe and the outlet pipe of the heat storage refrigerant pipe 56. 64 is an accumulator.

The operation of the heat storage refrigerator constructed as described above will be described below. First, the operation during the normal cooling operation will be described. During normal cooling operation, the three-way valve is switched to the dry pipe 59 side, and the compressor 57 to the condenser 58, the dry pipe 59, and the capillary tube 6 are connected.
0, a refrigeration cycle from the accumulator 64 to the compressor 58 is formed, and the cool air cooled by the cooler 38 is cooled by the cooling fan 37 as shown by the dotted line arrow in FIG.
5 and the refrigerating compartment 36 are cooled by blowing air, and the damper 45 is opened and closed to control the refrigerating compartment 36 to a predetermined temperature, and the compressor 57 and the cooling fan 37 are stopped by a freezing compartment 35 temperature detector (not shown). Then, the freezer compartment 36 is controlled to a predetermined temperature.

Next, the operation during the heat storage operation will be described.
The heat storage operation is performed by switching the three-way valve 62 to the heat storage capillary tube 63 side when the cooling fan 37 is stopped in the middle of the night, that is, when the freezing room 36 has dropped to a predetermined temperature, and the compressor 57 is connected to the heat storage capillary tube 63 and the refrigerant pipe. A heat storage refrigerant circuit is formed from 56 to the accumulator 64 and the compressor 57, and the heat storage material 5 in the heat storage device 53 is formed.
Freeze 5.

When the temperature of the freezer compartment 35 rises above a predetermined temperature, the three-way valve 62 is switched to the dry pipe 59 side, the cooling fan 37 is operated, and the normal cooling operation is performed.

During the midnight time (from 23:00 to 7:00 of the next day in this embodiment), the above operation is repeated to freeze the heat storage material 55 of the heat storage device 53.

At this time, a heat storage material 53 whose melting temperature is equal to or higher than the temperature of the freezer compartment 35 (-16 ° C. in this embodiment) is used, and the filling amount of the heat storage material 53 is during the normal cooling operation in the above-mentioned midnight time zone. The amount of heat storage material that can be frozen by the remaining operating capacity of the compressor 57 is set.

Therefore, since the evaporation temperature can be frozen at the same evaporation temperature as in the normal cooling operation, the evaporation temperature in the heat storage operation can be made higher than in the conventional case, and the heat storage amount in the midnight time zone can be increased.
Efficient freezing operation can be performed without lowering the performance index of the refrigeration cycle.

Further, the refrigerating chamber 36 is provided through the heat insulating partition wall 52.
The amount of cooling heat leaked to the compressor can be reduced, and the refrigerating capacity of the compressor 57 can be utilized to the maximum extent for freezing the heat storage material 53.

Further, since the high temperature refrigerant does not flow into the dry pipe 59 during the heat storage operation, it is possible to prevent an increase in the heat load amount entering the refrigerator main body 30 due to the high temperature refrigerant in the dry pipe 59, and energy saving can be achieved. .

Next, the operation during the daytime heat storage cooling operation will be described. When it enters the daytime zone (7:00 to 23:00 in this embodiment), the heat storage operation is stopped, the normal cooling operation is performed, and the cool air cooled by the cooler 38 is circulated as shown by the dotted line arrow in FIG. The freezer compartment 35 and the refrigerator compartment 36 are cooled to a predetermined temperature.

Then, when the daytime power demand enters a peak time zone (13:00 to 16:00 in this embodiment), the blower fan 5
4 is operated and the cold air cooled by the heat storage device 53 is circulated as shown by the solid line arrow in FIG. 1 to cool the intake air of the refrigerating chamber 36 and the cooler 38.

At this time, the amount of air blown by the blower fan 54 is about twice the amount of air passing through the refrigerating compartment intermediate duct portion 47a during the normal cooling operation (about 0.5 m ³ / min in this embodiment), and the first discharge port The size of 50 is significantly smaller than that of the refrigerating compartment intermediate duct 47, the damper 43 is completely opened, and the cooling fan 37 and the blower fan 54 are in operation while passing through the refrigerating compartment intermediate duct portion 47a during normal cooling operation. The flow rate is about the same (about 0.2 m ³ / min in this embodiment).

At this time, cold air cooled by the cold heat source of the heat accumulator 53 is discharged into the refrigerating chamber 36 through the second outlet 51, and the refrigerating chamber 36 is cooled, so that the temperature in the vicinity of the damper 43 becomes low, so that the damper 43. Is almost closed. Further, when the cooling load of the refrigerating chamber 36 increases, the damper 43 is opened, and the refrigerating chamber 36 is auxiliary cooled by the cool air of the cooler 38.

At this time, the refrigerating chamber 36 is cooled, and the cold air whose temperature has risen is cooled by the heat storage device 53, and then the first discharge port 50.
Further, it is discharged to a portion 47b near the outlet of the refrigerating compartment intermediate duct portion 47 and sucked into the cooler 38 to prevent the temperature of the cool air from rising.

Therefore, during the heat storage cooling operation, the freezer compartment 35 can be cooled by the compressor 57 and the heat load of the refrigerating compartment 36 can be reliably cooled by the heat storage unit 53, so that the cooling load of the cooler 38 is reduced. It can be reduced only to the cooling load, and the daytime power demand is at a peak time (13 to 16 in this embodiment).
The operation rate of the compressor 57 can be reduced. Further, since the cooling operation by the compressor 57 is performed in parallel during the heat storage cooling operation, the high-temperature refrigerant can flow through the dry pipe 59 even during the heat storage cooling operation, and the dew condensation of the cabinet 31 during the heat storage cooling operation can be prevented. You can

As described above, according to this embodiment, the refrigerating cycle in which the compressor 57, the condenser 58, the dry pipe 59, the capillary tube 60 and the cooler 38 are sequentially connected, and the latent heat storage material 55 is filled inside. , Heat storage material 55
Accumulator 5 having a refrigerant pipe 56 arranged in heat exchange with
3, a cooling storage refrigerant circuit for flowing a cooling refrigerant into the refrigerant pipe 56 of the heat storage device 53 to freeze the heat storage material 55 at a predetermined midnight time, and a cooling source for controlling the cold heat source of the heat storage device 53 at a predetermined time during the day to control the refrigerator. And a heat storage device 53 and a blower fan 54 are arranged in an adiabatic compartment 52 having a suction port 49, a first discharge port 50, and a second discharge port 51.
The inside of the heat storage device 53 is filled with a latent heat storage material 55 having a melting temperature equal to or higher than the temperature of the freezer compartment 35 and a latent heat amount of melting equivalent to the remaining operating capacity of the compressor in the midnight time of summer,
When the temperature of the freezer compartment 35 in the midnight time is lower than the predetermined temperature, the heat storage material 55 is frozen, and the blower fan 37 is operated at the predetermined time in the daytime to operate the cold heat source of the heat storage device 53 as the first and second discharge ports. A configuration is provided in which the cool air discharged from the first and second discharge ports 50 and 51 sucks the air sucked into the cooler 38 and the cool air discharged from the second and second discharge ports 51 cools the refrigerating chamber. is there.

As a result, during the heat storage cooling operation, the freezer compartment 35 can be cooled by the compressor 57 and the heat load of the refrigerating compartment 36 can be reliably cooled by the heat store 53, so the cooling load of the cooler 38 is frozen. It can be reduced only to the cooling load of the room 35, and the daytime power demand is at a peak time (in this embodiment, 13
It is possible to reduce the operating rate of the compressor 57 from 16:00 to 16:00.

During the heat storage cooling operation, the compressor 57
Since the cooling operation is performed in parallel, the high-temperature refrigerant can flow through the dry pipe 59 even during the heat storage cooling operation, and the occurrence of dew condensation on the cabinet 31 during the heat storage cooling operation can be prevented.

Further, a heat storage cooling refrigerant circuit consisting of the heat storage capillary tube 63 and the refrigerant tube 56 of the heat storage device 53 is connected in parallel with the series refrigerant circuit of the dry pipe 59, the capillary tube 60 and the cooler 61, and the midnight time. Only when the temperature of the freezing compartment in the strip is lower than a predetermined temperature, a configuration is provided for switching to the heat storage cooling refrigerant circuit in which the refrigerant does not flow through the dry pipe.

As a result, since the high-temperature refrigerant does not flow through the dry pipe 59 during the heat storage operation, it is possible to prevent an increase in the heat load amount that enters the refrigerator body 30 due to the high-temperature refrigerant in the dry pipe 59, thus saving energy. Can be achieved.

[0059]

As described above, the present invention has a refrigerating cycle in which a compressor, a condenser, a dry pipe, a capillary tube and a cooler are sequentially connected, and a latent heat type heat storage material is filled in the refrigeration cycle to exchange heat with the heat storage material. A heat storage device having a refrigerant pipe arranged in, a heat storage cooling refrigerant circuit for freezing a heat storage material by flowing a cooling refrigerant into the refrigerant pipe of the heat storage device in a predetermined midnight time period,
Equipped with a blower fan that controls the cold heat source of the regenerator to cool the refrigerator at a predetermined time in the daytime, the regenerator and the blower fan are placed in an adiabatic compartment that has a suction port and a discharge port, and a freezer inside the regenerator. When a latent heat storage material with a melting temperature equal to or higher than the temperature and a latent heat of fusion equivalent to the remaining operating capacity of the compressor in the midnight time of summer is filled, and the temperature of the freezer in the midnight time is lower than the specified temperature. The heat storage material is frozen, and the air in the refrigerating room is sucked in only during the daytime hours, and the cool air cooled by the cold heat source of the regenerator is discharged from the discharge port by the blower fan. It is provided with a structure for cooling air.

As a result, during the heat storage cooling operation, the freezer can be cooled by the compressor and the heat load of the refrigerating room can be surely cooled by the heat store. Therefore, the cooling load of the cooler is only the cooling load of the freezer. The operating rate of the compressor can be reduced during the peak daytime power demand. In addition, since the cooling operation by the compressor is performed in parallel during the heat storage cooling operation, the high temperature refrigerant can be flown through the dry pipe even during the heat storage cooling operation, and it is possible to prevent dew condensation of the cabinet during the heat storage cooling operation.

Further, a heat storage cooling refrigerant circuit composed of a heat storage capillary tube and a refrigerant tube of the heat storage device is connected in parallel with the series refrigerant circuit of the dry pipe, the capillary tube, and the cooler, and the temperature of the freezing room during the midnight time When the temperature is lower than a predetermined temperature, the heat storage cooling refrigerant circuit that does not flow the refrigerant to the dry pipe is switched to.

As a result, since the high temperature refrigerant does not flow through the dry pipe during the heat storage operation, it is possible to prevent an increase in the amount of heat load entering the refrigerator body due to the high temperature refrigerant in the dry pipe.

[Brief description of drawings]

FIG. 1 is a vertical cross-sectional view showing the structure of a heat storage type refrigerator / freezer according to an embodiment of the present invention.

FIG. 2 is a refrigeration cycle diagram of the heat storage type refrigerator / freezer of the embodiment.

FIG. 3 is a vertical sectional view showing the structure of a conventional heat storage type refrigerator / freezer.

FIG. 4 is a refrigeration cycle diagram of a conventional heat storage type refrigerator / freezer.

[Explanation of symbols]

 35 Freezing Room 36 Refrigerating Room 38 Cooler 53 Heat Storage 54 Blower Fan 56 Refrigerant Pipe 59 Dry Pipe 60 Capillary Tube 62 3-Way Valve

Claims (2)

[Claims] 1. A refrigeration cycle in which a compressor, a condenser, a dry pipe, a capillary tube, and a cooler are sequentially connected, and a refrigerant pipe which is filled with a latent heat storage material and arranged in heat exchange with the storage material. A heat storage device having a, a heat storage cooling refrigerant circuit for freezing the heat storage material by flowing a cooling refrigerant into the refrigerant pipe of the heat storage device in a predetermined midnight time period, and a refrigerator for controlling the blowing of the cold heat source of the heat storage device at a predetermined time in the daytime. Equipped with a blower fan for cooling, a heat storage unit and a blower fan are placed in an adiabatic compartment with a suction port and a discharge port.The heat storage unit has a melting temperature equal to or higher than the freezing room temperature and is used during the midnight hours of summer. It is filled with a latent heat storage material that has a latent heat of fusion equivalent to the remaining operating capacity of the compressor, freezes the storage material when the temperature of the freezer compartment during the midnight hours is lower than the specified temperature, and only during the daytime hours during the specified hours. Suck in the air A heat storage refrigerator equipped with a structure in which cold air cooled by a cold heat source of an intake heat storage device is discharged from a discharge port by a blower fan to cool the intake air of the cooler and the air in the refrigerating room. 2. The temperature of the freezer compartment during the midnight time is connected to the series refrigerant circuit of the dry pipe, the capillary tube and the cooler in parallel with the heat storage cooling refrigerant circuit composed of the heat storage capillary tube and the refrigerant tube of the heat storage device. The heat storage refrigerator according to claim 1, further comprising a configuration for switching to a heat storage cooling refrigerant circuit in which the refrigerant does not flow through the dry pipe only when the temperature is lower than a predetermined temperature.