JP3098893B2 - refrigerator - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a regenerative refrigerator in which the interior of a refrigerator is kept cool by using a heat storage material.

[0002]

2. Description of the Related Art In recent years, a regenerative refrigerator that cools the inside of a refrigerator using a regenerative material has been proposed from the viewpoint of effective use of late-night power or leveling by peak-cutting power demand.
This is considered as disclosed in Japanese Patent No. 58068.

An example of the above-described conventional regenerative refrigerator will be described below with reference to the drawings.

FIG. 12 is a longitudinal sectional view showing the structure of a conventional regenerative refrigerator, and FIG. 13 is a refrigeration system diagram.
In FIGS. 12 and 13, reference numeral 1 denotes a cool box main body, which is composed of a cabinet 2 having a built-in heat insulating material, a door 3, and a gasket 14 for sealing the door 3 and the cabinet 2. The interior is partitioned into two compartments, an upper freezer compartment 17 and a lower refrigerating compartment 18 by an intermediate partition wall 16 arranged horizontally.

A compressor 4 is connected to a three-way solenoid valve 6 via a condenser 5. Further, a first outlet 6a of the three-way solenoid valve 6 is connected to the compressor 4 via a capillary 7, a cooler 8, and an accumulator 13 in this order. The second outlet 6b of the three-way solenoid valve 6
The accumulator 1 is sequentially passed through a heat storage capillary 10 and a heat storage 10 in which a heat storage material 15 is filled.
3 are connected. Further, a closed loop type thermosiphon 12 is provided between the cooler 8 and the regenerator 10 as a heat transfer path, and a solenoid valve 11 for the regenerator is provided in the middle of the closed loop type thermosiphon 12. Is arranged. The closed loop type thermosiphon 12 is, for example, a gravity type.
A refrigerant is sealed in the closed loop pipe.

Reference numeral 19 denotes a cooling fan for cooling the inside of the refrigerator.
0 and the freezer compartment lower outlet 21 can send out cool air. A freezer compartment suction port 22 is provided in front of the intermediate partition wall 16 on the freezer compartment side, and a freezer intermediate duct 23 extending from the freezer inlet 22 to the cooler 8 is formed horizontally.

[0007] Further, a refrigerator duct 25 extending from the cooling fan 19 to the refrigerator outlet 24 is provided vertically along the back of the refrigerator 8 along the back of the refrigerator. This refrigerator compartment outlet 2
4 can be opened and closed by a damper 26. A refrigerator compartment suction port 27 is provided in front of the intermediate partition wall 16 on the refrigerator compartment side, and a refrigerator compartment intermediate duct 28 extending from the refrigerator compartment inlet 27 to the cooler 8 is formed horizontally. A glass tube heater 29 is arranged at the outlet of the refrigerator compartment intermediate duct 28, and enables the defroster 8 disposed above the glass tube heater 29 to be defrosted.

FIG. 1 shows a refrigerator constructed as described above.
The operation will be described with reference to FIGS.

In the normal cooling operation, the coil of the three-way solenoid valve 6 is not energized, the first outlet 6a is connected, and the compressor 4 is sequentially connected to the cooler through the condenser 5, the three-way solenoid valve 6 and the capillary 7. The refrigerant flow from the cooler 8 to the compressor 4 via the accumulator 13 is formed. The cooler 8 cools the inside of the refrigerator.

On the other hand, the heat storage operation is performed by the three-way solenoid valve 6.
When the coil is energized, the second outlet 6b communicates with the coil 4 to reach the regenerator 10 via the condenser 5, the three-way solenoid valve 6 and the capillary 7 in sequence, and the accumulator from the regenerator 10. A refrigerant flow path to the compressor 4 through the refrigerant storage 13 constitutes the heat storage material 1 in the heat storage 10.
5 is cooled.

The heat storage and cooling operation is performed by the heat storage solenoid valve 1.
By opening 1, the closed loop type thermosiphon 12 cools the regenerator 10 to the cooler 8 and uses the heat to cool the inside of the refrigerator.

Each operation is controlled by a timer function (not shown). During the night when power demand is low (from 23:00 to 7:00 of the next day), the heat storage operation and the normal cooling operation are alternately performed by the timer operation, so that the heat storage material 15 is sufficiently cooled while keeping the internal temperature at the set temperature. For three hours during peak hours (13:00 to 16:00) during the daytime power demand, constant-time regenerative cooling operation is performed instead of normal cooling operation requiring a large amount of electric power to reduce the temperature in the refrigerator. keep.

The defrosting of the cooler 8 is performed by integrating the operation time of the compressor 4 and, when the accumulated time reaches an arbitrary time, energizes the glass tube heater 29 to perform defrosting. An arbitrary time is set so that the number of times of defrosting is about twice a day.

[0014]

However, in the above configuration, since the freezing compartment is included in the heat storage / cooling operation, it is necessary to use a heat storage material having a small latent heat of fusion and having a melting temperature of around -30 ° C. Yes, the effective internal volume of the refrigerator is greatly reduced. In addition, in order to freeze the heat storage material having a melting temperature of around -30 ° C, the evaporation temperature becomes around -40 ° C, and the refrigeration efficiency of the compressor becomes worse than in the normal cooling operation, so that the power consumption increases.

Further, since the regenerator is disposed above the freezer compartment, the stored heat is radiated to the outside of the refrigerator, thereby causing a problem of wasting electric power at night.

The present invention solves the above-mentioned problems. Since the object of the heat storage cooling operation is only the refrigeration temperature portion, a heat storage material having a large latent heat of fusion can be used, and the decrease in the effective internal volume of the refrigerator can be suppressed as much as possible. The evaporation temperature at the time of freezing the heat storage material can be equal to or higher than that during normal operation, and there is no increase in power consumption. Furthermore, since the heat storage device is installed in the refrigerator compartment, the heat radiation from the heat storage device can be used for cooling the refrigerator room, so that a refrigerator that can effectively use electric power is provided.

[0017]

In order to solve the above-mentioned problems, a refrigerator according to the present invention comprises a refrigeration cycle in which a cooler and a heat accumulator having a heat accumulating material disposed inside a refrigerator compartment are connected in parallel or in series. A regenerator fan that sends out cool air in the regenerator, a ventilation duct that communicates the cooler with the regenerator, and a heat storage operation that stores heat in the regenerator at any time and heat stored in the refrigerator. Time control means for performing time control of the heat storage cooling operation for cooling, the melting temperature of the heat storage material is set to a temperature higher than the freezing room temperature, and the target load heat amount of the heat storage cooling operation is set to all the rooms other than the freezing room. The regenerator fan is controlled by the temperature of the freezer compartment and the temperature of the refrigerating compartment, and all of the returned cool air passing through the regenerator is returned to the cooler.

Further, a refrigerating cycle in which a cooler and a heat accumulator having a heat accumulating material disposed in a refrigerator compartment are connected in parallel or in series, a heat accumulator fan for sending cool air in the heat accumulator, and a heat accumulator fan. And a ventilation duct communicating the refrigerator compartment, and a time control means for performing time control of a heat storage operation for storing heat in the heat storage device and a heat storage cooling operation for cooling the refrigerator with the stored heat in an arbitrary time zone, The melting temperature of the heat storage material is set to a temperature higher than the freezing room temperature, the target load heat amount of the heat storage cooling operation is set to all the rooms other than the freezing room, the regenerator fan is controlled by the refrigerating room temperature and passes through the regenerator. Return all of the returned cold air to the refrigerator compartment.

Further, a refrigeration cycle in which a cooler and a heat accumulator having a heat accumulating material disposed in a refrigerator compartment are connected in parallel or in series, a heat accumulator fan for sending out cool air in the heat accumulator, And a ventilation duct communicating the regenerator with the refrigerating compartment; and a time control means for performing time control of a heat storage operation for storing heat in the regenerator and a heat storage cooling operation for cooling the refrigerator with the stored heat during an arbitrary time period. Wherein the melting temperature of the heat storage material is a temperature higher than the freezing room temperature,
The target load heat amount of the heat storage cooling operation is set to all the rooms other than the freezing room, and the regenerator fan is controlled by the freezing room temperature and the refrigerating room temperature, and return cold air passing through the regenerator is freely supplied to the cooler and the refrigerating room. Return at the ratio of

Further, a refrigeration cycle in which a cooler and a heat accumulator having a heat accumulating material disposed in a refrigerator compartment are connected in parallel or in series, a heat accumulator fan for sending cool air in the heat accumulator, and the cooler And a ventilation duct communicating the regenerator with the refrigerator compartment, an air path switching damper disposed in the ventilation duct, and a heat storage operation for storing heat in the regenerator and heat stored in the refrigerator during an arbitrary time period. Time control means for performing time control of the heat storage cooling operation for cooling, the melting temperature of the heat storage material is set to a temperature higher than the freezing room temperature, and the target load heat amount of the heat storage cooling operation is set to all the rooms other than the freezing room. ,
The regenerator fan is controlled by the freezing room temperature and the refrigerating room temperature, and the return air passing through the regenerator is switched by the air path switching damper to switch to the cooler when the compressor is operating and to return to the refrigerating room when the compressor is stopped. It is.

[0021]

According to the present invention, the heat storage material having a large amount of latent heat of fusion can be used, the decrease in the effective internal volume of the refrigerator can be suppressed as much as possible, and the stored heat can be used effectively without increasing the power consumption. .

Further, since the regenerator fan is controlled at the temperature of the refrigerating compartment and the cool air passing through the regenerator is circulated only to the refrigerating compartment, the temperature of the refrigerating compartment can be made uniform.

Further, since the cool air that has passed through the heat accumulator can be returned to the cooler and the refrigerator compartment, the amount of air blown by the heat accumulator fan increases, and the cooling capacity of the heat accumulator can be increased.

Further, since the return air passing through the regenerator is switched by the air path switching damper so as to return to the cooler when the compressor is operating and to return to the refrigerating chamber when the compressor is stopped, refrigeration is performed by a simple control method regardless of the cooling capacity of the regenerator. Room temperature can be made uniform.

[0025]

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

FIG. 1 is a functional block diagram of a refrigerator in one embodiment of the present invention, FIG. 2 is a diagram of a refrigeration system in one embodiment of the present invention, and FIG. 3 is an electric circuit of a main part in one embodiment of the present invention. FIG. 4 is a flowchart in one embodiment of the present invention, and FIG. 5 is a one-day operation state diagram according to room temperature in one embodiment of the present invention.

In FIG. 1 and FIG. 3, reference numeral 30 denotes a cool box main body composed of a cabinet 2 having a built-in heat insulating material, a door 3, and a gasket 14 for sealing the door 3 and the cabinet 2. The interior thereof is divided into two sections by the horizontally arranged heat-insulating partition wall 33 and the upper freezer compartment 17 and the lower refrigerator compartment 18.
And a refrigerator compartment suction port 35 in the heat insulation partition wall 33.
Is formed.

Numeral 62 denotes a cooling room provided in the freezing room 17, in which a cooler 8, a cooling fan 19 and a heater 58 for defrosting the cooler are provided. Mouth.

Numeral 26 denotes a damper for controlling the amount of cold air blown into the refrigerator compartment duct 25 by the cooling fan 19 to the refrigerator compartment 18 to control the refrigerator compartment 18 to a set temperature.

Reference numeral 31 denotes a heat storage unit, and a heat storage container 34 in which a heat storage material 32 is filled and a heat storage material 3 in the heat storage container 34.
2, a heat storage fan 39 for blowing cool air in the heat storage 31, and a heat storage material temperature sensor 57.
Has been arranged.

Reference numeral 37 denotes a heat storage unit suction port formed in the heat storage unit 31, reference numeral 56 denotes a heat storage temperature detecting means for detecting the temperature of the heat storage material 32 by a heat storage material temperature sensor 57 mounted in the heat storage unit 31, and 55. Is a ventilation duct which connects the heat storage unit 31 and the cooling chamber 62 provided on the back of the refrigerator compartment.

Numeral 63 denotes a defrosting start judging means for judging a defrosting start time of the cooler 8 in accordance with a signal from the room temperature detecting means 40.

Only the parts of the electric circuit diagram relevant to the gist of the present invention are shown, and reference numeral 46 denotes C as time control means.
The PU operates according to a program stored in a storage circuit (not shown) as is well known, and includes a clock circuit 45 that outputs the current time, a room temperature detection unit 40, a freezer temperature detection unit 44, and a refrigerator temperature detection unit 75. Control of the relays 47, 49, 51, 53, 59 and 66 is performed by the output signal of. That is, each relay 47, 49, 51, 5
3, 59, 66 connected to each of the transistors 48, 5
By giving a high level signal to the bases 0, 52, 54, 60, 67, each relay 47, 49, 51, 5,
3, 59 and 66 are energized.

When the relay 47 is energized, the compressor 4
Drives. When the relay 49 is energized, the solenoid valve 64 operates to communicate the condenser 5 with the cooler 8. When the relay 51 is energized, the solenoid valve 65 operates to communicate the capacitor 5 and the heat storage 31. When the relay 53 is energized, the cooling fan 19 operates. When the relay 59 is energized, the heater 5
8, the cooler 8 is defrosted, and when the relay 66 is energized, the regenerator fan 39 operates.

The freezer temperature detecting means 44 outputs a signal to the time control means 46 when the value detected by the freezer compartment temperature sensor 43 is equal to or higher than the set temperature. The refrigerator temperature detecting means 75 outputs a signal to the time control means 46 when the value detected by the refrigerator temperature sensor 74 is equal to or higher than the set temperature. Further, the room temperature detecting means 40 digitizes an output voltage of the signal from the room temperature sensor 41 by the A / D converter 42 and outputs a signal to the time control means 46 for the room temperature around the refrigerator. Further, the heat storage temperature detecting means 56 outputs a signal to the time control means 46 when the value detected by the heat storage material temperature sensor 57 is equal to or higher than the set temperature.

In FIG. 2, reference numeral 4 denotes a compressor, which is connected to the solenoid valve 64 and the solenoid valve 65 via the condenser 5. Further, the solenoid valve 64 is connected to the compressor 4 via the capillary 7, the cooler 8 and the accumulator 13 in this order. The solenoid valve 65 is connected to the accumulator 13 via a regenerator capillary 9 and a regenerator cooling pipe 38 arranged in the regenerator 31 in order.

FIG. 1 shows a refrigerator constructed as described above.
The operation will be described with reference to FIGS. 2, 3, 4, and 5.

In the normal cooling operation, the inside of the refrigerator is cooled by using the cooler 8 and kept at a set temperature. That is, CPU4
6, the relay 49 is turned on and the relay 66 is turned off, so that the refrigerant flow path is connected to the cooler 8 (step S5).
1), the regenerator fan 39 is stopped (step S2), and when the internal temperature is equal to or higher than the set value, the signal from the freezer internal temperature detecting means 44 causes the CPU 46 to operate the relays 47 and 5
By turning on the compressor 3 and operating the compressor 4 and the cooling fan 19 (step S3), the cool air from the cooler 8 is supplied to the freezer compartment 17 from the upper outlet 20 of the freezer compartment 17 for the freezer compartment 17.
The inside of the refrigerator is cooled below the set temperature by circulating through the inside of the refrigerator compartment suction port 36 and circulating through the refrigerator compartment duct 25, the damper 26, and the refrigerator compartment 18 through the refrigerator compartment suction port 35. I do.

When the temperature in the refrigerator becomes equal to or lower than the set value, the signal of the temperature detector 44 in the refrigerator becomes OFF and the CPU 4
6 turns off the relays 47 and 53 and stops the circulation of the refrigerant and the cool air (step S4). By repeating the above operation, the inside of the refrigerator is kept cool to the set temperature.

In the heat storage operation, during a predetermined time period during which nighttime power demand is low (from 23:00 to 7:00 of the next day) (step S5), the heat storage material 32 filled in the heat storage device 31 is stored at a predetermined time during the night. The electric power in the time zone is stored instead of heat. That is, when the temperature in the freezer is equal to or higher than the set value, the signal from the freezer temperature detecting means 44 causes the CPU 46 to execute the relay-4
7 and 53 are turned on, the compressor 4 and the cooling fan 1
9 (step S6), and when the temperature in the refrigerator becomes equal to or less than the set value, the CPU 46 turns on the relays 51 and 47 from the signal of the temperature detection means 44 in the freezer so that the refrigerant flow path is The refrigerant is held on the side where the regenerator 31 communicates, and the refrigerant is operated by operating the compressor 4.
The heat storage material 32 is evaporated by the heat storage device cooling pipe 38, and the heat storage material 32 is frozen (step S7).

The weight of the heat storage material 32 is as follows:
The weight is set based on the room in the refrigerated temperature zone at the time of low room temperature (15 ° C.) such as in autumn. That is, the weight is such that all the heat amount equivalent to the total load heat amount of the refrigerating compartment in a predetermined time zone (from 7:00 to 23:00) when the power demand in the daytime is high at the low room temperature can be stored.

In the heat storage cooling operation, the heat stored in the heat storage unit 31 during the daytime power demand peak time is used to cool the return air in a room other than the freezing room. That is, when the freezing room temperature is equal to or higher than the set value, the CPU 46 turns on the relays 47 and 53 according to the signal from the freezer temperature detecting means 44 and operates the compressor 4 and the cooling fan 19 to lower the freezing room to the set temperature. Cool.

The temperature of the refrigerating compartment 18 is controlled to a set temperature by controlling the operation of the regenerator fan 39. When the temperature in the refrigerator compartment is equal to or higher than the set temperature, the CPU 46 sets the relay 66 to O by a signal from the refrigerator temperature detecting means 75.
N (step S8), and by operating the regenerator fan 39, the cool air discharged from the refrigerating room duct 25 into the refrigerating room 18 is sucked into the regenerator 31 from the regenerator suction port 37, and is cooled before being ventilated. It returns to the cooler 8 via the duct 55. Thus, the amount of heat to be cooled by the cooler 8 is only the amount of heat applied to the freezing compartment.

When the internal temperature of the refrigerator falls below the set value, the signal of the freezer internal temperature detecting means 44 is turned off and the CPU 4
6 turns off the relays 47, 53 and 66 and stops the circulation of the compressor and the cool air. By repeating the above operation, the inside of each refrigerator is kept at the set temperature.

Next, a method of controlling the defrosting start time of the cooler 8 will be described with reference to FIGS.

The time of the heat storage operation varies depending on the room temperature. This is because the amount of heat entering from the cabinet 2 and the refrigeration capacity of the system change depending on the room temperature. In summer, when the heat storage operation time is long and the room temperature is high, a signal from the room temperature detecting means 40 that the temperature is arbitrarily set or higher is received. The defrosting start determining means 63 starts defrosting of the cooler 8 during the daytime except for the peak time period in order to secure sufficient heat storage operation time.

In a season in which the heat storage operation time is short and the room temperature is low, the defrost start determination means 63 starts defrosting the cooler 8 in a predetermined time zone at night when power demand is low.

For example, as shown in FIG. 5, when the room temperature is higher than the set temperature, 7:00 and 21:00, and when the room temperature is lower than the set temperature, 2 hours.
At 3 o'clock, start defrosting.

Next, a control method for each operation will be described. The time control means 46 performs the alternate operation of the normal cooling operation and the heat storage operation from 23:00 in a predetermined time period during which nighttime power demand is low (from 23:00 to 7:00 the next day). That is, when the inside temperature is equal to or higher than the set value, the inside is cooled by the normal cooling operation, and when the inside temperature is equal to or less than the set value, the heat is stored in the heat storage operation instead of heat (step S5). , Heat storage temperature detecting means 56
Detects the end of freezing of the heat storage material 32, and ends the heat storage operation (step S10).

The daytime load is estimated by the time control means 46 from the average daytime room temperature of the day before detected by the room temperature detection means 40.

From this estimated value, the time control means 46 determines that at least the daytime power demand is in the peak time zone (13:00 from 13:00).
6:00) is started (step S11). Then, the heat storage temperature detecting means 56
Is sent to the time control means 46, indicating that the cooling capacity of the heat accumulator 31 has been lost due to the temperature exceeding the set temperature.

For example, as shown in FIG. 5, the time of the heat storage cooling operation is 7 hours when the room temperature is 30 ° C., and 16 hours when the room temperature is 15 ° C.

As described above, according to the present embodiment, the refrigerating cycle in which the cooler and the heat accumulator having the heat accumulating material disposed inside the refrigerator compartment are connected in parallel or in series, and the cool air in the heat accumulator is sent out. A regenerator fan, a ventilation duct communicating the cooler with the regenerator, and a regenerative cooling operation for storing heat in the regenerator in an arbitrary time zone and a regenerative cooling operation for cooling the refrigerator with the stored heat. Time control means for performing control, the melting temperature of the heat storage material is set to a temperature higher than the freezing room temperature, the target heat load of the heat storage cooling operation is set to all the rooms other than the freezing room, and the regenerator fan is frozen. Since all of the return cold air passing through the heat accumulator is controlled by the room temperature and the refrigerator temperature and returned to the cooler, a heat storage material having a large latent heat of fusion can be used, and the decrease in the effective internal volume of the refrigerator is suppressed as much as possible, and the consumption is reduced. Electric power There is no increase, it is possible to effectively utilize the stored heat.

Next, a refrigerator according to another embodiment of the present invention will be described with reference to FIGS. The same components as those in the conventional and the above-described embodiments are denoted by the same reference numerals, and detailed description thereof will be omitted.

In the heat storage cooling operation, the heat stored in the heat storage unit 31 is used during the peak time of daytime power demand, and the refrigerator compartment 1 is used.
8 is to be cooled. That is, the temperature of the refrigerating compartment 18 is controlled to a set temperature by controlling the operation of the regenerator fan 39. When the temperature of the refrigerator compartment is equal to or higher than the set temperature regardless of the temperature of the freezer compartment 17, the CPU 46 turns on the relay 66 in response to a signal from the refrigerator temperature detecting means 75 (step S8), and operates the regenerator fan 39. Cold room 1
The air inside 8 is sucked into the heat accumulator 31 from the heat accumulator suction port 37 and cooled, and then the heat accumulator 31 formed on the back of the refrigerator compartment is cooled.
The air circulates in the refrigerator compartment 18 through a ventilation duct 70 communicating the refrigerator compartment 18 with the refrigerator compartment 18. Thereby, even if the temperature of the refrigerator compartment 18 is higher than the set value even when the compressor 4 is stopped, the regenerator can cool the refrigerator compartment 18 and make the temperature uniform.

As described above, according to the present embodiment, a refrigerating cycle in which a cooler and a heat accumulator having a heat accumulating material disposed inside a refrigerator compartment are connected in parallel or in series, and cool air in the heat accumulator is sent out. Regenerator fan, a ventilation duct communicating the regenerator with the refrigerating compartment, and a heat storage operation for storing heat in the regenerator in an arbitrary time zone and a time control for a regenerative cooling operation for cooling the refrigerator with the stored heat. The temperature of the heat storage material is higher than the freezing room temperature, the target load heat amount of the heat storage cooling operation is all the rooms other than the freezing room, and the regenerator fan is a refrigerating room. Since all of the return cold air passing through the regenerator is controlled by the temperature and returned to the refrigerating compartment, the regenerator fan is controlled at the refrigerating compartment temperature, and the cool air passing through the regenerator is circulated only to the refrigerating compartment, so that the refrigerating compartment temperature is reduced. Diagram of uniformity That.

Next, a refrigerator according to another embodiment of the present invention will be described with reference to FIG. The same components as those in the conventional and the above-described embodiments are denoted by the same reference numerals, and detailed description thereof will be omitted.

In the heat storage cooling operation, the heat stored in the heat storage unit 31 during the daytime power demand peaks is used to cool the return air in a room other than the freezing room. That is, when the freezing room temperature is equal to or higher than the set value, the CPU 46 turns on the relays 47 and 53 according to the signal from the freezer temperature detecting means 44 and operates the compressor 4 and the cooling fan 19 to lower the freezing room to the set temperature. Cool.

The temperature of the refrigerating compartment 18 is controlled to a set temperature by controlling the operation of the regenerator fan 39. When the temperature in the refrigerator compartment is equal to or higher than the set temperature, the CPU 46 sets the relay 66 to O by a signal from the refrigerator temperature detecting means 75.
N (Step S8), and by operating the regenerator fan 39, the cool air discharged from the refrigerating room duct 25 and the ventilation duct 71 into the refrigerating room 18 is sucked into the regenerator 31 from the regenerator suction port 37 and cooled. After that, the air returns to the cooler 8 and the refrigerator compartment 18 at a ratio of the opening area of the ventilation duct 71 to the cooler 8 and the refrigerator compartment 18 through the ventilation duct 71 which connects the regenerator 31 to the refrigerator compartment 18 and the cooler 8. . As a result, the amount of cool air blown by the regenerator fan 39 can be increased, and the cooling capacity of the regenerator can be increased.

As described above, according to the present embodiment, a refrigeration cycle in which a cooler and a heat accumulator having a heat accumulating material disposed inside a refrigerator compartment are connected in parallel or in series, and cool air in the heat accumulator is sent out. A regenerator fan, a ventilation duct communicating the regenerator with the regenerator and the refrigerating chamber, a regenerative operation for storing heat in the regenerator at any time, and a regenerative cooling for cooling the refrigerator by the stored heat. Time control means for controlling the operation time, wherein the melting temperature of the heat storage material is higher than the freezing room temperature, the target load heat amount of the heat storage cooling operation is all rooms other than the freezing room, The fan is controlled by the temperature of the freezer compartment and the temperature of the refrigerating compartment, and the returned cool air passing through the regenerator is returned to the cooler and the refrigerating compartment at an arbitrary ratio, so that the cool air that has passed the regenerator is returned to the cooler and the refrigerating compartment. Because you can Increasing the blowing rate of the heat accumulator fan, the cooling capacity of the heat accumulator can be increased.

Next, a refrigerator according to another embodiment of the present invention will be described with reference to FIGS. 9, 10 and 11. The same components as those in the conventional and the above-described embodiments are denoted by the same reference numerals, and detailed description thereof will be omitted.

Reference numeral 73 denotes an air passage switching damper, which is a ventilation duct 7 for communicating the regenerator 31 with the refrigerator compartment duct 25 and the cooler 8.
2 and switches the return air path from the regenerator 31 to the cooler 8 side or the refrigerator compartment duct 25 side. That is, when the temperature of the freezer compartment 17 is equal to or higher than the set temperature, the CPU 46 supplies a high-level signal to the base of the transistor 69 in response to an output signal from the freezer temperature detecting means 44, thereby energizing the relay 68, and the air path. When the switching means 76 is turned on, the air path switching damper 73 is switched to 73a, and the ventilation duct 72 communicates with the refrigerator compartment duct 25.

In the heat storage cooling operation, the heat stored in the heat storage unit 31 is used during the daytime when the power demand peaks, and the return air is cooled in a room other than the freezing room. That is, when the freezing room temperature is equal to or higher than the set value, the CPU 46 turns on the relays 47 and 53 according to the signal from the freezer temperature detecting means 44 and operates the compressor 4 and the cooling fan 19 to lower the freezing room to the set temperature or lower. When the internal temperature of the refrigerator becomes equal to or lower than the set value, the signal of the freezer internal temperature detecting means 44 is turned off, and the CPU 46 turns off the relays 47 and 53 to stop the circulation of the compressor and the cool air. By repeating the above operation, the inside of the freezer compartment 17 is kept cool to the set temperature.

The temperature of the refrigerating compartment 18 is controlled to a set temperature by controlling the operation of the regenerator fan 39. When the temperature in the refrigerator compartment is equal to or higher than the set temperature, the CPU 46 sets the relay 66 to O by a signal from the refrigerator temperature detecting means 75.
N (step S8), and the regenerator fan 39 is operated. When the return air sucked into the heat accumulator 31 from the heat accumulator suction port 37 is cooled and then passed through the ventilation duct 72 and the freezing room temperature is equal to or higher than the set temperature, the air path switching damper 73 is set to 7
3b side (Step S12), returning to the cooler 8, and when the freezing room temperature is lower than the set temperature, the air path switching damper 73 becomes 73a side (Step S13), and returns to the refrigerator compartment duct 25 to circulate only the refrigerator compartment.

As a result, even when the cooling capacity of the regenerator 31 is insufficient, the air passage of the return air to the refrigerator compartment when the compressor 4 is operating is the same as the conventional one, and no special control is required. Can be achieved.

As described above, according to the present embodiment, a refrigerating cycle in which a cooler and a heat accumulator having a heat accumulating material disposed inside a refrigerator compartment are connected in parallel or in series, and the cool air in the heat accumulator is sent out. A regenerator fan, a ventilation duct that communicates the cooler, the regenerator and the refrigerating chamber, an air path switching damper disposed in the ventilation duct, and heat storage that stores heat in the regenerator at any time. And a time control means for performing time control of a heat storage cooling operation for cooling the inside of the refrigerator with the operation and the stored heat, wherein a melting temperature of the heat storage material is higher than a freezing room temperature, and a target load of the heat storage cooling operation. The amount of heat is set to all the rooms other than the freezing room, the regenerator fan is controlled by the freezing room temperature and the refrigerating room temperature, and the return air passing through the regenerator is compressed by the air path switching damper to the cooler during compressor operation. Since Sa stop switch to return to the refrigerating chamber, homogenization of the refrigerating compartment temperature by a simple control method regardless of the cooling capacity of the heat accumulator can be achieved.

[0067]

As described above, according to the present invention, a refrigerating cycle in which a cooler and a heat accumulator having a heat accumulating material disposed inside a refrigerator compartment are connected in parallel or in series, and cool air in the heat accumulator is sent out. A regenerator fan, a ventilation duct communicating the cooler with the regenerator, and a heat storage operation for storing heat in the regenerator in an arbitrary time zone and a time control for a regenerative cooling operation for cooling the refrigerator with the stored heat. The temperature of the heat storage material is higher than the temperature of the freezer compartment, the load heat quantity to be subjected to the heat storage / cooling operation is set to all the rooms other than the freezer compartment, and the regenerator fan is connected to the freezer compartment. The temperature and the temperature of the refrigerator compartment are controlled to return all of the returning cold air passing through the heat accumulator to the cooler.Therefore, a heat storage material having a large latent heat of fusion can be used, and the decrease in the effective internal volume of the refrigerator is suppressed as much as possible. Increase in volume No, it is possible to effectively utilize the stored heat.

Further, a refrigerating cycle in which a cooler and a heat accumulator having a heat accumulating material disposed in a refrigerator compartment are connected in parallel or in series, a heat accumulator fan for sending out cool air in the heat accumulator, and a heat accumulator fan. And a ventilation duct communicating the refrigerator compartment, and a time control means for performing time control of a heat storage operation for storing heat in the heat storage device and a heat storage cooling operation for cooling the refrigerator with the stored heat in an arbitrary time zone, The melting temperature of the heat storage material is set to a temperature higher than the freezing room temperature, the target load heat amount of the heat storage cooling operation is set to all the rooms other than the freezing room, the regenerator fan is controlled by the refrigerating room temperature and passes through the regenerator. Since all of the returned cold air is returned to the refrigerator compartment, the regenerator fan is controlled at the refrigerator compartment temperature and the cool air passing through the regenerator is circulated only to the refrigerator compartment, so that the refrigerator compartment temperature can be made uniform.

Further, a refrigerating cycle in which a cooler and a heat accumulator having a heat accumulating material disposed in a refrigerator compartment are connected in parallel or in series, a heat accumulator fan for sending out cool air in the heat accumulator, And a ventilation duct communicating the regenerator with the refrigerating compartment; and a time control means for performing time control of a heat storage operation for storing heat in the regenerator and a heat storage cooling operation for cooling the refrigerator with the stored heat during an arbitrary time period. Wherein the melting temperature of the heat storage material is a temperature higher than the freezing room temperature,
The target load heat amount of the heat storage cooling operation is set to all the rooms other than the freezing room, and the regenerator fan is controlled by the freezing room temperature and the refrigerating room temperature, and return cold air passing through the regenerator is freely supplied to the cooler and the refrigerating room. , The cool air that has passed through the regenerator can be returned to the cooler and the refrigerating compartment, so that the amount of air blown by the regenerator fan can be increased and the cooling capacity of the regenerator can be increased.

Further, a refrigeration cycle in which a cooler and a heat accumulator having a heat accumulating material disposed in a refrigerator compartment are connected in parallel or in series, a heat accumulator fan for sending out cool air in the heat accumulator, And a ventilation duct communicating the regenerator with the refrigerator compartment, an air path switching damper disposed in the ventilation duct, and a heat storage operation for storing heat in the regenerator and heat stored in the refrigerator during an arbitrary time period. Time control means for performing time control of the heat storage cooling operation for cooling, the melting temperature of the heat storage material is set to a temperature higher than the freezing room temperature, and the target load heat amount of the heat storage cooling operation is set to all the rooms other than the freezing room. ,
The regenerator fan is controlled by the freezing room temperature and the refrigerating room temperature, and the return air passing through the regenerator is switched by the air path switching damper to switch to the cooler when the compressor is operating and to return to the refrigerating room when the compressor is stopped. In addition, a refrigerator that can achieve uniform refrigerator temperature by a simple control method regardless of the cooling capacity of the heat storage device.

[Brief description of the drawings]

FIG. 1 is a functional block diagram of a refrigerator according to an embodiment of the present invention.

FIG. 2 is a refrigeration system diagram of the refrigerator of FIG. 1;

FIG. 3 is an electric circuit diagram of a main part of the refrigerator of FIG. 1;

FIG. 4 is a flowchart of the refrigerator shown in FIG. 1;

FIG. 5 is a diagram showing an operation state of the day according to the room temperature in FIG. 1;

FIG. 6 is a functional block diagram of a refrigerator according to another embodiment of the present invention.

FIG. 7 is a flowchart of the refrigerator shown in FIG. 6;

FIG. 8 is a functional block diagram of a refrigerator according to another embodiment of the present invention.

FIG. 9 is a functional block diagram of a refrigerator according to another embodiment of the present invention.

FIG. 10 is an electric circuit diagram of a main part of the refrigerator of FIG. 9;

FIG. 11 is a flowchart of the refrigerator shown in FIG. 9;

FIG. 12 is a longitudinal sectional view showing the structure of a conventional refrigerator.

FIG. 13 is a refrigeration system diagram of the refrigerator of FIG.

[Explanation of symbols]

 Reference Signs List 8 cooler 31 heat storage device 32 heat storage material 39 heat storage device fan 46 time control means 55 ventilation duct 70 ventilation duct 71 ventilation duct 72 ventilation duct 73 air path switching damper

────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A-5-71847 (JP, A) JP-A-6-331259 (JP, A) (58) Fields investigated (Int. Cl. ⁷ , DB name) F25D 16/00 F25B 5/00 F25D 17/08 303

Claims (4)

(57) [Claims] 1. A refrigeration cycle in which a cooler and a heat accumulator having a heat accumulating material disposed inside a refrigerator compartment are connected in parallel or in series, a regenerator fan for sending out cool air in the regenerator, and the cooler And a ventilation duct communicating the regenerator,
A heat storage operation for storing heat in the heat storage device in an arbitrary time zone; and time control means for performing time control of a heat storage cooling operation for cooling the refrigerator with the stored heat, wherein the melting temperature of the heat storage material is a freezer compartment. The temperature is higher than the temperature, the target load calorie of the heat storage cooling operation is all the rooms other than the freezing room, and the regenerator fan is controlled by the freezing room temperature and the refrigerating room temperature to control all the return cold air passing through the regenerator. A refrigerator, wherein the refrigerator is returned to the cooler. 2. A refrigeration cycle in which a cooler and a heat accumulator having a heat accumulating material disposed inside a refrigerator are connected in parallel or in series, a heat accumulator fan for sending out cool air in the heat accumulator, and the heat accumulator. And a ventilation duct communicating the refrigerator compartment, and a time control means for performing time control of a heat storage operation for storing heat in the heat storage device and a heat storage cooling operation for cooling the refrigerator with the stored heat in an arbitrary time zone, The melting temperature of the heat storage material is set to a temperature higher than the freezing room temperature, the target load heat amount of the heat storage cooling operation is set to all the rooms other than the freezing room, the regenerator fan is controlled by the refrigerating room temperature and passes through the regenerator. A refrigerator that returns all of the returning cold air to the refrigerator compartment. 3. A refrigeration cycle in which a cooler and a heat accumulator having a heat accumulating material disposed inside a refrigerator compartment are connected in parallel or in series, a heat accumulator fan for sending out cool air in the heat accumulator, and the cooler. And a ventilation duct communicating the regenerator with the refrigerating compartment; and a time control means for performing time control of a heat storage operation for storing heat in the regenerator and a heat storage cooling operation for cooling the refrigerator with the stored heat during an arbitrary time period. Comprising, the melting temperature of the heat storage material is a temperature higher than the freezing room temperature, the target load heat amount of the heat storage cooling operation is all rooms other than the freezing room,
A refrigerator, wherein the regenerator fan is controlled by a freezing room temperature and a refrigerating room temperature, and return cold air passing through the regenerator is returned to the cooler and the refrigerating room at an arbitrary ratio. 4. A refrigeration cycle in which a cooler and a heat accumulator having a heat accumulating material disposed inside a refrigerator are connected in parallel or in series, a heat accumulator fan for sending cool air in the heat accumulator, and the cooler And a ventilation duct communicating the regenerator with the refrigerator compartment, an air path switching damper disposed in the ventilation duct, and a heat storage operation for storing heat in the regenerator and heat stored in the refrigerator during an arbitrary time period. Time control means for performing time control of the heat storage cooling operation for cooling, the melting temperature of the heat storage material is set to a temperature higher than the freezing room temperature, and the target load heat amount of the heat storage cooling operation is set to all the rooms other than the freezing room. The regenerator fan is controlled by the freezing room temperature and the refrigerating room temperature, and the return air passing through the regenerator by the air path switching damper should be returned to the cooler when the compressor is operating, and to the refrigerating room when the compressor is stopped. Refrigerator characterized by switching quickly.