JP3361109B2 - Thermal storage 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 heat storage type refrigerator / freezer which stores heat using midnight power and uses the stored energy in the daytime.

[0002]

2. Description of the Related Art In recent years, a compressor is operated to freeze a heat storage material during a stoppage time during a midnight intermittent operation with a small load, and the heat storage energy is used during a time period when the power consumption in the daytime becomes a peak. A heat storage type refrigerator / freezer that reduces the power consumption is being researched.

An example of the above conventional heat storage type refrigerator / freezer will be described below with reference to the drawings. For example, there is a heat storage type refrigerator / refrigerator as known from JP-A-63-247577.

As shown in FIG. 3, the structure of the refrigerating cycle is such that a compressor 1, a condenser 2, a first capillary 3, a second capillary 6 and an evaporator 4 are sequentially connected to each other, and a basic structure of a normal refrigerating refrigerator is used. It constitutes a refrigeration cycle. Reference numeral 5 is a cooling fan of the evaporator 4.

In parallel with the second capillary 6 and the evaporator 4, a series circuit of the first opening / closing stool 14, the third capillary 15 and the refrigerating room regenerator 16, a condenser regenerator 8 and a second circuit.
The series circuits of the open / close valves 12 are connected to each other.

The refrigerating heat storage unit 16 is filled with a latent heat type heat storage material 17 therein, a refrigerant pipe 18 for cooling and freezing the heat storage material 17 is arranged by heat exchange, and fins 19 are provided outside. 20 is a cooling fan for a heat storage device.

The condenser heat storage device 8 is filled with a latent heat type heat storage material 9 therein, and a refrigerant pipe 10 for cooling and freezing the heat storage material 9 is provided.
Are arranged in a heat exchange manner. And a third connecting the outlet of the condenser 2, the condenser heat storage 8 and the second on-off valve 12
A refrigeration cycle is configured by providing a refrigerant circuit having the open / close valve 11 of FIG.

A control circuit 13 controls the compressor 1, the first opening / closing valve 14, the second opening / closing valve 12, the third opening / closing valve 11, the cooling fan 5, and the cooling fan for the heat accumulator as shown by the dotted arrow. To do.

FIG. 4 is a vertical cross-sectional view showing the structure of the refrigerator-freezer, and the portions corresponding to those in FIG. 3 are designated by the same reference numerals. The cooler 4 is arranged in the freezer compartment 21, the refrigerating compartment heat storage unit 16 is arranged in the refrigerating compartment 22, and the condenser heat storage unit 8 is arranged in the heat insulating wall 23 of the freezing compartment 21.

Reference numeral 23 is for discharging a part of the cold air cooled by the cooler 4 by the damper thermostat into the refrigerating compartment 22 to control the refrigerating compartment 22 to an arbitrary temperature.

In this configuration, the first cooling operation is performed during the normal cooling operation.
The opening / closing valve 14, the second opening / closing valve 12, and the third opening / closing valve 11 are all closed, and the compressor 1 to the condenser 2 to the first capillary 3 to the second capillary 6 to the evaporator 4 to the compressor The refrigerating cycle consisting of the first route is formed, and the cooling fan 5 and the damper thermostat 23 cool the freezing chamber 21 and the refrigerating chamber 22 to a predetermined temperature.

During the midnight heat storage operation, the first on-off valve 14 and the second on-off valve 12 are intermittently opened, and the refrigerant is stored in the refrigerant pipes 18 and 10 of the refrigerating compartment regenerator 16 and the condenser regenerator 8, respectively. Flows, the heat storage materials 17 and 9 are frozen, and the cold heat source stores heat.

During a predetermined daytime heat storage utilization operation, the first opening / closing valve 14 and the second opening / closing valve 12 are closed, and the third opening / closing valve 12 is closed.
The open / close valve 11 is opened, and the compressor 1 to the condenser 2 to the condenser heat storage 8 to the second capillary 6 to the evaporator 4 to the compressor 1
To form a refrigeration cycle consisting of

Then, the freezing compartment 21 is cooled in a refrigeration cycle having a low compression ratio, in which the cold heat source of the condenser heat storage device 8 is used as the cooling heat source of the condenser 2. Further, since the refrigerating compartment 22 operates the cooling fan 20 for the regenerator and is cooled by the cold heat source of the regenerator 16 for the refrigerating compartment, the power consumption can be significantly reduced as compared with the normal cooling operation.

[0015]

However, in the above-mentioned conventional structure, since two heat accumulators are required, the refrigerating cycle structure is complicated and the cost is increased, and the condensation temperature is lowered when the outside air temperature is high such as in summer. By doing so, the amount of power used can be significantly reduced, but when the outside air temperature is low except during summer, the effect of lowering the condensation temperature is lessened, and the melting rate of the frozen heat storage material in the regenerator decreases and There was a problem that the effect of reducing the amount of electric power was significantly reduced.

Further, since the thickness of the heat storage material is uniform, the heat storage material in the vicinity of the cold air inlet for heat exchange with the cool air having a high temperature is quickly melted, so that the cooling surface area is decreased with time and the cooling capacity is lowered. Had.

Further, since the condensing temperature during the heat storage utilization operation is lowered, a part of the condenser cannot be used for preventing the publication of the cabinet of the refrigerator / freezer, and therefore it is necessary to separately provide a publication preventing heater, which causes an increase in power consumption. Was becoming.

The present invention solves the above-mentioned conventional problems, and provides a heat storage type refrigerator / freezer which can reduce the daytime power consumption of the refrigerator / freezer throughout the year and can effectively use the heat storage energy stored in the heat storage unit. It is a thing.

[0019]

In order to solve the above problems, a heat storage type refrigerator / freezer of the present invention comprises a compressor, a condenser, and a cap.
Normal cooling and refrigeration cycle by connecting the pilari and evaporator in sequence
A refrigerant pipe having constituent elements and having a latent-heat type heat storage material filled in parallel with the evaporator and arranged in heat exchange with the heat storage material.
Comprising a heat accumulator for a refrigerating compartment and take advantage of the cooling source of the heat accumulator
A thermal storage dexterity cooling fan you cool, the outside air temperature is high
It is obtained with a hand stage you also be used as a cooling heat source of the condenser cooling source regenerator is detected by the outside air temperature sensor passing a condensed refrigerant in the refrigerant pipes of the heat accumulator.

Further, the heat accumulator is arranged on the refrigerating compartment side of the heat insulation partition wall of the freezing compartment and the refrigerating compartment, and the thickness of the heat accumulating material of the heat accumulator on the inlet side of the flow of cold air during the operation of the cooling fan for the regenerator is increased. ,
When the thickness of the heat storage material on the outlet side is reduced, a refrigerant pipe is placed near the freezer side wall of the heat storage device, and when the cold heat source of the heat storage device is used as the cooling heat source of the condenser, it is placed in the thin part of the heat storage material. It is provided with a means for causing the condensed refrigerant to flow using the thus formed refrigerant pipe as an inlet.

Further, when the cabinet surface temperature of the refrigerator / freezer in which a part of the condenser is heat-exchanged becomes lower than a predetermined temperature, it serves as a cooling heat source for the condenser until the cabinet temperature rises to a predetermined temperature or higher. The refrigerating cycle to be used is switched to a normal refrigerating cycle.

[0022]

According to the present invention, with the above-described structure, the cooling heat source stored in one heat accumulator is used as both the cooling of the refrigerating chamber and the cooling source of the condenser when the outside air temperature is high, and the outside air temperature is low. At this time, it can be used only for cooling the refrigerating room, so the refrigeration cycle configuration can be simplified and a large amount of power can be cut in summer when the outside air temperature is high.

Further, in the winter when the outside air temperature is low, all the cold heat sources stored in the regenerator can be used for cooling the refrigerating room, so that the cooling time by the regenerator can be significantly lengthened and the power consumption during the daytime can be greatly increased. Can be reduced.

Therefore, a large energy saving effect can be obtained throughout the year as compared with the conventional case.

Further, since the heat storage material on the cold air inlet side of the heat storage device is thickened, it is possible to prevent the heat storage material near the inlet from being quickly melted and the cooling area being reduced with time as in the conventional case. In addition, the refrigerant pipe is arranged on the freezer side in the regenerator with the slowest melting of the heat storage material, and the condensed refrigerant is allowed to flow in from the refrigerant pipe on the cold air outlet side, so that the heat storage material of the heat storage device can be uniformly melted. Therefore, the accumulated heat storage source can be used to the maximum extent.

Further, since the cold heat source of the regenerator can be switched between the refrigeration cycle used as the cooling heat source of the condenser and the normal refrigeration cycle so that the surface temperature of the cabinet of the refrigerator / freezer does not fall below a predetermined temperature. Part of this can be used to prevent perspiration from the cabinet, and the addition of a perspiration prevention heater can prevent an increase in electricity.

[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 refrigeration cycle diagram of a heat storage type refrigerator according to an embodiment of the present invention. In the figure compressor 2
5, the condenser 26, the first capillary 27, the second capillary 28, and the evaporator 29 are sequentially connected to constitute a refrigeration cycle during normal cooling operation of the refrigerator / freezer. Reference numeral 30 is a cooling fan of the evaporator 29.

Then, the second capillary 28 and the evaporator 2
A series circuit composed of a third capillary 31, a heat accumulator 32, and a first opening / closing valve 33 is connected in parallel with the series circuit of 9.

A latent heat type heat storage material 34 is provided in the heat storage device 32.
And a refrigerant pipe 35 is arranged in heat exchange with the heat storage material 34, and fins 36 are provided on the outer surface of one side of the heat storage device 32.

Reference numeral 37 is a cooling fan for the heat accumulator. And the refrigerant circuit which has the 3rd on-off valve 38 which connects the outlet of the condenser 26, and the thermal storage 32 and the 2nd on-off valve 33 is provided.

A control circuit 39 controls the compressor 25, the cooling fan 30, the regenerator cooling fan 37, the first opening / closing valve 33, and the second opening / closing valve 38.

FIG. 2 is a vertical cross-sectional view showing the structure of the refrigerator-freezer, and parts corresponding to those in FIG. 3 are designated by the same reference numerals.

The heat accumulator 32 is arranged on the side of the refrigerating compartment 41 of the heat insulating partition wall 42 between the freezing compartment 40 and the refrigerating compartment 41 so that the fins 36 come to the side of the refrigerating compartment 41. Reference numeral 43 denotes an air passage component, which operates the cooling fan 37 for the regenerator to circulate the cool air cooled by the regenerator 32 as indicated by a solid arrow to cool the refrigerating compartment.

The heat accumulator 32 changes the thickness of the heat storage material 34 along the flow direction of the cold air, and the thicker the cold air inlet side is,
The outlet side of cold air is thin.

The refrigerant pipe 35 is arranged in heat exchange with the heat storage material 34 on the freezer compartment 40 side from the center of the heat storage material 32, and when cooling the heat storage material 34, it is arranged in a thick portion of the heat storage material 34. The refrigerant flows through the refrigerant pipe 35, and when used as a cooling heat source for the condenser 26, the refrigerant flows through the refrigerant pipe 35 arranged in the thin portion of the heat storage material 34.

Reference numeral 44 denotes a damper thermo that discharges the cool air cooled by the evaporator 29 into the refrigerating chamber 41 to cool the refrigerating chamber 41 to a predetermined temperature.

Reference numeral 26a is a dry pipe in which a part of the condenser 26 is arranged in the cabinet portion 45 at the door opening, and prevents the cabinet portion 45 from sweating.

In this configuration, the operation during the normal cooling operation will be described first. The first on-off valve 3 during normal cooling operation
3, the second on-off valve 38 is closed, and the compressor 25 to the condenser 2
6 to the first capillary 27 to the second capillary 28 to the evaporator 29 to form a refrigeration cycle, and the cooling fan 30 and the damper thermostat 44 cool the freezing chamber 40 and the refrigerating chamber 41 to a predetermined temperature. .

Next, the operation during the heat storage operation will be described.
During the midnight heat storage operation, the first open / close valve 33 is intermittently opened, and the refrigerant flows through the refrigerant pipe 35 of the heat storage device 32.
The cold heat source stores heat by freezing the latent heat type heat storage material 34 filled in the inside 2.

Next, the operation during the heat storage operation during the day will be described. During the heat storage utilization operation for a predetermined time in the daytime, the first opening / closing valve 33 is closed, the second opening / closing valve 38 is opened, and the compressor 25
-Condenser 26-Heat accumulator 32-Third capillary 31-Second capillary 28-Evaporator 29 A refrigeration cycle with a small compression ratio using the cold heat source of the heat accumulator 32 as the cooling heat source of the condenser 26 Form and cool the freezer compartment 40. The refrigerating chamber 41 operates the regenerator cooling fan 37, and the refrigerating chamber 41 is cooled by the cold heat source of the regenerator 32.

The second on-off valve 38 is controlled by an outside air temperature sensor (not shown) and a temperature sensor (not shown) for detecting the temperature of the cabinet in which the dry pipe 26a is installed, so that the outside air temperature seems to be summer. When it is extremely high, the second opening / closing valve 38 is opened during the heat storage operation, and the cooling source of the heat storage device 32 is also used as the cooling heat source of the condenser 26, thereby significantly reducing the amount of power consumption.

When the outside air temperature is low except in summer, the second on-off valve 38 is closed and the cold heat source of the heat accumulator 32 is used as the refrigerating chamber 41.
It is only used for cooling.

Therefore, the cooling heat source of one regenerator 32 is used as the cooling heat source of the condenser 26 and the refrigerating chamber 4 is used.
Since it can be used for cooling 1, the structure of the refrigeration cycle can be simplified. In addition, since the cooling heat source of the regenerator 32 can be effectively used for cooling the refrigerating chamber 31 even when the outside air temperature is low such as in winter, the cooling time by the regenerator 32 should be significantly extended in the winter when the outside air temperature is low. It is possible to reduce power consumption in the daytime significantly, and it is possible to obtain a great energy saving effect throughout the year.

Further, the heat storage material 3 on the cold air inlet side of the heat storage device 32 in which the heat storage material 34 quickly melts by exchanging heat with the cold air having a high temperature.
Since the thickness of 4 is thicker than that of the cool air outlet side, it is possible to prevent the cooling surface area from decreasing.

Further, since the refrigerant pipe 35 is arranged near the side of the freezing chamber 40, which has the slowest melting in the heat storage device 32, the heat storage device 32
It is possible to effectively use the cold heat source in which the melting rate of the heat storage material 34 inside is increased and heat is stored.

When the temperature difference between the outside air temperature and the temperature of the cabinet 45 containing the dry pipe 26a exceeds a predetermined temperature difference, the second on-off valve 38 is closed.
When the temperature difference becomes smaller than a predetermined temperature difference, the second on-off valve 38 is opened to prevent sweating of the cabinet 45 even when the cold heat source of the heat storage device 32 is used as the cooling heat source of the condenser 26.

As described above, according to this embodiment, the compressor 25, the condenser 26, the first capillary 27, the second capillary 28 and the evaporator 29 are sequentially connected to each other to have the normal cooling / refrigeration cycle components. In the refrigerator-freezer, the evaporator 2
9 is equipped with a regenerator 32 having a refrigerant pipe 35 that is filled with a latent heat type regenerator material 34 in parallel with and arranged in heat exchange with the regenerator material 9, and uses a cooling source of the regenerator 32 to make a refrigerating room. And a means for using a cooling source of the regenerator 32 as a cooling heat source of the condenser 26 by causing a condensed refrigerant to flow through the refrigerant pipe 35 of the regenerator 32 when the outside air temperature is high. It is a thing.

As a result, the cooling heat source of the single heat storage device 32 can be used as the cooling heat source of the condenser 26 and also used for cooling the refrigerating chamber 41, so that the refrigeration cycle configuration can be simplified.

When the outside air temperature is high, the cooling source of the heat accumulator 32 is used as the cooling heat source of the condenser 26 and the cooling of the refrigerating chamber 41, so that a significant power peak cutting effect can be obtained.

Further, even when the outside air temperature is low, such as in winter, all the cooling heat sources of the heat accumulator 32 can be effectively used to cool the refrigerating chamber 31, so that the heat accumulator 3 is used in the winter when the outside air temperature is low.
Since the cooling time by 2 can be significantly lengthened and the power consumption during the daytime can be greatly reduced, a large energy saving effect can be obtained throughout the year.

The heat accumulator 32 is provided in the freezer compartment 40 and the refrigerator compartment 41.
Is arranged on the refrigerating chamber 41 side of the adiabatic partition wall part 42, and the thickness of the heat storage material 34 of the heat storage device 32 on the inlet side in the flow direction of the cool air during the operation of the cooling fan 37 for the heat storage device is thicker, and the heat storage material 3 on the outlet side 3
4, the refrigerant pipe 35 is arranged closer to the freezing chamber 40 than the center of the heat accumulator 32, and the refrigerant from the condenser 26 is caused to flow through the thin refrigerant pipe 35 of the heat storage material 34 as an inlet. It was done like this.

As a result, the heat storage material 34 on the cold air inlet side of the heat accumulator 32, in which the heat storage material 34 melts quickly by exchanging heat with cold air having a high temperature, is made thicker than the cold air outlet side, so that the cooling surface area is reduced. Can be prevented.

Further, since the refrigerant pipe 35 is arranged near the freezing chamber 40 side, which is the slowest melting in the heat storage device 32, the heat storage device 32 is
It is possible to effectively use the cold heat source in which the melting rate of the heat storage material 34 inside is increased and heat is stored.

Further, the condenser 26 is arranged in the wall surface of the cabinet 45 of the refrigerator / freezer, and when the temperature of the cabinet 45 becomes lower than a predetermined temperature, the condenser 26 is cooled until the cabinet temperature 45 rises to a predetermined temperature. It is provided with a means for switching from a refrigeration cycle used as a heat source to a normal refrigeration cycle.

As a result, even when the cold heat source of the heat storage device 32 is used as the cooling heat source of the condenser 26, it is possible to prevent perspiration of the cabinet 45.

[0057]

The present invention as described above, according to the present invention includes a compressor condenser and sequentially connecting the capillary and the evaporator have a normal refrigeration cycle components, latent heat type therein in parallel with the evaporator < br /> A regenerator having a regenerator having a refrigerant pipe filled with a regenerator and arranged in heat exchange with the regenerator, cooling fan for a regenerator using a cooling source of the regenerator, and outside temperature this is high
Is detected by an outside air temperature sensor , the condensed refrigerant is caused to flow through the refrigerant pipe of the heat storage device, and the cooling source of the heat storage device is also used as a cooling heat source of the condenser.

As a result, one cooling heat source for the regenerator can be used as a cooling heat source for the condenser and can also be used for cooling the refrigerating chamber, so that the refrigeration cycle configuration can be simplified.

Further, when the outside air temperature is high, the cooling source of the heat accumulator is used as the cooling heat source of the condenser and also used for cooling the refrigerating chamber, so that a great effect of cutting the electric power peak can be obtained.

Further, even when the outside air temperature is low such as in winter, all the cooling heat sources of the heat accumulator can be effectively used for cooling the refrigerating chamber 3, so that the cooling time by the heat accumulator is significantly lengthened in the winter when the outside air temperature is low. This makes it possible to significantly reduce the amount of power used during the daytime, so a large energy saving effect can be obtained throughout the year.

Further, the heat accumulator is arranged on the refrigerating compartment side of the heat insulation partition wall of the freezer compartment and the refrigerating compartment, and the thickness of the heat accumulating material of the heat accumulator on the inlet side in the flow direction of the cool air during the operation of the cooling fan for the regenerator is increased. , Reduce the thickness of the heat storage material on the outlet side, arrange the refrigerant pipe from the center of the heat storage device to the freezer compartment side, and let the refrigerant from the condenser flow through the refrigerant pipe of the thin portion of the heat storage material as the inlet. It is the one.

As a result, the thickness of the heat storage material on the cold air inlet side of the regenerator in which the heat storage material melts quickly by exchanging heat with cold air having a high temperature is made thicker than that on the cold air outlet side, so that the cooling surface area is prevented from decreasing. it can.

Further, since the refrigerant pipe is arranged in the vicinity of the freezing compartment side, which has the slowest melting rate in the heat accumulator, the melting rate of the heat accumulating material in the heat accumulator is increased, and the cold heat source thus accumulated can be effectively used.

Further, the condenser is arranged in the cabinet wall surface of the refrigerator / freezer, and when the temperature of the cabinet falls below a predetermined temperature, it is used as a heat source for cooling the condenser until the temperature of the cabinet rises to a predetermined temperature. It is provided with means for switching from the cycle to the normal refrigeration cycle.

As a result, even when the cold heat source of the heat accumulator is used as the cooling heat source of the condenser, it is possible to prevent perspiration of the cabinet.

[Brief description of drawings]

FIG. 1 is a refrigeration cycle configuration diagram of a heat storage type refrigerator / refrigerator according to an embodiment of the present invention.

FIG. 2 is a longitudinal sectional view showing the structure of the heat storage type refrigerator / freezer of the embodiment.

FIG. 3 is a refrigeration cycle configuration diagram of a conventional heat storage type refrigerator / freezer.

FIG. 4 is a vertical cross-sectional view showing the structure of a conventional heat storage type refrigerator / freezer.

[Explanation of symbols]

25 compressor 26 condenser 27 First Capillary 28 Second Capillary 29 Evaporator 32 heat accumulator 34 Heat storage material 35 Refrigerant tube

Front page continuation (58) Fields surveyed (Int.Cl. ⁷ , DB name) F25B 1/00-5/04 F25D 11/02 F25D 16/00

Claims (2)

(57) [Claims] 1. A compressor, a condenser, a capillary, and an evaporator.
With the normal cooling and refrigeration cycle components connected in sequence,
A heat storage material is filled with a latent heat storage material in parallel with the evaporator.
Equipped with a heat accumulator having a refrigerant pipe arranged in heat exchange with
The regenerator that uses the cooling source of the regenerator to cool the refrigerator compartment.
Temperature fan for the cooling fan and the high outside temperature
Detected by the flowmeter and let the condensed refrigerant flow through the refrigerant pipe of the heat storage unit.
Hands that use the cooling source of the regenerator as the cooling heat source of the condenser
Comprising a stage, placing the heat accumulator to the refrigerating chamber side of the heat insulating partition wall portion of the freezing chamber and the refrigerating chamber, the thickness of the heat storage material of the heat accumulator of the heat storage dexterity cooling fan cooling air flow direction inlet side during operation the thicker is, the thickness of the outlet side of the heat storage material, the refrigerant tube arranged central more freezing chamber side of the heat accumulator, the condenser refrigerant tube of a thin portion of the thickness of the heat storage material as inlet Refrigerator with heat storage characterized by flowing the refrigerant from. 2. A compressor, a condenser, a capillary, and an evaporator.
With the normal cooling and refrigeration cycle components connected in sequence,
A heat storage material is filled with a latent heat storage material in parallel with the evaporator.
Equipped with a heat accumulator having a refrigerant pipe arranged in heat exchange with
The regenerator that uses the cooling source of the regenerator to cool the refrigerator compartment.
Temperature fan for the cooling fan and the high outside temperature
Detected by the flowmeter and let the condensed refrigerant flow through the refrigerant pipe of the heat storage unit.
Hands that use the cooling source of the regenerator as the cooling heat source of the condenser
Includes a stage, the condenser was arranged in the cabinet wall of refrigerator, when the temperature of the cabinet is equal to or less than a predetermined temperature, the condenser of the cooling heat source to a temperature of the cabinet is increased to a predetermined temperature A heat storage type refrigerator / refrigerator comprising means for switching a refrigeration cycle used as a normal refrigeration cycle.