JP3527592B2 - Freezer refrigerator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve a food preserving condition of a freezing refrigerator having a freezing chamber and a refrigerating chamber by elevating a humidity of the refrigerating chamber while elevating a cold-air blow-off temperature of the refrigerator. SOLUTION: A freezing refrigerator comprises a refrigerating cycle for refrigerating, a refrigerating cycle for freezing, and switching means which switches these two cycles, wherein the refrigerating cycle for refrigerating is formed by connecting a compressor 27, a condenser 28, a first throttling device 29, an evaporator 25 for refrigerating, a second throttling device 30, and an evaporator 22 for freezing in series, while the refrigerating cycle for freezing is formed by connecting the compressor 27, the condenser 28, a third throttling device 31, and the evaporator 22 in series. Due to such a construction, during a freezing chamber refrigerating operation, the refrigerating is carried out using the refrigerating cycle for freezing so as to refrigerate at a low evaporating temperature, while during the refrigerating chamber refrigerating operation, the refrigerating is carried out using the refrigerating cycle for refrigerating so as to operate at a high evaporating temperature so that a blow-off cold-air temperature is elevated and a humidity in the refrigerating chamber is held high even if an amount of food accommodated in the refrigerating chamber is small.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a refrigerating refrigerator that cools a freezing compartment and a refrigerating compartment with a single compressor, and more particularly to a refrigerating refrigerator having a function of keeping high humidity in the refrigerating compartment.

[0002]

2. Description of the Related Art Conventionally, as this type of refrigerator / freezer, there is one disclosed in JP-A-6-265260.

A description will be given below with reference to the drawings. Figure 7
As shown in FIG. 1, reference numeral 1 denotes a refrigerator main body, which defines a freezing compartment 3 and a refrigerating compartment 4 by a partition wall 2 having a suction air passage 2a formed therein. A cooling chamber 5 is provided inside the freezing chamber 3, and an evaporator 6 and a cooling fan 7 are arranged in the cooling chamber 5. 8 is a cold air discharge port to the refrigerator compartment 4,
It communicates with the discharge air passage 9 of the refrigerator compartment 4. Reference numeral 10 denotes a low temperature storage chamber, which is closed by a lid 11 that covers the upper opening. Reference numeral 12 is a humidity control plate attached so as to form a part of the lid 11 of the low temperature storage chamber 10 and adjusts the humidity in the low temperature storage chamber 10 to high humidity. Reference numeral 13 is a gap for taking in a slight amount of cool air from the discharge air passage 9. A vegetable compartment 14 has a vegetable compartment lid 15 that covers the upper opening, a vegetable compartment humidity control plate 16, and a vegetable compartment cold air introduction gap 17 as in the low temperature storage compartment 10.

Reference numeral 18 is a compressor, which is a condenser 19,
The expansion device 20 and the evaporator 6 are sequentially connected to form a refrigeration cycle as shown in FIG.

In the freezer-refrigerator constructed as described above, the cold air generated by the evaporator 6 is cooled by the cooling fan 7.
As a result, it circulates as shown by the arrow in FIG. 7, and the freezer compartment 3, the refrigerator compartment 4, the low temperature storage compartment 10, and the vegetable compartment 14 are cooled to a predetermined temperature. At this time, the cold storage room 10 and the vegetable room 14
Since the amount of cold air flowing into and out of the low temperature storage chamber 10 and the vegetable chamber 14 is designed to be small, when the food is stored in the low temperature storage chamber 10 and the vegetable chamber 14, the humidity in the low temperature storage chamber 10 and the vegetable chamber 14 is increased by the steam generated from the food. By ascending, the humidity control plate 12 and the vegetable room humidity control board 16 maintain the humidity in each of the low temperature storage room 10 and the vegetable room 14 at a high humidity of about 80% RH.

[0006]

However, in the above-mentioned conventional configuration, the freezer compartment 3 and the refrigerating compartment 4 have the same evaporator 6.
Since the low-temperature cold air generated in step 3 cools the humidity in the refrigerating compartment 4, the food is cooled by the low-temperature cold air having a large temperature difference with the food.
There was a fear that the drying of the food inside would be accelerated.

Further, since the low temperature storage room 10 and the vegetable room 14 enhance the airtightness and increase the humidity by the water vaporized from the food, the same low humidity as the refrigerating room 4 when the storage amount of the food is small. There was a fear of becoming.

The present invention solves the above-mentioned conventional problems, and raises the discharge cold air temperature of the refrigerating chamber and
An object of the present invention is to provide a freezer-refrigerator capable of maintaining a high humidity in a refrigerating room, a low temperature storage room and a vegetable room even when the amount of food stored is small.

[0009]

In order to solve the above problems, the present invention provides a freezer compartment provided with a freezing evaporator and a freezer compartment cooling fan, and a refrigerating compartment provided with a refrigerating evaporator and a refrigerating compartment cooling fan. And a first refrigerating cycle for refrigeration in which a compressor, a condenser, a first throttling device, a refrigerating evaporator, a second throttling device, and a freezing evaporator are sequentially connected. A refrigeration cycle in which a third expansion device bypassing the refrigeration evaporator and the second expansion device is connected to the refrigeration evaporator, and a switching means for switching between the refrigeration cycle and the refrigeration cycle. . With the above configuration, during the freezer compartment cooling operation, the refrigeration cycle for refrigeration operates to cool at a low evaporation temperature, and during the refrigeration compartment cooling operation, the refrigeration cycle for refrigeration operates to cool at a high evaporation temperature, The evaporation temperature of the evaporator that cools the refrigerating compartment is raised to raise the discharge cold air temperature of the refrigerating compartment, and the refrigerating compartment, even when the amount of food stored is small,
The humidity of the cold storage room and the vegetable room can be kept high.

[0010]

In order to solve the above problems, the invention according to claim 1 of the present invention provides a freezing chamber cooled by a freezing evaporator and a freezing chamber cooling fan, a refrigerating evaporator and a refrigerating chamber cooling. A refrigerator main body having an independent refrigerating chamber that is cooled by a fan is provided, and includes a compressor, a condenser, a first expansion device, a refrigerating evaporator, and a second refrigerating device.
Refrigeration cycle in which the expansion device and the freezing evaporator are sequentially connected, and a refrigeration system in which the first expansion device, the refrigeration evaporator, and the third expansion device that bypasses the second expansion device are connected to the freezing evaporator. and use the refrigeration cycle, and a switching means for switching the refrigerating cycle and the refrigerating refrigeration cycle, when the freezing compartment cooling operation the compressor and the freezing chamber cold refrigeration refrigeration cycle
The cooling fan is operated to cool it at a low evaporation temperature, and the compressor and
Operate the refrigerating room cooling fan to cool at a high evaporation temperature
However, during the refrigeration cycle operation for freezing, the refrigerating room is cooled.
Operate the fan for a predetermined time, and when the compressor is stopped
The freezing compartment cooling fan is stopped and the refrigeration compartment cooling fan is stopped.
Relative humidity in the refrigerating room by operating for a predetermined time
It will increase

By thus functioning the refrigerating refrigeration cycle, the evaporation temperature of the evaporator for cooling the refrigerating chamber can be raised, the discharge cold air temperature of the refrigerating chamber can be raised, and the refrigerating chamber can be stored even when the amount of food stored is small. High humidity can be maintained in the cold storage room and the vegetable room. Well
In addition, the sublimation and melting of frost adhering to the refrigerator evaporator
Therefore, the humidity in the refrigerating room can be increased.

The invention according to claim 2 is a refrigerating evaporator.
Freezer with a porator and freezer cooling fan and for refrigeration
Separated refrigerator room with evaporator and cooling room cooling fan
It is equipped with a refrigerator body configured as
Sensor, first expansion device, refrigeration evaporator, second expansion device
Cooling device, which is connected in sequence with a cooling device and a freezing evaporator.
Refrigeration cycle for storage, the first expansion device, and refrigeration evaporation
And a third throttling device bypassing the second throttling device
Refrigeration cycle for refrigeration with the equipment connected to a refrigeration evaporator
Between the refrigeration cycle and the refrigeration cycle
And a switching means for changing, and the variable capacity means of the compressor, and the air volume varying means of the refrigerating compartment cooling fan for circulating cold air from the refrigeration evaporator, freezer Ebapore
The variable air volume of the freezer cooling fan that circulates the cool air from the
A stage, a flow rate variation means of the condenser cooling fan for cooling the condenser, the refrigeration evaporator temperature detecting means, and refrigeration evaporator temperature detecting means, and a condenser temperature detecting unit, when freezing compartment cooling operation, the refrigeration For cold
It operates in the freeze cycle and cools at a low evaporation temperature to cool the refrigerator.
At the time of discontinuation operation, the capacity varying means of the compressor and the
The compressor is controlled by the air volume changing means of the freezing room cooling fan.
Freezing by controlling the capacity of the service and the air volume of the freezing room cooling fan
The evaporator evaporator temperature is lower than the freezer setting temperature
The temperature of the compressor has a small difference and
In the force varying means and the air volume varying means of the refrigerating room cooling fan
From the capacity of the compressor and the cooling fan of the refrigerator compartment
Control the air volume to set the temperature of the refrigerator evaporator in the refrigerator room
Controlled to a high evaporation temperature that is lower than the temperature but has a small temperature difference,
Condensation by means of variable air volume of the condenser cooling fan
By suppressing the temperature rise of the compressor,
It is operated by reducing the reduction ratio .

According to this structure, it is possible to prevent a gas shortage due to refrigerant retention in the refrigerating evaporator during the refrigerating and cooling operation, and to set the evaporation temperature of the refrigerating evaporator to a high predetermined evaporation even when load fluctuation or room temperature fluctuation occurs. The temperature can be controlled.

Further, the invention according to claim 3 is for freezing.
Freezer with a evaporator and freezer cooling fan, and refrigeration
Equipped with a refrigerator and a cooling room cooling fan
Equipped with an upright refrigerator body, compressor,
Densa, first expansion device, refrigeration evaporator, second
A throttling device and a freezing evaporator were connected in sequence.
Refrigeration refrigeration cycle, the first expansion device, refrigeration evaporator
A third diaphragm that bypasses the porator and the second diaphragm device.
Refrigerating chiller connected to the refrigerating evaporator.
Switch between the refrigeration cycle and the refrigeration cycle.
It has a switching means for switching, and
Circulates the cold air from the refrigeration evaporator with the force varying means.
Cooling chamber cooling fan air flow rate varying means and freezing evaporator
Variable air volume of the freezer cooling fan that circulates cool air from the engine
And a condenser cooling fan for cooling the condenser.
Air flow rate changing means and freezing evaporator temperature detecting means
And the evaporator temperature detector for refrigeration and the condenser temperature.
Temperature detection means to cool the freezing room during the freezing room cooling operation.
It operates in the freeze cycle and cools at a low evaporation temperature to cool the refrigerator.
At the time of discontinuation operation, the capacity varying means of the compressor and the
The compressor is controlled by the air volume changing means of the freezing room cooling fan.
Freezing by controlling the capacity of the service and the air volume of the freezing room cooling fan
The evaporator evaporator temperature is lower than the freezer setting temperature
The temperature of the compressor has a small difference and
In the force varying means and the air volume varying means of the refrigerating room cooling fan
From the capacity of the compressor and the cooling fan of the refrigerator compartment
Control the air volume to set the temperature of the refrigerator evaporator in the refrigerator room
Controlled to a high evaporation temperature that is lower than the temperature but has a small temperature difference,
Condensation by means of variable air volume of the condenser cooling fan
By suppressing the temperature rise of the compressor,
The cooling fan is operated with a small reduction ratio, and the refrigerating compartment cooling fan is operated for a predetermined time during the refrigeration cycle operation for freezing and when the compressor is stopped.

According to this structure, freezing during refrigerating and cooling operation
Gas shortage due to refrigerant retention in the evaporator can be prevented
And the evaporation temperature of the evaporator for refrigeration changes
Controls to a high predetermined evaporation temperature even when room temperature changes
can do. In addition, the sublimation and melting of the frost attached to the refrigerating evaporator can increase the humidity in the refrigerating room.

[0016]

Embodiments of the present invention will be described below with reference to FIGS. The same components as those of the conventional example shown in FIGS. 7 and 8 are designated by the same reference numerals, and detailed description thereof will be omitted.

(Embodiment 1) In FIG. 1, reference numeral 21 denotes a freezing cooling chamber provided in the freezing chamber 3, in which a freezing evaporator 22 and a freezing chamber cooling fan 23 are arranged. Reference numeral 24 denotes a refrigerating cooling chamber provided inside the refrigerating chamber, and inside the refrigerating evaporator 25 and a refrigerating chamber cooling fan 26 are arranged.

On the other hand, in the refrigeration cycle, as shown in FIG. 2, a compressor 27, a condenser 28, a first expansion device 29, a refrigeration evaporator 25, and a second expansion device 3 are provided.
0, and the refrigeration evaporator 22 is sequentially connected to form a refrigeration refrigeration cycle, and the third expansion device 31 is connected to the first expansion device 29 and the refrigeration evaporator 25.
Then, the second expansion device 30 is bypassed, and the compressor 27, the condenser 28, the third expansion device 31, and the freezing evaporator 22 are sequentially connected to form a freezing refrigeration cycle. A switching unit 32 switches between the refrigerating cycle for refrigeration and the refrigerating cycle for freezing.

In the Mollier diagram for the above refrigeration cycle, as shown in FIG. 3, the dotted line 33 is the refrigeration Mollier diagram during the refrigeration refrigeration cycle operation, and the solid line 34 is the refrigeration cycle during the refrigeration cycle operation. It is a Mollier diagram for a car.

In the above structure, when cooling the freezer compartment 3, the switching means 32 is switched to the refrigerating refrigeration cycle, and the evaporation temperature of the low temperature optimum for cooling the freezer compartment 3 (-30 in this embodiment). C.) is formed, the refrigerating compartment cooling fan 26 is stopped, and the freezing compartment cooling fan 23 is operated to cool the refrigerating compartment 3 to a predetermined temperature.

When the refrigerating chamber 4 is cooled, the switching means 32 is switched to the refrigerating refrigerating cycle to raise the evaporation temperature of the refrigerating evaporator 25 (in this embodiment,
3 ° C.), the evaporation temperature of the freezing evaporator 22 is set to the freezing chamber 3
The Mollier diagram for refrigeration 33 having a lower evaporation temperature (-23 ° C. in this embodiment) that is higher than the evaporation temperature during the refrigeration cycle operation for freezing is formed, and the freezing compartment cooling fan 23 is stopped to stop the refrigeration compartment. The refrigerating compartment 4 is cooled to a predetermined temperature by operating the cooling fan 26.

By repeating this operation, the freezer compartment 3
And the refrigerating chamber 4 are each cooled to a predetermined temperature, but the temperature of the evaporator for refrigeration during the refrigerating cycle for refrigeration is higher than the conventional temperature (-30 ° C) at an evaporation temperature (-3 ° C).
Since it is operated in the above manner, the temperature of the discharged cool air to the refrigerating chamber 4 can be raised and the humidity can be kept high. Further, the low-temperature storage room 10 and the vegetable room 14 provided in the refrigerating room 4 with a high degree of airtightness keep the humidity in each of the low-temperature storage room 10 and the vegetable room 14 at 80% RH even when the food storage amount is small. It is possible to maintain high humidity, and it is possible to suppress the drying of the food stored in each of the refrigerating room 4, the low temperature storage room 10, and the vegetable room 14.

Further, since the refrigeration Mollier diagram 33 is operated at a lower compression ratio than the refrigeration Mollier diagram 34, it is more efficient than the conventional one and the power consumption can be reduced.

(Embodiment 2) In FIG. 4, numeral 35 is a capacity varying means of the compressor 27, which changes the rotational speed of the compressor 27 according to the heat load in the refrigerator to control to a predetermined compressor capacity. 36 is a freezing room cooling fan 2
An air volume changing means for changing the rotation speed of 3 to control a predetermined air volume, and 37 is a temperature detecting means attached to the surface of the freezing evaporator 22.

Reference numeral 38 is an air volume changing means for changing the number of revolutions of the refrigerating compartment cooling fan 26 to control it to a predetermined air volume, and 39 is a temperature detecting means attached to the surface of the refrigerating evaporator 25. Reference numeral 40 is a temperature detecting means attached to the surface of the condenser 28, 41 is a condenser cooling fan, and 42 is an air volume varying means for changing the number of revolutions of the condenser cooling fan 41 to control to a predetermined air volume.

Reference numeral 43 is a refrigerating compartment temperature sensor, 44 is a freezing compartment temperature sensor, and 45 is an outside air temperature sensor. Reference numeral 46 is a control device, which is a refrigerating compartment temperature sensor 43, a freezing compartment temperature sensor 44, an outside air temperature sensor 45, a temperature detecting means 39 of the refrigerating evaporator 25, a temperature detecting means 37 of the refrigerating evaporator 22, and a temperature detecting means of the condenser 28. Based on the output signal from the compressor 40, the compressor 27, the refrigerator compartment cooling fan 26, and the freezer compartment cooling fan 2 are controlled by the capacity varying means 35 and the air volume varying means 36, 38, 42 of the compressor 21.
3, the operation of the condenser cooling fan 41, the stop control, and the capacity control by changing the rotation speed are performed.

The above construction is basically the same as that of the first embodiment, and when the freezing compartment 3 is cooled, the switching means 32 is constituted by the compressor 27, the condenser 28, the third expansion device 31, and the freezing. The freezing evaporator 22 is switched to the freezing refrigeration cycle including the freezing evaporator 22.
Temperature detecting means 37 and the condenser 28 temperature detecting means 4
In response to the output signals of 0 and the outside air temperature sensor 45, the controller 46 causes the air volume changing means 36 to operate the freezing room cooling fan 23.
The air flow rate of the condenser cooling fan 4
1 and the capacity changing means 3 of the compressor 27
5, the capacity of the compressor 27 is varied, and the refrigeration Mollier charts 47 and 4 are set so that the evaporation temperature and the condensation temperature are the minimum power consumption at the operating outside air temperature.
8, the freezer compartment 3 is cooled to a predetermined temperature.

Next, when the refrigerating compartment 4 is cooled, the switching means 32 is set to the compressor 27, the condenser 28, the first
The refrigeration cycle for refrigeration comprising the expansion device 29, the refrigeration evaporator 25, the second expansion device 30, and the freezing evaporator 22 is switched to the refrigeration cycle as shown in the refrigeration Mollier diagrams 49, 50 and 51 in FIG. Evaporator 2
5 is higher than the temperature of the freezer compartment 3, and the freezing evaporator 22
Is an air volume varying means 38 for the air volume of the refrigerating compartment cooling fan 26, an air volume varying means 36 for the air volume of the freezing compartment cooling fan 23, and an air volume varying means for the condenser cooling fan 41 so as to operate at a temperature lower than that of the freezing compartment 3. 42 and the capacity of the compressor 27 is controlled by the capacity changing means 35 of the compressor.

Therefore, the evaporation temperature of the refrigerating evaporator 25 is controlled by the air volume control of the refrigerating compartment cooling fan 26 and the capacity control of the compressor 27 even if the outside air temperature or the cooling load in the refrigerating compartment 4 changes. The high evaporation temperature (-3
C.), the temperature difference between the cold discharge cold air temperature of the refrigerating compartment 4 and the cooled food can be reduced, and the humidity in the refrigerating compartment 4 can be kept high, so that the drying of the food can be suppressed.

On the other hand, the evaporation temperature of the freezing evaporator 22 is controlled by the air volume control of the freezing room cooling fan 23 and the compressor 27.
By controlling the capacity of the above, even if a change in the outside air temperature or a change in the cooling load in the freezer compartment 3 occurs, the evaporation temperature can be maintained at about 3 to 4 ° C lower than the temperature in the freezer compartment (-18 ° C). The problem of the refrigerant condensing and staying in the evaporator 22 can be prevented, and the condensing temperature of the condenser 28 can be prevented from rising by controlling the air volume of the condenser cooling fan 41 even when the load increases, so that the refrigerating refrigeration cycle. The Mollier diagrams 49, 50, 51 for refrigeration during operation are
Refrigeration Mollier diagram 47 during refrigeration cycle operation,
Compared with 48, it is possible to operate in a highly efficient refrigeration cycle with a smaller compression ratio, so that it is possible to reduce power consumption.

(Embodiment 3) This embodiment has basically the same construction as the above-mentioned Embodiments 1 and 2 shown in FIGS. 1 to 5, and further has the same construction during the refrigerating cycle for refrigeration and when the compressor is stopped. A control function for operating the refrigerating room cooling fan for a predetermined time is sometimes provided.

As shown in FIG. 6, the compressor 27 receives detection signals from the refrigerating compartment temperature sensor 43 and the freezing compartment temperature sensor 44, and either the temperature of the refrigerating compartment 4 or the temperature of the freezing compartment 3 is lower than a predetermined temperature. It is controlled to stop when it is low and to drive when it is high.

The switching means 32 is controlled so that it is energized during the refrigerating compartment cooling operation to switch to the refrigerating refrigeration cycle, and is deenergized during the refrigerating compartment cooling operation to switch to the refrigerating refrigeration cycle. The freezing compartment cooling fan 23 is controlled to stop during the refrigerating compartment cooling operation and to operate during the freezing compartment cooling operation. The refrigerator compartment cooling fan 26 has a predetermined time t1 after switching between the refrigerator compartment cooling operation and the freezer compartment cooling operation.
And, it is controlled so as to operate for a predetermined time t2 after the compressor 27 is stopped.

FIG. 6 shows changes in humidity inside the refrigerating chamber 4 due to the above-mentioned operation control. The dotted line shows the conventional humidity change,
Since it is usually operated at a low evaporation temperature of about -30 ° C, the humidity in the refrigerating chamber 4 decreases to an absolute humidity corresponding to a dew point temperature of -30 ° C, and the relative humidity when the refrigerating chamber 4 is set to 3 ° C. Results in a very low relative humidity of around 5% RH. On the other hand, the solid line shows the humidity change in the refrigerator compartment 4 of this embodiment.
During the refrigerating operation, the refrigerating evaporator 25 cools the refrigerating chamber 4, but the evaporation temperature of the refrigerating evaporator 25 is the freezing chamber 3.
The temperature in the refrigerating room 4 is controlled to about −3 ° C. in this embodiment, and therefore the humidity in the refrigerating room 4 decreases only to the absolute humidity corresponding to the dew point temperature of −3 ° C. When the temperature in 4 is 3 ° C, the relative humidity is about 65% RH.
When the temperature of the cold storage room 10 in the refrigerating room 4 is -1 ° C, the relative humidity of about 80% RH can be maintained.

Then, the refrigerating compartment cooling fan is operated for a predetermined time t1 after switching to the freezing compartment cooling operation and for a predetermined time t2 after the compressor 27 is stopped. At this time, since the refrigerant does not flow in the refrigerating evaporator 25, the frost formed on the refrigerating evaporator 25 sublimates and melts due to heat exchange with the air in the refrigerating compartment 4 by the operation of the refrigerating compartment cooling fan 26. , The absolute humidity in the refrigerating room 4 increases, and 65 →
The humidity can be increased to about 80% RH.

As described above, in the case of the present embodiment, the refrigerating compartment cooling fan 26 is configured to operate for a predetermined time when the refrigerating cycle for refrigeration and when the compressor is stopped. Therefore, the frost formed on the refrigerating evaporator 25 is frosted. By sublimation and melting of the, it is possible to increase the humidity in the refrigerator compartment 4,
The drying of food can be significantly suppressed.

[0037]

As is apparent from the above description, claim 1
According to the invention described above, a freezer compartment cooled by a freezing evaporator and a freezer compartment cooling fan, and a refrigerator main body that independently configures a refrigerating compartment and a refrigerating compartment cooled by a refrigerating compartment cooling fan, a compressor, A refrigeration refrigeration cycle in which a condenser, a first expansion device, a refrigeration evaporator, a second expansion device, and a freezing evaporator are sequentially connected, and the first expansion device, the refrigeration evaporator, and the second expansion device are bypassed. A third refrigerating device connected to an evaporator for refrigeration, and a switching means for switching between the refrigerating refrigerating cycle and the refrigerating cycle, and the compressor is the refrigerating refrigerating cycle during a refrigerating compartment cooling operation. And freezer cooling fan
To cool at a low evaporation temperature, and during the refrigerating room cooling operation, the compressor and
Cooled at a high evaporation temperature driving a built chamber cooling fan, wherein
During the refrigeration cycle operation for freezing,
Operates for a predetermined time, and freezes when the compressor is stopped
The room cooling fan is stopped and the refrigerating room cooling fan is turned on at a predetermined time.
By operating for a while, the relative humidity inside the refrigerating room is increased .

Therefore, the evaporation temperature of the evaporator for cooling the refrigerating chamber can be raised, the discharge cold air temperature of the refrigerating chamber can be raised, and the refrigerating chamber, even when the amount of food stored is small,
It is possible to maintain high humidity in the cold storage room and the vegetable room. In addition, sublimation of frost attached to the refrigerator evaporator,
Melting allows for higher humidity in the refrigerator
It

According to a second aspect of the invention, based on the configuration of the first aspect, a compressor capacity varying means is provided.
And flow rate variable means of the refrigerating compartment cooling fan for circulating cold air from the refrigeration evaporator, cold air from the refrigeration evaporator
Means for varying the air volume of the freezing room cooling fan that circulates the
And flow rate variable means of the condenser cooling fan for cooling the capacitor, comprises a freezing evaporator temperature detecting means, and refrigeration evaporator temperature detecting means, and a capacitor temperature detecting means, when the freezing compartment cooling operation is frozen refrigeration cycle luck
And cool it at a low evaporation temperature.
Compressor capacity varying means and the freezing room cooling fan
The capacity of the compressor and the
Evaporator for freezing by controlling the air volume of the freezing room cooling fan
Temperature is lower than the freezer setting temperature, but the temperature difference is small.
And a means for varying the capacity of the compressor,
The compressor is controlled by the air volume changing means of the refrigerating compartment cooling fan.
By controlling the capacity of the Lesser and the air volume of the cooling fan for the refrigerator
The temperature of the refrigerator evaporator is lower than the temperature set in the refrigerator.
Is controlled to a high evaporation temperature with a small temperature difference,
The temperature rise of the condenser is controlled by the air flow rate varying means of the cooling fan.
To reduce the compression ratio of the compressor
It is something that you drive .

Therefore, it is possible to prevent gas shortage due to refrigerant retention in the freezing evaporator during the refrigerating and cooling operation, and
The evaporation temperature of the refrigeration evaporator can be controlled to a predetermined high evaporation temperature even if load fluctuations or room temperature fluctuations occur.
The temperature of the cold storage room and the vegetable room can be kept high.

Further, the invention according to claim 3 is based on the constitution according to claim 1 or 2, and is a refrigeration evaporator.
Freezing room equipped with a cooling fan and a refrigeration evaporator
And the refrigerator compartment with a cooling fan
Equipped with a refrigerator body, compressor, condenser, first
Expansion device, refrigeration evaporator, second expansion device,
And a refrigeration freezer that is sequentially connected to the freezing evaporator.
Icicle, the first expansion device, refrigeration evaporator and
And freeze the third expansion device that bypasses the second expansion device
Refrigeration cycle connected to an evaporator for
Switch to switch between the refrigeration cycle and the refrigeration cycle
And means for changing the capacity of the compressor
And a refrigerating room that circulates cold air from the refrigeration evaporator.
From the cooling fan evaporator and the cooling fan
An air flow rate varying means for a freezing room cooling fan that circulates cold air;
Air volume of condenser cooling fan for cooling condenser
Transformation means, freezing evaporator temperature detection means, for refrigeration
Evaporator temperature detecting means and condenser temperature detecting means
And a refrigeration cycle for refrigeration during the freezing room cooling operation.
To cool at a low evaporation temperature during
Is the capacity varying means of the compressor and the freezer cooling
The capacity of the compressor by means of the variable air flow rate of the cooling fan
And controlling the air volume of the freezing room cooling fan to
The temperature of the vibrator is lower than the set temperature of the freezer but the temperature difference is small.
Set the temperature to a high temperature and change the capacity of the compressor.
And the air flow rate varying means of the refrigerating compartment cooling fan
Controls the capacity of the compressor and the air volume of the refrigeration room cooling fan.
Control the temperature of the evaporator for refrigeration from the temperature set in the refrigerator.
Is controlled to a high evaporation temperature with a small temperature difference,
Condenser temperature by means of variable air flow of condenser cooling fan
By suppressing the rise, the compression ratio of the compressor can be reduced.
The cooling fan is operated for a predetermined period of time when the refrigeration cycle for freezing is operated and the compressor is stopped.

Therefore, the evaporation for freezing during the refrigerating and cooling operation
In addition to preventing gas shortage due to refrigerant retention in the motor,
The evaporation temperature of the evaporator for refrigeration varies depending on the load and room temperature.
Even if it occurs, it can be controlled to a predetermined high evaporation temperature.
It is possible to keep the temperature of the cold storage room and vegetable room high.
Wear. In addition, sublimation of frost attached to the refrigerator evaporator,
By thawing, the humidity of the refrigerator compartment can be made higher.

[Brief description of drawings]

FIG. 1 is a vertical sectional view of a refrigerator-freezer showing a first embodiment of the present invention.

FIG. 2 Diagram of the same refrigeration cycle

[Figure 3] Same Mollier diagram

FIG. 4 is a refrigeration cycle and controller diagram showing Embodiment 2 of the present invention.

FIG. 5: Mollier diagram during the same refrigeration cycle operation

FIG. 6 is an operation explanatory diagram showing Embodiment 3 of the present invention.

FIG. 7 is a vertical sectional view of a conventional refrigerator-freezer.

FIG. 8 is a refrigeration cycle diagram during the same refrigeration cycle operation.

[Explanation of symbols]

3 freezer 4 Refrigerator 22 Evaporator for freezing 23 Freezer cooling fan 25 Refrigeration evaporator 26 Refrigerator cooling fan 27 Compressor 28 capacitors 29 First diaphragm device 30 Second diaphragm device 31 Third diaphragm device 32 switching means 35 Ability varying means 36,38,42 Air flow rate varying means 37, 39, 40 Temperature detection means 41 condenser cooling fan

─────────────────────────────────────────────────── ─── Continuation of the front page (72) Yoshito Kimura, Yoshito Kimura, 4-2-5 Takaidahondori, Higashi-Osaka, Osaka Prefecture Matsushita Refrigerator Co., Ltd. (72) Yoshinori Kawada, 4-chome, Takaidamoto-dori, Higashiosaka, Osaka No. 2-5 Matsushita Refrigerating Machinery Co., Ltd. (56) References JP-A-59-86868 (JP, A) JP-A-61-205768 (JP, A) (58) Fields investigated (Int.Cl. ⁷ , DB) Name) F25D 11/02 F25D 17/06 312

Claims (3)

(57) [Claims] 1. A freezing evaporator and a freezer compartment cooling fan
The refrigerator main body is constituted by a freezer compartment cooled by the refrigerator, an evaporator for refrigeration, and a refrigerating compartment cooled by a cooling fan for the refrigeration compartment.
Refrigeration cycle in which the expansion device, the refrigeration evaporator, the second expansion device, and the freezing evaporator are sequentially connected, and the third expansion device that bypasses the first expansion device, the refrigeration evaporator, and the second expansion device. a throttle device refrigeration refrigeration cycle that is connected to refrigerating evaporator, the refrigerating refrigeration cycle and has a switching means for switching the refrigerating cycle, when the freezing compartment cooling operation the compressor and freezing compartment cooled by a refrigeration refrigeration cycle Cools at a low evaporation temperature by operating a fan, and during the refrigerating room cooling operation, the compressor and the refrigerating room are cooled in the refrigerating cycle
Operate a fan to cool it at a high evaporation temperature,
During the freezing cycle, the cooling fan for the refrigerating compartment is kept for a predetermined time.
When the compressor is stopped, the cooling chamber cooling fan is operated.
Fan to stop and operate the refrigerator cooling fan for a predetermined time.
A freezer-refrigerator characterized by increasing the relative humidity in the refrigerating room by doing so. 2. A freezing evaporator and a freezer compartment cooling fan.
Equipped with a freezer, a refrigeration evaporator and a refrigerator cooling fan.
Equipped with a refrigerator body that independently configured a refrigerator room with a fan
E, compressor, condenser, first expansion device, refrigeration
Evaporator, second expansion device, and freezing evaporator
A refrigerating refrigeration cycle in which a vibrator is sequentially connected;
1 throttling device, refrigeration evaporator and second throttling device
The third expansion device that bypasses the
The connected refrigeration cycle for refrigeration and the refrigeration cycle for refrigeration
And switching means for switching the refrigeration cycle
In addition, the compressor capacity varying means, the cooling chamber cooling fan air volume varying means for circulating the cool air from the refrigerating evaporator, and the cooling air circulating from the refrigerating evaporator.
Cooling the condenser and the air flow rate varying means of the freezing chamber cooling fan
Includes a flow rate varying means of the condenser cooling fan for retirement, the freezer evaporator temperature detecting means, and refrigeration evaporator temperature detecting means, and a capacitor temperature detecting means, frozen
During room cooling operation, the refrigeration cycle for freezing is used to
The compressor is cooled at the starting temperature and the compressor is operated during the cooling room cooling operation.
Variable capacity means and variable air volume of the freezing room cooling fan
By means of the capacity of the compressor and the cooling chamber cooling
Freeze the temperature of the freezing evaporator by controlling the air volume of the fan
If the temperature is lower than the room set temperature but the temperature difference is small,
The capacity varying means of the compressor and the refrigerating room cooling
The capacity of the compressor by means of the variable air flow rate of the cooling fan
And controlling the air volume of the refrigerating room cooling fan,
The temperature of the vibrator is lower than the set temperature of the refrigerator but the temperature difference is small.
It controls to a very high evaporation temperature and
To suppress the temperature rise of the condenser by means of variable air volume
Operate with a smaller compression ratio of the compressor.
Refrigerator and refrigerator characterized by . 3. A freezing evaporator and a freezing room cooling fan.
Equipped with a freezer, a refrigeration evaporator and a refrigerator cooling fan.
Equipped with a refrigerator body that independently configured a refrigerator room with a fan
E, compressor, condenser, first expansion device, refrigeration
Evaporator, second expansion device, and freezing evaporator
A refrigerating refrigeration cycle in which a vibrator is sequentially connected;
1 throttling device, refrigeration evaporator and second throttling device
The third expansion device that bypasses the
The connected refrigeration cycle for refrigeration and the refrigeration cycle for refrigeration
And switching means for switching the refrigeration cycle
And the compressor capacity varying means and the refrigeration evaporation
Air volume of the cooling fan for the cold room that circulates the cool air from the
And a cooling device that circulates the cold air from the freezing evaporator.
Cooling the condenser and the air flow rate varying means of the freezing chamber cooling fan
For cooling the air volume of the condenser cooling fan and refrigeration
Evaporator temperature detecting means and evaporator temperature for refrigeration
Includes detection means and condenser temperature detection means
During room cooling operation, the refrigeration cycle for freezing is used to
The compressor is cooled at the starting temperature and the compressor is operated during the cooling room cooling operation.
Variable capacity means and variable air volume of the freezing room cooling fan
By means of the capacity of the compressor and the cooling chamber cooling
Freeze the temperature of the freezing evaporator by controlling the air volume of the fan
If the temperature is lower than the room set temperature but the temperature difference is small,
The capacity varying means of the compressor and the refrigerating room cooling
The capacity of the compressor by means of the variable air flow rate of the cooling fan
And controlling the air volume of the refrigerating room cooling fan,
The temperature of the vibrator is lower than the set temperature of the refrigerator but the temperature difference is small.
It controls to a very high evaporation temperature and
To suppress the temperature rise of the condenser by means of variable air volume
The compressor is operated with a smaller compression ratio.
And characterized in that the operating predetermined time refrigerating compartment cooling fan at the time and the compressor stops refrigeration refrigeration cycle operation in al
A freezer refrigerator.