JP2002188877A - Refrigerator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a refrigerator, in which operation for a rapid cooling or a rapid defrosting of a variable temperature chamber can be done without having influence on other storage chambers, and foods, etc., placed in the variable temperature chambers are uniformly and rapidly cooled or defrosted. SOLUTION: The refrigerator is provided with an independent variable temperature chamber 4 to be regulated in a wide range from freezing to refrigeration, a fan 15 for sending cooling air, an inlet 21, a damper 24, a chamber fan 26 for agitation or circulation of the air in the chamber 4, and a controller for controlling respective equipment. The operation of the fan 26 and opening/ closing of the damper 24 are controlled at the command of rapid cooling or rapid defrosting.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a refrigerator, and more particularly to a refrigerator having an independent storage room having a rapid cooling or rapid thawing operation function and capable of controlling the temperature in a wide temperature range from freezing to refrigeration. Things.

[0002]

2. Description of the Related Art As a conventional refrigerator having a thawing / rapid cooling chamber, a thawing / rapid cooling chamber is provided in a refrigeration chamber as disclosed in, for example, Japanese Patent Application Laid-Open No. 6-221739 (Prior Art 1). There are things that are. This thawing and rapid cooling chamber is
A damper provided at the opening of the cool air introduction passage, a circulation fan provided at the rear, a large number of ejection holes provided at the ceiling and lower surfaces, a slit provided at the back plate, and a small door provided at the front. It has. During thawing, the damper is shut off and air in the same room or air heated by a heater or the like is heated. After jetting from the hole at high speed and hitting the food, most of the food is returned to the slit on the back, and a part is discharged from the gap in the upper half of the small door. In addition, the thawing heater is installed in an L shape so that the temperature of the jet air on the ceiling side is higher than that on the bottom side during thawing.

A conventional refrigerator having a weak freezing compartment is disclosed in Japanese Patent Application Laid-Open No. Hei 10-197130 (prior art 2).
As shown in FIG. 2, there is a refrigerator in which a weak freezing room 5 is provided in a refrigerator main body so as to be able to store at a temperature suitable for eating and to freeze and store it so as not to freeze too much or not too hard. This weak freezer is located next to the freezer,
Both the ice making room and the refrigeration room are configured as independent rooms partitioned by heat insulating walls. Then, cold air is supplied to the weak freezing room through the damper device to the weak freezing room, and the weak freezing room 5 is selectively set to any one of “0 ° C. to −17 ° C.”. It is set and controlled to the set temperature.

[0004]

However, in the prior art 1, since the thawing / rapid cooling chamber is provided in the refrigerator compartment, food in the refrigeration chamber around the thawing / rapid cooling chamber freezes, There are limits to increasing the thawing / cooling speed due to the adverse effects such as being heated, and the adoption of operating functions such as rapid freezing in a temperature zone that is significantly different from the storage temperature will affect the surrounding foods. It was extremely difficult to consider.

In the prior art 2, since cold air is merely supplied to the weak freezing room through the damper device, the food is not cooled by the fast flow of the cool air in the weak freezing room, but is rapidly cooled or rapidly thawed. It was not equipped with the driving function described above, and the usability was not good.

SUMMARY OF THE INVENTION It is an object of the present invention to perform rapid cooling or rapid thawing operation in a variable temperature room without affecting food in another storage room, and to uniformly dispose of food and the like charged into the variable temperature room. Another object of the present invention is to provide a refrigerator that can be cooled or thawed quickly and with high speed.

[0007]

SUMMARY OF THE INVENTION In order to achieve the above object, a feature of the present invention is that an independent variable temperature chamber that can be adjusted to a wide temperature range from freezing to refrigeration, and that the variable temperature chamber is provided with an evaporator. A cool air blower fan for supplying cool air, an introduction path for introducing cool air into the variable temperature chamber, a damper provided in the introduction path, a temperature sensor for detecting a temperature of the variable temperature chamber, and cold air in the variable temperature chamber. And a control device for controlling each device of the refrigerator, wherein the control device operates the fan in the refrigerator and opens and closes the damper based on a command such as quick cooling or quick thawing. In that it has a control means for controlling

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below with reference to FIGS.

FIGS. 1 to 3 show the overall structure of a refrigerator according to the present invention.
This will be described with reference to FIG. 1 is a longitudinal sectional view of a refrigerator according to an embodiment of the present invention, FIG. 2 is a front view of the refrigerator of FIG. 1, and FIG. 3 is an enlarged sectional detailed view of a variable temperature chamber portion of the refrigerator of FIG.

In the refrigerator body 1, a refrigerator compartment 2, a vegetable compartment 3, a variable temperature compartment 4, an upper freezer compartment 5, and a lower freezer compartment 6 are independently formed from above. Each of the storage rooms 2 to 6 is provided with a door 7 to 11. The refrigerating compartment 2, the vegetable compartment 3, and the freezing compartments 5 and 6 have a function as an ordinary general storage compartment, and a detailed description thereof will be omitted.

The evaporator 12 is an evaporator for the refrigerating cycle on the refrigerator compartment side, and is arranged on the back side of the vegetable compartment 3. The cool air blower fan 13 is a cool air blower fan dedicated to the evaporator 12, and is disposed in the evaporator room of the evaporator 12.
Is supplied to the refrigerator compartment 2 and the vegetable compartment 3. Evaporator 1
Reference numeral 4 denotes a freezer-side refrigerating cycle evaporator, which is arranged on the rear side of the variable temperature chamber 4 and the freezer chambers 5 and 6. The cool air blower fan 15 is a cool air blower fan dedicated to the evaporator 14, is disposed in a ventilation path of the evaporator 14, and supplies cool air from the evaporator 12 to the variable temperature chamber 4 and the upper and lower freezing chambers 5 and 6. . Refrigerant is supplied to each of the evaporators 12 and 14 by the compressor 16, and a cooling operation is performed by forming respective evaporator cycles.

The variable temperature chamber 4 is an independent storage room that can be adjusted to a wide temperature range from freezing to refrigeration. A door 9 is opened and closed in a pull-out manner, and a container 20 is attached to the door 9. The variable temperature chamber 4 includes a cool air inlet 21, a cool air return port 22, a temperature sensor 23, a damper 24, a temperature assurance heater 25, and a cool air stirring fan 26.

A dedicated cool air introduction port 21 and a return port 22 which form an introduction path communicating with the evaporator 14 are formed above and below the back surface of the variable temperature chamber 4, and introduce cool air from the evaporator 14 through the cool air introduction port 21. Then, the air in the variable temperature chamber 4 is returned to the cold air return port 2.
2 to return to the evaporator 14. Damper 24
Is disposed in a passage between the cool air blower fan 15 and the cool air inlet 21 and is controlled to open and close by a control device (not shown) of the refrigerator, and controls cool air introduced from the cool air inlet 21 into the variable temperature chamber 4. It is. The control device has control means for controlling each device of the refrigerator.

The temperature sensor 23 detects the temperature of the variable temperature chamber 4. The temperature sensor 23 is an infrared sensor in the present embodiment, and is disposed on the ceiling surface of the variable temperature chamber 4 and irradiates infrared rays downward to detect the temperature of foods and the like stored in the variable temperature chamber 4. By doing
The temperature of the variable temperature chamber 4 is detected. Note that the temperature sensor 23 may be a temperature thermistor or the like arranged near the cool air return port 22 so as to detect the air temperature in the variable temperature chamber 4. The temperature assurance heater 25 is for adjusting the temperature in the variable temperature chamber 4 by controlling the energization thereof, and is disposed at the bottom of the variable temperature chamber 4. Since the temperature can be finely controlled by monitoring the room temperature with the temperature sensor 23, the temperature can be adjusted to any temperature in a wide range from freezing to refrigeration.

The cool air stirring fan 26 constitutes an in-compartment fan for forcibly applying air having a high flow velocity to foods and the like stored in the vegetable compartment 3. Located at the top inside. By operating the cool air stirring fan 26, the cool air in the variable temperature chamber 4 is stirred, and the temperature unevenness in the variable temperature chamber 4 can be improved. Cooling can be performed while maintaining good quality. And
Since the agitated cold air directly hits the stored food or the like and the heat transfer coefficient is improved, the temperature of the food or the like can quickly reach the temperature in the variable temperature chamber 4.

The variable temperature chamber 4 configured as described above
Based on operation commands such as set temperature, rapid cooling (rapid freezing or rapid refrigeration), and rapid thawing, the damper 24, the temperature assurance heater 25, the stirring fan 26, the compressor 16, the cold air blower fan 15, etc. By controlling, a normal cooling operation, a normal thawing operation, a rapid cooling operation, a rapid thawing operation, and the like are performed, and the temperature can be adjusted in a wide temperature range from freezing to refrigeration. The control command can be arbitrarily set by the user using a push button on an operation panel (not shown) provided on the front surface of the door 7.

Next, a modification of the variable temperature chamber 4 will be described with reference to FIG. FIG. 4 is a cross-sectional view of a modification of the variable temperature chamber portion of FIG.

This modified example is different from that shown in FIG. 3 in that a thawing heater 27 is disposed near the stirring fan 26 in the variable temperature chamber 4, and in other respects, it is different from FIG. It is basically the same as the three.

In this modification, the air heated by the thawing heater 27 can be agitated by the agitating fan 26 by supplying power to the thawing heater 27 during the rapid thawing operation. Faster rapid thawing is possible.

Next, still another modification of the variable temperature chamber 4 will be described with reference to FIG. FIG. 5 is a sectional view of still another modification of the variable temperature chamber portion in FIG.

In this modification, a cool air stirring fan 26
And a partition plate extending downwardly from the rear of the cooling air agitating fan 26 and the air intake 2 in the variable temperature chamber 4.
8, at the point where the cool air passage 29 and the outlet 30 are provided.
3 and is basically the same as that of FIG. 3 in other points.

In this modification, the air in the variable temperature chamber 4 reaches the cool air stirring fan 26 from the air intake 28 through the cool air passage 29, and is blown out from the outlet 30 toward the stored food. It corresponds to stored foods. Further, since the discharge port 30 and the intake port 28 are separated, the air in the variable temperature chamber 4 circulates without performing a short circuit. This enables efficient rapid cooling or rapid thawing.

Next, the control operation of the rapid cooling and rapid thawing of the refrigerator will be described with reference to the flowcharts of FIGS. The rapid cooling includes rapid freezing or rapid refrigeration.

First, the control operation of the rapid cooling operation will be described with reference to FIG. FIG. 6 is a flowchart showing an operation control example of rapid cooling of the variable temperature chamber of FIG.

When the rapid cooling operation is started based on the rapid cooling command, the compressor 16 is forcibly operated (step 1).
01), the cool air stirring fan 26 is turned on (step 10).
2) Forcibly open the damper 24 (step 103).
Thereby, the damper 24 is opened, low-temperature cold air is introduced from the evaporator 14 into the variable temperature chamber 4, and cooling of the stored food by forced ventilation of the cool air stirring fan 26 can be promoted. That is, in addition to the normal cooling operation,
Since the cool air stirring fan 26 is turned on, cooling of the food stored by forced ventilation can be promoted. This operation is continued for a predetermined time (step 104). When the predetermined time elapses, it is determined whether the temperature detected by the temperature sensor 23 is lower than the rapid cooling end temperature (step 105).

If it is determined in step 105 that the sensor temperature is not lower than the end temperature, the count-up of the extended operation is started (step 106). During the counting of the extension time, it is determined whether the temperature detected by the temperature sensor 23 is higher than the set temperature of the damper 24 (step 107). If not, the damper 24 is closed (step 108). In this case, the damper 24 is opened (Step 109), and these operations are continued for a predetermined time until the end of the extension time count-up. After the elapse of the predetermined time, the process returns to step 105 and is repeated until the sensor temperature becomes lower than the rapid cooling operation end temperature. In this way, during the extended operation in which the sensor temperature reaches the end temperature by opening and closing the damper 24, the damper 24 is closed by the sensor temperature. When the temperature is in the temperature range of refrigeration and slight freezing, freezing can be prevented.

In step 105, when the rapid cooling operation proceeds and the temperature in the variable temperature chamber 4 decreases and the temperature detected by the temperature sensor 23 decreases to become lower than the rapid cooling end temperature, the damper is closed ( (Step 110), the cool air stirring fan 26 is turned off (Step 111), and the rapid cooling operation ends.

Next, different control operations of the rapid cooling operation will be described with reference to FIG. FIG. 7 is a flowchart showing another example of a control operation of rapid cooling in the variable temperature chamber of FIG.

When the rapid cooling operation is started based on the rapid cooling command, the compressor 16 is forcibly operated (step 2).
01), the cool air stirring fan 26 is turned on (step 20).
2) The sensor set value is shifted to the low temperature side (step 203). As a result, the damper 24 opens and the evaporator 1
The low-temperature cold air is introduced into the variable temperature chamber 4 from 4, and the cooling of the stored food can be promoted by the forced ventilation of the cool-air stirring fan 26. That is, since the cold air stirring fan 26 is turned on in addition to the normal cooling operation, the cooling of the food stored by forced ventilation can be promoted. Since the sensor set temperature is shifted to a low temperature to operate the cool air stirring fan 26, faster rapid cooling can be performed.

With the sensor set value shifted to a lower temperature, the rapid cooling operation time count-up is started (step 204). During the counting of the rapid cooling operation time, the temperature detected by the temperature sensor 23 is changed to the damper 24.
It is determined whether the temperature is higher than the open set temperature (step 205). If the temperature is not higher, the damper 24 is closed (step 206). If the temperature is higher, the damper 24 is opened (step 207). It continues for a predetermined time until the time count-up ends. When the predetermined time has elapsed, the process proceeds to step 208.

In step 208, the temperature sensor 2
3 to determine whether the detected temperature is lower than the rapid cooling end temperature,
If the sensor temperature is not lower than the end temperature, the time count-up of the extended operation is started (step 209).
During the counting of the extension time, it is determined whether or not the temperature detected by the temperature sensor 23 is higher than the set temperature of the damper 24 (step 210). If not, the damper 24 is closed (step 211) and the temperature is high. In this case, the damper 24 is opened (step 212), and these operations are continued for a predetermined time until the end of the extension time count-up. After the elapse of the predetermined time, the process returns to step 208 and is repeated until the sensor temperature becomes lower than the rapid cooling end temperature.

In step 208, when the rapid cooling operation proceeds and the temperature in the variable temperature chamber 4 decreases, and the temperature detected by the temperature sensor 23 decreases to become lower than the rapid cooling end temperature, the sensor set value shift is performed. (Step 2
13) Turn off the cool air stirring fan 26 (step 21)
4) Terminate the rapid cooling operation.

Next, different control operations of the quick thawing operation will be described with reference to FIG. FIG. 8 is a flowchart illustrating an example of a control operation of rapid thawing in the variable temperature chamber of FIG.

When the quick thawing operation is started based on the quick thawing command, the cool air stirring fan 26 is turned on (step 301), and the sensor set value is shifted to the high temperature side (step 302). Then, as described below, the temperature assurance heater 2 is controlled by the set temperature shifted to the high temperature side.
5, ON / OFF of heater 27 for thawing, damper 24
The open / close operation is controlled to perform a quick thawing operation.

With the above-mentioned sensor set value shifted to a high temperature, a rapid thawing operation time count-up is started (step 303). During the counting of the quick thawing operation time, it is determined whether or not the detected temperature of the temperature sensor 23 is higher than the set temperature of the damper 24 (step 304). It is determined whether the temperature is higher than the ON set temperature of the thawing heater 27 (step 30).
5). If it is not high, the damper 24 is closed and the thawing heater 27 is turned on (step 30).
6) If it is higher, the damper 24 is closed and the thawing heater 27 is turned off (step 307).
Return to 03. If it is determined in step 304 that the temperature is high, the damper 24 is opened and the defrosting heater 27 is turned off (step 308), and the process returns to step 303. These operations are continued for a predetermined time until the end of the rapid thawing operation time count-up. When this predetermined time has elapsed (step 3
03), and proceed to step 309.

In step 309, the temperature sensor 2
Judge whether the detected temperature of 3 is higher than the quick thawing end temperature,
If the sensor temperature is not higher than the end temperature, the count-up of the rapid thawing extension operation time is started (step 31).
0). During the counting of the extension time, it is determined whether the detected temperature of the temperature sensor 23 is higher than the set temperature of the damper 24 (step 311). If not, the detected temperature of the temperature sensor 23 is further lowered. It is determined whether the temperature is higher than the ON set temperature of the thawing heater 27 (step 312). If it is not high, the damper 24 is closed and the thawing heater 2 is closed.
7 is turned on (step 313).
4 is closed and the thawing heater 27 is turned off (step 314), and the process returns to step 310. Step 311
If it is determined high, the damper 24 is opened and the thawing heater 27 is turned off (step 315), and the process returns to step 310. These operations are continued for a predetermined time until the end of the rapid thawing operation time count-up. When the predetermined time has elapsed (step 310), the process returns to step 309.

When the rapid thawing operation proceeds and the temperature in the variable temperature chamber 4 decreases, and the temperature detected by the temperature sensor 23 decreases and becomes higher than the rapid thawing end temperature, the sensor set value shift is released. Then, the cooling air stirring fan 26 is turned off (step 317), and the rapid cooling operation is ended.

In the rapid cooling and thawing operation, the cooling air agitation fan 26 is turned on, so that thawing can be promoted by forced ventilation. When the thawing progresses, the temperature of the temperature sensor 23 rises, and when the temperature becomes higher than the quick thawing end temperature, the shift of the sensor set value is released, the cool air stirring fan 26 is turned off, and the quick thawing operation is ended. When the sensor temperature is lower than the end temperature, the operation is extended, and the extended rapid thawing operation is continued, so that quick thawing can be performed reliably. By such control, quick thawing can be performed without increasing the temperature of the food in the refrigerator compartment 2, the vegetable compartment 3, and the freezer compartments 5 and 6.

In the embodiment of the present invention, an independent variable temperature chamber 4 that can be adjusted to a wide temperature range from freezing to refrigeration, and a cool air blower fan 15 that supplies cool air from an evaporator 14 to the variable temperature chamber 4. And an inlet 21 for introducing cool air into the variable temperature chamber 4, and a damper 2 provided in the inlet 21.
4 and a temperature sensor 23 for detecting the temperature of the variable temperature chamber 4
A cooling air agitating fan 26 for agitating or circulating the air in the variable temperature chamber 4 and a control device for controlling each device of the refrigerator, and operating the cold air agitating fan 26 based on a command such as rapid cooling or rapid thawing. And a control device having control means for controlling the opening and closing of the damper. As a result, the operation of rapid cooling or rapid thawing in the variable temperature chamber can be performed without affecting the food in other storage rooms, and the food and the like charged into the variable temperature chamber 4 can be uniformly and speeded up. A refrigerator that can be cooled or thawed and has good usability can be obtained.

A thawing heater 27 is provided in a cooling air stirring path or a circulation path of the cooling air stirring fan 26, and a control means is configured to control the energization of the thawing heater 27 based on a quick thawing command. . Thereby, the air temperature in the refrigerator can be heated by the thawing heater 27 at the time of quick thawing, so that the time for quick thawing can be further reduced.

Further, a cool air stirring fan 26 is disposed above the variable temperature chamber 4 so that room air is directly blown from the cool air stirring fan 26 toward the stored food. Thereby, the air discharged from the cool air stirring fan 26 can be efficiently stirred, so that the speed of cooling or thawing can be increased.

The control means is configured to forcibly open the damper 24 for a predetermined time and to operate the cool air stirring fan 26 based on the rapid cooling command. Thereby, the cool air can be stirred while directly taking in the cool air from the evaporator 14, so that the speed of rapid cooling, that is, rapid freezing or rapid refrigeration can be increased.

Further, based on the rapid cooling command, the set temperature of the temperature sensor 23 is shifted to a low temperature for a predetermined time, and the cool air stirring fan 26 is operated until the temperature of the variable temperature chamber 4 reaches the low set temperature. It constitutes control means. As a result, the surface of the object to be rapidly cooled is sufficiently cooled but the inside is not cooled,
Since the cooling operation is continued while the set value is shifted, rapid cooling, that is, rapid freezing or rapid refrigeration can be speeded up.

Further, based on the quick thawing instruction, the set temperature of the temperature sensor 23 is shifted to a high temperature for a predetermined time, and the cool air stirring fan 26 is operated until the temperature of the variable temperature chamber 4 reaches the high set temperature. It constitutes control means. As a result, the surface of the object to be rapidly defrosted is sufficiently defrosted, but the defrosting operation is continued during the time when the set value is shifted even when the inside is not defrosted,
The speed of rapid thawing can be increased.

Further, the food stored in the variable temperature chamber 4 is
After the damper 24 is forcibly opened for a predetermined period of time and the cool air stirring fan 26 is operated based on a command to make the temperature of the refrigerator 5 ° C. to -12 ° C., the cool air stirring fan 26 is operated until the stored food reaches the set temperature. The control means is configured to operate the. Thus, even when the food is weakly frozen, most of the food at -1 ° C. to −5 ° C. quickly passes through a temperature zone where the moisture changes to ice crystals, and the food can be prevented from being deteriorated due to slow freezing. Further, after the food is frozen, the temperature is maintained at a low freezing temperature, so that the thawing time for cooking can be shortened.

Further, based on the rapid cooling command, the compressor 16 constituting the refrigeration cycle together with the evaporator 14 is forcibly operated at a high speed for a predetermined time, and the cool air blowing fan 1 is operated.
5 is configured to operate. In this way, the cool air from the evaporator 14 is taken into the variable temperature chamber 4 so that the operation time of the rapid cooling can be reduced.

In addition, a plurality of evaporators 14,
12 and the variable temperature chamber 4 based on the rapid cooling command.
The control means is configured to forcibly perform the operation of the evaporator cycle for supplying cool air to the evaporator for a predetermined time. Therefore, by taking cool air from the evaporator 14 in operation into the variable temperature chamber 4, the operation time of rapid cooling can be shortened.

Further, the control means is constituted so that the predetermined time of the operation performed based on the command of the quick cooling or the quick thawing is varied according to the final target temperature. This allows
It is possible to prevent the target food from being overcooled or overthawed, and to minimize the freezing and temperature rise of other stored foods.

Further, an infrared sensor is provided for the means for detecting the temperature of the air in the variable temperature chamber 4 or the stored food. As a result, the temperature of the target object can be directly sensed, so that fine control can be performed, and the cooling or thawing time can be reduced, and incomplete termination can be prevented.

[0050]

As described above, according to the present invention,
Rapid cooling or rapid thawing operation can be performed in the variable temperature room without affecting the food in other storage rooms, and the food or the like put into the variable temperature room is cooled or thawed uniformly and speeded up. It is possible to obtain a refrigerator that can be easily used.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view of a refrigerator according to one embodiment of the present invention.

FIG. 2 is a front view of the refrigerator of FIG.

FIG. 3 is an enlarged cross-sectional detailed view of a variable temperature chamber portion of the refrigerator of FIG. 1;

FIG. 4 is a cross-sectional view of a modification of the variable temperature chamber portion of FIG.

FIG. 5 is a sectional view of still another modification of the variable temperature chamber portion of FIG. 3;

FIG. 6 is a flowchart illustrating an operation control example of rapid cooling of the variable temperature chamber in FIG. 3;

FIG. 7 is a flowchart illustrating a different control operation example of rapid cooling in the variable temperature chamber of FIG. 3;

FIG. 8 is a flowchart illustrating an example of a control operation of quick thawing in the variable temperature chamber of FIG. 4;

[Description of Signs] 1 ... Refrigerator body, 2 ... Refrigerator room, 3 ... Vegetable room, 4 ... Variable temperature room, 5, 6 ... Freezer room, 7-11 ... Door, 12 ... Evaporator,
13 ... Cold air blower fan, 14 ... Evaporator, 15 ... Cold air blower fan, 16 ... Compressor, 21 ... Cool air inlet (introduction path),
22 ... Cool air return port, 23 ... Temperature sensor, 24 ... Damper, 25 ... Temperature assurance heater, 26 ... Cool air stirring fan (in-compartment fan), 27 ... Thaw heater, 28 ... Cold air intake, 29 ... Cold air passage, 30 … Cool air outlet.

Claims (10)

[Claims] 1. An independent variable temperature chamber that can be adjusted to a wide temperature range from freezing to refrigeration, a cool air blower fan for supplying cool air from an evaporator to the variable temperature chamber, and introducing cool air to the variable temperature chamber. The control unit controls an introduction path, a damper provided in the introduction path, a temperature sensor for detecting a temperature of the variable temperature chamber, an internal fan for stirring or circulating air in the variable temperature chamber, and a refrigerator. A refrigerator, comprising: a control device, wherein the control device has control means for controlling operation of the internal fan and opening and closing of the damper based on a command such as rapid cooling or quick thawing. 2. A refrigerator according to claim 1, wherein a defrosting heater is provided in a cooling air stirring path or a circulation path by said internal fan, and energization of said defrosting heater is controlled based on a quick defrosting command. A refrigerator comprising the control means. 3. The refrigerator according to claim 1, wherein an internal fan is arranged above the variable temperature chamber, and the indoor air is directly blown out from the internal fan toward the stored food. A refrigerator characterized by: 4. The refrigerator according to claim 1, wherein the control means is configured to forcibly open the damper for a predetermined time and to operate the internal fan based on a rapid cooling command. A refrigerator characterized by: 5. The refrigerator according to claim 1, wherein the set temperature of the temperature sensor is shifted to a low temperature for a predetermined time based on a command for rapid cooling, and the temperature of the variable temperature chamber is set to the low set temperature. Wherein the control means is configured to operate the internal fan until the temperature of the refrigerator is reached. 6. The refrigerator according to claim 1, wherein a set temperature of the temperature sensor is shifted to a high temperature for a predetermined time based on a command for quick thawing, and the temperature of the variable temperature chamber is set to the high set temperature. Wherein the control means is configured to operate the internal fan until the temperature of the refrigerator is reached. 7. The refrigerator according to claim 1, wherein the food stored in the variable temperature chamber is changed from -5.degree.
After the damper is forcibly opened for a predetermined period of time and the internal fan is operated based on the instruction to make the freezing at 2 ° C., the internal fan is operated until the stored food reaches the set temperature. Characterized in that the control means is configured as described above. 8. The refrigerator according to claim 1, wherein a compressor forming a refrigerating cycle together with the evaporator is forcibly operated at a high speed for a predetermined time based on an instruction for rapid cooling, and the cold air is cooled. A refrigerator, wherein the control means is configured to operate a blower fan. 9. The refrigerator according to claim 1, further comprising a plurality of evaporators in the refrigerating cycle, wherein a predetermined operation of the evaporator cycle for supplying cool air to the variable temperature chamber is performed based on a rapid cooling command. A refrigerator characterized in that the control means is configured to forcibly perform the operation for a time. 10. The refrigerator according to claim 4, wherein the control means is configured to vary a predetermined time of an operation performed based on a command of quick cooling or quick thawing according to a final target temperature. A refrigerator characterized by the following.