KR20070066836A - Method of controlling refrigerator - Google Patents

Abstract

A control method for a refrigerator is provided to control cooling of one storing chamber dependent on a cooling state of another storing chamber, thereby reducing continuous operation time and frequent re-initiation of a compressor generated in independent control of the one storing chamber, thereby improving compressor operation efficiency. In a control method for a refrigerator, a second fan is turned off to stop operation of a compressor in spite that a second set temperature is not satisfied with a temperature of a second storing chamber, if off conditions for a first fan are satisfied with a temperature of a first storing chamber reaching a first set temperature(406,408,412). The second fan is turned off when the temperature of the second storing chamber reaches a third temperature, which is lower than the second set temperature of the second storing chamber(418,416). The second storing chamber is a convertible chamber for both refrigerating and freezing modes. If the off conditions of the first fan is satisfied when the second storing chamber is converted from the refrigerating mode to the freezing mode, the second fan is turned off even though the set temperature of the freezing mode is not satisfied with the temperature of the second storing chamber(402,404). The second fan is turned on if on conditions of the first fan are satisfied when the first storing chamber is a freezing chamber and the first set temperature is not satisfied with the temperature of the first storing chamber, even though the second set temperature is satisfied with the temperature of the second storing chamber(420). The first fan is driven continuously for satisfying the first set temperature with the temperature of the first storing chamber, and the second fan is intermittently driven if the second set temperature is satisfied with the temperature of the second storing chamber(422).

Description

How to control your refrigerator {METHOD OF CONTROLLING REFRIGERATOR}

1 is a view showing a refrigerator having a plurality of storage rooms according to an embodiment of the present invention.

FIG. 2 is a view illustrating a configuration and a cooling cycle of a plurality of storage compartments of the refrigerator illustrated in FIG. 1. FIG.

3 is a view showing a control system of the refrigerator illustrated in FIGS. 1 and 2.

4 is a flowchart illustrating a control method of a refrigerator having a plurality of storage compartments according to an exemplary embodiment of the present invention.

* Description of the symbols for the main parts of the drawings *

F: Freezer compartment (first storage compartment) CF: Secondary freezer compartment (second compartment)

R: Refrigerator room (third storeroom) CR: Auxiliary refrigerator room (fourth storeroom)

100: refrigerator 102R: refrigerator compartment door

102CR: Auxiliary Refrigerator Door 102F: Freezer Door

102CF: auxiliary freezer door 202: compressor

204: condenser 206R: cold room evaporator

206CR: Auxiliary Refrigerator Evaporator 206F: Freezer Evaporator

206CF: Auxiliary Freezer Evaporator 208R: Fridge Fan

208CR: Secondary Refrigerator Fan 208F: Freezer Fan

208CF: Auxiliary Freezer Fan 214R: Fridge Temperature Sensor

214CR: Auxiliary Fridge Temperature Sensor 214F: Freezer Temperature Sensor

214CF: auxiliary freezer temperature sensor 302: control unit

304: ice detection unit 306: user input unit

308: Automatic Ice Maker

The present invention relates to a control method of a refrigerator, and more particularly, to a control method of a refrigerator having a plurality of evaporators.

The refrigerator reduces the temperature inside the storage compartment through a cooling cycle in which the refrigerant is compressed, condensed, expanded, and evaporated, allowing food to be kept fresh at low temperatures for a long time.

The basic configuration of the refrigerator includes a compressor that compresses a low temperature / low pressure gas refrigerant to a high temperature / high pressure gas refrigerant, a condenser that condenses the refrigerant discharged from the compressor by exchanging heat with air outside the refrigerator, An expansion device for reducing the pressure of the refrigerant, and an evaporator for evaporating the reduced pressure of the refrigerant in the expansion device to exchange heat with the air in the storage compartment to take heat inside the storage compartment. In addition, a fan for circulating cold air is provided in each storage compartment. When a plurality of storage compartments are provided in the refrigerator, a cooling temperature desired by a user is set for each storage compartment, and the compressor and the fan are operated to maintain the internal temperature of each storage compartment at the set temperature.

However, if the current temperature of each storage room is not the same, and the set temperature of each storage room is also different from each other, the time point at which the temperature of each storage room reaches the set temperature may also be different. The compressor will not operate until all of the storage compartment temperatures have reached their set temperature.The temperatures at which all storage compartments reach their respective set temperatures may be different and the temperature of the storage compartments that have already reached the set temperature will rise again. Cooling may be required again, increasing the continuous operation time of the compressor or frequently restarting the off-state compressor, which causes a decrease in the operating efficiency of the compressor.

The control method of the refrigerator according to the present invention has an object of increasing the compressor operating efficiency by reducing the continuous operation time of the compressor or the frequent restart of the compressor in the refrigerator having a plurality of storage compartments.

According to an embodiment of the present disclosure, a control method of a refrigerator includes a compressor, a first storage compartment having a first fan for circulation of cold air and having a large load, and a second fan for circulation of cold air, and having a relatively relatively greater than that of the first storage compartment. In the control method of the refrigerator provided with the 2nd storage compartment with a small load, When the temperature of a 1st storage compartment satisfies the target 1st set temperature and satisfy | fills the off condition of a 1st fan, the temperature of a 2nd storage compartment is a 2nd target object. Even if the set temperature is not satisfied, the second fan is turned off to stop the compressor.

In addition, the above-described second fan includes a third set temperature lower than the second set temperature of the second storage chamber as an off condition; When the temperature of the second storage compartment reaches the third set temperature and satisfies the off condition of the second fan, the second fan is turned off.

In addition, the above-described second storage chamber is a conversion chamber capable of mutually switching between the refrigeration mode and the freezing mode; When the operation mode of the second storage compartment is switched from the refrigeration mode to the freezing mode, if the first fan is in an off condition, the second fan is turned off even when the temperature of the second storage compartment does not satisfy the set temperature of the freezing mode.

In addition, the above-mentioned first storage chamber is a freezing chamber; If the temperature of the first storage compartment does not satisfy the first set temperature, and the first fan is on, the second fan is turned on even if the temperature of the second storage compartment satisfies the second set temperature.

Further, the first fan is continuously operated so that the temperature of the above-described first storage chamber satisfies the first set temperature; In a state where the temperature of the second storage compartment satisfies the second set temperature, the second fan is intermittently operated.

The control method of the refrigerator to turn off the second fan when the operation mode of the first storage compartment is the power refrigeration mode.

According to another aspect of the present invention, a control method of a refrigerator includes a compressor, a freezer compartment in which a first fan for cold air circulation is provided, a second fan for cold air circulation, and converts a freezer mode and a refrigeration mode to each other. A control method of a refrigerator having a conversion chamber, wherein the temperature of the conversion chamber does not satisfy the set temperature of the freezing mode if the first fan is turned off when the operation mode of the conversion chamber is changed from the refrigeration mode to the freezing mode. Turn off the second fan even in a state; Turning on the second fan of the conversion chamber when the operation mode of the freezer compartment is the normal freezing mode when the temperature of the conversion chamber does not satisfy the second set temperature; If the operation mode of the freezer compartment is the power refrigeration mode when the temperature of the conversion chamber satisfies the second set temperature, the second fan of the conversion chamber is turned off.

In addition, the on / off control of the 2nd fan mentioned above is performed when switching the operation mode of a conversion chamber from a refrigeration mode to a freezing mode.

In addition, the aforementioned freezer compartment further includes an automatic ice maker for producing ice; The method further includes turning on the automatic ice maker when the operation mode of the freezer is the power freezing mode.

According to another aspect of the present invention, there is provided a control method of a refrigerator, including a freezer compartment having a compressor, a first fan for cold air circulation, and an automatic ice maker for manufacturing ice, and a second fan for cold air circulation. A control method of a refrigerator having a conversion chamber capable of mutually switching between a mode and a refrigeration mode, wherein the temperature of the conversion chamber is frozen if the first fan is turned off when the operation mode of the conversion chamber is changed from the refrigeration mode to the freezing mode. Turning off the second fan even when the set temperature of the mode is not satisfied; If the operation mode of the conversion chamber is changed from the refrigerating mode to the freezing mode and the automatic ice maker of the freezing chamber is on, the second fan of the conversion chamber is turned off.

In addition, if the temperature of the above-mentioned freezer compartment satisfies the desired first set temperature and the first fan is turned off and the automatic ice maker of the freezer compartment is in full ice and no further ice production is required, the conversion chamber does not meet the second set temperature. If not, further includes turning off the second fan of the conversion chamber.

In addition, the above-described second fan has a third set temperature lower than the second set temperature of the conversion chamber as the off condition; When the temperature of the second storage compartment reaches the third set temperature and satisfies the off condition of the second fan, the second fan is turned off.

According to another aspect of the present invention, a control method of a refrigerator includes a compressor, a first fan for circulating cold air, a first storage compartment having a large load, and a second fan for circulating cold air, A control method of a refrigerator having a second storage compartment having a relatively small load, wherein the temperature of the second storage compartment is equal to the target temperature when the temperature of the first storage compartment satisfies the target first set temperature and the OFF condition of the first fan is satisfied. Turning off the second fan even when the second set temperature is not satisfied; The first fan is continuously operated so that the temperature of the first storage compartment satisfies the first set temperature, and the second fan is intermittently operated when the temperature of the second storage compartment satisfies the second preset temperature.

In addition, the intermittent operation of the second fan described above is performed until the temperature of the first storage chamber satisfies the first set temperature.

Referring to Figures 1 to 4 a preferred embodiment of the present invention made as described above are as follows. 1 is a view showing a refrigerator having a plurality of storage compartments according to an embodiment of the present invention. The refrigerator 100 shown in FIG. 1 includes four independent storage compartments R, CR, F, and CF, and each storage compartment is opened and closed by doors 102R, 102CR, 102F, and 102CF, which are provided separately for each storage compartment. do. In the present invention, the number of storage compartments is not limited to four, but may be applied to all refrigerators in which at least one storage compartment is additionally provided in addition to the freezer compartment and the refrigerating compartment.

FIG. 2 is a view illustrating a configuration and a cooling cycle of a plurality of storage compartments of the refrigerator illustrated in FIG. 1. As shown in FIG. 2, four refrigerators R, CR, F, and CF are all provided in the refrigerator according to the embodiment of the present invention, and each of the storage compartments is a freezer compartment F and a second storage compartment. It may be classified into an auxiliary freezer compartment CF, a refrigerating compartment R that is a third storage compartment, and an auxiliary refrigerating compartment CR that is a fourth storage compartment. If the refrigerator of FIG. 2 includes only the freezer compartment F, the auxiliary freezer compartment CF, and the refrigerating compartment R except the auxiliary refrigerator compartment CR, the freezer compartment F is the first storage compartment, and the auxiliary freezer compartment CF is As the second storage compartment, the refrigerating compartment R may be divided into a third storage compartment. In particular, the auxiliary freezing chamber CF is a conversion chamber capable of converting the operation mode into one of the refrigerating mode and the freezing mode, and the cooling capacity, that is, the load is relatively smaller than the freezing compartment F.

These four storage rooms (R, CR, F, CF) have evaporators (206R, 206CR, 206F, 206CF), fans (208R, 208CR, 208F, 208CF), defrost heaters (210R, 210CR, 210F, 210CF), defrost sensors. 212R, 212CR, 212F, and 212CF, and storage room temperature sensors 214R, 214CR, 214F, and 214CF are respectively provided. Evaporators 206R, 206CR, 206F, 206CF and fans 208R, 208CR, 208F, 208CF are for air circulation in each storage chamber R, CR, F, CF. Defrost heaters 210R, 210CR, 210F and 210CF are for defrosting surfaces of evaporators 206R, 206CR, 206F and 206CF, and defrost sensors 212R, 212CR, 212F and 212CF are used for defrost heaters 210R and 210CR during defrost operation. , 210F, 210CF are used to detect the surface temperature of the evaporators 206R, 206CR, 206F, 206CF. The storage temperature sensors 214R, 214CR, 214F, and 214CF are for detecting the temperature inside each storage chamber R, CR, F, CF. In the case of the fans 208R, 208CR, 208F, and 208CF, if the refrigerator of FIG. 2 includes only the freezer compartment F, the auxiliary freezer compartment CF, and the refrigerating compartment R, except the auxiliary refrigerator compartment CR, the freezer compartment fan ( 208F may be classified as a first fan, the auxiliary freezer compartment 208CF may be a second fan, and the refrigerating compartment fan 208R may be classified as a third fan.

Of the four storage compartments (R, CR, F, CF) provided in the refrigerator according to an embodiment of the present invention, the refrigerating compartment (R) and the freezing compartment (F) are the refrigerating and freezing of food, which is a function of the refrigerator compartment and the freezer compartment of the conventional refrigerator, respectively. The auxiliary freezer compartment CF has an operation mode such as a refrigeration mode (COOL), a soft freezing mode (SOFT FREEZE), and a freezing mode (FREEZE). The set temperature of the refrigerating mode is 3 ° C, the set temperature of the soft freezer mode is -5 ° C, and the set temperature of the freezer mode is -15 ° C to -25 ° C. The freezing mode of the auxiliary freezer compartment CF has a cooling temperature that is almost similar to the normal operating mode of the freezer compartment F. According to an embodiment of the present invention, the set temperature of the freezer compartment F is divided into a first set temperature and the set temperature of the auxiliary freezer compartment by a second set temperature. Particularly, in the auxiliary freezer chamber CF, an off condition of the auxiliary freezer compartment fan 208CF. As a third set temperature is provided, the third set temperature is somewhat lower than the second set temperature, only the third set temperature as needed, even if the present temperature of the auxiliary freezer compartment CF does not reach the second set temperature. Even if it is satisfied, the auxiliary freezer compartment 208CF is for turning off.

ICE, one of the operation modes of the freezer compartment F, is a cooling mode for freezing water to make ice, and is maintained at a temperature below 0 ° C (for example, -25 ° C). This ice making mode can be activated (ICE ON) or deactivated (ICE OFF) through a user input unit (see FIG. 3), and ice making is performed when "ICE ON" and ice making is performed when "ICE OFF". I do not lose. In addition, in the power freezing mode (POWER FREEZE) of the freezer compartment F, the compressor 202 and the fan 208F are continuously operated for 2 hours and 30 minutes.

3 is a diagram illustrating a control system of the refrigerator illustrated in FIGS. 1 and 2. As shown in FIG. 3, on the input side of the control unit 302 which controls the overall operation of the refrigerator, the storage temperature sensors 214R, 214CR, 214F, and 214CF of each storage chamber R, CR, F, and CF, and the ice detector 304 ), The user input unit 306 is connected to each other, and the fan 208R, 208CR, 208F, 208CF, an automatic ice maker 308, and a compressor 202 are connected to the output side of the control unit 302. The control unit 302 receives the temperature information of the storage compartment from the storage temperature sensors 214R, 214CR, 214F, and 214CF to control the compressor 202 and the fans 208R, 208CR, 208F, and 208CF to perform cooling operation of the refrigerator. Conduct. The automatic ice maker 308 is provided in the freezer compartment F to automatically produce a certain amount of ice when in the ice making mode (ICE ON). Once a certain amount of ice is produced (frozen), no more ice is produced, even in ice making mode.

4 is a flowchart illustrating a control method of a refrigerator having a plurality of storage compartments according to an exemplary embodiment of the present invention, and minimizes the operation of the auxiliary freezer compartment fan 208CF when the auxiliary freezer compartment CF operates in the freezing mode FREEZE. As a result, a control method for reducing the number of continuous operations or restarts of the compressor 202 according to the operation of the auxiliary freezer compartment fan 208CF is illustrated.

As shown in FIG. 4, when the auxiliary freezing chamber CF is switched from the soft freezing mode (SOFT FREEZE) or the freezing mode (COOL) to the freezing mode (FREEZE) (YES in 402), the temperature of the auxiliary freezing chamber CF is increased. It is monitored whether the target set temperature (second set temperature) is reached (satisfied), and the on / off of the auxiliary freezer compartment fan 208CF is controlled according to whether the temperature of the auxiliary freezer compartment CF satisfies the desired set temperature.

In the case of block 406, the auxiliary freezer compartment 208CF is turned off 408 if the temperature of the auxiliary freezer compartment CF approaches the set temperature (YES at 406) when the freezer compartment 408F is turned off. On the contrary, even if the freezer compartment fan 208F is in the off condition, if the temperature of the auxiliary freezer compartment CF does not significantly reach the set temperature (NO in 406), the auxiliary freezer compartment fan 208CF is kept on (410). If the freezer fan 208F is turned off, the compressor 202 may also be turned off, but the compressor 202 may not be turned off due to the operation of the auxiliary freezer fan 208CF. In addition to increasing the continuous operation time of, the operation condition of the freezer compartment fan 208F again when the off condition of the auxiliary freezer compartment 208CF is reached again, so that the continuous operation time or the number of restarts of the compressor 202 is further increased. do. Therefore, as shown in blocks 406 and 408 of FIG. 4, if the freezer fan 208F is in an off condition, even if the temperature of the auxiliary freezer chamber CF is not close to the set temperature, it is very close to the set temperature (for example, When the set temperature is 25 ° C., when the current temperature is about 23 ° C.), the compressor 202 is operated by the independent operation of the auxiliary freezer fan 208CF alone while the auxiliary freezer fan 208CF is turned off. Do not increase the continuous operation time or the number of restarts. This is a continuous operation of the compressor 202 by giving priority to stopping the operation of the compressor 202 when the difference between the current temperature and the set temperature is small even though the actual temperature of the auxiliary freezer chamber CF does not reach the set temperature. Try to lower your time or restart count. The difference between the current temperature and the set temperature for forcibly turning off the auxiliary freezer compartment fan 208CF is large for the cooling operation required in the auxiliary freezer compartment CF even if the temperature of the auxiliary freezer compartment CF does not completely satisfy the set temperature. It is desirable to determine to such an extent that it does not affect.

In the case of block 412, when the freezer fan 208F is in the off condition, and the freezer F is not in ice making mode or ICE OFF or in ice making mode, the ice making is all completed and the ice is already in the freezer F ), The auxiliary freezer compartment fan 208CF is forcibly turned off (408) when no further deicing mode operation is required (YES at 412). In this case, since the cooling of the freezer compartment F is not necessary, the auxiliary freezer compartment fan 208CF is also turned off so that further operation of the compressor 202 by the sole operation of the auxiliary freezer compartment 208CF does not occur. In other words, the continuous operation time or the number of restarts of the compressor 202 are reduced.

In the case of block 414, the auxiliary freezer fan because the freezer F operates continuously at -25 ° C when the freezer F is in ice mode (ICE ON) and the ice is in progress because it is not full ice (YES at 414). 208CF only turns on / off selectively depending on whether cooling is required in the auxiliary freezer compartment CF, but need not be forced off (416). This is because it is not necessary to forcibly turn off the auxiliary freezer compartment fan 208CF when the compressor 202 has to be operated to cool the freezer compartment F. On the contrary, even in the ice making mode (ICE OFF) or in the ice making mode (No at 414), the auxiliary freezer compartment fan 208CF is turned on so that the temperature of the auxiliary freezer compartment CF reaches the set temperature. 410.

In the case of block 418, the freezer compartment F is in the power freezing mode and the auxiliary freezer compartment fan 208CF is turned off when it is continuously operated for a long time (e.g., 2 hours and 30 minutes) which is basically set (Yes of 418) ( 416). On the contrary, when the freezer compartment F is not in the power freezing mode (NO in 418), the auxiliary freezer compartment fan 208CF is continuously turned on to allow the temperature of the auxiliary freezer compartment CF to reach the set temperature (410).

In the case of blocks 420 to 422, regardless of whether the temperature of the auxiliary freezer compartment CF satisfies the desired set temperature, the temperature of the freezer compartment F does not satisfy the target set temperature (first set temperature) (420). YES), if the freezer compartment fan 208F is turned on, the auxiliary freezer compartment fan 208CF is turned on even if the temperature of the auxiliary freezer compartment CF satisfies the set temperature.

However, until the temperature of the freezer compartment F reaches the desired set temperature, the freezer compartment fan 208F is continuously operated and the auxiliary freezer compartment fan 208CF performs the intermittent operation of repeatedly turning on and off. If the temperature of the freezer compartment F does not satisfy the set temperature, the compressor 202 must continue to operate, and thus, the subsidiary freezer compartment 208CF is intermittently operated to contribute to the freezer mode operation of the current auxiliary freezer compartment CF. .

According to the present invention, a refrigerator having a plurality of storage compartments controls the cooling control of some storage compartments depending on the cooling state of the other storage compartments so that the continuous operation time of the compressor or frequent restarting of the compressors may occur when the other storage compartments are independently controlled. Reducing the efficiency of compressor operation.

Claims (14)

Control of a refrigerator having a compressor, a first storage compartment having a first fan for cold air circulation and having a high load, and a second storage compartment having a second fan for cold air circulation and having a smaller load than the first storage compartment. In the method, When the temperature of the first storage compartment satisfies the first predetermined temperature and satisfies the off condition of the first fan, the second fan is operated even when the temperature of the second storage compartment does not satisfy the desired second predetermined temperature. The control method of the refrigerator which turns off and stops the said compressor. The method of claim 1, The second fan has a third set temperature lower than a second set temperature of the second storage compartment as an off condition; And the second fan is turned off when the temperature of the second storage compartment reaches the third set temperature and satisfies the off condition of the second fan. The method of claim 2, The second storage chamber is a conversion chamber capable of converting between a refrigeration mode and a freezing mode; If the first fan is turned off when the operation mode of the second storage compartment is changed from the cold storage mode to the freezing mode, the second fan even when the temperature of the second storage compartment does not satisfy the set temperature of the freezing mode. The control method of the refrigerator to turn off. The method of claim 2 or 3, The first storage compartment is a freezing compartment; A control of the refrigerator to turn on the second fan even if the temperature of the second storage compartment satisfies the second setting temperature if the first fan is on when the temperature of the first storage compartment does not satisfy the first set temperature; Way. The method of claim 4, wherein Continuously operating the first fan so that the temperature of the first storage compartment satisfies the first set temperature; And controlling the second fan to intermittently operate when the temperature of the second storage compartment satisfies the second set temperature.  The method of claim 1, wherein The control method of the refrigerator to turn off the second fan when the operation mode of the first storage compartment is the power refrigeration mode. A control method of a refrigerator comprising a compressor, a freezing compartment in which a first fan for cold air circulation is provided, and a conversion chamber in which a second fan for cold air circulation is provided and which can switch between a freezing mode and a refrigeration mode. If the first fan is turned off when the operation mode of the conversion chamber is changed from the cold storage mode to the freezing mode, the second fan is turned off even when the temperature of the conversion chamber does not satisfy the set temperature of the freezing mode. To; Turning on the second fan of the conversion chamber when the operation mode of the freezing compartment is the normal freezing mode when the temperature of the conversion chamber does not satisfy the second set temperature; And when the operation mode of the freezer compartment is the power freezing mode when the temperature of the conversion chamber satisfies the second set temperature, turning off the second fan of the conversion chamber. The method of claim 7, wherein The control method of the refrigerator of the second fan is performed when the operation mode of the conversion chamber is converted from the refrigeration mode to the freezing mode. The method according to claim 7 and 8, The freezer further comprises an automatic ice maker for producing ice; And turning on the automatic ice maker when the operation mode of the freezer is the power freezing mode. And a freezing compartment provided with a compressor, a first fan for cold air circulation, and an automatic ice maker for manufacturing ice, and a conversion chamber provided with a second fan for cold air circulation and capable of converting between a freezing mode and a refrigeration mode. In the control method of the refrigerator, If the first fan is turned off when the operation mode of the conversion chamber is changed from the cold storage mode to the freezing mode, the second fan is turned off even when the temperature of the conversion chamber does not satisfy the set temperature of the freezing mode. To; And controlling the second fan of the conversion chamber when the operation mode of the conversion chamber is changed from the refrigerating mode to the freezing mode and the automatic ice maker of the freezing chamber is turned on. The method of claim 10, The conversion chamber satisfies the second set temperature if the temperature of the freezer compartment satisfies the desired first set temperature and the first fan is turned off and the automatic ice maker of the freezer compartment is in full ice and no further ice production is required. If not, further comprising the step of turning off the second fan of the conversion chamber. The method of claim 11, The second fan has a third set temperature lower than a second set temperature of the conversion chamber as an off condition; And the second fan is turned off when the temperature of the second storage compartment reaches the third set temperature and satisfies the off condition of the second fan. Control of a refrigerator having a compressor, a first storage compartment having a first fan for cold air circulation and having a high load, and a second storage compartment having a second fan for cold air circulation and having a smaller load than the first storage compartment. In the method, When the temperature of the first storage compartment satisfies the first predetermined temperature and satisfies the off condition of the first fan, the second fan is operated even when the temperature of the second storage compartment does not satisfy the desired second predetermined temperature. Off; A refrigerator operating the first fan continuously so that the temperature of the first storage compartment satisfies the first set temperature, and intermittently operating the second fan when the temperature of the second storage compartment satisfies the second preset temperature. Control method. The method of claim 13, The intermittent operation of the second fan is controlled until the temperature of the first storage compartment satisfies the first set temperature.

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