KR102157544B1 - Refrigerator - Google Patents

Abstract

A compression unit including a first compressor and a second compressor connected in parallel with refrigerant flow paths; A condenser for condensing the refrigerant compressed in the compression unit; A first evaporator for cooling the first storage chamber; A second evaporator having a first evaporator and a refrigerant flow path connected in parallel and cooling a second storage chamber; A first expansion mechanism disposed between the first evaporator and the condenser; It includes a second expansion mechanism disposed between the second evaporator and the condenser, and the compression unit has an ambient temperature above an external set temperature, or at least one of the first and second storage chambers is overloaded, or the first and second storage chambers are in a refrigeration mode. In this case, the first compressor and the second compressor are operated, otherwise, the first compressor is operated and the second compressor is deactivated, so that the efficiency reduction in the kimchi storage mode, which is the main operation mode, can be prevented, and power consumption will be improved. There is an advantage to be able to.

Description

Kimchi refrigerator{Refrigerator}

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

In general, a kimchi refrigerator is a refrigerator made to store kimchi, and can be manufactured and controlled so that it can be stored for a long time at the most suitable temperature to preserve the fresh taste of kimchi.

It is preferable that the kimchi refrigerator is stable and does not have a large temperature change during storage, and that the kimchi is not easily sour and is controlled to preserve the taste.

In recent years, the kimchi refrigerator is gradually becoming multifunctional, and users use the kimchi refrigerator as a multipurpose refrigerator that stores not only kimchi but also various foods.

The kimchi refrigerator may include a plurality of evaporators, and the plurality of evaporators may cool a plurality of storage chambers. The kimchi refrigerator is a compressor that compresses a refrigerant, a condenser that heats the high-temperature refrigerant compressed by the compressor, a valve that distributes and controls the condensed refrigerant, a capillary that decompresses the high-temperature refrigerant controlled by the valve, and is responsible for cooling each storage It may include an evaporator.

The kimchi refrigerator may function to store kimchi in at least one storage compartment, and when kimchi is exhausted, at least one storage compartment may function to freeze food.

On the other hand, the kimchi refrigerator can be equipped with an inverter compressor with variable compression capacity, detects the amount of load, and drives the compressor with a high RPM when the load is high, and can drive the compressor with a low RPM when the load is low. .

The kimchi refrigerator may have a storage room control temperature of -2℃ to 0℃ when storing kimchi, and if the ambient temperature of the kimchi refrigerator is less than 30℃, the insulation load of the kimchi refrigerator is not large, so there is no need to use a large-capacity compressor.

KR 10-1172054 (09 Aug 2012)

However, the kimchi refrigerator according to the prior art can be used in a refrigeration mode or when the temperature around the kimchi refrigerator is high, the load can be greatly increased, and a compressor with a large capacity is required. In this case, there is a problem that the efficiency in the kimchi storage mode decreases and power consumption increases.

An object of the present invention is to provide a kimchi refrigerator in which power consumption can be improved by controlling a plurality of compressors according to at least one of a storage mode and a use environment.

A refrigerator according to the present invention for solving the above problems includes: a main body having a first storage compartment and a second storage compartment; A compression unit including a first compressor and a second compressor connected in parallel with refrigerant flow paths; A condenser for condensing the refrigerant compressed by the compression unit; A first evaporator for cooling the first storage chamber; A second evaporator having the first evaporator and a refrigerant flow path connected in parallel and cooling the second storage chamber; A first expansion mechanism disposed between the first evaporator and the condenser; And a second expansion mechanism disposed between the second evaporator and the condenser, and the compression unit has an ambient temperature higher than an external set temperature, or at least one of the first storage chamber and the second storage chamber is overloaded, or the first storage chamber and the second storage chamber are In the refrigeration mode, the first compressor and the second compressor are operated. Otherwise, the first compressor is operated and the second compressor is not operated.

The overload may be greater than or equal to a first overload temperature set higher than a temperature of the first storage compartment control upper limit temperature or higher than a second overload temperature set higher than an upper limit temperature control temperature of the second storage compartment.

A refrigerator according to the present invention includes: a main body having a first storage compartment and a second storage compartment; A compression unit including a first compressor and a second compressor connected in parallel with refrigerant flow paths; A condenser for condensing the refrigerant compressed by the compression unit; A first evaporator for cooling the first storage chamber; A second evaporator having a parallel connection between the first evaporator and a refrigerant flow path and cooling the second storage chamber; A first expansion mechanism disposed between the first evaporator and the condenser; And a second expansion mechanism disposed between the second evaporator and the condenser, and the compression unit operates the first compressor and the second compressor when the first storage compartment and the second storage compartment are in a refrigeration mode, and the first storage compartment and When the second storage compartment is in the refrigeration mode, the first compressor is operated and the second compressor is not operated.

The operation of the first compressor and the second compressor may be driven when at least one of the first storage compartment and the second storage compartment is thermo-on, and may be stopped when both the first storage compartment and the second storage compartment are thermo-off.

A refrigerator according to the present invention includes: a main body having a first storage compartment and a second storage compartment; A first cooling circuit in which a first refrigerant circulates between a first compressor, a common condenser, a first expansion mechanism, and a first evaporator, and the first evaporator cools the first storage chamber; The second refrigerant includes a second cooling circuit for circulating a second compressor, the common condenser, a second expansion mechanism, and a second evaporator, and the second evaporator cools the second storage chamber, and the first storage chamber is turned on. Mode, and when the second storage compartment is in an off mode, a first mode in which the first compressor is operated and the first compressor is not operated, and when the first storage compartment is in an off mode, and the second storage compartment is in an on mode , A second mode in which the second compressor is operated and the first compressor is not operated, and when both the first storage chamber and the second storage chamber are in an on mode, the first compressor is operated and the second compressor is operated. The third mode is performed.

In the operation of the first compressor, when the first storage compartment is thermo-on, the first compressor may be driven, and when the first storage compartment is thermo-off, the first compressor may be stopped.

In the operation of the second compressor, when the second storage compartment is thermo-on, the second compressor may be driven, and when the second storage compartment is thermo-off, the second compressor may be stopped.

A first evaporator fan circulating the air of the first storage chamber to the first evaporator and the first storage chamber may be further included, and the first evaporator fan may be driven when the first compressor is driven.

A second evaporator fan circulating the air in the second storage chamber to the second evaporator and the second storage chamber may be further included. The second evaporator fan may be driven when the second compressor is driven.

It may further include a common condensing fan for blowing air to the common condenser. The common condensing fan may be driven when at least one of the first compressor and the second compressor is driven.

The present invention determines whether the refrigeration mode of the kimchi refrigerator and the sudden input of the load and the ambient temperature conditions in which the kimchi refrigerator is operated are appropriately determined to determine whether it is a low-load operation to operate only one compressor or a high-load operation to operate both compressors. By controlling it, there is an advantage in that efficiency decrease in the kimchi storage mode, which is the main operation mode, can be prevented and power consumption can be improved.

The present invention has the advantage of improving power consumption by operating two cooling circuits when there is a large amount of food storage such as Kim Jang-cheol, and operating only one refrigeration circuit when there is no need to cool some of the storage compartments.

1 is a perspective view of an embodiment of a kimchi refrigerator according to the present invention,
2 is a view showing the flow of refrigerant when both the first and second compressors of the kimchi refrigerator according to the present invention are operated.
3 is a view showing the flow of refrigerant when one of the first compressor and the second compressor of the kimchi refrigerator according to the present invention is in operation and the other is not in operation.
4 is a control block diagram of an embodiment of a kimchi refrigerator according to the present invention,
5 is a flowchart of an embodiment of a method of operating a kimchi refrigerator according to the present invention,
6 is a view showing the flow of refrigerant when the first storage chamber of another embodiment of the kimchi refrigerator according to the present invention is on alone.
7 is a view showing the flow of refrigerant when the second storage chamber of another embodiment of the kimchi refrigerator according to the present invention is on alone.
8 is a view showing the flow of refrigerant when both the first storage chamber and the second storage chamber of another embodiment of the kimchi refrigerator according to the present invention are on.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 is a perspective view of an embodiment of a kimchi refrigerator according to the present invention, and FIG. 2 is a diagram showing the flow of refrigerant when both the first and second compressors of the kimchi refrigerator according to the present invention are operated, and FIG. 3 Is a diagram showing the flow of refrigerant when one of the first compressor and the second compressor of one embodiment of the kimchi refrigerator according to the present invention is in operation and the other is not in operation, and FIG. 4 is a control of one embodiment of the kimchi refrigerator according to the present invention It is a block diagram.

The kimchi refrigerator includes a main body 6 in which a first storage compartment 2 and a second storage compartment 4 are formed. The kimchi refrigerator includes a cooling circuit 8 through which a refrigerant can cool both the first storage chamber 2 and the second storage chamber 4.

The main body 6 may have a first storage compartment 2 and a second storage compartment 4 independently formed. The first storage chamber 2 and the second storage chamber 4 may be configured as independent cooling chambers in which air is not mixed with each other. The first storage compartment 2 and the second storage compartment 4 may be arranged vertically or horizontally spaced apart. The first storage compartment 2 and the second storage compartment 4 may be partitioned by a barrier 12. The first storage chamber 2 may be provided in a single number or a plurality of the main body 6. The second storage chamber 4 may be provided in a single number or a plurality of the main body 2. When two storage compartments are formed in the kimchi refrigerator, one of the two may be the first storage compartment 2, and the other of the two may be the second storage compartment 4. When three storage compartments are formed in the kimchi refrigerator, two of the three storage compartments may be the first storage compartment 2, and the remaining one of the three storage compartments may be the second storage compartment 4. When the kimchi refrigerator has four storage compartments, two of the four storage compartments may become the first storage compartment 2 and the remaining two storage compartments may become the second storage compartment 4. When four storage compartments are formed, the kimchi refrigerator can be located so that the upper left storage compartment and the upper right storage compartment are divided left and right, and the central storage compartment may be located at a lower position of the upper left storage compartment and the upper right storage compartment, and the lower side of the central storage compartment. A lower storage compartment may be located. In this case, in the kimchi refrigerator, any one of the upper left storage room and the upper right storage room, and any one of the central storage room and the lower storage room can be the first storage room 2, and the other one of the upper left storage room and the upper right storage room, and the central storage room Another one of the lower storage chambers may be the second storage chamber 4. On the other hand, in the case of a kimchi refrigerator, when four storage rooms are formed, three of the four storage rooms become the first storage room 2, and the remaining one storage room can be the second storage room 4, of course. It goes without saying that the present invention is not limited to the number of storage rooms, and can be applied to 5 or more.

The main body 6 may include a first storage compartment door 14 for opening and closing the first storage compartment 2 and a second storage compartment door 16 for opening and closing the second storage compartment 4. The main body 6 includes an outer case 22 forming the exterior of the kimchi refrigerator, a first storage compartment inner case 24 disposed inside the outer case 22 and having a first storage compartment 2 formed therein, and an outer A second storage compartment inner case 26 disposed inside the case 22 and having a second storage compartment 4 formed therein may be included. A machine room (not shown) may be formed in the body 6. The machine room may be formed behind the lower part of the main body 6. The machine room may be formed elongated in the left and right directions on the main body 6. In the machine room, a first compressor 30 and a second compressor 40 to be described later of the cooling circuit 8 may be disposed. In the machine room, a condenser 50 to be described later of the cooling circuit 8 may be disposed.

In the cooling circuit 8, the refrigerant can cool the first storage chamber 2, the refrigerant can cool the second storage chamber 4, and the refrigerant is used for both the first storage chamber 2 and the second storage chamber 4 Can be cooled. The cooling circuit 8 includes a compression unit 30, a condenser 42, a first evaporator 50, a second evaporator 60, a first expansion mechanism 70, and a second expansion mechanism 80. ) Can be included.

The compression unit 30 may include a first compressor 31 and a second compressor 32. The first compressor 31 and the second compressor 32 may have a refrigerant flow path connected in parallel. The compression unit 30 may include a compression unit suction passage 33 through which refrigerant is sucked into the first compressor 31 and the second compressor 32. The compression unit 30 may include a compression unit discharge passage 34 through which the refrigerant compressed by the first compressor 31 and the refrigerant compressed by the second compressor 32 are discharged. In the first compressor 31 and the second compressor 32, a refrigerant flow path may be connected in parallel by a compression unit suction passage 33 and a compression unit discharge passage 34. The compression unit 30 may have a compression capacity of the first compressor 31 and a compression capacity of the second compressor 32 different from each other. The compression unit 30 may have different types of the first compressor 31 and the second compressor 32 from each other. In the compression unit 30, one of the first compressor 31 and the second compressor 32 may be a constant speed compressor, and the other may be configured as a variable speed compressor such as a linear compressor. The first compressor 31 may be a compressor having a maximum compression capacity corresponding to the kimchi storage mode when both the first storage compartment 2 and the second storage compartment 4 are in the kimchi storage mode. The first compressor 31 may be a compressor having a maximum compression capacity corresponding to the kimchi storage mode when either of the first storage compartment 2 and the second storage compartment 4 is in the kimchi storage mode. In the second compressor 32, the ambient temperature of the refrigerator is at a higher temperature than the normally expected temperature, or the internal temperature of at least one of the first storage compartment 2 and the second storage compartment 4 rapidly increases, or the operation mode of the kimchi refrigerator is changed. It may be a compressor that is operated when it is in an operation mode outside the normal use of a conventional kimchi refrigerator. When the first compressor 31 is a main compressor, the second compressor 32 may be a sub compressor. The first compressor 31 is a compressor that is mainly driven and stopped when the kimchi refrigerator is used, and a compressor having good efficiency in the temperature range of the kimchi storage mode is preferably used. The second compressor 32 is a kind of emergency compressor, and a compressor having excellent compression capability is preferably used. The first compressor 31 may be configured as an inverter compressor, and the second compressor 32 may be configured as a constant speed compressor. It goes without saying that both the first compressor 31 and the second compressor 32 may be configured as inverter compressors. When the kimchi refrigerator is operated in the kimchi storage mode, only the first compressor having good efficiency can be operated, and when an increase in the adiabatic load occurs, the second compressor can be operated together with the first compressor to respond to an increase in the adiabatic load.

The compression unit suction passage 33 includes a suction common passage 35, a first compressor suction passage 36 through which the refrigerant in the suction common passage 35 is sucked into the first compressor 31, and a suction common passage ( A second compressor suction passage 37 through which the refrigerant of 35) is sucked into the second compressor 32 may be included.

The compression unit discharge passage 34 includes a first compressor discharge passage 38 through which the refrigerant discharged from the first compressor 31 is guided, and a second compressor discharge passage through which the refrigerant discharged from the second compressor 32 is guided ( 39), and a discharge common passage 40 through which the refrigerant of the first compressor discharge passage 38 and the refrigerant of the second compressor discharge passage 39 are guided. The common discharge channel 40 may be connected to the condenser 42.

The condenser 42 may condense the refrigerant compressed in the compression unit 30. The condenser 42 may be connected to the first expansion device 70 and the second expansion device 80 through a branch passage 44. The branch flow path 44 includes a condenser outlet flow path 45 connected to the condenser 42, a flow path control valve 46 installed in the condenser outlet flow path 45, and the refrigerant of the flow control valve 46 is a first expansion mechanism ( A first expansion mechanism connection passage 47 guided to 70) and a second expansion mechanism connection passage 48 through which the refrigerant of the flow control valve 46 is guided to the second expansion mechanism 80 may be included. When at least one of the first compressor 31 and the second compressor 32 is driven, the flow path control valve 46 guides the refrigerant to one of the first expansion mechanism 70 and the second expansion mechanism 80. It is possible.

The flow control valve 46 drives at least one of the first compressor 31 and the second compressor 32, and the first storage compartment 2 of the first storage compartment 2 and the second storage compartment 4 is thermo-on. When the second storage chamber 4 is thermo-off, the refrigerant flowing out of the condenser 42 can be guided to flow to the first expansion mechanism 70. When the first storage compartment 2 of the first storage compartment 2 and the second storage compartment 4 is thermo-off and the second storage compartment 4 is thermo-on, the flow control valve 46 flows out from the condenser 42. The refrigerant may be guided to flow to the second expansion mechanism 80. The flow control valve 46 drives at least one of the first compressor 31 and the second compressor 32, and the flow control valve 46 is a thermostat in both the first storage chamber 2 and the second storage chamber 4 When on, the refrigerant flowing out of the condenser 42 may guide the refrigerant to flow to one of the first expansion mechanism 70 and the second expansion mechanism 80 first, and then guide the refrigerant to flow to the other. The flow path control valve 46 may alternately guide the refrigerant discharged from the condenser 42 to the first expansion device 70 and the second expansion device 80. The flow path control valve 46 is able to guide the refrigerant in the order of the first expansion mechanism 70 -> the second expansion mechanism 80 -> the first expansion mechanism 70 -> the second expansion mechanism 80, and It is possible to guide the refrigerant in the order of the second expansion mechanism 80 -> the first expansion mechanism 70 -> the second expansion mechanism 80 -> the first expansion mechanism 70. The flow control valve 46 drives at least one of the first compressor 31 and the second compressor 32, and the flow control valve 46 is a thermostat in both the first storage chamber 2 and the second storage chamber 4 If on, the flow path control valve 46 may also guide the refrigerant to flow to the first expansion mechanism 70 and the second expansion mechanism 80 at the same time.

The first evaporator 50 may cool the first storage chamber 2. The first evaporator 50 may be connected to the compression unit suction flow path 33 and the first evaporator outlet flow path 52. The first evaporator outlet flow path 52 may be connected to the suction common flow path 35.

The second evaporator 60 may have a first evaporator 30 and a refrigerant flow path connected in parallel. The second evaporator 60 may cool the second storage chamber 4. The second evaporator 60 may be connected to the compression unit suction flow path 33 and the second evaporator outlet flow path 62. The second evaporator outlet flow path 62 may be connected to the suction common flow path 35. The second evaporator outlet flow path 62 may constitute a laminated flow path 64 together with the first evaporator outlet flow path 52 and the suction common flow path 35.

The first expansion mechanism 70 may be disposed between the condenser 42 and the first evaporator 50. The first expansion mechanism 70 may be connected to the first evaporator 50 and the first evaporator inlet passage 72. The first expansion mechanism 70 may be composed of a capillary tube or a valve capable of adjusting the opening degree.

The second expansion mechanism 80 may be disposed between the condenser 42 and the second evaporator 60. The second expansion mechanism 80 may be connected to the second evaporator 60 and the second evaporator inlet passage 82. The second expansion mechanism 80 may be composed of a capillary tube or a valve capable of adjusting the opening degree.

The first evaporator 50 and the second evaporator 60 have a branch passage 44, a first evaporator inlet passage 72, and a second evaporator inlet passage 82, and a refrigerant passage in parallel by the combined passage 64. Can be connected.

The kimchi refrigerator may include a condensing fan 43 for blowing air to the condenser 42. The condensing fan 43 may be driven when at least one of the first compressor 31 and the second compressor 32 is driven, and may be stopped if both the first compressor 31 and the second compressor 32 are stopped. The kimchi refrigerator may include a first evaporator fan 56 that circulates the air in the first storage chamber 2 to the first evaporator 50 and the first storage chamber 2. The first evaporator fan 56 may be driven when the first storage compartment 2 is cooled, and may be stopped when the first storage compartment 2 is not cooled. The kimchi refrigerator may include a second evaporator fan 66 that circulates the air in the second storage chamber 4 to the second evaporator 60 and the second storage chamber 4. The second evaporator fan 66 may be driven when the second storage compartment 4 is cooled, and may be stopped when the second storage compartment 4 is not cooled.

The kimchi refrigerator may be composed of a 2 COM-2EVA system having two compressors 31 and 32 and two evaporators 50 and 60, and the first compressor 31 of the two compressors 31 and 32 ) Is mainly operated, and the second compressor 32 of the two compressors 31 and 32 may be operated auxiliary.

The kimchi refrigerator includes an input unit 91 through which a user inputs a command, a first storage room temperature sensor 92 that senses the temperature of the first storage room 2, and a second storage room that senses the temperature of the second storage room 2 A temperature sensor 93 may be included. The kimchi refrigerator may further include an ambient temperature sensor 94 for sensing the ambient temperature.

The kimchi refrigerator controls the kimchi refrigerator according to the input of the input unit 91, the sensing temperature of the first storage chamber temperature sensor 92, the sensing temperature of the second storage chamber temperature sensor 93, and the sensing temperature of the ambient temperature sensor 94. It may further include a control unit 95.

The input unit 91 may receive an input of at least one of the on/off modes of the first storage compartment 2 and the second storage compartment 4. Here, the on mode may be a mode in which the storage compartment is used, and the off mode may be a mode in which the storage compartment is not used. The input unit 91 may receive an on/off mode of each of the first storage compartment 2 and the second storage compartment 4. The input unit 91 may selectively receive one of the plurality of storage modes so that the first storage chamber 2 is controlled to one of the plurality of storage modes. Here, the plurality of storage modes may be a kimchi storage mode, a refrigerated storage mode, a frozen storage mode, and the like. The input unit 91 can receive the desired temperature of the first storage chamber 2. The input unit 91 may selectively receive one of the plurality of storage modes so that the second storage chamber 4 is controlled to one of the plurality of storage modes. Here, the plurality of storage modes may be a kimchi storage mode, a refrigerated storage mode, a frozen storage mode, and the like. The input unit 91 can receive the desired temperature of the second storage chamber 4.

In the kimchi refrigerator, when the storage mode of the first storage compartment 2 is selected as a specific storage mode, the upper control temperature of the first storage compartment 2 and the lower control temperature of the first storage compartment 2 are set for each specific storage mode. It is possible. In the kimchi refrigerator, the control upper limit temperature of the first storage compartment 2 and the control lower limit temperature of the first storage compartment 2 may be set according to the desired temperature of the first storage compartment 2. In the kimchi refrigerator, when the temperature of the first storage compartment 2 exceeds the upper control temperature of the first storage compartment 2, the first storage compartment 2 may be thermo-on, and the temperature of the first storage compartment 2 When the temperature is below the lower control temperature of 2), the first storage chamber 2 may be thermo-off. Here, the thermo-on of the first storage chamber 2 is a condition for driving the first compressor 31 and the second compressor 32 or driving the first compressor 31 to cool the first storage chamber 2 In addition, the thermo-off of the first storage compartment 2 may be a condition of stopping the first compressor 31 and the second compressor 32 in order to stop cooling of the first storage compartment 2.

In the kimchi refrigerator, when the storage mode of the second storage compartment 4 is selected as a specific storage mode, the upper control temperature of the second storage compartment 4 and the lower control temperature of the second storage compartment 4 may be set, respectively. In the kimchi refrigerator, the upper control temperature of the second storage compartment 4 and the lower control temperature of the second storage compartment 4 may be set according to the desired temperature of the second storage compartment 4. In the kimchi refrigerator, when the temperature of the second storage compartment 4 exceeds the upper control temperature of the second storage compartment 4, the second storage compartment 4 may be thermo-on, and the temperature of the second storage compartment 4 may be adjusted to the second storage compartment ( When the temperature is lower than the lower control temperature of 4), the second storage chamber 4 may be thermo-off. Here, the thermo-on of the second storage chamber 4 is a condition for driving the first compressor 31 and the second compressor 32 or driving the first compressor 31 to cool the second storage chamber 4. In addition, the thermo-off of the second storage compartment 4 may be a condition of stopping the first compressor 31 and the second compressor 32 in order to stop cooling of the second storage compartment 10.

In the kimchi refrigerator, both the first storage compartment 2 and the second storage compartment 4 may be in a kimchi storage mode. In the kimchi refrigerator, when any one of the first storage compartment 2 and the second storage compartment 4 is in the kimchi storage mode, the other one of the first storage compartment 2 and the second storage compartment 4 may be a freezing mode. In the kimchi refrigerator, both the first storage compartment 2 and the second storage compartment 4 may be in a freezing mode. In the kimchi refrigerator, the first storage compartment control upper limit temperature and the first storage compartment control lower limit temperature may be different from each other in a kimchi storage mode and a freezing mode. The first storage compartment control lower limit temperature when the first storage compartment 2 is in the refrigeration mode may be lower than the first storage compartment control lower limit temperature when the first storage compartment 2 is in the kimchi storage mode. The first storage compartment control upper limit temperature when the first storage compartment 2 is in the refrigeration mode may be lower than the first storage compartment control upper limit temperature when the first storage compartment 2 is in the kimchi storage mode. The kimchi refrigerator may differ from each other when the second storage compartment control upper limit temperature and the second storage compartment control lower limit temperature are in the kimchi storage mode and the refrigeration mode. The second storage compartment control lower limit temperature when the second storage compartment 4 is in the refrigeration mode may be lower than the second storage compartment control lower limit temperature when the second storage compartment 4 is in the kimchi storage mode. The second storage compartment control upper limit temperature when the second storage compartment 4 is in the refrigeration mode may be lower than the second storage compartment control upper limit temperature when the second storage compartment 4 is in the kimchi storage mode.

The ambient temperature sensor 94 may be installed on one of the main body 6 and the first storage compartment door 14 and the second storage compartment door 16. The ambient temperature sensor 94 may detect the ambient temperature of a place where the kimchi refrigerator is installed. The ambient temperature sensor 94 may sense the temperature and output it to the control unit 95, and the control unit 95 may determine whether to operate the second compressor 32 according to a signal output from the ambient temperature sensor 94. have.

When the ambient temperature is higher than or equal to an external set temperature, at least one of the first storage compartment 2 and the second storage compartment 4 is overloaded, or the first storage compartment 2 and the second storage compartment 4 are in a refrigeration mode, As shown in Fig. 2, the first compressor 31 and the second compressor 32 may be operated, otherwise, as shown in Fig. 3, the first compressor 31 is operated and the second compressor (32) can be deactivated.

Here, the operation of the first compressor 31 and the operation of the second compressor 32 may be driven or stopped in response to the loads of the first storage compartment 2 and the second storage compartment 4. The operation of the first compressor 31 and the second compressor 32 are driven when at least one of the first storage compartment 2 and the second storage compartment 4 is thermo-on, and the first storage compartment 2 and the second If all of the storage rooms 4 are thermo-off, they may be stopped. The first compressor 31 can be driven when at least one of the first storage compartment 2 and the second storage compartment 4 is thermo-on, and both the first and second storage compartments 2 and 4 are thermo-off. If so, it can be stopped. The second compressor 32 may be driven when at least one of the first storage compartment 2 and the second storage compartment 4 is thermo-on, and both the first and second storage compartments 2 and 4 are thermo-off. If so, it can be stopped.

Regardless of the storage mode input to the input unit 51, the compression unit 30 can operate the first compressor 31 and the second compressor 32 if the ambient temperature is above the external set temperature (first condition). have. Here, the ambient temperature may be a temperature sensed by the ambient temperature sensor 94, and the external set temperature is a temperature at which the insulation performance of the refrigerator is lowered below a reference value. The external set temperature may be a temperature when the temperature of the place where the refrigerator is installed is high enough to affect the performance of the kimchi refrigerator. For example, assuming that the refrigerator is typically installed in a place of -10°C to 30°C, the external set temperature may be set to 35°C, which is an excessively high temperature at the place where the refrigerator is installed. When the ambient temperature is higher than the external set temperature (the first condition), the refrigerator can quickly respond to a large external load by operating the two compressors 31 and 32 together, rather than operating only one compressor 31. I can.

Regardless of the storage mode input to the input unit 51, if at least one of the first storage compartment 2 and the second storage compartment 4 is an overload condition (the second condition), the compression unit 30 ) And the second compressor 32 can be operated. Here, the overload may be a load in which the temperature of the first storage chamber 2 is higher than the first overload temperature set higher than the first storage chamber control upper limit temperature. In addition, the overload may be a load in which the temperature of the second storage compartment 4 is higher than the second overload temperature set higher than the upper limit temperature of the second storage compartment control. Here, the first overload temperature may be a temperature when the temperature of the first storage chamber 2 is raised by the first set temperature higher than the control temperature range of the first storage chamber, and is set first than the upper control temperature limit of the first storage chamber. The temperature (for example, 3 ℃ to 5 ℃) may be a high set temperature. In addition, the second overload temperature may be a temperature when the temperature of the second storage chamber 2 is increased by a second set temperature higher than the control temperature range of the second storage chamber, and is set to a second temperature higher than the upper control temperature of the second storage chamber. The temperature (for example, 3 ℃ to 5 ℃) may be a high set temperature. For example, when the upper control temperature of the first storage compartment 2 is 1°C and the lower control temperature of the first storage compartment 2 is -1°C, the first overload temperature may be 6°C. In addition, when the upper control temperature of the second storage compartment 2 is -15 °C and the lower control temperature of the second storage compartment 4 is -17 °C, the second overload temperature may be -10 °C. When a user inserts new food into the kimchi refrigerator, when the first storage compartment door or the second storage compartment door is left open for a long time, when the first storage compartment door or the second storage compartment door is frequently opened and closed, an overload may occur. The refrigerator needs to respond quickly to such overload. In the kimchi refrigerator, when at least one of the first storage compartment 2 and the second storage compartment 4 is an overload condition (the second condition), two compressors 31 and 32 are operated, compared to when only one compressor 31 is operated. ) Can be operated together to quickly respond to load fluctuations.

The compression unit 30 may operate the first compressor 31 and the second compressor 32 if both the first storage compartment 2 and the second storage compartment 4 are in refrigeration mode (a third condition). . The kimchi refrigerator is mainly a refrigerator for storing kimchi at low temperatures, and if the second compressor 32 is driven and stopped only when necessary while the first compressor 31 is installed with a compressor having a capacity suitable for the kimchi storage temperature, one In the case of controlling a large compressor with an inverter, power consumption can be reduced.

In the compression unit 30, only the first compressor 31 may be operated and the second compressor 31 may be deactivated, unless the kimchi refrigerator is in any of the first condition, the second condition, and the third condition. The first compressor 31 may be driven or stopped in response to the loads of the first storage compartment 2 and the second storage compartment 4. The first compressor 31 can be driven when at least one of the first storage compartment 2 and the second storage compartment 4 is thermo-on, and both the first and second storage compartments 2 and 4 are thermo-off. If so, it can be stopped.

On the other hand, the present invention does not consider the first condition and the second condition, and only considers the third condition, and if both the first storage chamber 2 and the second storage chamber 4 are in a freezing mode (the third condition), When the first compressor 31 and the second compressor 32 are operated, and both the first and second storage rooms 2 and 4 are in kimchi storage mode, only the first compressor 31 is operated, and the second compressor Of course, it is possible that (31) is deactivated. That is, when the first storage compartment 2 and the second storage compartment 4 are in the refrigeration mode, the compression unit 30 operates the first compressor 31 and the second compressor 32 regardless of ambient temperature or overload, and Of course, in the refrigeration mode of the first storage compartment 2 and the second storage compartment 4, the first compressor 2 is operated and the second compressor 4 is not operated regardless of ambient temperature or overload.

5 is a flow chart of an embodiment of a method of operating a kimchi refrigerator according to the present invention.

First, when the kimchi refrigerator is powered on, the first storage compartment temperature sensor 92 detects the temperature of the first storage compartment 2, and the second storage compartment temperature sensor 93 detects the temperature of the second storage compartment 2 And, the ambient temperature sensor 94 can detect the ambient temperature.

The kimchi refrigerator can operate the first compressor 31 and the second compressor 32 regardless of overload or storage mode when the ambient temperature sensor 94 has an ambient temperature higher than the external set temperature. (S1) (S4)

In the kimchi refrigerator, when the temperature of the first storage compartment 2 is higher than the first overload temperature or the temperature of the second storage compartment 4 is higher than the second overload temperature, the first compressor 31 and the first compressor 31 2 Compressor 32 can be operated. (S2) (S4)

In the kimchi refrigerator, when the first storage compartment 2 is in the refrigeration mode and the second storage compartment 4 is in the refrigeration mode, the first compressor 31 and the second compressor 32 can be operated regardless of ambient temperature or overload. (S3)(S4)

In the kimchi refrigerator, the ambient temperature of the ambient temperature sensor 94 is less than the external set temperature, the temperature of the first storage compartment 2 is less than the first overload temperature, and the temperature of the second storage compartment 4 is less than the second overload temperature. If both the first storage compartment 2 and the second storage compartment 4 are not in the refrigeration mode, only the first compressor 31 can be driven. (S1) (S2) (S3) (S5)

6 is a diagram showing the flow of refrigerant when the first storage chamber of another embodiment of the kimchi refrigerator according to the present invention is on alone, and FIG. 7 is a flow of refrigerant when the second storage chamber of another embodiment of the kimchi refrigerator according to the present invention is on alone FIG. 8 is a diagram showing the flow of refrigerant when both the first storage chamber and the second storage chamber of another embodiment of the kimchi refrigerator according to the present invention are on.

The kimchi refrigerator of this embodiment includes a first cooling circuit 108 through which a first refrigerant circulates and a second cooling circuit 110 through which a second refrigerant circulates. In the first cooling circuit 108, a first refrigerant may cool the first storage chamber 2, and in the second cooling circuit 110, a second refrigerant may cool the second storage chamber 4. Other configurations and operations of the main body 6 or the input unit 91 other than the first cooling circuit 108 and the second cooling circuit 110 are the same or similar to those of the embodiment of the present invention, so the same reference numerals are used and Detailed description is omitted.

In the first cooling circuit 108, the first refrigerant circulates through the first compressor 132, the common condenser 134, the first expansion mechanism 136, and the first evaporator 138, and the first evaporator 138 is The first storage chamber 2 is cooled.

In the second cooling circuit 110, the second refrigerant circulates through the second compressor 142, the common condenser 134, the second expansion mechanism 146, and the second evaporator 148, and the second evaporator 148 is Cools the second storage chamber 4.

The first compressor 132 of the first cooling circuit 108 and the second compressor 142 of the second cooling circuit 110 and the common condenser 134 may be disposed in the machine room of the main body 6.

The first cooling circuit 108 and the second cooling circuit 110 may independently cool the first storage chamber 2 and the second storage chamber 4. The first refrigerant of the first cooling circuit 108 and the second refrigerant of the second cooling circuit 110 are not mixed with each other, and each of the first cooling circuit 108 and the second cooling circuit 110 is independently circulated. I can. As for the first refrigerant and the second refrigerant, different types of refrigerants may be used, and the same type of refrigerants may be used.

The common condenser 134 may include a first tube through which a first refrigerant flows, a second tube through which a second refrigerant flows, and a common fin coupled to the first tube and the second tube. The common condenser 134 may be formed independently without mixing the flow path of the first tube and the flow path of the second tube, and a common pin may be used in common.

The input unit 91 may selectively receive an on mode in which the first storage compartment 2 is temperature controlled and an off mode in which the first storage compartment 2 is maintained without temperature control. The user can put the storage in the first storage compartment 2 and input it in the on mode of the first storage compartment 2 through the input unit 91, and the off mode of the first storage compartment 2 through the input unit 91 It is possible to enter as The kimchi refrigerator may cool the first storage compartment 2 according to the load in the on mode of the first storage compartment 2, and may not adjust the temperature of the first storage compartment 2 in the off mode. The input unit 91 may selectively receive an ON mode in which the second storage compartment 4 is temperature controlled and an off mode in which the second storage compartment 4 is maintained without temperature control. The user can put the storage material in the second storage room 4 and input it in the on mode of the second storage room 4 through the input unit 91, and the off mode of the second storage room 4 through the input unit 91 It is possible to enter as The kimchi refrigerator may cool the second storage compartment 4 according to the load in the on mode of the second storage compartment 4, and may not adjust the temperature of the second storage compartment 4 in the off mode.

In the kimchi refrigerator, when the first storage compartment 2 is in the on mode and the second storage compartment 4 is in the off mode, the first compressor 132 is operated and the second compressor 142 is not operated. can do. The first mode may be a single cooling mode in the first storage compartment, and only the first compressor 132 may be driven or stopped according to a load in a state in which the second compressor 142 is not driven but stopped. The operation of the first compressor 132 may be driven when the first storage compartment 2 is in the on mode, when the first storage compartment 2 is thermo-on, and may be stopped when the first storage compartment 2 is thermo-off. . In the kimchi refrigerator, while in the first mode, the temperature of the first storage compartment 2 may rise or fall according to the passage of time or load fluctuations, and the first compressor 132 may alternately repeat driving and stopping. . The second compressor 142 may maintain a stopped state in the first mode.

In the kimchi refrigerator, when the first storage compartment 2 is in the off mode and the second storage compartment 4 is in the on mode, the second compressor 142 is operated and the first compressor 132 is not operated. can do. The second mode may be an independent cooling mode in the second storage compartment, and only the second compressor 142 may be driven or stopped according to a load in a state in which the first compressor 132 is not driven but is stopped. The operation of the second compressor 142 may be driven when the second storage compartment 4 is in the on mode and the second storage compartment 4 is thermo-on, and may be stopped when the second storage compartment 4 is thermo-off. . In the kimchi refrigerator, while in the second mode, the temperature of the second storage compartment 4 may rise or fall according to the lapse of time or the fluctuation of the load, and the second compressor 142 may alternately repeat driving and stopping. . The first compressor 132 may maintain a stopped state in the second mode.

In the kimchi refrigerator, when both the first storage compartment 2 and the second storage compartment 4 are in an on mode, a third mode in which the first compressor 132 is operated and the second compressor 142 is operated may be performed. The third mode may be a simultaneous cooling mode of the first storage compartment and the second storage compartment, and the first compressor 132 and the second compressor 142 may be independently driven and stopped. The operation of the first compressor 132 may be driven when the first storage compartment 2 is in the on mode, when the first storage compartment 2 is thermo-on, and may be stopped when the first storage compartment 2 is thermo-off. . In the kimchi refrigerator, while in the third mode, the temperature of the first storage compartment 2 may rise or fall according to the passage of time or load fluctuations, and the first compressor 132 may alternately repeat driving and stopping. . The second compressor 142 may maintain a stopped state in the third mode. The operation of the second compressor 142 may be driven when the second storage compartment 4 is in the on mode and the second storage compartment 4 is thermo-on, and may be stopped when the second storage compartment 4 is thermo-off. . In the kimchi refrigerator, while in the third mode, the temperature of the second storage compartment 4 may rise or fall according to the passage of time or load fluctuations, and the second compressor 142 may alternately repeat driving and stopping. . The first compressor 132 may maintain a stopped state in the third mode.

Hereinafter, the third mode will be described in detail.

In the third mode, when the first storage compartment 2 is thermo-on, and the second storage compartment 4 is thermo-off, the first compressor 132 may be driven and the second compressor 142 may be stopped.

In the third mode, when the first storage compartment 2 is thermo-off and the second storage compartment 4 is thermo-on, the second compressor 142 may be driven and the first compressor 132 may be stopped.

In the third mode, when both the first storage compartment 2 and the second storage compartment 4 are thermo-on, the first compressor 132 and the second compressor 34 may be driven respectively.

The kimchi refrigerator may include a first evaporator fan 152 that circulates air from the first storage chamber 2 to the first evaporator 138 and the first storage chamber 2. The kimchi refrigerator may include a second evaporator fan 148 that circulates air from the second storage chamber 4 to the second evaporator 148 and the second storage chamber 4. The kimchi refrigerator may include a common condensing fan 156 for blowing air to the common condenser 134.

The first evaporator fan 152 may be driven when the first compressor 132 is driven.

The second evaporator fan 154 may be driven when the second compressor 142 is driven.

The common condensing fan 156 may be driven when at least one of the first compressor 132 and the second compressor 34 is driven.

Hereinafter, the operation of the present invention configured as described above will be described.

First, the operation of the first mode will be described in detail as follows.

When the first storage compartment 2 is in the on mode, the second storage compartment 4 is in the off mode, and the first storage compartment 2 is thermo-on, condensation is shared with the first compressor 132 and the first evaporator fan 152 The fan 156 may be driven, and the second compressor 142 and the second evaporator fan 154 may be stopped. When the first compressor 132 is driven, the first refrigerant connects the first compressor 132, the common condenser 134, the first expansion mechanism 136, and the first evaporator 138, as shown in FIG. After passing sequentially, it may be introduced into the first compressor 132. After the first refrigerant is compressed in the first compressor 132, it flows to the common condenser 134, passes through the common condenser 134, and heat exchange with air blown from the common condensing fan 156 to be condensed. The first refrigerant condensed in the common condenser 134 may be expanded in the first expansion mechanism 136 and then may flow to the first evaporator 138. The first refrigerant flowing to the first evaporator 138 may be evaporated by heat exchange with the air flowing in the first storage chamber 138 and may flow to the first compressor 132. Meanwhile, the air heat-exchanged with the first refrigerant in the first evaporator 138 is blown to the first storage chamber 138 to cool the first storage chamber 138. The first storage compartment 2 may be gradually cooled by the first refrigerant, and the first storage compartment 2 may be thermo-off as time elapses.

When the first storage chamber 2 is in the on mode, the second storage chamber 4 is in the off mode, and the first storage chamber 2 is thermo-off, condensation is shared with the first compressor 132 and the first evaporator fan 152 The fan 156 may be stopped, and the second compressor 142 and the second evaporator fan 154 may be maintained in a stopped state. The first refrigerant does not circulate through the first cooling circuit 108, and the first storage chamber 2 may be heated when time elapses or when a new storage material is input from the outside. The first storage compartment 2 may be thermo-on by the passage of time or the input of a new storage material.

When the first storage compartment 2 is in the on mode and the second storage compartment 4 is in the off mode, the kimchi refrigerator is operated according to the thermo-on and thermo-off of the first storage compartment 2, the first compressor 132 and the first The evaporator fan 152 and the common condensing fan 156 may be driven or stopped, and at this time, the second compressor 142 and the second evaporator fan 154 may be continuously stopped.

The operation of the second mode will be described in detail as follows.

When the first storage compartment 2 is in the off mode, the second storage compartment 4 is in the on mode, and the second storage compartment 4 is thermo-on, condensation is shared with the second compressor 142 and the second evaporator fan 154 The fan 156 may be driven, and the first compressor 132 and the first evaporator fan 152 may be stopped. When the second compressor 142 is driven, the second refrigerant moves the second compressor 142, the common condenser 134, the second expansion mechanism 146, and the second evaporator 148, as shown in FIG. After passing sequentially, it may be introduced into the second compressor 142. After the second refrigerant is compressed in the second compressor 142, it flows to the common condenser 134, passes through the common condenser 134, and exchanges heat with air blown from the common condensing fan 156 to be condensed. The second refrigerant condensed in the common condenser 134 may be expanded in the second expansion mechanism 146 and then may flow to the second evaporator 148. The second refrigerant flowing to the second evaporator 148 may be evaporated by heat exchange with the air flowing in the second storage chamber 148 and may flow to the second compressor 142. Meanwhile, the air heat-exchanged with the second refrigerant in the second evaporator 148 is blown to the second storage chamber 148 to cool the second storage chamber 148. The second storage chamber 4 may be gradually cooled by the second refrigerant, and the second storage chamber 4 may be thermo-off as time elapses.

When the first storage compartment 2 is in the off mode, the second storage compartment 4 is in the on mode, and the second storage compartment 4 is thermo-off, condensation is shared with the second compressor 142 and the second evaporator fan 154 The fan 156 may be stopped, and the first compressor 132 and the first evaporator fan 152 may be maintained in a stopped state. The second refrigerant does not circulate through the second cooling circuit 110, and the second storage chamber 4 may be heated when time elapses or when a new storage material is input from the outside. The second storage compartment 4 may be thermo-on by the passage of time or the input of a new storage material.

When the first storage compartment 2 is in the off mode and the second storage compartment 4 is in the on mode, the kimchi refrigerator is operated according to the thermo-on and thermo-off of the second storage compartment 4, the second compressor 142 and the second The evaporator fan 154 and the common condensing fan 156 may be driven or stopped. At this time, the first compressor 132 and the first evaporator fan 152 may be stopped.

The operation of the third mode will be described in detail as follows.

When the first storage compartment 2 is in the on mode, the second storage compartment 4 is in the on mode, and the first storage compartment 2 and the second storage compartment 4 are each thermo-on, the first compressor 132 and the first The evaporator fan 152, the second compressor 142, the second evaporator fan 154, and the common condensing fan 156 may be driven. When the first compressor 132 is driven, the first refrigerant moves the first compressor 132, the common condenser 134, the first expansion mechanism 136, and the first evaporator 138, as shown in FIG. After passing sequentially, the second refrigerant may be introduced into the first compressor 132, and when the second compressor 32 is driven, the second refrigerant is the second compressor 142 and the common condenser 134, as shown in FIG. And after passing through the second expansion mechanism 146 and the second evaporator 148 in sequence, it may be introduced into the second compressor 142. Air heat-exchanged with the first refrigerant in the first evaporator 138 is blown to the first storage chamber 138 to cool the first storage chamber 138. The first storage chamber 2 may be gradually cooled by the first refrigerant. Air heat-exchanged with the second refrigerant in the second evaporator 148 may be blown into the second storage chamber 148 to cool the second storage chamber 148. The second storage chamber 4 may be gradually cooled by the second refrigerant. In the kimchi refrigerator, in the middle of the third mode, the first storage compartment 2 is thermo-off or the second storage compartment 4 is thermo-off, and the first compressor 132 is independent of the second storage compartment 4. 2) can be driven and stopped according to the thermo on/off of 2), and the second compressor 142 can be driven or stopped according to the thermo on/off of the second storage compartment 4 regardless of the first storage compartment 2 have. In the middle of the third mode, when the first storage compartment 2 is thermo-on, and the second storage compartment 4 is thermo-off, the first compressor 132, the first evaporator fan 152, and the common condensing fan 156 are It continues to be driven, and the second compressor 142 and the second evaporator fan 154 may be stopped by the thermo-off of the second storage chamber 4. Conversely, if the second storage chamber 4 is thermo-on in the middle of the third mode, and the first storage chamber 2 is thermo-off, the second compressor 142, the second evaporator fan 154, and the common condensing fan 156 ) Is continuously driven, and the first compressor 132 and the first evaporator fan 152 may be stopped by the thermo-off of the first storage chamber 2. In the kimchi refrigerator, in the middle of the third mode, there may be a time when both the first storage compartment 2 and the second storage compartment 4 are thermo-off. In this case, the kimchi refrigerator includes the first compressor 132 and the first evaporator fan ( All of the 152, the second compressor 142, the second evaporator fan 154, and the common condensing fan 156 may be stopped. While the kimchi refrigerator is in the third mode, the first compressor 132 and the first evaporator fan 152 may be driven and stopped according to the thermo-on and off of the first storage chamber 2, and the second compressor 142 And the second evaporator 154 may be driven or stopped according to the thermo-on or off of the second storage chamber 2.

2: first storage room 4: second storage room
6: main body 8: cooling circuit
30: compression unit 31: first compressor
32: second compressor 42: condenser
50: first evaporator 60: second evaporator
70: first expansion device 80: second expansion device
91: input unit 92: first storage room temperature sensor
93: second storage room temperature sensor 94: ambient temperature sensor
95: control unit

Claims (10)

A body having a first storage compartment and a second storage compartment;
A compression unit including a first compressor and a second compressor connected in parallel with refrigerant flow paths;
A condenser for condensing the refrigerant compressed by the compression unit;
A first evaporator for cooling the first storage chamber;
A second evaporator having a parallel connection between the first evaporator and a refrigerant flow path and cooling the second storage chamber;
A first expansion mechanism disposed between the first evaporator and the condenser;
It includes a second expansion mechanism disposed between the second evaporator and the condenser,
The compression unit
The first compressor is operated and the second compressor is not operated,
A kimchi refrigerator in which the first and second compressors are operated when the ambient temperature is higher than an external set temperature, at least one of the first storage compartment and the second storage compartment is overloaded, or when the first storage compartment and the second storage compartment are in refrigeration mode. The method of claim 1,
The operation of the first compressor and the operation of the second compressor,
It is driven when at least one of the first storage compartment and the second storage compartment is thermo-on,
A kimchi refrigerator that is stopped when both the first and second storage compartments are thermo off. The method according to claim 1 or 2,
The overload is
A kimchi refrigerator in which the temperature of the first storage compartment is greater than or equal to a first overload temperature set higher than the first storage compartment control upper limit temperature, or the temperature of the second storage compartment is greater than or equal to a second overload temperature set higher than the second storage compartment control upper limit temperature. A body having a first storage compartment and a second storage compartment;
A compression unit including a first compressor and a second compressor connected in parallel with refrigerant flow paths;
A condenser for condensing the refrigerant compressed by the compression unit;
A first evaporator for cooling the first storage chamber;
A second evaporator having a parallel connection between the first evaporator and a refrigerant flow path and cooling the second storage chamber;
A first expansion mechanism disposed between the first evaporator and the condenser;
It includes a second expansion mechanism disposed between the second evaporator and the condenser,
The compression unit
When the first storage compartment and the second storage compartment are in a refrigeration mode, the first compressor and the second compressor are operated,
A kimchi refrigerator in which the first compressor is operated and the second compressor is not operated when the first storage compartment and the second storage compartment are in refrigeration mode. The method of claim 4,
The operation of the first compressor and the operation of the second compressor,
It is driven when at least one of the first storage compartment and the second storage compartment is thermo-on,
A kimchi refrigerator that is stopped when both the first and second storage compartments are thermo off. A body having a first storage compartment and a second storage compartment;
A first cooling circuit in which a first refrigerant circulates between a first compressor, a common condenser, a first expansion mechanism, and a first evaporator, and the first evaporator cools the first storage chamber;
A second refrigerant circulates a second compressor, the common condenser, a second expansion mechanism, and a second evaporator, and the second evaporator includes a second cooling circuit for cooling the second storage chamber,
When the first storage compartment is in an on mode and the second storage compartment is in an off mode, a first mode in which the first compressor is operated and the second compressor is not operated is performed,
When the first storage compartment is in an off mode and the second storage compartment is in an on mode, a second mode in which the second compressor is operated and the first compressor is not operated is performed,
When both the first storage compartment and the second storage compartment are in an on mode, the kimchi refrigerator performs a third mode in which the first compressor is operated and the second compressor is operated. The method of claim 6,
In the operation of the first compressor, when the first storage compartment is thermo-on, the first compressor is driven, and when the first storage compartment is thermo-off, the first compressor is stopped,
The kimchi refrigerator in which the second compressor is operated when the second storage compartment is thermo-on, and the second compressor is stopped when the second storage compartment is thermo-off. The method of claim 7,
Further comprising a first evaporator fan circulating the air in the first storage chamber to the first evaporator and the first storage chamber,
The first evaporator fan is a kimchi refrigerator that is driven when the first compressor is driven. The method according to claim 7 or 8,
Further comprising a second evaporator fan circulating the air of the second storage chamber to the second evaporator and the second storage chamber,
The second evaporator fan is a kimchi refrigerator that is driven when the second compressor is driven. The method of claim 7,
Further comprising a common condensing fan for blowing air to the common condenser,
The common condensing fan is a kimchi refrigerator that is driven when at least one of the first and second compressors is driven.

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