KR20190096698A - Refrigerator and Control method of the same - Google Patents

Abstract

The present invention relates to a refrigerator and an operation method of the same. According to the present invention, the refrigerator comprises: a cabinet which includes: a freezing chamber; a refrigerating chamber; and heat exchange chambers respectively communicating with the freezing chamber and the refrigerating chamber; an evaporator placed in the heat exchange chamber; a compressor connected to the evaporator to compress a refrigerant; a cooling fan placed in the heat exchange chamber to send the cold air cooled down by the evaporator to the freezing chamber and the refrigerating chamber; a refrigerating chamber temperature sensor which detects a temperature in the refrigerating chamber; and a control unit which performs a reference cooling operation which, when the temperature detected by the refrigerating chamber temperature sensor is the same as or higher than a first compressor driving temperature, drives the compressor and the cooling fan, and, if the temperature detected by the refrigerating chamber temperature sensor is the same as or lower than a first compressor stop temperature, stops the compressor and the cooling fan. The control unit performs a freezing chamber high-temperature cooling operation which, after the reference cooling operation, if the temperature detected by the refrigerating chamber temperature sensor is the same as or higher than a second compressor driving temperature, drives the compressor by a preset low-cooling force and rotates the cooling fan at a low speed, and, if the temperature detected by the refrigerating chamber temperature sensor is the same as or lower than a second compressor stop temperature, stops the compressor and the cooling fan. According to the present invention, the control unit is able to, when performing the freezing chamber high-temperature cooling operation, allow the temperature of the refrigerating chamber and the temperature of the freezing chamber to be slowly lowered, to extend the time for the compressor to be continuously driven, to prevent the compressor from being stopped by a temperature of the refrigerating chamber with the freezing chamber load not sufficiently relieved, and to stop the compressor with the load of the freezing chamber sufficiently relieved.

Description

Refrigerator and its operation method {Refrigerator and Control method of the same}

The present invention relates to a refrigerator, and more particularly to a refrigerator for controlling the compressor and the cooling fan according to the refrigerator compartment temperature.

A refrigerator is a device that prevents decay and deterioration by cooling an object to be cooled (hereinafter referred to as a food) such as food, medicine, cosmetics, or at a low temperature.

The refrigerator includes a cabinet having a freezer compartment and a refrigerating compartment, a freezer compartment door connected to the cabinet to open and close the freezer compartment, a refrigerator compartment door connected to the cabinet to open and close the refrigerating compartment, and a refrigerating cycle apparatus to cool the freezer compartment and the refrigerating compartment.

The refrigeration cycle apparatus may include a compressor, a condenser, an expansion device, and an evaporator through which the refrigerant is circulated.

The refrigerator may further include a cooling fan for flowing the air of the freezer compartment and the air of the refrigerating compartment to the evaporator.

The refrigerator may include a refrigerator compartment temperature sensor that senses a temperature of the refrigerator compartment, and may further include a controller that controls on / off of each of the compressor and the cooling fan according to the temperature sensed by the refrigerator compartment temperature sensor.

As described above, an example of a refrigerator controlling the compressor and the cooling fan based on the temperature of the refrigerating chamber is disclosed in Korean Patent Laid-Open Publication No. 2000-0028515 A (published on May 25, 2000). In response to the change in temperature, the off-control temperature of the compressor and blower fan, which are the main targets for the generation of cold air, is controlled to be set lower than the reference temperature to prevent the temperature rise in the freezer and the refrigerating chamber even when the ambient temperature is low. In addition, as the number of parts is reduced, manufacturing cost can be lowered and power consumption can be reduced.

However, in the refrigerator according to the related art, the off-control temperature of the compressor and the blower fan is determined by using the ambient temperature as a factor. Therefore, even if the freezer is at a high temperature, if the ambient temperature is high, the off-control temperature of the compressor is determined to be high, and the freezer is at a high temperature. There is a problem that the time that the compressor is off is long, and the time that the freezing chamber is maintained at a high temperature is increased.

Republic of Korea Patent Publication No. 2000-0028515 A (published May 25, 2000)

SUMMARY OF THE INVENTION An object of the present invention is to provide a refrigerator and a method of operating the same, by controlling a compressor and a fan so that a time during which a compressor is maintained at a high temperature in a freezer compartment is increased, thereby rapidly responding to load fluctuations in the freezer compartment.

According to an embodiment of the present invention, a refrigerator includes: a cabinet in which a freezing compartment and a refrigerating compartment are formed and a heat exchange chamber communicating with each of the freezing compartment and a refrigerating compartment; An evaporator disposed in the heat exchange chamber; A compressor connected to the evaporator and compressing the refrigerant; A cooling fan disposed in the heat exchange chamber and blowing cold air cooled by the evaporator to the freezing compartment and the refrigerating compartment; A refrigerator compartment temperature sensor for sensing a temperature of the refrigerator compartment; If the temperature detected by the refrigerator compartment temperature sensor is equal to or higher than the first compressor driving temperature, the compressor and the cooling fan are driven. When the temperature detected by the refrigerator compartment temperature sensor is lower than or equal to the first compressor stop temperature, the reference cooling operation stops the compressor and the cooling fan. It includes a control unit for performing, After the reference cooling operation, if the temperature detected by the refrigerating compartment temperature sensor is equal to or higher than the second compressor driving temperature, the controller drives the compressor at a set low cooling power, rotates the cooling fan at a low speed, and detects the temperature detected by the refrigerating compartment temperature sensor. 2 If the temperature is lower than the compressor stop temperature, the freezer compartment high temperature cooling operation to stop the compressor and the cooling fan is performed.

The controller may stop the compressor and the cooling fan when the temperature sensed by the refrigerating compartment temperature sensor during the freezer compartment high temperature cooling operation is equal to or lower than the second compressor stop temperature set to be lower than the first compressor stop temperature by the set temperature.

The controller may perform a freezer compartment high temperature cooling operation when the evaporator temperature exceeds the first set temperature after the defrosting operation of defrosting the evaporator is completed.

The controller may perform the freezer compartment high temperature cooling operation when the evaporator temperature exceeds the second set temperature after the freezer compartment door that opens and closes the freezer compartment.

The controller may perform the freezer compartment high temperature cooling operation when the freezer door is kept open for more than an open set time.

The controller may terminate the freezer compartment high temperature cooling operation for a predetermined time and then perform the reference cooling operation.

A method of operating a refrigerator according to an embodiment of the present invention includes a reference cooling step and a freezer compartment high temperature cooling step performed after the reference cooling step.

In the reference cooling step, if the temperature detected by the refrigerator compartment temperature sensor is equal to or higher than the first compressor driving temperature, the compressor is driven at the reference cooling force, the cooling fan is rotated at the reference wind speed, and the temperature detected by the refrigerator compartment temperature sensor stops the first compressor. If it is below temperature, a compressor and a cooling fan can be stopped.

In the freezer high temperature cooling step, if the temperature detected by the refrigerating chamber temperature sensor is higher than the second compressor driving temperature, the compressor is driven at a set low cooling power, the cooling fan is rotated at a low speed, and the temperature detected by the refrigerating chamber temperature sensor is the second compressor. If it is below the stop temperature, the freezing chamber high temperature cooling step of stopping the compressor and the cooling fan.

The second compressor stop temperature may be a temperature set lower than the first compressor stop temperature.

In the freezer compartment high temperature cooling step, the evaporator temperature exceeds the first set temperature after the defrosting operation of defrosting the evaporator is completed, or the evaporator temperature exceeds the second set temperature after the freezer door opening and closing of the freezer compartment, or the freezer door is kept open. If the set time is greater than or equal to the open set time, it may be implemented.

The freezer compartment high temperature cooling step may be terminated after being performed for a predetermined time, and the reference cooling step may be performed after the freezer compartment high temperature cooling step.

According to an embodiment of the present invention, during a freezer compartment high temperature cooling, the compressor is driven at a set low cooling power and the cooling fan is rotated at a low speed so that the temperature of the refrigerator compartment and the temperature of the freezer compartment are slowly lowered, and the compressor is continuously driven. By increasing the time required, the compressor can be prevented from being stopped by the refrigerating chamber temperature while the freezer compartment load is not sufficiently resolved, and the compressor can be stopped while the load of the freezer compartment is sufficiently released.

In addition, without the freezer compartment temperature sensor, when the freezer compartment is in a high temperature condition, it is possible to delay the time when the compressor and the fan are stopped, and allow the freezer compartment to be cooled for a long time, thereby releasing the load of the freezer compartment quickly.

In addition, the compressor stop temperature in the freezer compartment high temperature cooling is set to be lower than the compressor stop temperature in the reference cooling, so that during the freezer compartment high-temperature cooling, each time the compressor is continuously driven and the freezer compartment is kept cool, the maximum can be increased, Can more effectively eliminate the load.

1 is a view showing a refrigeration cycle apparatus of a refrigerator according to an embodiment of the present invention,
2 is a longitudinal sectional view showing a refrigerator according to an embodiment of the present invention;
3 is a control block diagram of a refrigerator according to an embodiment of the present invention;
4 is a flowchart illustrating a method of operating a refrigerator according to an embodiment of the present invention;
5 is a view showing a change in the compressor control and load of the comparative example compared with the embodiment of the present invention,
6 is a view illustrating a change in the compressor control and load according to an embodiment of the present invention.

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

1 is a view showing a refrigeration cycle apparatus of a refrigerator according to an embodiment of the present invention, Figure 2 is a longitudinal sectional view showing a refrigerator according to an embodiment of the present invention, Figure 3 is a refrigerator according to an embodiment of the present invention Is a control block diagram.

The refrigerator of this embodiment includes a cabinet 1 in which a freezing compartment F and a refrigerating compartment R are formed and a heat exchange chamber H communicating with each of the freezing compartment F and the refrigerating compartment R is formed.

The cabinet 1 may include a barrier 2 partitioning the freezing compartment F and the refrigerating compartment R. As shown in FIG. The cabinet 1 includes an outer case 3 forming the exterior of a refrigerator, a freezer inner case 4 disposed inside the outer case 3 and having a freezer compartment F formed therein, and an outer case 2. It may include a refrigerating compartment inner case 5 disposed inside and having a refrigerating compartment R formed therein.

The cabinet 1 may further include an inner duct 6 disposed inside the freezer compartment inner case 3 or the refrigerating compartment inner case 4 and forming a heat exchange chamber H.

The inner duct 6 is arranged inside the freezer compartment inner case 4 to partition the interior of the freezer compartment inner case 4 into the freezer compartment F and the heat exchange chamber H. The inner duct 6 has a heat exchanger. A cold air discharge port 7 through which cold air cooled in the chamber H is discharged to the freezing chamber F may be formed. The cabinet 1 may further include a refrigerator compartment duct 8 for guiding the cold air cooled in the heat exchange chamber H to the refrigerator compartment R. FIG.

The inner duct 6 may be disposed inside the refrigerating compartment inner case 5 to partition the inside of the refrigerating compartment inner case 5 into the refrigerating chamber R and the heat exchange chamber H, and the inner duct 6 may exchange heat. A cold air discharge port through which cold air cooled in the chamber H is discharged to the refrigerating chamber R may be formed. In this case, the cabinet 1 may further include a refrigerator compartment duct (not shown) for guiding the cold air cooled in the heat exchange chamber (H) to the freezer compartment (F).

The refrigerator may further include a freezer compartment door 9 connected to the cabinet 1 to open and close the freezer compartment F, and a refrigerating compartment door 10 connected to the cabinet 1 to open and close the refrigerating compartment R.

The refrigerator may further include an evaporator 11 that cools the surroundings while the refrigerant passes therethrough. The evaporator 11 may be arranged in the heat exchange chamber (H). The evaporator 11 may cool the cold air introduced from the refrigerating chamber (R) and the cold air introduced from the freezing chamber (F).

The refrigerator may be equipped with a refrigeration cycle apparatus including an evaporator (11).

The refrigerator may further include a compressor 12 connected to the evaporator 11 and compressing the refrigerant. The compressor 12 may be connected to the evaporator 11 and the compressor suction tube 13. The compressor discharge tube 14 through which the refrigerant compressed by the compressor 12 is discharged may be connected to the compressor 12.

The refrigerator may further include a condenser 15 that condenses the refrigerant compressed by the compressor 12 by exchanging heat with the outside air. The condenser 15 may be connected to the compressor discharge tube 14 and heat exchange the refrigerant introduced through the compressor discharge tube 14 with the outside air. Condenser 15 may be connected to the condenser outlet tube 16 for guiding the refrigerant passing through the condenser 15 to the expansion mechanism 18 to be described later.

The refrigerator may further include a condensation fan 17 for blowing outside air to the condenser 15.

The refrigerator may further include an expansion mechanism 18 such as a capillary tube or an electronic expansion valve for expanding the refrigerant condensed in the condenser 15. The expansion mechanism 18 may be connected to the condenser outlet tube 16. The expansion mechanism 18 may be connected to the evaporator 10 and the evaporator inlet tube 19, and the refrigerant expanded by the expansion mechanism 18 may be introduced into the evaporator 11 to be evaporated while passing through the evaporator 11. have.

The refrigerator may further include an evaporator temperature sensor 20 installed in the evaporator 11.

The refrigerator further includes a cooling fan 22 disposed in the heat exchange chamber (H). The cooling fan 22 may blow the cold air cooled by the evaporator 11 to the freezing chamber F and the refrigerating chamber R.

The refrigerator of the present embodiment may include a 1 COMP and 1 EVA cooling system for cooling the freezer compartment F and the refrigerating compartment R together with one compressor 12 and one evaporator 11.

The refrigerator may further include a controller 30 that controls the compressor 12 and the cooling fan 22.

The refrigerator may control the compressor 12 and the cooling fan 22 based on the temperature of the refrigerating compartment R. For this purpose, the refrigerator may include a refrigerating compartment temperature sensor 40 for detecting a temperature of the refrigerating compartment R. .

The controller 30 drives the compressor 12 when the temperature detected by the refrigerator compartment temperature sensor 40 is equal to or higher than the compressor driving temperature, and when the temperature detected by the refrigerator compartment temperature sensor 40 is equal to or lower than the compressor stop temperature, the compressor 12. ) Can be stopped.

The refrigerator does not include a freezer temperature sensor (not shown) for sensing the temperature of the freezer compartment F, and the controller 30 controls the cooling power of the compressor 12 and the cooling fan 22 to eliminate the load variation of the freezer compartment. Each of the wind speeds can be varied.

The refrigerator may further include a defrost heater 50 capable of defrosting the evaporator 11. The defrost heater 50 may be disposed in the evaporator 11 or disposed around the evaporator 11 to heat the evaporator 11.

The refrigerator may further include a timer 60 capable of counting time. The timer 60 may be controlled by the control unit 30, and may count various times such as the time when the freezer door 9 is opened.

 The refrigerator may further include a door switch 70 capable of detecting opening and closing of the freezer door 9. The door switch 70 may be mounted in the cabinet 1 and switched by the freezer door 9, or may be mounted in the freezer door 9 and switched by the cabinet 1.

The control unit 30 controls the compressor 12 and the cooling fan 22 on the basis of the temperature of the refrigerating chamber R, and if the rapid rise of the temperature of the freezer compartment occurs, the cooling power (power consumption) of the compressor 12 The variable control for the freezer high temperature cooling.

The controller 30 may perform a standard cooling operation and a freezer compartment high temperature cooling operation.

The reference cooling operation may be a general operation of controlling the compressor 12 and the cooling fan 22 in a normal state where the freezing compartment F is not at a high temperature.

In addition, the freezer compartment high temperature cooling ion may be a special operation of controlling the compressor 12 and the cooling fan 22 in a state where the freezer compartment F is at a high temperature.

The controller 30 may selectively perform the reference cooling operation and the freezing chamber high temperature cooling operation without performing the standard cooling operation and the freezing chamber high temperature cooling operation together.

When the freezer compartment F is at a high temperature in the middle of the reference cooling operation, the control unit 30 may terminate the reference cooling operation and perform the freezing chamber high temperature cooling operation. When the freezing chamber high temperature cooling operation is completed, the reference cooling again. You can drive. The controller 30 may alternately perform the standard cooling operation and the freezer compartment high temperature cooling operation.

In the standard cooling operation and the freezing chamber cooling operation, the compressor 12 and the blower fan 22 are driven and stopped in accordance with the temperature of the refrigerating chamber R, but the cooling power of the compressor 12 and the blower fan 22 At least one of the wind speed and the control temperature (eg, the compressor driving temperature and the compressor stopping temperature) may be a different operation.

Hereinafter, the reference cooling operation and the freezing chamber cooling operation are operations in which the cooling power of the compressor 12, the wind speed of the blowing fan 22, and the control temperature (for example, the compressor driving temperature and the compressor stop temperature) are different from each other. Explain.

First, the reference cooling operation will be described.

The reference cooling operation is an operation for driving the compressor 12 and the blowing fan 22 when the refrigerating chamber temperature is equal to or higher than the first compressor driving temperature. The controller 30 may drive the compressor 12 and the cooling fan 22 when the temperature detected by the refrigerating compartment temperature sensor 40 is equal to or higher than the first compressor driving temperature. The controller 30 may control the compressor 12 to a reference cooling force (for example, reference setting cooling force) when the temperature detected by the refrigerating compartment temperature sensor 40 is equal to or higher than the first compressor driving temperature during the reference cooling operation. The blowing fan 22 can be controlled at a reference wind speed (for example, one of high speed, medium speed, and low speed).

The reference cooling force may be a cooling force set lower than the maximum cooling force of the compressor 12. The reference wind speed may be a wind speed input by a user through an input unit (not shown). When the user inputs a high speed, the cooling fan 22 may be controlled in a high speed mode during the reference cooling operation, and the user may perform the medium speed. In the case of inputting, the cooling fan 22 may be controlled in the medium speed mode during the reference cooling operation, and when the user inputs the low speed, the cooling fan 22 may be controlled in the low speed mode during the reference cooling operation.

The reference cooling operation may be an operation of stopping the compressor 12 and the blower fan 22 when the refrigerating chamber temperature is lower than the first compressor driving stop. The controller 30 may stop the compressor 12 and the blower fan 22 when the temperature detected by the refrigerating compartment temperature sensor 40 is equal to or lower than the first compressor stop temperature.

Here, the first compressor driving temperature may be a set temperature (for example, 1 ° C) higher than the refrigerator compartment target temperature, and the first compressor stop temperature is lower than the refrigerator compartment target temperature (for example, 1 ° C). When the target temperature of the refrigerating compartment is 4 ° C., the first compressor driving temperature may be 5 ° C., and the first compressor stop temperature may be 3 ° C. FIG.

When the target temperature of the refrigerating compartment is 4 ° C., when the temperature sensed by the refrigerating compartment temperature sensor 40 rises to 5 ° C. during the reference cooling operation, the refrigerator is set to the reference cooling force (for example, the reference setting cooling force). The blowing fan 22 can be controlled at a reference wind speed (for example, one of high speed, medium speed, and low speed). The refrigerator may stop the compressor 12 and the cooling fan 22 when the temperature sensed by the refrigerating compartment temperature sensor 40 drops to 3 ° C.

Hereinafter, the freezer compartment high temperature cooling operation will be described.

The freezer compartment high temperature cooling operation may be performed after the reference cooling operation, and may be an operation performed when the freezer compartment F is at a high temperature during the reference cooling operation.

This embodiment can assume in advance a number of conditions where the freezer compartment F is high temperature without a freezer compartment temperature sensor that detects the temperature of the freezer compartment F. If satisfied, the control unit 30 may perform a freezer compartment high temperature cooling operation.

One example of the plurality of conditions may be a case in which the evaporator temperature exceeds the first set temperature after the defrosting operation of defrosting the evaporator 11 is completed, and the controller 30 is after the defrosting operation of the defrosting evaporator 11 is completed. If the evaporator temperature exceeds the first set temperature, the freezer compartment high temperature cooling operation can be performed. The controller 30 may perform a defrosting operation of defrosting the evaporator 11 by turning on the defrost heater 50, and after the defrost heater 50 is turned off, the temperature detected by the evaporator temperature sensor 20 may be the first. If the set temperature is exceeded, the freezer compartment F is currently at a high temperature, and thus the freezer compartment high temperature cooling operation can be performed.

Another example of the plurality of conditions may be a case in which the evaporator temperature exceeds the second set temperature after the freezing chamber door 9 opening and closing the freezing compartment F is opened, and the controller 30 switches the door switch 70. By detecting the opening of the freezer compartment 9 by, and if the temperature detected by the evaporator temperature sensor 20 after the freezer compartment 9 is opened exceeds the second set temperature, the current freezer compartment (F) is a high temperature Therefore, the reference cooling operation may be stopped and the freezer compartment high temperature cooling operation may be performed.

When the user opens the freezer compartment 9 and injects a new high temperature load into the freezer compartment F, each of the temperature of the freezer compartment and the temperature of the evaporator 11 may be increased, and the control unit 30 may control the freezer compartment 9. The freezer compartment high-temperature cooling operation can be performed by opening or by increasing the temperature of the evaporator 11.

Another example of the plurality of conditions may be a case in which the freezing chamber door 9 is kept open for more than an open set time (for example, 1 minute), and the control unit 30 is switched by the door switch 70. The opening of the freezer door 9 may be detected, and the time after the freezer door 9 is opened may be counted by the timer 70, and the control unit 30 may control the freezer door 9 after the freezer door 9 is opened. If the time counted by the timer 70 is equal to or greater than the open set time, since the freezer compartment F is currently high temperature, the reference cooling operation may be stopped and the freezer compartment high temperature cooling operation may be performed.

The control unit 30 can perform the freezer compartment high temperature cooling operation if one of the above conditions is satisfied.

The freezer compartment high temperature cooling operation may be an operation of driving the compressor 12 at a set low cooling power and rotating the cooling fan at a low speed when the refrigerating chamber temperature is higher than or equal to the second compressor driving temperature. If any one of the plurality of conditions is satisfied and the temperature detected by the refrigerating compartment temperature sensor 40 is greater than or equal to the second compressor driving temperature, the controller 30 drives the compressor 12 at a set low cooling power and cools it. The fan 22 can be rotated at low speed.

Here, the set low cooling force may be a cooling force set lower than the maximum cooling force of the compressor 12, or may be a cold force during a freezer compartment high temperature cooling operation.

In addition, the cooling fan 22 may be rotated at the same or the same as the wind speed of the reference cooling operation, and may be rotated at a low speed regardless of the wind speed of the reference cooling operation. Even when the user inputs a high speed or a medium speed through the input unit, the controller 30 may rotate the cooling fan 22 at a low speed during the freezer compartment high temperature cooling operation.

Here, the second compressor driving temperature may be a temperature set equal to the first compressor driving temperature, or may be a temperature set lower than the first compressor driving temperature by a predetermined temperature. When the second compressor driving temperature is the same as the first compressor driving temperature, the second compressor driving temperature may be a set temperature (eg, 1 ° C.) higher than the target temperature of the refrigerating chamber.

The freezer compartment high temperature cooling operation may be an operation of stopping the compressor 12 and the blower fan 22 when the refrigerating chamber temperature is lower than the second compressor driving stop. The controller 30 may stop the compressor 12 and the blower fan 22 when the temperature sensed by the refrigerating compartment temperature sensor 40 is lower than or equal to the second compressor stop temperature.

The second compressor stop temperature may be a temperature set lower than the first compressor stop temperature by a set temperature (eg, 2 ° C.). If the refrigerating chamber target temperature is 4 ° C., the first compressor stop temperature may be 3 ° C., and the second compressor stop temperature may be 1 ° C.

As described above, when the second compressor stop temperature is set lower than the first compressor stop temperature, the compressor continuous drive time until the compressor 12 is stopped after the compressor 12 is driven in the freezer compartment high temperature cooling operation (HT, see FIG. 6). Can be increased, and while the freezer compartment F is continuously cooled during the compressor continuous driving time HT, the load of the freezer compartment F can be released.

The freezer compartment high temperature cooling operation may be performed by alternately driving the compressor 12 and the cooling fan 22 and stopping the compressor 12 and the cooling fan 22, and such a freezer compartment high temperature cooling operation may be performed for a predetermined time (eg, For example, 4 hours, 5 hours, 6 hours, etc.) may be finished.

The compressor 12 and the cooling fan 22 may be driven and stopped a plurality of times during the set time, and the set time may be different for each start condition of the freezer compartment high temperature cooling operation.

For example, the freezer compartment high temperature cooling operation performed when the evaporator temperature exceeds the first set temperature after the defrosting operation of defrosting the evaporator 11 is completed may be finished after being performed for a set time of 4 hours, and the freezer compartment ( F) The freezer compartment high temperature cooling operation performed when the evaporator temperature exceeds the second set temperature after the freezer door 9 to open and close may be finished after being performed for a set time of 5 hours, and the freezer door 9 The freezer compartment high temperature cooling operation, which is performed when the time that is kept open) is more than the open set time, may be terminated after the set time which is 6 hours.

In this embodiment, of course, it is also possible to set the same set time for each start condition of the freezer compartment high temperature cooling operation.

The control unit 30 may terminate the freezer compartment high temperature cooling operation as described above for a set time and then perform the standard cooling operation again, and if the start condition of the freezer compartment high temperature cooling operation is satisfied again during the reference cooling operation. New freezer high temperature cooling operation can be performed. That is, the controller 30 may alternately perform the standard cooling operation and the freezer compartment high temperature cooling operation.

4 is a flowchart illustrating a method of operating a refrigerator according to an embodiment of the present invention.

In the operation method of the refrigerator according to the present embodiment, the reference cooling step S1 and the freezer compartment high temperature cooling steps S2 to S9 may be sequentially performed.

In the reference cooling step S1, when the temperature sensed by the refrigerating compartment temperature sensor 40 is equal to or greater than the first compressor driving temperature, the reference cooling step is driven while the compressor 12 is driven at the reference cooling force and the cooling fan 22 is rotated at the reference wind speed. When the temperature sensed by the refrigerating compartment temperature sensor 40 is equal to or lower than the first compressor stop temperature, the compressor 12 and the cooling fan 22 may be stopped.

In the reference cooling step S1, the compressor 12 and the cooling fan 22 may repeat driving and stopping thereof, and the temperature of the refrigerating chamber R is lowered to the first compressor driving temperature and then the first compressor stopping temperature. It may be repeated to increase, and when cooling the refrigerating compartment (R) as described above, the load temperature of the freezing compartment (F) may be lowered and then increased.

During the above-mentioned reference cooling step S1, the refrigerator may be defrosted, and after the freezer door 9 is opened, a new new load may be introduced into the freezer compartment F, and the freezer compartment door may be used. (9) can be opened for a long time (for example, 1 minute) or more, in this case, the freezer compartment (F) may be a high temperature situation, the operation method of the refrigerator is a reference cooling step (S1) that is being carried out After the completion, the freezer compartment high temperature cooling step (S2 ~ S9) can be carried out.

An example of the freezer compartment high temperature cooling step may be performed when the evaporator temperature exceeds the first set temperature after the defrosting operation of defrosting the evaporator is completed.

The refrigerator may be on and off of the defrost heater 50 by the defrosting operation, and the temperature of the evaporator 11 may be greater than the first preset temperature Td. An example of the freezer compartment high temperature cooling step may be performed when the defrost heater 50 is changed from the on state to the off state as described above, and the temperature of the evaporator 11 at that time is the first set temperature Td. S2) (S3) The freezer compartment high temperature cooling step may be a freezer compartment high temperature cooling step after defrosting.

After defrosting the freezer compartment high temperature cooling step (S2) (S3) (S4), if the temperature detected by the refrigerating compartment temperature sensor 20 is equal to or higher than the second compressor driving temperature, the compressor is driven at a set low cooling power (low cooling force A). When the cooling fan 22 can be rotated at a low speed (low speed A), and the temperature detected by the refrigerating chamber temperature sensor 20 is equal to or lower than the second compressor stop temperature (temperature A), the compressor 12 and the cooling fan 22 ) Can be stopped (S3).

After the defrosting, the freezer compartment high temperature cooling step may be finished after the first set time A. (S4)

Another example of the freezer compartment high temperature cooling step may be performed when the evaporator 11 temperature exceeds the second set temperature Tr after the freezer compartment 9 that opens and closes the freezer compartment F is opened. The refrigerator may open the freezer compartment 9, a new new load may be introduced into the freezer compartment F, and the freezer compartment F may be heated by the new new load, in which case the temperature of the evaporator 11 may be increased. It may rise to a temperature exceeding the set temperature (Tr). Another example of the freezer compartment high temperature cooling step may be performed when the temperature of the evaporator 11 after opening of the freezer compartment door 9 is greater than the second set temperature Tr as described above (S5) (S6).

In the freezer compartment high temperature cooling step according to the new load of the freezer compartment, if the temperature detected by the refrigerating compartment temperature sensor 20 is equal to or higher than the second compressor driving temperature, the compressor is driven at a predetermined low cooling power (low cooling force B) and the cooling fan 22 ) Can be rotated at a low speed (low speed B), and the compressor 12 and the cooling fan 22 can be stopped if the temperature detected by the refrigerating chamber temperature sensor 20 is equal to or lower than the second compressor stop temperature (temperature B). (S6)

The freezer compartment high temperature cooling step after the input of the new load as described above may be finished after the second set time B. (S7)

Another example of the freezer compartment high temperature cooling step may be performed when the freezer door 9 that opens and closes the freezer compartment F is kept open for more than the open set time To (S8). The door 9 may be opened for more than the open set time To. In this case, the freezer compartment F may be heated to a high temperature due to the long opening of the freezer compartment door 9. In the freezer compartment high temperature cooling step according to the long opening of the freezer door, when the temperature sensed by the refrigerating compartment temperature sensor 20 is equal to or higher than the second compressor driving temperature, the compressor is driven at a set low cooling power (low cooling force C) and the cooling fan 22 ) Can be rotated at a low speed (low speed C), and the compressor 12 and the cooling fan 22 can be stopped if the temperature detected by the refrigerator compartment temperature sensor 20 is equal to or lower than the second compressor stop temperature (temperature C). (S9)

The freezer compartment high temperature cooling step according to the long opening of the freezer compartment door as described above may be finished after the third set time (C).

In the freezer compartment high temperature cooling step, the second compressor stop temperature (temperature A, temperature B, temperature C) may be set lower than the first compressor stop temperature of the reference cooling step.

The freezer compartment high temperature cooling step may be performed if any one of the above conditions is satisfied, and after the defrosting operation of defrosting the evaporator 11 is completed, the evaporator temperature is above the first set temperature Td or the freezer compartment ( F) After the freezer door 9 that opens and closes is opened, the evaporator temperature may be greater than the second set temperature Tr, or when the freezer door is kept open for more than the open set time.

In the freezer compartment high temperature cooling step, the set low cooling power (low cooling power A, low cooling power B, low cooling power C) of the compressor 12 may be set identical to each of the starting conditions, or may be set differently from each other.

In the freezer compartment high temperature cooling step, the low speeds (low speed A, low speed B, low speed C) of the cooling fan 22 may be set identically to each start condition, or may be set differently from each other.

In the freezer compartment high temperature cooling step, the second compressor stop temperature (temperature A, temperature B, temperature C) may be set identically to each start condition, or may be set differently from each other.

In the freezer compartment high temperature cooling step, the set time (A, B, C) may be set identical to each start condition, or may be set differently from each other.

That is, in the freezer compartment high temperature cooling step, at least one of a low cooling power of the compressor 12, a low speed of the cooling fan 22, a stop temperature of the second compressor, and a setting time may be set differently for each start condition.

The freezer compartment high temperature cooling step may be terminated after being performed for a predetermined time (A, B, C), and after the freezer compartment high temperature cooling steps (S2 to S9), the reference cooling step (S1) may be performed again. .

5 is a view showing a variation of the compressor control and the freezer compartment load of the comparative example compared to the embodiment of the present invention, Figure 6 is a view showing a variation of the compressor control and the freezer compartment load according to an embodiment of the present invention.

In the comparative example shown in FIG. 5, in the freezer compartment high temperature cooling step as in the embodiment of the present invention, the compressor 12 is driven at the maximum cooling force (TDC, for example, 54.2W), and the cooling fan 22 is driven at a high speed. FIG. 6 is a diagram showing a variation of the freezer compartment load when rotated, and FIG. 6 drives the compressor 12 to a set low refrigeration force (Tset, for example, 46.5 W) lower than the maximum cold force during the freezer compartment high temperature cooling step, and The figure which shows the fluctuation | variation of the freezer compartment load when rotating the fan 22 at low speed is shown.

Referring to FIG. 5, the freezer load of the comparative example may be confirmed to be −18 ° C. after 4 hours of rising to −18 ° C., and the freezer load of the embodiment of the present invention may be referred to as −18 ° C. FIG. 6. 4 hours after being raised, it can be confirmed that it is -18.7 ° C.

That is, as in the present embodiment, when the freezer compartment high temperature cooling, the compressor 12 is driven at a set low cooling force, and the cooling fan 22 is rotated at a low speed, the temperature of the freezer compartment load is 0.7 ° C lower than in the comparative example It can be confirmed, and the freezer load of this embodiment can be confirmed that the faster resolved in the case of the comparative example.

As in the present embodiment, when the compressor 12 is driven at a set low cooling power and the cooling fan 22 is rotated at a low speed, the continuous driving time HT of the compressor 12 is longer than that of the comparative example, and the freezing chamber ( F) is the result of being continuously cooled during the continuous driving time (HT).

The above description is merely illustrative of the technical idea of the present invention, and those skilled in the art to which the present invention pertains may make various modifications and changes without departing from the essential characteristics of the present invention.

Therefore, the embodiments disclosed in the present invention are not intended to limit the technical idea of the present invention but to describe the present invention, and the scope of the technical idea of the present invention is not limited by these embodiments.

The protection scope of the present invention should be interpreted by the following claims, and all technical ideas within the equivalent scope should be interpreted as being included in the scope of the present invention.

1: cabinet 11: evaporator
12 compressor 20 refrigeration chamber temperature sensor
22: cooling fan 100: control unit

Claims (10)

A cabinet in which a freezing compartment and a refrigerating compartment are formed and a heat exchange chamber communicating with each of the freezing compartment and the refrigerating compartment is formed;
An evaporator disposed in the heat exchange chamber;
A compressor connected to the evaporator and compressing a refrigerant;
A cooling fan disposed in the heat exchange chamber and configured to blow cold air cooled by the evaporator to a freezing compartment and a refrigerating compartment;
A refrigerator compartment temperature sensor detecting a temperature of the refrigerator compartment;
If the temperature detected by the refrigerating compartment temperature sensor is greater than or equal to the first compressor driving temperature, the compressor and the cooling fan are driven. When the temperature detected by the refrigerating compartment temperature sensor is less than or equal to the first compressor stop temperature, the compressor and the cooling fan are stopped. Including a control unit for performing a standard cooling operation to
After the reference cooling operation, if the temperature detected by the refrigerator compartment temperature sensor is greater than or equal to the second compressor driving temperature, the controller drives the compressor at a set low cooling power, rotates the cooling fan at a low speed, and stores the refrigerator compartment temperature sensor. And a freezer compartment high temperature cooling operation for stopping the compressor and the cooling fan when the detected temperature is lower than the second compressor stop temperature. The method of claim 1,
The control unit is a method of operating a refrigerator to stop the compressor and the cooling fan when the temperature detected by the refrigerating compartment temperature sensor at a freezer compartment high temperature cooling operation is less than or equal to the second compressor stop temperature set lower than the first compressor stop temperature by a set temperature. . The method of claim 1,
And the control unit performs the freezer compartment high temperature cooling operation when the evaporator temperature exceeds the first set temperature after the defrosting operation of defrosting the evaporator is completed. The method of claim 1,
And the control unit performs the freezer compartment high temperature cooling operation when the evaporator temperature exceeds the second preset temperature after the freezer compartment door that opens and closes the freezer compartment. The method of claim 1,
The control unit performs the freezer compartment high temperature cooling operation when the freezer door is kept open for more than an open set time. The method of claim 1,
The control unit is terminated after performing the freezer compartment high temperature cooling operation for a set time, and performs the reference cooling operation. If the temperature detected by the refrigerating compartment temperature sensor is equal to or higher than the first compressor driving temperature, the compressor is driven at a reference cooling force and the cooling fan is rotated at the reference wind speed. A reference cooling step of stopping the compressor and the cooling fan;
After the reference cooling step, if the temperature detected by the refrigerating compartment temperature sensor is equal to or higher than the second compressor driving temperature, the compressor is driven at a predetermined low cooling force, the cooling fan is rotated at a low speed, and detected by the refrigerating compartment temperature sensor. And a freezer compartment high temperature cooling step of stopping the compressor and the cooling fan when the temperature is lower than the second compressor stop temperature. The method of claim 7, wherein
And the second compressor stop temperature is set to be lower than a set temperature of the first compressor stop temperature. The method of claim 6,
In the freezer compartment high temperature cooling step, the evaporator temperature exceeds a first set temperature after the defrosting operation of defrosting the evaporator is completed, or the evaporator temperature exceeds a second set temperature after the freezing chamber door for opening and closing the freezer compartment is opened, or The operation method of the refrigerator carried out when the freezer door is kept open for more than the open set time. The method of claim 1,
The freezer compartment high temperature cooling step is carried out for a set time and then terminated,
And the reference cooling step is performed after the freezing chamber high temperature cooling step.

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