KR102435205B1 - Control apparuatus of refrigerator - Google Patents

Abstract

The 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 and refrigerating compartments is formed; 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 into the freezing chamber and the refrigerating chamber; a refrigerating compartment temperature sensor for sensing a temperature of the refrigerating compartment; When the temperature detected by the refrigerating compartment temperature sensor is equal to or higher than the first compressor driving temperature, the compressor and the cooling fan are driven, and when the temperature detected by the refrigerating compartment temperature sensor is below the first compressor stop temperature, the compressor and the cooling fan are stopped. and a control unit for performing the following operation, wherein 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 compressor is driven at a set low cooling power, the cooling fan is rotated at a low speed, and the refrigerating compartment When the temperature sensed by the temperature sensor is below the second compressor stop temperature, a high-temperature cooling operation of the freezing chamber is performed to stop the compressor and the cooling fan, and the temperature of the refrigerating chamber and the temperature of the freezing chamber can be lowered slowly during the high-temperature cooling operation of the freezing chamber. , by increasing the time during which the compressor is continuously driven, it is possible to prevent the compressor from being stopped due to the temperature of the refrigerating compartment in a state in which the load in the freezer compartment is not sufficiently relieved, and the compressor can be stopped in a state in which the load in the freezer compartment is sufficiently relieved.

Description

Control apparatus of refrigerator {Control apparuatus of refrigerator}

The present invention relates to a refrigerator, and more particularly, to a refrigerator that controls a compressor and a cooling fan according to a temperature of a refrigerating chamber.

Refrigerator is a device that cools objects to be cooled (hereinafter referred to as food) such as food, drugs, cosmetics, etc. or stores them at a low temperature to prevent spoilage and deterioration.

The refrigerator includes a cabinet having a freezer compartment and a refrigerating compartment formed therein, a freezer compartment door connected to the cabinet to open and close the freezer compartment, a refrigerating compartment door connected to the cabinet to open and close the refrigerating compartment, and a refrigeration cycle device for cooling the freezing compartment and the refrigerating compartment.

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

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

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

As described above, an example of a refrigerator that controls a compressor and a cooling fan based on the temperature of the refrigerating compartment is disclosed in Korean Patent Application Laid-Open No. 2000-0028515 A (published on May 25, 2000), and such a refrigerator is located near the refrigerator. As the temperature decreases in response to a change in temperature, the off-control temperature of the compressor and blower fan, which are the main control targets for generating cool air, is set to be gradually lower from the reference temperature to control the temperature rise in the freezer and refrigerating chambers even when the ambient temperature is low. In addition, by reducing the number of parts, the manufacturing cost can be lowered and power consumption can also be reduced.

However, in the refrigerator according to the prior art, the off-control temperature of the compressor and the blower fan is determined using the ambient temperature as a factor. There are problems in that the time the compressor is off is long and the time that the freezer compartment is maintained at a high temperature increases.

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

An object of the present invention is to provide a refrigerator and an operating method thereof, which can quickly respond to a change in load in the freezing compartment by controlling the compressor and the fan to increase the time the compressor is maintained during high-temperature cooling of the freezer compartment.

A refrigerator according to an embodiment of the present invention 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 and refrigerating compartments is formed; 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 into the freezing chamber and the refrigerating chamber; a refrigerating compartment temperature sensor for sensing a temperature of the refrigerating compartment; When the temperature detected by the refrigerating compartment temperature sensor is equal to or higher than the first compressor driving temperature, the compressor and the cooling fan are driven, and when the temperature detected by the refrigerating compartment temperature sensor is below the first compressor stop temperature, the compressor and the cooling fan are stopped. and a control unit for performing the following operation, wherein 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 compressor is driven at a set low cooling power, the cooling fan is rotated at a low speed, and the refrigerating compartment When the temperature sensed by the temperature sensor is below the second compressor stop temperature, a high-temperature cooling operation of the freezer compartment is performed to stop the compressor and the cooling fan.

The controller may stop the compressor and the cooling fan when the temperature detected by the refrigerating compartment temperature sensor during the high-temperature cooling operation of the freezing compartment is less than or equal to the second compressor stop temperature set lower than the first compressor stop temperature by a preset temperature.

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

When the evaporator temperature exceeds the second set temperature after the freezer compartment door for opening and closing the freezing compartment is opened, the control unit may perform a high temperature cooling operation of the freezing compartment.

The control unit may perform a high-temperature cooling operation of the freezer compartment when the time during which the freezer door is kept open is equal to or longer than a set open time.

The control unit may perform the high-temperature cooling operation of the freezer compartment for a set time and then terminate it, and perform the reference cooling operation.

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

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

In the freezer compartment high-temperature cooling step, when 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 set low cooling power and the cooling fan is rotated at a low speed, and the temperature detected by the refrigerating compartment temperature sensor is determined by the second compressor. If it is below the stop temperature, it includes a high-temperature cooling step of the freezer compartment for stopping the compressor and the cooling fan.

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

In the high-temperature cooling step of the freezer, the temperature of the evaporator exceeds the first set temperature after the defrosting operation of defrosting the evaporator is completed, or the temperature of the evaporator exceeds the second set temperature after the freezer door that opens and closes the freezing chamber is opened, or the freezer door is kept open If the set time is longer than the open set time, it can be implemented.

The freezing chamber high-temperature cooling step may be completed after being carried out for a set time, and the reference cooling step may be performed after the freezing chamber high-temperature cooling step.

According to an embodiment of the present invention, when the freezer compartment is cooled at a high temperature, the compressor is driven with a set low cooling power and the cooling fan is rotated at a low speed so that the temperature of the refrigerating compartment and the temperature of the freezing compartment can be decreased slowly, and the compressor is continuously driven By increasing the time required, the compressor may not be stopped by the refrigerating compartment temperature in a state in which the load in the freezing compartment is not sufficiently relieved, and the compressor may be stopped in a state in which the load in the freezing compartment is sufficiently relieved.

In addition, without a freezing chamber temperature sensor, when the freezing chamber is in a high temperature condition, the stop time of the compressor and the fan can be delayed, and the load of the freezing chamber can be quickly relieved by allowing the freezing chamber to be cooled for as long as possible.

In addition, the compressor stop temperature at the time of high-temperature cooling of the freezer compartment is set lower than the compressor stop temperature at the time of the reference cooling, so that the time during which the compressor is continuously driven and the time during which the freezing compartment is kept cool can be maximally increased during high-temperature cooling of the freezing compartment. load can be more efficiently removed.

1 is a view showing a refrigeration cycle device of a refrigerator according to an embodiment of the present invention;
2 is a longitudinal cross-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 diagram showing the change of the compressor control and load of the comparative example compared with the embodiment of the present invention,
6 is a diagram illustrating a change in 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 drawings.

1 is a diagram illustrating a refrigeration cycle apparatus of a refrigerator according to an embodiment of the present invention, FIG. 2 is a longitudinal cross-sectional view illustrating a refrigerator according to an embodiment of the present invention, and FIG. 3 is a refrigerator according to an embodiment of the present invention is a control block diagram of

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 that partitions the freezing compartment F and the refrigerating compartment R. The cabinet 1 includes an outer case 3 forming the exterior of the refrigerator, a freezer compartment inner case 4 disposed inside the outer case 3 and having a freezer compartment F formed therein, and the outer case 2 . It is disposed on the inside and may include a refrigerating compartment inner case 5 having a refrigerating compartment R formed therein.

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

The inner duct 6 is arranged inside the freezing compartment inner case 4 to divide the inside of the freezing compartment inner case 4 into a freezing chamber F and a heat exchange chamber H, and the inner duct 6 is heat-exchanged. A cold air outlet 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 refrigerating chamber duct 8 for guiding the cold air cooled in the heat exchange chamber H to the refrigerating chamber R.

The inner duct 6 is disposed inside the refrigerating compartment inner case 5 to divide the inside of the refrigerating compartment inner case 5 into a refrigerating compartment R and a heat exchange chamber H, and heat exchange is provided in the inner duct 6 . A cold air outlet 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 refrigerating chamber duct (not shown) for guiding the cold air cooled in the heat exchange chamber H to the freezing chamber F.

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

The refrigerator may further include an evaporator 11 that cools the surroundings while the refrigerant passes. The evaporator 11 may be disposed 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 device 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 . A compressor discharge tube 14 through which the refrigerant compressed in the compressor 12 is discharged may be connected to the compressor 12 .

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

The refrigerator may further include a condensing 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 flows into the evaporator 11 and evaporates 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 cold air cooled by the evaporator 11 to the freezing chamber F and the refrigerating chamber R.

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

The refrigerator may further include a controller 30 for controlling 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, and for this purpose, may include a refrigerating compartment temperature sensor 40 that detects the temperature of the refrigerating compartment R .

The controller 30 drives the compressor 12 when the temperature detected by the refrigerating compartment temperature sensor 40 is equal to or greater than the compressor driving temperature, and operates the compressor 12 when the temperature sensed by the refrigerating compartment temperature sensor 40 is equal to or less than the compressor stop temperature. ) can be stopped.

The refrigerator does not include a freezer compartment temperature sensor (not shown) that detects the temperature of the freezing compartment F, and the control unit 30 controls the cooling power of the compressor 12 and the cooling fan 22 in order to solve the load fluctuation of the freezing compartment. Each wind speed 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 controller 30 , and may count various times such as the time when the freezer compartment door 9 is opened.

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

The controller 30 controls the compressor 12 and the cooling fan 22 based on the temperature of the refrigerating compartment R, but in a situation in which a sudden temperature rise of the freezing compartment occurs, the cooling power (power consumption) of the compressor 12 . can be variably controlled for high-temperature cooling of the freezer compartment.

The control unit 30 may perform a standard cooling operation and a high-temperature cooling operation of the freezer compartment.

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 chamber F is not at a high temperature.

In addition, the high-temperature cooling-on-freeze chamber may be a special operation for controlling the compressor 12 and the cooling fan 22 in a state in which the freezing chamber F is at a high temperature.

The control unit 30 may selectively perform the reference cooling operation and the freezing chamber high temperature cooling operation without performing both the reference cooling operation and the freezing chamber high temperature cooling operation.

In the middle of the reference cooling operation, when the freezing chamber F is in a high temperature state, the control unit 30 terminates the reference cooling operation, can perform the freezing chamber high temperature cooling operation, and when the freezing chamber high temperature cooling operation ends, the reference cooling again driving can be carried out. The control unit 30 may alternately perform the reference cooling operation and the freezing chamber high temperature cooling operation.

The standard cooling operation and the freezing chamber cooling operation are the same in that the compressor 12 and the blowing fan 22 are driven and stopped according to the temperature of the refrigerating compartment R, but the cooling power of the compressor 12 and the blowing fan 22 are At least one of a wind speed and a control temperature (eg, a compressor driving temperature and a 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 blower fan 22, and the control temperature (eg, the compressor driving temperature and the compressor stopping temperature) are different, for example. Explain.

First, the reference cooling operation will be described as follows.

The reference cooling operation is an operation of respectively 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 sensed by the refrigerating compartment temperature sensor 40 is equal to or greater than the first compressor driving temperature. When the temperature sensed by the refrigerating compartment temperature sensor 40 is equal to or greater than the first compressor driving temperature during the reference cooling operation, the control unit 30 may control the compressor 12 to the reference cooling power (eg, the reference set cooling power). , the blowing fan 22 may be controlled at a reference wind speed (eg, any one of high speed, medium speed, and low speed).

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

In addition, the reference cooling operation may be an operation in which the compressor 12 and the blowing fan 22 are respectively stopped when the refrigerating chamber temperature is equal to or less than the first compressor operation stop. When the temperature detected by the refrigerating compartment temperature sensor 40 is equal to or less than the first compressor stop temperature, the controller 30 may stop the compressor 12 and the blowing fan 22, respectively.

Here, the first compressor driving temperature may be a set temperature (eg, 1°C) higher than the refrigerating compartment target temperature, and the first compressor stopping temperature may be set lower than the refrigerating compartment target temperature (eg, 1°C). It may be a set temperature, and when the target temperature of the refrigerating compartment is 4°C, the first compressor driving temperature may be 5°C, and the first compressor stopping temperature may be 3°C.

When the target temperature of the refrigerating compartment is 4°C, when the temperature detected by the refrigerating compartment temperature sensor 40 rises to 5°C during the reference cooling operation, the refrigerator sets the compressor 12 to the reference cooling capacity (eg, the reference cooling capacity). can be controlled, and the blower fan 22 can be controlled at a reference wind speed (eg, any one of high speed, medium speed, and low speed). In addition, 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 high-temperature cooling operation of the freezer compartment will be described as follows.

The freezing chamber high temperature cooling operation may be performed after the reference cooling operation, and may be an operation performed during the reference cooling operation, when the freezing chamber F is in a high temperature situation.

In this embodiment, without a freezing chamber temperature sensor sensing the temperature of the freezing chamber (F), it is possible to assume in advance a plurality of conditions in which the freezing chamber (F) is high temperature, any one of the plurality of conditions in which the freezing chamber (F) is high temperature If satisfied, the control unit 30 may perform a high-temperature cooling operation of the freezer compartment.

One example of the plurality of conditions may be a case where the temperature of the evaporator exceeds the first set temperature after the defrosting operation for defrosting the evaporator 11 is completed, and the control unit 30 after the defrosting operation for defrosting the evaporator 11 is completed If the evaporator temperature exceeds the first set temperature, a high-temperature cooling operation of the freezer may be performed. The control unit 30 may turn on the defrost heater 50 to perform a defrost operation to defrost the evaporator 11 , and after the defrost heater 50 is turned off, the temperature sensed by the evaporator temperature sensor 20 is the first If the set temperature is exceeded, since the current freezing chamber F is high, a high-temperature cooling operation of the freezing chamber 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 compartment door 9 for opening and closing the freezing compartment F is opened, and the control unit 30 controls the switching of the door switch 70 . can detect the opening of the freezer compartment door 9 by the Therefore, it is possible to stop the standard cooling operation and perform the high-temperature cooling operation of the freezer compartment.

When the user opens the freezer compartment door 9 and puts a new high-temperature load into the freezing compartment F, the temperature of the freezing compartment and the temperature of the evaporator 11 may each increase, and the controller 30 controls the freezing compartment door 9. The high-temperature cooling operation of the freezer compartment can be performed by whether or not the evaporator is open and the temperature rise of the evaporator 11 .

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

The control unit 30 may perform a high-temperature cooling operation of the freezer compartment when even one of the plurality of conditions is satisfied.

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

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

In addition, the cooling fan 22 may be rotated at the same or equal to the wind speed of the reference cooling operation, and may be rotated at a low wind 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 control unit 30 may rotate the cooling fan 22 at a low speed during the high-temperature cooling operation of the freezer compartment.

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

In addition, the high-temperature cooling operation of the freezing compartment may be an operation of stopping the compressor 12 and the blowing fan 22, respectively, when the temperature of the refrigerating compartment is equal to or less than the operation stop of the second compressor. When the temperature detected by the refrigerating compartment temperature sensor 40 is equal to or less than the second compressor stop temperature, the controller 30 may stop the compressor 12 and the blowing fan 22, respectively.

The second compressor stop temperature may be a temperature set lower than the first compressor stop temperature by a set temperature (eg, 2° C.). When the target temperature of the refrigerating compartment 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 to be lower than the first compressor stop temperature, the continuous compressor operation time until the compressor 12 is driven and stopped during the high-temperature cooling operation of the freezer compartment (HT, see FIG. 6 ) can be increased, and while the freezing chamber (F) is continuously cooled during the continuous compressor operation time (HT), the load on the freezing chamber (F) can be relieved.

In the high-temperature cooling operation of the freezer compartment, the driving of the compressor 12 and the cooling fan 22 and the stopping of the compressor 12 and the cooling fan 22 may be alternately performed. For example, 4 hours, 5 hours, 6 hours, etc.) may be executed and then ended.

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

For example, after the defrosting operation of defrosting the evaporator 11 is completed, the high-temperature cooling operation of the freezing chamber performed when the temperature of the evaporator exceeds the first set temperature may be completed after being carried out for a set time of 4 hours, and the freezing chamber ( F) The high-temperature cooling operation of the freezer, which is carried out when the temperature of the evaporator exceeds the second set temperature after the freezer door 9 for opening and closing is opened, can be completed after being carried out for a set time of 5 hours, and then ended, and the freezer door 9 ), the high-temperature cooling operation of the freezer performed when the time kept open is longer than the set open time may be completed after being carried out for the set time of 6 hours.

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

The control unit 30 may end the high-temperature cooling operation of the freezer as described above for a set time, and may perform the reference cooling operation again, and after that, the start condition of the high-temperature cooling operation of the freezer during the reference cooling operation is satisfied again. , a new freezer compartment high-temperature cooling operation can be performed. That is, the control unit 30 may alternately perform the reference cooling operation and the freezing chamber 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 operating method of the refrigerator according to the present embodiment, the reference cooling step (S1) and the high-temperature cooling step (S2 to S9) of the freezer may be sequentially performed.

In the reference cooling step (S1), when the temperature detected by the refrigerating compartment temperature sensor 40 is equal to or higher than the first compressor driving temperature, the compressor 12 is driven by the reference cooling power and the cooling fan 22 is rotated at the reference wind speed, When the temperature detected by the refrigerating compartment temperature sensor 40 is equal to or less than the first compressor stop temperature, the compressor 12 and the cooling fan 22 may be stopped. (S1)

During the reference cooling step (S1), the compressor 12 and the cooling fan 22 can repeat their driving and stopping, and the temperature of the refrigerating compartment R is lowered to the first compressor driving temperature and then the first compressor stopping temperature. may be repeated, and when the refrigerating compartment R is cooled as described above, the load temperature of the freezing compartment F may be repeatedly decreased and then increased.

In the middle of the standard cooling step (S1) as described above, the refrigerator can be defrosted, and after the freezer door 9 is opened, a new load can be put into the freezing room F, and the freezer door (9) is possible to be opened for a long time (for example, 1 minute) or longer, in this case, the freezing chamber (F) may be a high temperature situation, and the operation method of the refrigerator is the standard cooling step (S1) being carried out. End, the high temperature cooling step of the freezer (S2 ~ S9) may be carried out.

An example of the freezing chamber high-temperature cooling step may be carried out when the temperature of the evaporator exceeds the first set temperature after the defrosting operation of defrosting the evaporator is completed.

In the refrigerator, the defrost heater 50 may be turned on and off due to the implementation of the defrosting operation, and the temperature of the evaporator 11 may exceed the first set temperature Td. An example of the high-temperature cooling step of the freezer is as described above, when the defrost heater 50 is changed from the on state to the off state, and the temperature of the evaporator 11 at that time is the first set temperature Td. ( S2) (S3) This high-temperature cooling step of the freezer may be a high-temperature cooling step of the freezer after defrosting.

After defrosting, the high-temperature cooling steps (S2) (S3) and (S4) of the freezer compartment are when the temperature detected by the refrigerator compartment temperature sensor 20 is equal to or greater than the second compressor driving temperature, the compressor is driven with a set low cooling power (low cooling power A) and , the cooling fan 22 can be rotated at a low speed (low speed A), and when the temperature sensed by the refrigerating compartment temperature sensor 20 is equal to or less than the second compressor stop temperature (temperature A), the compressor 12 and the cooling fan 22 ) can be stopped. (S3)

The high-temperature cooling step of the freezer compartment after the defrost as described above may be completed after being carried out for the first set time (A). (S4)

Another example of the freezing chamber high-temperature cooling step may be carried out when the temperature of the evaporator 11 exceeds the second set temperature Tr after the freezing chamber door 9 for opening and closing the freezing chamber F is opened. In the refrigerator, the freezer compartment door 9 is opened, a new load can be put into the freezer compartment F, and the freezer compartment F can be heated by the new load. In this case, the temperature of the evaporator 11 is the second It may be increased to a temperature exceeding the set temperature (Tr). Another example of the freezing chamber high-temperature cooling step may be carried out when the temperature of the evaporator 11 after opening the freezing chamber door 9 is greater than the second set temperature Tr, as described above. (S5) (S6)

In the high-temperature cooling step of the freezer compartment according to the input of a new load in the freezer compartment, when 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 with the set low cooling power (low cooling power B) and the cooling fan 22 ) can be rotated at a low speed (low speed B), and when the temperature sensed by the refrigerating compartment temperature sensor 20 is less than or equal to the second compressor stop temperature (temperature B), the compressor 12 and the cooling fan 22 can be stopped. There is (S6)

The high-temperature cooling step of the freezer compartment after the input of the new load as described above may be performed for the second set time (B) and then ended. (S7)

Another example of the freezing chamber high-temperature cooling step may be carried out when the time the freezing chamber door 9 for opening and closing the freezing chamber F is kept open is longer than the open set time To. (S8) (S9) The refrigerator is a freezer compartment It is possible for the door 9 to be opened for more than the set open time To, and in this case, the temperature of the freezing compartment F may be raised to a high temperature due to the long-time opening of the freezing compartment door 9 . In the high-temperature cooling step of the freezer compartment following the opening of the freezer compartment door for a long time, when the temperature detected by the refrigerator compartment temperature sensor 20 is equal to or higher than the second compressor driving temperature, the compressor is driven with a set low cooling power (low cooling power C), and the cooling fan 22 ) can be rotated at a low speed (low speed C), and when the temperature detected by the refrigerating compartment temperature sensor 20 is less than or equal to the second compressor stop temperature (temperature C), the compressor 12 and the cooling fan 22 can be stopped. There is (S9)

The high-temperature cooling step of the freezer compartment according to the long-time opening of the freezer door as described above may be completed after being carried out for the third set time (C). (S10)

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

The high-temperature cooling step of the freezer compartment can be carried out if at least one of the multiple conditions as described above is satisfied, and after the defrosting operation for defrosting the evaporator 11 is completed, the evaporator temperature exceeds the first set temperature (Td), or the freezing chamber ( F) after the freezer compartment door 9 for opening and closing is opened, the evaporator temperature exceeds the second set temperature Tr, or the time the freezer compartment door is kept open is longer than the open set time.

In the freezing chamber high-temperature cooling step, the set low cooling powers (low cooling power A, low cooling power B, and low cooling power C) of the compressor 12 may be set identically or set differently from each other for each starting condition.

In the freezing chamber high-temperature cooling step, the low speed (low speed A, low speed B, low speed C) of the cooling fan 22 may be set identically or set differently for each starting condition.

In the freezing chamber high-temperature cooling step, the second compressor stop temperature (temperature A, temperature B, and temperature C) may be set identically or set differently from each other for each start condition.

In the freezing chamber high-temperature cooling step, it is possible for the set times (A, B, C) to be set to be the same for each starting condition, or to be set differently from each other.

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

The freezing chamber high temperature cooling step may be completed after being carried out for a set time (A, B, C), and the reference cooling step (S1) may be performed again after the freezing chamber high temperature cooling step (S2 to S9) as described above. .

5 is a diagram illustrating the compressor control and the change in the freezer compartment load of the comparative example compared to the embodiment of the present invention, and FIG. 6 is a diagram illustrating the compressor control and the change in the freezing chamber load according to the embodiment of the present invention.

In the comparative example shown in FIG. 5, during the high-temperature cooling step of the freezer compartment as in the embodiment of the present invention, the compressor 12 is driven with the maximum cooling power (TDC, for example, 54.2W), and the cooling fan 22 is operated at high speed. It is a diagram showing the fluctuation of the load in the freezing compartment when it is rotated, and FIG. 6 is a high-temperature cooling step of the freezer compartment, the compressor 12 is driven with a set low cooling power (Tset, for example, 46.5W) lower than the maximum cooling power, and cooling A diagram illustrating a change in the load of the freezer compartment when the fan 22 is rotated at a low speed.

Referring to FIG. 5 , it can be confirmed that the freezer compartment load of the comparative example is -18°C when 4 hours have elapsed after rising to -18°C, and the freezer compartment load of the embodiment of the present invention is -18°C with reference to FIG. 6 . It can be confirmed that when 4 hours have elapsed after rising to -18.7°C.

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

As in this embodiment, when the compressor 12 is driven with 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 continuously cooling during the continuous operation time (HT).

The above description is merely illustrative of the technical spirit of the present invention, and various modifications and variations will be possible without departing from the essential characteristics of the present invention by those skilled in the art to which the present invention pertains.

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

The protection scope of the present invention should be construed by the following claims, and all technical ideas within the equivalent range should be construed 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)

cabinet in which the compressor is installed;
an evaporator connected to the compressor;
a defrost heater for defrosting the evaporator;
an evaporator temperature sensor sensing the temperature of the evaporator;
a freezing chamber formed in the cabinet, a cooling fan installed therein, and opened and closed by a freezing chamber door;
a door switch for detecting opening and closing of the freezing compartment door;
a refrigerating compartment formed in the cabinet to communicate with the freezing compartment and supplied with cold air generated by an evaporator, and in which a refrigerating compartment temperature sensor is installed; and
a controller connected to the evaporator temperature sensor, the refrigerating compartment temperature sensor, the door switch, the defrost heater and the timer, and controlling on/off control of the compressor and the cooling fan by the refrigerating compartment temperature sensor;　In a refrigerator comprising:
a) When the temperature detected by the evaporator temperature sensor after the defrost heater is turned off is above the first set temperature,
b) When the temperature sensed by the evaporator temperature sensor in the state in which the freezer door is opened is equal to or greater than the second set temperature,
c) When the door opening time measured by the timer is longer than the set time while the freezer door is open,
When at least one of a), b), and c) is satisfied, the control apparatus of the refrigerator according to claim 1 , wherein the rotation speed of the compressor and the cooling fan is controlled at a low speed operation. delete delete delete delete delete delete delete delete delete

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