KR20190107899A - Refrigerator - Google Patents

Abstract

A refrigerator of the present invention comprises: a refrigerating cycle device, which includes a compressor in which a refrigerant is circulated, a condenser, an expansion device, and an evaporator, to cool a refrigerating compartment and a freezing compartment; a door switch sensing the opening and closing of a refrigerating compartment door which opens and closes the refrigerating compartment; and a control unit variably controlling the cooling force of the compressor. Here, the control unit performs a normal operation in which the compressor is operated at a reference cooling force when the refrigerating compartment door is opened during an unused time period, and, if the refrigerating compartment door is opened during a used time period and the temperature increase rate of the refrigerating compartment exceeds a stabilizing temperature increase rate after the refrigerating compartment door is opened, a load response operation is performed. When the load response operates, if the temperature of external air exceeds a predetermined temperature and the temperature of the evaporator exceeds the maximum stabilizing temperature, a power mode is executed in which the compressor is operated at the maximum cooling force. Furthermore, if the temperature of the external air does not exceed the predetermined temperature, and the temperature of the evaporator does not exceed the maximum stabilizing temperature, a power saving mode is executed in which the compressor is operated at a power-saving cooling force that is higher than the reference cooling force but lower than the maximum cooling force.

Description

Refrigerator {Refrigerator}

The present invention relates to a refrigerator, and more particularly to a refrigerator capable of variably controlling the cooling power of the compressor.

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 main body having a storage compartment such as a freezer compartment or a refrigerating compartment in which food is stored, a door connected to the main body to open and close the storage compartment, and a cooling device that cools the storage compartment.

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

When the door is opened, outside air may flow into the storage compartment, the storage compartment may be heated up, and the load of the storage compartment may be increased.

The refrigerator can increase the cooling power of the compressor when the load increases, so that the compressor can be optimally operated. An example of such a refrigerator is disclosed in Korean Patent Laid-Open Publication No. 10-2011-0087465 A (published on August 03, 2011). The refrigerator measures the running time of the compressor by a timer, controls the on / off of the compressor according to the temperature value detected by the storage room temperature sensor, and increases the cooling power of the compressor when the load increases, thereby allowing the compressor to operate at an optimum rate. Can be driven by

On the other hand, the refrigerator can perform a load response operation according to the opening time of the door and the internal temperature, an example of such a refrigerator is disclosed in Republic of Korea Patent Publication No. 10-2014-0019594 A (published February 17, 2014) The refrigerator operates the compressor when the refrigerator door is opened for a predetermined time (for example, 1 minute) or more, and the internal temperature of the refrigerating compartment or the refrigerating compartment is higher than the set temperature for a predetermined time while the refrigerator door is not opened for a predetermined time. If it persists, the compressor can be operated and the set temperature inside the freezer or refrigerating compartment can be kept stable at all times.

Republic of Korea Patent Application Publication No. 10-2011-0087465 A (August 03, 2011 published) Republic of Korea Patent Publication No. 10-2014-0019594 A (published February 17, 2014)

The refrigerator according to the related art has a problem in that power consumption may be increased and supercooled since the compressor is driven when the refrigerator door is opened for a predetermined time or the internal temperature is maintained for a predetermined time or more for a predetermined time.

An object of the present invention is to provide a refrigerator that can reduce power consumption while minimizing a decrease in the quality of food in the refrigerator compartment by performing an optimal load response operation when the refrigerator compartment door is opened.

According to an embodiment of the present invention, a refrigerator includes: a body in which a refrigerator compartment and a freezer compartment are formed; A refrigeration cycle apparatus including a compressor, a condenser, an expansion mechanism, and an evaporator, for cooling the refrigerating compartment and the freezing compartment; A door switch for detecting opening and closing of the refrigerating chamber door for opening and closing the refrigerating compartment; And a control unit for variably controlling the cooling power of the compressor. If the time zone at the time of opening the refrigerating chamber door is an unused time zone, the control unit performs a general operation of driving the compressor at a reference cold power.

The control unit can perform the load response operation when the time zone at the time of opening the refrigerating chamber door is the use time zone, and the rate of temperature rise of the refrigerating chamber after opening the refrigerating chamber door exceeds the stabilization temperature rise ratio.

The controller may perform a power mode in which the compressor is driven at the maximum cold power when the outside temperature exceeds the set temperature and the evaporator temperature exceeds the stabilized maximum temperature during the load response operation.

The controller may perform a power saving mode in which the compressor is driven at a power saving cold power higher than the reference cold power and lower than the maximum cold power when the outside temperature is lower than the set temperature or the evaporator temperature is lower than the stabilization maximum temperature.

The controller may predict the use or nonuse of the refrigerator compartment door according to the opening and closing of the refrigerating chamber door and store the same in the storage unit. In this case, if the unit time zone at the time of opening the refrigerating chamber door is use, and the next unit time zone is the use, the time zone at the time of opening the refrigerating chamber door may be the use time zone. If the time zone when the refrigerator door is opened is used and the next time zone is unused, the time zone when the refrigerator door is opened may be an unused time zone.

The controller may store the highest temperature of the detected evaporator during the stabilization period during which the opening of the refrigerating chamber door is not sensed as the stabilization maximum temperature in the storage unit.

The controller may store the temperature change rate of the refrigerating compartment detected during the stabilization period in which the opening of the refrigerating chamber door is not sensed as the stabilization temperature rise rate in the storage unit.

According to an embodiment of the present invention, the normal operation time and the load response operation can be selected by considering the usage time period in which the user's usage pattern is reflected and the temperature rise rate of the refrigerating chamber, so that the reliability of the load response operation is high, and at the time of the load response operation. When the load fluctuation is large according to the outside temperature and the temperature of the evaporator, the power mode is executed to quickly solve the load in the storage compartment, and when the load fluctuation is small, the power saving mode is performed to minimize the power consumption.

1 is a view showing a refrigerator according to an embodiment of the present invention;
2 is a control block diagram of a refrigerator according to an embodiment of the present invention;
3 is a view showing a change in cold power when the refrigerator is operated in a normal operation and load response operation according to an embodiment of the present invention,
4 is a diagram illustrating an example of predicting a use time zone and an unuse time zone of a refrigerator according to an embodiment of the present disclosure;
5 is a view showing a refrigerator compartment temperature change when the refrigerator compartment door of the refrigerator according to an embodiment of the present invention is closed;
6 is a flowchart illustrating a method of operating a refrigerator 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 refrigerator according to an embodiment of the present invention, Figure 2 is a control block diagram of a refrigerator according to an embodiment of the present invention, Figure 3 is a refrigerator according to an embodiment of the present invention the general operation and load It is a figure which shows the change of cold power at the time of operation | movement by corresponding operation.

The refrigerator includes a main body 1 in which a refrigerator compartment R and a freezer compartment F are formed. The refrigerator includes a refrigerator compartment door 2 that opens and closes the refrigerator compartment R, and a freezer compartment door 3 which opens and closes the freezer compartment F. As shown in FIG.

The main body 1 may include a barrier 10 partitioning the refrigerating chamber R and the freezing chamber F. The cabinet 1 may include an outer case 11 forming an exterior, a refrigerating compartment inner case 12 having a refrigerating compartment R, and a freezing compartment inner case 13 having a freezing compartment F formed therein.

The refrigerating compartment door 2 and the freezing compartment door 3 may be rotatably connected to the cabinet 1 by a hinge, and each of them may be provided in singular or plural.

The refrigerator may include a refrigerating compartment temperature sensor 5 detecting a temperature of the refrigerating compartment R and a freezing compartment temperature sensor 6 detecting a temperature of the freezing compartment F.

The refrigerator compartment temperature sensor 5 may detect the temperature of the refrigerator compartment R and transmit the detected temperature to the controller 50.

The freezer compartment temperature sensor 6 may detect the temperature of the freezer compartment F and transmit it to the controller 50.

The refrigerator may include a refrigeration cycle apparatus, which includes a compressor 22 through which the refrigerant is circulated, a condenser 23, an expansion mechanism (not shown), and an evaporator 21, and includes a refrigerating chamber R and The freezer compartment F can be cooled.

The compressor 22 and the condenser 23 may be disposed in the machine room M formed to be partitioned from the freezing chamber F and the refrigerating chamber R in the main body 1.

The refrigerator may cool the refrigerating compartment R and the freezing compartment F together with one evaporator 21, and in this case, the evaporator 21 is disposed inside any one of the freezer compartment inner case 13 and the main body. (1) has a cold air supply passage 14 for guiding the cold air cooled by the evaporator 21 to the refrigerating chamber inner case 12, and a cold air return for guiding the cold air of the refrigerating chamber R to the evaporator 21 ( Not shown) may be formed. The refrigerator may further include a refrigerating chamber duct 30 capable of supplying cold air cooled by the evaporator 21 into the refrigerating chamber inner case 12 in the freezer compartment inner case 13. The refrigerator compartment damper 30 may be disposed in the cold air supply passage 14 or the refrigerator compartment inner case 12. The refrigerating chamber damper 30 may include a damper case having a passage through which cold air passes, a damper body disposed to rotate or move in the damper case to open and close the passage, and a driving source such as a motor to rotate or move the damper body. Can be.

The refrigerator may further include a freezing compartment fan 34 which circulates cold air in the freezing compartment F to the evaporator 21 and the freezing compartment F. The freezer compartment 34 may be disposed in the freezer compartment inner case 13.

The refrigerator may further include a refrigerating chamber fan 36 for flowing the cold air cooled in the evaporator 21 to the refrigerating chamber R. The refrigerator compartment fan 36 may be disposed in the refrigerator compartment inner case 12.

On the other hand, the refrigerator may be provided with a plurality of evaporator 21 in the main body 1, in this case, the evaporator 21 is a freezer compartment evaporator disposed inside the freezer compartment inner case 13, the refrigerator compartment inner case 12 It is possible to include a refrigerating chamber evaporator which is arranged inside. When the refrigerator includes both a freezer compartment evaporator and a refrigerator compartment evaporator as described above, the refrigeration cycle apparatus may further include a switching valve (not shown) for selectively supplying refrigerant to the freezer compartment evaporator and the refrigerator compartment evaporator. The refrigerant may be guided to the refrigerator compartment evaporator during the refrigerating compartment operation to cool the refrigerator compartment, and the refrigerant may be guided to the freezer compartment evaporator during the freezer compartment operation to cool the freezer compartment.

The refrigerator may further include a door switch 40 that detects opening and closing of the refrigerating compartment door 2 that opens and closes the refrigerating compartment R. The refrigerator may further include an outside temperature sensor 42 that detects outside temperature. The refrigerator may further include an evaporator temperature sensor 44 that detects a temperature of the evaporator 21.

The refrigerator may further include a controller 50 that controls the compressor 22.

The refrigerator may further include an input unit 60 through which a user may input a freezer target temperature or a freezer target temperature. The refrigerator may further include a timer 70 capable of counting time. The refrigerator may further include a storage unit 80 such as a memory in which various data such as a temperature value and a time may be stored.

When the refrigerator includes one evaporator 21 and the refrigerator compartment damper 30, the controller 50 may turn on or off the compressor 22 according to the temperature of the freezer compartment F. The controller 50 may open and close the refrigerator compartment damper 30 according to the temperature of the refrigerator compartment R.

The controller 50 turns on the compressor 22 when the temperature of the freezer compartment F detected by the freezer compartment temperature sensor 6 rises to an upper limit temperature of the freezer compartment target temperature (for example, the freezer compartment target temperature + 1 ° C). If the temperature of the freezer compartment F sensed by the freezer compartment temperature sensor 6 drops to a lower limit temperature of the freezer compartment target temperature (eg, the freezer compartment target temperature-1 ° C), the compressor 22 can be turned off. .

The control unit 50 determines that the temperature TR of the refrigerating chamber R detected by the refrigerating compartment temperature sensor 5 is the upper limit temperature of the refrigerating chamber target temperature (for example, 3 ° C) (for example, the refrigerating chamber target temperature + 1 ° C). When it rises to, the refrigerator compartment damper 30 can be opened, and the temperature TR of the refrigerator compartment R detected by the refrigerator compartment temperature sensor 5 is the lower limit temperature of the refrigerator compartment target temperature (for example, the freezer target temperature-1). When lowering to (° C), the refrigerating chamber damper 30 can be closed.

When the refrigerator includes a refrigerator compartment evaporator, a freezer compartment evaporator, and a switching valve, the controller 50 may selectively perform a freezer compartment operation and a refrigerator compartment operation. The controller 50 may turn the compressor 22 on and off according to the temperature of the freezer compartment F during the freezer compartment operation, and control the switching valve to the freezer compartment supply mode. The controller 50 turns on the compressor 22 when the temperature of the freezer compartment F detected by the freezer compartment temperature sensor 6 rises to an upper limit temperature of the freezer compartment target temperature (for example, the freezer compartment target temperature + 1 ° C). Can be controlled in the freezer supply mode. When the temperature of the freezer compartment F detected by the freezer compartment temperature sensor 6 drops to a lower limit temperature of the freezer compartment target temperature (for example, the freezer compartment target temperature-1 ° C), the control unit 50 turns off the compressor 22. Can be turned off.

Meanwhile, the controller 50 may turn the compressor 22 on and off according to the temperature of the refrigerating chamber R during the refrigerating chamber operation, and control the switching valve to the refrigerating chamber supply mode. The control unit 50 determines that the temperature TR of the refrigerating chamber R detected by the refrigerating compartment temperature sensor 5 is the upper limit temperature of the refrigerating chamber target temperature (for example, 3 ° C) (for example, the refrigerating chamber target temperature + 1 ° C). When it is raised to, the compressor 22 can be turned on, and the selector valve can be controlled in the refrigerating chamber supply mode. When the temperature TR of the refrigerating chamber R sensed by the refrigerating compartment temperature sensor 5 is lowered to a lower limit temperature of the refrigerating compartment target temperature (for example, the freezer target temperature-1 ° C), the compressor ( 22) can be turned off.

The controller 50 may variably control the cooling power of the compressor 22 according to the operation of the refrigerator (general operation and load response operation) during the control of the compressor 22. The controller 50 may control the compressor 22 to a cooling force such as a reference cooling force P1, a power saving cooling force P2, and a maximum cooling force P3.

The reference cold force P1 may be a cold force lower than the maximum cold force P3, and the power saving cold force P2 may be a cold force between the reference cold force P1 and the maximum cold force P3. The power saving cold force P2 may be a cold force close to the maximum cold force P3, and may be a relatively high cold force lower than the maximum cold force P3.

Each of the reference cold power P1, the power saving cold power P2, and the maximum cold power P3 may be in the cold power range.

The reference cold power P1 may range from approximately 50W to 70W, the power saving cold power P2 may range from 70W to 90W, approximately 85W, and the maximum cold power P3 may range from 90W to 150W. The power saving cold power P2 may be about 1.4 times the cold power of the reference cold power P1, and the maximum cold power P3 may be the cold power that is about 1.7 times the reference cold power P3.

The controller 50 may drive the compressor 22 to the reference cooling force P1 during the normal operation N, not the load response operation L. FIG.

Here, the load response operation (L) is an operation day in which the refrigerating chamber (R) is cooled at a high speed so as to correspond to the load of the refrigerating chamber (R) if the load of the refrigerating chamber (R) is greater than or equal to the reference load after the refrigerating chamber door (2) is opened. According to the speed of cooling the refrigerating chamber (R) may be divided into the power saving mode (LS) and the power mode (LP).

The control unit 50 may drive the compressor 22 at a power saving cold power P2 or a maximum cold power P3 during the load response operation L. FIG.

The refrigerator may be operated in the load correspondence operation L which is the power mode LP when the load of the compressor 22 is large, and the load correspondence operation which is the power saving mode LS when the load of the compressor 22 is small. L) can be operated.

The load response operation L may be a power saving mode LS in which the compressor 22 is driven at a power saving cold power P2 or a power mode LP in which the compressor 22 is driven at a maximum cooling power P3.

The controller 50 may control the freezer compartment 34 and the refrigerating compartment fan 36. The controller 50 may drive the freezer compartment 34 when the freezer compartment F is cooled. In addition, when the refrigerator includes a switching valve, the switching valve may be controlled in a freezer compartment supply mode.

The controller 50 may drive the refrigerating compartment fan 36 when the refrigerating compartment R is cooled. The controller 50 may control the refrigerating chamber damper 30. When the refrigerator compartment R of the controller 50 is cooled, the refrigerator compartment damper 30 may be closed or the switching valve may be controlled in the refrigerator compartment supply mode.

4 is a diagram illustrating an example of predicting a use time and an unuse time of the refrigerator according to an embodiment of the present invention.

The controller 50 predicts that the user opens or closes the door (use) or does not open or close the refrigerator door 2 according to the unit time according to the opening / closing of the refrigerating chamber door 2 (not used). 50) can be stored.

Figure 4 (a) is an example of the past use schedule for storing the time the refrigerator door is opened by day and time zone, Figure 4 (b) after analyzing the table shown in Figure 4 (a), Afterwards, the user predicts a schedule of opening and closing the refrigerating compartment door 2 and a schedule of not using the refrigerating compartment door 2 (not used).

The controller 50 analyzes the usage pattern UP in which the user has opened and closed the refrigerating chamber door 2, and then predicts a time period during which the user opens and closes the refrigerating chamber door 2 as shown in FIG. 4B. As a result of this analysis, the schedule data D may be generated on a daily basis (i.e., 24 hours) and for each time zone, to predict future use and non-use, and the generated schedule data D may be stored in the storage unit ( 80).

If the unit time zone at the time of opening the refrigerator door 2 is use, and the next unit time zone is use, the time zone at the time of opening the refrigerator door may be a use time zone. If the time zone at the time of opening the refrigerating door 2 is used, and the next time zone is unused, the time zone at the time of opening the refrigerator door may be an unused time zone.

For example, referring to May 14 shown in FIG. 4B, since 0 to 4 and 8 to 16 o'clock are each unused, it may be an unused time zone NU. Then, each of the 4 to 6 o'clock and the 17 to 20 o'clock, respectively, the next time zone is the use time zone (U), and each of the 7 and 21 o'clock may be an unused time zone (NU) because the next time zone is unused. .

On the other hand, when the refrigerating chamber door 2 is opened, the control unit 50 performs the load response operation (L) even when the refrigerating chamber door 2 is open, when the refrigerating chamber door 2 is unused as shown in FIG. 4. The general operation N for driving the compressor 22 at the reference cooling power P1 can be performed without performing it.

The storage unit 80 stores schedule data D for a used time zone and an unused time zone for each day, and the control unit 50 opens the refrigerating chamber door 2 from the schedule data D stored in the storage unit 80. Time points can be checked using time zones (U) and unused time zones (NU).

On the other hand, the control unit 50 is the time zone when the refrigerating chamber door is open, as shown in Figure 4 (b), the use time period (U), the temperature rise rate of the refrigerating chamber (R) after the opening of the refrigerating chamber door 2 is stabilized. If the temperature rise rate is exceeded, load response operation can be performed.

The temperature increase rate of the refrigerating compartment is a rate at which the temperature of the refrigerating compartment R is increased after the refrigerating compartment door 2 is opened, and is a value obtained by dividing the temperature change of the refrigerating compartment R detected by the refrigerating compartment temperature sensor 5 by the temperature change time. Can be.

The stabilization temperature increase rate may be data stored in the storage unit 80, and the stabilization temperature rise rate may be defined as a rate of increase of the temperature of the refrigerating chamber R detected during the stabilization period in which the opening of the refrigerating chamber door 2 is not detected.

When the refrigerator compartment door 2 is opened, the controller 50 may determine whether the load response operation is performed by comparing the detected temperature rise rate of the refrigerator compartment with the stabilization temperature rise rate, and the refrigerator compartment detected after opening the refrigerator compartment door 2. If the temperature rise rate is higher than the stabilized temperature rise rate, the load response operation may be performed, otherwise, the normal operation may be performed.

5 is a view showing a change in the refrigerator compartment temperature when the refrigerator compartment door of the refrigerator according to the embodiment of the present invention is closed.

The controller 50 may store the temperature change rate of the refrigerating chamber R, which is detected during the stabilization period during which the opening of the refrigerating chamber door 2 is not detected, as the stabilization temperature increase rate in the storage unit 80. The controller 50 may calculate the rate of increase of the refrigerating chamber temperature while the refrigerating chamber door 2 is not opened and the temperature of the refrigerating chamber R is increased.

The controller 50 controls the temperature T1-T2 by subtracting the lower limit temperature T2 of the refrigerating chamber target temperature from the upper limit temperature T1 of the refrigerating chamber target temperature from the lower limit temperature of the refrigerating chamber target temperature to the upper limit temperature of the refrigerating chamber target temperature. The rising time t may be divided, and the calculated value may be stored in the storage unit 50 at a stabilization temperature rise rate.

Then, the controller 50 calculates the stabilization maximum temperature by the temperature of the evaporator 21 sensed by the evaporator temperature sensor 44 during the stabilization period in which the opening of the refrigerating chamber door 2 is not detected, and then the storage unit 80. ) Can be stored.

The stabilization maximum temperature may be defined as the highest temperature among the temperatures of the evaporator 21 detected by the evaporator temperature sensor 44 during the stabilization period in which the opening of the refrigerating chamber door 2 is not detected.

That is, the controller 50 may store the highest temperature among the detected temperatures of the evaporator 21 during the stabilization period in which the opening of the refrigerating chamber door is not detected in the storage 80 as the stabilization maximum temperature.

On the other hand, the control unit 50, in the load response operation, if the outside temperature is higher than the set temperature (for example, 34 ℃), and the evaporator temperature is higher than the stabilization maximum temperature, and the power mode for driving the compressor 22 at the maximum cold power It can be carried out.  

When the outside temperature is above the set temperature (eg, 34 ° C.) and the evaporator temperature is above the stabilization maximum temperature, the external load and the temperature rise inside the refrigerating chamber 2 according to the outside air are respectively large, and the controller 50 In order to eliminate the sudden load rise in the refrigerating chamber 2, it is preferable to implement a power mode for driving the compressor 22 at the maximum cold power.

In addition, when the outside temperature Tout is lower than the set temperature or the evaporator temperature is lower than or equal to the stabilization maximum temperature, the controller 50 sets the compressor 22 to be higher than the reference cold power P1 and lower than the maximum cold power P3. A power saving mode driven at P2 can be implemented.

When the outside temperature Tout is below the set temperature or the evaporator temperature is below the stabilization maximum temperature, the increase in the refrigerating compartment temperature at the time of opening the refrigerating compartment door 2 is lower than when the power mode should be performed, in which case the control unit 50 In order to minimize the power consumption, it is preferable to drive the compressor 22 with the power saving cooling power P2 lower than the maximum cooling power P3.

6 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, when the refrigerating chamber door 2 is open and unused, the general operation of driving the compressor at the reference cooling force P1 may be performed. (S1) (S2) (S3)

When the refrigerator compartment door 2 is opened, the control unit 50 can check the use time U or the unuse time NU by the schedule data D stored in the storage 80 (see FIG. 4), and the refrigerating door ( If the time of opening (NU) is not used at the time of opening 2), normal operation can be performed.

The controller 50 may turn the compressor 22 on and off according to the temperature sensed in the freezer compartment F during normal operation, and the refrigerating compartment R may be the upper limit temperature of the target temperature of the refrigerating compartment as shown in FIG. 5. The temperature rise and fall to the target temperature and the lower limit temperature can be repeated.

 On the other hand, the control unit 50 can perform the load response operation when the time zone at the time of opening the refrigerating chamber door 2 is the use time zone U, and the rate of temperature rise of the refrigerating chamber after opening the refrigerating chamber door 2 exceeds the stabilization temperature rise rate. (S4 ~ S8)

The controller 50 may perform a power mode in which the compressor is driven at the maximum cold power when the outside air temperature exceeds the set temperature and the evaporator temperature exceeds the stabilized maximum temperature during the load response operation. (S4) (S5) (S6) (S7)

On the other hand, if the outside temperature is below the set temperature or the evaporator temperature is below the stabilization maximum temperature, the controller 50 may perform a power saving mode for driving the compressor to a power saving cold power higher than the reference cold power and lower than the maximum cold power. (S4) (S5) (S7)

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: body 22: compressor
40: door switch 50: control unit

Claims (4)

A main body having a refrigerator compartment and a freezer compartment formed therein;
A refrigeration cycle apparatus for cooling the refrigerating compartment and the freezing compartment, comprising a compressor through which a refrigerant is circulated, a condenser, an expansion mechanism, and an evaporator;
A door switch for detecting opening and closing of the refrigerating chamber door for opening and closing the refrigerating compartment;
A control unit for variably controlling the cooling power of the compressor,
The control unit
If the time zone at the time of opening the refrigerating chamber door is unused time zone, the general operation of driving the compressor at a reference cold power is performed.
If the time zone at the time of opening the refrigerating chamber door is the use time zone, and the temperature rise rate of the refrigerating compartment after opening the refrigerating compartment door is more than the stabilization temperature rise rate, load response operation is performed.
At the load response operation,
If the outside temperature is above the set temperature and the evaporator temperature is above the stabilization maximum temperature, the power mode for driving the compressor at the maximum cold power is carried out.
And a power saving mode for driving the compressor to a power saving cold power higher than the reference cold power and lower than the maximum cold power when the outside temperature is below the set temperature or the evaporator temperature is below the stabilization maximum temperature. The method of claim 1,
The control unit predicts the use or non-use for each time zone according to the opening and closing of the refrigerating chamber door, and stores it in the storage unit.
If the unit time zone when the refrigerator door is opened is used, and the next unit time zone is used, the time zone when the refrigerator door is opened is a use time zone,
And a time zone at the time of opening the refrigerator door is unused, and a time zone at the time of opening the refrigerator compartment door is an unused time zone. The method of claim 1,
The control unit is a refrigerator for storing the highest temperature of the detected evaporator during the stabilization period in which the opening of the refrigerating chamber door is stored in the storage unit as the stabilization maximum temperature. The method of claim 1,
The control unit is a refrigerator for storing the temperature change rate of the refrigerating compartment detected during the stabilization period in which the opening of the refrigerating chamber door is detected as the stabilization temperature rise rate in the storage unit.

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