KR20200082221A - Refrigerator and method for controlling the same - Google Patents

Abstract

A control method of a refrigerator according to the present invention comprises the steps of: driving a first cooling cycle for a first storage chamber to drive a compressor, and driving a first cooling fan for the first storage chamber; if a condition for stopping the first cooling cycle is satisfied, switching to a second cooling cycle for cooling a second storage chamber to drive the compressor, and driving a second cooling fan for cooling the second storage chamber; if a condition for stopping the second cooling cycle is satisfied, switching to a third cooling cycle for cooling the first storage chamber to drive the compressor, and driving the first cooling fan; and if a condition for stopping the third cooling cycle is satisfied, performing a pump-down operation. The present invention, when switching from the first cooling cycle to the second cooling cycle, continues to drive the first cooling fan and, controls the first cooling fan to reduce an output during driving of the second cooling cycle based on changes of one or more between the temperature of the first storage chamber and the temperature of a first evaporator for supplying cool air to the first storage chamber. The present invention can save power consumption.

Description

Refrigerator and its control method{Refrigerator and method for controlling the same}

The present specification relates to a refrigerator and a control method thereof.

Refrigerators are household appliances that can store objects such as food at low temperatures in a storage room provided in a cabinet. Since the storage chamber is surrounded by an insulating wall, the storage chamber interior may be maintained at a temperature lower than the external temperature.

The storage compartment may be divided into a refrigerating compartment or a freezing compartment according to the temperature band of the storage compartment.

In recent years, refrigerators have been developed in which evaporators are installed in a freezer and a refrigerator. In such a refrigerator, a refrigerant flows to one evaporator of each of the evaporators of the cold room and the refrigeration chamber, and then the refrigerant flows to another evaporator.

A refrigerator and a control method thereof are disclosed in Korean Patent Publication No. 10-2018-0065192, which is a prior document.

In the case of the control method of the refrigerator of the prior art, the refrigeration cycle that satisfies the starting condition of the refrigeration cycle is started while the refrigeration cycle is operating. During the operation of the refrigeration cycle, the freezer fan is running, and the freezer fan operates without stopping even after the refrigeration cycle has started.

In this way, when the freezer fan is operated after the freezing cycle is stopped, the refrigerant of the evaporator for the freezer can be recovered by a compressor, and air is cooled by the latent heat of evaporation of the evaporator for the freezer so that the freezer cooling can be maintained for a certain time.

In the case of the prior literature, the freezer fan operates while maintaining the previous output, that is, the output in the freezing cycle, until the freezer fan stop condition is satisfied.

By the way, the temperature of the evaporator for the freezer increases during the operation of the freezer fan, and the difference in temperature between the freezer compartment and the evaporator for the freezer decreases, resulting in lower heat exchange efficiency, but the output of the freezer fan remains the same. There is a disadvantage that unnecessary power consumption is caused by operation.

The present embodiment provides a refrigerator and a control method thereof, in which power consumption can be reduced by reducing the output step by step while the first cooling fan operating in the first cooling cycle stops and stops after the first cooling cycle is stopped. do.

In addition, the present embodiment provides a refrigerator in which power consumption is reduced and a control method thereof by adjusting the output of the first cooling fan in a third cooling cycle starting after the second cooling cycle is stopped.

A control method of a refrigerator according to an aspect includes: a first cooling cycle for a first storage compartment is operated, the compressor is operated, and the first cooling fan for the first storage compartment is operated; When the stop condition of the first cooling cycle is satisfied, switching to a second cooling cycle for cooling of the second storage chamber to operate the compressor and operating a second cooling fan for cooling of the second storage chamber; When the stop condition of the second cooling cycle is satisfied, switching to a third cooling cycle for cooling of the first storage compartment to operate the compressor, and operating the first cooling fan; And when the stop condition of the third cooling cycle is satisfied, a pump down operation may be performed.

In this embodiment, when switching from the first cooling cycle to the second cooling cycle, the first cooling fan continues to operate, the temperature for the first storage chamber and the first for supplying cold air to the first storage chamber Based on a change in temperature of one or more of the temperatures of the evaporator, the output of the first cooling fan may be controlled to decrease during the second cooling cycle operation.

During the operation of the second cooling cycle, the output of the first cooling fan may be gradually reduced.

The first cooling fan operates as a first initial output when the second cooling cycle is operated, and when the temperature of the first evaporator is higher than a first reference temperature value, the first cooling fan is lower than the first initial output. 1 Can operate with reduced output.

In the process of the first cooling fan operating at the first reduction output, if the temperature of the first evaporator is higher than the second reference temperature value greater than the first reference temperature value, the first cooling fan reduces the first reduction It can operate with a second reduced output lower than the output.

When the temperature of the first evaporator is higher than the third reference temperature value greater than the second reference temperature value in the process of the first cooling fan operating at the second reduction output, the first cooling fan is stopped or the second After operation with a third reduction output that is lower than the two reduction outputs, it may be stopped when a set time has elapsed, or the third reduction output may continuously operate until a stop condition of the second cooling cycle is satisfied.

During the pump down operation, the first cooling fan operates with a second initial output, and the output of the first cooling fan can be reduced one or more times until it is stopped.

If the temperature of the first evaporator is higher than the fourth reference temperature value while the first cooling fan is operating with the second initial output, the first cooling fan operates with a fourth reduced output lower than the second initial output. can do.

In the process of the first cooling fan operating at the fourth reduction output, if the temperature of the first evaporator is higher than the fifth reference temperature value greater than the fourth reference temperature value, the first cooling fan reduces the fourth reduction It can operate with a fifth reduction output lower than the output.

When the temperature of the first evaporator is higher than the sixth reference temperature value greater than the fifth reference temperature value in the process of the first cooling fan operating at the fifth reduction output, the first cooling fan is stopped or the first It can be stopped when the set time elapses after operation with the 6th reduction output lower than 5 reduction output.

The third reference temperature value may be the same as or greater than the fourth reference temperature value. Alternatively, the fourth reference temperature value may be greater than the first reference temperature value.

The difference between the first reference temperature value and the second reference temperature value may be the same as or greater than the difference between the second reference temperature value and the third reference temperature value.

The first cooling fan operates at a first initial output when the second cooling cycle is operated, and in the process of the first cooling fan operating at the first initial output, the temperature of the first evaporator and the first storage chamber When the temperature difference value is smaller than the first reference difference value, the first cooling fan may operate as a first reduction output lower than the first initial output.

In the process of the first cooling fan operating at the first reduction output, if the difference between the temperature of the first evaporator and the temperature of the first storage chamber is less than a second reference difference value, the first cooling fan is the It can operate with a second reduction output lower than the first reduction output. The second reference difference value is smaller than the first reference difference value.

In the process of the first cooling fan operating at the second reduction output, if the difference between the temperature of the first evaporator and the temperature of the first storage chamber is less than a third reference difference value, the first cooling fan is stopped Alternatively, it may be stopped when a set time elapses after operation with a third reduction output lower than the second reduction output. The third reference difference value is smaller than the second reference difference value.

If the difference between the temperature of the first evaporator and the temperature of the first storage chamber is less than a fourth reference difference value while the first cooling fan is operating at the second initial output, the first cooling fan is the first cooling fan. It can operate with 4th reduction output lower than 2 initial output.

If the difference between the temperature of the first evaporator and the temperature of the first storage chamber is smaller than the fifth reference difference value smaller than the fourth reference difference value in the process of the first cooling fan operating at the fourth reduction output , The first cooling fan may operate with a fifth reduction output lower than the fourth reduction output.

In the process of the first cooling fan operating at the fifth reduction output, if the difference value between the temperature of the first evaporator and the temperature of the first storage chamber is smaller than the sixth reference difference value smaller than the fifth reference difference value , The first cooling fan may be stopped or stopped when a set time elapses after operation with a sixth reduction output lower than the fifth reduction output.

The first reference difference value may be greater than the fourth reference difference value. Alternatively, at least one of the first reference difference value to the second reference difference value may be the same as at least one of the fourth reference difference value to the sixth reference difference value.

The difference value between the first reference difference value and the second reference difference value may be the same as or greater than the difference value between the second reference difference value and the third reference difference value.

The first cooling fan operates as a first initial output when the second cooling cycle is operated, and when the temperature of the first storage chamber is lower than a first set value, the first cooling fan is lower than the first initial output. 1 Can operate with reduced output.

In the process of the first cooling fan operating as the first reduction output, if the temperature of the first storage chamber is lower than the second set value, the first cooling fan is set to a second reduction output lower than the first reduction output. Can work The second set value is smaller than the first set value.

In the process of the first cooling fan operating as the second reduction output, if the temperature of the first storage chamber is lower than the third set value, the first cooling fan is stopped, or the third lower than the second reduction output After operation with reduced output, it may stop when the set time has elapsed. The third set value is smaller than the second set value.

During the pump down operation, if the temperature of the first storage chamber is lower than the fourth set value while the first cooling fan is operating with the second initial output, the first cooling fan is lower than the second initial output. 4 Can operate with reduced output.

In the process of the first cooling fan operating as the fourth reduction output, if the temperature of the first storage chamber is lower than the fifth setting value smaller than the fourth setting value, the first cooling fan outputs the fourth reduction output. It can operate with a lower fifth reduction output.

In the process of the first cooling fan operating at the fifth reduction output, if the temperature of the first storage room is lower than the sixth setting value smaller than the fifth setting value, the first cooling fan is stopped or the first It can be stopped when the set time elapses after operation with the 6th reduction output lower than 5 reduction output.

The difference value between the first set value and the second set value may be the same as or greater than the difference value between the second set value and the third set value.

The average output of the first cooling fan after the start of the pump down operation may be greater than the average output of the first cooling fan in the second cooling cycle. In addition, the operating time of the first cooling fan after the start of the pump down operation may be greater than the operating time of the first cooling fan in the second cooling cycle.

When the operation time of the first cooling fan reaches a time limit while the first cooling fan is operating with the first initial output, the first reduction output, or the second reduction output, the first cooling fan may be turned off. .

In the first cooling cycle, the first cooling fan operates as a first reference output, and the first initial output may be the same as or smaller than the first reference output.

In the third cooling cycle, the first cooling fan operates as a second reference output, and the second reference output may be kept constant or reduced one or more times during the operation of the third cooling cycle.

When the third cooling cycle is operated, the first cooling fan operates with the second reference output, and when the temperature of the first refrigerating chamber becomes lower than or equal to a reduction reference value, the first cooling fan is reduced than the second reference output. Can act as output.

Alternatively, when the third cooling cycle is operated, when the temperature of the first storage chamber is higher than the set temperature of the first storage chamber, the first cooling fan may operate as the second reference output. In addition, when the temperature of the first storage chamber is lower than the set temperature of the first storage chamber, the first cooling fan may operate as a third reference output smaller than the second reference output.

Alternatively, when the third cooling cycle is operated, when the temperature of the first storage chamber is higher than the first reduction reference value, the first cooling fan may operate as a second reference output. In addition, when the temperature of the first storage chamber is higher than the second reduction reference value, the first cooling fan may operate as a third reference output lower than the second reference output. In addition, when the temperature of the first storage room is lower than the second reduction reference value, the first cooling fan may operate as a fourth reference output lower than the third reference output.

The first reduction reference value is greater than a set temperature of the first storage room, and the second reduction reference value is less than a set temperature of the first storage room.

A control method of a refrigerator according to another aspect includes: a first cooling cycle for a first storage compartment is operated, the compressor is operated, and the first cooling fan for the first storage compartment is operated; When the stop condition of the first cooling cycle is satisfied, switching to a second cooling cycle for cooling of the second storage chamber to operate the compressor and operating a second cooling fan for cooling of the second storage chamber; When the stop condition of the second cooling cycle is satisfied, a pump down operation is performed; And after the pump down operation, the first cooling cycle is operated again.

When switching from the first cooling cycle to the second cooling cycle, the first cooling fan continuously operates, and one of the temperature of the first storage chamber and the temperature of the first evaporator for supplying cold air to the first storage chamber Based on the above temperature change, the output of the first cooling fan may be controlled during the second cooling cycle operation.

A refrigerator according to another aspect includes a compressor for compressing a refrigerant; A first evaporator receiving coolant from the compressor and generating cold air for cooling the first storage compartment; A first cooling fan for supplying cold air to the first storage chamber; A second evaporator receiving refrigerant from the compressor and generating cold air for a second storage compartment; A second cooling fan for supplying cold air to the second storage chamber; A valve selectively opening one of a first refrigerant passage connecting a refrigerant to flow between the compressor and the first evaporator and a second refrigerant passage connecting a refrigerant to flow between the compressor and the second evaporator; And it may include a control unit for controlling the first cooling fan, the second cooling fan and the valve.

The controller operates the compressor and the first cooling fan for cooling of the first storage compartment, and when the cooling of the first storage compartment is completed, for cooling of the second storage compartment, the compressor and the agent 2 The cooling fan can be operated.

Then, the control unit operates the first cooling fan in a cooling process of the second storage chamber, and changes in one or more temperatures of the temperature of the first storage chamber and the temperature of the first evaporator to supply cold air to the first storage chamber Based on the, it is possible to control the output of the first cooling fan to be reduced.

According to the proposed embodiment, after the first cooling cycle for cooling of the first storage chamber is stopped, the first cooling fan for the first storage chamber is operated while the output is gradually reduced, so that the power consumption can be reduced. have.

In addition, in this embodiment, power consumption can be reduced by adjusting the output of the first cooling fan in a third cooling cycle that starts after the second cooling cycle is stopped.

In addition, even after the completion of the pump down operation, the first cooling fan is operated, but as the output of the first cooling fan is gradually reduced, it is possible to minimize the increase in power consumption while preventing the temperature in the first storage compartment from rising. have.

1 is a view schematically showing the configuration of a refrigerator according to an embodiment of the present invention.
Figure 2 is a block diagram of a refrigerator according to an embodiment of the present invention.
3 is a flowchart schematically illustrating a control method of a refrigerator according to an embodiment of the present invention.
4 is a view showing a change in the temperature of the refrigerator compartment and the output of the refrigerator fan during the operation of the cooling cycle.
5 is a view showing the temperature change of the evaporator for the refrigerating compartment during the cooling cycle operation.

Hereinafter, some embodiments of the present invention will be described in detail through exemplary drawings. It should be noted that in adding reference numerals to the components of each drawing, the same components have the same reference numerals as possible even though they are displayed on different drawings. In addition, in describing embodiments of the present invention, when it is determined that detailed descriptions of related well-known configurations or functions interfere with understanding the embodiments of the present invention, detailed descriptions thereof will be omitted.

In addition, in describing the components of the embodiments of the present invention, terms such as first, second, A, B, (a), (b), and the like can be used. These terms are only for distinguishing the component from other components, and the nature, order, or order of the component is not limited by the term. When a component is described as being "connected", "coupled" or "connected" to another component, the component may be directly connected to or connected to the other component, but another component between each component It should be understood that may be "connected", "coupled" or "connected".

1 is a view schematically showing a configuration of a refrigerator according to an embodiment of the present invention, and FIG. 2 is a block diagram of a refrigerator according to an embodiment of the present invention.

1 and 2, the refrigerator 1 according to an embodiment of the present invention is coupled to the cabinet 10 in which the freezer 111 and the refrigerating compartment 112 are formed, and the cabinet 10. It may include a door (not shown) for opening and closing the freezer compartment 111 and the refrigerator compartment 112, respectively.

The freezer compartment 111 and the refrigerating compartment 112 may be partitioned in the left-right direction or up-down direction within the cabinet 10 by the partition wall 113.

The refrigerator 1 may be referred to as a compressor 21, a condenser 22, an expansion member 23, and a freezer evaporator 24 for cooling the freezer 111 (or "second evaporator") ) And a refrigerating chamber evaporator 25 for cooling the refrigerating chamber 112 (or may be referred to as a “first evaporator”).

The refrigerator 1 may include a switching valve 26 for allowing the refrigerant passing through the expansion member 23 to flow to one of the evaporator 24 for the freezer compartment and the evaporator 25 for the refrigerator compartment.

In the present invention, a state in which the switching valve 26 is operated so that the refrigerant flows to the evaporator 25 for the refrigerating chamber may be referred to as a first state of the switching valve 26. In addition, the state in which the switching valve 26 is operated so that the refrigerant flows to the evaporator 24 for the freezer can be referred to as a first state of the switching valve 26. The switching valve 26 may be, for example, a three-way valve.

The switching valve 26 is provided between a first refrigerant passage connecting the refrigerant to flow between the compressor 21 and the evaporator 25 for the refrigerator compartment, and between the compressor 21 and the evaporator 24 for the freezer compartment. Any one of the second refrigerant passages connecting the refrigerant to flow therebetween may be selectively opened. Cooling of the refrigerating chamber 112 and cooling of the freezing chamber 111 may be alternately performed by the switching valve 26.

The refrigerator 1 includes a freezer fan 28 for blowing air to the evaporator 24 for the freezer (which may be referred to as a "second cooling fan"), and a second motor for rotating the freezer fan 28. (27), a refrigerating compartment fan 29 for blowing air to the evaporator 25 for the refrigerating compartment (which may be referred to as a "first cooling fan") and a first motor 30 for rotating the refrigerating compartment fan 29 ) May be further included.

In the present invention, a series of cycles in which the refrigerant flows through the compressor 21, the condenser 22, the expansion member 23 and the evaporator 24 for the freezer is called a "freezing cycle", and the refrigerant is the compressor 21, The series of cycles flowing through the condenser 22, the expansion member 23 and the evaporator 25 for the refrigerator compartment will be referred to as a "refrigeration cycle".

And, "refrigeration cycle is activated" means that the compressor 21 is turned on, the refrigerator compartment fan 29 is rotated, and the refrigerant flows through the evaporator 25 for the refrigerator compartment by the switching valve 26, It means that the refrigerant and air flowing through the evaporator 25 for the refrigerating chamber are exchanged.

In addition, "refrigeration cycle is activated" means that the compressor 21 is turned on, the freezer fan 298 is rotated, and the refrigerant flows through the evaporator 24 for the freezer compartment by the switching valve 26, while the freezer is frozen. It means that the refrigerant flowing through the practical evaporator 24 and the air exchange heat.

In the above description, it has been described that one expansion member 23 is located upstream of the switching valve 26. Alternatively, however, the first expansion member between the switching valve 26 and the evaporator 24 for the refrigerating compartment Is provided, it is also possible to be provided with a second expansion member between the switching valve 26 and the evaporator 25 for the freezer.

As another example, the switching valve 26 is not used, a refrigerating chamber valve (first valve) is provided at the inlet side of the evaporator 25 for the refrigerating chamber, and an inlet side of the evaporator 24 for the freezing chamber is provided. It is also possible to be provided with a valve for a freezer (second valve). In addition, when the refrigeration cycle is operated, the valve for the freezer may be turned on, the valve for the refrigeration compartment may be turned off, and when the refrigeration cycle is operated, the valve for the freezer compartment may be turned off, and the valve for the refrigerator compartment may be turned on.

The refrigerator 1 includes a freezer compartment temperature sensor 41 for sensing the temperature of the freezer compartment 111, a freezer compartment temperature sensor 42 for sensing the temperature of the refrigerator compartment 112, and the freezer compartment 111. Cooling cycle (freezing cycle) based on the input unit (not shown) capable of inputting the set temperature (or target temperature) of each of the refrigerating compartment 112 and the temperature detected by the input set temperature and the temperature sensors 41 and 42. And a refrigeration cycle).

In addition, the refrigerator 1 includes a first evaporator sensor 43 for sensing the temperature of the evaporator 25 for the refrigerator compartment or the temperature around the evaporator 25 for the refrigerator compartment, and the temperature of the evaporator 24 for the freezer compartment. Alternatively, a second evaporator sensor 44 for sensing the temperature around the evaporator 24 for the freezer may be further included.

In this specification, a temperature lower than the set temperature of the freezer 111 is referred to as a first freezer reference temperature (or a third reference temperature), and a temperature higher than a set temperature of the freezer 111 is referred to as a second freezer reference temperature (or (4th reference temperature). In addition, a range between the first freezer reference temperature and the second freezer reference temperature may be referred to as a set temperature range of the freezer.

Although not limited, the set temperature of the freezer 111 may be an average temperature of the first freezer reference temperature and the second freezer reference temperature.

In addition, in the present specification, a temperature lower than a set temperature of the refrigerator compartment 112 is referred to as a first refrigerator compartment reference temperature (or a first reference temperature), and a temperature higher than a set temperature of the refrigerator compartment 112 is referred to as a second refrigerator compartment reference temperature. It can be called (second reference temperature). In addition, a range between the first refrigerator compartment reference temperature and the second refrigerator compartment reference temperature may be referred to as a set temperature range of the refrigerator compartment.

Although not limited, the set temperature of the refrigerating chamber 112 may be an average temperature of the first refrigerating chamber reference temperature and the second refrigerating chamber reference temperature.

In the present invention, the user can set the set temperature of each of the freezing chamber 111 and the refrigerating chamber 112.

The control unit 50 may control the temperature of the refrigerating chamber 112 to be maintained within a range of temperature satisfactory sections belonging to the refrigerating chamber set temperature range. Alternatively, the control unit 50 may allow the temperature of the freezer 111 to be maintained within a range of temperature satisfaction sections that fall within the freezer set temperature range.

At this time, the upper limit temperature of the temperature satisfaction section may be set equal to or lower than the reference temperature of the second refrigerator compartment, and the lower limit temperature may be set equal to or higher than the reference temperature of the first refrigerator compartment.

In the present invention, the control unit 50 may control the first refrigeration cycle, the refrigeration cycle, the second refrigeration cycle, and the pump down operation to form one operation cycle. Alternatively, in the present invention, the control unit 50 may control the first refrigeration cycle, the refrigeration cycle, the second refrigeration cycle, the pump down operation, and a constant time stop of the compressor to form one operation cycle.

In this embodiment, the refrigerating chamber 112 may be referred to as a first storage chamber, and the freezing chamber 111 may be referred to as a second storage chamber.

In addition, in the present embodiment, the first refrigeration cycle is a cooling cycle for cooling the first storage compartment, and may be referred to as a first cooling cycle.

In addition, in this embodiment, the refrigeration cycle is a cooling cycle for cooling the second storage compartment, and may be referred to as a second cooling cycle.

In addition, in the present embodiment, the second refrigeration cycle may be referred to as a third cooling cycle as a cooling cycle for cooling the first storage compartment.

In this embodiment, the pump down operation operates the compressor 21 in a state where the supply of refrigerant to all of the plurality of evaporators 24 and 25 is blocked, so that the refrigerant remaining in each of the evaporators 24 and 25 is compressor 21 ) Means driving.

The control unit 50 may operate the first refrigeration cycle, and when the stop condition of the first refrigeration cycle (also referred to as a start condition of the refrigeration cycle) is satisfied, the refrigeration cycle may be operated.

In addition, if the stop condition of the refrigeration cycle is satisfied while operating the refrigeration cycle, the control unit 50 may operate the second refrigeration cycle. Then, when the stop condition of the second refrigeration cycle is satisfied, the pump down operation may be performed.

In this embodiment, the smaller the width of the set temperature range, the smaller the temperature change width of the food, so that the freshness of the food is improved. However, the smaller the width of the set temperature range, the shorter the switching cycle of the switching valve 26 and the shorter the cycle of the pump down operation.

However, since the pump-down operation is not an operation for cooling the storage chamber, when the pump-down operation period is short, it means that the pump-down operation time is relatively increased.

Therefore, in this embodiment, as an example, by controlling the refrigerating compartment fan 29, a control method of a refrigerator for reducing power consumption is disclosed.

Meanwhile, the refrigerator 1 of the present invention may further include a memory 45 in which temperatures of each of the freezer compartment 111 and the refrigerator compartment 112 are stored during the operation of the cooling cycle.

In addition, a reference temperature value for output control of the cooling fans 28 and 29 to be described later may be stored in the memory 45.

Hereinafter, the control method of the refrigerator of the present invention will be described.

3 is a flowchart schematically illustrating a control method of a refrigerator according to an embodiment of the present invention, and FIG. 4 is a diagram showing a change in the temperature of the refrigerator and the output of the refrigerator during operation of the cooling cycle. This diagram shows the temperature change of the evaporator for the refrigerating chamber during the cooling cycle operation.

3 to 5, the power of the refrigerator 1 is turned on (S1). When the power of the refrigerator 1 is turned on, the refrigerator 1 may be operated to cool the freezer compartment 111 or the refrigerator compartment 112.

Hereinafter, a method of controlling a refrigerator when cooling the freezer compartment 111 after cooling the refrigerator compartment 112 will be described as an example.

In order to cool the refrigerating chamber 112, the control unit 50 operates a first refrigerating cycle (S2).

For example, the control unit 50 may turn on the compressor 21 and rotate the refrigerator compartment fan 29. Then, the switching valve 26 is switched to the first state so that the refrigerant flows to the evaporator 25 for the refrigerator compartment. Alternatively, the valve for the refrigerator compartment may be turned on and the valve for the refrigerator compartment may be turned off.

The refrigerator compartment fan 29 in the first refrigeration cycle may be operated with a first reference output. In this specification, the output of the refrigerator compartment fan 29 may be, for example, the number of revolutions. Therefore, output adjustment of the refrigerator compartment fan 29 may mean adjustment of the number of revolutions.

In addition, when the first refrigeration cycle is operated, the freezer fan 28 is maintained in a stopped state.

Then, the refrigerant compressed by the compressor 21 and passed through the condenser 22 flows through the switching valve 26 to the evaporator 25 for the refrigerator compartment. Then, the refrigerant evaporated while flowing the evaporator 25 for the refrigerating chamber flows into the compressor 21 again.

In addition, air exchanged with the evaporator 25 for the refrigerating compartment is supplied to the refrigerating compartment 112. Therefore, while the temperature of the refrigerating chamber 112 is lowered, the temperature of the freezing chamber 111 is increased.

While the first refrigeration cycle is operating, the control unit 50 determines whether a stop condition of the first refrigeration cycle is satisfied (S3). That is, the control unit 50 determines whether the start condition of the refrigeration cycle is satisfied.

For example, when the temperature of the refrigerator compartment 112 is lower than or equal to the reference temperature (-Diff) of the first refrigerator compartment, the controller 50 may determine that the refrigeration cycle stop condition is satisfied.

As a result of the determination in step S3, when it is determined that the stop condition of the refrigeration cycle is satisfied, the control unit 50 operates the refrigeration cycle (S4).

For example, the control unit 50 switches the switching valve 26 to the second state so that the refrigerant flows to the evaporator 24 for the freezer. Alternatively, the valve for the freezer is turned on and the valve for the freezer is turned off. Then, the freezer fan 28 is operated.

However, even if the first refrigeration cycle is switched to the refrigeration cycle, the compressor 21 is continuously operated without being stopped.

In addition, even if the first refrigeration cycle is switched to the refrigeration cycle, the refrigerating compartment fan 29 continues to operate without being stopped.

In addition, the freezer fan 28 may operate at the same time that the refrigerator compartment fan 29 is stopped or after the refrigerator compartment fan 29 is stopped.

If the refrigerating compartment fan 29 continues to operate even after the first refrigeration cycle is stopped, air is cooled by latent heat of evaporation of the evaporator 25 for the refrigerating compartment to cool the refrigerating compartment 112.

Therefore, even when the first refrigeration cycle is stopped, the refrigerating chamber 112 may be cooled, and the temperature rise of the refrigerating chamber 112 may be delayed.

In this case, referring to FIG. 5, after the first refrigeration cycle is stopped, the temperature of the evaporator 25 for the refrigerating compartment increases as time passes by the operation of the refrigerating compartment fan 29.

When the temperature of the evaporator 25 for the refrigerating chamber rises, a difference in temperature between the temperature of the refrigerating chamber 112 and the evaporator 25 for the refrigerating chamber may decrease, thereby reducing heat exchange efficiency. If the refrigerator compartment fan 29 is operated while the output of the refrigerator compartment fan 29 is maintained in a state in which the heat exchange efficiency is reduced, power is unnecessarily consumed.

Therefore, in the present embodiment, in consideration of the temperature rise of the evaporator 25 for the refrigerator compartment, in the course of the operation of the refrigeration cycle, it is possible to control the output of the refrigerator compartment fan 29 to be reduced.

For example, the output of the refrigerator compartment fan 29 may be gradually reduced until it is stopped (see the power saving section in FIG. 4 ).

However, after the refrigeration cycle is operated, when the refrigerator door is opened, the defrosting operation for defrosting of the evaporator is started, or the set temperature is changed through the input unit, the temperature of the refrigerating chamber 112 reaches a predetermined temperature. The control for reducing the output of the refrigerator compartment fan 29 is not performed until.

In the above case, since there is a high possibility that the temperature of the refrigerator compartment 112 increases, the control of controlling the reduction of the output of the refrigerator compartment fan 29 is not performed, and the refrigerator compartment fan 29 is returned to normal output. Let it work.

[First example of output control of the refrigerating compartment fan during the freezing cycle operation]

During the operation of the refrigeration cycle, the output of the refrigerator compartment fan 29 may be reduced stepwise based on the temperature detected by the first evaporator sensor 43.

For example, the refrigerator compartment fan 29 may operate as a first initial output when the refrigeration cycle is operated.

In addition, in the process of the refrigerator compartment fan 29 operating as the first initial output, if the temperature detected by the first evaporator sensor 43 is higher than the first reference temperature value, the refrigerator compartment fan 29 is the first 1 Can operate with a first reduced power lower than the initial power.

And, in the process of the refrigerating compartment fan 29 operating as the first reduction output, if the temperature detected by the first evaporator sensor 43 is higher than the second reference temperature value greater than the first reference temperature value, the The refrigerator compartment fan 29 may operate with a second reduction output lower than the first reduction output.

In addition, when the temperature detected by the first evaporator sensor 43 is higher than the third reference temperature value greater than the second reference temperature value in the process of the refrigerator compartment fan 29 operating as the second reduction output, the refrigerator compartment fan (29) may be stopped or operated with a third reduction output lower than the second reduction output.

If the refrigerating compartment fan 29 is operated with the third reduction output, the refrigerating compartment fan 29 may be turned off after a predetermined time has elapsed.

In this embodiment, the output of the refrigerating compartment fan 29 may be reduced at least twice or more from the first initial output.

For example, the first initial output may be the same as or smaller than the first reference output.

When the first initial output is smaller than the first reference output, a first difference value between the first reference output and the first initial output is greater than a second difference value between the first reference output and the first reduced output. It can be smaller or equal.

That is, the output reduction width from the first initial output to the first reduction output is greater than or equal to the output reduction width from the first reference output to the first initial output.

In addition, the second difference value between the first initial output and the first reduction output may be less than or equal to a third difference value between the first reduction output and the second reduction output.

That is, the output reduction width from the first reduction output to the second reduction output is greater than or equal to the output reduction width from the first initial output to the first reduction output.

In summary, in this embodiment, the output of the refrigerating chamber fan 29 may be gradually reduced, and the output reduction width may be increased or constant.

In this embodiment, the difference value between the first reference temperature value and the second reference temperature value may be set equal to or larger than the difference value between the second reference temperature value and the third reference temperature value.

For example, since the temperature of the evaporator for the refrigerating compartment after the start of the refrigeration cycle is the lowest, the first initial output is set to be the highest compared to other reduction outputs, and operates as the first initial output, in order to utilize the latent heat of evaporation to the maximum The reference temperature values may be set such that the time is longer than the time at which the remaining reduction output operates. These reference temperature values may be stored in the memory 45.

According to this embodiment, the power of the refrigerating compartment fan 29 can be reduced stepwise, thereby reducing power consumption.

[Second example of output control of the refrigerating compartment fan during the freezing cycle operation]

During the operation of the refrigeration cycle, the output of the refrigerator compartment fan 29 may be reduced stepwise based on the temperature detected by the first evaporator sensor 43 and the refrigerator compartment temperature detected by the refrigerator compartment temperature sensor 42. .

Referring to FIG. 5, after the operation of the refrigeration cycle starts, the temperature of the refrigerator compartment 112 decreases and rises, and the temperature sensed by the first evaporator sensor 43 increases and is maintained at a constant temperature.

That is, after the start of the operation of the refrigeration cycle, the difference value between the temperature of the refrigerator compartment 112 and the temperature detected by the first evaporator sensor 43 is gradually reduced.

Therefore, the output of the refrigerator compartment fan 29 may be reduced stepwise based on a difference between the temperature detected by the first evaporator sensor 43 and the temperature detected by the refrigerator compartment temperature sensor 42, for example. have.

The refrigerator compartment fan 29 may operate as a first initial output when the refrigeration cycle is operated.

In addition, in the process of the refrigerator compartment fan 29 operating as the first initial output, a difference between the temperature detected by the first evaporator sensor 43 and the temperature detected by the refrigerator compartment temperature sensor 42 is first. If it is smaller than the reference difference value, the refrigerator compartment fan 29 may operate with a first reduction output lower than the first initial output.

In addition, in the process of the refrigerator compartment fan 29 operating as the first reduction output, a difference between the temperature detected by the first evaporator sensor 43 and the temperature detected by the refrigerator compartment temperature sensor 42 is second. If less than the reference difference value, the refrigerator compartment fan 29 may operate with a second reduction output lower than the first reduction output. At this time, the second reference difference value is smaller than the first reference difference value.

In addition, in the process of the refrigerator compartment fan 29 operating as the second reduction output, the difference between the temperature detected by the first evaporator sensor 43 and the temperature detected by the refrigerator compartment temperature sensor 42 is third. If it is smaller than the reference difference value, the refrigerator compartment fan 29 may be stopped or operate with a third reduction output lower than the second reduction output.

At this time, the third reference difference value is smaller than the second reference difference value. If the refrigerating compartment fan 29 is operated with the third reduction output, the refrigerating compartment fan 29 may be turned off after a predetermined time has elapsed.

At this time, when the operation time of the refrigerator compartment fan 29 reaches a time limit, the control of the refrigerator compartment fan 29 ends. That is, if the operating time of the refrigerator compartment fan 29 reaches a time limit even when the refrigerator compartment fan 29 is operating with the first initial output, the first reduced output, or the second reduced output, the refrigerator compartment fan 29 Can be turned off.

For example, the first initial output may be the same as or smaller than the first reference output.

When the first initial output is smaller than the first reference output, a difference value between the first reference output and the first initial output may be less than or equal to a difference value between the first initial output and the first reduced output. have.

That is, the output reduction width from the first initial output to the first reduction output is greater than or equal to the output reduction width from the first reference output to the first initial output.

In addition, a difference value between the first initial output and the first reduction output may be less than or equal to a difference value between the first reduction output and the second reduction output.

That is, the output reduction width from the first reduction output to the second reduction output is greater than or equal to the output reduction width from the first initial output to the first reduction output.

In summary, in this embodiment, the output of the refrigerating chamber fan 29 may be gradually reduced, and the output reduction width may be increased or constant.

In this embodiment, the difference value between the first reference difference value and the second reference difference value may be set equal to or larger than the difference value between the second reference difference value and the third reference difference value.

[The third example of the output control of the refrigerating chamber fan during the freezing cycle operation]

During the operation of the refrigeration cycle, the output of the refrigerator compartment fan 29 may be reduced stepwise based on the refrigerator compartment temperature detected by the refrigerator compartment temperature sensor 42.

Referring to FIG. 5, after the operation of the refrigeration cycle starts, the temperature of the refrigerating chamber 112 decreases and then rises.

Accordingly, the output of the refrigerator compartment fan 29 may be gradually reduced based on a comparison result of a temperature and a set value detected by the refrigerator compartment temperature sensor 42.

The refrigerator compartment fan 29 may operate as a first initial output when the refrigeration cycle is operated.

In the process of the refrigerator compartment fan 29 operating as the first initial output, if the temperature detected by the refrigerator compartment temperature sensor 42 is less than a first set value, the refrigerator compartment fan 29 is the first. It can operate with a first reduced output lower than the initial output.

Then, in the process of the refrigerator compartment fan 29 operating as the first reduction output, if the temperature detected by the refrigerator compartment temperature sensor 42 is less than the second set value, the refrigerator compartment fan 29 is the first It can operate with a second reduction power lower than the reduction power. At this time, the second set value is smaller than the first set value.

And, in the process of the refrigerating compartment fan 29 operating as the second reduction output, if the temperature detected by the refrigerating compartment temperature sensor 42 is less than a third set value, the refrigerating compartment fan 29 is stopped or the It can operate with a third reduction output lower than the second reduction output. At this time, the third set value is smaller than the second set value.

If the refrigerating compartment fan 29 is operated with the third reduction output, the refrigerating compartment fan 29 may be turned off after a predetermined time has elapsed.

At this time, when the operation time of the refrigerator compartment fan 29 reaches a time limit, the control of the refrigerator compartment fan 29 ends. That is, if the operating time of the refrigerator compartment fan 29 reaches a time limit even when the refrigerator compartment fan 29 is operating with the first initial output, the first reduced output, or the second reduced output, the refrigerator compartment fan 29 Can be turned off.

For example, the first initial output may be the same as or smaller than the first reference output.

When the first initial output is smaller than the first reference output, a difference value between the first reference output and the first initial output may be less than or equal to a difference value between the first initial output and the first reduced output. have.

That is, the output reduction width from the first initial output to the first reduction output is greater than or equal to the output reduction width from the first reference output to the first initial output.

In addition, a difference value between the first initial output and the first reduction output may be less than or equal to a difference value between the first reduction output and the second reduction output.

That is, the output reduction width from the first reduction output to the second reduction output is greater than or equal to the output reduction width from the first initial output to the first reduction output.

In summary, in this embodiment, the output of the refrigerating chamber fan 29 may be gradually reduced, and the output reduction width may be increased or constant.

In this embodiment, the difference value between the first set value and the second set value may be set equal to or larger than the difference value between the second set value and the third set value.

In the above three examples, in common, the output of the refrigerator compartment fan 29 is not stopped after being gradually reduced, but is continuously stopped until the stop condition of the second cooling cycle is satisfied with the minimum output (eg, the third reduction output). It is also possible to work.

On the other hand, when the refrigeration cycle is operated, the temperature of the freezing chamber 111 decreases, and the temperature of the refrigerating chamber 112 rises.

The output of the compressor 21 when the refrigeration cycle is operating is greater than the output of the compressor 21 when the first refrigeration cycle is operating.

That is, in the first refrigeration cycle, the compressor 21 operates as a first output, and when the refrigeration cycle starts, the compressor 21 may operate as a second output greater than the first output.

Then, the control unit 50 may determine whether a stop condition of the freezing cycle is satisfied during the operation of the freezing cycle (S5).

For example, when the temperature of the freezing chamber 111 is lower than the reference temperature of the first refrigerating chamber, the freezing cycle may be stopped.

When the refrigeration cycle is stopped, the second refrigeration cycle may be operated (S6).

For example, the control unit 50 switches the switching valve 26 to the first state so that the refrigerant flows into the evaporator 25 for the refrigerator compartment.

In addition, the control unit 50 may stop the freezer fan 28 and operate the refrigerator compartment fan 29.

However, even if the refrigeration cycle is switched to the second refrigeration cycle, the compressor 21 is continuously operated without being stopped.

At this time, the output of the compressor 21 in the second refrigeration cycle is smaller than the output of the compressor 21 in the refrigeration cycle.

That is, in the refrigeration cycle, the compressor 21 operates at a second output, and when the second refrigeration cycle starts, the compressor 21 may operate at a third output smaller than the second output.

The primary purpose of the first refrigerating cycle is to lower the temperature of the refrigerating chamber 112, and the primary purpose of the second refrigerating cycle is to delay the temperature rise of the refrigerating chamber 112 before the pump down operation. Accordingly, the third output may be the same as or smaller than the first output.

However, in the operation of the second refrigeration cycle, the output of the compressor 21 may be maintained or reduced to the third output.

When the second refrigeration cycle is operated, the refrigerating compartment fan 29 may operate as a second reference output.

As an example, the second reference output may be the same as the first reference output. In this embodiment, the purpose of the second refrigeration cycle is to delay the temperature rise of the refrigerating chamber 112.

Therefore, in the second refrigeration cycle, the second reference output is the same as the first reference output, so that the temperature of the refrigerating chamber 112 is rapidly lowered.

The second reference output may be kept constant until the second refrigeration cycle is stopped.

Alternatively, the second reference output may be reduced or increased one or more times until the second refrigeration cycle is stopped.

For example, when the second refrigeration cycle is operated, the refrigerating compartment fan 29 operates as the second reference output, and when the temperature of the refrigerating compartment 112 becomes lower than a reduction reference value, the refrigerating compartment fan 29 is It can operate with a reduced output than the second reference output.

In this case, the reduction reference value may be, for example, a set temperature of the refrigerator compartment.

As another example, the output of the refrigerator compartment fan 29 during the second refrigeration cycle operation may be determined based on the temperature of the refrigerator compartment 112.

If the temperature of the refrigerator compartment 112 is higher than a preset temperature of the refrigerator compartment during the second refrigeration cycle operation, the refrigerator compartment fan 29 may operate as a second reference output. In this case, the second reference output may be the same as or higher than the first reference output.

On the other hand, when the temperature of the refrigerator compartment 112 is lower than the set temperature of the refrigerator compartment during the second refrigeration cycle operation, the refrigerator compartment fan 29 may operate with a third reference output smaller than the second reference output. The third reference output is lower than the first reference output, and may be, for example, a minimum output.

In addition, while the temperature of the refrigerating chamber 112 is higher than the set temperature of the refrigerating chamber and the refrigerating chamber fan 29 is operating as the second reference output, the temperature of the refrigerating chamber 112 is lower than the set temperature of the refrigerating chamber. Once, the refrigerating compartment fan 29 may operate as the third reference output.

As another example, when the temperature of the refrigerator compartment 112 is higher than a first reduction reference value during the second refrigeration cycle operation, the refrigerator compartment fan 29 may operate as a second reference output (eg, maximum output). have.

In this case, the first reduction reference value may be a value greater than the set temperature of the refrigerating chamber 112. In addition, the second reference output may be the same output as the first reference output or a large output.

On the other hand, when the temperature of the refrigerating compartment 112 is higher than the second reduction reference value during the second refrigeration cycle operation, the refrigerating compartment fan 29 has a reduced third reference output than the second reference output (eg, an intermediate output). Im). At this time, the second reduction reference value is smaller than the set temperature of the refrigerating chamber 112 and greater than the first cooling chamber reference luck. The third reference output is an output smaller than the first reference output.

In addition, when the temperature of the refrigerator compartment 112 is lower than the second reduction reference value during the second refrigeration cycle operation, the refrigerator compartment fan 29 has a fourth reference output that is reduced than the third reference output (eg, the minimum output) Im). At this time, the fourth reference output is an output greater than zero.

The control unit 50 may determine whether the stop condition of the second refrigeration cycle is satisfied during the operation of the second refrigeration cycle (S7).

For example, when the operation time of the second refrigeration cycle (or the operating time of the refrigerating compartment fan 29) reaches a stop reference time, it may be determined that the stop condition of the second refrigeration cycle is satisfied.

When the second refrigeration cycle is stopped, the pump down operation may be performed (S8). The output of the compressor 21 during the pump down operation may be the same as the output of the compressor 21 when the refrigeration cycle is operated.

During the pump down operation, the compressor 21 is kept on, and upon completion of the pump down, the compressor 21 is turned off.

Then, the switching valve 26 may be switched to a third state so that refrigerant is not supplied to each of the evaporators 24 and 25. Alternatively, the valve for the refrigerator compartment and the valve for the refrigerator compartment may be turned off.

On the other hand, even if the pump down operation is started, the refrigerator compartment fan 29 is not stopped and is continuously operated.

In the present embodiment, when the pump down operation ends, the compressor 21 is stopped, but the refrigerator compartment fan 29 may be stopped after the compressor 21 is stopped.

When the compressor 21 is stopped after the pump down operation is finished, the temperature of the refrigerating chamber 112 may increase. Therefore, in the present embodiment, the refrigerator compartment fan 29 may operate even after the compressor 21 is stopped to delay the temperature rise of the refrigerator compartment 112.

Therefore, for convenience of explanation, an operation section of the second refrigeration cycle is referred to as a first constant temperature section, and a section from a start point of the pump down to a time when the refrigerator compartment fan 29 is stopped is referred to as a second constant temperature section. Can.

In addition, a section from the start of the refrigeration cycle to the time when the refrigerator compartment fan 29 is stopped may be referred to as a power saving section.

In the second constant temperature section, the refrigerating compartment fan 29 operates as a second initial output, and output may be reduced in stages.

For example, the second initial output may be the same as or lower than the second reference output in the first constant temperature section.

[First example of output control of the refrigerating compartment fan in the second constant temperature section]

In the second constant temperature section, the output of the refrigerating compartment fan 29 may be gradually reduced based on the temperature detected by the first evaporator sensor 43.

For example, the refrigerating compartment fan 29 may operate as a second initial output when the refrigeration cycle is operated.

And, in the process of the refrigerating compartment fan 29 operating as the second initial output, if the temperature detected by the first evaporator sensor 43 is higher than the fourth reference temperature value, the refrigerating compartment fan 29 is the first It can operate with 4th reduction output lower than 2 initial output.

And, in the process of the refrigerating compartment fan 29 operating as the fourth reduction output, if the temperature detected by the first evaporator sensor 43 is higher than the fifth reference temperature value greater than the fourth reference temperature value, the The refrigerating chamber fan 29 may operate with a fifth reduction output lower than the fourth reduction output.

In addition, when the temperature detected by the first evaporator sensor 43 is higher than the sixth reference temperature value greater than the fifth reference temperature value while the refrigerator compartment fan 29 operates as the fifth reduction output, the refrigerator compartment fan (29) may be stopped or operated with a sixth reduction output lower than the second reduction output.

If the refrigerator compartment fan 29 is operated with the sixth reduction output, the refrigerator compartment fan 29 may be turned off after a predetermined time has elapsed.

In this embodiment, the output of the refrigerator compartment fan 29 may be reduced at least twice or more from the second initial output.

For example, the second initial output may be the same as or smaller than the first initial output.

When the second initial output is smaller than the first initial output, a difference value between the first initial output and the second initial output may be less than or equal to a difference value between the second initial output and the fourth reduced output. have.

That is, the output reduction width from the second initial output to the fourth reduction output is greater than or equal to the output reduction width from the first initial output to the second initial output.

In addition, the difference value between the second initial output and the fourth reduction output may be less than or equal to a difference value between the fourth reduction output and the fifth reduction output.

That is, the output reduction width from the fourth reduction output to the fifth reduction output is greater than or equal to the output reduction width from the second initial output to the fourth reduction output.

In summary, in this embodiment, the output of the refrigerating chamber fan 29 may be gradually reduced, and the output reduction width may be increased or constant.

In this embodiment, the difference value between the fourth reference temperature value and the fifth reference temperature value may be set equal to or larger than the difference value between the fifth reference temperature value and the sixth reference temperature value.

Although not limited, the average output power (or average rotation speed) of the refrigerator compartment fan 29 in the second constant temperature section is smaller than the average power output (or average rotation speed) of the refrigerator compartment fan 29 in the power saving section. Can.

Alternatively, the length of the second constant temperature section may be shorter than the length of the power saving section (operation time of the refrigerator compartment fan in the power saving section).

Alternatively, the maximum value (for example, the third reference temperature value) among the reference temperature values in the power saving section may be equal to or greater than the minimum value (for example, the fourth reference temperature value) among the reference temperature values in the second constant temperature section. have.

Alternatively, the minimum value among the reference temperature values (eg, the fourth reference temperature value) in the second constant temperature section is greater than the minimum value among the reference temperature values (eg, the first reference temperature value) in the power saving section.

[Second example of output control of the refrigerating compartment fan in the second constant temperature section]

In the second constant temperature section, the output of the refrigerator compartment fan 29 may be gradually reduced based on the temperature detected by the first evaporator sensor 43 and the refrigerator compartment temperature detected by the refrigerator compartment temperature sensor 42. .

The output of the refrigerating compartment fan 29 may be reduced stepwise based on a difference between the temperature sensed by the first evaporator sensor 43 and the temperature sensed by the refrigerating compartment temperature sensor 42.

The refrigerator compartment fan 29 may operate as a second initial output when the refrigeration cycle is operated.

In addition, in the process of the refrigerator compartment fan 29 operating as the second initial output, the difference between the temperature detected by the first evaporator sensor 43 and the temperature detected by the refrigerator compartment temperature sensor 42 is fourth. If it is smaller than the reference difference value, the refrigerator compartment fan 29 may operate with a fourth reduction output lower than the second initial output.

In addition, in the process of the refrigerator compartment fan 29 operating as the fourth reduction output, a difference between the temperature detected by the first evaporator sensor 43 and the temperature detected by the refrigerator compartment temperature sensor 42 is the fifth. If it is smaller than the reference difference value, the refrigerator compartment fan 29 may operate with a fifth reduction output lower than the fourth reduction output. At this time, the fifth reference difference value is smaller than the fourth reference difference value.

In addition, in the process of the refrigerator compartment fan 29 operating as the fifth reduction output, a difference between the temperature detected by the first evaporator sensor 43 and the temperature detected by the refrigerator compartment temperature sensor 42 is sixth. If it is smaller than the reference difference value, the refrigerator compartment fan 29 may be stopped or operate with a sixth reduction output lower than the fifth reduction output.

At this time, the sixth reference difference value is smaller than the fifth reference difference value. If the refrigerator compartment fan 29 is operated with the sixth reduction output, the refrigerator compartment fan 29 may be turned off after a predetermined time has elapsed.

In this example, when the operating time of the refrigerator compartment fan 29 reaches the time limit in the second constant temperature section, control of the refrigerator compartment fan 29 is ended. That is, even if the refrigerator compartment fan 29 is operating at the second minimum output, the fourth reduction output, or the fifth reduction output, when the operation time of the refrigerator compartment fan 29 reaches a time limit, the refrigerator compartment fan 29 Can be turned off.

For example, the second initial output may be the same as or smaller than the first initial output.

When the second initial output is smaller than the first initial output, a difference value between the first initial output and the second initial output may be less than or equal to a difference value between the second initial output and the fourth reduced output. have.

That is, the output reduction width from the second initial output to the fourth reduction output is greater than or equal to the output reduction width from the first initial output to the second initial output.

In addition, the difference value between the second initial output and the fourth reduction output may be less than or equal to a difference value between the fourth reduction output and the fifth reduction output.

That is, the output reduction width from the fourth reduction output to the fifth reduction output is greater than or equal to the output reduction width from the second initial output to the fourth reduction output.

In this embodiment, the difference value between the fourth reference difference value and the fifth reference difference value may be set equal to or larger than the difference value between the fifth reference difference value and the sixth reference difference value.

In this example, although not limited, the average output (or average rotation) of the refrigerating compartment fan 29 in the second constant temperature section is higher than the average output (or average rotational speed) of the refrigerating compartment fan 29 in the power saving section. Number) can be small.

Alternatively, the length of the second constant temperature section may be shorter than the length of the power saving section (operation time of the refrigerator compartment fan in the power saving section).

Alternatively, the maximum value (for example, the first reference difference value) among the reference difference values in the power saving section is greater than the maximum value (for example, the fourth reference difference value) among the reference difference values in the second constant temperature section.

Alternatively, at least one of the reference difference values in the power saving section may be the same as at least one of the reference difference values in the second constant temperature section.

[The third example of the output control of the refrigerator compartment fan in the second constant temperature section]

In the second constant temperature section, the output of the refrigerator compartment fan 29 may be gradually reduced based on the temperature of the refrigerator compartment detected by the refrigerator compartment temperature sensor 42.

The refrigerating compartment fan 29 may operate as a second initial output when the refrigeration cycle is operated.

And, in the process of the refrigerating compartment fan 29 operating as the second initial output, if the temperature detected by the refrigerating compartment temperature sensor 42 is less than a fourth set value, the refrigerating compartment fan 29 is the second It can operate with a fourth reduced output lower than the initial output.

And, in the process of the refrigerating compartment fan 29 operating as the fourth reduction output, if the temperature detected by the refrigerating compartment temperature sensor 42 is less than a fifth set value, the refrigerating compartment fan 29 is the fourth It can operate with a fifth reduction output lower than the reduction output. At this time, the fifth set value is smaller than the fourth set value.

Then, in the process of the refrigerator compartment fan 29 operating as the fifth reduction output, if the temperature detected by the refrigerator compartment temperature sensor 42 is less than the sixth set value, the refrigerator compartment fan 29 is stopped or the It can operate with a sixth reduction output lower than the fifth reduction output. At this time, the sixth set value is smaller than the fifth set value.

If the refrigerator compartment fan 29 is operated with the sixth reduction output, the refrigerator compartment fan 29 may be turned off after a predetermined time has elapsed.

At this time, when the operating time of the refrigerator compartment fan 29 reaches the time limit in the second constant temperature section, the control of the refrigerator compartment fan 29 ends. That is, even if the refrigerator compartment fan 29 is operating at the second minimum output, the fourth reduction output, or the fifth reduction output, when the operation time of the refrigerator compartment fan 29 reaches a time limit, the refrigerator compartment fan 29 Can be turned off.

Although not limited, the second initial output may be the same as or smaller than the first initial output.

When the second initial output is smaller than the first initial output, a difference value between the first initial output and the second initial output may be less than or equal to a difference value between the second initial output and the fourth reduced output. have.

That is, the output reduction width from the second initial output to the fourth reduction output is greater than or equal to the output reduction width from the first initial output to the second initial output.

In addition, the difference value between the second initial output and the fourth reduction output may be less than or equal to a difference value between the fourth reduction output and the fifth reduction output.

That is, the output reduction width from the fourth reduction output to the fifth reduction output is greater than or equal to the output reduction width from the second initial output to the fourth reduction output.

In summary, in this embodiment, the output of the refrigerating chamber fan 29 may be gradually reduced, and the output reduction width may be increased or constant.

In this embodiment, the difference value between the fourth set value and the fifth set value may be set equal to or larger than the difference value between the fifth set value and the sixth set value.

In this example, although not limited, the average output (or average rotation) of the refrigerating compartment fan 29 in the second constant temperature section is higher than the average output (or average rotational speed) of the refrigerating compartment fan 29 in the power saving section. Number) can be small.

Alternatively, the length of the second constant temperature section may be shorter than the length of the power saving section (operation time of the refrigerator compartment fan in the power saving section).

Alternatively, the minimum value (for example, the third set value) among the set values in the power saving section is smaller than the minimum value (for example, the fourth reference temperature value) among the set values in the second constant temperature section.

Alternatively, at least one of the reference difference values in the power saving section may be the same as at least one of the reference difference values in the second constant temperature section.

On the other hand, as long as the pump down operation is completed, the compressor 21 is stopped, and the second constant temperature section is terminated, and the refrigerator compartment fan 29 is stopped, the power of the refrigerator 1 is not turned off. (S7), when the first refrigeration cycle start condition is satisfied, the control unit 50 operates the first refrigeration cycle again.

At this time, the pump down operation may be performed for a predetermined time.

In the above embodiment, after the operation of the refrigeration cycle is stopped, the freezing chamber fan 28 is described as being immediately stopped. Alternatively, unlike this, the delay in the temperature rise of the refrigeration cycle after the operation of the refrigeration cycle is stopped For this, the freezer fan 28 may be continuously operated. In this case, the output of the freezer fan 28 may be reduced stepwise. That is, the freezer compartment fan 28 can be controlled in the same way as the output control method of the refrigerator compartment fan 29 mentioned in the power saving section. Then, the refrigerator compartment fan 28 may be operated after the freezing compartment fan 28 is stopped.

Meanwhile, after the second refrigeration cycle is stopped, after the pump is performed, the compressor is not stopped, and the first refrigeration cycle may be performed immediately. In this case, the compressor 21 is continuously operated without stopping unless the power is turned off. Even in this case, the output control of the refrigerating compartment fan 29 described above may be applied as it is.

However, in the first operation cycle, the compressor 21 when the first refrigeration cycle is operated operates with a first cooling power (or output), and after the completion of the pump down operation of the first operation cycle, the second operation cycle is removed. When one refrigeration cycle is operated, the compressor 21 may operate with a second cooling power, which is the same or changed cooling power with the first cooling power.

At this time, the second cooling power of the compressor may be determined based on the temperature change of the refrigerating chamber 112 in the first operation cycle.

In addition, in the first operation cycle, the compressor 21 when the refrigeration cycle is operated operates with a third cooling power, and when the refrigeration cycle of the second operation cycle is operated, the siik compressor 21 is the third cooling power And the fourth cooling power, which is the same or changed cooling power. At this time, the fourth cooling power of the compressor may be determined based on the temperature change of the freezer 111 in the second operation cycle.

21: compressor 22: condenser
24: evaporator for freezer 25: evaporator for refrigerator
28: freezer fan 29: freezer fan
50: control

Claims (37)

A first cooling cycle for the first storage compartment is operated such that the compressor is operated, and the first cooling fan for the first storage compartment is operated;
When the stop condition of the first cooling cycle is satisfied, switching to a second cooling cycle for cooling of the second storage chamber to operate the compressor and operating a second cooling fan for cooling of the second storage chamber;
When the stop condition of the second cooling cycle is satisfied, switching to a third cooling cycle for cooling of the first storage compartment to operate the compressor, and operating the first cooling fan; And
When the stop condition of the third cooling cycle is satisfied, it includes the step of performing a pump down operation,
When switching from the first cooling cycle to the second cooling cycle, the first cooling fan continues to operate,
The output of the first cooling fan is controlled to be reduced during the second cooling cycle operation based on a change in temperature of at least one of the temperature of the first storage chamber and the temperature of the first evaporator to supply cold air to the first storage chamber. How to control the refrigerator. According to claim 1,
The control method of a refrigerator in which the output of the first cooling fan is gradually reduced during the second cooling cycle operation. According to claim 1,
The first cooling fan operates as a first initial output when the second cooling cycle is operated,
When the temperature of the first evaporator is higher than the first reference temperature value, the first cooling fan is a control method of a refrigerator that operates with a first reduction output lower than the first initial output. The method of claim 3,
In the process of the first cooling fan operating at the first reduction output, if the temperature of the first evaporator is higher than the second reference temperature value greater than the first reference temperature value, the first cooling fan reduces the first reduction A control method of a refrigerator operating with a second reduced output lower than the output. The method of claim 4,
When the temperature of the first evaporator is higher than the third reference temperature value greater than the second reference temperature value in the process of the first cooling fan operating at the second reduction output,
The first cooling fan is stopped,
When the set time elapses after operation with the third reduction output lower than the second reduction output, it is stopped or
The control method of the refrigerator continuously operating until the stop condition of the second cooling cycle is satisfied by the third reduction output. The method of claim 5,
During the pump-down operation, the first cooling fan operates as a second initial output, and the output of the first cooling fan is reduced by one or more times until it is stopped. The method of claim 6,
If the temperature of the first evaporator is higher than the fourth reference temperature value while the first cooling fan is operating with the second initial output, the first cooling fan operates with a fourth reduced output lower than the second initial output. How to control the refrigerator. The method of claim 7,
In the process of the first cooling fan operating at the fourth reduction output, if the temperature of the first evaporator is higher than the fifth reference temperature value greater than the fourth reference temperature value, the first cooling fan reduces the fourth reduction A control method of a refrigerator operating with a fifth reduced output lower than the output. The method of claim 8,
When the temperature of the first evaporator is higher than the sixth reference temperature value greater than the fifth reference temperature value in the process of the first cooling fan operating at the fifth reduction output,
The first cooling fan is stopped,
A control method of a refrigerator that stops when a set time elapses after operation with a sixth reduction output lower than the fifth reduction output. The method of claim 9,
The third reference temperature value may be the same as or greater than the fourth reference temperature value, or
The fourth reference temperature value is greater than the first reference temperature control method of the refrigerator. The method of claim 5,
The method of controlling a refrigerator, wherein a difference value between the first reference temperature value and the second reference temperature value is equal to or greater than a difference value between the second reference temperature value and the third reference temperature value. According to claim 1,
The first cooling fan operates as a first initial output when the second cooling cycle is operated,
In the process of the first cooling fan operating at the first initial output, if the difference between the temperature of the first evaporator and the temperature of the first storage chamber is less than a first reference difference value, the first cooling fan is the A control method of a refrigerator operating with a first reduction output lower than the first initial output. The method of claim 12,
In the process of the first cooling fan operating at the first reduction output, if the difference between the temperature of the first evaporator and the temperature of the first storage chamber is less than a second reference difference value, the first cooling fan is the Operates with a second reduction output lower than the first reduction output,
The second reference difference value is a control method of a refrigerator smaller than the first reference difference value. The method of claim 13,
If the difference between the temperature of the first evaporator and the temperature of the first storage chamber is smaller than the third reference difference value in the process of the first cooling fan operating with the second reduction output,
The first cooling fan is stopped,
When the set time elapses after operation with the third reduction output lower than the second reduction output, it stops.
The third reference difference value is smaller than the second reference difference value, the control method of the refrigerator. The method of claim 14,
During the pump-down operation, the first cooling fan operates as a second initial output, and the output of the first cooling fan is reduced by one or more times until it is stopped. The method of claim 15,
If the difference between the temperature of the first evaporator and the temperature of the first storage chamber is less than a fourth reference difference value while the first cooling fan is operating at the second initial output, the first cooling fan is the first cooling fan. 2 A control method of a refrigerator that operates with a fourth reduced power lower than the initial power. The method of claim 16,
In the process that the first cooling fan operates with the fourth reduction output,
If the difference value between the temperature of the first evaporator and the temperature of the first storage chamber is less than a fifth reference difference value smaller than the fourth reference difference value, the first cooling fan is a fifth reduction lower than the fourth reduction output A control method of a refrigerator operated by output. The method of claim 17,
In the process that the first cooling fan operates with the fifth reduction output,
If the difference value between the temperature of the first evaporator and the temperature of the first storage chamber is smaller than the sixth reference difference value smaller than the fifth reference difference value,
The first cooling fan is stopped,
A control method of a refrigerator that stops when a set time elapses after operation with a sixth reduction output lower than the fifth reduction output. The method of claim 18,
The first reference difference value is greater than the fourth reference difference value,
At least one of the first reference difference value to the second reference difference value, the control method of the same refrigerator as at least one of the fourth reference difference value to the sixth reference difference value. The method of claim 14,
The first reference difference value and the difference value between the second reference difference value are the same as or greater than the difference value between the second reference difference value and the third reference difference value. According to claim 1,
The first cooling fan operates as a first initial output when the second cooling cycle is operated,
If the temperature of the first storage room is lower than the first set value, the first cooling fan is a control method of a refrigerator that operates with a first reduction output lower than the first initial output. The method of claim 21,
In the process of the first cooling fan operating as the first reduction output, if the temperature of the first storage chamber is lower than the second set value, the first cooling fan is set to a second reduction output lower than the first reduction output. It works,
The second set value is less than the first set value of the refrigerator control method. The method of claim 22,
In the process of the first cooling fan operating as the second reduction output, if the temperature of the first storage chamber is lower than the third set value,
The first cooling fan is stopped,
When the set time elapses after operation with the third reduction output lower than the second reduction output, it stops.
The third set value is less than the second set value of the refrigerator control method. The method of claim 23,
During the pump-down operation, the first cooling fan operates as a second initial output, and the output of the first cooling fan is reduced by one or more times until it is stopped. The method of claim 24,
While the first cooling fan is operating with the second initial output, if the temperature of the first storage chamber is lower than a fourth set value, the first cooling fan operates with a fourth reduced output lower than the second initial output. How to control the refrigerator. The method of claim 25,
In the process that the first cooling fan operates with the fourth reduction output,
When the temperature of the first storage chamber is lower than the fifth set value smaller than the fourth set value, the first cooling fan operates as a fifth reduced output lower than the fourth reduced output. The method of claim 26,
In the process that the first cooling fan operates with the fifth reduction output,
If the temperature of the first storage chamber is lower than the sixth set value smaller than the fifth set value,
The first cooling fan is stopped,
A control method of a refrigerator that stops when a set time elapses after operation with a sixth reduction output lower than the fifth reduction output. The method of claim 23,
The method of controlling a refrigerator, wherein a difference value between the first set value and the second set value is equal to or greater than a difference value between the second set value and the third set value. According to claim 1,
The average output of the first cooling fan after the start of the pump down operation is greater than the average output of the first cooling fan in the second cooling cycle,
The operating method of the first cooling fan after the start of the pump-down operation, the control method of the refrigerator is greater than the operating time of the first cooling fan in the second cooling cycle. The method of claim 13 or 22,
When the operation time of the first cooling fan reaches a time limit while the first cooling fan is operating with the first initial output, the first reduction output, or the second reduction output, the first cooling fan is turned off. Control method. The method of claim 3, 12 or 21,
In the first cooling cycle, the first cooling fan operates with a first reference output,
The first initial output, the control method of the refrigerator equal to or smaller than the first reference output. According to claim 1,
In the third cooling cycle, the first cooling fan operates with a second reference output,
The second reference output is a control method of the refrigerator that is kept constant during the third cooling cycle operation or is reduced more than once. The method of claim 32,
When the third cooling cycle is operated, the first cooling fan operates with the second reference output,
When the temperature of the first refrigerating chamber is below a reduction reference value, the first cooling fan is a control method of a refrigerator that operates with a reduced output than the second reference output. The method of claim 32,
When the third cooling cycle is operated, when the temperature of the first storage chamber is higher than the set temperature of the first storage chamber, the first cooling fan operates as the second reference output,
When the temperature of the first storage compartment is lower than the set temperature of the first storage compartment, the first cooling fan operates as a third reference output smaller than the second reference output. The method of claim 32,
During the operation of the third cooling cycle, if the temperature of the first storage chamber is higher than the first reduction reference value, the first cooling fan operates as a second reference output,
When the temperature of the first storage chamber is higher than the second reduction reference value, the first cooling fan operates with a third reference output lower than the second reference output,
When the temperature of the first storage chamber is lower than the second reduction reference value, the first cooling fan operates as a fourth reference output lower than the third reference output,
The first reduction reference value is greater than the set temperature of the first storage room,
The second reduction reference value is a control method of the refrigerator smaller than the set temperature of the first storage room. A first cooling cycle for the first storage compartment is operated such that the compressor is operated, and the first cooling fan for the first storage compartment is operated;
When the stop condition of the first cooling cycle is satisfied, switching to a second cooling cycle for cooling of the second storage chamber to operate the compressor and operating a second cooling fan for cooling of the second storage chamber;
When the stop condition of the second cooling cycle is satisfied, a pump down operation is performed; And
After the pump down operation comprises the step of operating the first cooling cycle again,
When switching from the first cooling cycle to the second cooling cycle, the first cooling fan continues to operate,
The output of the first cooling fan is controlled to be reduced during the second cooling cycle operation based on a change in temperature of at least one of the temperature of the first storage chamber and the temperature of the first evaporator to supply cold air to the first storage chamber. How to control the refrigerator. A compressor for compressing the refrigerant;
A first evaporator receiving coolant from the compressor and generating cold air for cooling the first storage compartment;
A first cooling fan for supplying cold air to the first storage chamber;
A second evaporator receiving refrigerant from the compressor and generating cold air for a second storage compartment;
A second cooling fan for supplying cold air to the second storage chamber;
A valve that selectively opens one of a first refrigerant passage connecting a refrigerant to flow between the compressor and the first evaporator and a second refrigerant passage connecting a refrigerant to flow between the compressor and the second evaporator; And
It includes a control unit for controlling the first cooling fan, the second cooling fan and the valve,
The control unit operates the compressor and the first cooling fan to cool the first storage compartment,
When the cooling of the first storage chamber is completed, for cooling of the second storage chamber, the compressor and the second cooling fan are operated,
The control unit operates the first cooling fan in the cooling process of the second storage chamber,
A refrigerator controlling the output of the first cooling fan to be reduced based on a change in temperature of at least one of the temperature of the first storage chamber and the temperature of the first evaporator for supplying cold air to the first storage chamber.

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