KR20210120310A - Refrigerator and control method thereof - Google Patents

Abstract

Provided are a refrigerator capable of sensing hyper-condensation in a condenser based on a temperature difference between evaporators provided in each storage chamber, and controlling time for driving a radiation fan for cooling the condenser, and a control method thereof. In accordance with one embodiment, the refrigerator includes: a plurality of storage chambers; a plurality of evaporators; arranged in series with each other, and matched with the plurality of storage chambers respectively; a compressor compressing a refrigerant which evaporates through the plurality of evaporators; a condenser condensing the compressed refrigerant; a radiation fan cooling the condenser; a plurality of evaporator temperature sensors sensing the temperature of each of the plurality of evaporators; and a control part determining whether hyper-condensation occurs in the condenser based on the temperature difference between the plurality of evaporators, and controlling time for driving the radiation fan based on whether hyper-condensation occurs.

Description

Refrigerator and its control method

The present invention relates to a refrigerator including a condenser and a method for controlling the same.

BACKGROUND ART A refrigerator is a device for long-term storage of stored items such as food and beverages without spoiling, and the refrigerator is generally provided with a refrigerating compartment for refrigerated storage of stored items and a refrigerating compartment for freezing and storing stored items.

Such a refrigerator maintains the temperature of the storage compartment at a set target temperature by repeatedly performing a cooling cycle of compression-condensation-expansion-evaporation of the refrigerant. That is, based on the target temperature of each storage compartment, the refrigerator supplies air cooled by an evaporator provided to correspond to each storage compartment into each storage compartment so that the temperature of the storage compartment is maintained at the target temperature.

However, when overcondensation occurs in the condenser, the amount of circulating refrigerant may be reduced because the liquid refrigerant flows toward the condenser. Accordingly, the supply of liquid refrigerant to the evaporator is delayed to reduce cooling performance or delay cooling so that the temperature of the storage chamber is set to the target temperature. may not be maintained as

Provided are a refrigerator that detects overcondensation in a condenser based on a temperature difference between evaporators provided in each storage compartment, and controls a driving time of a heat dissipation fan for cooling the condenser, and a control method thereof.

A refrigerator according to an embodiment includes a plurality of storage compartments; a plurality of evaporators arranged in series with each other and corresponding to each of the plurality of storage chambers; a compressor for compressing the refrigerant evaporated through the plurality of evaporators; a condenser condensing the compressed refrigerant; a heat dissipation fan for cooling the condenser; a plurality of evaporator temperature sensors for sensing the temperature of each of the plurality of evaporators; and a control unit that determines whether overcondensation has occurred in the condenser based on a temperature difference between the plurality of evaporators, and controls a driving time of the heat dissipation fan based on whether overcondensation occurs.

When it is determined that overcondensation has occurred in the condenser, the control unit may adjust the off-time of the heat dissipation fan in a direction to increase.

The controller may determine that overcondensation has occurred in the condenser when the temperature difference between the plurality of evaporators is equal to or greater than a preset value.

The plurality of storage compartments may include a refrigerating compartment; and a freezing compartment, wherein the evaporator includes: a first evaporator receiving the refrigerant from the condenser and corresponding to the refrigerating compartment; and a second evaporator that receives the refrigerant from the first evaporator and corresponds to the freezing compartment, wherein the control unit overcondensation occurs in the condenser based on a temperature difference between the first evaporator and the second evaporator can decide whether

The controller may determine that overcondensation has occurred in the condenser when the temperature difference between the plurality of evaporators is maintained for a reference time equal to or greater than a preset reference value.

The controller may determine whether overcondensation has occurred in the condenser at preset time intervals.

The refrigerator may further include an outside air temperature sensor configured to measure an outside air temperature, and the controller may determine whether overcondensation has occurred in the condenser when the outside air temperature is equal to or less than a reference temperature.

The refrigerator may further include a plurality of refrigerator temperature sensors configured to measure interior temperatures of each of the plurality of storage compartments, wherein the control unit is configured to correspond to a reference evaporator located at an end of the plurality of evaporators based on a flow of refrigerant among the plurality of evaporators. It may be determined whether to initiate the step of determining the overcondensation in the condenser based on the furnace temperature in the reference storage room.

The controller may determine whether overcondensation has occurred in the condenser when the internal temperature of the refrigerator in the reference storage chamber is equal to or greater than the reference temperature.

The controller may determine whether the internal temperature of the refrigerator in the reference storage room is equal to or greater than a reference temperature when the compressor continuously operates for a preset time.

A plurality of storage chambers, a plurality of evaporators arranged in series with each other, corresponding to each of the plurality of storage chambers, a compressor for compressing the refrigerant evaporated through the plurality of evaporators, a condenser for condensing the compressed refrigerant, and heat dissipation for cooling the condenser The control method of the refrigerator according to an embodiment comprising a fan and a plurality of evaporator temperature sensors for sensing temperatures of each of the plurality of evaporators determines whether overcondensation has occurred in the condenser based on a temperature difference between the plurality of evaporators do; and controlling the driving time of the heat dissipation fan based on whether or not overcondensation occurs.

Controlling the driving time of the heat dissipation fan may include, when it is determined that overcondensation has occurred in the condenser, adjusting an off time of the heat dissipation fan in an increasing direction.

Determining whether overcondensation has occurred in the condenser may include determining that overcondensation has occurred in the condenser when a temperature difference between the plurality of evaporators is equal to or greater than a preset value.

The plurality of storage compartments may include a refrigerating compartment; and a freezing compartment, wherein the evaporator includes: a first evaporator receiving the refrigerant from the condenser and corresponding to the refrigerating compartment; and a second evaporator that receives the refrigerant from the first evaporator and corresponds to the freezing compartment, wherein determining whether overcondensation has occurred in the condenser is based on a temperature difference between the first evaporator and the second evaporator to determine whether overcondensation has occurred in the condenser; may include.

Determining whether overcondensation has occurred in the condenser may include determining that overcondensation has occurred in the condenser when the temperature difference between the plurality of evaporators is maintained above a preset reference value for a reference time.

Determining whether overcondensation has occurred in the condenser may include determining whether overcondensation has occurred in the condenser at a preset time interval.

The refrigerator further includes an outdoor temperature sensor for measuring an outdoor temperature, and determining whether overcondensation has occurred in the condenser includes determining whether overcondensation has occurred in the condenser if the outdoor temperature is less than or equal to a reference temperature; may include.

The refrigerator may further include a plurality of inner temperature sensors measuring inner temperatures of each of the plurality of storage compartments, and determining whether overcondensation has occurred in the condenser may include: and determining whether to start the step of determining the overcondensation in the condenser based on the internal temperature of the refrigerator in the reference storage chamber corresponding to the reference evaporator located in the .

Determining whether overcondensation has occurred in the condenser may include determining whether overcondensation has occurred in the condenser when the internal temperature of the refrigerator in the reference storage chamber is equal to or greater than the reference temperature.

The control method of the refrigerator may further include determining whether the internal temperature of the refrigerator in the reference storage compartment is equal to or greater than a reference temperature when the compressor is continuously operated for a preset time.

According to the refrigerator and the control method thereof according to an embodiment, by detecting overcondensation in the condenser based on the temperature difference between the evaporators provided in each storage compartment, and controlling the driving time of the heat dissipation fan for cooling the condenser, in each storage compartment to prevent deterioration of cooling performance.

1 is an external view of a refrigerator according to an embodiment of the present invention.
2 is a diagram illustrating a cooling device constituting a refrigerator according to an embodiment of the present invention.
3 is a control block diagram of a refrigerator according to an embodiment of the present invention.
4 is a diagram illustrating an example of an output of an evaporator temperature sensor according to an embodiment of the present invention.
5 is a diagram illustrating an operation of a heat dissipation fan according to an embodiment of the present invention.
6 is a view for explaining a case in which the refrigerator according to an embodiment of the present invention determines whether overcondensation occurs.
7 is a flowchart illustrating a case of reducing overcondensation in a condenser in a method of controlling a refrigerator according to an embodiment of the present invention.
8 is a flowchart illustrating a case of determining whether or not overcondensation occurs in a condenser in a method of controlling a refrigerator according to an embodiment of the present invention.

The configuration shown in the embodiments and drawings described in this specification is only a preferred example of the disclosed invention, and there may be various modifications that can replace the embodiments and drawings of the present specification at the time of filing of the present application.

Throughout this specification, when a part is "connected" with another part, this includes not only a case in which it is directly connected but also a case in which it is indirectly connected, and the indirect connection refers to being connected through a wireless communication network. include

In addition, the terms used herein are used to describe the embodiments, and are not intended to limit and/or limit the disclosed invention. The singular expression includes the plural expression unless the context clearly dictates otherwise. In this specification, terms such as "comprises" or "have" are intended to designate that the features, numbers, steps, operations, components, parts, or combinations thereof described in the specification exist, but one or more other features It does not preclude the possibility of the presence or addition of figures, numbers, steps, operations, components, parts, or combinations thereof.

In addition, terms including an ordinal number such as "first", "second", etc. used herein may be used to describe various elements, but the elements are not limited by the terms, and the terms are It is used only for the purpose of distinguishing one component from another. For example, without departing from the scope of the present invention, a first component may be referred to as a second component, and similarly, a second component may also be referred to as a first component.

In addition, terms such as "~ part", "~ group", "~ block", "~ member", and "~ module" may mean a unit for processing at least one function or operation. For example, the terms may mean at least one process processed by at least one hardware such as a field-programmable gate array (FPGA) / application specific integrated circuit (ASIC), at least one software stored in a memory, or a processor. have.

The signs attached to each step are used to identify each step, and these signs do not indicate the order between the steps, and each step is performed differently from the stated order unless the context clearly indicates a specific order. can be

Hereinafter, an embodiment according to the present invention will be described in detail with reference to the accompanying drawings.

1 is an external view of a refrigerator according to an embodiment of the present invention, and FIG. 2 is a view showing a cooling device constituting the refrigerator according to an embodiment of the present invention.

1 and 2 , a refrigerator 1 according to an embodiment includes a main body 10 forming the exterior of the refrigerator 1 , a storage compartment 11 for storing stored items, and cooling the storage compartment 11 . A cooling device 100 is included.

A duct (not shown) through which air cooled by the cooling device 100 flows is provided in the internal space of the body 10, and a machine room (not shown) in which a part of the cooling device 100 is installed in the lower portion of the body 10 city) is provided.

The main body 10 is provided with a plurality of storage chambers 11 for storing the stored material.

For example, as shown in FIG. 1 , the storage compartment 11 is partitioned left and right with an intermediate partition wall interposed therebetween to store a first storage compartment 11a corresponding to a refrigerating compartment for refrigerated storage of stored items and frozen storage of the stored material. It is divided into a second storage chamber 11b corresponding to a freezing chamber, and the front surface of the first storage chamber 11a and the second storage chamber 11b is opened.

However, the number of storage chambers 11 is not limited thereto, and two or more storage chambers 11 may be provided in the main body 10 separated by a partition wall, and the target temperature of each storage chamber 11 is set differently. can be Hereinafter, for convenience of description, two storage chambers 11a and 11b are provided in the main body 10 as an example.

A blowing fan 13 may be provided in each of the plurality of storage compartments 11 , and the blowing fan 13 circulates air between the duct inside the main body 10 and the storage compartment 11 . That is, the blower fan 13 supplies air cooled by the evaporator 180 provided in the duct to the storage chamber 11 and can be sucked into the duct provided with the evaporator 180 to cool the air in the storage chamber 11 . have.

For example, the blowing fan 13 is provided to correspond to the first storage chamber 11a and circulates air between the duct provided in the first storage chamber 11a and the first storage chamber 11a. A first blowing fan 13a. and a second blowing fan 13b provided to correspond to the second storage chamber 11b and circulating air between the duct provided in the second storage chamber 11b and the second storage chamber 11b.

In addition, each storage chamber 11 is provided with an internal temperature sensor 130 for sensing the temperature of the storage chamber 11 .

For example, as shown in FIG. 1 , the in-house temperature sensor 130 is provided in the first storage chamber 11a to sense the temperature of the first storage chamber 11a, and the temperature of the first storage chamber 11a will be described later. The first internal temperature sensor 130a provided to the controller and the second internal temperature sensor provided in the second storage chamber 11b to sense the temperature of the second storage chamber 11b and provide the temperature of the second storage chamber 11b to the controller (130b) may be included.

The in-house temperature sensor 130 may employ a thermistor whose electrical resistance changes according to temperature.

In addition, the main body 10 may be provided with a door 12 for shielding the storage chamber 11 with an open front from the outside air.

For example, the main body 10 may be provided with a first door 12a for shielding the first storage chamber 11a from outside air and a second door 12b for shielding the second storage chamber 11b from outside air.

The door 12 may be provided with a display unit for displaying operation information of the refrigerator 1 and an input unit for receiving an operation command from the user.

The cooling device 100 may include a compressor 150 , a condenser 160 , a heat dissipation fan 170 , an evaporator 180 , and an expansion valve 190 .

The compressor 150 is installed in the machine room 14 provided in the lower part of the main body 10 and uses the rotational force of the motor rotating by receiving electrical energy from the external air power source to convert the low-pressure gaseous refrigerant evaporated by the evaporator 180 to high pressure. and compressed to the condenser 160 .

The motor (not shown) of the compressor 150 receives a driving current under the control of a controller to be described later and rotates the rotating shaft through magnetic interaction between the rotor and the stator. As such, the rotational force generated by the motor is converted into linear motion by the piston (not shown) of the compressor 150, and the gaseous refrigerant can be compressed to a high pressure through the linear motion of the piston. In addition, the rotational force generated by the motor of the compressor 150 is transferred to the rotary blade connected to the rotary shaft of the motor, and the stick-slip phenomenon between the rotary blade and the container (not shown) of the compressor 150 is used. The gaseous refrigerant can be compressed to a high pressure.

The motor of the compressor 150 may employ an induction AC servo motor, a synchronous AC servo motor, a brushless direct current (BLDC) motor, or the like.

The refrigerant may circulate through the condenser 160 , the expansion valve 190 , and the evaporator 180 through the pressure of the compressor 150 . That is, the compressor 150 plays the most important role in the cooling device 100 for cooling the storage chamber 11 , and the driving of the cooling device 100 can be seen as driving the compressor 150 .

The condenser 160 may be installed in the machine room 14 provided in the lower part of the main body 10 or may be installed in the outside air of the main body 10 , specifically, the rear surface of the refrigerator 1 .

The gas phase refrigerant compressed by the compressor 150 passes through the condenser 160 and is condensed to change the state from the gas phase to the liquid phase. The refrigerant discharges latent heat to the condenser 160 in the process of being condensed. The latent heat of the refrigerant refers to heat energy emitted to the outside air by changing the state of the gaseous refrigerant cooled to the boiling point to the liquid refrigerant of the same temperature. In addition, the liquid refrigerant heated to the boiling point changes state to the gaseous refrigerant of the same temperature, and the heat energy absorbed from the outside air is also called latent heat.

As described above, since the temperature of the condenser 160 increases due to the latent heat emitted by the refrigerant, a separate heat dissipation fan 170 for cooling the condenser 160 is provided. That is, the refrigerator 1 may provide a heat dissipation fan 170 on one side of the condenser 160 .

The refrigerant condensed through the condenser 160 may be transferred to the evaporator 180 . For example, the refrigerant condensed through the condenser 160 passes through both the first evaporator 180a for cooling the first storage chamber 11a and the second evaporator 180b for cooling the second storage chamber 11b. can do.

The pressure of the refrigerant condensed through the condenser 160 is lowered by the expansion valve 190 . That is, the expansion valve 190 reduces the pressure to a pressure capable of causing evaporation by throttling the high-pressure liquid refrigerant. The throttling means that when the fluid passes through a narrow passage such as a nozzle or an orifice, the pressure decreases without heat exchange with the outside air.

In addition, the expansion valve 190 may adjust the amount of refrigerant provided to the evaporator 180 so that the refrigerant can absorb sufficient heat in the evaporator 180 . In addition, the opening and closing degree of the expansion valve 190 is controlled by a controller to be described later.

The expansion valve 190 may be located at the front end of the evaporator 180 based on the flow of the refrigerant. For example, the Pyeongchang valve 190 includes a first expansion valve 190a positioned at the front end of the first evaporator 180a and a second expansion valve 190b positioned at the front end of the second evaporator 180b. can do.

As described above, the evaporator 180 is provided in a duct provided in the inner space of the body 10 to evaporate the low-pressure liquid refrigerant decompressed by the expansion valve 190 . The liquid refrigerant absorbs latent heat from the evaporator 180 in the process of being evaporated. The evaporator 180 is cooled by depriving the refrigerant of thermal energy, and the air around the evaporator 180 is cooled by the cooled evaporator 180 .

In this case, the evaporator 180 may be provided as a plurality of evaporators 180a and 180b corresponding to each of the plurality of storage chambers 11 , and may be connected in series with each other. That is, the evaporator 180 may be provided in a number corresponding to the number of the storage chambers 11 , and may be arranged in series with each other.

For example, the evaporator 180 includes a first evaporator 180a provided in the first storage chamber 11a to cool the first storage chamber 11a, and a second storage chamber 11b provided in the second storage chamber 11b. A second evaporator 180b for cooling may be included, and the first evaporator 180a and the second evaporator 180b may be arranged in series with each other. That is, the refrigerant condensed through the condenser 160 may pass through the first evaporator 180a and be transferred to the second evaporator 180b.

The low-pressure gaseous refrigerant evaporated by the evaporator 180 is again provided to the above-described compressor 150, and the cooling cycle is repeated. That is, the refrigerant may circulate through the compressor 150 , the condenser 160 , and the evaporator 180 in sequence, and through this, the storage chamber 11 may be cooled.

If the amount of refrigerant circulated in such a cooling cycle is reduced, the liquid refrigerant evaporated in the evaporator 180 to perform heat exchange with air becomes insufficient, and as a result, cooling of the storage chamber 11 may be delayed or its cooling performance may be reduced. have.

Specifically, the condenser 160 may condense the gaseous refrigerant more than in the normal case when the temperature of the machine room 14 is lowered or the amount of heat exchange in the evaporator 180 is increased due to frequent opening and closing of the door 12 . . That is, when the temperature of the machine room 14 is lowered or the amount of heat exchange in the evaporator 180 is increased due to frequent opening and closing of the door 12, the temperature difference between the refrigerant and the heat exchange target increases, so that the refrigerant is condensed more than in the normal case. Overcondensation may occur.

In other words, when overcondensation occurs in the condenser 160 , the amount of refrigerant circulated in the cooling cycle may decrease and the liquid refrigerant supplied to the evaporator 180 may become insufficient. Due to the delay, the supply of cold air to the storage chamber 11 may be delayed.

When overcondensation occurs in the condenser 160 , the liquid refrigerant at the condenser 160 side may increase compared to the normal condition. That is, the amount of liquid refrigerant between the inlet (ⓐ) of the condenser 160 and the point (ⓑ) before entering the plurality of evaporators 180 is, as shown in FIG. 2 , the condenser 160 than the normal condition. may be more in the overcondensation conditions where overcondensation occurs in

On the contrary, when overcondensation occurs in the condenser 160 , the liquid refrigerant at the evaporator 180 side may be reduced compared to the normal condition. That is, the amount of liquid refrigerant between the point (©) entering the plurality of evaporators 180 and the point (ⓓ) discharged from the plurality of evaporators 180 is, as shown in FIG. 2, the condenser ( 160) may be less under hypercondensation conditions where overcondensation occurs.

That is, since the amount of refrigerant charged in the refrigerator 1 is constant, when overcondensation occurs on the condenser 160 side and the liquid refrigerant on the condenser 160 side increases, the liquid refrigerant on the evaporator 180 side becomes relatively insufficient. can

In this case, among the plurality of evaporators 180 connected in series with each other, the liquid refrigerant to be evaporated for heat exchange is insufficient in the evaporator (eg, 180b) located at the end of the refrigerant flow based on the flow of the refrigerant. The cooling performance in 11b) may be deteriorated.

The refrigerator 1 according to an embodiment may determine whether or not overcondensation has occurred in the condenser 160 based on the temperature difference between the plurality of evaporators 180 , and cools the condenser 160 to eliminate overcondensation. It is possible to control the heat dissipation fan 170 for

To this end, an evaporator temperature sensor 110 for sensing the temperature of each of the plurality of evaporators 180 is provided on one side of each of the plurality of evaporators 180 . In this case, the evaporator temperature sensor 110 may be a defrost sensor provided for defrosting.

For example, the evaporator temperature sensor 110 may include a first evaporator temperature sensor 110a that detects the temperature of the first evaporator 180a and a second evaporator temperature sensor 110b that senses the temperature of the second evaporator 180b. ) may be included.

The evaporator temperature sensor 110 may employ a thermistor whose electrical resistance changes according to temperature.

In addition, an outside air temperature sensor (not shown) for sensing the temperature of the outside air of the refrigerator 1 is provided on the outer wall of the main body 10 . The outdoor temperature sensor is installed to be spaced apart from the ground by a predetermined distance, and may be installed on an upper outer wall of the refrigerator 1 .

The outdoor temperature sensor 130 may employ a thermistor whose electrical resistance changes according to temperature.

Hereinafter, the control of the refrigerator 1 will be described in detail, and in particular, determining overcondensation in the condenser 160 and controlling the heat dissipation fan 170 to reduce overcondensation will be described in detail.

3 is a control block diagram of the refrigerator 1 according to an embodiment of the present invention.

Referring to FIG. 3 , a refrigerator 1 according to an embodiment includes an evaporator temperature sensor 110 capable of detecting the temperature of the evaporator 180 , and an outdoor temperature sensor capable of detecting the temperature of the outside air of the refrigerator 1 . The sensor 120, the internal temperature sensor 130 capable of detecting the temperature inside the storage chamber 11, and the heat dissipation fan 170 to determine overcondensation in the condenser 160 and reduce overcondensation. The control unit 140 may include a compressor 150 , a condenser 160 , a heat dissipation fan 170 , and an evaporator 180 .

Descriptions of the evaporator temperature sensor 110 , the outside air temperature sensor 120 , the inside temperature sensor 130 , the compressor 150 , the condenser 160 , the heat dissipation fan 170 , and the evaporator 180 that have already been described will be omitted.

The control unit 140 oversees the operation of the refrigerator 1 , and the control unit 140 controls each configuration of the refrigerator 1 so that the refrigerator 1 efficiently performs its functions.

The operation of the control unit 140 can be largely divided into a cooling operation for cooling the storage chamber 11 and an overcondensation response operation for determining the overcondensation of the condenser 160 and reducing it.

The controller 140 according to an embodiment operates the compressor 150 , the condenser 160 , the evaporator 180 , and the blower fan 13 based on the detection result of the internal temperature sensor 130 to operate the storage chamber 11 . can be cooled to the target temperature.

That is, the controller 140 compares the internal temperature of the storage chamber 11 with the target temperature based on the detection result of the internal temperature sensor 130, and when the internal temperature of the storage chamber 11 is higher than the target temperature, the compressor 150; By operating the condenser 160 and the evaporator 180, the cooling cycle can proceed.

The controller 140 according to an embodiment may determine whether overcondensation has occurred in the condenser 160 based on a temperature difference between the plurality of evaporators 180 .

That is, when the temperature difference between the plurality of evaporators 180 is equal to or greater than a preset value, the controller 140 may determine that overcondensation has occurred in the condenser 160 .

Specifically, the control unit 140, the temperature of the evaporator located at the rear end based on the flow of the refrigerant among the plurality of evaporators 180, the temperature of the evaporator located at the front stage based on the flow of the refrigerant among the plurality of evaporators 180 If the subtracted value is greater than or equal to a preset value, it may be determined that overcondensation has occurred in the condenser 160 .

For example, if the value obtained by subtracting the temperature of the first evaporator 180a from the temperature of the second evaporator 180b is greater than or equal to a preset value (eg, 15° C.), the controller 140 may overcondensate in the condenser 160 . can be determined to have occurred.

As described above, when overcondensation occurs in the condenser 160 , the supply of liquid refrigerant from the side of the plurality of evaporators 180 becomes insufficient, and accordingly, the cooling performance in the evaporator 180 is deteriorated. At this time, since the plurality of evaporators 180 are connected in series to each other, the cooling performance may be further deteriorated compared to the normal condition as they are located at the ends with respect to the flow of the refrigerant.

As such, when overcondensation occurs in the condenser 160, the temperature of the evaporator (eg, the evaporator on the freezing compartment side) located at the rear end based on the flow of the refrigerant among the plurality of evaporators 180 is lowered to the plurality of evaporators 180 . Based on the flow of the medium refrigerant, the temperature may be higher than the temperature of the evaporator (eg, the evaporator on the side of the refrigerating compartment) located at the front end.

In this case, a value obtained by subtracting the temperature of the evaporator located at the front end based on the flow of refrigerant among the plurality of evaporators 180 from the temperature of the evaporator located at the rear end based on the flow of refrigerant among the plurality of evaporators 180 is preset The value may be greater than or equal to the value, and the refrigerator 1 may determine whether overcondensation has occurred in the condenser 160 using this point.

At this time, according to an embodiment, the controller 140 may determine that overcondensation has occurred in the condenser 160 when the temperature difference between the plurality of evaporators 180 continues for a preset time equal to or greater than a preset value. .

The controller 140 according to an embodiment may control the driving time of the heat dissipation fan 170 based on whether or not overcondensation occurs in the condenser 160 .

Specifically, when it is determined that overcondensation has occurred in the condenser 160 , the controller 140 may adjust the off-time of the heat dissipation fan 170 to increase.

In this case, as the time during which the heat dissipation fan 170 is turned off becomes longer than in the normal condition, the period in which the heat dissipation fan 170 is turned on may become longer.

The heat dissipation fan 170 may be operated to cool the condenser 160 whose temperature is increased due to latent heat emitted by the refrigerant. However, if the temperature of the machine room 14 is lowered (outer air temperature is lowered) or the amount of heat exchange in the evaporator 180 is increased due to frequent opening and closing of the door 12 (refrigerant temperature rise), the refrigerant and the heat exchange target (eg, outdoor air) In a situation where the temperature difference therebetween is increased, if the heat dissipation fan 170 is continuously operated, the temperature difference between the refrigerant and the heat exchange target is further deepened, which may cause overcondensation in the condenser 160 .

Accordingly, the refrigerator 1 of the present invention can prevent the heat dissipation fan 170 from continuously operating by intermittently operating the heat dissipation fan 170 when overcondensation occurs in the condenser 160 . Through this, it is possible to reduce overcondensation in the condenser 160 .

The control unit 140 according to an exemplary embodiment may start determining whether overcondensation occurs in the condenser 160 based on at least one of a reference time, an outside air temperature, and an inside temperature.

Specifically, according to an embodiment, when a reference time has elapsed after determining whether overcondensation has occurred in the condenser 160 , the controller 140 may determine whether overcondensation has occurred again in the condenser 160 . That is, the controller 140 may determine whether overcondensation has occurred in the condenser 160 at preset time intervals. In other words, the controller 140 may periodically determine whether overcondensation has occurred in the condenser 160 , and for this purpose, periodically, determine the temperature difference between the plurality of evaporators 180 .

In addition, according to an embodiment, the controller 140 may prevent overcondensation in the condenser 160 when the outside air temperature of the refrigerator 1 is equal to or less than the reference outside air temperature (eg, 27° C.) based on the output of the outside air temperature sensor 120 . It can be determined whether this has occurred.

The condenser 160 may be installed in the machine room 14 or the outside air of the main body 10, specifically, the rear surface of the refrigerator 1, so that it is affected by the outside air temperature. At this time, when the outside air temperature is lowered, the temperature difference between the refrigerant and the heat dissipation target (eg, outside air) increases, so that the refrigerant may be more condensed in the condenser 160 than under normal conditions.

As such, the refrigerator 1 of the present invention may use the outside air temperature as a trigger for determining overcondensation, and the controller 140 periodically determines whether overcondensation occurs when the outside air temperature is below a preset temperature. Alternatively, the occurrence of overcondensation may be determined by further considering the internal temperature of the furnace, which will be described later.

In addition, according to an embodiment, the controller 140 may control the temperature in the condenser 160 based on the internal temperature of the storage chamber corresponding to the reference evaporator located at the end of the plurality of evaporators 180 based on the flow of the refrigerant. It may be determined whether to initiate the step of determining overcondensation.

Specifically, if the internal temperature of the refrigerator in the reference storage room is equal to or higher than a preset temperature, the controller 140 may determine whether overcondensation has occurred in the condenser 160 .

For example, when the plurality of storage compartments 11 are composed of a first storage compartment 11a corresponding to a refrigerating compartment and a second storage compartment 11b corresponding to a freezing compartment, the controller 140 may control the second storage compartment 11b. It may be determined as the reference storage chamber, and when the interior temperature of the second storage chamber 11b is equal to or greater than the reference storage temperature (eg, −10° C.), the step for determining the occurrence of overcondensation may be initiated.

That is, when overcondensation occurs in the condenser 160, the cooling performance in the second evaporator 180b positioned at the end of the first evaporator 180a and the second evaporator 180b based on the flow of the refrigerant is deepened. can be

In the refrigerator 1 of the present invention, in consideration of this point, the internal temperature of the refrigerator in the second storage chamber 11b corresponding to the second evaporator 180b located at the end of the refrigerant flow is equal to or higher than the preset temperature. In this case, it is expected that overcondensation has occurred in the condenser 160 , and a series of steps may be initiated to determine whether overcondensation has actually occurred in the condenser 160 .

In this case, according to an embodiment, when the compressor 150 continuously operates for a preset time (eg, 2 hours), the controller 140 may determine whether the internal temperature of the refrigerator in the reference storage room is equal to or higher than the reference temperature.

That is, in the refrigerator 1 of the present invention, when the compressor 150 continuously operates, it may be determined that the internal temperature of the refrigerator in the storage compartment 11 has not reached the target temperature, and the condenser 160 is overheated. In order to determine whether or not the occurrence of condensation is to be judged, the internal temperature in the reference storage room may be compared with the reference internal temperature.

The controller 140 may determine whether to initiate the step of determining the overcondensation in consideration of the internal temperature only when the outside temperature is equal to or less than a preset temperature, according to an embodiment.

The controller 140 may include a program for performing the above-described operation or an operation to be described later, at least one memory in which various data necessary for executing the program are stored, and at least one processor executing the stored program.

4 is a diagram illustrating an example of an output of the evaporator temperature sensor 110 according to an embodiment of the present invention.

The controller 140 according to an embodiment may determine whether overcondensation has occurred in the condenser 160 based on a temperature difference between the plurality of evaporators 180 .

That is, when the temperature difference between the plurality of evaporators 180 is equal to or greater than a preset value, the controller 140 may determine that overcondensation has occurred in the condenser 160 .

Specifically, the control unit 140, the temperature of the evaporator located at the rear end based on the flow of the refrigerant among the plurality of evaporators 180, the temperature of the evaporator located at the front stage based on the flow of the refrigerant among the plurality of evaporators 180 If the subtracted value is greater than or equal to a preset value, it may be determined that overcondensation has occurred in the condenser 160 .

For example, as shown in FIG. 4 , the controller 140 may set a value (ΔT) obtained by subtracting the temperature of the first evaporator 180a from the temperature of the second evaporator 180b to a preset value (eg, 15°C). ) or more, it may be determined that overcondensation has occurred in the condenser 160 .

As described above, when overcondensation occurs in the condenser 160 , the supply of liquid refrigerant from the side of the plurality of evaporators 180 becomes insufficient, and accordingly, the cooling performance in the evaporator 180 is deteriorated. At this time, since the plurality of evaporators 180 are connected in series with each other, the cooling performance may be further deteriorated compared to the normal condition as they are located at the ends with respect to the flow of the refrigerant.

As such, when overcondensation occurs in the condenser 160, the temperature of the evaporator (eg, the evaporator on the freezing compartment side) located at the rear end based on the flow of the refrigerant among the plurality of evaporators 180 is lowered to the plurality of evaporators 180 . Based on the flow of the medium refrigerant, the temperature may be higher than the temperature of the evaporator (eg, the evaporator on the side of the refrigerating compartment) located at the front end.

In this case, a value obtained by subtracting the temperature of the evaporator located at the front end based on the flow of refrigerant among the plurality of evaporators 180 from the temperature of the evaporator located at the rear end based on the flow of refrigerant among the plurality of evaporators 180 is preset The value may be greater than or equal to the value, and the refrigerator 1 may determine whether overcondensation has occurred in the condenser 160 using this point.

For example, the temperature of the first evaporator 180a corresponding to the first storage compartment 11a corresponding to the refrigerating compartment and the temperature of the second evaporator 180b corresponding to the second storage compartment 11b corresponding to the freezing compartment are, In 160, it may be maintained at -15°C and -30°C, respectively, under normal conditions where overcondensation does not occur, and the temperature difference (ΔT) between the first evaporator 180a and the second evaporator 180b is constant can be maintained

At this time, the temperature of the second evaporator 180b may increase compared to a normal condition due to a decrease in cooling performance when overcondensation occurs in the condenser 160, and in the series arrangement of the plurality of evaporators 180 As it is located at the end, the liquid refrigerant shortage is the most severe, and may be higher than the temperature of the first evaporator 180a.

Accordingly, when overcondensation occurs in the condenser 160 , a value obtained by subtracting the temperature of the first evaporator 180a from the temperature of the second evaporator 180b may be a positive number, and the controller 140 may When a value obtained by subtracting the temperature of the first evaporator 180a from the temperature of the evaporator 180b becomes a preset temperature (eg, 15° C.) or more, it may be determined that overcondensation has occurred in the condenser 160 .

At this time, according to an embodiment, the controller 140 may determine that overcondensation has occurred in the condenser 160 when the temperature difference between the plurality of evaporators 180 continues for a preset time equal to or greater than a preset value. .

5 is a view showing the operation of the heat dissipation fan 170 according to an embodiment of the present invention.

Referring to FIG. 5 , the controller 140 according to an embodiment may control the driving time of the heat dissipation fan 170 based on whether or not overcondensation occurs in the condenser 160 .

Specifically, when it is determined that overcondensation has occurred in the condenser 160 , the controller 140 may adjust the off-time of the heat dissipation fan 170 to increase.

In this case, the period in which the heat dissipation fan 170 is turned on may become longer as the time during which the heat dissipation fan 170 is turned off becomes longer than in the normal condition.

That is, the heat dissipation fan 170, when the condenser 160 is in the over-condensing condition, compared to the normal operation when the condenser 160 is in the normal condition, the off time may increase, and as a result, the on The cycle may be long.

The heat dissipation fan 170 may be operated to cool the condenser 160 whose temperature is increased due to latent heat emitted by the refrigerant. However, if the temperature of the machine room 14 is lowered (outer air temperature is lowered) or the amount of heat exchange in the evaporator 180 is increased due to frequent opening and closing of the door 12 (refrigerant temperature rise), the refrigerant and the heat exchange target (eg, outdoor air) In a situation where the temperature difference therebetween is increased, if the heat dissipation fan 170 is continuously operated, the temperature difference between the refrigerant and the heat exchange target is further deepened, which may cause overcondensation in the condenser 160 .

Accordingly, the refrigerator 1 of the present invention can prevent the heat dissipation fan 170 from continuously operating by intermittently operating the heat dissipation fan 170 when overcondensation occurs in the condenser 160 . Through this, it is possible to reduce overcondensation in the condenser 160 .

6 is a view for explaining a case in which the refrigerator 1 according to an embodiment of the present invention determines whether overcondensation occurs.

Referring to FIG. 6 , the controller 140 according to an exemplary embodiment may start determining whether overcondensation occurs in the condenser 160 based on at least one of a reference time, an outdoor temperature, and an internal temperature.

Specifically, according to an embodiment, when a reference time has elapsed after determining whether overcondensation has occurred in the condenser 160 , the controller 140 may determine whether overcondensation has occurred again in the condenser 160 . That is, the controller 140 may determine whether overcondensation has occurred in the condenser 160 at preset time intervals. In other words, the controller 140 may periodically determine whether overcondensation has occurred in the condenser 160 , and for this purpose, periodically, determine the temperature difference between the plurality of evaporators 180 .

In addition, according to an embodiment, the controller 140 may prevent overcondensation in the condenser 160 when the outside air temperature of the refrigerator 1 is equal to or less than the reference outside air temperature (eg, 27° C.) based on the output of the outside air temperature sensor 120 . It can be determined whether this has occurred.

The condenser 160 may be installed in the machine room 14 or the outside air of the main body 10, specifically, the rear surface of the refrigerator 1, so that it is affected by the outside air temperature. At this time, when the outside air temperature is lowered, the temperature difference between the refrigerant and the heat dissipation target (eg, outside air) increases, so that the refrigerant may be more condensed in the condenser 160 than under normal conditions.

As such, the refrigerator 1 of the present invention may use the outside air temperature as a trigger for determining overcondensation, and the controller 140 periodically determines whether overcondensation occurs when the outside air temperature is below a preset temperature. Alternatively, the occurrence of overcondensation may be determined by further considering the internal temperature of the furnace.

In addition, according to an embodiment, the controller 140 may control the temperature in the condenser 160 based on the internal temperature of the storage chamber corresponding to the reference evaporator located at the end of the plurality of evaporators 180 based on the flow of the refrigerant. It may be determined whether to initiate the step of determining overcondensation.

Specifically, if the internal temperature of the refrigerator in the reference storage room is equal to or higher than a preset temperature, the controller 140 may determine whether overcondensation has occurred in the condenser 160 .

For example, when the plurality of storage compartments 11 are composed of a first storage compartment 11a corresponding to a refrigerating compartment and a second storage compartment 11b corresponding to a freezing compartment, the controller 140 may control the second storage compartment 11b. It may be determined as the reference storage chamber, and when the interior temperature of the second storage chamber 11b is equal to or greater than the reference storage temperature (eg, −10° C.), the step for determining the occurrence of overcondensation may be initiated.

That is, when overcondensation occurs in the condenser 160, the cooling performance in the second evaporator 180b positioned at the end of the first evaporator 180a and the second evaporator 180b based on the flow of the refrigerant is deepened. can be

In the refrigerator 1 of the present invention, in consideration of this point, the internal temperature of the refrigerator in the second storage chamber 11b corresponding to the second evaporator 180b located at the end of the refrigerant flow is equal to or higher than the preset temperature. In this case, it is expected that overcondensation has occurred in the condenser 160 , and a series of steps may be initiated to determine whether overcondensation has actually occurred in the condenser 160 .

In this case, according to an embodiment, when the compressor 150 continuously operates for a preset time (eg, 2 hours), the controller 140 may determine whether the internal temperature of the refrigerator in the reference storage room is equal to or higher than the reference temperature.

That is, in the refrigerator 1 of the present invention, when the compressor 150 continuously operates, it may be determined that the internal temperature of the refrigerator in the storage compartment 11 has not reached the target temperature, and the condenser 160 is overheated. In order to determine whether or not the occurrence of condensation is to be judged, the internal temperature in the reference storage room may be compared with the reference internal temperature.

The controller 140 may determine whether to initiate the step of determining the overcondensation in consideration of the internal temperature only when the outside temperature is equal to or less than a preset temperature, according to an embodiment. That is, the controller 140 may start to determine whether overcondensation occurs in the condenser 160 under both the outside temperature and the inside temperature. In other words, when the outside temperature is less than or equal to the reference outside temperature (eg, 27° C.) and the internal temperature of the reference storage room is equal to or greater than the reference internal temperature (eg, -10° C.), the controller 140 may overcondensate in the condenser 160 . Determination of whether or not it occurs can be initiated.

Hereinafter, an embodiment of a method for controlling the refrigerator 1 according to an aspect will be described. The refrigerator 1 according to the above-described embodiment may be used for the control method of the refrigerator 1 . Accordingly, the contents described above with reference to FIGS. 1 to 6 may be equally applied to the control method of the refrigerator 1 .

7 is a flowchart illustrating a case of reducing overcondensation in the condenser in the control method of the refrigerator 1 according to an embodiment of the present invention.

Referring to FIG. 7 , in the refrigerator 1 according to an exemplary embodiment, when the temperature difference between the plurality of evaporators 180 is greater than or equal to a preset value (Yes of 710 ), the direction in which the off time of the heat dissipation fan 170 is increased can be adjusted to (720).

That is, when the temperature difference between the plurality of evaporators 180 is equal to or greater than a preset value, the controller 140 may determine that overcondensation has occurred in the condenser 160 .

Specifically, the control unit 140, the temperature of the evaporator located at the rear end based on the flow of the refrigerant among the plurality of evaporators 180, the temperature of the evaporator located at the front stage based on the flow of the refrigerant among the plurality of evaporators 180 If the subtracted value is greater than or equal to a preset value, it may be determined that overcondensation has occurred in the condenser 160 .

For example, if the value obtained by subtracting the temperature of the first evaporator 180a from the temperature of the second evaporator 180b is greater than or equal to a preset value (eg, 15° C.), the controller 140 may overcondensate in the condenser 160 . can be determined to have occurred.

As described above, when overcondensation occurs in the condenser 160 , the supply of liquid refrigerant from the side of the plurality of evaporators 180 becomes insufficient, and accordingly, the cooling performance in the evaporator 180 is deteriorated. At this time, since the plurality of evaporators 180 are connected in series with each other, the cooling performance may be further deteriorated compared to the normal condition as they are located at the ends with respect to the flow of the refrigerant.

As such, when overcondensation occurs in the condenser 160, the temperature of the evaporator (eg, the evaporator on the freezing compartment side) located at the rear end based on the flow of the refrigerant among the plurality of evaporators 180 is lowered to the plurality of evaporators 180 . Based on the flow of the medium refrigerant, the temperature may be higher than the temperature of the evaporator (eg, the evaporator on the side of the refrigerating compartment) located at the front end.

In this case, a value obtained by subtracting the temperature of the evaporator located at the front end based on the flow of refrigerant among the plurality of evaporators 180 from the temperature of the evaporator located at the rear end based on the flow of refrigerant among the plurality of evaporators 180 is preset The value may be greater than or equal to the value, and the refrigerator 1 may determine whether overcondensation has occurred in the condenser 160 using this point.

When it is determined that overcondensation has occurred in the condenser 160 , the controller 140 may adjust the off-time of the heat dissipation fan 170 in an increasing direction.

In this case, the period in which the heat dissipation fan 170 is turned on may become longer as the time during which the heat dissipation fan 170 is turned off becomes longer than in the normal condition.

The heat dissipation fan 170 may be operated to cool the condenser 160 whose temperature is increased due to latent heat emitted by the refrigerant. However, if the temperature of the machine room 14 is lowered (outer air temperature is lowered) or the amount of heat exchange in the evaporator 180 is increased due to frequent opening and closing of the door 12 (refrigerant temperature rise), the refrigerant and the heat exchange target (eg, outdoor air) In a situation where the temperature difference therebetween is increased, if the heat dissipation fan 170 is continuously operated, the temperature difference between the refrigerant and the heat exchange target is further deepened, which may cause overcondensation in the condenser 160 .

Accordingly, the refrigerator 1 of the present invention can prevent the heat dissipation fan 170 from continuously operating by intermittently operating the heat dissipation fan 170 when overcondensation occurs in the condenser 160 . Through this, it is possible to reduce overcondensation in the condenser 160 .

8 is a flowchart of determining whether or not overcondensation occurs in the condenser 160 in the control method of the refrigerator 1 according to an embodiment of the present invention.

Referring to FIG. 8 , in the refrigerator 1 according to an embodiment, when the outside air temperature is less than or equal to the reference outside temperature (Yes of 810), the compressor 150 continuously operates for a preset time (Yes of 820), and the reference When the internal temperature of the storage chamber is equal to or higher than the reference internal temperature (example of 830), it is possible to determine the temperature difference between the plurality of evaporators 180 (840), and based on the determined temperature difference, it is possible to determine whether or not overcondensation in the condenser 160 is performed. There is (850).

That is, the refrigerator 1 may start to determine whether overcondensation occurs in the condenser 160 in consideration of both the outside temperature and the inside temperature.

The condenser 160 may be installed in the machine room 14 or the outside air of the main body 10, specifically, the rear surface of the refrigerator 1, so that it is affected by the outside air temperature. At this time, when the outside air temperature is lowered, the temperature difference between the refrigerant and the heat dissipation target (eg, outside air) increases, so that the refrigerant may be more condensed in the condenser 160 than under normal conditions.

In addition, the internal temperature of the refrigerator in the reference storage chamber corresponding to the reference evaporator located at the end of the plurality of evaporators based on the flow of the refrigerant among the plurality of evaporators 180 is the cooling performance due to the lack of liquid refrigerant when overcondensation occurs in the condenser 160 . It can rise with a decline.

In consideration of this point, the refrigerator 1 may start to determine whether overcondensation occurs in the condenser 160 in consideration of the outside temperature and the inside temperature.

In this case, when the compressor 150 continuously operates for a preset period of time (eg, 2 hours), the refrigerator 1 may determine whether the internal temperature of the refrigerator in the reference storage room is equal to or greater than the reference temperature.

That is, when the compressor 150 continues to operate, the refrigerator 1 may determine that the internal temperature of the storage chamber 11 has not reached the target temperature, and prevents the occurrence of overcondensation in the condenser 160 . In order to determine whether it is a degree to be judged, the internal temperature of the refrigerator in the reference storage room may be compared with the internal temperature of the reference storage chamber.

However, the refrigerator 1 may start to periodically determine whether overcondensation has occurred in the condenser 160 irrespective of the outside air temperature and the inside temperature, depending on the embodiment, and only one of the outside temperature or the inside temperature is considered. Thus, the determination of whether or not overcondensation occurs in the condenser 160 may be started.

Meanwhile, the disclosed embodiments may be implemented in the form of a recording medium storing instructions executable by a computer. Instructions may be stored in the form of program code, and when executed by a processor, may generate program modules to perform the operations of the disclosed embodiments. The recording medium may be implemented as a computer-readable recording medium.

The computer-readable recording medium includes any type of recording medium in which instructions readable by the computer are stored. For example, there may be read only memory (ROM), random access memory (RAM), magnetic tape, magnetic disk, flash memory, optical data storage, and the like.

The disclosed embodiments have been described with reference to the accompanying drawings as described above. Those of ordinary skill in the art to which the present invention pertains will understand that the present invention may be practiced in other forms than the disclosed embodiments without changing the technical spirit or essential features of the present invention. The disclosed embodiments are illustrative and should not be construed as limiting.

1: refrigerator 10: body
11: storage room 12: door
13: blow fan 100: cooling device
110: evaporator temperature sensor 120: outside temperature sensor
130: inside temperature sensor 140: control unit
150: compressor 160: condenser
170: heat dissipation fan 180: evaporator
190: expansion valve

Claims (20)

a plurality of storage rooms;
a plurality of evaporators arranged in series with each other and corresponding to each of the plurality of storage chambers;
a compressor for compressing the refrigerant evaporated through the plurality of evaporators;
a condenser condensing the compressed refrigerant;
a heat dissipation fan for cooling the condenser;
a plurality of evaporator temperature sensors for sensing the temperature of each of the plurality of evaporators; and
A refrigerator comprising a; a controller that determines whether overcondensation has occurred in the condenser based on a temperature difference between the plurality of evaporators, and controls a driving time of the heat dissipation fan based on whether overcondensation occurs. According to claim 1,
The control unit is
When it is determined that overcondensation has occurred in the condenser, the refrigerator adjusts the off-time of the heat dissipation fan in an increasing direction. According to claim 1,
The control unit is
The refrigerator determines that overcondensation has occurred in the condenser when the temperature difference between the plurality of evaporators is greater than or equal to a preset value. 4. The method of claim 3,
The plurality of storage rooms,
cold room; and
Including a freezer;
the evaporator,
a first evaporator receiving the refrigerant from the condenser and corresponding to the refrigerating chamber; and
and a second evaporator that receives the refrigerant from the first evaporator and corresponds to the freezing chamber.
The control unit is
A refrigerator for determining whether overcondensation has occurred in the condenser based on a temperature difference between the first evaporator and the second evaporator. 4. The method of claim 3,
The control unit is
The refrigerator determines that overcondensation has occurred in the condenser when the temperature difference between the plurality of evaporators is maintained for a reference time equal to or greater than a preset reference value. According to claim 1,
The control unit is
A refrigerator for determining whether overcondensation has occurred in the condenser at preset time intervals. According to claim 1,
The refrigerator is
An outdoor temperature sensor for measuring the outdoor temperature; further comprising,
The control unit is
A refrigerator for determining whether overcondensation has occurred in the condenser when the outside air temperature is less than or equal to a reference temperature. According to claim 1,
The refrigerator is
Further comprising; a plurality of internal temperature sensors for measuring the internal temperature of each of the plurality of storage rooms;
The control unit is
A refrigerator for determining whether to start the step of determining the overcondensation in the condenser based on the internal temperature of the refrigerator corresponding to the reference evaporator located at the end of the plurality of evaporators based on the flow of the refrigerant. 9. The method of claim 8,
The control unit is
A refrigerator for determining whether overcondensation has occurred in the condenser when the internal temperature of the refrigerator in the reference storage room is equal to or greater than the reference temperature. 10. The method of claim 9,
The control unit is
A refrigerator for determining whether a refrigerator temperature in the reference storage compartment is equal to or greater than a reference temperature when the compressor is continuously operated for a preset time. A plurality of storage chambers, a plurality of evaporators arranged in series with each other, corresponding to each of the plurality of storage chambers, a compressor for compressing the refrigerant evaporated through the plurality of evaporators, a condenser for condensing the compressed refrigerant, and heat dissipation for cooling the condenser A control method of a refrigerator comprising a fan and a plurality of evaporator temperature sensors for sensing the temperature of each of the plurality of evaporators,
determine whether overcondensation has occurred in the condenser based on a temperature difference between the plurality of evaporators;
Control method of a refrigerator comprising a; controlling the driving time of the heat dissipation fan based on whether or not overcondensation occurs. 12. The method of claim 11,
Controlling the driving time of the heat dissipation fan,
and adjusting an off time of the heat dissipation fan to increase when it is determined that overcondensation has occurred in the condenser. 12. The method of claim 11,
Determining whether overcondensation has occurred in the condenser comprises:
and determining that overcondensation has occurred in the condenser when the temperature difference between the plurality of evaporators is greater than or equal to a preset value. 14. The method of claim 13,
The plurality of storage rooms,
cold room; and
Including a freezer;
the evaporator,
a first evaporator receiving the refrigerant from the condenser and corresponding to the refrigerating chamber; and
and a second evaporator that receives the refrigerant from the first evaporator and corresponds to the freezing chamber.
Determining whether overcondensation has occurred in the condenser comprises:
and determining whether overcondensation has occurred in the condenser based on a temperature difference between the first evaporator and the second evaporator. 14. The method of claim 13,
Determining whether overcondensation has occurred in the condenser comprises:
and determining that overcondensation has occurred in the condenser when the temperature difference between the plurality of evaporators is maintained for a reference time equal to or greater than a preset reference value. 12. The method of claim 11,
Determining whether overcondensation has occurred in the condenser comprises:
A control method of a refrigerator comprising a; determining whether overcondensation has occurred in the condenser at a preset time interval. 12. The method of claim 11,
The refrigerator is
An outdoor temperature sensor for measuring the outdoor temperature; further comprising,
Determining whether overcondensation has occurred in the condenser comprises:
and determining whether overcondensation has occurred in the condenser when the outside air temperature is less than or equal to a reference temperature. 12. The method of claim 11,
The refrigerator is
Further comprising; a plurality of internal temperature sensors for measuring the internal temperature of each of the plurality of storage rooms;
Determining whether overcondensation has occurred in the condenser comprises:
Determining whether to start the step of determining the overcondensation in the condenser based on the internal temperature of the refrigerator corresponding to the reference evaporator located at the end of the plurality of evaporators based on the flow of refrigerant among the plurality of evaporators; control method. 19. The method of claim 18,
Determining whether overcondensation has occurred in the condenser comprises:
and determining whether overcondensation has occurred in the condenser when the internal temperature of the refrigerator in the reference storage room is equal to or greater than the reference temperature. 20. The method of claim 19,
and determining whether the internal temperature of the refrigerator in the reference storage compartment is equal to or higher than a reference temperature when the compressor continuously operates for a preset time.

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