KR20150109863A - A refrigerator and a control method the same - Google Patents

Abstract

The present invention relates to a refrigerator and a control method thereof. According to an embodiment, a refrigerator comprises: a compressor compressing refrigerant; a condenser condensing the refrigerant compressed in the compressor; a dryer wherein the refrigerant condensed in the condenser flows into, which removes impurities or water in the refrigerant; a flow control unit arranged in an exit of the dryer to convert or control the flow of the refrigerant; a plurality of evaporators connected to the flow control unit; and a guide pipe extended in one side of at least one of the evaporators from the dryer to guide cooling of the refrigerator.

Description

A refrigerator and a control method thereof

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

Generally, a refrigerator is provided with a plurality of storage chambers for storing foodstuffs to be frozen or refrigerated, and one side of the storage chamber is opened to receive and take out the foodstuffs. The plurality of storage rooms include a freezer room for refrigerated storage of food and a refrigerated room for refrigerated storage of food.

In the refrigerator, the refrigeration system in which the refrigerant circulates is driven. The apparatus constituting the refrigeration system includes a compressor, a condenser, an expansion device, and an evaporator. The evaporator may include a first evaporator provided at one side of the refrigerating compartment and a second evaporator provided at one side of the freezing compartment.

The cold air stored in the refrigerating chamber is cooled while passing through the first evaporator, and the cooled cold air can be supplied to the refrigerating chamber again. The cold air stored in the freezing chamber is cooled while passing through the second evaporator, and the cooled cold air can be supplied to the freezing chamber again.

Thus, the conventional refrigerator is configured such that independent cooling is performed through a plurality of storage rooms through separate evaporators.

In this connection, the present applicant has been granted a patent (Prior Patent Registration No. 10-1275184, registered on June 10, 2013).

According to the conventional refrigerator, the refrigerant flowing into the first and second evaporators is decompressed by the expansion device to be formed in a two-phase state, for example, a two-phase state in which the degree of dryness is somewhat high and the heat exchange efficiency in the first and second evaporators is lowered There was a problem.

The refrigerant may be selectively supplied to the first evaporator or the second evaporator depending on a cooling operation mode, that is, depending on whether the refrigerator compartment or the freezer compartment is cooled. At this time, the amount of the refrigerant circulating in the refrigeration cycle may become insufficient depending on the operation mode condition.

On the other hand, in recent years, it has become a trend to store a large amount of food in the storage room by increasing the capacity of the storage room of the refrigerator. It is necessary to make the condenser large in order to effectively cool the large storage room. However, in a situation where the total size of the refrigerator is limited within the setting range, the condenser is also limited to be formed larger than the set size.

As a result, in the case of a refrigerator in which a condenser of a limited size is provided, a sufficient amount of condensed heat can not be ensured, thereby lowering the operation efficiency.

In order to solve such a problem, the present embodiment aims to provide a refrigerator with improved operation efficiency.

The refrigerator according to the present embodiment includes a compressor for compressing refrigerant; A condenser for condensing the refrigerant compressed in the compressor; A condenser for condensing the condensed refrigerant, a dryer for removing impurities or moisture from the refrigerant; A flow regulator disposed at an outlet side of the dryer for switching or regulating the flow of the refrigerant; A plurality of evaporators connected to the flow regulating unit; And a guide pipe extending from the dryer to one side of the evaporator of at least one of the plurality of evaporators to guide cooling of the refrigerant.

The at least one evaporator may further include a refrigerant tube through which the refrigerant flows; And a fixing bracket for fixing the refrigerant tube and the guide pipe.

The guide pipe may include a pipe outlet connected to one side of the dryer to guide the refrigerant to the at least one evaporator; And a pipe inlet connected to the other side of the dryer for introducing the refrigerant cooled from the at least one evaporator into the dryer.

The apparatus further includes a check valve installed in the pipeline inlet to limit the flow of refrigerant from the pipeline inlet to the at least one evaporator.

Further, the dryer includes a dryer body forming an internal space; At least one filter member disposed in an inner space of the dryer body; And a support portion for supporting the lower side of the filter member.

In addition, a first space portion for guiding the liquid refrigerant introduced into the dryer downward is formed between the inner circumferential surface of the dryer body and the outer circumferential surface of the support portion.

The dryer further includes a floating member spaced below the support portion and provided so as to be movable up and down.

Further, the dryer includes an inlet formed at an upper portion of the dryer body to guide the inflow of the refrigerant; And a discharge port formed at a lower portion of the dryer body for guiding the discharge of the refrigerant and selectively opened and closed by the floating member.

Further, there is provided a storage device comprising: a body forming a storage chamber; A door that opens and closes the main body; And a hot line pipe for guiding the refrigerant passing through the condenser to the front portion of the main body.

Further, a bypass valve is provided at the inlet side of the hot-line pipe for controlling the amount of refrigerant flowing into the hot-line pipe or the inflow time of the refrigerant.

Further, a bypass pipe extending from the bypass valve to the dryer and guiding the refrigerant to bypass the hotline pipe is further included.

According to another aspect of the present invention, there is provided a control method for a refrigerator including a compressor for compressing refrigerant, a condenser for condensing the refrigerant compressed by the compressor, and a hot line pipe for guiding the refrigerant passing through the condenser to the front portion of the refrigerator body, The method comprising the steps of: sensing a humidity outside the refrigerator; And a step of recognizing whether the sensed humidity is equal to or higher than the set value and adjusting the amount of refrigerant flowing into the hotline pipe or the flow time of the refrigerant.

In addition, when the sensed humidity is equal to or higher than the set value, the bypass valve connected to the hotline pipe is adjusted to increase the refrigerant flow time to the hotline pipe.

In addition, when the sensed humidity is less than the set value, the bypass valve connected to the hotline pipe is adjusted to reduce the time for the refrigerant to flow into the hotline pipe.

According to the proposed embodiment, the dryer is provided at the outlet side of the condenser, and the gaseous refrigerant in the two-phase refrigerant introduced into the dryer is heat-exchanged with the evaporator to condense the refrigerant, thereby improving the condensing efficiency and lowering the dryness of the refrigerant flowing into the evaporator .

The efficiency of heat exchange in the evaporator can be improved by lowering the dryness of the refrigerant flowing into the evaporator, thereby improving the power consumption.

In addition, since the piping outlet portion is coupled to the upper portion of the dryer, the gaseous refrigerant in the two-phase refrigerant introduced into the dryer can be easily flowed toward the evaporator.

Further, the inside of the dryer includes a floating member floating by the liquid refrigerant, and the floating member is configured to open the outlet portion of the dryer when the liquid refrigerant flows in a predetermined amount or more, thereby enabling reliable operation of the dryer have.

In addition, since the bypass valve is provided at the inlet side of the hot line for preventing the dew formation of the refrigerator, the amount of the refrigerant flowing into the hot line can be controlled according to the humidity outside the refrigerator, The heat load transferred to the inside of the refrigerator can be reduced.

1 is a perspective view illustrating a configuration of a refrigerator according to a first embodiment of the present invention.
2 is a view showing a part of a refrigerator according to a first embodiment of the present invention.
FIG. 3 is a rear view of a refrigerator according to a first embodiment of the present invention. FIG.
4 is a view showing the construction of a dryer according to a first embodiment of the present invention.
5 is a view showing the operation of the dryer according to the first embodiment of the present invention.
FIG. 6 is a diagram illustrating a refrigerant cycle configuration of a refrigerator according to a first embodiment of the present invention.
7 is a view illustrating a refrigerant cycle configuration of a refrigerator according to a second embodiment of the present invention.
8 is a block diagram showing a configuration of a refrigerator according to a second embodiment of the present invention.
FIG. 9 is a flow chart showing a control method of a refrigerator according to a second embodiment of the present invention.

Hereinafter, specific embodiments of the present invention will be described with reference to the drawings. It is to be understood, however, that the spirit of the invention is not limited to the embodiments shown and that those skilled in the art, upon reading and understanding the spirit of the invention, may easily suggest other embodiments within the scope of the same concept.

FIG. 1 is a perspective view showing a configuration of a refrigerator according to a first embodiment of the present invention, FIG. 2 is a view showing a part of a refrigerator according to a first embodiment of the present invention, FIG. Fig. 8 is a rear view of a refrigerator according to an example.

1 to 3, a refrigerator 10 according to an embodiment of the present invention includes a main body 11 forming a storage chamber. The storage chamber includes a refrigerating chamber 20 and a freezing chamber 30. For example, the refrigerating chamber 20 may be disposed above the freezing chamber 30. [ However, the position of the freezing chamber 20 and the freezing chamber 30 is not limited thereto.

The refrigerating chamber (20) and the freezing chamber (30) may be partitioned by a partition wall (28).

The refrigerator 10 includes a refrigerating chamber door 25 for opening and closing the refrigerating chamber 20 and a freezing chamber door 35 for opening and closing the freezing chamber 30. The refrigerator compartment door 25 is hinged to the main body 10 and is rotatable. The freezer compartment door 35 can be pulled out in a drawer type.

The main body 11 is provided with an outer case 12 forming an outer appearance of the refrigerator 10 and at least a part of the inner surface of the refrigerating chamber 20 or the freezing chamber 30 disposed inside the outer case 12 And an inner case 13 for forming the inner case.

A cold room discharging unit 22 for discharging cold air into the refrigerating chamber 20 is provided on a rear wall of the refrigerating chamber 20. [ Although not shown in the drawings, a freezer compartment cooler discharge unit for discharging cool air into the freezer compartment 30 may be formed on a rear wall of the freezer compartment 30. [

The refrigerator 10 includes a plurality of evaporators 150 and 160 for independently cooling the refrigerating compartment 20 and the freezing compartment 30, respectively. The plurality of evaporators 150 and 160 include a first evaporator 150 for cooling one of the refrigerating compartment 20 and the freezing compartment 30 and a second evaporator 160 for cooling the other compartment .

For example, the first evaporator 150 may be a refrigerator compartment evaporator for cooling the refrigerating compartment 20, and the second evaporator 160 may be a freezer compartment evaporator for cooling the freezing compartment 30. In this embodiment, since the refrigerating chamber 20 is disposed above the freezing chamber 30, the first evaporator 150 may be disposed above the second evaporator 160.

The first evaporator 150 may be disposed at the rear side of the rear wall of the refrigerating chamber 20 and the second evaporator 160 may be disposed at a rear side of the rear wall of the freezing chamber 30. The cold air generated by the first evaporator 150 is supplied to the refrigerating chamber 20 through the refrigerating chamber discharging unit 22 and the cold air generated by the second evaporator 160 is discharged through the freezing chamber discharging unit And can be supplied to the freezing chamber 30.

The second evaporator 160 includes a refrigerant tube 161 through which the refrigerant flows and a pin 162 connected to the refrigerant tube 161 to increase a heat exchange area between the refrigerant and the fluid, And a fixing bracket 163 for fixing. A plurality of fixing brackets 163 may be provided on both sides of the refrigerant tube 161.

The refrigerant tube 161 is configured to be bent in one direction and the other direction and the fixing bracket 163 fixes both sides of the refrigerant tube 161 to prevent the refrigerant tube 161 from shaking. For example, the refrigerant tube 161 may be arranged to pass through the fixing bracket 163.

A plurality of the fins 162 are spaced apart from each other, and the refrigerant tube 161 is disposed to pass through the plurality of fins 162.

A gas-liquid separator 170 is provided at one side of the second evaporator 160 to filter the liquid refrigerant in the refrigerant vaporized in the second evaporator 160 and supply the gaseous refrigerant to the second compressor 115.

The structure of the first evaporator 150 is similar to that of the second evaporator 160. The first evaporator 150 includes the refrigerant tube, the fin, and the fixing bracket described above. Further, another gas-liquid separator may be provided on one side of the first evaporator 150.

The refrigerator 10 includes a machine room 50 in which a main component of a refrigerator is installed at a rear lower portion of the refrigerator 10, that is, at a rear lower portion of the freezer chamber 30. For example, in the machine room 50, a compressor and a condenser are installed.

3, a plurality of compressors 111 and 115 for compressing the refrigerant and a condenser 120 (see FIG. 6) for condensing the refrigerant compressed by the compressors 111 and 115 are installed in the machine room 50 .

The machine room 50 is provided with a flow control unit 130 for controlling the flow direction of the refrigerant to supply the refrigerant to at least one of the first evaporator 150 and the second evaporator 160 Respectively.

The machine room (50) is provided with a dryer (180) for removing moisture or impurities contained in the refrigerant condensed in the condenser (120). The dryer 180 may temporarily store the liquid refrigerant introduced into the dryer 180.

The refrigerator 10 further includes a guide pipe 190 extending from the dryer 180 to the second evaporator 160 to guide the flow of the refrigerant. The guide pipe 190 may extend from the dryer 180 to the outside of the machine room 50 and may be fixed to one side of the second evaporator 160.

In detail, the guide pipe 190 may be coupled to the fixing bracket 163. For example, both sides of the guide pipe 190 may be fixed by the fixing bracket 163.

The guide pipe 190 may be positioned adjacent to the second evaporator 160. Since the low-temperature refrigerant flows into the refrigerant tube 161, the periphery of the second evaporator 160 forms a low temperature. Accordingly, the refrigerant flowing through the guide pipe 190 can be cooled (condensed) in the process of flowing adjacent to the second evaporator 160.

In particular, when the refrigerant flowing through the guide pipe 190 is a gaseous refrigerant, the gaseous refrigerant can be phase-changed into liquid refrigerant while flowing around the second evaporator 160.

Hereinafter, the structure of the dryer 180 will be described in detail.

FIG. 4 is a view showing the construction of a dryer according to a first embodiment of the present invention, and FIG. 5 is a view showing the operation of the dryer according to the first embodiment of the present invention.

4, the dryer 180 according to the first embodiment of the present invention includes a dryer main body 181 forming an internal space, a condenser 181 formed at an upper portion of the dryer main body 181, An inlet 181a through which the two-phase refrigerant flows, and a discharge port 181b formed through the lower portion of the dryer body 181 and through which the liquid refrigerant is discharged.

The inlet 181a is formed at an upper portion of the dryer main body 181 and the outlet 181b is formed at a lower portion of the dryer main body 181. The dryer main body 181 may have a substantially cylindrical shape.

In the interior of the dryer body 181, one or more filter members 182 are provided to remove impurities or moisture from the refrigerant introduced through the inlet 181a. In one example, a plurality of the filter members 182 may be provided. The plurality of filter members 182 fill at least a part of the internal space of the dryer body 181. The filter member 182 may have a substantially spherical shape.

Impurities or moisture in the refrigerant can be separated through the plurality of filter members 182. The filter member 182 may be made of a material that can easily adsorb the impurities or moisture.

In the interior of the dryer body 181, a support portion 183 for supporting the plurality of filter members 182 is provided. The plurality of filter members 182 may be disposed from the support 183 to a position adjacent to the inlet 181a.

The support portion 183 may be positioned to be spaced from the inner circumferential surface of the dryer main body 181. That is, the side portion of the support portion 183 and the inner peripheral surface of the dryer main body 181 may be spaced apart from each other.

The first space portion 183a defined between the outer circumferential surface of the support portion 183 and the inner circumferential surface of the drier main body 181 is included in the inner space of the dryer main body 181. [ The first space portion 183a forms a flow space through which the liquid refrigerant passing through the plurality of filter members 182 flows.

Below the support portion 183, a second space portion 181c for storing liquid refrigerant is formed. The second space 181c includes a floating member 185 spaced below the support 183 and provided to be movable up and down and a side surface of the floating member 185, And a third space portion 185a formed between the inner circumferential surfaces of the first space portion 185a and the second space portion 185b.

The floating member 185 has a substantially conical shape whose diameter becomes smaller toward the lower side, and the inside thereof forms a flow space through which the liquid refrigerant can flow.

The lower portion of the floating member 185 is configured to selectively open and close the outlet 181b. The lower part of the floating member 185 is configured to close the discharge opening 181b while the lower part of the floating member 185 is moved upward, The discharge port 181b can be opened.

The third space 185a is defined as a space defined between the floating member 185 and the drier main body 181. When the liquid coolant is charged into the third space 185a, 185 can be moved upward by the buoyant force of the liquid refrigerant.

One side of the guide pipe 190 is connected to an upper portion of the dryer main body 181 and the other side of the guide pipe 190 is connected to a lower portion of the dryer main body 181.

Here, the "upper part " is a part located on the upper side of the support part 183 and the" lower part " is understood as a part located on the lower side of the support part 183.

The guide pipe 190 is connected to an upper portion of the dryer main body 181 and includes a pipe outlet 191 for guiding the gaseous refrigerant present in the dryer main body 181 to the outside of the dryer main body 181, And a pipe inlet 192 connected to the lower portion of the dryer main body 181 and guiding the refrigerant heat exchanged with the second evaporator 160, that is, the liquid refrigerant, into the inside of the dryer main body 181.

The end of the piping outlet portion 191 is positioned so as to face downward in the interior of the dryer main body 181.

The end of the pipe inlet 192 is connected to the floating member 185 to guide the refrigerant into the floating member 185. The refrigerant flowing into the inside of the dryer body 181 through the pipe inlet 192 may flow toward the discharge port 181b through the floating member 185. [

The operation of the dryer 180 will be described with reference to FIG.

After being condensed in the condenser 120, the two-phase refrigerant flows into the interior of the dryer main body 181 through the inlet portion 181a of the dryer 180. The impurities or water contained in the refrigerant are filtered while passing through the plurality of filter members 182 and the liquid refrigerant flows through the first space portion 183a to the lower side of the support portion 183, (181a).

As the amount of the liquid refrigerant flowing into the second space portion 181a increases, the liquid refrigerant in the third space portion 185a becomes colder, and the floating member 185 moves upward due to the buoyancy of the liquid refrigerant. (A). In accordance with the movement of the floating member 185, the lower portion of the floating member 185 opens the discharge port 181b.

Accordingly, the liquid refrigerant in the second space portion 181a flows downward and is discharged to the outside of the dryer 180 through the discharge port 181b.

On the other hand, the gaseous refrigerant in the refrigerant flowing through the inlet 181a is discharged to the outside of the dryer 180 through the outlet 191 of the pipe. The refrigerant in the piping outlet 191 flows to one side of the second evaporator 160 via the guide pipe 190.

The gaseous refrigerant indirectly exchanges heat with the second evaporator 160. That is, the gaseous refrigerant can be phase-changed into liquid refrigerant by being condensed by the low-temperature refrigerant.

The phase-changed refrigerant flows into the pipe inlet 192 through the guide pipe 190 and flows into the interior of the dryer 185 and into the internal space of the floating member 185. The refrigerant may be discharged to the outside of the dryer 180 through the outlet 181b together with the liquid refrigerant present in the dryer 180 (B).

FIG. 6 is a diagram illustrating a refrigerant cycle configuration of a refrigerator according to a first embodiment of the present invention.

Referring to FIG. 6, the refrigerator 10 according to the first embodiment of the present invention includes a plurality of devices for driving a refrigeration cycle.

In detail, the refrigerator 10 includes a plurality of compressors 111 and 115 for compressing refrigerant, a condenser 120 for condensing the refrigerant compressed by the compressors 111 and 115, A plurality of expansion devices 141 and 143 for reducing the pressure of the refrigerant and a plurality of evaporators 150 and 160 for evaporating the refrigerant decompressed in the plurality of expansion devices 141 and 143.

The refrigerator 10 includes a refrigerant pipe 100 connecting the plurality of compressors 111 and 115, the condenser 120, the expansion devices 141 and 143, and the evaporators 150 and 160 to guide the flow of the refrigerant.

The plurality of compressors 111 and 115 include a first compressor 111 and a second compressor 115.

For example, when all of the plurality of compressors 111 and 115 are driven, the second compressor 115 is a "low-pressure compressor" Pressure compressor "that further compresses the refrigerant compressed in the second compressor 115 (two-stage compression). When both of the compressors 111 and 115 are driven, the simultaneous cooling operation of the refrigerating chamber 20 and the freezing chamber 30 can be performed.

On the other hand, when only the first compressor 111 of the plurality of compressors 111 and 115 is operated, a single cooling operation of the storage room in which the first evaporator 150 is installed, for example, the refrigerating chamber 20, may be performed.

The plurality of evaporators 150 and 160 may include a first evaporator 150 for generating cold air to be supplied to one of the refrigerating compartment 20 and the freezing compartment 30 and a second evaporator 150 for generating cold air to be supplied to the other storage compartment A second evaporator 160 is included.

For example, as described above, the first evaporator 150 generates cold air to be supplied to the refrigerating chamber 20, and may be disposed at one side of the refrigerating chamber 20. The second evaporator 160 generates cool air to be supplied to the freezer compartment 30 and may be disposed at one side of the freezer compartment 30.

The temperature of the cool air supplied to the freezer compartment 30 may be lower than the temperature of the cool air supplied to the refrigerating compartment 20 so that the refrigerant evaporation pressure of the second evaporator 160 It may be lower than the evaporation pressure of the refrigerant.

The outlet refrigerant pipe 100 of the second evaporator 160 extends to the inlet side of the second compressor 115. Therefore, the refrigerant having passed through the second evaporator 160 can be sucked into the second compressor 115.

The refrigerator 10 includes a dryer 130 installed at the outlet side of the condenser 120 to remove moisture or impurities contained in the refrigerant condensed in the condenser 120, A guide pipe 190 extending to one side of the evaporator 160 is included.

The guide pipe 190 is provided with a pipe outlet 191 for guiding the gaseous refrigerant present in the dryer 180 to the outside of the dryer 180 and a refrigerant heat exchanged with the evaporator 160, And a pipe inlet 192 for guiding the inside of the pipe 180 to the inside thereof. That is, the flow direction of the refrigerant flows from the piping outlet 191 to one side of the second evaporator 160 and is determined to flow from the piping inlet 192 to the dryer 180.

The guide pipe 190 further includes a check valve 196 for forcing the refrigerant flow direction in the guide pipe 190 in one direction. The refrigerant flow from the piping inlet 192 to the second evaporator 160 is limited by the check valve 196. For example, the check valve 196 may be installed in the pipe inlet 192.

A flow regulator 130 is installed at the outlet of the dryer 180. The flow control unit 130 controls the flow of the refrigerant so that at least one of the first and second evaporators 150 and 160 is operated, that is, when the refrigerant is supplied to one of the first and second evaporators 150, (150, 160) at the same time.

The flow regulator 130 includes a three-way valve having one inlet through which the refrigerant is introduced and two outlets through which the refrigerant is discharged.

A plurality of refrigerant passages (101, 103) are connected to two outflow portions of the flow regulating portion (130). The first refrigerant passage 101 and the second evaporator 160 are provided in the plurality of refrigerant passages 101 and 103 and are provided at an inlet side of the first evaporator 150 to guide refrigerant into the first evaporator 150, And a second refrigerant passage (103) provided on the inlet side of the second evaporator (160) for guiding the inflow of the refrigerant into the second evaporator (160).

The first and second refrigerant passages 101 and 103 are branched passages of the refrigerant pipe 100 and may be referred to as "first and second evaporation passages", respectively. It is understood that the flow regulating unit 130 is installed in a branched branch branching to the first and second refrigerant flow paths 101 and 103.

Therefore, the refrigerant passing through the flow regulating unit 130 can be branched into the first and second refrigerant passages 101 and 103 and discharged. The outflow portions connected to the first and second refrigerant passages 101 and 103 are called "first outflow portion" and "second outflow portion", respectively.

At least one outlet of the first and second outflows may be open. For example, when both the first and second outlet portions are opened, the refrigerant flows through the first and second refrigerant passages 101 and 103. On the other hand, when the first outlet portion is opened and the second outlet portion is closed, the refrigerant flows through the first refrigerant passage (101).

Of course, when the first outflow portion is closed and the second outflow portion is opened, the refrigerant may flow only through the second refrigerant passage 103.

The second refrigerant passage (103) may be provided with a second expansion device (143) for expanding the refrigerant to be introduced into the second evaporator (160). The second expansion device 143 may include a capillary tube.

The cool air passing through the second evaporator 160 may be cooled to a temperature lower than that of the first evaporator 150 to be supplied to the freezer chamber 30.

The refrigerator (10) includes a blowing fan (125, 155, 165) provided at one side of the heat exchanger to blow air. A condensing fan 125 provided at one side of the condenser 120, a first evaporation fan 155 provided at one side of the first evaporator 150 and a second evaporation fan 155 provided at one side of the first evaporator 150 are installed in the blowing fans 125, And a second evaporation fan 165 provided on one side of the evaporation fan 165.

As described above, the first evaporation fan 155 may be a refrigerator compartment fan, and the second evaporation fan 165 may be a freezer compartment fan.

The heat exchange capacity of the first and second evaporators 150 and 160 may vary according to the rotation speed of the first and second evaporation fans 155 and 165. For example, when the first evaporator 150 or the second evaporator 160 needs to generate a large amount of cold air, the rotation speed of the first evaporator fan 155 or the second evaporator 160 increases The rotation speed of the first evaporation fan 155 or the second evaporator 160 may be reduced.

Other embodiments are suggested.

3, the guide pipe 190 extends from the dryer 180 to one side of the second evaporator 160, and the refrigerant flowing through the second evaporator 160 flows into the second evaporator 160. In this embodiment, That is, heat exchange with the low temperature air around the second evaporator 160. [

Alternatively, the guide pipe 190 may extend to one side of the first evaporator 150 to be indirectly connected to the refrigerant flowing in the first evaporator 150, that is, Heat exchange with the air.

Meanwhile, the guide pipe 190 may be branched and extended to one side of the first evaporator 150 and the second evaporator 160.

As another example, the guide pipe 190 may be disposed so as to pass through the rear space of the inner case 13, particularly, the peripheral area of the cold room discharge unit 22 or the freezer discharge unit.

Hereinafter, a second embodiment of the present invention will be described. Since the present embodiment differs from the first embodiment in some configurations, the description and the reference numerals of the first embodiment are used for the same portions as those in the first embodiment.

8 is a block diagram showing a configuration of a refrigerator according to a second embodiment of the present invention. FIG. 9 is a block diagram of a refrigerator according to a second embodiment of the present invention. 2 is a flow chart showing a control method of a refrigerator according to an embodiment.

7, a refrigerator 10 'according to a second embodiment of the present invention includes a plurality of compressors 111 and 115, a condenser 120, a flow control unit 130, A plurality of expansion devices 141 and 143, and a blowing fan 125, 155, and 165, respectively.

The refrigerator 10 'further includes a hot line pipe 250 provided at an outlet side of the condenser 120 to guide the high-pressure condensed refrigerant passed through the condenser 120 to the front side of the main body 11 . The hot line pipe 250 may be installed inside the inner case 13 at a position where the main body 11 and the refrigerator compartment door 25 are in contact with each other.

The hot line pipe 250 can be heated by the high temperature and high pressure refrigerant to dissipate heat. The divergent heat acts on the front side of the main body 11, and the temperature difference between the inside and the outside of the main body 11, It is possible to prevent dew on the front surface.

A bypass valve 230 is provided on the inlet side of the hot-line pipe 250 to control the amount of refrigerant flowing into the hot-line pipe 250 or the inflow time of the refrigerant.

The bypass valve 230 is disposed between the outlet of the condenser 120 and the inlet of the dryer 180. The hot-line pipe 250 extends from the bypass valve 230 to the dryer 180.

The refrigerator 10 'further includes a bypass pipe 232 extending from the bypass valve 230 to the dryer 180 and guiding the refrigerant to bypass the hotline pipe 250.

The bypass valve 230 includes a three-way valve for guiding the refrigerant to at least one of the hot line pipe 250 and the bypass pipe 232.

The bypass valve 230 may be operated to flow the refrigerant to the hot line pipe 250 or the bypass pipe 232. For example, when the bypass valve 230 is turned on, the refrigerant flowing into the bypass pipe 232 is shut off and all the refrigerant flows to the hotline pipe 250, and the bypass valve 230 The refrigerant flow to the hot line pipe 250 is blocked and all the refrigerant can flow to the bypass pipe 232. [

Here, "on operation" is understood as "one direction control" of the bypass valve 230 and "off operation" is understood as "other direction control" of the bypass valve 230 do.

As another example, the bypass valve 230 may be operated to flow some of the refrigerant to the hotline piping 250 and to flow the remaining refrigerant to the bypass piping 232.

The refrigerant condensed in the condenser 120 flows into the bypass valve 230 and is supplied to at least one of the hot line pipe 250 and the bypass pipe 232 in accordance with the operation state of the bypass valve 230 To the piping.

For example, if there is a high possibility of dew formation in the refrigerator according to a predetermined condition, the bypass valve 230 may be operated such that the amount of refrigerant flowing to the hot line pipe 250 is large or the flow time is long.

On the other hand, when there is less possibility of dew formation in the refrigerator, the bypass valve 230 may be operated so that the amount of refrigerant flowing to the hotline pipe 250 is small or the flow time is shortened.

A dryer 180 is disposed at the outlet side of the hot-line pipe 250 or the bypass pipe 232. The refrigerant flowing through the hot line pipe 250 or the bypass pipe 232 flows into the dryer 180. The dryer 180 removes impurities or moisture from the refrigerant or temporarily stores the liquid refrigerant.

The refrigerator 10 'includes a guide pipe 190 described in the first embodiment and a check valve 196 installed in the guide pipe 196.

The refrigerant having passed through the dryer 180 flows into the flow regulating unit 130 and flows through the first expansion device 141 or the second expansion device 143 to the first evaporator 150 or the second evaporator 143. [ And may be introduced into the evaporator 160.

Referring to FIG. 8, the refrigerator 10 'according to the second embodiment of the present invention includes a humidity sensor 261 for detecting the humidity value outside the refrigerator, and a humidity sensor 261 for accumulating the operation time of the bypass valve 230 A timer 262 and a control unit 270 for controlling the operation of the bypass valve 230 based on the humidity value sensed by the humidity sensor 261.

A control method of a refrigerator according to a second embodiment of the present invention will be described with reference to FIG.

When the operation of the refrigerator 10 'is started, the humidity sensor 261 senses the humidity outside the refrigerator (S11, S12).

It is recognized whether the humidity value sensed by the humidity sensor 261 is equal to or higher than a set value. If the sensed humidity value is equal to or greater than the set value, it is recognized that the possibility of dew formation on the front portion of the refrigerator main body is large.

Accordingly, the bypass valve 230 can be operated to allow the refrigerant to flow toward the hot line pipe 250 side. In other words, the bypass valve 230 can be operated so that the time for the refrigerant to flow to the hotline piping 250 is increased.

For example, when the bypass valve 230 is a valve for switching the refrigerant in one direction or the other direction, the bypass valve 230 is turned on, so that all refrigerant that has passed through the condenser 120 flows into the hot- (Not shown). At this time, the on-operation time of the bypass valve 230 may be determined to be a value that is longer than the set time, that is, a time value that is larger than the off-time value.

As another example, when the bypass valve 230 is a valve for distributing the refrigerant in one direction and the other direction, the bypass valve 230 may be opened such that the opening of the refrigerant flow path toward the hot- (S13, S14) so as to be larger than the opening degree of the refrigerant flow path to the pipe 232.

On the other hand, if the sensed humidity value is less than the preset value, it is recognized that the possibility of dew formation on the front portion of the refrigerator main body is low.

Therefore, the bypass valve 230 can be operated so that the refrigerant can be flowed to the hot-line pipe 250 side to a less extent. In other words, the bypass valve 230 can be operated so that the time for the refrigerant to flow to the hotline piping 250 is reduced.

For example, when the bypass valve 230 is a valve for switching the refrigerant in one direction or the other direction, the bypass valve 230 is operated to be off so that all of the refrigerant passing through the condenser 120 is bypassed And can be guided to the pipe 232. At this time, the time for which the bypass valve 230 is turned off may be determined to be a value greater than the set time, i.e., a value greater than the on-time value.

As another example, when the bypass valve 230 is a valve for distributing the refrigerant in one direction and the other direction, the bypass valve 230 may be opened when the opening degree of the refrigerant passage toward the bypass pipe 232 is higher than the opening degree of the hot line May be controlled so as to be larger than the opening of the refrigerant flow path toward the pipe 250 (S15).

According to this control method, the operation of the bypass valve can be controlled in accordance with the humidity condition outside the refrigerator, so that the amount of refrigerant flowing through the hot-line pipe or the refrigerant flow time can be controlled. Thus, dew formation of the refrigerator can be prevented, It is possible to prevent the refrigerant flowing through the hot line pipe from excessively increasing the load of the refrigerator.

10: Refrigerator 11: Body
12: outer case 13: inner case
111, 115: first and second compressors 120: condenser
130: flow regulator 141: first expansion device
143: second expansion device 150: first evaporator
160: Second evaporator 170: Gas-liquid separator
180: dryer 182: filter element
183: Support part 190: Guide pipe
191: piping outlet 192: piping inlet
196: Check valve 230: Bypass valve
232: Inlet piping 250: Hotline piping

Claims (14)

A compressor for compressing the refrigerant;
A condenser for condensing the refrigerant compressed in the compressor;
A condenser for condensing the condensed refrigerant, a dryer for removing impurities or moisture from the refrigerant;
A flow regulator disposed at an outlet side of the dryer for switching or regulating the flow of the refrigerant;
A plurality of evaporators connected to the flow regulating unit; And
And a guide pipe extending from the dryer to one side of at least one evaporator of the plurality of evaporators to guide cooling of the refrigerant. The method according to claim 1,
In the at least one evaporator,
A refrigerant tube through which the refrigerant flows; And
And a fixing bracket for fixing the refrigerant tube and the guide pipe. The method according to claim 1,
In the guide pipe,
A pipe outlet connected to one side of the dryer to guide the refrigerant to the at least one evaporator; And
And a pipe inlet connected to the other side of the dryer to allow the refrigerant cooled from the at least one evaporator to flow into the dryer. The method of claim 3,
Further comprising a check valve installed at the pipeline inlet to limit the flow of refrigerant from the pipeline inlet to the at least one evaporator. The method according to claim 1,
In the dryer,
A dryer main body forming an internal space;
At least one filter member disposed in an inner space of the dryer body; And
And a support portion for supporting a lower side of the filter member. 6. The method of claim 5,
Between the inner peripheral surface of the dryer body and the outer peripheral surface of the supporting portion,
And a first space portion for guiding downward the liquid refrigerant introduced into the dryer is formed. 6. The method of claim 5,
In the dryer,
The refrigerator according to claim 1, further comprising a floating member spaced below the support portion and being provided to be movable in a vertical direction. 8. The method of claim 7,
In the dryer,
An inlet port formed in the upper portion of the dryer body to guide the inflow of the refrigerant; And
And a discharge port formed at a lower portion of the dryer body for guiding the discharge of the refrigerant and being selectively opened and closed by the floating member. The method according to claim 1,
A body forming a storage chamber;
A door that opens and closes the main body; And
And a hot line pipe for guiding the refrigerant having passed through the condenser to the front portion of the main body. 10. The method of claim 9,
On the inlet side of the hot-line pipe,
Wherein a bypass valve is provided for controlling an amount of refrigerant flowing into the hot line pipe or an inflow time of the refrigerant. 11. The method of claim 10,
Further comprising a bypass pipe extending from the bypass valve to the dryer and guiding the refrigerant to bypass the hotline piping. A control method of a refrigerator including a compressor for compressing refrigerant, a condenser for condensing the refrigerant compressed in the compressor, and a hot line pipe for guiding the refrigerant having passed through the condenser to the front portion of the refrigerator main body to prevent dew formation,
Sensing a humidity outside the refrigerator; And
Determining whether the sensed humidity is equal to or greater than a predetermined value, and adjusting the amount of refrigerant flowing through the hot line pipe or the flow time of the refrigerant. 13. The method of claim 12,
And controlling the bypass valve connected to the hotline pipe to increase the refrigerant flow time to the hotline pipe if the sensed humidity is equal to or higher than a set value. 13. The method of claim 12,
And controlling the bypass valve connected to the hotline pipe to reduce the refrigerant flow time to the hotline pipe if the sensed humidity is less than the set value.

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