KR102150058B1 - A refrigerator and a control method the same - Google Patents

Abstract

The present invention relates to a refrigerator.
The refrigerator according to the present embodiment includes: a compressor for compressing a refrigerant; A condenser for condensing the refrigerant compressed by the compressor; A first expansion device for decompressing the refrigerant condensed in the condenser; A gas-liquid separator for separating the refrigerant depressurized by the first expansion device into a liquid refrigerant and a gaseous refrigerant; A first evaporator and a second evaporator through which the liquid refrigerant separated by the gas-liquid separator flows; And a second expansion device provided at an inlet side of the second evaporator to decompress the refrigerant.

Description

Refrigerator {A refrigerator and a control method the same}

The present invention relates to a refrigerator.

In general, a refrigerator is provided with a plurality of storage compartments in which storage materials are accommodated to freeze or refrigerate food, and one surface of the storage compartment is opened to receive and take out the food. The plurality of storage chambers include a freezing chamber for frozen storage of food and a refrigerating chamber for refrigerating storage of food.

In the refrigerator, a refrigeration system in which refrigerant circulates is driven. Devices constituting the refrigeration system include a compressor, a condenser, an expansion device, and an evaporator. The evaporator may include a first evaporator provided on one side of the refrigerating compartment and a second evaporator provided on 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 may be supplied back to the refrigerating chamber. In addition, the cold air stored in the freezing chamber is cooled while passing through the second evaporator, and the cooled cold air may be supplied back to the freezing chamber.

As described above, in a conventional refrigerator, independent cooling is performed in a plurality of storage rooms through separate evaporators.

In this regard, the present applicant has received a patent registration (prior patent registration number 10-1275184, registration date June 10, 2013).

According to such a conventional refrigerator, the refrigerant flowing into the first and second evaporators is depressurized by an expansion device to form a two-phase state, for example, a two-phase state with a somewhat high dryness, and the heat exchange efficiency in the first and second evaporators decreases There was a problem.

In addition, the refrigerant may be selectively supplied to the first evaporator or the second evaporator according to the cooling operation mode, that is, whether the refrigerating chamber or the freezing chamber is cooled. In this case, a phenomenon in which the amount of refrigerant circulating in the refrigeration cycle becomes insufficient may occur depending on the operation mode condition.

An object of the present embodiment is to provide a refrigerator with improved operating efficiency in order to solve this problem.

The refrigerator according to the present embodiment includes: a compressor for compressing a refrigerant; A condenser for condensing the refrigerant compressed by the compressor; A first expansion device for decompressing the refrigerant condensed in the condenser; A gas-liquid separator for separating the refrigerant depressurized by the first expansion device into a liquid refrigerant and a gaseous refrigerant; A first evaporator and a second evaporator through which the liquid refrigerant separated by the gas-liquid separator flows; And a second expansion device provided at the inlet side of the second evaporator to decompress the refrigerant.

In addition, a flow control unit provided at an inlet side of the first and second evaporators and flowing the liquid refrigerant into at least one of the first and second evaporators is further included.

In addition, a first refrigerant flow path extending from the flow control unit to the first evaporator; And a second refrigerant passage extending from the flow controller to the second evaporator.

In addition, a main body including a refrigerating chamber and a freezing chamber is further included, wherein the first evaporator is a refrigerating chamber evaporator for cooling the refrigerating chamber, and the second evaporator is a freezing chamber evaporator for cooling the freezing chamber.

In addition, a liquid discharge unit that discharges the liquid refrigerant separated from the gas-liquid separator and extends to the flow control unit; And a gaseous refrigerant discharge unit that discharges the gaseous refrigerant separated from the gas-liquid separator, and extends to an outlet side of the first evaporator.

In addition, the gas-liquid separator includes a gas-liquid separation body having an inlet coupling portion to which an inlet pipe of the refrigerant is coupled; And a separation device provided inside the gas-liquid separation body and separating the introduced refrigerant into a liquid refrigerant and a gaseous refrigerant.

In addition, the separating device includes: a separating body disposed so as to face the inflow coupling portion; And at least one or more grooves formed on the surface of the separating body.

In addition, the groove portion is characterized in that it extends to be rounded downward to guide the discharge of the liquid refrigerant downward.

In addition, the main body includes an outer case, an inner case, and a rear panel shielding the inner case, and the gas-liquid separator is disposed in a heat exchange chamber formed between the inner case and the rear panel. .

In addition, the flow control unit is characterized in that it is disposed in a heat exchange chamber formed between the inner case and the rear panel.

A refrigerator according to another aspect includes: first and second compressors for compressing a refrigerant; A condenser for condensing the refrigerant compressed by the first and second compressors; A first capillary for decompressing the refrigerant condensed in the condenser; A gas-liquid separator for receiving the refrigerant depressurized by the first expansion device; A liquid discharge unit extending from a lower portion of the gas-liquid separator; A gaseous refrigerant discharge unit extending from an upper portion of the gas-liquid separator; A flow control unit connected to the liquid discharge unit; First and second refrigerant passages branched from the flow control unit; A refrigerating chamber evaporator installed in the first refrigerant passage; And a freezing chamber evaporator installed in the second refrigerant passage.

Further, a second capillary installed in the second refrigerant passage to pressurize the refrigerant is further included.

In addition, the gas phase refrigerant discharge unit is characterized in that the bypass flow path connected to the outlet side of the refrigerating chamber evaporator.

According to the proposed embodiment, a gas-liquid separator is provided on the inlet side of the evaporator, and the liquid refrigerant can be separated from the two-phase refrigerant decompressed in the first expansion device and supplied to the first evaporator or the second evaporator. There is an advantage that the dryness of the refrigerant can be reduced.

In addition, by reducing the dryness of the refrigerant flowing into the evaporator, the heat exchange efficiency in the evaporator can be improved, and accordingly, power consumption can be improved.

In addition, since the gaseous refrigerant separated by the gas-liquid separator can be supplied to the refrigeration cycle by bypassing the outlet side of the first evaporator, there is an advantage in that it is possible to prevent an insufficient amount of refrigerant.

In addition, since the gas-liquid separator and the flow control unit are disposed at the rear side of the cooling chamber rather than the machine room generating high temperature, it is possible to prevent an increase in dryness due to heating of the refrigerant flowing into the evaporator.

In addition, by disposing a separation device having a groove in the gas-liquid separator, there is an advantage that gas-liquid separation of the two-phase refrigerant introduced into the gas-liquid separator can be easily performed.

1 is a view showing the configuration of a refrigerator according to an embodiment of the present invention.
2 is a system diagram showing a configuration of a refrigeration cycle of a refrigerator according to an embodiment of the present invention.
3 is a view showing a view from the front of the refrigerator with respect to a part of the configuration of the refrigerator according to an embodiment of the present invention.
4 is a view showing a view from the rear of the refrigerator with respect to a part of the configuration of the refrigerator according to an embodiment of the present invention.
5 is an enlarged view of portion "A" of FIG. 3.
6 is a view showing the internal configuration of a gas-liquid separator according to an embodiment of the present invention.

Hereinafter, specific embodiments of the present invention will be described with reference to the drawings. However, the spirit of the present invention is not limited to the presented embodiments, and those skilled in the art who understand the spirit of the present invention will be able to easily propose other embodiments within the scope of the same idea.

1 is a view showing the configuration of a refrigerator according to an embodiment of the present invention.

Referring to FIG. 1, a refrigerator 10 according to an embodiment of the present invention includes a main body 20 in which a freezing chamber F and a refrigerating chamber R are formed. The freezing chamber (F) and the refrigerating chamber (R) are independently formed in the main body 2 and may be partitioned by a partition wall 25.

In the drawing, the idea that the freezing chamber (F) and the refrigerating chamber (R) are spaced apart from each other is disclosed, but unlike this, the freezing chamber (F) and the refrigerating chamber (R) may be arranged vertically spaced apart.

The main body 20 includes a freezing compartment door 32 for opening and closing the freezing compartment F and a refrigerating compartment door 34 for opening and closing the refrigerating compartment R.

In addition, the main body 20 includes an outer case 41 forming the exterior of the refrigerator 10, and a freezing compartment inner case 45 disposed inside the outer case 41 and forming an inner surface of the freezing compartment F. ) And a refrigerating compartment inner case 43 disposed inside the outer case 41 and forming an inner surface of the refrigerating compartment R.

The refrigerator 10 includes a plurality of evaporators 150 and 160 for independently cooling the refrigerating chamber R and the freezing chamber F, respectively. The plurality of evaporators 150 and 160 include a first evaporator 150 for cooling any one of the refrigerating chamber R and the freezing chamber F, and a second evaporator 160 for cooling the other storage chamber. .

For example, the first evaporator 150 may be a refrigerating chamber evaporator for cooling the refrigerating chamber R, and the second evaporator 160 may be a freezing chamber evaporator for cooling the freezing chamber F. Hereinafter, it will be described based on this.

In the main body 20, a freezing chamber that divides the inner space of the freezing chamber inner case 45 into a freezing chamber F in which food is stored frozen and a freezing heat exchange chamber 161 (see FIG. 3) in which the freezing chamber evaporator 160 is accommodated. A rear panel 49 is included. That is, the freezing compartment rear panel 49 may be understood as a “freezing compartment cover” as a storage compartment cover that shields the freezing heat exchange compartment 161 from the freezing compartment F.

In the freezing compartment rear panel 49, the cold air inlet 49a through which the cold air in the freezing compartment F flows into the freezing heat exchange compartment 161 and the cold air cooled by the freezing compartment evaporator 160 is discharged to the freezing compartment F A cold air discharge port 49b may be formed.

In addition, a freezing chamber fan 165 as a “blowing fan” for circulating the air in the freezing chamber F to the freezing heat exchange chamber 161 and the freezing chamber F may be disposed in the freezing heat exchange chamber 161.

In the main body 20, a refrigerating compartment rear that divides the interior of the refrigerating compartment inner case 43 into a refrigerating compartment R in which food is refrigerated and a refrigerated heat exchange compartment 151 (see FIG. 3) in which the refrigerating compartment evaporator 150 is accommodated. Panel 47 is included. The refrigerated heat exchange chamber 151 and the refrigerated heat exchange chamber 161 may be combined to be referred to as “heat exchange chamber”.

That is, the refrigerating compartment rear panel 47 may be understood as a “refrigerating compartment cover” as a storage compartment cover that shields the refrigerated heat exchange compartment 151 from the refrigerating compartment R. The refrigerating compartment cover and the freezing compartment cover may be provided on both sides of the partition wall 25.

The cold air cooled by the cold air inlet 47a through which the cold air of the refrigerating chamber R flows into the refrigerating heat exchange chamber 151 and the cold air cooled by the refrigerating chamber evaporator 150 are discharged to the refrigerating chamber R to the refrigerating compartment rear panel 47 A cold air discharge port 47b may be formed.

In addition, in the refrigerating heat exchange chamber 151, a refrigerating chamber fan 155 as a “blowing fan” for circulating the air in the refrigerating chamber R to the refrigerating chamber heat exchange chamber 151 and the refrigerating chamber R may be disposed.

2 is a system diagram showing a configuration of a refrigeration cycle of a refrigerator according to an embodiment of the present invention.

Referring to FIG. 2, a refrigerator 10 according to an 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 a refrigerant, a condenser 120 for condensing the refrigerant compressed by the plurality of compressors 111 and 115, and the condensed at the condenser 120. A plurality of expansion devices 141 and 143 for decompressing the refrigerant and a plurality of evaporators 150 and 160 for evaporating the refrigerant depressurized by the plurality of expansion devices 141 and 143 are included.

In addition, the refrigerator 10 includes a refrigerant pipe 100 connecting the plurality of compressors 111 and 115, condensers 120, expansion devices 141, 143 and 145, and 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 the plurality of compressors 111 and 115 are all driven, the second compressor 115 is a “low pressure compressor” that is disposed on the low pressure side to compress the refrigerant in one stage, and the first compressor 115 is the It is understood as a "high pressure compressor" that further compresses (two-stage compression) the refrigerant compressed in the second compressor 115. When all of the plurality of compressors 111 and 115 are driven, simultaneous cooling operation of the refrigerating chamber R and the freezing chamber F may 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 compartment in which the first evaporator 150 is installed, for example, the refrigerating compartment R may be performed.

In the plurality of evaporators 150 and 160, a first evaporator 150 for generating cold air to be supplied to one of the refrigerating chamber R and the freezing chamber F, and a first evaporator 150 for generating cold air to be supplied to the other storage chamber. A second evaporator 160 is included.

For example, the first evaporator 150 generates cold air to be supplied to the refrigerating chamber R, and may be disposed on one side of the refrigerating chamber R. In addition, the second evaporator 160 generates cold air to be supplied to the freezing chamber F, and may be disposed on one side of the freezing chamber F.

The temperature of the cold air supplied to the freezing chamber (F) may be lower than the temperature of the cold air supplied to the refrigerating chamber (R). Accordingly, the refrigerant evaporation pressure of the second evaporator 160 is It may be lower than the refrigerant evaporation pressure.

The outlet side refrigerant pipe 100 of the second evaporator 160 extends toward the inlet side of the second compressor 115. Accordingly, the refrigerant that has passed through the second evaporator 160 may be sucked into the second compressor 115.

In the refrigerator 10, a dryer 130 installed at an outlet side of the condenser 120 to remove moisture or impurities contained in the refrigerant condensed in the condenser 120 and an outlet side of the dryer 130 A gas-liquid separator 170 is further included to separate the liquid refrigerant and the gaseous refrigerant among the refrigerants.

The plurality of expansion devices 141 and 143 includes a first expansion device 141 provided at the outlet side of the dryer 130 to decompress the refrigerant. The first expansion device 141 may include a capillary tube.

An inlet pipe 172 extending to the gas-liquid separator 170 and guiding the refrigerant to the gas-liquid separator 170 is provided at the outlet side of the first expansion device 141.

Among the refrigerants introduced into the gas-liquid separator 170 through the inlet pipe 172, a liquid refrigerant may be contained in a lower portion of the gas-liquid separator 170, and a gaseous refrigerant may be filled in the upper portion.

One side of the gas-liquid separator 170 is provided with a liquid discharge unit 173 for discharging the liquid refrigerant separated by the gas-liquid separator 170. The liquid discharge part 173 may be connected to the lower part of the gas-liquid separator 170.

Further, on the other side of the gas-liquid separator 170, a gas-phase refrigerant discharge unit 190 for discharging the gas-phase refrigerant separated by the gas-liquid separator 170 is provided. The vapor phase refrigerant discharge unit 190 may be connected to an upper portion of the gas-liquid separator 170.

The liquid discharge part 173 is connected to the flow control part 180. The flow control unit 180 operates so that at least one of the first and second evaporators 150 and 160 is operated, that is, the refrigerant is applied to any one of the first and second evaporators 150, or the first and second evaporators. It can be understood as a device that controls the flow of the refrigerant so that it flows into 150 and 160 simultaneously.

The flow control unit 180 includes a three-way valve having one inlet portion through which the refrigerant flows and two outlet portions through which the refrigerant is discharged.

A plurality of refrigerant passages 101 and 103 are connected to the two outlet portions of the flow control unit 180. In the plurality of refrigerant passages 101 and 103, the first refrigerant passage 101 and the second evaporator 160 are provided at the inlet side of the first evaporator 150 to guide the inflow of refrigerant into the first evaporator 150. ) Is provided at the inlet side of the second refrigerant flow path 103 for guiding the inflow of the refrigerant into the second evaporator 160.

The first and second refrigerant passages 101 and 103 are branch passages of the refrigerant pipe 100 and may be referred to as “first and second evaporation passages”, respectively. In addition, it is understood that the flow control unit 180 is installed in a branch portion branched into the first and second refrigerant passages 101 and 103.

Accordingly, the refrigerant passing through the flow control unit 180 may be branched into the first and second refrigerant passages 101 and 103 and discharged. The outlet portions connected to the first and second refrigerant passages 101 and 103 are referred to as "first outlet" and "second outlet", respectively.

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

Of course, when the first outlet is closed and the second outlet is open, the refrigerant may flow only through the second refrigerant passage 103.

A second expansion device 143 for expanding the refrigerant to be introduced into the second evaporator 160 may be installed in the second refrigerant passage 103. The second expansion device 143 may include a capillary tube.

The refrigerant flowing through the second refrigerant passage 103 may be depressurized while passing through the second expansion device 143. Accordingly, the evaporation pressure of the refrigerant flowing into the second evaporator 160 may be lower than the evaporation pressure of the refrigerant flowing into the first evaporator 150.

In addition, the cold air passing through the second evaporator 160 may cool the first evaporator 150 to a temperature lower than that of the cold air, and may be supplied to the freezing chamber F.

The refrigerator 10 includes blowing fans 125, 155, and 165 provided on one side of the heat exchanger to blow air. The blowing fans 125, 155, and 165 include a condensing fan 125 provided at one side of the condenser 120, a first evaporating fan 155 provided at one side of the first evaporator 150, and the second evaporator 160. A second evaporation fan 165 provided on one side of) is included.

As described above, the first evaporating fan 155 may be a refrigerating chamber fan, and the second evaporating fan 165 may be a freezing chamber fan.

The heat exchange capacity of the first and second evaporators 150 and 160 may vary according to the rotational speed of the first and second evaporating fans 155 and 165. For example, when the first evaporator 150 or the second evaporator 160 is required to generate a lot of cold air, the rotational speed of the first evaporator fan 155 or the second evaporator 160 increases. If cold air is sufficient, the rotation speed of the first evaporation fan 155 or the second evaporator 160 may be reduced.

Meanwhile, since the liquid discharge part 173 is connected to the flow control part 180, the liquid refrigerant separated by the gas-liquid separator 170 passes through the flow control part 180, and the first refrigerant passage ( 101) or the second refrigerant flow path 103. Therefore, the state of the refrigerant flowing into the first evaporator 150 or the second evaporator 160 may form a liquid phase, thereby improving heat exchange efficiency in the first and second evaporators 150 and 160, that is, evaporation efficiency. Can be.

The gaseous refrigerant discharge unit 190 extends toward the outlet side of the first evaporator 150. That is, one side of the vapor phase refrigerant discharge unit 190 is connected to the upper portion of the gas-liquid separator 170, and the other side is connected to the outlet pipe of the first evaporator 150. The vapor phase refrigerant discharge unit 190 may be referred to as a "bypass flow path" in that it bypasses the first evaporator 150 or the second evaporator 160.

Accordingly, the gaseous refrigerant separated by the gas-liquid separator 170 may be introduced to the outlet side of the first evaporator 150 and sucked into the first compressor 111, thereby preventing a shortage of refrigerant circulating in the refrigeration system. can do.

3 is a view showing a partial configuration of a refrigerator according to an embodiment of the present invention as viewed from the front of the refrigerator, and FIG. 4 is a view showing a partial configuration of the refrigerator according to an embodiment of the present invention, viewed from the rear of the refrigerator It is a drawing showing.

3 and 4, a refrigerating heat exchange chamber 151 in which the first evaporator 150 is disposed and the second evaporator 160 are disposed on the rear wall of the refrigerator body 20 according to an embodiment of the present invention. A refrigeration heat exchange chamber 161 to be disposed is included.

The refrigerating heat exchange chamber 151 is provided on one side of the first evaporator 150 and accommodates a first evaporation fan 155 and the first evaporation fan 155 for circulating cool air therein to receive the first evaporator 150. A first flow guide 157 that guides the cold air passing through the evaporation fan 155 to the cold air discharge port 47b is installed.

The refrigeration heat exchange chamber 161 is provided on one side of the second evaporator 160 to receive a second evaporation fan 165 and the second evaporation fan 165 for circulating cool air therein to A second flow guide 167 is installed that guides the cold air passing through the evaporation fan 165 to the cold air discharge port 49b.

A machine room 50 is formed under the main body 20. The machine room 50 may be connected to an indoor space in which the refrigerator 10 is installed, thereby forming room temperature. In the machine room 50, first and second compressors 111 and 115, a condenser 120, a condensing fan 125, and a dryer 130 may be installed.

Meanwhile, the gas-liquid separator 170 and the flow control unit 180 may be installed in the refrigerated heat exchange chamber 151. The refrigerated heat exchange chamber 151 has a relatively low temperature compared to the machine chamber 50. That is, since the gas-liquid separator 170 and the flow control unit 180 are installed in a low temperature environment, the refrigerant to be introduced into the first evaporator 150 or the second evaporator 160 is heated, so that the dryness of the refrigerant is It can prevent the phenomenon from rising. Therefore, it is possible to improve the evaporation efficiency of the refrigerant.

3 and 4, the gas-liquid separator 170 and the flow control unit 180 are shown to be installed in the refrigerated heat exchange chamber 151, but unlike this, the gas-liquid separator 170 and the flow control unit 180 ) May be installed in the refrigeration heat exchange chamber 161.

The first expansion device 141 may be installed in the refrigerating heat exchange chamber 151, and the second expansion device 143 may be installed in the freezing heat exchange chamber 161.

5 is an enlarged view of a portion "A" of FIG. 3, and FIG. 6 is a view showing an internal configuration of a gas-liquid separator according to an embodiment of the present invention.

5 and 6, in the gas-liquid separator 170 according to an embodiment of the present invention, a gas-liquid separation body 171 that forms a storage space for a refrigerant and the gas-liquid separation body 171 are provided inside, A separation device 175 for guiding separation of the refrigerant into liquid refrigerant and gaseous refrigerant is included.

The gas-liquid separating body 171 is substantially connected to the central portion of the inlet pipe 172. In the gas-liquid separation body 171, an inlet coupling portion 171a to which the inlet pipe 172 is coupled is formed.

The separating device 175 is installed adjacent to the inner side of the inlet coupling portion 171a so that the refrigerant may collide with the separating device 175 when the refrigerant flows through the inlet coupling portion 171a.

In detail, the separating device 175 includes a separating body 176 disposed to face the inflow coupling portion 171a, and a groove portion 177 formed on the surface of the separating body 176 to guide the separation of the refrigerant. Included.

The separating body 176 is formed to be round so that the liquid refrigerant and the gaseous refrigerant can be easily separated when the refrigerant collides with the separating main body 176. The separating body 176 may be referred to as a "collision plate".

A plurality of grooves 177 may be provided to be spaced apart from each other. In addition, the groove 177 may be formed to be gently inclined downward to guide the discharge of the liquid refrigerant downward.

According to this configuration, when the refrigerant flows into the gas-liquid separator 170, the refrigerant may collide with the separating body 176, and the gaseous refrigerant with a low specific gravity (dotted arrow) flows upward by the impact force. And, a liquid refrigerant having a large specific gravity (solid arrow) can be easily guided downward along the groove part 177.

The liquid discharge part 173 is connected to the lower part of the gas-liquid separation body 171, and the gaseous refrigerant discharge part 190 is connected to the upper part.

The liquid discharge part 173 is connected to the flow control part 180. In addition, the first refrigerant flow path 101 and the second refrigerant flow path 103 for branching the refrigerant are connected to the flow control unit 180.

10: refrigerator 20: main body
25: bulkhead 41: outer case
43: refrigerator compartment inner case 45: freezing compartment inner case
47: refrigerator compartment rear panel 49: freezing compartment rear panel
101: first refrigerant passage 103: second refrigerant passage
111,115: second compressor 120: condenser
130: dryer 141: first expansion device
143: second expansion device 150: first evaporator
151: refrigerated heat exchange chamber 160: second evaporator
161: refrigeration heat exchange chamber 170: gas-liquid separator
172: inlet pipe 173: liquid discharge part
180: flow control unit 190: gaseous refrigerant discharge unit

Claims (13)

A compressor including a second compressor that compresses the refrigerant and is disposed on the low pressure side, and a first compressor that further compresses the refrigerant compressed by the second compressor;
A condenser for condensing the refrigerant compressed by the compressor;
A first expansion device for decompressing the refrigerant condensed in the condenser;
A gas-liquid separator for separating the refrigerant depressurized by the first expansion device into a liquid refrigerant and a gaseous refrigerant;
A first evaporator and a second evaporator through which the liquid refrigerant separated by the gas-liquid separator flows; And
A second expansion device provided at the inlet side of the second evaporator to decompress the refrigerant,
The outlet pipe of the second evaporator extends to the inlet side of the second compressor, and allows the refrigerant passing through the second evaporator to be sucked into the second compressor,
The pipe at the outlet side of the first evaporator is connected to the outlet side of the second compressor, and allows the refrigerant passing through the first evaporator to be sucked into the first compressor together with the refrigerant compressed in the second compressor. Refrigerator. The method of claim 1,
A refrigerator further comprising a flow control unit provided at an inlet side of the first and second evaporators and flowing the liquid refrigerant into at least one of the first and second evaporators. The method of claim 2,
A first refrigerant flow path extending from the flow control unit to the first evaporator; And
A refrigerator further comprising a second refrigerant passage extending from the flow controller to the second evaporator. The method of claim 2,
A body including a refrigerator compartment and a freezer compartment is further included,
The first evaporator is a refrigerating chamber evaporator for cooling the refrigerating chamber,
The second evaporator is a refrigerator, characterized in that the freezing chamber evaporator for cooling the freezing chamber. The method of claim 2,
A liquid discharge part discharging the liquid refrigerant separated from the gas-liquid separator and extending to the flow control part; And
A refrigerator further comprising a vapor phase refrigerant discharge unit that discharges the gaseous refrigerant separated from the gas-liquid separator and extends to an outlet pipe of the first evaporator. The method of claim 1,
In the gas-liquid separator,
A gas-liquid separation body having an inlet coupling portion to which the inlet pipe of the refrigerant is coupled; And
A refrigerator provided inside the gas-liquid separation body and including a separation device for separating the introduced refrigerant into a liquid refrigerant and a gaseous refrigerant. The method of claim 6,
In the separation device,
A separating body disposed to face the inflow coupling portion; And
A refrigerator including at least one or more grooves formed on a surface of the separating body. The method of claim 7,
And the groove portion extends to be rounded downward to guide the discharge of the liquid refrigerant downward. The method of claim 4,
In the body,
An outer case, an inner case, and a rear panel shielding the inner case,
The gas-liquid separator is disposed in a heat exchange chamber formed between the inner case and the rear panel. The method of claim 9,
The flow control unit,
Refrigerator, characterized in that disposed in a heat exchange chamber formed between the inner case and the rear panel. First and second compressors compressing the refrigerant;
A condenser for condensing the refrigerant compressed by the first and second compressors;
A first capillary for decompressing the refrigerant condensed in the condenser;
A gas-liquid separator for receiving the refrigerant depressurized by the first expansion device;
A liquid discharge unit extending from a lower portion of the gas-liquid separator;
A gaseous refrigerant discharge unit extending from an upper portion of the gas-liquid separator;
A flow control unit connected to the liquid discharge unit;
First and second refrigerant passages branched from the flow control unit;
A refrigerating chamber evaporator installed in the first refrigerant passage; And
A freezing chamber evaporator installed in the second refrigerant flow path,
The outlet pipe of the freezing chamber evaporator extends to the inlet side of the second compressor, and allows the refrigerant passing through the freezing chamber evaporator to be sucked into the second compressor,
The outlet pipe of the refrigerating chamber evaporator is connected to the outlet side of the second compressor, and the refrigerant passing through the refrigerating chamber evaporator is sucked into the first compressor together with the refrigerant compressed by the second compressor. . The method of claim 11,
A refrigerator further comprising a second capillary installed in the second refrigerant passage to pressurize the refrigerant. The method of claim 11,
The vapor phase refrigerant discharge unit is a refrigerator, characterized in that the bypass flow path connected to the outlet pipe of the refrigerating chamber evaporator.

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