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Refrigerator

a technology of refrigerator and heat exchange efficiency, which is applied in the field of refrigerators, can solve the problems of affecting the heat exchange efficiency of the evaporator, increasing the flow resistance, and high power consumption, and achieves the reduction of power consumption, the reduction of the flow resistance of refrigerant, and the quick removal of frost on the entire surface of the evaporator.

Inactive Publication Date: 2011-11-10
LG ELECTRONICS INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0014]According to the embodiments, since frost generated on an evaporator can be removed by high-temperature refrigerant discharged from a condenser without an additional defrost heater, power consumption can be reduced.
[0015]Also, since high-temperature refrigerant having passed through the compressor moves inside the evaporator, frost generated on an entire surface of the evaporator can be quickly removed.
[0016]In addition, a flow resistance of refrigerant can be minimized in a normal operation of a refrigerator by adjusting the size of an inlet and an outlet of a valve device.
[0017]Furthermore, since a portion of a bypass pipe is disposed adjacent to a tray for receiving water generated by defrosting, frost can be prevented from blocking an outlet formed in the tray.

Problems solved by technology

A large amount of frost greatly affects heat exchange efficiency of the evaporator and increases a flow resistance of air passing through the evaporator.
However, power should be additionally applied to the defrost heater, thereby leading to high power consumption.
Also, the heat of the defrost heater causes a temperature increase in the refrigerator.
In addition, because the defrost heater is provided at one portion of the evaporator and heats only the portion of the evaporator, it takes a long time to defrost.

Method used

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Examples

Experimental program
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Effect test

first embodiment

[0026]FIG. 1 is a schematic view of a refrigerant system of a refrigerator according to a

[0027]Referring to FIG. 1, a refrigerator 1 including a refrigerant system according to the first embodiment includes a compressor 10, a condenser 20, an expansion valve 30, an evaporator 40, and a vapor-liquid separator 50. The compressor 10 compresses refrigerant to high temperature and pressure, and the condenser 20 condenses the compressed refrigerant. The expansion valve 30 expands the condensed refrigerant. The evaporator 40 evaporates the refrigerant expanded through the expansion valve 30. The vapor-liquid separator 50 is disposed between the evaporator 40 and the compressor 10 to separate the liquid refrigerant and the vapor refrigerant having passed through the evaporator 40.

[0028]In detail, the compressor 10 is connected with the condenser 20 through a first connecting pipe 61. The expansion pipe 30 is connected with the evaporator 40 through a second connecting pipe 62.

[0029]The firs...

second embodiment

[0051]FIG. 4 is a schematic view of a refrigerant system according to a

[0052]Since the second embodiment is the same as the first embodiment except the structure of a valve device, detailed description will be omitted herein.

[0053]Referring to FIG. 4, a valve device according to the second embodiment includes a first valve 110 and a second valve 120. The first valve 110 is provided in a first connecting pipe 61 that connects the compressor 10 with the condenser 20. The second valve 120 is provided in the bypass pipe 70.

[0054]In detail, the bypass pipe 70 diverges from the first connecting pipe 61. The first connecting pipe 61 may be divided into a compressor discharge-side pipe 61c and a condenser intake-side pipe 61d by the bypass pipe 70. The first valve 110 is provided in the condenser intake-side pipe 61d.

[0055]The first valve 110 is opened and the second valve 120 is closed in a normal operation of the refrigerator. In this case, high-temperature refrigerant discharged from th...

third embodiment

[0057]FIG. 5 is a schematic view of a refrigerant system according to a

[0058]Referring to FIG. 5, the refrigerant system according to the third embodiment includes a compressor 10, a condenser 20, a plurality of evaporators, expansion valves of the same number as the evaporators, and a plurality of bypass pipes. The bypass pipes allow refrigerant discharged from the compressor 10 to flow into the evaporators.

[0059]In detail, the evaporators include an evaporator 42 for a freezing compartment and an evaporator 44 for a refrigeration compartment. The expansion valves include a first expansion valve 32 for expanding refrigerant to flow into the evaporator 42 a second expansion valve 34 for expanding refrigerant to flow into the evaporator 44.

[0060]The bypass pipes include a first bypass pipe 72 and a second bypass pipe 74. The first bypass pipe 72 allows high-temperature refrigerant discharged from the compressor 10 to move toward an inlet of the evaporator 42. The second bypass pipe 7...

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PUM

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Abstract

A refrigerator is provided. The refrigerator includes a compressor, a condenser, an expansion valve, an evaporator, a bypass pipe, and a valve device. The condenser condenses refrigerant discharged from the compressor, and the expansion valve expands the refrigerant condensed in the condenser. The evaporator evaporates the refrigerant expanded in the expansion valve, and the bypass pipe allows the refrigerant discharged from the compressor to move toward an inlet of the evaporator. The valve device allows the refrigerant discharged from the compressor to selectively move toward the bypass pipe or the condenser. The valve device comprises an inlet, a first outlet, and a second outlet. The refrigerant discharged from the compressor flows into the inlet. The refrigerant is discharged toward the condenser through the first outlet, and is discharged toward the bypass pipe through the second outlet. The first outlet has a diameter larger than that of the second outlet.

Description

TECHNICAL FIELD[0001]The present disclosure relates to a refrigerator.BACKGROUND ART[0002]A refrigerator supplies cold air to a freezer compartment and a refrigeration compartment through a refrigerant system so as to store foods at a low temperature.[0003]The refrigerant system includes a compressor, a condenser, an expansion unit, and an evaporator. Air is cooled while passing through the evaporator, and then is supplied to the freezer compartment and the refrigeration compartment.[0004]Cold air, which has circulated inside the freezer compartment and the refrigeration compartment, moves to a heat exchange chamber including the evaporator through a predetermined path.[0005]Here, moisture included in the air circulating inside the refrigerator becomes frost on a surface of the evaporator.[0006]A large amount of frost greatly affects heat exchange efficiency of the evaporator and increases a flow resistance of air passing through the evaporator. Therefore, when frost of more than a ...

Claims

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Application Information

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IPC IPC(8): F25D11/02F25D21/14F25B1/00
CPCF25B5/02F25B47/022F25B2600/2501F25B2400/0411F25B2400/0403F25B1/00F25D19/00
Inventor PARK, YONG-JOOSHIN, JONG-MINCHOI, BONG-JUNLEE, SU-WONSHIN, GYU-WONLIM, SEOK-MIN
Owner LG ELECTRONICS INC
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