Air conditioner and method for controlling electronic expansion valve of same

An electronic expansion valve, air conditioner technology, applied in heating and ventilation control systems, refrigerators, heating methods, etc., can solve problems such as compressor overheating

Inactive Publication Date: 2004-06-09
LG ELECTRONICS INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When the air conditioner is in heating mode, if the outdoor temperature is high, the heat is transferred to the outdoor heat exchanger which is in the outdoor air and acts as an evaporator, so after the refrigerant flows through the outdoor heat exchanger, the heat The temperature of the refrigerant in the exchanger and the temperature of the refrigerant entering the compressor are relatively high, causing the compressor to overheat

Method used

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  • Air conditioner and method for controlling electronic expansion valve of same
  • Air conditioner and method for controlling electronic expansion valve of same
  • Air conditioner and method for controlling electronic expansion valve of same

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Embodiment Construction

[0038] Preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings.

[0039] Such as figure 1 and 2 As shown, the air conditioner of the present invention includes an outdoor unit (A) installed outdoors, which compresses, condenses and expands refrigerant in cooling mode; an indoor unit (B) installed indoors, and the indoor unit It is connected to the outdoor unit (A) through refrigerant pipes to evaporate the refrigerant in cooling mode; and a microcomputer (C) that controls the operation of multiple compressors and controls the electronics of the outdoor unit (A) operation of the expansion valve.

[0040] Here, the outdoor unit (A) includes first and second compressors 2 and 4, an outdoor heat exchanger 6, an outdoor fan 6a, an electronic expansion valve 8, an oil separation unit 14 and connecting these components The refrigerant pipeline is provided with multiple check valves 2a and 4a. The indoor unit (B) i...

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PUM

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Abstract

The air conditioner comprises a plurality of compressors for compressing a refrigerant; a condenser for condensing the refrigerant; an electronic expansion valve for expanding the refrigerant; an evaporator for evaporating the refrigerant; a direction change valve for changing the flow direction of the refrigerant; a refrigerant pipe for connecting the compressors, the condenser, the electronic expansion valve, the evaporator and the direction change valve; and a microcomputer for controlling the operation of the air conditioner, wherein an opening degree of the electronic expansion valve is controlled so that a current degree of superheat coincides with a target degree of superheat set in consideration of the refrigerant compression capacity of operating compressor(s) and an outdoor temperature. The air conditioner prevents the refrigerant in a liquid state from being introduced into the compressor(s) and the compressor(s) from overheating, and rapidly eliminates the cooling or heating load, thus providing comfortableness to customers.

Description

technical field [0001] The present invention relates to an air conditioner for cooling or heating indoor air and a method of controlling an electronic expansion valve of the air conditioner. Background technique [0002] In general, an air conditioner is a device for cooling or heating indoor spaces such as living spaces, restaurants, offices, and the like. This air conditioner includes a compressor that compresses the refrigerant into a high-temperature and high-pressure gas state, a condenser that condenses the refrigerant passing through the compressor into a high-temperature and high-pressure liquid state, and a compressor that decompresses the refrigerant passing through the condenser. An expansion assembly in a low-temperature, low-pressure liquid state, and an evaporator that evaporates the refrigerant passing through the expansion assembly into a low-temperature, low-pressure gaseous state. The compressor, condenser, expansion assembly and evaporator are connected b...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F25B30/00F25B13/00F25B49/02
CPCF25B13/00F25B2700/2106F25B2600/2513F25B2313/0314F25B2700/21151F25B49/022F25B2500/19Y02B30/72F25B2341/0652F25B2313/0315F25B2400/0751F25B2313/005Y02B30/70F25B41/347F25B30/00
Inventor 李元熙金哲民黄尹提
Owner LG ELECTRONICS INC
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