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Method for controlling electronic expansion valve of air conditioner

An electronic expansion valve and air conditioner technology, which is applied in the direction of refrigerators, refrigeration components, refrigeration and liquefaction, etc., can solve the problems of inability to obtain compressor motor torque, motor trip, inconvenient after-sales service of air conditioners, etc., and achieve simplified after-sales service , The effect of preventing tripping phenomenon

Inactive Publication Date: 2009-07-29
DAEWOO ELECTRONICS CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This pre-operation requirement leads to serious inconvenience in the after-sales service of air conditioners
[0013] In addition, according to the traditional method, tripping (trip) phenomenon is likely to occur
That is, when the air conditioner stops momentarily due to a sudden power interruption and restarts its normal operation, since there is still a pressure difference, sufficient compressor motor torque cannot be obtained, which will cause the motor to trip

Method used

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  • Method for controlling electronic expansion valve of air conditioner
  • Method for controlling electronic expansion valve of air conditioner
  • Method for controlling electronic expansion valve of air conditioner

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Embodiment Construction

[0030] Hereinafter, various embodiments of the present invention will be described in detail with reference to the accompanying drawings.

[0031] As described below, unlike the conventional method (in the operation of the conventional method, the EEV is completely turned off in the initial stage of the start-up of the air conditioner, and then, the opening degree of the EEV is changed to a reference opening degree based on the indoor thermal load, etc.); the present invention controls the opening degree of the EEV in the air conditioner in the following manner: fully open the EEV of the air conditioner in response to power-on, fully close the EEV when the operation start signal is input, and then Adaptive control is performed based on the reference opening pulse frequency (reference opening degree) calculated by the load, etc. (ie, in a stepwise manner or gradually). The purpose of the present invention can be realized more simply by using this technical means.

[0032] fi...

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Abstract

A method for controlling an electronic expansion valve (EEV) in an air conditioner using a compressor includes the steps of: (a) opening the EEV completely when a power is applied to the air conditioner in stand-by mode; (b) closing the EEV completely when the air conditioner starts a cooling or a heating operation; (c) calculating an indoor heat load; (d) calculating a reference opening pulse frequency of the EEV; and (e) controlling in a stepwise manner an opening pulse frequency of the EEV based on the reference opening pulse frequency of the EEV. The opening pulse frequency of the EEV is controlled in a stepwise manner until it reaches the reference opening pulse frequency of the EEV.

Description

technical field [0001] In general, the present invention relates to air conditioners, and in particular, the present invention relates to a method of controlling an electronic expansion valve (EEV) of an air conditioner, which is suitable for controlling an electric expansion valve (EEV) installed between an outdoor heat exchanger and an indoor heat exchanger. The degree to which the EEV is opened in order to adjust the total amount of refrigerant to be circulated. Background technique [0002] As is well known in the art, a typical air conditioner has such figure 1 structure shown. [0003] refer to figure 1 , a typical air conditioner is roughly divided into an outdoor unit 110 and an indoor unit 120 . The outdoor unit 110 includes: a compressor 111 , a four-way valve 112 , an outdoor heat exchanger 113 , an electronic expansion valve (EEV) 114 , a storage 115 and an outdoor fan 116 . The indoor unit 120 includes an indoor heat exchanger 121 and an indoor fan 123 . ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F25B49/02
CPCF25B2500/26F25B2500/19F25B2500/06F25B2341/0652Y02B30/72F25B2313/02741F25B2700/2104F25B2700/2106F25B2600/2513F25B13/00F25B41/062Y02B30/70F25B41/347F25B49/02
Inventor 宋吉弘
Owner DAEWOO ELECTRONICS CO LTD
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