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Electronic expansion valve opening degree control method and system for preventing frosting deterioration of air conditioner

A technology of electronic expansion valve and control method, applied in refrigerators, refrigeration components, refrigeration and liquefaction, etc., can solve the problems of deterioration of frosting, closing down the electronic expansion valve, etc., to prevent deterioration of frosting, slow down the decay speed, improve The effect of comfort

Inactive Publication Date: 2016-10-05
QINGDAO HAIER AIR CONDITIONER GENERAL CORP LTD
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AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide an electronic expansion valve opening control method to prevent frosting and deterioration of the air conditioner, which solves the problem that the existing exhaust control valve continues to close the electronic expansion valve when the outdoor heat exchanger of the air conditioner is frosted, resulting in condensation. Technical problems exacerbated by frost

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  • Electronic expansion valve opening degree control method and system for preventing frosting deterioration of air conditioner
  • Electronic expansion valve opening degree control method and system for preventing frosting deterioration of air conditioner
  • Electronic expansion valve opening degree control method and system for preventing frosting deterioration of air conditioner

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Embodiment Construction

[0021] Specific embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0022] When the air conditioner is in heating operation, if the outdoor heat exchanger is frosted, the discharge temperature of the compressor will drop. When the discharge temperature of the compressor is lower than the target discharge temperature, the electronic expansion valve will be closed to maintain the target discharge temperature. Air temperature, the existing technology will further reduce the opening of the electronic expansion valve, so that the low-pressure side flow rate decreases, resulting in lower low pressure, lower surface temperature of the heat exchanger, and more serious frosting, resulting in rapid attenuation of the air-conditioning heating capacity. By controlling the opening degree of the electronic expansion valve, the present invention slows down the attenuation speed of the heating heat of the air conditioner and i...

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Abstract

The invention relates to an electronic expansion valve opening degree control method and system for preventing frosting deterioration of an air conditioner. According to the control method, if T<d> is smaller than T<d target>, an electronic expansion valve is closed; if T<d> is larger than T<d target>, the electronic expansion valve is opened; if T<d> is equal to T<d target>, the electronic expansion valve is forbidden to be operated; and when it is detected that T<d> is equal to T<d target> within continuous time t<1>, whether an outdoor heat exchanger begins to frost or not is detected, and if yes, closing operation on the electronic expansion valve is forbidden. The electronic expansion valve opening degree control method suitable for the electronic expansion valve under the frosting condition is made according to the temperature change rules after the outdoor heat exchanger of the air conditioner frosts, frosting deterioration of the air conditioner under the condition can be effectively prevented, the rate of decay of the heating amount of the air conditioner is decreased, and the comfort performance of the air conditioner is improved.

Description

technical field [0001] The invention belongs to the technical field of opening degree control of an electronic expansion valve for preventing frosting deterioration of an air conditioner, and in particular relates to a method and system for controlling the opening degree of an electronic expansion valve for preventing frosting deterioration of an air conditioner. Background technique [0002] At present, the inverter air conditioner generally uses the target exhaust temperature as the control parameter to control the opening of the electronic expansion valve. The specific control method is: the temperature difference between the indoor ambient temperature and the set temperature, the wind gear of the indoor unit, and the outdoor ambient temperature determine the temperature of the compressor. The target frequency is the target frequency, and then the target frequency corresponds to the corresponding compressor target discharge temperature, so that the opening of the electroni...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F25B49/02
Inventor 姚兴
Owner QINGDAO HAIER AIR CONDITIONER GENERAL CORP LTD
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