Initial opening degree control method and device for electronic expansion valve

Abstract

The invention discloses an initial opening degree control method for an electronic expansion valve. The method includes the steps that after an air-conditioner is powered up for operation, the electronic expansion valve is controlled to be opened at first at a set opening degree, then reset and afterwards opened again; when the electronic expansion valve is opened again to a preset first opening degree, the opening degree of the electronic expansion valve is kept to be the first opening degree, and then the initial opening degree of the electronic expansion valve in the current environment is calculated according to the acquired compressor capacity, compressor operation frequency, environment temperature and air-conditioner power; and the electronic expansion valve is controlled to be opened at the initial opening degree. The invention further discloses an initial opening degree control device for the electronic expansion valve. By means of the initial opening degree control method and device for the electronic expansion valve, an appropriate initial opening degree can be obtained through self-adaptation calculation depending on the operation environment of the powered-on air-conditioner so as to approach the optimal opening degree, and therefore the air-conditioner can achieve the best heat transfer effect more quickly.

Description

technical field [0001] The invention relates to the field of air conditioners, in particular to a method and device for controlling the initial opening of an electronic expansion valve. Background technique [0002] In an air conditioner control system that supports electronic expansion valve control, after the electronic expansion valve is started and initialized, the opening of the electronic expansion valve will be set at a predetermined initial opening. At present, the initial opening of the electronic expansion valve is often a preset fixed value. However, the operating environment of the air conditioner is often different after each startup. When the operating environment of the air conditioner is different, the opening of the electronic expansion valve needs to be Adjust according to changes in the operating environment to achieve the optimal opening, so that the air conditioner can achieve the best heat exchange effect, but it takes a period of time to adjust from th...

AI Technical Summary

Problems solved by technology

At present, the initial opening of the electronic expansion valve is often a preset fixed value. However, the operating environment of the air conditioner is often different after each startup. When the operating environment of the air conditioner is different, the opening of the electronic expansion valve needs to be Adjust according to changes in the operating environment to achieve the optimal opening, so that the air conditioner can achieve the best heat exchange effect, but it takes a period of time to adjust from the preset fixed initial opening to the optimal opening , which will affect the heat exchange effect of the air conditioner

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