Air conditioner and its electronic expansion valve control method, control device and storage medium

Abstract

The invention discloses a method for controlling an electronic expansion valve. The method includes: when the opening quantity of the electronic expansion valve needs to be adjusted, acquiring the first opening degree of the currently opened electronic expansion valve, the current opening quantity and the target opening of the electronic expansion valve quantity; determine the target opening degree according to the first opening degree, the target opening quantity and the current opening quantity; after the opening quantity of the electronic expansion valve is adjusted, the opened electronic expansion valve is controlled to operate according to the target opening degree. The invention also discloses an electronic expansion valve control device, an air conditioner and a readable storage medium. The invention aims at reducing the flow difference before and after switching the opening quantity of parallel electronic expansion valves, realizing smooth switching and improving the stability of system operation.

Description

technical field [0001] The invention relates to the technical field of air conditioning, in particular to an electronic expansion valve control method, an electronic expansion valve control device, an air conditioner and a readable storage medium. Background technique [0002] In order to meet the heat exchange requirements of large-area indoor spaces such as shopping malls and warehouses, large-capacity indoor units are generally used to adjust the air in large-area indoor spaces. In order to improve control accuracy, parallel electronic expansion valves are generally used to simultaneously open the same opening to replace large-diameter electronic expansion valves to achieve large flow control for large-capacity indoor units. Among them, it is necessary to increase or decrease the number of electronic expansion valves to be opened according to different heat exchange demands, so as to adjust the flow rate of the air conditioning system. [0003] However, when the number o...

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Problems solved by technology

[0003] However, when the number of open electronic expansion valves connected in parallel needs to be increased or decreased, no matter what the opening degree of the currently opened electronic expansion valve is, the number of electronic expansion valves is controlled to switch and then run according to the fixed set opening degree. It is easy to cause a large flow difference before and after switching the number of electronic expansion valves, which will affect the stability of the system operation

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