Control method and device for air conditioner electronic expansion valve

Abstract

The invention relates to a control method and device for an air conditioner electronic expansion valve. When an air conditioner runs, the aperture information of the electronic expansion valve is stored in real time, and therefore when the air conditioner is shut down, the current aperture of the electronic expansion valve is kept unchanged under the normal shutdown situation and the abnormal shutdown situation; in this way, when starting is conducted again, the current position of the electronic expansion valve when the electronic expansion valve is shut down last time can be read, the electronic expansion valve continues to be adjusted from the current position, and over-step reset is not needed; and the damage to the electronic expansion valve due to over-step reset is avoided, the adjusting time on the electronic expansion valve during starting can be shortened as well, and refrigerating and heating can be more rapidly conducted.

Description

technical field [0001] The invention belongs to the technical field of air conditioners, and in particular relates to an air conditioner electronic expansion valve control method and device. Background technique [0002] The electronic expansion valve is an important device in the air conditioning and refrigeration system. The control method of the existing air-conditioning electronic expansion valve when shutting down and starting up is as follows: [0003] 1. The last shutdown of the air conditioner was a normal shutdown state. In order to ensure the accuracy of the electronic expansion valve opening adjustment, it is necessary to perform over-step reset adjustments when shutting down and starting up. When shutting down, control the electronic expansion valve to adjust from the current opening to the fully open position, adjust to the fully closed position after a period of time, and then adjust to the fully open position. The number of reset steps from the fully open pos...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a method for controlling the electronic expansion valve of an air conditioner, which solves the technical problem that the electronic expansion valve of the existing air conditioner is overstepped and resets to affect the cooling and heating speed of the air conditioner, resulting in damage to the electronic expansion valve and unable to operate normally.

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