Air conditioner control method, control device and air conditioner

Abstract

The invention discloses an air conditioner control method, a control device and an air conditioner. The method comprises the steps of: in the heating operation process of the air conditioner, at least when the air conditioner meets a preset frosting condition, starting up a pressure regulating bypass branch; and when the pressure regulating bypass branch is started up, opening a subcooler bypass valve in a refrigerant circulating system, increasing a target high pressure of the system, and controlling a compressor according to the increased target high pressure of the system. The control device comprises corresponding structural units for implementing the control method; and the air conditioner comprises a memory, a processor and a computer program stored in the memory, and the processor executes the computer program to implement the air conditioner control method. By the adoption of the air conditioner control method, the control device and the air conditioner, frosting of an outdoor unit heat exchanger is reduced or eliminated when the heating operation is not stopped, and the operation performance of the air conditioner is improved.

Description

technical field [0001] The invention belongs to the technical field of air treatment, and in particular relates to air conditioner technology, and more specifically relates to an air conditioner control method, a control device and an air conditioner. Background technique [0002] When the air conditioner is running in heating mode, the surface of the outdoor heat exchanger is prone to frost. After frosting, the surface of the heat exchanger is blocked, resulting in a decrease in the heat transfer coefficient, an increase in air flow resistance, and a decrease in the heat transfer efficiency of the outdoor heat exchanger, which in turn affects the comfort of the indoor temperature and reduces the heating energy efficiency ratio of the system. Therefore, the existing air conditioner usually performs defrosting treatment after the outdoor unit is frosted. [0003] At present, most air conditioners use the reverse defrosting method. When it is judged that the air conditioner h...

AI Technical Summary

Problems solved by technology

[0004] In the prior art, the heating operation will stop during defrosting, the indoor unit will stop sending hot air, the indoor temperature will drop significantly, and the difference with the indoor comfort temperature will be large, affecting the comfort of the indoor temperature

On the other hand, in order to reduce the indoor temperature drop caused by the frequent operation of the defrosting process, the existing technology is to switch to the defrosting process after a lot of frosting, often because the frost layer is too thick and it is difficult to completely defrost or it takes a long time to defrost. Frost operation, if the defrosting is not complete, the heat exchange efficiency will be low, which will affect the heating energy efficiency ratio of the system; if the defrosting operation is long-term, the heating demand will be seriously affected, and the user comfort experience will be poor

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