Air conditioner and its defrosting method and device

Abstract

The present application discloses an air conditioner and its defrosting method and device, wherein, the air conditioner operates in the heating mode, and the defrosting method includes the following steps: according to the preset first time interval, obtain the current The first output power and the first output current of the air conditioner; according to the first output power and the first output current, obtain the current outdoor static pressure value of the air conditioner; obtain the current speed of the outdoor motor inside the air conditioner; obtain the current speed matching the current speed Standard outdoor air outlet static pressure value; according to the outdoor air outlet static pressure value and the standard outdoor air outlet static pressure value, judge whether to defrost the air conditioner, and control the air conditioner to enter the defrost mode when it is judged that defrosting is required. According to the defrosting method of the present application, it is possible to accurately judge whether the outdoor unit is frosted, and accurately defrost according to the judgment result, thereby not only ensuring stable operation of the system, but also saving energy and improving user experience.

Description

technical field [0001] The present application relates to the technical field of frosting detection of heat exchangers, in particular to a frosting detection device for heat exchangers, an air conditioning system and a frosting detection method for heat exchangers. Background technique [0002] When the air conditioning system is heating, the outdoor unit will frost due to the low ambient temperature and high humidity. Once the outdoor unit is frosted, its heat exchange capacity will drop sharply, thus affecting the operation of the entire system. [0003] In related technologies, it is possible to judge whether the heat exchanger is frosted according to the temperature of the coil of the outdoor unit, and then defrost the outdoor unit to make the system run stably. However, in this manner, it is impossible to accurately know whether the outdoor unit is frosted, and it is impossible to accurately defrost. If the outdoor unit is defrosted without frosting, it will easily cau...

AI Technical Summary

Problems solved by technology

[0004] The embodiment of the present application solves the problem that the outdoor unit cannot be accurately defrosted in the prior art by providing an air conditioner and its defrosting method and device. When the air conditioner is in heating operation, it can accurately determine whether the outdoor unit Whether there is frost, and accurately defrost according to the judgment result, so as not only to ensure the stable operation of the system, but also to save energy and improve the user experience

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