Defrosting control method of air conditioner

Abstract

The invention belongs to the technical field of air conditioners, and provides a defrosting control method of an air conditioner. The problems that existing air conditioners can cause the temperatureto drop in a room during refrigeration defrosting, and frequent commutation of four-way valves can lower the service life of the four-way valves are solved. The defrosting control method includes thesteps that during heating operation of the air conditioner, whether the defrosting conditions are satisfied or not is judged, and the outdoor environment temperature is obtained, and according to judging results of the defrosting conditions and the outdoor environment temperature, the air conditioner is selectively made to enter a hot water defrosting mode or a refrigeration defrosting mode. According to the defrosting control method of the air conditioner, when the defrosting conditions are satisfied, the hot water defrosting mode or the refrigeration defrosting mode can be chosen to be adopted according to the outdoor environment temperature, instead of only adopting the refrigeration defrosting mode to defrost every time, thus the frequency of the air conditioner entering the refrigeration defrosting mode can be decreased, then the heating time of the air conditioner can be prolonged, and frequent commutation of a four-way valve can be avoided so that the service life of the four-way valve can be prolonged.

Description

technical field [0001] The invention belongs to the technical field of air conditioners, and specifically provides a defrosting control method for an air conditioner. Background technique [0002] An air conditioner is a device capable of cooling / heating a room. When the air conditioner is heating and running, the water vapor in the air will condense into frost crystals on the surface of the heat exchanger of the outdoor unit. Convective heat transfer will affect the heating effect of the air conditioner. At this time, it is necessary to defrost the heat exchanger of the outdoor unit. [0003] The defrosting method of existing air conditioners is mainly refrigeration defrosting, that is, through the four-way valve reversing, the refrigerant flows backwards, and the high-temperature refrigerant directly enters the heat exchanger of the outdoor unit for forced defrosting. However, changing the air conditioner from the heating mode to the cooling defrosting mode requires the ...

AI Technical Summary

Problems solved by technology

[0005] In order to solve the above problems in the prior art, that is, in order to solve the problem that the indoor temperature of the existing air conditioner will drop during refrigeration and defrosting, and the frequent reversing of the four-way valve will reduce the service life of the four-way valve, the present invention provides a A defrosting control method for an air conditioner, the defrosting control method comprising: when the air conditioner is in heating operation, judging whether the defrosting condition is met and obtaining the outdoor ambient temperature; according to the judging result of the defrosting condition and the outdoor ambient temperature, selectively make the air conditioner enter the hot water defrosting mode or the cooling defrosting mode

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