Defrosting frequency control method and air conditioning system

Abstract

The invention provides a defrosting frequency control method and an air conditioning system, and belongs to the technical field of air conditioners. The method comprises the following steps that a defrosting mode is started, the compressor operation frequency F0 in the heating attenuation period is determined, and initial correction of the compressor operation frequency correction F in the initial defrosting stage is determined; the operation frequency F initial stage of the defrosting initial stage compressor is corrected and determined according to F0 and F initial stage; determining the medium-term correction of the operation frequency correction quantity F of the compressor in the medium-term defrosting; the operation frequency F middle stage of the defrosting middle stage compressor is corrected and determined according to the F initial stage and the F middle stage; determining the last-stage correction of the compressor operation frequency correction F in the last stage of defrosting; and according to the F0 and Flast phase correction, the running frequency Flast phase of the compressor at the defrosting last phase is determined. According to the method, the operation frequency of the compressor in the defrosting mode can be adjusted in stages, so that on the premise that the defrosting effect is guaranteed, the indoor high comfort is kept, and the good use experience is provided for a user.

Description

technical field [0001] The invention relates to the technical field of air conditioning, in particular to a defrosting frequency control method and an air conditioning system. Background technique [0002] When the air conditioning system runs in heating mode for a long time in a low-temperature environment in winter, the surface of the outdoor heat exchanger is prone to frost, and the frost layer will affect the heat exchange effect of the air conditioner. The existing common way to solve the frosting of the air conditioner is: when the air conditioner enters the defrosting mode, the air conditioner switches from heating operation to cooling operation, and the frequency of the compressor will be adjusted to the target defrosting frequency. At the same time, other components are controlled cooperatively, so that the higher temperature refrigerant flows through the outdoor heat exchanger, increasing the surface temperature of the heat exchanger, melting the frost layer, and r...

AI Technical Summary

Problems solved by technology

The defrosting frequency of the compressor is very important to the defrosting process. The defrosting frequency of the existing air conditioners is mostly fixed, which easily leads to the following situations in the defrosting process: 1) The defrosting frequency setting 2) If the defrosting frequency is set high, the indoor temperature will drop significantly in a short period of time, which will affect the comfort of the room.

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