Oil return control method and air conditioner

Abstract

The invention provides an oil return control method and an air conditioner, and relates to the technical field of air conditioners. The oil return control method is applied to the air conditioner, andcomprises the steps that when a compressor reaches the oil return conditions, the compressor is controlled to operate according to an oil return frequency F1; when operating parameters of the compressor are greater than a parameter threshold value, the compressor is controlled to exit the oil return, wherein the oil return frequency F1 is determined according to an oil return frequency thresholdvalue F2, an oil return frequency abnormal base number F3 and an oil return abnormal exit time N. In this way, by recording the oil return abnormal exit time N, the compressor is controlled to operateaccording to the oil return frequency F1, when the operating parameters of the compressor are greater than the parameter threshold value, the compressor exits oil return normally, the high-pressure protection of the system is avoided, meanwhile a good oil return effect is achieved, the service life of the compressor is prolonged, and the refrigerating and heating effects of the air conditioner are improved.

Description

technical field [0001] The invention relates to the technical field of air conditioning, in particular to an oil return control method and an air conditioner. Background technique [0002] If the existing air-conditioning system is operated at low frequency for a long time, the oil carrying capacity will be poor, resulting in the situation that the oil cannot be recovered to the compressor. Therefore, the existing air-conditioning system needs to perform high-frequency oil return control. However, when the load of the air-conditioning system is high, the commonly used oil return control method cannot normally complete the high-frequency oil return process, which may lead to poor oil recovery effect, resulting in poor cooling and heating effects of the air-conditioning system. [0003] Therefore, designing an oil return control method that can achieve a good oil return effect and ensure the cooling and heating effects of the air conditioning system is an urgent technical prob...

AI Technical Summary

Problems solved by technology

[0004] The problem solved by the invention is that the commonly used oil return control method cannot normally complete the high-frequency oil return process, which may lead to poor oil recovery effect, resulting in poor cooling and heating effects of the air conditioning system

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