Method and device for controlling air conditioner

Abstract

The invention discloses a method and a device for controlling an air conditioner. The method for controlling the air conditioner comprises the following steps of controlling a compressor of the air conditioner to start to work in a heating mode; obtaining the working frequency of the compressor, the temperature of an indoor heat exchanger of the air conditioner and the indoor temperature after the compressor works for a first preset time; judging whether a throttling component of the air conditioner is blocked or not according to the working frequency of the compressor, the temperature of the indoor heat exchanger and the indoor temperature; firstly controlling the compressor to stop working if the throttling component is judged to be blocked, and then controlling the air conditioner to work in a refrigerating mode to defrost. According to the method disclosed by the invention, the throttling component in the air conditioner can be prevented from being blocked by low-temperature oil by ceaselessly switching the refrigerating mode and the heating mode, the temperature of the bottom part of the compressor can be reduced, the using comfort of the air conditioner can be increased, the service lifes of the compressor and the air conditioner are ensured, and reference bases are also provided for researching novel compressor oil for being well matched with a novel refrigerant in future.

Description

technical field [0001] The invention relates to the technical field of household appliances, in particular to an air conditioner control method and an air conditioner control device. Background technique [0002] Most of the R410a refrigerants are used in the field of air-conditioning and refrigeration technology, but due to the high GWP (Global Warming Potential) value of R410a refrigerants, the current global greenhouse effect is becoming more and more serious, and countries around the world are paying more and more attention to global climate change. Under this circumstance, R410a refrigerant will be phased out gradually. Therefore, at present, we are more focused on researching low-GWP refrigerants represented by R32 and R290. Among them, based on safety considerations, the charging amount of R290 refrigerant is relatively small, and the pressure of an air conditioner using R290 refrigerant is much lower than that of an air conditioner using R410a refrigerant. [0003]...

AI Technical Summary

Problems solved by technology

At this time, since the viscosity of the engine oil is relatively high, and the pressure of the R290 air conditioner is lower than that of the R410a air conditioner, the pressure difference between the two ends of the throttling part cannot be established in time after the four-way valve is reversed, so the throttling part is easily damaged. The low-temperature engine oil is clogged, causing the R290 refrigerant to fail to participate in the cycle, resulting in the compressor idling, the capacity and power drop, the air conditioner lacks oil and fluorine, and the compressor motor overheats after long-term operation, which greatly reduces the compressor and air conditioner. The service life affects the user experience

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