Variable frequency air conditioner oil return reliability improving system, method and device

Abstract

The invention provides a variable frequency air conditioner oil return reliability improving system, method and device, and relates to the technical field of air conditioners. The method comprises thesteps that a first frequency of a compressor is obtained, wherein the first frequency is the operation frequency after the compressor operates for a first duration; whether the first frequency meetsthe oil return preset condition or not is judged; and if yes, opening and closing of an oil return solenoid valve are controlled. The variable frequency air conditioner oil return reliability improving system, method and device are used for a variable frequency air conditioner, by judging the operation frequency of the variable frequency air conditioner, the opening and closing time of the solenoid valve is reasonably controlled, it is ensured that oil brought out of the compressor along with a refrigerant returns back to the compressor as fast as possible, and the oil return reliability of the variable frequency air conditioner is improved.

Description

technical field [0001] The present invention relates to the technical field of air conditioners, in particular to a system, method and device for improving the oil return reliability of frequency conversion air conditioners. Background technique [0002] When the inverter air conditioner is running, the refrigerant is compressed into a high-temperature and high-pressure gas in the compressor. When it is discharged from the compressor exhaust port, a part of the lubricating oil will be taken away. The lubricating oil will gradually layer and deposit with the circulation of the refrigerant. in the evaporator and condenser. The loss of lubricating oil will bring inconvenience to the operation of the air conditioner. On the one hand, the oil stored in the heat exchanger will affect the heating effect of the air conditioner; on the other hand, the lack of lubricating oil in the compressor will lead to poor lubrication of the compressor and increased wear , seriously affecting th...

AI Technical Summary

Problems solved by technology

At present, the oil return method used by the inverter air conditioner is to switch to the high-frequency and high-frequency forced oil return at regular intervals. It is impossible to monitor the oil volume of the compressor in real time, and it is impossible to carry out targeted oil return control according to the real-time status of the compressor. There is still the risk of poor lubrication or untimely oil return in a short period of time, which affects the service life of the compressor

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