Air conditioner control method and device and air conditioner

Abstract

The invention discloses an air conditioner control method. The air conditioner control method comprises the steps that a compressor discharge pressure value of an air conditioner and the outdoor environment temperature are obtained during refrigerating operation of the air conditioner; when the compressor discharge pressure value is smaller than a first preset pressure value or the outdoor environment temperature is lower than a first preset temperature value, any one of a plurality of outdoor heat exchangers on an outdoor unit of the air conditioner is closed; a current compressor discharge pressure value and an indoor evaporator temperature of the air conditioner are obtained; and an electromagnetic valve of the air conditioner is controlled to be opened or closed according to the current compressor discharge pressure value and the indoor evaporator temperature so that the return air pressure of a compressor can be adjusted. The invention further discloses an air conditioner control device and the air conditioner. According to the air conditioner control method and device and the air conditioner, the discharge return air pressure of the compressor is adjusted by opening or closing the electromagnetic valve, and low-pressure protection of the compressor is achieved. Meanwhile, frequent starting and stopping of the compressor are reduced and low-temperature protection of an evaporator is achieved.

Description

technical field [0001] The present invention relates to the technical field of air conditioners, in particular to an air conditioner control method and device and the air conditioner. Background technique [0002] During the cooling operation of the air conditioner, the compressor may start and stop frequently in the low-temperature cooling mode, resulting in a decrease in the reliability of the compressor. In the prior art, the pressure control method is adopted for the cooling operation of the air conditioner under small load, and the four-way valve is used to control the on-off of one of the two heat exchangers to adapt to the state of low-load operation. In this method, refrigeration operation is still required in some ultra-low temperature environments, and it is difficult to make the system run smoothly. Therefore, low-temperature protection for the evaporator and low-pressure protection for the compressor will occur frequently, resulting in frequent start-up and stop ...

AI Technical Summary

Problems solved by technology

In this method, refrigeration operation is still required in some ultra-low temperature environments, and it is difficult to make the system run smoothly. Therefore, low-temperature protection for the evaporator and low-pressure protection for the compressor will occur frequently, resulting in frequent start-up and stop of the compressor, which affects the reliability of the compressor. Sex, and the cost of using four-way valve control is high, and the commutation noise is large

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