Refrigeration control method and device of air conditioner and air conditioner

Abstract

The invention provides a refrigeration control method and device of an air conditioner and the air conditioner. The air conditioner comprises bypass loop and a solenoid valve arranged on the bypass loop. The method comprises the following steps that when the air conditioner runs in a normal refrigeration mode or a dehumidification mode, the outdoor environment temperature, the air inlet temperature of a compressor and the coiled pipe temperature of an evaporator are acquired; and according to the outdoor environment temperature, the air inlet temperature and the coiled pipe temperature, the solenoid valve is controlled so as to achieve breakover of the bypass loop. According to the refrigeration control method of the air conditioner, the running condition of the air conditioner is judged according to the outdoor environment temperature, the air inlet temperature of the compressor and the coiled pipe temperature of the evaporator, the solenoid valve is controlled according to the outdoor environment temperature, the air inlet temperature of the compressor and the coiled pipe temperature of the evaporator so as to achieve breakover of the bypass loop, the air return temperature is improved, compressor reliability is guaranteed, the lower limit temperature of air conditioner refrigeration is widened, and the low-temperature refrigeration requirements of special occasions is met.

Description

technical field [0001] The present invention relates to the technical field of air conditioners, in particular to a refrigeration control method and device for an air conditioner and an air conditioner. Background technique [0002] At present, the application range of frequency conversion air conditioners is becoming wider and wider. In the existing technology, for special places such as computer rooms, forging workshops, communication base stations, bars, etc. A certain cooling effect, the lower limit of low-temperature cooling of existing inverter air conditioners is generally 5°C, below this lower limit of cooling due to the low pressure of the return air, it will cause poor liquid and oil return, which will affect the reliability of the compressor. Contents of the invention [0003] In view of this, the present invention aims to provide a refrigeration control method and device for an air conditioner, and an air conditioner, in order to solve at least one aspect of th...

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Problems solved by technology

[0002] At present, the application range of frequency conversion air conditioners is becoming wider and wider. In the existing technology, for special places such as computer rooms, forging workshops, communication base stations, bars, etc. Certain refrigeration effect, the lower limit of low-temperature refrigeration of the existing inverter air conditioner is generally 5°C, the lower limit of the refrigeration temperature is lower than this, because the return air pressure is too low, it will cause poor liquid and oil return, which will affect the reliability of the compressor

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