Refrigeration control method and device for air conditioner and air conditioner

Abstract

The present invention provides a refrigeration control method and device for an air conditioner, and the air conditioner. The air conditioner includes a bypass circuit and a solenoid valve arranged in the bypass circuit. When the mode is running, obtain the outdoor ambient temperature, the intake air temperature of the compressor, and the coil temperature of the evaporator; control the solenoid valve according to the outdoor ambient temperature, the intake air temperature, and the coil temperature to realize the bypass The conduction of the through loop, the refrigeration control method of the air conditioner described in the present invention, judges the operating status of the air conditioner by obtaining the outdoor ambient temperature, the intake air temperature of the compressor, and the coil temperature of the evaporator, and according to the outdoor environment Temperature, compressor intake temperature and evaporator coil temperature control solenoid valve is opened to conduct the bypass circuit, increase the return air temperature, ensure the reliability of the compressor, and then widen the lower limit temperature of the air conditioner to meet the low temperature of special places cooling needs.

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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