Air conditioner and its control method

Abstract

The invention discloses an air conditioner and a control method thereof. The air conditioner includes: a compressor, a reversing assembly, an indoor heat exchanger and an outdoor heat exchanger. The compressor has an exhaust port and an air return port; the reversing assembly has a first valve port to a fourth valve port, the first valve port communicates with the exhaust port, and the fourth valve port communicates with the return air port; the first valve port of the indoor heat exchanger The second end of the indoor heat exchanger is connected to the second end of the indoor heat exchanger with a throttling assembly that has the function of throttling and reducing pressure and has an adjustable opening; the outdoor heat exchanger includes multiple heat exchange parts, and each heat exchange part The first end of each heat exchange part is connected to the third valve port, the second end of each heat exchange part is connected to the throttling assembly, and the two ends of at least one heat exchange part are respectively connected in series with control valves for controlling the on-off of the refrigerant flow path. According to the air conditioner of the present invention, the low-temperature refrigeration of the air conditioner can be realized, thereby avoiding the freezing of the indoor unit and liquid return of the compressor caused by the low temperature of the refrigerant.

Description

technical field [0001] The invention relates to the technical field of temperature adjustment equipment, in particular to an air conditioner and a control method thereof. Background technique [0002] In the existing frequency conversion air conditioner control system, the operation mode of the air conditioner is to adjust the frequency of the compressor based on the set temperature and the current indoor ambient temperature as data. If the difference between the indoor ambient temperature and the set temperature is large, the compressor will run at high frequency, and if the difference between the indoor ambient temperature and the set temperature is small, the compressor will run at low frequency. And when the outdoor ambient temperature is low, if the room still needs to cool at this time, the air conditioner will be in a higher frequency state when it operates according to the existing control mode, because the outdoor heat exchanger is too effective, it is easier to cau...

AI Technical Summary

Problems solved by technology

And when the outdoor ambient temperature is low, if the room still needs to cool at this time, the air conditioner will be in a higher frequency state when it operates according to the existing control mode, because the outdoor heat exchanger is too effective, it is easier to cause Indoor unit icing, compressor liquid return, etc.

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