Low-temperature refrigeration continuous operation control method and device, air conditioner and storage medium

Abstract

The invention provides a low-temperature refrigeration continuous operation control method and device, an air conditioner and a storage medium, and the method comprises the steps that in an air conditioner low-temperature refrigeration mode, the outdoor fan gear D is adjusted by dividing the high pressure Ph of a compressor, the outdoor fan gear D and the compressor pressure ratio gamma at most in sequence, and on the basis of a first triggering moment when D is equal to the lower limit of D, Ph is smaller than P4 and gamma is smaller than gamma1, linkage control over the outdoor fan gear D, an outdoor unit expansion valve and an indoor unit expansion valve is executed. Wherein P4 is a fourth preset high-pressure value, the lower limit of D is the lowest gear of the outdoor fan, and gamma1 is used for representing a first critical value of the lower limit of the pressure ratio. By means of the low-temperature refrigeration continuous operation control method and device, the air conditioner and the storage medium, even if the air conditioner operates in the refrigeration mode at the low environment temperature, the purpose of continuous and stable operation of the outdoor fan can be achieved.

Description

technical field [0001] The present invention relates to the technical field of air conditioning, and in particular, to a low-temperature refrigeration continuous operation control method, device, air conditioner, and storage medium. Background technique [0002] At present, when the air conditioner operates in the cooling mode at a lower ambient temperature, the outdoor fan will periodically start and stop in a reciprocating manner to ensure the effective operation of the air conditioner in the cooling mode. This is because in the low-temperature cooling scenario, the air-conditioning load demand is small and the outdoor heat exchanger is too large. When the compressor and outdoor fan are both reduced to the minimum operation, the actual cooling capacity will still exceed the load demand, and the outdoor fan can only be stopped. to turn down the cooling. However, after the outdoor fan is stopped, the outdoor heat exchanger cannot effectively exchange heat with the surroundi...

AI Technical Summary

Problems solved by technology

However, after the outdoor fan is stopped, the outdoor heat exchanger cannot effectively exchange heat with the surrounding air. As time goes by, the outdoor fan must be turned on to meet the load demand.

[0003] As a result, the outdoor fan will form a reciprocating start-stop operation, which will cause significant fluctuations in the operating temperature and operating noise of the air conditioner, affecting user comfort experience

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