Air conditioner and its control method and control system

Abstract

The invention discloses an air conditioner, a control method and a control system thereof. Wherein, the method includes: during the heating operation of the air conditioner, detecting the temperature of the indoor evaporator and the temperature of the compressor, judging whether the air conditioner satisfies the defrosting condition, and if yes, controlling the air conditioner to enter the defrosting mode , and judge whether the temperature difference between the temperature of the compressor and the temperature of the indoor evaporator is greater than the preset temperature, if the temperature difference is greater than the preset temperature, the defrosting operation will be performed immediately, if the temperature difference is less than or equal to the preset temperature, then adjust the air conditioner Operating parameters to increase the temperature difference, and when the temperature difference is greater than the preset temperature, the defrosting operation will be delayed for a preset time. The method of the embodiment of the present invention can ensure the normal operation of the defrosting process of the air conditioner, thereby improving the defrosting efficiency.

Description

technical field [0001] The invention relates to the field of air conditioner control, in particular to an air conditioner, a control method and a control system thereof. Background technique [0002] At present, in the field of air-conditioning, when selecting an air-conditioning refrigerant, it is necessary to consider its impact on the atmospheric ozone layer and global warming. With the development of industrial technology, some new environmentally friendly refrigerants such as R290 (propane), R1270 (propylene), etc., have gradually become long-term alternatives to refrigerants R410A and R22 due to their ozone layer destruction coefficient of 0, small greenhouse coefficient, and excellent thermal performance. ideal refrigerants. However, the molecular weight of this kind of environmentally friendly refrigerant is very small (for example, the molecular weight of R290 is only 44), so the charging amount is small, and because of its very good compatibility with mineral oil,...

AI Technical Summary

Problems solved by technology

However, the molecular weight of this kind of environmentally friendly refrigerant is very small (for example, the molecular weight of R290 is only 44), so the charging amount is small, and because of its very good compatibility with mineral oil, the output power sometimes appears during the defrosting process of the air conditioner. too low, causing the system not to work properly

Images