Air conditioner system and defrosting control method and device thereof

Abstract

The invention discloses an air conditioner system and a defrosting control method and device thereof. The defrosting control method comprises the following steps that when the air conditioner system is defrosted each time, the defrosting exiting time determined in the previous time of defrosting is obtained; the air conditioner system is controlled to be defrosted according to the defrosting exiting time determined in the previous time of defrosting; in the defrosting process of the air conditioner system, the temperature of the outdoor environment is obtained, and the temperature of an outletof an outdoor heat exchanger is obtained; the temperature of the outdoor environment and the temperature of the outlet of the outdoor heat exchanger are judged; and if the temperature of the outlet of the outdoor heat exchanger is smaller than the first preset temperature for the preset time and the temperature of the outdoor environment is smaller than the second preset temperature, the forced defrosting time is obtained to serve as the defrosting exiting time of the next time of defrosting of the air conditioner system and stored. Accordingly, the defrosting exiting time can be adjusted according to the temperature of the outdoor environment, the temperature of the outlet of the heat exchanger and the lasting time of the temperature of the outdoor environment and the temperature of theoutlet of the heat exchanger, and the defrosting effect is guaranteed while the heat exchange effect is guaranteed.

Description

technical field [0001] The invention relates to the technical field of air conditioning, in particular to a defrosting control method for an air conditioning system, a defrosting control device for the air conditioning system, and an air conditioning system with the defrosting control device. Background technique [0002] In the air conditioning system, when the air conditioner has frost in the heating mode, it needs to switch to the cooling mode. At this time, the outdoor heat exchanger acts as a condenser to melt the frost layer. In related technologies, the defrosting process needs to set a forced exit time, so as to prevent the indoor unit from being unable to heat due to prolonged defrosting. Wherein, the exit time is generally fixed, so the length of the fixed time setting must meet the requirements of all operating environments. When the exit time is set too short, if it is affected by external rain and snow, the defrosting effect cannot be achieved, and the heat exc...

AI Technical Summary

Problems solved by technology

When the exit time is set too short, if it encounters external rain and snow weather, the defrosting cannot achieve the predetermined effect, and the heat exchanger cannot completely melt the surface frost layer

When the exit time is set too long, if the frost layer is not thick in the low temperature and low humidity environment, the defrosting can be completed in a short time, but the system parameters are difficult to meet the exit conditions, and the internal unit will fail due to the long defrosting execution time. Unable to heat, the indoor heating effect is affected

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