Defrosting control method and control system of air conditioner heating mode and air conditioner

Abstract

The invention belongs to the technical field of air conditioner defrosting control, and discloses a defrosting control method and control system of an air conditioner heating mode and the air conditioner. In the air conditioner normal heating mode, through the temperature difference or attenuation rate of medium temperature of an indoor heat exchanger, the outer pipe temperature attenuation rate,exhaust attenuation rate and compressor accumulation or continuous running time, whether the air conditioner enters a rapid defrosting mode or not is judged, and through the outer ring temperature andoutdoor unit heat exchanger middle temperature difference value or outer pipe temperature rising rate or heat exchanger inlet temperature or inlet temperature rise rate or heat exchanger outlet temperature or outlet temperature rise rate and time, whether the air conditioner quits from the rapid defrosting mode or not is judged; under the normal heating rapid defrosting mode, electric auxiliary heating is started, an inner fan is started or shut down, under a rapid defrosting mode, an outdoor unit is adjusted, and compressor frequency, an electronic expansion valve or an outer fan is adjusted. Cost is not increased, reversing operation is not needed, whole heating duration is prolonged, and the comfort degree of a user can be improved.

Description

technical field [0001] The invention belongs to the technical field of air conditioner defrosting control, and in particular relates to a defrosting control method, a control system, and an air conditioner in a heating mode of an air conditioner. Background technique [0002] At present, the closest existing technology: present air conditioners all adopt heat pump type air conditioners to provide heat for the room during the cold season. After the air conditioner has been running for a period of time, the heat exchanger of the outdoor unit will often frost, which will affect the heat exchange efficiency of the air conditioner. Defrost to solve this problem. The existing defrosting method is mainly to switch from the heating mode to the cooling mode when the air conditioner judges that the outdoor unit is frosted to a relatively thick degree, which seriously affects the indoor heating capacity, so that the high-temperature and high-pressure gas of the compressor directly ent...

AI Technical Summary

Problems solved by technology

[0005] (1) The defrosting control method and defrosting control device of the existing air conditioner affect the heat exchange capacity of the outdoor heat exchanger, which in turn affects the outlet air temperature of the indoor air conditioner and affects people's comfort

[0006] (2) The defrosting control method and defrosting control device of the existing air conditioner need to perform defrosting operation after the frost layer reaches a certain level, and the comfort will be worse during the defrosting process

Images