Air conditioner defrosting control method

Abstract

The invention belongs to the technical field of air conditioners, and particularly relates to an air conditioner defrosting control method to prevent excessive room temperature fluctuation during defrosting. The air conditioner defrosting control method comprises the following steps that during the heating operation process of an air conditioner, heating capacity of the air conditioner is calculated; the ratio of adjacent two times of heating capacity of the air conditioner is calculated based on the heating capacity; the attenuation degree of the ratio of the adjacent two times of heating capacity is calculated based on the ratio of adjacent two times of heating capacity; and whether the air conditioner is put into the defrosting mode is judged based on the attenuation degree. Whether theair conditioner is put into the defrosting mode is judged by using changes of the heating capacity of the air conditioner, and therefore influence on the indoor temperature can be reduced to the maximum extent during the defrosting process, and indoor temperature does not fluctuate greatly. Through the mode of judging whether the air conditioner is put into the defrosting mode based on the changes of the heating capacity, the defrosting times can be further reduced, defrosting frequency can be lowered, and use comfort of a user can be guaranteed meanwhile.

Description

technical field [0001] The invention belongs to the technical field of air conditioners, and in particular relates to an air conditioner defrosting control method. Background technique [0002] As a device that can adjust the indoor ambient temperature, the air conditioner works on the principle that the indoor ambient temperature is reduced or increased by the refrigerant passing through the circulation pipeline through high-pressure / low-pressure / gas / liquid state transitions, that is, from From the perspective of the indoor unit, the air conditioner is in cooling or heating mode. When the air conditioner is in heating operation, if the temperature of the outdoor coil is too low under certain humidity conditions, it will cause frosting, and the frosting of the outdoor coil will reduce the heat exchange efficiency of the outdoor heat exchanger and affect the cooling performance of the air conditioner. The thermal effect reduces the comfort of the indoor environment and affec...

AI Technical Summary

Problems solved by technology

Existing air conditioners generally use the running time + outdoor coil temperature to judge whether to enter defrosting, but this method cannot directly reflect the attenuation degree of the actual heating capacity of the air conditioner, that is, under different working conditions, the same outer coil The attenuation of heating capacity corresponding to the degree of tube temperature attenuation is different, and what really affects users is the attenuation of heating capacity

Images