Defrosting control method for air conditioner

Abstract

The invention belongs to the technical field of air conditioners, and specifically relates to a defrosting control method for an air conditioner. In order to prevent excessive fluctuation of room temperature during defrosting, the invention provides the defrosting control method for the air conditioner, and the defrosting control method comprises the following steps of calculating the heating capacity of the air conditioner in the heating process of the air conditioner; calculating the ratio of two adjacent heating capacities of the air conditioner based on the heating capacity; and judging whether the air conditioner needs to enter the defrosting mode according to the ratio. According to the defrosting control method, whether the air conditioner needs to enter the defrosting mode is judged according to the change of the heating capacity of the air conditioner, so that the influence of the defrosting process on room temperature is reduced to the maximum extent, and indoor temperature does not fluctuate greatly. Moreover, through the method for judging whether to enter the defrosting mode according to the change of the heating capacity, the number of defrosting can be further reduced; and the defrosting frequency is reduced, and meanwhile the user comfort can be ensured.

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