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. In order to prevent large fluctuation of the temperature ina room during defrosting, the air conditioner defrosting control method comprises the steps that the maximum heating capacity Qmax of an air conditioner is calculated after the air conditioner beginsto heat; after the air conditioner reaches the maximum heating capacity, the real-time heating capacity Q of the air conditioner is calculated; and Q and Qmax are compared, and whether the air conditioner is made to enter into the defrosting mode is judged according to the comparison result, wherein Qmax=(Q1+Q2+...Qm) / m, Qm is the heating capacity, obtained every other first preset time, of the air conditioner after the air conditioner begins to heat until the heating capacity of the air conditioner is not increased, and when the Q(m-1)-Qm>the set value, the Qm is stopped to be calculated, andQ(m-1) is the heating capacity, obtained the last time of Qm, of the air conditioner. Whether the air conditioner enters into the defrosting mode or not is judged according to the changes of the heating capacity, the influence on the indoor temperature in the defrosting process is reduced to the greatest extent, and the indoor temperature does not greatly fluctuate.

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

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