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 the situation that the room temperature fluctuation is too large during defrosting, the air conditioner defrosting control method comprises the steps that after an air conditioner begins to run in a heating manner, the maximum heating capacity Qmax of the air conditioner is worked out; 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 needs to go into a defrosting pattern or not is judged according to a comparative effect, wherein Qmax=(Q1+Q2+...Qm) / m, Qm is the heating capacity, acquired every a first preset time, of the air conditioner after the heating capacity of the air conditioner is not increased any more from the heating beginning of the air conditioner, when Qm / Qm-1 is smaller than a set value, calculation of the value of Qm is stopped, and Qm-1 is the air conditioner heating capacity calculated last time of Qm. According to the air conditioner defrosting control method, whether theair conditioner needs to go into the defrosting pattern or not is judged according to the change of the heating capacity, and therefore the effect on the indoor temperature in the defrosting processis reduced to the maximum extent, and the indoor temperature cannot fluctuate greatly.

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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