Air Conditioner Frosting Control Method

Abstract

The invention belongs to the technical field of air conditioners, and in particular relates to a frosting control method for an air conditioner. In order to ensure the uniformity of frosting of the air conditioner to improve the defrosting efficiency, the air conditioner defrosting control method proposed by the present invention is aimed at an air conditioner with dual fans installed on the outdoor unit. The method includes the following steps: During the heating operation of the air conditioner, Detect the temperature of the outer coil; when the temperature of the outer coil is lower than the dew point temperature, detect the current I of the upper fan every preset time 上 and the current I of the lower fan 下 ;calculate ΔI=|I 上 -I 下 |; if ΔI>0.01A, and I 上 >I 下 , then increase the rotation speed of the upper fan by a first preset number of rotations. The invention balances the unevenness of the temperature points of the outer coil of the outdoor heat exchanger by controlling the wind speed in different areas of the outer coil, and then reasonably controls the uniformity of frosting, so that the frosting of the external unit is more uniform, and the frosting Uniformity is conducive to defrosting, that is, improving the defrosting efficiency.

Description

technical field [0001] The invention belongs to the technical field of air conditioners, and in particular relates to a frosting control method for an air conditioner. 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 a...

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Problems solved by technology

[0003] Since the frosting speed and thickness of the outdoor unit are affected by the temperature of the outer coil and the wind speed, and the shunt flow of the outdoor heat exchanger cannot be completely consistent, when the wind speed is the same, the temperature of the outer coil must be inhomogeneous. It will cause uneven frosting on the outer coil, which will affect the defrosting efficiency of the air conditioner.

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