Frosting control method of air conditioner

Abstract

The invention belongs to the technical field of air conditioners, and particularly relates to a frosting control method of an air conditioner. In order to guarantee frosting uniformity of the air conditioner to improve defrosting efficiency, the defrosting control method of the air conditioner is provided for the air conditioner provided with double fans on an outdoor unit. The method comprises steps as follows: detecting a temperature t(upper) of the upper part of an outer coil pipe and a temperature t(lower) of the lower part of the outer coil pipe in a heating operation process of the air conditioner; detecting current I(upper) of an upper fan and current I(lower) of a lower fan under the conditions that t(upper) is lower than or equal to a dew point temperature and t(lower) is lower than or equal to the dew point temperature; controlling the revolution speed of the lower fan to be increased by first preset number of revolution if I(upper) is larger than I(lower); controlling the revolution speed of the upper fan to be increased by first preset number of revolution if I(upper) is smaller than I(lower); and controlling revolution speeds of the upper fan and the lower fan to be equal if I(upper) is equal to I(lower). According to the method, frosting uniformity can be controlled reasonably, frosting of the outdoor unit is more uniform, defrosting is facilitated by the aid of uniform frosting, and the defrosting efficiency is improved.

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...

AI Technical Summary

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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