Air conditioner frosting control method

Abstract

The invention belongs to the technical field of air conditioners, and particularly relates to an air conditioner frosting control method. In order to ensure the uniformity of frosting of an air conditioner to improve the defrosting efficiency, an air conditioner defrosting control method is applied to an air conditioner provided with double fans on an outdoor unit. The air conditioner frosting control method comprises the following steps that the temperature t<upper> of the upper part of an outer coil pipe and the temperature t<lower> of the lower part of the outer coil pipe are detected in the heating operation process of the air conditioner; and under the condition that the t<upper> is greater than the dew point temperature and the t<lower> is greater than the dew point temperature, if the t<upper> is greater than the t<lower>, the rotational speed of the lower fan is increased by first preset number of revolutions, and the rotational speed of the upper fan is decreased by the firstpreset number of revolutions. According to the air conditioner frosting control method, the nonuniformity of temperature point of the outer coil pipe of an outdoor heat exchanger is balanced by controlling the wind speed size of different areas of the outer coil pipe, and then the uniformity of frosting is reasonably controlled, so that the frosting of the outdoor unit is more uniform, and uniformfrosting facilitates defrosting, namely, 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...

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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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