Control method of air conditioner, control device of air conditioner and air conditioner

Abstract

The invention provides a control method of an air conditioner, a control device of the air conditioner and the air conditioner. The air conditioner comprises an outdoor heat exchanger. The outdoor heat exchanger comprises a coiler, wherein a heating element is arranged in the coiler. The control method of the air conditioner comprises the steps that the temperature of the coiler is detected once every preset time interval a, the temperature obtained during the ith detection is recorded as T, and when i is larger than b, the heating element is controlled to switched on or off according to the difference value between T<i+b>-T and the Ti-T<i-b>, wherein the unit of the preset time interval a is minute, a is a positive number, the initial value of i is 1, i is an integer larger than or equal to 1, and b is a natural number larger than or equal to 2. According to the scheme, the coiler can be preheated before defrosting through a heating assembly, so that frosting is avoided, and the defrosting speed is increased in the defrosting process; and after defrosting of the air conditioner is ended, the coiler continues being heated so that thawed ice water can be completely discharged, and the possibility that the ice water is frosted again is reduced.

Description

technical field [0001] The present invention relates to the field of household appliances, and more specifically, to an air conditioner control method, an air conditioner control device, and the air conditioner. Background technique [0002] At present, when the air conditioner is in heating mode, especially when it is used in an environment with low outdoor temperature in winter, the temperature of its coil is lower than the temperature of the external environment, so the water vapor in the external environment will condense on the outdoor heat exchanger And frost formation, especially when the humidity of the outdoor air is relatively high, the frosting problem of the outdoor heat exchanger will be more serious, and the frosting will reduce the heat exchange air volume of the outdoor heat exchanger, resulting in the failure of the outdoor heat exchanger. The heat exchange effect becomes poor, affecting the heat exchange performance of the entire air conditioner. In order ...

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Problems solved by technology

[0002] At present, when the air conditioner is in heating mode, especially when it is used in an environment with low outdoor temperature in winter, the temperature of its coil is lower than the temperature of the external environment, so the water vapor in the external environment will condense on the outdoor heat exchanger And frost formation, especially when the humidity of the outdoor air is relatively high, the frosting problem of the outdoor heat exchanger will be more serious, and the frosting will reduce the heat exchange air volume of the outdoor heat exchanger, resulting in the failure of the outdoor heat exchanger. The heat transfer effect becomes poor, affecting the heat transfer performance of the entire air conditioner

In order to ensure the heating effect, on the one hand, it is necessary to minimize frosting, on the other hand, it is necessary to defrost the outdoor heat exchanger, and at the same time speed up the defrosting speed, so as to drain the ice water on the chassis of the outdoor unit of the air conditioner. At present, the more common method is to use the four-way valve of the air conditioner to switch the direction of the air conditioner from the heating mode to the cooling mode, so that the high-temperature and high-pressure refrigerant discharged from the compressor enters the outdoor heat exchanger and melts the outdoor heat exchanger. The frost on the air conditioner, the cycle of this traditional defrosting method is relatively long, which seriously affects the heating effect and stability of the air conditioner

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