Control method for air conditioner, and air conditioner

Abstract

The invention belongs to the technical field of air conditioners, and particularly provides a control method for an air conditioner, and the air conditioner. The air conditioner comprises an indoor unit and an outdoor unit, and a refrigerant heating component is arranged on a heat exchanger of the outdoor unit; the control method comprises the steps of acquiring the coil temperature of the heat exchanger and comparing the coil temperature with frosting warning temperature; operating the refrigerant heating component if the coil temperature of the heat exchanger is lower than the frosting warning temperature; comparing the coil temperature of the heat exchanger with the frosting risk temperature after the refrigerant heating component runs for a set time; judging whether the heat exchangermeets the defrosting conditions if the coil temperature of the heat exchanger is lower than the frosting risk temperature; and enabling the air conditioner to enter the defrosting mode selectively according to the judgment results. Through such arrangement, the number that the air conditioners enters the defrosting mode can be reduced, and the number that the air conditioner stops running in the heating mode; the influence on indoor temperature is reduced, and the reversing number of a four-way valve can be further reduced; and the service life of the four-way valve is prolonged.

Description

technical field [0001] The invention belongs to the technical field of air conditioners, and specifically provides an air conditioner control method and the air conditioner. Background technique [0002] An air conditioner is a device capable of cooling / heating a room. When the air conditioner is heating and running, the water vapor in the air will condense into frost crystals on the surface of the heat exchanger of the outdoor unit. Air convection heat exchange affects the heating effect of the air conditioner. At this time, it is necessary to defrost the heat exchanger of the outdoor unit. [0003] When it is necessary to defrost the heat exchanger, switch the four-way valve so that the high-temperature and high-pressure gaseous refrigerant discharged from the compressor enters the heat exchanger, and the high-temperature and high-pressure gaseous refrigerant enters the heat exchanger and liquefies, dissipating a large amount of heat. to defrost the heat exchanger. Afte...

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Problems solved by technology

[0006] In order to solve the above-mentioned problems in the prior art, that is, in order to solve the existing air conditioner due to the frosting of the heat exchanger of its outdoor unit, it needs to enter the defrosting frequently mode, which will affect the indoor temperature and the service life of the four-way valve. The present invention provides a control method for an air conditioner. The air conditioner includes an indoor unit and an outdoor unit, and the heat exchanger of the outdoor unit Refrigerant heating components are arranged on it, and the control method includes: acquiring the coil temperature of the heat exchanger; comparing the coil temperature of the heat exchanger with the frosting warning temperature; if the If the coil temperature is lower than the frosting warning temperature, the refrigerant heating component is operated; after the refrigerant heating component operates for a set time, the coil temperature of the heat exchanger is compared with the frosting risk temperature. Comparison; if the coil temperature of the heat exchanger is lower than the frosting risk temperature, then judge whether the heat exchanger meets the defrosting condition; according to the judgment result, selectively make the air conditioner enter the defrosting mode; Wherein, the frosting risk temperature is lower than the frosting warning temperature

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