Defrosting control method used for air conditioning unit

Abstract

The invention belongs to the technical field of air conditioner defrosting, and particularly relates to a defrosting control method used for an air conditioning unit. The invention aims to solve the problem of a current defrosting control method that an optimum starting timing for a defrosting mode is difficult to determine. Therefore, the defrosting control method comprises the steps that outdoordry-bulb temperature, outdoor wet-bulb temperature and outdoor coil temperature, evaporation pressure and current operation time of the air conditioning unit are obtained; current air outlet volume of an outdoor unit is determined according to the outdoor dry-bulb temperature, the outdoor wet-bulb temperature, the outdoor coil temperature, the evaporation pressure and the current operation time;and the air conditioning unit is controlled to enter the outdoor unit defrosting mode selectively according to the current air outlet volume of the outdoor unit. According to the defrosting control method, no other elements need to be additionally arranged when the air outlet volume of the outdoor unit is determined; the air outlet volume is not affected by other irrelevant factors; and the optimum starting timing for the defrosting mode can be accurately determined, and thus a long-time high-efficient operation state of the air conditioning unit is effectively ensured.

Description

technical field [0001] The invention belongs to the technical field of air-conditioning defrosting, and in particular relates to a defrosting control method for an air-conditioning unit. Background technique [0002] The air conditioning unit includes an indoor unit, an outdoor unit, and a refrigerant circulation circuit connected between the indoor unit and the outdoor unit. The refrigerant continuously exchanges heat between the outdoor unit and the indoor unit through the refrigerant circulation circuit, thereby changing the room temperature. Take the heating condition of the air conditioner as an example, since the coil of the outdoor unit is always in a low temperature state, and the outdoor temperature is also low; at this time, if the outdoor environment still has high humidity, the coil of the outdoor unit will The tubes are prone to frosting, and as the frosting continues, the heat exchange efficiency of the outdoor unit will drop sharply, which will lead to the con...

AI Technical Summary

Problems solved by technology

[0005] In order to solve the above-mentioned problems in the prior art, that is, in order to solve the problem that the existing defrosting control method is difficult to accurately judge the best time for the air-conditioning unit to enter the defrosting mode, the present invention provides a defrosting control method for the air-conditioning unit , the air-conditioning unit includes an outdoor unit, and the defrosting control method includes: obtaining the outdoor dry-bulb temperature, the outdoor wet-bulb temperature, and the outdoor coil temperature of the air-conditioning unit, the evaporation pressure, and the current running time; according to the outdoor The dry bulb temperature, the outdoor wet bulb temperature, the outdoor coil temperature, the evaporating pressure and the current running time determine the current air volume of the outdoor unit; according to the current air volume of the outdoor unit, select Control the air conditioning unit to enter the outdoor unit defrosting mode

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