Air-conditioner defrosting control method

Abstract

The invention belongs to the technical field of air-conditioners, and particularly relates to an air-conditioner defrosting control method. In order to accurately judge the opportunity for entering the defrosting mode, the defrosting control method comprises the steps that under the condition that an air-conditioner is in the heating working condition, a real-time current value of an outdoor draught fan and a real-time temperature value of an outdoor coiler are detected; the relative humidity of the position where an outdoor unit is located is obtained; the real-time current value of the outdoor draught fan is compared with a selected standard current value, and a first comparative result is obtained; the real-time temperature value of the outdoor coiler is compared with a selected standard temperature value, and a second comparative result is obtained; and based on the relative humidity, whether the air-conditioner enters the defrosting mode or not is judged according to the first comparative result and the second comparative result. According to the air-conditioner defrosting control method, the judgment condition of the relative humidity is added, the frosting degree of the outdoor coiler can be judged more accurately, limitation generated when the outdoor coiler temperature is singly adopted for judging the frosting degree in the prior art is effectively eliminated, the defrosting time number of the air-conditioner is decreased, and the user experience is improved.

Description

technical field [0001] The invention belongs to the technical field of air conditioners, and in particular relates to an air conditioner defrosting control method. 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 affec...

AI Technical Summary

Problems solved by technology

However, this method of judging frosting requires high accuracy of the outdoor coil sensor, and it is more accurate when the outdoor heat exchanger has a good shunt flow. Once the outdoor heat exchanger does not have a good shunt flow, the outdoor coil sensor will It is impossible to accurately determine the evaporation temperature of each branch flow (the outdoor coil sensor can only determine the evaporation temperature of one branch flow)

In this case, the following situation is likely to occur: the outdoor coil has actually frosted, but the temperature of the outdoor coil is high, so the defrosting cannot be accurately controlled, resulting in frost failure or defrosting unclean situation

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