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 more accurately judge the opportunity for entering the defrosting mode, the air-conditioner defrosting control method comprises the steps that under the condition that an air-conditioner is in the heating working condition, current average values of an outdoor draught fan are obtained every preset time; the current average values of the outdoor draught fan are compared with a standard current average value; and whether the air-conditioner enters the defrosting mode or not is judged according to the comparative result, wherein the standard current average value is the current average value, obtained at the first time, of the outdoor draughtfan after the air-conditioner starts to run this time. As the current average values of the outdoor draught fan can more accurately reflect current changes of the outdoor draught fan, misjudging conditions generated by sudden changes of single current values can be effectively avoided, the frosting state of an outdoor coiler can be judged more reasonably, the defrosting opportunity can be selectedmore accurately, 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 heating and running, if the temperature of the outdoor coil is too low under certain humidity conditions, it will cause frosting, and the frosting of the outdoor unit coil will reduce the heat exchange efficiency of the outdoor heat exchanger and affect the performance of the air conditioner. The heating effect reduces the comfort of the indoor environment and affects t...

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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