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. To more accurately judge the time for defrosting, the provided defrosting control method comprises the steps that under the circumstance that an air conditioner is in a heating work condition, the real-time current value of an outdoor draught fan and the real-time temperature value of an indoor coil pipe are detected; the real-time current value of the outdoor draught fan is compared with the selected first standard current value, the selected second standard current value and the selected third standard current value, and a first comparison result is obtained; the real-time temperature value of the indoor coil pipe is compared with the selected firststandard temperature value, the selected second standard temperature value and the selected third standard temperature value, and a second comparison result is obtained; and according to the first comparison result and the second comparison result, whether the air conditioner enters the defrosting mode or not is judged. By means of the air conditioner defrosting control method, the defrosting timecan be more accurately selected, the limitation that in the prior art, an outdoor coil pipe is adopted for judging the defrosting degree is effectively eliminated, the defrosting frequency of the airconditioner is reduced, 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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