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 time of entering a defrosting mode, the defrosting control method comprises the following steps that under the condition that the air conditioner is in a heating working condition, a real-time current value of an outdoor fan and the temperature of an indoor coil pipe are detected; the real-time current value of the outdoor fan is compared with the selected standard current value; and whether the air conditioner entersthe defrosting mode or not is judged according to the comparison result on the basis of the temperature of the indoor coil pipe. The standard current values are the current values measured under different rotating speeds of the outdoor fan in a nonfrosting state of an outdoor unit. According to the air conditioner defrosting control method, the frosting amount of an outdoor coil pipe can be reflected more accurately, the defrosting time can be selected more accurately, the limitation that in the prior art, the temperature of the outdoor coil pipe is adopted for judging the frosting degree is effectively eliminated, the number of defrosting times of the air conditioner is reduced, and 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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