Defrosting control method for air conditioner

Abstract

The invention belongs to the technical field of air conditioners, and in particular relates to a defrosting control method for an air conditioner. In order to judge the 0pportunity of entering a defrosting mode more accurately, the invention provides the defrosting control method. The defrosting control method comprises the following steps: detecting the real time current value of an outdoor fan and the real time temperature value of an outdoor coil when the air conditioner is in a heating working condition; comparing the real time current value of the outdoor fan with a selected standard current value to acquire a first comparison result; comparing the real time temperature value of the outdoor coil with a selected standard temperature value to acquire a second comparison result; and judging whether the air conditioner enters the defrosting mode or not according to the first comparison result and the second comparison result. The defrosting control method provided by the invention canreflect the frosting amount of the outdoor coil so as to select the defrosting opportunity more accurately and eliminate the boundedness of judging the frosting degree according to the temperature ofthe outdoor coil in the prior art effectively, so that the defrosting number of times of the air conditioner is reduced, and the user experience is enhanced.

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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