Air conditioner defrosting control method

Abstract

The invention belongs to the technical field of air conditioners, and particularly relates to a defrosting control method of an air conditioner. In order to accurately determine the defrosting time, the defrosting control method of the air conditioner comprises the following steps of obtaining the average current value Id of a primary outdoor fan every other time t1 in the condition that the air conditioner is in the heating condition, and calculating the first attenuation degree of Id; obtaining the average current value Im of the primary outdoor fan every other time t2 if the first attenuation degree is less than a first preset value, and calculating the second attenuation degree of Im; and determining whether the air conditioner is enabled to enter a defrosting mode according to the second attenuation degree, wherein t2 is equal to nt1, n is an integer which is greater than or equal to 2, Im is equal to (I1+I2+...In) / n, and I1,I2,...,In are average current values, which are respectively obtained every other time t1 within one t2 time period, of the outdoor fan. According to the defrosting control method, the current change condition of the outdoor fan is reflected by utilizing the average current values of the outdoor fan at different time periods, so that the defrosting times of the air conditioner is reduced, and the user experience is increased.

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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