Defrosting control method of heat pump air conditioner unit
A control method and technology of heat pump air conditioners, which are applied in heating methods, heating and ventilation control systems, refrigerators, etc., can solve the problems of long defrosting time, decreased heating capacity of the device, and low air supply temperature of indoor units, and achieve indoor air conditioning. The effect of small temperature fluctuation, improved comfort and large heating capacity
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[0046] The defrosting control method of the heat pump air conditioner unit of the present invention is a defrosting control mode of the heat pump air conditioner in different regions and modes. It divides the outdoor ambient temperature T4 into N regions at the initial operation of the heat pump unit, and each region adopts Different defrosting control methods, according to the detected outdoor ambient temperature T4 at the beginning of the operation of the heat pump unit, adopt the corresponding defrosting method.
[0047] The heat pump unit turns on the heating mode, the compressor and the four-way reversing valve are energized, the controller program starts timing, and starts to detect the outdoor ambient temperature T4 in the initial stage, the outdoor heat exchanger temperature T3 in the time period t1-t2, and record t1- The minimum value of the temperature T3 in the time period t2 is recorded as T30; when the timing t reaches the specified requirements of t...
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