Heat pump air-conditioning system and control method thereof
A heat pump air conditioner and control method technology, which is applied to air conditioning systems, heating methods, refrigerators, etc., and can solve problems such as reducing the working performance of the air conditioning system, shortening the running time of high energy efficiency in heating conditions, and reducing the energy efficiency of the air conditioning system, etc.
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[0045] see in conjunction Figure 1 to Figure 8 As shown, according to the embodiment of the present application, the heat pump air conditioning system includes a compressor 1, a four-way valve 2, an indoor heat exchanger 3, a first throttling device 4, an outdoor heat exchanger and a second throttling device 5, the first The throttling device 4 is located on the pipeline between the indoor heat exchanger 3 and the outdoor heat exchanger. The outdoor heat exchanger includes a main heat exchanger 6 and a defrosting heat exchanger 7. The defrosting heat exchanger 7 is located in the main heat exchanger 6 on the upstream side of the air flow, the second throttling device 5 is connected in series with the defrosting heat exchanger 7 to form a defrosting pipeline, and the defrosting pipeline can be selectively connected in parallel with the indoor heat exchanger 3 or the main heat exchanger 6, When the heat pump air conditioning system is in the heating condition, the refrigerant i...
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