Vehicular heat pump air-conditioning system and defrosting method for vehicular heat pump air-conditioning exterior unit
A heat pump air conditioner and compressor technology, applied in air conditioning systems, heating methods, refrigerators, etc., can solve problems such as increasing thermal resistance and wind resistance, slow defrosting effect, frost occupation of ventilation areas between heat exchanger fins, etc. , to achieve the effect of prolonging the service life, ingenious technical scheme, and good defrosting effect
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[0016] refer to figure 1 , the refrigerant outlet 1.1 of the compressor 1 is connected to the liquid inlet 2.1 of the external unit assembly through the cooler core 10, the valve part of the heating expansion valve 7, the first electromagnetic stop valve 3, and the refrigerant The outlet 1.2 is also connected to the liquid inlet 2.1 of the off-board unit assembly 2 through the third electromagnetic cut-off valve 5; The valve part, the evaporator core 9, and the temperature sensing part of the refrigeration expansion valve 8 are connected to the refrigerant inlet 1.2 of the compressor 1, and the liquid outlet 2.2 is also connected to the fourth electromagnetic cut-off valve 4 and the heating expansion valve 7. The warm part is connected with the refrigerant inlet 1.2 of the compressor 1 .
[0017] The air passage includes a cooling air passage 15 and a heating air passage 14. The inlets of the two air passages correspond to the blower motor 12, and the outlets are all connecte...
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