The invention discloses a two-heat-exchanger heat pump air conditioning system for a small electric vehicle. The system comprises an indoor heat exchanger, a thermostatic expansion valve connected with the inlet and outlet end of the indoor heat exchanger, a one-way valve connected with the thermostatic expansion valve in series, an electronic expansion valve connected with the one-way valve in parallel, and an outdoor heat exchanger connected with one parallel end of the electronic expansion valve and the one-way valve in series. One end of the outdoor heat exchanger is connected in series with an electromagnetic valve group, one end of the electromagnetic valve group is connected in parallel with a compressor and a gas-liquid separator connected in series with the compressor, and the other end of the electromagnetic valve group is connected in series with a thermostatic expansion valve; according to the air conditioning system, the air conditioning mode or the heat pump mode is switched by cutting off the electromagnetic valve set, the thermostatic expansion valve, the electronic expansion valve and the one-way valve. According to the invention, the problems of insufficient refrigerant flow direction and insufficient number of heat exchangers in a heat pump air-conditioning system with two heat exchangers are solved, the utilization efficiency of indoor and outdoor heat exchangers is improved, the structure is simple, the efficiency is high, the energy is saved, and the stability is good.
本发明公开了一种小型电动汽车用两换热器热泵空调系统,包括:室内换热器、与所述室内换热器进出口端连接的热力膨胀阀、与所述热力膨胀阀串联的单向阀、与所述单向阀并联的电子膨胀阀及与所述电子膨胀阀及单向阀一并联端串联的室外换热器;所述室外换热器的一端串联有电磁阀组,所述电磁阀组一端上并联有压缩机及与所述压缩机串联的气液分离器,且所述电磁阀组另一端上串联有热力膨胀阀;该空调系统通过所述电磁阀组、热力膨胀阀、电子膨胀阀及单向阀的切断来切换空调模式或热泵模式。根据本发明,解决了两换热器热泵空调系统中制冷剂流向和换热器数量不足的问题,提高了室内外换热器的利用效率,结构简单,高效节能,稳定性好。
Two-heat-exchanger heat pump air conditioning system for small electric vehicle
一种小型电动汽车用两换热器热泵空调系统
2021-05-07
Patent
Electronic Resource
Chinese
IPC: | B60H ARRANGEMENTS OR ADAPTATIONS OF HEATING, COOLING, VENTILATING, OR OTHER AIR-TREATING DEVICES SPECIALLY FOR PASSENGER OR GOODS SPACES OF VEHICLES , Anordnung oder Einbau der Heizung, Kühlung, Lüftung oder anderer Luftbehandlungsvorrichtungen für die Fahrzeugräume für Reisende oder Fracht |
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