The application relates to an electric vehicle cabin heating system and a control method. The system comprises a first refrigerant circuit (S1) and a second refrigerant circuit (S2) that are connected in parallel, wherein the circuits each comprise a gas-liquid separator (3) and a compressor (6) that are connected in series; the first refrigerant circuit (S1) further comprises a first expansion unit (1); the second refrigerant circuit (S2) further comprises a second expansion unit (8) and a condenser (9); and the first expansion unit (1) is connected to the second expansion unit (8) and the condenser (9) in parallel. Thus, rapid cabin heating and stable heating capacity are achieved, the dependence on a heater is eliminated, and an air-conditioning system is simplified. The method comprises: a refrigerant in the second refrigerant circuit (S2) undergoing pressure regulation via the second expansion unit (8) and then entering the condenser (9) to release heat for heating a cabin; and a refrigerant in the first refrigerant circuit (S1) undergoing throttling and pressure reduction via the first expansion unit (1) and converges with the refrigerant in the second refrigerant circuit (S2) in the gas-liquid separator (3), and the converging refrigerant enters the compressor (6) for cycling. Thus, the decoupling between the regulation of heating capacity and the temperatures and flow rate of exterior ambient air and cabin air is achieved, and the problems of insufficient heating capacity and frequent defrosting of a heat pump system at a low temperature are solved.
ELECTRIC VEHICLE CABIN HEATING SYSTEM AND CONTROL METHOD THEREFOR
ELEKTRISCHES FAHRZEUGKABINENHEIZSYSTEM UND STEUERVERFAHREN DAFÜR
SYSTÈME DE CHAUFFAGE DE CABINE DE VÉHICULE ÉLECTRIQUE ET SON PROCÉDÉ DE COMMANDE
2022-11-02
Patent
Elektronische Ressource
Englisch
IPC: | F25B Kältemaschinen, Kälteanlagen oder Kälteverfahren , REFRIGERATION MACHINES, PLANTS, OR SYSTEMS / 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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