Refrigerant circuit for a vehicle air-conditioning system and method of air-conditioning a vehicle interior

Abstract

The invention relates to a refrigerant circuit () of a vehicle air-conditioning system (), in particular for electric vehicles, comprising a compressor unit () which includes a first compressor () and a second compressor () arranged downstream for compressing a refrigerant (), a condenser () for heating air () which can be supplied to a vehicle interior, a first pressure reducing unit () arranged downstream of the condenser () for decompressing the refrigerant () from the condenser (), a heat exchanger () through which refrigerant flows for heat exchange with vehicle ambient air (), an evaporator () for cooling air () which can be supplied to a vehicle interior, and a second pressure reducing unit () arranged upstream of the evaporator () for decompressing the refrigerant () from the heat exchanger (), the second compressor (), the condenser () and the first pressure reducing unit () being bypassed in a cooling mode of the vehicle air-conditioning system (), and the evaporator () and the second pressure reducing unit () being bypassed in a heating mode of the vehicle air-conditioning system (). The invention furthermore relates to a method of air-conditioning a vehicle interior, in particular by means of the refrigerant circuit () described above.