HEATING AND AIR CONDITIONING SYSTEM WITH DIFFERENT TEMPERATURE LEVELS FOR A VEHICLE AND METHOD THEREFOR

The invention relates to a heating and air-conditioning system for a vehicle, comprising a first heating and cooling circuit and a refrigerant circuit, the refrigerant circuit comprises at least a compressor, an expansion element, an external heat exchanger which can be operated as an evaporator during heat pump operation, a first heat exchanger on the high-pressure side and a second heat exchanger on the low-pressure side which can be accessed for air-conditioning operation, the heating and air conditioning facility comprises a second heating circuit, the refrigerant circuit comprises a third heat exchanger which is arranged on the high-pressure side downstream of the first heat exchanger in the refrigerant flow direction, and the third heat exchanger is also connected to the second heating circuit; wherein the refrigerant of the refrigerant circuit is directly and/or indirectly thermally coupled to the heating liquid of the second heating circuit in the third heat exchanger by means of a heat exchange connection. The invention also relates to an associated control method and a vehicle having the same.