AIR CONDITIONING DEVICE FOR A MOTOR VEHICLE AND METHOD FOR ITS OPERATION

The invention relates to an air-conditioning device for a motor vehicle, comprising a refrigerant circuit () including a compressor (), an indoor heat-exchanger (WÜ) arrangement connected to the outlet of the compressor and comprising a first and a second air/refrigerant-heat exchanger segment (), a first expansion valve (Exp. valve) () arranged therebetween, a second expansion valve (), and a coupling heat exchanger () thermally connected to a heat source or sink, the outlet of which is connected to the inlet of the compressor (), where the first and the second refrigerant line sections (I/II) are interconnected by means of a fourth refrigerant line section (IV), the inlet of the second air/refrigerant-heat exchanger segment () and the outlet of the coupling heat exchanger are interconnected by means of a fifth refrigerant line section (V) which contains a third expansion valve (), and the outlet of the first air/refrigerant-heat exchanger segment () and the inlet of the compressor () are interconnected by means of a sixth refrigerant line section (VI).