HEATING AND/OR AIR CONDITIONING SYSTEM WITH INTERNAL HEAT EXCHANGERS

The invention relates to a heating and/or air-conditioning system (1) comprising: a refrigerant circuit (11) comprising at least one compressor (3), a condenser/gas cooler (5), an expansion means (7)and an evaporator (9); and at least one secondary circuit (15) comprising at least one pump (17) for a heat medium, wherein a first internal heat exchanger (13) is integrated in the high-pressure region of the refrigerant circuit (11) between the condenser/gas cooler (5) and the expansion means (7), the first internal heat exchanger is provided for heat exchange between the refrigerant of the refrigerant circuit (11) and the heat medium of the secondary circuit (15), a second internal heat exchanger (19) is integrated in the low-pressure region of the refrigerant circuit (11) between the evaporator (9) and the compressor (3), the second internal heat exchanger being provided for exchanging heat between the refrigerant of the refrigerant circuit (11) and the heat medium of the secondary circuit (15) or between the refrigerant of the refrigerant circuit (11) and a further heat medium of a further secondary circuit (51). The first internal heat exchanger (13) and the second internal heatexchanger (19) are arranged in such a way that they are or can be thermally coupled by means of a heat medium of at least the secondary circuit (15). The invention further relates to a vehicle havingthe heating and/or air-conditioning system (1) and to a method for controlling the heating and/or air-conditioning system (1).