Abstract: A heating and air conditioning device 20 for an automotive vehicle, including a refrigerant circuit 4 in which a refrigerant circulates between three distinctive units 6, 10, 14 exchanging with respective secondary liquid loops 8, 12, 16. An evaporating unit 6 is dedicated to the evaporation of the refrigerant when operating in a cooling mode. A cooling unit 10 is dedicated to the cooling or condensation of the refrigerant when operating in the cooling mode as well as operating in the heating mode. A reversible unit 14 is dedicated to the evaporation of the refrigerant when operating in the heating mode and dedicated to the cooling or condensation of the refrigerant when operating in the cooling mode.

Abstract: The invention relates to a system (1) for the heating, ventilation, and/or air conditioning of a motor vehicle passenger compartment. Said system (1) comprises at least one heat exchanger (6, 7) through which there flows a heat-transfer fluid FC. Said system (1) is equipped with at least one means (13) for pumping the heat-transfer fluid FC at a flow rate of between 40 l/h and 200 l/h, in such a way that a temperature difference of the heat-transfer fluid FC between an outlet (9, 10) and an inlet (11, 12) of the heat exchanger (6, 7) is greater than 45° C.

Abstract: A heating and air conditioning device 20 for an automotive vehicle, comprising a refrigerant circuit 4 in which a refrigerant circulates between three distinctive units 6, 10, 14 exchanging with respective secondary liquid loops 8, 12, 16, wherein: an evaporating unit 6 is dedicated to the evaporation of the refrigerant when operating in a cooling mode, a cooling unit 10 is dedicated to the cooling or condensation of the refrigerant when operating in the cooling mode as well as operating in the heating mode, a reversible unit 14 is dedicated to the evaporation of the refrigerant when operating in the heating mode and dedicated to the cooling or condensation of the refrigerant when operating in the cooling mode.