Patent ID: 6986385

Claim:
A heating/air-conditioning installation for a motor vehicle, the installation comprising a thermal loop which includes a refrigerating compressor, a condenser, a pressure-reducing valve, an evaporator and a heating element; the condenser and the heating element are interconnected together into a main fluid-carrying heat exchanger provided to simultaneously carry both a heat-carrying fluid and a refrigerant fluid; the main fluid-carrying heat exchanger includes at least one first circulation element carrying the heat-carrying fluid and at least one second circulation element carrying the refrigerant fluid; the at least one first circulation element has a first longitudinal axis; and the at least one second circulation element has a second longitudinal axis; wherein the first longitudinal axis is substantially parallel to the second longitudinal axis and wherein the at least one first circulation element at least partially circumscribes the at least one second circulation element so that the at least one first circulation element is in contact with the at least one second circulation element.