The heat exchange device, in particular, for a motor vehicle comprises at least one component assembly with a first component carrying electric current, and a second component with two parts contacting the first component so that electric charge carriers are exchanged between the first and second components. The first component is shaped to enhance heat transfer, and at least partially surrounds at least one the two parts of the second component. An Independent claim is also included for an air-conditioning unit with the proposed heat exchange device for motor vehicles.
