WÄRMEÜBERTRAGER, INSBESONDERE LADELUFTKÜHLER ODER KÜHLMITTELKÜHLER FÜR KRAFTFAHRZEUGE

The invention relates to a heat exchanger ( 1 ), in particular a charge intercooler or coolant cooler for motor vehicles, which comprises a soldered block which is made of pipes ( 4 ), ribs and at least one pipe base ( 2 ), in addition to at least one plastic box ( 3 ) which has a wall ( 3 a) which extends in the cross-section and which is approximately U shaped and a surrounding flange ( 3 b). The box is mechanically connected to the pipe base over flange ( 3 b). According to the disclosure, reinforcing ribs are arranged on the inner side of the plastic box ( 3 ) in a transition area between the flange ( 3 b) and the wall ( 3 a).