Abstract: The invention concerns a heat exchanger comprising a heat exchanger block having a plurality of tubes and fins arranged transversely to the tubes, at least one tube plate and a water tank, both made of a synthetic plastic material. The tube plate has orifices to receive the ends of the tubes and the water tank is fastened in a water tight manner to the tube plate. In order to obtain a simple and reliable joint of the heat exchanger tubes with the tube plate and the water tank with the tube plate, the plastic tube plate is provided on one side with projections. The orifices are located in these projections and the ends of the tubes are mounted in these orifices by expansion in the radial direction or impression in the axial direction. Both the tube plate and the water tank are equipped with flat surfaces at their edges. These surfaces rest on each other and the tube plate is joined with the water tank by vibration welding on these surfaces.

Abstract: Disclosed is an evaporator comprising a connector member comprising at least two plates located one above the other, a Venturi distributor connected to the connector member for receiving and distributing a coolant, wherein the Venturi distributor divides the coolant into a plurality of streams, a plurality of channels arranged as grooves on the surface of one of said two plates and covered by the other of said two plates for conducting the coolant streams from the Venturi distributor, the channels corresponding in number to the streams with each channel being positioned to receive one of the streams from the Venturi distributor, a plurality of evaporator pipes connected to the connector member in parallel flow arrangement, the pipes corresponding in number to the channels with each pipe being connected to one of the channels, thereby forming a continuous coolant flow path from the Venturi distributor via the channels to the evaporator pipes, and a collection chamber formed in the connector member for receivin

Abstract: A radiator for motor vehicles is provided which has several tubes opening to respective upper and lower radiator tanks and arranged parallel to one another for the guidance of heat exchange fluid. Heat exchange fins are disposed perpendicularly to the tubes and are fixedly connected thereto. The fins exhibit respective cut-out openings forming a groove at at least one of the surfaces of the fin blocks, which groove expands toward the inside and serves for connecting lateral parts, which lateral parts grip with tabs into the groove formed by the cut-outs. Each lateral part is formed of two halves which are pivotally connected with one another along an axis running in the direction of the groove and which are provided with tabs which extend outwardly over the lateral edges of the halves into the groove and abut the fins on the lateral walls of the groove. To form a rigid or stiff connection between the lateral part halves after their installation in the groove, locking or closing elements are provided.