Abstract: A parallel flow vehicle air conditioning condenser utilizes baffle plates with an interference fit. The baffle plates locate within header and tank assemblies. Parallel tubes extend between the header and tank assemblies for causing refrigerant flow between the header and tank assemblies and through the tubes. The header and tank assembly is made up of two portions which are brazed together. The baffle plate has abutment edges that abut the interior walls of the two portions in an interference fit to deform the walls and cause sealing.

Abstract: A tube having a plurality of hydraulically parallel fluid passages for use in a heat exchanger can be made by forming an elongated, undulating insert and disposing the same within a flattened tube. A noncorrosive brazing flux is adhered to at least one of the interior of the tube and the crests on the undulating insert. Braze alloy is also located at the interface of the crests of the insert and the interior wall of the tube. Thereafter, the insert is located within the tube without disturbing the flux and the tube deformed along its length to bring the interior of the tube into contact with the crests on the insert. The assembled tube and insert construction is then heated to braze joints between the interior wall of the tube and the crests of the insert along the entire length of the latter.