METHODE ZUR HERSTELLUNG EINES WAERMETAUSCHERS.

摘要

A method of making tube (20) having a plurality of hydraulically parallel fluid passages (46-60) for use in a heat exchanger comprises forming an elongated, undulating insert (40) 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 (41) on the undulating insert (40). Braze alloy is also located at the interface of the crests (41) of the insert and the interior wall (42) 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.