HEAT EXCHANGER

摘要

A heat exchanger which comprises extremely flat ovalshaped tubes extending in a mutuallly parallel and spacedapart relationship and are connected on their narrow side to manifold pipes for forward and return flow. To ensure a sufficiently stable mechanical connection between the pipes and a satisfactory supply and discharge of the heating medium from the manifolds to the flat tubes as well as in the reverse direction, a trough is formed by material removal in the manifold pipes thus creating a connection aperture in the wall of the pipe. The flat tube is fitted into this trough with its rim on the narrow side, to ensure a solid stable welded joint between the pipes. The flat tube is provided on its narrow side with a bore serving as a connection aperture which comes to lie centrally against the connection aperture in the manifold. A trough in the flat tube and a bore in the manifold pipe or a respective trough in the manifold pipe and in the flat tube could be developed as alternatives.