Method of fabrication of a heat exchanger

摘要

A method of fabrication of a heat exchanger is disclosed.
A plurality of plate fins (26,50) having open ended slots (34) are assembled to a plurality of tube runs having the same cross-sectional shape as the slots (34) such that an edge (40) of each tube run extends a short distance out of the slots (34) in which it is received.
This assemblage is located on a supporting surface with said tube run edges (40) contacting said supporting surface and said fins (26,50) above and out of contact with said supporting surface.
The assembly resulting from the preceding steps is subjected to brazing temperature in the absence of brazing fixtures holding said tube runs and said fins in assembled relation for a time sufficient to allow said fins to settle under gravitational forces onto said tube runs.