Method of making an automotive heat exchanger with indented pins

Details Method of making an automotive heat exchanger with indented pins Method of making an automotive heat exchanger with indented pins

1997-09-29

1999-02-09

Cuda, I

Metal working

Method of mechanical manufacture

Heat exchanger or boiler making

29890054, B23P 1526

Patent

active

058679049

ABSTRACT:
A heat exchanger of the type used for a condenser in a vehicle air conditioning system includes a pair of parallel, tubular headers which are spaced apart with a plurality of refrigerant flow tubes extending between the headers. The flow tubes have upper and lower flat sides, and forward and rearward outermost edges. The forward and rearward outermost edges longitudinally extend the length of the flow tubes to define forward and rearward outermost planes of the flow tubes, respectively. A plurality of serpentine fins have alternately disposed ridges and furrows which define upper and lower crests. Portions of some of the crests are indented to provide recesses, with tabs extending from one end of the crests. The tabs extend outward and in contact with one of the edges of the flow tubes. The headers and serpentine fins are brazing clad for passing through a brazing furnace to braze the headers and serpentine fins to the flow tubes. The heat exchanger is brazed while in a horizontal plane. The tabs of the fins prevent the fins from slipping downward during brazing.

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