Heat exchange – Radiator core type – Serially connected tube sections
Patent
1995-07-18
1996-07-16
Flanigan, Allen J.
Heat exchange
Radiator core type
Serially connected tube sections
165151, 165DIG498, 29890047, F28D 1047, F28F 132
Patent
active
055358209
ABSTRACT:
An improved method is provided for assembling a heat exchanger by mechanically joining one or more pairs of tubes with fins arranged in a fin pack. The method involves a novel external expansion technique that is performed between pairs of tubes and internally of the fin pack, in a manner that enhances the mechanical joint strength and metal-to-metal contact between the tubes and fins of the heat exchanger, while enabling the assembly process to be reduced to a single operation. Consequently, the method of this invention avoids the shortcomings of internal expansion techniques, and provides a significant improvement over prior art external expansion techniques. The method of this invention also yields a novel heat exchanger configuration, in which only facing surfaces of the tube within the fin pack are deformed in order to expand and mechanically join the tube to the fins. Finally, the present invention also encompasses a unique expansion tool for externally expanding the tube portions within the fin pack.
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Beagle Gerald R.
Bellman Dale C.
Guilford Dallas L.
Southward Charles E.
Blissfield Manufacturing Company
Flanigan Allen J.
Hartman Domenica N. S.
Hartman Gary M.
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