Fin-tube heat exchanger

Details Fin-tube heat exchanger Fin-tube heat exchanger

1992-02-14

1993-04-20

Flanigan, Allen J.

Heat exchange

Radiator core type

Side-by-side tubes traversing fin means

165182, F28F 132

Patent

active

052034038

ABSTRACT:
A plate fin heat exchanger has a group of fins arranged at predetermined intervals so that an air current flows between the respective fins and a group of tubes respectively inserted into and joined to the cylindrical fin collars which are formed in the fin group with a predetermined longitudinal pitch and lateral pitch. Elliptical seats each having a longitudinally extending short axis are respectively provided around the fin collars on the surface of each of the fins, and seat-side ridge portions are respectively formed along the outer peripheries of the seats. A plurality of fin-side ridge portions, each having a longitudinally linearly extending ridge and substantially the same height as that of each of the seat-side ridge portions, are formed in each line of the fin collars outside the seat-side ridge portions on each of the fins. The turbulence promoting effect of the fin-side ridge portions, each having a longitudinally linearly extending ridge, improves the heat transfer efficiency. In addition, the highest portions of the seat-side ridge portions formed between the fin-side ridge portions cause the air current to be controlled by the wake in the tubes so as to decrease the stagnation region, thereby increasing the heat transfer effective area and improving the heat transfer efficiency.

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