Flat tubes for heat exchanger

Details Flat tubes for heat exchanger Flat tubes for heat exchanger

1997-07-03

2000-06-13

Leo, Leonard

Heat exchange

Tubular structure

165173, 165183, F28F 106

Patent

active

060736887

ABSTRACT:
A flat tube 2 for a heat exchanger which is formed by bending a single plate or overlaying two plates, wherein long beads 11 in a plurality of rows are previously formed on the plate in the longitudinal direction of the plate, the plate has its surface, to which the respective long beads are opposed, formed flat, the tops of the respective long beads 11 and the flat surface are joined, a plurality of passages 12 for a medium are formed within the tube by long beads and the flat surface, sections at the tube ends to be inserted into the header tanks 3, 4 are pressed back to be flat to form tube insertion sections, and a wall relief, which is formed to protrude in the breadth direction of the tube when the tube insertion sections are formed, is used as a stopper 16 to restrict a tube insertion level.

REFERENCES:
patent: 3708012 (1973-01-01), Zimprich
patent: 5052479 (1991-10-01), Nakajima et al.
patent: 5172476 (1992-12-01), Joshi
patent: 5186250 (1993-02-01), Ouchi et al.
patent: 5441105 (1995-08-01), Brummett et al.
patent: 5689881 (1997-11-01), Kato

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