Heat exchanger and fin material for the heat exchanger

Details Heat exchanger and fin material for the heat exchanger Heat exchanger and fin material for the heat exchanger

2006-01-20

2009-02-03

Zimmerman, John J (Department: 1794)

Stock material or miscellaneous articles

All metal or with adjacent metals

Composite; i.e., plural, adjacent, spatially distinct metal...

C148S535000, C148S658000, C165S905000, C228S262510

Reexamination Certificate

active

07485374

ABSTRACT:
A heat exchanger which has i) a fin material comprising a triple-layer clad material constituted of a core material composed of an aluminum alloy containing from 0.5 to 1.8% by weight of Mn and from 0.5 to 3.0% by weight of Zn and, provided on both sides of the core material, a brazing filler material composed of an Al—Si alloy containing from 6.5 to 13.0% by weight of Si and from 0.15 to 0.60% by weight of Cu and ii) an aluminum alloy tube having a Zn concentrated surface; the both having been brazed with each other; wherein, after brazing, recrystallized grains of the core material have an average length of from 100 to 1,000 μm in the lengthwise section of a fin and the recrystallized grains of the core material are 4 or less in average number in the thickness direction of that lengthwise section. This heat exchanger is improved in the durability of fin joints and fins themselves and their strength after corrosion.

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Translation of JP 2004-170061. Machine translation generated on Sep. 13, 2008.
Translation of JP 2004-084060. Machine translation generated on Sep. 13, 2008.

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