Laminated type heat exchanger

Details Laminated type heat exchanger Laminated type heat exchanger

1996-07-16

1998-02-24

Rivell, John

Heat exchange

With coated, roughened or polished surface

29890054, 228226, 1651341, 165176, 165153, F28F 1902

Patent

active

057203407

ABSTRACT:
A laminated type heat exchanger includes a plurality of refrigerant passages which are formed by pairs of core plates. Each core plate comprises an outer covering layer, a core layer, and an inner covering layer. The outer covering layer is made of a brazing material of which electric potential is more negative than the core layer while the inner covering layer is made of a brazing material of which electric potential is equal to or more positive than the core layer. The refrigerant passages are formed by brazing only the adjacent two of the inner covering layer. The outer covering layer works as a sacrificial corrosive material with respect to the inner covering layer and the core layer. Leakage of refrigerant from the brazed portions of the core plates is prevented, whereby the corrosion resistance of the laminated type heat exchanger is improved.

REFERENCES:
patent: 4949543 (1990-08-01), Cottone et al.
patent: 5042574 (1991-08-01), Cottone et al.
patent: 5125452 (1992-06-01), Yamauchi et al.
patent: 5176205 (1993-01-01), Anthony
Journal of Nippondenso Technical Disclosure 70-148 dated Feb. 15, 1990.

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