Heat exchanger

Heat exchange – With first fluid holder or collector open to second fluid

Reexamination Certificate

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Details

C165S173000

Reexamination Certificate

active

06854511

ABSTRACT:
A heat exchanger includes a header (2) and a plurality of tubes (1) connected thereto. The header (2) includes an inner peripheral wall portion (10) having a generally flattened arc-shaped cross-sectional shape to which the tubes (1) are connected, an outer peripheral wall portion (1) having a generally semi-circular cross-sectional shape which faces to the inner peripheral wall portion (10) and connecting curved peripheral wall portions (12) connecting the inner peripheral wall portion (10) and the outer peripheral wall portion (11). The parameters of the hollow header (2), such as a radius of external curvature Ra of the inner peripheral wall portion (10), a radius of external curvature Rb of the connecting curved peripheral wall portion (12), and a radius of external curvature of the outer peripheral wall portion (11), fall within a specified range, thereby reducing the header capacity and weight while securing sufficient pressure resistance.

REFERENCES:
patent: 5560425 (1996-10-01), Sugawara et al.
patent: 5743329 (1998-04-01), Damsohn et al.
patent: 6056047 (2000-05-01), Gowan
patent: 6145589 (2000-11-01), Gowan
patent: 20020153131 (2002-10-01), Sugawara et al.
patent: 20030085030 (2003-05-01), Gowan et al.
patent: 1342801988 (1988-09-01), None
patent: 814911989 (1989-05-01), None
patent: 5-18690 (1993-01-01), None
patent: 9-113177 (1997-05-01), None

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