Air-heated heat exchanger

Refrigeration – Gas controller or director

Reexamination Certificate

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Details

C062S506000, C165S146000, C165S150000

Reexamination Certificate

active

07913512

ABSTRACT:
A heat exchanger comprises a first tube having a first fin of a first predetermined height extending outward therefrom. A second tube is vertically spaced above the first tube. The second tube has a second fin of a second predetermined height extending outward therefrom. A fan is positioned to force ambient air across the second tube and then across the first tube to heat a fluid flowing therethrough. A method of heating a fluid comprises sequentially flowing the fluid upward through a plurality of vertically spaced rows of substantially horizontal tubes, and forcing air downward over the plurality of tubes to heat the fluid.

REFERENCES:
patent: 3385073 (1968-05-01), Snelling
patent: 4381592 (1983-05-01), Venables et al.
patent: 4693307 (1987-09-01), Scarselletta
patent: 4901607 (1990-02-01), Beugelsdyk et al.
patent: 5311935 (1994-05-01), Yamamoto et al.
patent: 5472047 (1995-12-01), Welkey
patent: 5848638 (1998-12-01), Kim
patent: 6659170 (2003-12-01), Kale
patent: 6662858 (2003-12-01), Wang
patent: 6789317 (2004-09-01), Sohal et al.
patent: 6928833 (2005-08-01), Watanabe et al.
patent: 2005/0257921 (2005-11-01), Hu

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