Liquid heaters and vaporizers – Indirectly heated separate injected fluid
Reexamination Certificate
2005-12-16
2008-12-02
Wilson, Gregory A (Department: 3749)
Liquid heaters and vaporizers
Indirectly heated separate injected fluid
C122S033000, C165S157000
Reexamination Certificate
active
07458340
ABSTRACT:
A secondary heat exchanger B for recovering latent heat from combustion gas includes water tubes5each of which is so inclined that a first end50ais positioned lower than a second end50b. Therefore, in draining water from each of the water tubes5, water can be caused to flow smoothly into a water-inflow and hot-water-outflow header6A connected to the first ends50a. The secondary heat exchanger B includes a casing7which includes an upper wall70aand a bottom wall70bwhich are so inclined that the inner surfaces thereof extend generally in parallel with the water tubes5, and the upper and the lower gaps79aand79bhave constant widths s2and s3. Therefore, the amount of heat recovery from the combustion gas passing through the gaps79aand79bcan be increased.
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International Search Report.
Amada Keiichi
Asakura Hiroshi
Kameyama Shuji
Kimura Kazuhiro
Matsunaga Hironao
Noritz Corporation
Rader & Fishman & Grauer, PLLC
Wilson Gregory A
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