Water heater

Details Water heater Water heater

2005-12-06

2005-12-06

Wilson, Gregory (Department: 3749)

Liquid heaters and vaporizers

Indirectly heated

Separate fluid

C122S031100, C122S122000, C122S00400R

Reexamination Certificate

active

06971335

ABSTRACT:
A water heater is provided in which neutralization process of drain is not required and an excellent heat efficiency is achieved. A route of exhaust gas which is passing through the main heat exchanger18is divided into a first exhaust gas chamber23having a secondary heat exchanger19and a second exhaust gas chamber24having a drain evaporator. Because of this, hot exhaust gas which is passing through only the main heat exchanger18flows into both the secondary heat exchanger19and the drain evaporator100. Therefore, in the secondary heat exchanger19exhaust gas heat can be efficiently recovered by utilizing the hot exhaust gas, and in the drain evaporator100drain can be evaporated efficiently by utilizing the hot exhaust gas.

REFERENCES:
patent: 4393815 (1983-07-01), Pedersen et al.
patent: 5184600 (1993-02-01), Astle, Jr.
patent: 5305735 (1994-04-01), Welden
patent: 5765546 (1998-06-01), Mandeville et al.
patent: 6345769 (2002-02-01), MacIntyre
patent: 2002-098413 (2002-04-01), None
patent: 2002-195645 (2002-07-01), None
patent: 2002-333212 (2002-11-01), None

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