Forward combustion type condensing gas water heater

Details Forward combustion type condensing gas water heater Forward combustion type condensing gas water heater

2011-02-01

2011-02-01

Wilson, Gregory A (Department: 3749)

Liquid heaters and vaporizers

Stand boiler

Fluid fuel burner

C122S031100, C122S135300, C122S175000

Reexamination Certificate

active

07878158

ABSTRACT:
A forward combustion type condensing gas water heater is provided including a burner, a primary heat exchanger, a drain pipe for condensation water, a gathering and discharge device for condensation water, a secondary heat exchanger. The gathering and discharge device and the secondary heat exchanger have center lines different from the primary heat exchanger. Flue gas rises through the primary heat exchanger and passes through the secondary heat exchanger in a direction staggered with respect to the falling direction of condensation water. The condensing gas water heater effectively avoids resistance between the condensation water and the flue gas and prevents the condensation water from flowing to the burner, the combustion chamber, and the ignition pin.

REFERENCES:
patent: 4651680 (1987-03-01), Couprie
patent: 6907846 (2005-06-01), Hur et al.
patent: 7353781 (2008-04-01), Jung et al.
patent: 7434545 (2008-10-01), Lo et al.
patent: 7458340 (2008-12-01), Takeda et al.
patent: 7614366 (2009-11-01), Arnold et al.

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