Liquid heaters and vaporizers – Safety devices – Fire extinguishers
Patent
1998-11-02
2000-03-14
Ferensic, Denise L.
Liquid heaters and vaporizers
Safety devices
Fire extinguishers
1225041, 1225043, 122DIG7, 1262875, 126112, F22B 3742
Patent
active
060358122
ABSTRACT:
A fuel-fired water heater has a combustion chamber disposed above a wall ucture forming a flow path for combustion air being drawn into the combustion chamber during firing of the fuel burner portion of the water heater. A combustion air shutoff system is incorporated in the water heater and functions to sense an undesirably high firing temperature in the combustion chamber and responsively shut off essentially all further air flow to the combustion chamber and thereby terminate combustion therein. In various disclosed embodiments thereof, the combustion air shutoff system includes a damper member movable between an open position in which its permits air flow through the combustion air flow path, and a closed position which it blocks essentially all further air flow through the combustion air flow path. The damper is releasably held in its open position by a eutectic metal fusible link member positioned exteriorly adjacent an exterior wall of the combustion chamber. When a predetermined high limit firing temperature is reached within the combustion chamber, the correspondingly increased temperature of the combustion chamber wall melts the fusible link member. In response, the shutoff system causes the damper to move to its closed position to terminate essentially all further flow of combustion air through the combustion air flow path into the combustion chamber.
REFERENCES:
patent: 2870827 (1959-01-01), Brockbank
patent: 2950755 (1960-08-01), Frecourt
patent: 3112788 (1963-12-01), Dunston
patent: 3469569 (1969-09-01), Brockbank
patent: 3680999 (1972-08-01), Hill
patent: 3800816 (1974-04-01), Follett
patent: 4362146 (1982-12-01), Schuller
patent: 4404983 (1983-09-01), Scheurenbrand et al.
patent: 4437829 (1984-03-01), Baker
patent: 4549717 (1985-10-01), Dewaegheneire
patent: 4646847 (1987-03-01), Colvin
patent: 4823770 (1989-04-01), Loeffler
patent: 4858517 (1989-08-01), Coker
patent: 5791298 (1998-08-01), Rodgers
patent: 5797355 (1998-08-01), Bourke et al.
patent: 5797358 (1998-08-01), Brandt et al.
Hall Jacob H.
Harrigill William T.
Ferensic Denise L.
Lin Jipihg
The Water Heater Industry Joint Research and Development Consort
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