Stoves and furnaces – Hot-air furnaces – Compressed air
Patent
1998-11-30
1999-09-14
Yeung, James C.
Stoves and furnaces
Hot-air furnaces
Compressed air
126106, 126109, F24H 302
Patent
active
059506164
ABSTRACT:
A high efficiency heater system made up of a longitudinally extending combustion chamber located within an external enclosure which is spaced apart from the combustion chamber to provide an air space. A burner assembly provides combustion gases into one end of the combustion chamber which travel down the chamber and are exhausted through flue gas vents at the other end of the chamber. An air path divider separates the air space between the upper portion of the combustion chamber and the enclosure from the air space between a lower portion of the combustion chamber and the enclosure. A blower supplies ambient air which flows into the upper air space, flows along the hottest part of the combustion chamber and then, upon reaching the flue gas end of the combustion chamber, reverses direction and travels back along the lower air space before being exhausted into the ambient air. In a preferred embodiment a swirl plate on the burner assembly imparts a swirl to the combustion gases which increases the efficiency of heat transfer as well as reduces the tendency of ash to form on the upper surface of the combustion chamber.
REFERENCES:
patent: 2645278 (1953-07-01), Thouse, Sr. et al.
patent: 4501390 (1985-02-01), Modzinski
patent: 4706646 (1987-11-01), Christianon et al.
patent: 4955359 (1990-09-01), Briggs et al.
Shenandoah Manufacturing Company, Inc.
Yeung James C.
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