Stoves and furnaces – Stoves – Heating
Patent
1991-04-01
1992-05-19
Dority, Carroll B.
Stoves and furnaces
Stoves
Heating
126 83, F24C 114
Patent
active
051138433
ABSTRACT:
A combustion device is described by several embodiments to enable efficient, clean burning of fuel in combustors. In stove and fireplace embodiments, primary, secondary and tertiary air supplies are provided within a firebox at selected locations relative to an upwardly inclined baffle to maximize combustion of particulates and gases. The primary air feed includes openings above the intended coal bed and includes an intake partially spaced from the firebox to maintain incoming primary air cool and oxygen rich, and to avoid direct impingement with the fuel bed. Secondary air is provided adjacent a forward downturned end of the insulated baffle to produce turbulence and supply oxygen to support combustion adjacent to baffle edge. Tertiary air tubes receive air from side chambers that in turn are connected to air delivery ducts situated with respect to the firebox to maintain a desired range of 250.degree.-650.degree. F. of incoming airstreams admitted by the tubes just under the baffle. A rearward pair of tertiary ducts deliver the air forwardly in a substantially horizontal plane. The front tertiary duct delivers air forwardly and downward to impinge with secondary air and create turbulence at the forward baffle edge to encourage maximum combustion of any remaining gases and particulates before they pass over the baffle and move to the exhaust flue. A retrofit unit for existing combustors such as fireplaces includes the tertiary air supply and ducts arranged under the angular baffle to assist more complete combustion of gases and particulates.
REFERENCES:
patent: 4672946 (1987-06-01), Craver
patent: 4766876 (1988-08-01), Henry et al.
A drawing of a stove publicly shown at a trade show in Reno, Nev. around Mar. 1989.
Henry Daniel S.
Hoteling G. Michael
Alladin Steel Products
Dority Carroll B.
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