Stoves and furnaces – Hot-air furnaces – Compressed air
Patent
1983-12-16
1985-08-27
Yuen, Henry C.
Stoves and furnaces
Hot-air furnaces
Compressed air
237 55, F24H 302
Patent
active
045371784
ABSTRACT:
Disclosed is a dwelling furnace having at least one clam-shell type primary heat exchanger in parallel orientation with a secondary heat exchanger, both the primary and secondary heat exchangers being vertically oriented relative to a furnace housing and parallel to the flow of air to be heated. The primary heat exchanger has a combustion chamber in the lower end thereof, and the lower end of the secondary heat exchanger exhausts into a tertiary heat exchanger oriented approximately perpendicular to the primary and secondary heat exchangers and horizontally relative to the housing, below the combustion chambers of the primary heat exchangers and below the exhaust outlet of the secondary heat exchanger. The tertiary heat exchanger includes a plurality of condensation tubes for retrieving the latent heat of condensation of the combustion gases. The furnace further comprises an induced draft blower for drawing combustion gases through the heat exchangers and inducting sufficient air to the combustion chamber of the primary heat exchanger for efficient combustion.
REFERENCES:
patent: 4079885 (1978-03-01), Decker
patent: 4241874 (1980-12-01), Schossow
patent: 4261326 (1981-04-01), Ihlenfield
patent: 4278126 (1981-07-01), Skrzypek
patent: 4289730 (1981-09-01), Tomlinson
patent: 4318392 (1982-03-01), Schreiber et al.
patent: 4351276 (1982-09-01), Kremer
patent: 4444156 (1984-04-01), Iwasaki et al.
patent: 4454860 (1984-06-01), Schafer et al.
patent: 4480591 (1984-11-01), Deckers
Hwang Kyu S.
Koestler Dennis J.
Duo-Matic/Olsen Inc.
Yuen Henry C.
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