Stoves and furnaces – Hot-air furnaces – Compressed air
Patent
1978-09-08
1980-05-06
Yeung, James C.
Stoves and furnaces
Hot-air furnaces
Compressed air
110190, 110192, 110297, 126 99A, 126109, 126112, 165DIG2, F24H 302
Patent
active
042011876
ABSTRACT:
A solid fuel burning system which may be readily combined with a conventional fluid fuel burning furnace in a forced air heating system. The solid fuel burning system comprises, in combination, a draft inducing blower which directs air for combustion into the furnace at a point proximate the burning fuel. Baffle walls are provided which separate the smoke and other products of combustion from the clean air to be heated and a novel heat exchanger comprised of a plurality of elongated tubes provide a relatively large heat transfer surface. The furnace is specifically designed to facilitate periodic cleaning of the interior walls of the heat exchanger where creosote and other products of combustion may accumulate. In addition, the system employs a novel electronic control circuit which is tied in with the room thermostat and with a thermocouple disposed within the solid fuel burning furnace. The output of the thermocouple is amplified and applied to a series of comparators whose outputs are used to perform various control functions. Specifically, the output from a first comparator indicates that a fire is present in the wood burning unit. A timer mechanism comprised of electronic circuitry becomes operational upon closure of the room thermostat contacts and if the temperature present in the solid fuel burning furnace does not exceed a predetermined threshold within a given period of time, a relay is rendered operational to switch in the fluid fuel furnace.
Additional comparators and digital logic circuitry is used to control the rate of burning of the solid fuel by modulating the on/off condition of the draft inducing blower.
REFERENCES:
patent: 776053 (1904-11-01), Gifford
patent: 1218974 (1917-03-01), Brennan
patent: 1567001 (1925-12-01), Thompson
patent: 1865045 (1932-06-01), Powell
patent: 2014868 (1935-09-01), Steele et al.
patent: 2471351 (1949-05-01), Russell
patent: 2713861 (1955-07-01), Biddle et al.
patent: 3111978 (1963-11-01), Peoples
patent: 3266480 (1966-08-01), Miller et al.
patent: 3552361 (1971-01-01), Helpio
patent: 4020822 (1977-05-01), Harris
patent: 4045263 (1977-08-01), Moore et al.
patent: 4050440 (1977-09-01), Lessin
patent: 4055297 (1977-10-01), Lee
patent: 4078541 (1978-03-01), Roycraft
patent: 4103735 (1978-08-01), Warner
patent: 4106474 (1978-08-01), Hunter et al.
patent: 4131779 (1978-12-01), Tatsukawa et al.
patent: 4136662 (1979-01-01), Willson
patent: 4149671 (1979-04-01), Cagle
Gemini Systems, Inc.
Haugen Orrin M.
Nikolai Thomas J.
O'Connor Daniel J.
Yeung James C.
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