Stoves and furnaces – Hot-air furnaces – Compressed air
Patent
1980-06-02
1981-04-14
O'Connor, Daniel J.
Stoves and furnaces
Hot-air furnaces
Compressed air
126 99D, 126108, 165 97, 165122, 165173, 237 53, F24H 302, F28F 2702, F24D 500
Patent
active
042613264
ABSTRACT:
The invention relates to the conversion of a substantially conventional gas fired furnace utilizing two or more of the clam shell-type heat exchanger cells, which is modified by converting one cell to a final stage counterflow heat exchanger for the hot gases of combustion, which modification incorporates directing the gases of combustion from the fired cells in a counterflow path through the non-fired cell by utilizing a positive displacement fan and then exhausting the gases of combustion. The modification eliminates the need for positive venting, while substantially increasing the operational efficiency of the furnace unit. The normal flue gas temperature in this type of furnace will be about 450.degree. F., while with the modification, the temperature will be reduced to less than about 200.degree. F. and efficiency will be increased by greater than 10 percent.
REFERENCES:
patent: 2376170 (1945-05-01), Mueller
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patent: 2470860 (1949-05-01), Parrish
patent: 2496505 (1950-02-01), Thompson
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patent: 3650262 (1972-03-01), Root et al.
patent: 4003407 (1977-01-01), Finger
patent: 4106474 (1978-08-01), Hunter et al.
O'Connor Daniel J.
Smith Jones, Inc.
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