Combustion – Timer – programmer – retarder or condition responsive control – By combustion or combustion zone sensor
Patent
1982-09-23
1986-05-13
Focarino, Margaret A.
Combustion
Timer, programmer, retarder or condition responsive control
By combustion or combustion zone sensor
431 12, 431 75, 431 90, F23N 512
Patent
active
045883726
ABSTRACT:
A gas burning furnace has a burner in which the premixed fuel/air ratio of the burned gas in the burner flame is measured by a flame rod sensing the ionization current. The flame rod is connected to a fuel/air controller which controls the gas and primary air to the burner to maintain the maximum flame ionization current which results in an excessive amount of gas to the burner. The secondary air to the combustion chamber is proportionally controlled to add sufficient oxidant to the gas combustion in the combustion chamber to ensure complete combustion. Other properties of the flame or combustion products can also be used.
REFERENCES:
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patent: 4340355 (1982-07-01), Nelson et al.
patent: 4348169 (1982-09-01), Swithenbank et al.
Honeywell Brochure 95-6957-1, FSP 1400 Fuel-Air Ratio Sensor, Rev. 10-70.
Blinn Clyde C.
Focarino Margaret A.
Honeywell Inc.
Price Carl D.
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