Combustion control circuit of combustion apparatus

Details Combustion control circuit of combustion apparatus Combustion control circuit of combustion apparatus

1996-11-12

1998-07-07

Joyce, Harold

Furnaces

With control means responsive to a sensed condition

431 12, 431 24, F23N 502, F23N 518

Patent

active

057752362

ABSTRACT:
There is disclosed a combustion control circuit of a combustion apparatus with a driving signal generator, an exhaust fan controller and a gas valve controller, including: a combustion state detector for detecting the state of combustion occurring within a combustion chamber according to an output signal of a flame sensor installed in the combustion chamber, and for producing a signal corresponding to the state of combustion; a reference signal generator for producing a reference signal in response to each output signal of a temperature sensor and a flow sensor; a comparator for comparing the output signal of the combustion state detector with the output signal of the reference signal generator, and for outputting a signal corresponding to a difference therebetween; and an adder for adding the output signal of the comparator to the output signal of the driving signal-generator, and for respectively applying an output to each one of the exhaust fan controller and the gas valve controller.

REFERENCES:
patent: 4133629 (1979-01-01), Clark
patent: 4375950 (1983-03-01), Durley, III
patent: 4455656 (1984-06-01), Tanaka et al.
patent: 5158024 (1992-10-01), Tanaka et al.
patent: 5503183 (1996-04-01), Fenn et al.
patent: 5526776 (1996-06-01), Fenn et al.

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