Method and apparatus for controlling fuel-to-air ratio of the co

Details Method and apparatus for controlling fuel-to-air ratio of the co Method and apparatus for controlling fuel-to-air ratio of the co

1990-08-20

1992-05-12

Price, Carl D.

Combustion

Process of combustion or burner operation

Controlling or proportioning feed

431 78, 431 79, 431 75, F23N 300

Patent

active

051122170

ABSTRACT:
In a heating appliance employing a radiant burner, a method and apparatus for setting the ratio of gaseous fuel to air supplied to the burner to a desired value. With the gaseous fuel flow rate held constant, the air flow rate is controlled to maintain the fuel-to-air ratio at the desired value. The invention uses a sensor that measures the intensity of radiation emitted by the burner. A control device compares the measured intensity to a reference intensity and regulates the air flow rate such that the measured intensity is equal to the reference intensity. The burner emits radiation equal to the reference radiation intensity when it is burning a combustible gas supply containing the desired fuel-to-air ratio, so that by regulating the air flow rate to cause the burner to emit the reference radiant intensity, the fuel-to-air ratio will be at the desired value.

REFERENCES:
patent: 4043742 (1977-08-01), Egan et al.
patent: 4435149 (1984-03-01), Actheimer
patent: 4445359 (1984-05-01), Smith
patent: 4599066 (1986-07-01), Granberg
patent: 4746287 (1988-05-01), Lannutti
patent: 4830601 (1989-05-01), Dahlander et al.
patent: 4878837 (1989-11-01), Otto
patent: 4927350 (1990-05-01), Zabielski
patent: 4934926 (1990-06-01), Yamazaki et al.

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