Gas heater

Details Gas heater Gas heater

1991-12-23

1993-08-31

Jones, Larry

Combustion

Timer, programmer, retarder or condition responsive control

Sensor of electrical condition or temperature of electrical...

431 80, 431255, 126 85A, 237 3, F23N 500

Patent

active

052404064

ABSTRACT:
In a gas heater, a ceramic heater is used to ignite gas supplied to a gas burner. The ceramic heater is disposed in flame while the gas is burnt such that a change in the resistance value of the ceramic heater is sensed by a resistance value sensor to detect a flame extinction. Since the resistance value is varied between ceramic heaters, the deviation of the resistance value is compensated for depending on a reference value at a reference temperature of the ceramic heater so as to detect the flame extinction.

REFERENCES:
patent: 3620659 (1971-11-01), Fox
patent: 3663150 (1972-05-01), Hapgood
patent: 3895219 (1975-07-01), Richerson et al.
patent: 4997361 (1991-03-01), Geary

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