Improved hot surface ignitor

F - Mech Eng,Light,Heat,Weapons – 23 – Q

Patent

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Details

F23Q 7/22 (2006.01) F23N 5/20 (2006.01) F23Q 7/24 (2006.01) F23N 5/12 (2006.01)

Patent

CA 2197607

An ignition circuit and method for a hot surface ignitor. The ignition process and apparatus enforces a short warm-up period for the hot surface ignitor where approximately half power is supplied at start-up to the ignitor until the ignitor warms to a point where its impedance is increased. By warming the ignitor gradually, the system power supply is not pulled down to a level which may cause malfunction of other electronics connected to the same supply. Further, the voltage level to the ignitor is controlled so that service life of the ignitor is extended.

ircuit d'allumage et méthode pour un allumeur à surface chauffante. Le processus d'allumage comporte une courte période de réchauffage pour l'allumeur à surface chauffante pendant laquelle environ la moitié de la puissance est fournie à l'allumeur au démarrage jusqu'à ce que l'allumeur se réchauffe au point où son impédance est augmentée. En réchauffant l'allumeur graduellement, la source d'alimentation du système n'est pas affaiblie à un niveau susceptible de causer le mauvais fonctionnement d'autres composants électroniques raccordés à la même source. De plus, le niveau de tension fourni à l'allumeur est contrôlé, de sorte que la durée de vie de l'allumeur est prolongée.

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