Process and circuit arrangement for igniting a gas stream

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

Patent

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F23N 5/10 (2006.01)

Patent

CA 2515944

The invention relates to a method and a circuit for igniting a gas flow in a fully automatic manner. The aim of the invention is to maintain the necessary current consumption so low that an integratable voltage source can be used. To this end, once an electronic control unit has been activated, a thermoelectric safety pilot valve (2) is opened by an electromagnet which is temporarily excited by a rush of current, is maintained in the open position by a safety pilot magnet (6) by means of a holding current provided by a voltage source (10), and the escaping gas is ignited. Once a thermoelectric couple (4) is provided for the necessary holding current, the voltage source (10) is switched off. In the event of damage, the method is automatically interrupted.

L'invention concerne un procédé et un circuit permettant d'allumer un flux de gaz de manière entièrement automatique. L'objectif de cette invention est de maintenir la consommation de courant nécessaire à l'allumage à un niveau si faible qu'une source de tension intégrable peut être utilisée. A cet effet, après l'activation d'une unité de commande électronique, une soupape de sécurité d'allumage thermoélectrique (2) est ouverte par l'intermédiaire d'un électroaimant (5) qui est excité momentanément par une impulsion de courant et maintenue en position ouverte par l'intermédiaire d'aimants de sécurité d'allumage (6), au moyen d'un courant de maintien fourni par une source de tension (10), et le gaz qui s'écoule est allumé. Dès qu'un élément thermique (4) a fourni le courant de maintien nécessaire, la source de tension (10) est mise hors circuit. En cas de panne, le procédé selon l'invention est automatiquement interrompu.

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