Fuel control and preheating system for a fuel-burning heater

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

Patent

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Details

F23D 11/44 (2006.01) F23K 5/16 (2006.01) F23K 5/20 (2006.01)

Patent

CA 2214228

A fuel control and preheating module for use with an oil-burning furnace including a fuel line providing a passageway section through which oil is routed from a reservoir to the furnace for burning includes an electrically-powered positive temperature coefficient (PTC) heating element mounted in heat transfer relationship with oil contained with the passageway section. During the operation of the PTC element, the PTC element heats the oil contained within the passageway section to a preselected temperature and maintains the oil contained within the passageway section at the preselected temperature. Also associated with the module is a movable diaphragm and shutoff plate which is responsive to the internal pressure changes in the air passageway of the furnace upon shutdown and start-up of the furnace to withdraw oil from and shut off delivery of oil to the nozzle upon furnace shutdown and to push oil toward the nozzle upon start-up of the furnace.

Un module de contrôle et de préchauffage du combustible à utiliser avec un appareil de chauffage au mazout comprenant une canalisation avec section de passage pour l'acheminement du mazout depuis un réservoir jusqu'à l'appareil de chauffage pour y être brûlé comprend un élément de chauffage électrique à coefficient de température positif (CTP) monté en relation de transfert de chaleur avec le mazout contenu dans la section de passage. Quand il fonctionne, l'élément CTP réchauffe le mazout contenu dans la section de passage à une température préchoisie et le maintient à cette température. Le module est complété par une membrane mobile et un clapet d'arrêt qui réagissent aux changements de pression interne dans le passage d'air de l'appareil de chauffage quand il s'arrête et qu'il démarre pour retirer le mazout de l'ajutage et en couper l'alimentation quand l'appareil de chauffage s'arrête et amener le mazout à l'ajutage quand l'appareil de chauffage démarre.

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