Vehicle heating appliance with cooled fuel pump

F - Mech Eng,Light,Heat,Weapons – 24 – H

Patent

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Details

F24H 9/20 (2006.01) B60H 1/22 (2006.01) F23K 5/14 (2006.01)

Patent

CA 2178005

In a vehicle heating appliance, a burner is supplied with combustion air by a combustion air fan and with fuel by a fuel dosing pump. The heat generated by the burner is a combustion chamber is absorbed by a liquid or gaseous heat transfer medium through a heat exchanger that surrounds the combustion chamber and is transferred to the areas to be heated. In order to avoid malfunctions of the fuel dosing pump caused by steam bubbles produced by overheating, the fuel dosing pump must be kept cool. To ensure an efficient cooling of the fuel dosing pump, the fuel dosing pump is mounted in a compact manner in a suction channel (8) of the combustion air fan (1). When the vehicle heating appliance is in operation, combustion air flows past the outer surface of the fuel dosing pump (14) and cools the pump before being led to the inlet side of the combustion air fan (1, 4).

Dans un appareil de chauffage de véhicule, un brûleur est alimenté en air de combustion par un ventilateur d'air de combustion et en carburant par une pompe de dosage de carburant. La chaleur générée par le brûleur dans une chambre de combustion est absorbée par un caloporteur liquide ou gazeux à travers un échangeur de chaleur qui entoure la chambre de combustion et est transmise aux endroits à chauffer. Il faut maintenir froide la pompe de dosage de carburant afin d'éviter des dérangements causés par des bulles de vapeur qui résulteraient d'un échauffement excessif. Afin de refroidir la pompe de dosage de carburant de manière efficace, celle-ci est montée de manière compacte dans un canal d'aspiration (8) du ventilateur (1) d'air de combustion. Pendant le fonctionnement de l'appareil de chauffage de véhicule, l'air de combustion coule le long de la surface extérieure de la pompe de dosage de carburant (14) et la refroidit avant de s'écouler vers le côté d'admission du ventilateur d'air de combustion (1, 4).

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