Vehicle heating appliance with water pump venting

Details Vehicle heating appliance with water pump venting Vehicle heating appliance with water pump venting

B - Operations, Transporting

60

H

B60H 1/04 (2006.01) F04D 9/00 (2006.01) F24D 19/08 (2006.01)

Patent

CA 2170767

In a vehicle heating appliance, water is pumped as heat transfer medium through a heat exchanger that surrounds the combustion chamber. The water pump is mounted above the heat exchanger and pumps the water it axially receives into the heat exchanger through a tangential pump outlet pipe. To vent the pump, a connection hole with a small cross-section is provided in the top area of the pump part of the water pump. The connection hole leads to the system flow pipe. Any air bubbles accumulated in the pump chamber of the pump part reach the flow pipe through the connection hole, propelled by their own ascending force and helped by the geometric arrangement of the pump chamber and return pipe, including the connection hole, and/or additionally by the pressure difference between the pump chamber and the return pipe.

Dans un appareil de chauffage de véhicules, l'eau qui sert de caloporteur est pompée dans un échangeur de chaleur (2) qui entoure la chambre de combustion (B). La pompe à eau (6) est montée au-dessus de l'échangeur de chaleur (2) et pompe l'eau qu'elle reçoit dans le sens axial à travers une tubulure tangentielle de sortie (12) jusqu'à l'échangeur de chaleur (2). Afin de désaérer la pompe, un orifice de liaison (34, 36) de section transversale réduite est ménagé dans la zone supérieure de la partie de pompage (10) de la pompe à eau et mène jusqu'à la canalisation montante (30) du système. Des bulles d'air éventuelles (L) qui s'accumulent dans la chambre de pompage (38) de la partie de pompage (10) parviennent à travers l'orifice de connexion jusqu'à la canalisation montante (70) par leur propre force ascensionnelle, aidée par les rapports géométriques entre la chambre de pompage et la canalisation descendante, y compris l'orifice de liaison, et/ou en plus par la différence de pression entre la chambre de pompage et la canalisation descendante.

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