Flow-through tankless water heater with flow switch and...

H - Electricity – 05 – B

Patent

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H05B 3/60 (2006.01) F24H 9/20 (2006.01)

Patent

CA 2240992

A very compact tankless heater delivers heat in proportion to demand. A flow responsive valve energizing an electrical control system is purely flow responsive, even to minute flow, and consumes no power when dormant. An uncomplicated electronic control system is connected to power by the flow switch, and is substantially deenergized when dormant. Most electronic components of the control system are mounted on the flat front wall of the pressure vessel. Thus, overall dimensions are minimized, cool water serves as a heat sink, and heat generated by electronic controls is captured for heating purposes. In particular, triacs controlling the heating elements are cooled, thus prolonging their life. A preferred embodiment of the novel heater has a maximum electrical consumption of 22 kilowatts, with equivalent heat output, and has overall external dimensions of 24 in height, 5.5 inches in width, and 4 inches in depth (61 cm in height, 14 cm in width, and 10 cm in depth). An outlet pipe fitting extending above adds approximately 2 inches (5 cm) to the overall height, enabling the water heater to be installed in a typical building interior wall of partition.

Chauffe-eau compact sans réservoir produisant de la chaleur à la demande. Une vanne (24) excitant un système de commande électrique est entièrement sensible à l'écoulement, même à un écoulement ténu. Ce système ne consomme pas de courant quand il est en veille. Un système de commande électronique simple est relié à l'alimentation en courant par l'interrupteur d'écoulement (16) et n'est pas excité quand il est en veille. La plupart des composants électroniques de ce système de commande sont montés sur la paroi avant plate du réservoir de pression (12), ce qui limite au maximum les dimensions générales. L'eau froide sert de dissipateur de chaleur et la chaleur générée par les commandes électroniques est captée à des fins de chauffe. En particulier, les triacs (82) commandant les éléments de chauffe (21) sont refroidis, ce qui prolonge leur durée de vie. Ce chauffe-eau peut être dimensionné dans le but d'être monté dans une cloison intérieure classique de bâtiment.

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