Electric heating – Heating devices – Combined with container – enclosure – or support for material...
Patent
1987-09-02
1988-10-11
Bartis, Anthony
Electric heating
Heating devices
Combined with container, enclosure, or support for material...
126362, 219306, 219312, 219316, H05B 382, F24H 120
Patent
active
047773472
ABSTRACT:
An electric water heater has a vertically disposed tank with a lower cold water inlet, an upper hot water outlet and at least one horizontally disposed elongated immersion heating element extending into the region of the tank between the inlet and the outlet. Each heating element is surrounded by an elongated closed end tubular sleeve having a plurality of lower openings distributed along the length of the sleeve below the heating element therein and a plurality of upper opening distributed along the length of the sleeve above the heating element. The total area of the upper openings is greater than the area of the lower openings to generate upon operation of the heating element an upwardly directed transverse flow of water in a direction from the lower openings to the upper openings along the entire length of the sleeve. An unrestricted external bypass conduit interconnects the upper and lower portions of the tank and together with the sleeve surrounding each heating element generating a thermosiphon effect which improves heat transfer to the water in the tank and thus the heat recovery rate.
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Bartis Anthony
Kaser Bruce A.
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