Heating element for water heaters with scale control

Details Heating element for water heaters with scale control Heating element for water heaters with scale control

1998-11-06

1999-08-24

Walberg, Teresa

Electric resistance heating devices

Heating devices

Immersion heater details

392451, 392457, 219481, H05B 340, H05B 302

Patent

active

059434759

ABSTRACT:
An improvement in electrical elements for a water heater includes a mass attached to the element for reducing the deposition of hard water scale on element surfaces, particularly in the return bend areas. In one embodiment, a flow accelerator tube encloses the element. The flow accelerator tube has an inlet at one end and an outlet at a higher elevation at the opposite end. Water is induced to flow through the tube because of temperature change. In another embodiment, a solid mass with high surface area encloses the return bend areas to increase heat transfer at a lower temperature to reduce scaling and increase element life.

REFERENCES:
patent: 5293446 (1994-03-01), Owens et al.
patent: 5774627 (1998-06-01), Jackson

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