Electric heating device

Details Electric heating device Electric heating device

2007-05-18

2008-11-25

Paik, Sang Y (Department: 3742)

Electric resistance heating devices

Heating devices

Convection space heater

C392S360000

Reexamination Certificate

active

07457533

ABSTRACT:
An electric heating device including a fan for moving a volume of air at a rate substantially corresponding to a speed of rotation of the fan, and a fan motor for rotating the fan over a range of speeds. The device also has a heat generator with one or more PTC elements for generating heat, and for transferring the heat to the moving volume of air. In addition, the device has a control subassembly adapted for proportionate control of the fan motor based on a variable required heat output so that the rate of movement of the moving volume of air varies in proportion to changes in the required heat output.

REFERENCES:
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patent: 4302663 (1981-11-01), Chesnut et al.
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patent: 6973260 (2004-12-01), Orr et al.
patent: 6897416 (2005-05-01), Bohlender et al.
Product Sheet, PTC Finned Resistor Heating Element, Type B34-96-3, Backer BHV AB, Sweden.

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