Far-infrared electric heater

Electric resistance heating devices – Heating devices – Radiant heater

Patent

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Details

392407, 392408, 392488, 219553, 219546, 219534, 219544, A45D 2040, H05B 310

Patent

active

059076631

ABSTRACT:
Disclosed is a far-infrared electric heater mainly including an electric heating coil, an inner element set in the heating coil, and an outer tubular member enclosing and insulating the heating coil and the inner element. The inner element is made by mixing and sintering quartz and far-infrared optical material. Continuous teeth are provided on outer surface of the inner element and/or inner surface of the outer tubular member to increase surface area for enhancing the reflection of the radiant far-infrared rays, so that an object can be heated by the electric heater in a highly efficient manner.

REFERENCES:
patent: 3716693 (1973-02-01), Bleckmann
patent: 4412126 (1983-10-01), Brockway
patent: 4621182 (1986-11-01), Driggers
patent: 4774396 (1988-09-01), Salit et al.
patent: 5077461 (1991-12-01), Hasegawa
patent: 5212763 (1993-05-01), Arnold et al.

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