Heating system

Details Heating system Heating system

2008-01-29

2008-01-29

Paschall, Mark (Department: 3742)

Electric heating

Heating devices

With power supply and voltage or current regulation or...

C219S505000, C219S539000, C219S548000, C219S552000, C338S0220SD

Reexamination Certificate

active

07323664

ABSTRACT:
A heating system includes a plurality of radiant heaters, a power source supplying electricity to the radiant heaters, and a transformer provided between the radiant heaters and the power source, wherein each of the radiant heaters includes a support plate substantially having a rectangular shape, a pair of connection terminals substantially perpendicularly extending, while having a space therebetween, from one surface of the support plate, and a strip-shaped heater element arranged between the pair of connection terminals and covering the one surface of the support plate, wherein voltage E between the pair of connection terminals is adjusted by the transformer so as to satisfy an inequality of 25 V≦E≦35 V, wherein a width W of the strip-shaped heater element is set so as to satisfy an inequality of 8.5 mm≦W≦11.7 mm, and a thickness t thereof is set so as to satisfy an inequality of 0.05 mm≦t≦0.8 mm, and wherein the radiant heaters are connected to the transformer in a 3-phase and 4-wire configuration, a neutral line is connected to ones of the connection terminals, and one of a U-phase, V-phase, and W-phase of a secondary side of the transformer is connected to the others of the connection terminals.

REFERENCES:
patent: 4766365 (1988-08-01), Bolduc et al.
patent: 5574418 (1996-11-01), Matsumura
patent: 2007/0096278 (2007-05-01), Nakatsu et al.
patent: 2002-260831 (2002-09-01), None

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