Electric heating – Heating devices – With power supply and voltage or current regulation or...
Patent
1997-02-05
1998-11-03
Paschall, Mark H.
Electric heating
Heating devices
With power supply and voltage or current regulation or...
219505, 219539, 219544, 338319, 338 22R, H05B 102
Patent
active
058312510
ABSTRACT:
A heater unit 1 has a plurality of flat heaters 11 adjacently arranged side by side and having common upper and lower surfaces. The thickness T of the heaters 11 is substantially uniform. Each heater 11 has an adjacent end surface 111 which faces toward an adjacent end surface 111 of the adjacent heater 11. The heater unit 1 also has upper and lower electrodes 21 holding the heaters 11 and respectively attached to the upper and lower surfaces of the heaters 11. The adjacent end surfaces 111 of the heaters 11 adjoining each other, and the upper and lower electrodes 21 form an air gap 12 therebetween. The creepage distance L along each adjacent end surface 111 is larger than the thickness T of the heaters 11. The dielectric strength of the heater unit 1 depends on the creepage distance L. The thickness T of the heaters 11 can be decreased without decreasing the dielectric strength of the heater unit 1. The output of the heater unit 1 increases when the thickness T is decreased.
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patent: 4841127 (1989-06-01), Prager et al.
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patent: 5059767 (1991-10-01), Marks et al.
Akiyama Yosinori
Oya Yasuhiro
Tsujimura Yasuaki
Yamada Keiichi
Denso Corporation
Paschall Mark H.
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