Electrical resistance heating element with a honeycomb body

Details Electrical resistance heating element with a honeycomb body Electrical resistance heating element with a honeycomb body

2006-04-25

2006-04-25

Campbell, Thor S. (Department: 3742)

Electric resistance heating devices

Heating devices

Continuous flow type fluid heater

C392S491000, C392S502000

Reexamination Certificate

active

07035533

ABSTRACT:
The aim of the invention is the application of simple production methods for electrical resistance heating elements with a honeycomb body and use total capacity with regard to the specific electrical power per volume unit. Said aim is achieved for an electrical resistance heating element with a honeycomb body of resistance material with positive temperature coefficients for the resistance (PTC resistance), in which the channels, for throughflow of a medium for heating, comprise metallised walls and are electrically alternately contacted after the fashion of a chess-board on the front faces of the honeycomb body by means of a front face metallisation, whereby an insulation region (1) is alternately let into the metallisation (3) on the walls of the channels running from the front faces, whilst the front face metallisation (2) completely covers the front faces. Possible fields of application for the above (without limitation thereto) are particularly additional heaters and windscreen heaters in motor vehicles or small, self-regulating and rapidly-responding room space heaters.

REFERENCES:
patent: 4107515 (1978-08-01), Kulwicki
patent: 4180901 (1980-01-01), Kulwicki
patent: 4264888 (1981-04-01), Berg
patent: 4570046 (1986-02-01), Melanson et al.
patent: 4717813 (1988-01-01), Berg et al.
patent: 4866365 (1989-09-01), Offiler et al.
patent: 30 16 725 (1980-11-01), None
patent: 2-129887 (1990-05-01), None
patent: 198 04496 (1999-08-01), None
Mar. 2000 “PTC Finned Resistor Heating Elements” DBK David + Bader GmbH.

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