Honeycomb heater

Details Honeycomb heater Honeycomb heater

1993-08-06

1995-03-21

Evans, Geoffrey S.

Electric heating

Heating devices

With heating unit structure

60300, 422174, H05B 310, F01N 310, B01D 5336

Patent

active

053998413

ABSTRACT:
A heating element for heating fluid flowing therethrough includes: a honeycomb structure having a periphery and two ends, including a plurality of passages which are defined by partition walls and extend in an axial direction between the ends, the honeycomb structure being composed of an electrically conductive material; and a pair of electrodes for applying electric current to the honeycomb structure so as to generate heat; wherein a maximum length of linear portions of the partition walls is up to 10 mm as viewed in a cross-section of the honeycomb structure taken perpendicular to the axial direction, and a number of the passages in one square inch ranges from 50 to 800 as viewed in the cross-section of the honeycomb structure, thereby insuring improved thermal shock resistance and purification efficiency. The partition walls are less prone to deformation and crack formation due to thermal stress.

REFERENCES:
patent: 4740408 (1988-04-01), Mochida et al.
patent: 5063029 (1991-11-01), Mizuno et al.
patent: 5194229 (1993-03-01), Abe et al.
patent: 5200154 (1993-04-01), Harada et al.
patent: 5202547 (1993-04-01), Abe et al.
patent: 5229079 (1993-07-01), Harada et al.
patent: 5229080 (1993-07-01), Abe et al.
patent: 5245825 (1993-09-01), Ohhashi et al.
patent: 5266278 (1993-11-01), Harada et al.

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