Electric heating element support structure and automobile exhaust gas purification device using the structure

Abstract

The invention discloses an electric heating element supporting structure and a car waste gas purification device using the same. The electric heating element supporting structure comprises a plurality of supporting elements between a metal catalyst carrier and a heating core body, and the multiple supporting elements are evenly distributed along the heating core body at intervals. The supporting elements comprise insulation sleeve pipes inserted and fixed in the heating core body alternately in the forward and reverse directions and pins inserted and fixed in the insulation sleeve pipes in the forward direction. The car waste gas purification device is provided with an airtight shell which comprises a barrel-shaped middle section and a cone gradually shrinking from the front end and the rear end of the middle section to the outside, and an electric heating element and the metal catalyst carrier are sequentially arranged in the middle section of the shell in the waste gas flowing direction. In this way, the electric heating element supporting structure can be simply, conveniently and effectively supported between the electric heating element and the metal catalyst carrier carrying the heating element, the shape of the heating core body is effectively fixed, good supporting performance and insulation performance are achieved, the manufacturing cost is low, and the process is simple.

Description

technical field [0001] The invention relates to the technical field of environmental protection devices, in particular to an electric heating element support structure and an automobile exhaust gas purification device using the structure. Background technique [0002] Due to the tightening of the limit value of automobile emission standards, catalytic conversion technology has been widely used as an effective purification method. The conversion efficiency of the current catalytic converters for the three pollutants is generally above 90% (after the metal catalytic converter is fully ignited) , and 70% to 80% of the three pollutants (HC, CO, NOX) of the vehicle are produced in the cold start stage. For example, under the test cycle of FTP75, the emissions of the three pollutants HC, CO, and NOX in the cold start stage account for 84%, 83%, and 51% of the entire cycle. In order to meet the requirements of new emission regulations, reducing vehicle cold start emissions has bec...

AI Technical Summary

Problems solved by technology

Such a solution is known at present: the shell of the insulating support device in the prior art is a metal capillary, and the metal capillary passes through the tooth gap of the electric heating element and is welded and fixed thereto, so the outer diameter of the metal capillary cannot be too large, otherwise it cannot pass through the tooth gap of the heating element

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