Induction Heating Coil Positioning in Cylindrical Can Body
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Solution Overview
Problem
Existing induction heating catalyst devices face challenges with complex electrical wiring structures and inadequate insulation due to condensed water exposure, which complicates the activation of catalysts in exhaust gas purification systems.
Innovation Solution
A cylindrical can body with an embedded or externally positioned induction heating coil, housed within an insulating and shielding structure, simplifies electrical wiring connections and enhances insulation by preventing water exposure, allowing for effective induction heating of a honeycomb structure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the coil is arranged inside a metal tube together with the catalyst support, then induction heating function is achieved, but the structure of electrical wiring becomes complex and insulation becomes insufficient due to condensed water
Solution Approach 1:
The coil is extracted from the interior of the metal tube and repositioned on the outer circumferential surface. This separation removes the coil from the humid environment inside the tube where condensed water causes insulation problems, while maintaining the induction heating function through the tube wall.
Solution Approach 2:
The metal tube wall acts as an intermediary medium that transmits the magnetic field from the externally positioned coil to the catalyst support inside the tube, enabling induction heating without direct contact between the coil and the humid internal environment.
2Temperature
If the coil is arranged inside a metal tube, then induction heating is achieved, but electrical wiring insulation is compromised by condensed water from exhaust gas
Solution Approach 1:
The coil is extracted from the humid environment inside the metal tube and positioned externally, eliminating its exposure to condensed water from exhaust gas while preserving its ability to heat the catalyst through the tube wall.
Solution Approach 2:
The metal tube, which originally posed a barrier to magnetic field penetration, is utilized as a beneficial medium that both protects the externally positioned coil from condensed water and allows the magnetic field to pass through for effective catalyst heating.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This design improves insulation and simplifies electrical connections, ensuring efficient induction heating and maintaining the structural integrity of the honeycomb catalyst, enhancing the purification of exhaust gases before reaching the activating temperature.
Implementation Method 1
a coil for induction-heating the honeycomb structure
Implementation Method 2
an electric current is passed through the coil to subject the catalyst support to induction heating
Implementation Method 3
an electric current is passed through the coil to subject the catalyst support to induction heating
Data Source
AI summary
A cylindrical can body capable of housing a honeycomb structure therein, the cylindrical can body including: a coil for induction-heating the honeycomb structure; a cylindrical member made of an insulating material; and a cylindrical metal member capable of housing the coil and the cylindrical member therein, wherein, in a cross section parallel to an axial direction of the cylindrical member, (i) the coil is provided radially outward from an inner circumferential surface of the cylindrical member, and at least a part of the coil is embedded in the cross section of the cylindrical member; or (ii) the coil is provided on an outer circumferential portion of the cylindrical member.