Polymeric Electromagnetic Shield for Induction Heating
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Solution Overview
Problem
Current aerosol provision devices using ferrite materials for electromagnetic shielding face challenges with flexibility, adhesion issues, and degradation over time, leading to ineffective shielding and potential loose ferrite material within the device.
Innovation Solution
A polymeric composition is used as an electromagnetic shield member, comprising a polymer and filler capable of absorbing and reflecting electromagnetic radiation, which provides structural integrity and eliminates the need for adhesives, allowing for more complex device designs and improved durability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If ferrite materials are used for electromagnetic shielding, then shielding effectiveness is achieved, but flexibility and adhesion deteriorate leading to material degradation and loose material within the device
Solution Approach 1:
The patent uses a composite material consisting of a polymeric matrix combined with conductive filler particles (such as carbon black, metal particles, or conductive polymers). This composite structure provides both electromagnetic shielding effectiveness through the conductive filler and the flexibility, adhesion, and structural stability of the polymeric matrix, eliminating the problems associated with traditional ferrite materials.
Solution Approach 2:
The patent modifies the physical and chemical parameters of the shielding material by transitioning from inorganic ferrite compounds to an organic polymeric composite system. This parameter change enables the material to exhibit both electromagnetic shielding properties (through controlled conductivity of the filler) and the mechanical properties (flexibility, adhesion, stability) required for durable device integration.
2Reliability
If ferrite materials are used for electromagnetic shielding, then shielding effectiveness is achieved, but device complexity increases due to adhesion issues and degradation over time
Solution Approach 1:
The patent merges the electromagnetic shielding function with the structural component function into a single integrated polymeric composite material. This eliminates the need for separate shielding layers, adhesives, and mounting structures that would otherwise be required, thereby reducing device complexity while maintaining shielding effectiveness.
Solution Approach 2:
The polymeric composite material serves multiple functions simultaneously: it provides electromagnetic shielding, structural support, adhesion, and flexibility. This multi-functionality reduces the overall number of components needed in the device, simplifying the overall structure while maintaining the required shielding performance.
3Object-affected harmful factors
If traditional shielding materials are used, then electromagnetic radiation is blocked, but weight and cost increase
Solution Approach 1:
The patent applies local quality by using conductive filler particles distributed throughout the polymeric matrix, creating a shielding effect only where needed. The conductivity and shielding capability are localized to the regions containing the conductive filler, rather than requiring a uniformly dense or heavy material throughout the entire shielding component, thereby reducing overall weight.
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
The polymeric composition effectively shields against electromagnetic radiation, maintains structural integrity, and reduces the risk of ferrite material degradation, resulting in a more stable and efficient aerosol provision device with lower costs and weight.
Implementation Method 1
an inductor coil configured to generate a varying magnetic field for heating the susceptor
Implementation Method 2
an inductor coil configured to generate a varying magnetic field for heating the susceptor
Implementation Method 3
the polymeric composition is configured to absorb and/or reflect electromagnetic radiation
Implementation Method 4
the polymeric composition is configured to absorb and/or reflect electromagnetic radiation
Data Source
AI summary
An aerosol provision device includes a receptacle configured to receive aerosol generating material, wherein the aerosol generating material is heatable by a susceptor; an inductor coil configured to generate a varying magnetic field for heating the susceptor; and an electromagnetic shield member at least partially covering the inductor coil, wherein the electromagnetic shield member includes a polymeric composition which is configured to absorb and/or reflect electromagnetic radiation.