Inductor Coil Magnetic Shielding for Cooler Aerosol Heating
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Solution Overview
Problem
Existing aerosol provision devices face challenges in effectively shielding electrical components from electromagnetic radiation generated by inductor coils while maintaining a safe surface temperature for user comfort and safety.
Innovation Solution
Incorporation of a magnetic shield member formed from ferrite material, which is in contact with the inductor coil and extends partially around it, reducing the amount of ferrite material needed and creating a thermal barrier to maintain the outer surface temperature below 48°C.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a magnetic shield member is used to shield electromagnetic radiation from the inductor coil, then the shielding effectiveness is improved, but the device complexity increases
Solution Approach 1:
The magnetic shield member serves dual functions: it shields electromagnetic radiation from the inductor coil and acts as a thermal barrier to maintain safe outer surface temperature. This multi-functionality reduces the need for separate shielding and thermal management components, thereby improving shielding effectiveness without proportionally increasing device complexity
Solution Approach 2:
The magnetic shield member is positioned within the device structure, extending at least partially around the inductor coil and nested between the coil and the outer housing. This nested arrangement integrates the shielding function into the existing device architecture rather than adding external components, thus improving shielding while minimizing complexity increase
2Use of energy by moving object
If the inductor coil is used to heat the susceptor, then the heating efficiency is improved, but the outer surface temperature increases
Solution Approach 1:
The magnetic shield member acts as a thermal intermediary between the heated susceptor/inductor coil assembly and the outer housing. It intercepts and redirects heat away from the outer surface, allowing efficient heating of the susceptor while maintaining the outer surface temperature below 48°C, thus resolving the contradiction between heating efficiency and surface temperature control
3Object-affected harmful factors
If ferrite material is used for the magnetic shield member, then the electromagnetic radiation shielding is improved, but the weight of the device increases
Solution Approach 1:
The magnetic shield member is positioned specifically around the inductor coil where electromagnetic radiation is generated, rather than enclosing the entire device. This localized shielding approach uses ferrite material only where necessary for effective radiation blocking, improving shielding effectiveness while minimizing the total amount of heavy material and thus limiting weight increase
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 magnetic shield member effectively shields electromagnetic radiation and reduces the outer surface temperature by up to 3°C, enhancing user safety and comfort by maintaining the device's surface temperature within a safe range.
Implementation Method 1
an inductor coil extending around the receptacle, wherein the inductor coil is configured to generate a varying magnetic field for heating the susceptor
Implementation Method 2
a magnetic shield member extending at least partially around the inductor coil
Implementation Method 3
reducing the amount of ferrite material needed and creating a thermal barrier to maintain the outer surface temperature below 48°C
Data Source
AI summary
An aerosol provision device is provided. The device comprises a receptacle configured to receive aerosol generating material, wherein the aerosol generating material is heatable by a susceptor. The device further comprises an inductor coil extending around the receptacle, wherein the inductor coil is configured to generate a varying magnetic field for heating the susceptor. The device further comprises a magnetic shield member extending at least partially around the inductor coil.