Magnetic Shielded Vacuum Insulation for Induction Aerosol Heating
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Solution Overview
Problem
The existing metallic vacuum heat insulation equipment for electromagnetic induction-type heating devices generates heat under magnetic induction, compromising the heat insulation effect.
Innovation Solution
A heat insulation mechanism for aerosol generation devices, featuring a magnetic field shield to isolate the heat insulator from the varying magnetic field, preventing the heat insulator from generating heat and maintaining effective insulation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If metallic vacuum heat insulation equipment is used for electromagnetic induction-type heating devices, then heat insulation strength is improved, but the heat insulator itself generates heat under magnetic induction, worsening heat insulation effect
Solution Approach 1:
The heat insulation system is divided into multiple layers: an inner non-metallic heat insulator layer that contacts the susceptor and an outer metallic vacuum heat insulation layer. This segmentation allows each layer to perform its specific function without interference - the non-metallic inner layer avoids magnetic induction heating while the metallic outer layer provides structural strength and vacuum insulation.
Solution Approach 2:
A non-metallic heat insulator material is introduced as an intermediary layer between the susceptor (heating element) and the metallic vacuum heat insulation structure. This intermediary prevents the metallic heat insulator from directly contacting the magnetic field and susceptor, thereby eliminating the problem of magnetic induction heating in the heat insulator itself.
2Strength
If metallic materials are used for vacuum heat insulation tube wall, then structural strength is improved, but magnetic field penetration causes heat generation in the heat insulator
Solution Approach 1:
The tube wall structure is segmented into multiple layers with different material properties. The inner layer uses non-metallic materials (such as ceramic or polymer) that are immune to magnetic induction, while the outer layer can use metallic materials for structural strength. This segmentation resolves the contradiction between strength and temperature control.
Solution Approach 2:
Different regions of the heat insulation structure use different materials optimized for their specific functions. The region closest to the magnetic field (inner layer) uses non-metallic materials with magnetic field resistance, while outer regions use metallic materials for structural support. This local differentiation of material quality eliminates heat generation in the heat insulator while maintaining overall structural strength.
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 proposed solution effectively shields the vacuum heat insulation tube from the magnetic field, preventing it from heating up and thus maintaining a good heat insulation effect.
Implementation Method 1
a susceptor, which is configured to be penetrated by the varying magnetic field to generate heat
Implementation Method 2
a magnetic field shield, which is configured to isolate the heat insulator from the varying magnetic field
Implementation Method 3
a heat isolation tube having a vacuum central region
Implementation Method 4
configured to prevent conduction or diffusion of heat towards the surface of the device
Data Source
AI summary
A heat insulation mechanism suitable for an electromagnetic induction-type aerosol generation device and an aerosol generation device are provided. The aerosol generation device comprises a magnetic field generator and a susceptor that are inductively coupled; a heat insulator configured to reduce conduction of heat from the susceptor to the outside, the heat insulator comprising a tube wall, and a central region defined by the tube wall, the tube wall containing a metal or an alloy, and the pressure in the central region being configured to be lower than the pressure outside the heat insulator; and a magnetic field shield, configured to isolate the heat insulator from a varying magnetic field, so as to prevent the heat insulator from being penetrated by the varying magnetic field to generate heat. The aerosol generation device can shield the vacuum heat insulator from the magnetic field as far as possible.