Glass Connecting Portion for Aerosol Heating Insulation
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Solution Overview
Problem
Existing aerosol generating devices face challenges in efficiently heating aerosol forming substrates while minimizing heat loss and preventing the outer surfaces from becoming excessively hot, which can reduce battery life and user comfort.
Innovation Solution
A heating apparatus with a dual-walled insulator configuration, where a glass connecting portion effectively prevents heat loss by reducing thermal conduction between the inner and outer walls, thereby enhancing thermal insulation and reducing heat transfer to the outer surfaces.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If a heater is used to heat the aerosol forming substance in the heating chamber, then the aerosol generation function is achieved, but the outer surfaces of the device become unacceptably high in temperature
Solution Approach 1:
The device is divided into distinct thermal zones: an inner heating chamber where high temperature is required for aerosol generation, and an outer housing where low temperature is required for user comfort. The vacuum insulation layer creates a thermal boundary that segments these zones, allowing the inner chamber to reach high temperatures while the outer surfaces remain cool to the touch.
2Volume of moving object
If the heater is positioned close to the outer surfaces to improve device compactness, then the device size is reduced, but heat loss to the external environment increases
Solution Approach 1:
A vacuum insulation layer is introduced as an intermediary between the inner heating chamber and the outer housing. This vacuum layer acts as a thermal barrier that prevents heat conduction and convection, allowing the heater to be positioned closer to the outer surfaces while maintaining thermal efficiency and preventing energy loss to the external environment.
3Loss of energy
If vacuum insulation is used to thermally insulate the heating chamber, then heat loss is reduced, but the device complexity increases
Solution Approach 1:
The vacuum insulation is implemented using thin-walled cylindrical structures - an inner heating chamber and an outer housing - with a vacuum space between them. This approach provides effective thermal insulation while maintaining a compact and relatively simple overall structure, avoiding the need for bulky insulation materials or complex multi-layer constructions.
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 use of a glass connecting portion in the heating apparatus significantly improves heating efficiency, reduces undesired heat loss, and extends battery life by maintaining lower outer surface temperatures, enhancing user comfort and device performance.
Implementation Method 1
the glass connecting portion can effectively prevent heat loss from the heating zone by preventing conduction of thermal energy created by the heater from the inner wall to the outer wall
Implementation Method 2
the heating zone is insulated by an insulating space provided between the inner wall and the outer wall
Data Source
AI summary
A heating apparatus for an aerosol generating device includes: an inner wall defining a heating zone and an opening through which an aerosol forming substance can be received in the heating zone; a heater arranged on the inner wall and configured to provide heat to an aerosol forming substance that is received in the heating zone; an outer wall positioned radially outwardly with respect to the inner wall; and a glass connecting portion connecting the inner wall and the outer wall.