Sheet-Based Aerosol Heating Assembly with Zoned Conductive Paths
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Solution Overview
Problem
Conventional heating assemblies in aerosol generating devices suffer from heat loss and the generation of harmful gases due to the proximity of electrodes to the heat generating resistance portion, which affects the atomization efficiency and user health.
Innovation Solution
A heating assembly with a sheet-like substrate and an electric conductive path arranged on its outer side, featuring a heat generating resistance portion and electrical connection portion along the length direction, with conductive electrodes and a mounting base positioned to minimize heat transfer and gas generation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If the mounting base is sleeved on the heating member adjacent to the heat generating resistance portion, then the structural support is provided, but heat loss occurs and atomization effect is reduced
Solution Approach 1:
The heating member is divided into distinct functional zones: the heat generating resistance portion for heating, the mounting base positioning portion for support, and the through hole section for thermal isolation. This segmentation allows each zone to perform its specific function without interfering with others, particularly preventing heat transfer to the mounting base while maintaining structural integrity.
Solution Approach 2:
The sheet-like substrate with through holes acts as an intermediary thermal barrier between the heat generating resistance portion and the mounting base. The through holes create thermal isolation, preventing direct heat transfer to the mounting base, while still allowing the mounting base to provide structural support at the appropriate location.
2Stability of the object's composition
If the mounting base is positioned adjacent to the heat generating resistance portion, then the structural stability is improved, but harmful gases are generated due to high temperature heating
Solution Approach 1:
The heating member is segmented into a heat generating zone and a mounting base positioning zone, separated by the through hole section. This ensures the mounting base is not exposed to high temperatures that would cause harmful gas generation, while still providing structural stability through proper positioning away from the heat source.
Solution Approach 2:
The sheet-like substrate with through holes serves as a thermal barrier (intermediary) that protects the mounting base from high temperatures. This prevents the mounting base material from decomposing and generating harmful gases, while allowing the mounting base to provide structural stability.
3Device complexity
If the electrodes are located adjacent to the heat generating resistance portion, then the electrical connection is simplified, but the temperature gradient is reduced affecting atomization performance
Solution Approach 1:
The electric conductive path is segmented into the heat generating resistance portion and the electrical connection portion, arranged along the length direction of the sheet-like substrate. The electrical connection portion is positioned away from the heat generating resistance portion, maintaining a large temperature gradient while preserving electrical connectivity through the substrate.
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
Reduces heat loss and harmful gas production, allowing for cost-effective material choices for the mounting base and enhancing energy efficiency through a larger temperature gradient, thereby improving atomization performance.
Implementation Method 1
heat generated by the heat generating resistance portion when the heat generating resistance portion is powered
Data Source
Figure 1~2
Figure 3~5
Figure 6~7
AI summary
An aerosol generating device and a heating assembly (2) thereof, comprising a heating member (21). The heating member (21) comprises a sheet-like substrate (212) and an electric conductive path (214) provided on an outer side of the sheet-like substrate (212). The electric conductive path (214) comprises a heat generating resistance portion (2141) and an electrical connection portion electrically connected to the heat generating resistance portion (2141). The heat generating resistance portion (2141) and the electrical connection portion are arranged along a length direction of the sheet-like substrate (212). Since no heating zone is provided between a second end where a mounting base (23) is located and a conductive electrode (2142), the possibility of generating harmful gas is reduced, and there can be more choices for the material of the mounting base, so that the cost is reduced. There is a large temperature gradient between the section corresponding to the heat generating resistance portion (2141) of the heating element into which the tobacco is inserted and the section corresponding to the conductive electrode (2142). The temperature of the section corresponding to the conductive electrode (2142) is relatively low, and the heating dissipation is small, which is conductive to the effective use of energy.