Resistive Heating Coating for Uniform Aerosol Substrate Heating
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Solution Overview
Problem
Conventional aerosol-generating devices face challenges with complex and expensive heating elements that predominantly heat the center of the aerosol-generating substrate, leading to non-uniform heating and potential electromagnetic interference.
Innovation Solution
The use of an electrically resistive coating as a heating element applied to the sidewall of the heating chamber, which allows for more even heat distribution, reduces electromagnetic interference, and can be applied in various shapes, including irregular forms, using methods like APCVD or powder sintering, and is combined with a substrate for enhanced energy efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If a conventional heating element is used, then heating function is provided, but the heating is non-uniform and electromagnetic interference occurs
Solution Approach 1:
The patent replaces the conventional coil-shaped heating element with a resistive coating applied to the heating chamber wall. This substitution eliminates electromagnetic interference by using a distributed resistive heating mechanism instead of concentrated coil heating, while achieving more uniform temperature distribution across the aerosol-generating substrate.
Solution Approach 2:
The patent changes the heating mechanism from concentrated coil heating to distributed resistive coating heating. This parameter change in the heating element configuration transforms the heating pattern from non-uniform to uniform, and eliminates electromagnetic interference while maintaining effective heating function.
2Power
If a coil-shaped heating element is used, then heating is achieved, but electromagnetic interference is generated
Solution Approach 1:
The patent replaces the mechanical coil-shaped heating element with a resistive coating system. This substitution maintains the heating power function while eliminating electromagnetic interference, as the distributed coating approach does not generate significant electromagnetic fields.
3Temperature
If a heating blade penetrates the substrate, then heating is achieved, but complex structure and high cost are required
Solution Approach 1:
The patent extracts the heating function from the complex penetrating blade structure and implements it through a simple resistive coating applied to the heating chamber wall. This simplifies the overall device structure while maintaining effective heating capability.
Solution Approach 2:
The patent substitutes the mechanical penetrating blade heating system with a resistive coating system. This replacement reduces structural complexity and manufacturing cost while achieving comparable or superior heating effectiveness through uniform heat distribution.
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 electrically resistive coating provides uniform heating, reduces electromagnetic interference, and enhances energy efficiency by operating at lower temperatures, minimizing residue escape and contamination within the heating chamber.
Implementation Method 1
The heating element is an electrically resistive coating
Data Source
AI summary
A portable battery-powered aerosol-generating device for generating an inhalable aerosol is provided, the portable battery-powered aerosol-generating device including a heating element, the heating element including electrically resistive particles and a polymer binder, and the electrically resistive particles being embedded in the binder. A heating element for the portable battery-powered aerosol generating device is also provided.