Aerosol Substrate Air-Hole Layout for Uniform Heating and Draw
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Solution Overview
Problem
Aerosol generating substrates in heated aerosol generating articles face challenges with difficulty in inhalation and inconsistent heating due to uneven heating and mass distribution.
Innovation Solution
The aerosol generating substrate is designed with air holes of at least two cross-sectional shapes that pass through the substrate, allowing for flexible adjustment of flow resistance and mass distribution, enhancing heating uniformity and reducing scorching by ensuring even aerosol release.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the aerosol generating substrate is heated to release aerosol, then aerosol generation is achieved, but heating uniformity is poor and scorching occurs
Solution Approach 1:
The substrate is segmented into multiple air holes with different cross-sectional shapes (circular, triangular, rectangular, etc.) to divide the heating area into distinct zones. Each shape creates different airflow patterns and heat distribution characteristics, preventing localized overheating and scorching while maintaining consistent aerosol generation across the entire substrate surface.
Solution Approach 2:
Different regions of the substrate have air holes with specifically designed cross-sectional shapes tailored to local heating requirements. This local quality variation ensures that each area of the substrate receives appropriate heat distribution, improving overall heating uniformity while preventing scorching in vulnerable regions.
2Reliability
If air holes are added to the substrate, then heating uniformity and aerosol release consistency are improved, but device complexity increases
Solution Approach 1:
The substrate utilizes a porous structure with air holes of varying cross-sectional shapes integrated into the material itself. This porous design naturally promotes uniform heat distribution and consistent aerosol release without requiring additional complex components, as the structural complexity is inherent to the material design rather than assembled from multiple parts.
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 design improves heating uniformity and aerosol release consistency, providing a better inhalation experience by adjusting flow resistance and substrate mass distribution, thus ensuring even aerosol generation.
Implementation Method 1
allowing for flexible adjustment of flow resistance and mass distribution
Implementation Method 2
an aerosol former that can be evaporated when heated to generate an aerosol
Data Source
AI summary
An aerosol generating substrate includes: a plurality of air holes of at least two cross-sectional shapes, air holes of the plurality of air holes being formed inside the aerosol generating substrate and passing through at least one end of the aerosol generating substrate along a length direction. In an embodiment, the air holes pass through two opposite ends of the aerosol generating substrate along the length direction. The aerosol generating substrate is divided into a middle part and an edge part, the edge part surrounding the middle part. A first group of air holes of the plurality of air holes is arranged in the middle part. A second group of air holes of the plurality of air holes is arranged in the edge part. Cross-sectional shapes of the air holes in the first group of air holes are the same.