Aerosol Rod Cavity for Consistent Heating
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Solution Overview
Problem
Current non-combustible aerosol provision systems face challenges in efficiently generating and delivering aerosols from aerosol-generating materials without combustion, particularly in maintaining consistent aerosol production and minimizing material displacement during heating.
Innovation Solution
A rod-shaped aerosol-generating article with a cavity extending from its distal end, lined with a material layer that can be heated, featuring a varying density of air apertures and a cooling segment to enhance aerosol generation and delivery, is used within a non-combustible aerosol provision device. The article can be manufactured through extrusion or molding processes, incorporating a heating element that is inductively heated or conductively heated, ensuring consistent aerosol production.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a solid rod of aerosol-generating material is used without a cavity, then the structure is simple and manufacturing is easy, but the heating element cannot be properly positioned and aerosol generation is inconsistent
Solution Approach 1:
The solid rod is segmented by removing material to create a central cavity, dividing the structure into an outer aerosol-generating material layer and an inner cavity space. This segmentation allows the heating element to be properly positioned within the cavity while maintaining structural integrity for consistent aerosol generation.
Solution Approach 2:
The cavity is nested within the rod of aerosol-generating material, creating a concentric structure where the heating element can be inserted into the central cavity. This nested arrangement ensures proper positioning of the heating element while maintaining the outer layer for aerosol generation.
2Reliability
If the cavity is lined with a material layer, then the heating element can be embedded and aerosol generation is improved, but the manufacturing process becomes more complex
Solution Approach 1:
The material layer lining the cavity is designed with a porous structure containing an array of air apertures. This porous structure allows efficient air flow for aerosol generation while the layer itself provides thermal insulation and structural support for the embedded heating element.
Solution Approach 2:
The article uses a composite structure combining the outer aerosol-generating material with an inner material layer lining the cavity. This composite construction allows the heating element to be embedded effectively while maintaining manufacturing feasibility through coordinated extrusion or molding processes.
3Productivity
If air apertures are distributed uniformly throughout the heating element, then manufacturing is simple, but aerosol generation efficiency is reduced
Solution Approach 1:
The air apertures are distributed non-uniformly within the material layer, with varying density in different regions. This local quality variation optimizes aerosol generation efficiency by concentrating air flow where needed while maintaining structural integrity in other areas.
Solution Approach 2:
The density and distribution of air apertures are varied as a parameter to optimize aerosol generation. By changing the aperture distribution from uniform to non-uniform, the system achieves higher aerosol generation efficiency while managing the complexity of manufacturing.
4Reliability
If the cavity extends the full length of the rod, then the heating element is well-positioned, but the structural integrity of the aerosol-generating material is reduced
Solution Approach 1:
The material layer lining the cavity acts as a flexible structural shell that maintains the integrity of the aerosol-generating material while allowing the cavity to extend through the material. This thin film structure provides necessary strength while enabling proper heating element positioning.
Solution Approach 2:
The composite structure of the outer aerosol-generating material layer and inner material layer lining provides both structural integrity and cavity space for the heating element. This composite construction allows full-length cavity extension without compromising the overall strength of the article.
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 solution ensures consistent and improved aerosol generation by minimizing material displacement and maintaining a consistent packing density, resulting in enhanced aerosol delivery and user experience.
Implementation Method 1
The material layer may comprise a heating element. If the material layer comprises a heating element it may be configured to be conductively, or inductively, heated.
Implementation Method 2
If the material layer comprises a heating element it may be configured to be conductively, or inductively, heated.
Implementation Method 3
A cooling segment may be located between the aerosol-generating material and the mouth end.
Data Source
AI summary
An article for use in an aerosol provision system includes a rod of aerosol generating material having a distal end, and a cavity that extends into the rod of aerosol generating material from the distal end. The invention also includes a system having a non-combustible aerosol provision device, and the article for insertion into the non-combustible aerosol provision device. A method of manufacturing the article including a rod of aerosol-generating material includes extruding the aerosol-generating material through a die head and over a mandrel to form a cavity extending through the aerosol-generating material.