Aerosol Article With Internal Susceptor Heating for Consistency
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Solution Overview
Problem
Existing aerosol-generating articles and systems with internal heating elements face inefficiencies in heating aerosol-generating substrates due to reduced direct contact and increased thermal resistance, leading to inconsistent aerosol generation and unacceptable draw resistance.
Innovation Solution
The use of an aerosol-generating article with an aerosol-generating substrate having a density of 100-700 mg/cm³ and an elongate internal heating element with a width ratio of 0.05 to 4 to the substrate width, ensuring direct contact and efficient heating without excessive draw resistance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If an internal heating element is used to heat the aerosol-generating substrate, then heating efficiency is improved, but direct contact between the heating element and substrate is reduced leading to increased thermal resistance
Solution Approach 1:
The aerosol-generating substrate is divided into multiple strands arranged in a bundled configuration. This segmentation increases the total surface area contact points between the internal heating element and the substrate, improving thermal contact consistency while maintaining heating efficiency through distributed heat transfer across multiple contact interfaces.
2Productivity
If the aerosol-generating substrate has high density to improve heating efficiency, then aerosol generation is enhanced, but draw resistance becomes unacceptable
Solution Approach 1:
The substrate is configured with varying local densities through the stranded bundled structure. The strands provide high density regions for efficient heating and aerosol generation, while the spaces between strands create low density regions that reduce overall draw resistance. This local quality variation allows simultaneous optimization of both parameters.
3Reliability
If direct contact between heating element and substrate is maximized, then heating consistency is improved, but manufacturing complexity increases
Solution Approach 1:
The internal heating element and aerosol-generating substrate are merged into a single integrated assembly where the heating element is positioned within the bundled substrate structure. This merging ensures consistent thermal contact through the stranded configuration while simplifying manufacturing by combining two components into one pre-assembled unit that requires minimal additional assembly steps.
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
This configuration allows for more efficient and consistent heating of the aerosol-generating substrate, maintaining an acceptable resistance to draw, thereby improving aerosol generation efficiency.
Implementation Method 1
Where an internal heating element is in direct contact with an aerosol-generating substrate, initial heating of portions of the aerosol-generating substrate that are in direct contact with the internal heating element will be effected primarily by conduction.
Implementation Method 2
the alternating electromagnetic field produced by the inductor induces a current in the susceptor, causing the susceptor to heat up
Implementation Method 3
Electrically-operated aerosol-generating devices comprising an inductor configured to inductively heat aerosol-generating substrates of heated aerosol-generating articles are also known in the art.
Implementation Method 4
volatile compounds are released from the aerosol-generating substrate by heat transfer from the heat source to the aerosol-generating substrate and are entrained in air drawn through the aerosol-generating article
Implementation Method 5
As the released compounds cool, they condense to form an aerosol that is inhaled by the user
Data Source
AI summary
An aerosol-generating article is provided, including an aerosol-generating section including an aerosol-generating substrate including a plurality of strands of aerosol-generating material, the aerosol-generating substrate having a density of between 100 milligrams per cubic centimetre and 700 milligrams per cubic centimetre, and an elongate internal heating element located within the aerosol-generating substrate in thermal contact with the plurality of strands of aerosol-generating material, the elongate internal heating element being a susceptor element, the aerosol-generating substrate being tobacco cut filler, and a ratio of a mean cut width of the tobacco cut filler to a width of the elongate internal heating element being between 0.05 and 4. An aerosol-generating system including the aerosol-generating article and an aerosol-generating device is also provided.