Non-Circular Aerosol Cartridge Layout for Faster Susceptor Heating
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Solution Overview
Problem
Existing aerosol-generating systems face challenges in achieving efficient energy use and rapid heating of heating elements, as well as effective supply of liquid aerosol-forming substrates to the heating element.
Innovation Solution
The design of a cartridge with a non-circular cross-section trunk assembly that includes a susceptor element aligned parallel to the direction of maximum dimension, featuring a liquid supply channel and a susceptor element within the inner airflow path, allowing efficient substrate delivery and quick heating.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If a conventional circular cross-section trunk assembly is used, then the structural design is simple, but the heating efficiency and energy transfer are insufficient
Solution Approach 1:
The patent applies asymmetry by changing the trunk assembly cross-section from a conventional circular shape to a non-circular shape. This asymmetric geometry increases the surface area in contact with the susceptor element, thereby improving heat transfer efficiency and energy utilization during aerosol generation, while accepting increased design complexity as a trade-off for enhanced performance
2Speed
If the susceptor element is not optimally aligned, then the manufacturing is simpler, but the heating speed is slower
Solution Approach 1:
The patent employs asymmetry by aligning the susceptor element parallel to the direction of maximum dimension of the non-circular trunk assembly cross-section. This specific orientation maximizes the surface area contact between the susceptor and heating elements, enabling faster heating speeds, though it requires more precise manufacturing alignment compared to symmetric configurations
Solution Approach 2:
The patent utilizes the directional properties of the non-circular cross-section by orienting the susceptor element along the direction of maximum dimension. This dimensional optimization ensures that the susceptor presents its largest surface area to the heating elements, accelerating heat transfer and reducing heating time
3Productivity
If the liquid supply channel is not optimized, then the structure is simpler, but the substrate delivery efficiency is reduced
Solution Approach 1:
The patent applies local quality by optimizing the liquid supply channel configuration specifically within the non-circular trunk assembly structure. The channel is positioned to leverage the enhanced surface area and improved airflow dynamics created by the non-circular geometry, thereby increasing substrate delivery efficiency to the heating element while incorporating targeted design features rather than overall system complexity
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 enhances energy efficiency, enables rapid heating of the heating element, and ensures effective supply of liquid aerosol-forming substrate, improving the overall performance of the aerosol-generating system.
Implementation Method 1
The heating arrangement may be an induction heating arrangement and may comprise an induction coil and a susceptor
Implementation Method 2
The heating arrangement may be an induction heating arrangement and may comprise an induction coil and a susceptor
Implementation Method 3
Upon heating to a target temperature, the aerosol-forming substrate vaporises to form an aerosol
Data Source
AI summary
A cartridge for an aerosol-generating device is provided, the cartridge including: a longitudinal axis extending between a proximal end and a distal end of the cartridge; an inner airflow path extending between the proximal end and the distal end; a liquid storage portion configured to hold a liquid aerosol-forming substrate; and a trunk assembly circumscribing at least a portion of the inner airflow path and including a non-circular cross-section perpendicular to the longitudinal axis, the non-circular cross-section including a direction of maximum dimension, the trunk assembly further including a susceptor element having at least one planar major surface, and the susceptor element being arranged within the inner airflow path such that the at least one planar major surface of the susceptor is aligned in parallel to a plane defined by the direction of maximum dimension and the longitudinal axis.