Aerosol-Generating Article Chamber with Protrusions and Dimples
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Solution Overview
Problem
Aerosol-generating devices face issues with heat loss, condensate formation, airflow restriction, and article displacement due to tight fits, which affect heating efficiency and user experience.
Innovation Solution
The device features a chamber with dimpled and protruded inner surfaces that minimize direct contact between the aerosol-generating article and the chamber, promoting turbulent airflow and secure retention while reducing heat transfer and condensation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the chamber is designed with a tight fit for the aerosol-generating article, then the article retention is improved, but heat loss due to direct thermal conduction increases
Solution Approach 1:
The chamber inner surface is designed with differentiated zones: a first axial portion with protrusions for secure article contact and retention, and a second axial portion with a smooth finish that minimizes thermal conduction. This local quality differentiation allows the chamber to simultaneously achieve good article retention while reducing heat loss to the chamber walls.
2Reliability
If the chamber is designed with a tight fit for the aerosol-generating article, then the article retention is improved, but condensate formation on the article increases
Solution Approach 1:
The chamber features a first axial portion with protrusions that provide secure retention contact, and a second axial portion with a smooth finish that reduces surface area for condensate formation. By localizing the contact points in the first portion and minimizing the surface area in the second portion, the design achieves reliable article retention while reducing harmful condensate formation on the article.
3Reliability
If the chamber is designed with a tight fit for the aerosol-generating article, then the article retention is improved, but airflow restriction increases
Solution Approach 1:
The chamber inner surface is designed with a first axial portion containing protrusions that contact the article for retention, and a second axial portion with a smooth finish that minimizes interference with airflow. This localized contact approach secures the article while maintaining adequate airflow channels between the article and chamber walls.
4Reliability
If the chamber is designed with a tight fit for the aerosol-generating article, then the article retention is improved, but the risk of article damage or breakage increases
Solution Approach 1:
The chamber features a first axial portion with protrusions that provide secure retention contact at specific locations, and a second axial portion with a smooth finish that eliminates excessive friction and contact pressure. This localized contact design achieves reliable article retention while reducing the risk of damage or breakage during insertion and extraction.
5Productivity
If the chamber inner surface is dimpled to promote turbulent airflow, then airflow management is improved, but the contact area with the article increases
Solution Approach 1:
The chamber is designed with a first axial portion having protrusions for article contact and retention, and a second axial portion with a dimpled surface that promotes turbulent airflow. By concentrating the article contact in the first portion and placing the dimpled surface in the second portion, the design achieves both secure retention and improved airflow management while minimizing the contact area between the dimpled surface and 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
This design enhances heating efficiency, improves airflow management, and ensures secure article retention, reducing friction and debris issues, thus enhancing user experience.
Implementation Method 1
a heating element, in particular a resistive heating element or an inductive heating element, for heating the aerosol-forming substrate within the device
Implementation Method 2
The second axial portion is dimpled comprising a plurality of indentations... promoting turbulent airflow
Implementation Method 3
condensate formation within the chamber may cause an undesired moistening of the article... when vaporized compounds of the aerosol-forming substrate are cooled in contact with those portions of the chamber walls which are at temperatures below the dew point
Data Source
AI summary
An aerosol-generating device (100) for use with an aerosol-generating article comprises a chamber (121) for removably receiving at least a portion of the aerosol-generating article. Along a center axis (122) of the chamber (121), an inner surface (130) of the chamber (121) comprises a first axial portion (131) and a second axial portion (132), wherein the first axial portion (131) is closer to a proximal end (124) of the chamber (121) than the second axial portion (132). The second axial portion (132) is dimpled comprising a plurality of indentations (142), wherein the plurality of indentations (142) extend from a base level area of the second axial portion (142) outwards in a direction away from the center axis (122). The first axial portion (131) comprises a plurality of first protrusions (141), wherein the plurality of first protrusions (141) are configured to contact at least a portion of the aerosol-generating article when the article is received in the chamber (121), and wherein the plurality of first protrusions (141) extend from abase level area of the first axial portion (131) in a direction towards the center axis (122) beyond the base level area of the second axial portion (132).