Planar Aerosol Substrate Wrapping with Window for Heat Transfer
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Solution Overview
Problem
Current aerosol generating devices face challenges in optimizing the characteristics of the aerosol generated, as the heat transfer efficiency to the aerosol generating substrate is not optimal, leading to suboptimal vaporization and aerosol formation.
Innovation Solution
An aerosol generating article with a substantially planar substrate wrapped by a wrapping member featuring a window aligned with the substrate, allowing direct heat transfer from the device's heater, enhancing energy efficiency and rapid heating, while the wrapping member's design includes a removable portion and anti-stick coating to facilitate handling and reduce residue.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a wrapping member completely covers the aerosol generating substrate, then the article structure is simple and manufacturing is easy, but heat transfer efficiency from the heater to the substrate is reduced
Solution Approach 1:
The wrapping member is segmented into different zones: a first wrapping portion that contacts the substrate for heat transfer, and a second wrapping portion that provides structural support. This segmentation allows the heat transfer portion to be thin and conductive while the support portion can be thicker and more structurally sound, resolving the contradiction between manufacturing simplicity and heat transfer efficiency.
Solution Approach 2:
The wrapping member exhibits local quality variations with different thermal conductivities and thicknesses in different regions. The first wrapping portion has higher thermal conductivity and lesser thickness to facilitate heat transfer, while the second wrapping portion has lower thermal conductivity and greater thickness for structural support. This local differentiation optimizes heat transfer where needed while maintaining overall manufacturing simplicity.
2Strength
If the wrapping member has greater thickness for structural support, then mechanical strength is improved, but heat transfer efficiency to the substrate is reduced
Solution Approach 1:
The wrapping member is divided into a first wrapping portion with lesser thickness optimized for heat transfer and a second wrapping portion with greater thickness optimized for structural support. This segmentation allows each portion to be independently optimized for its specific function, resolving the contradiction between mechanical strength and heat transfer efficiency.
Solution Approach 2:
Different portions of the wrapping member have different local qualities: the first wrapping portion has higher thermal conductivity and lesser thickness for heat transfer, while the second wrapping portion has lower thermal conductivity and greater thickness for structural support. This local quality differentiation allows the system to achieve both strength and heat transfer efficiency simultaneously.
3Productivity
If the aerosol generating substrate is heated to higher temperature for better vaporization, then aerosol generation efficiency is improved, but energy consumption increases
Solution Approach 1:
The first wrapping portion acts as an intermediary heat transfer medium between the heater and the aerosol generating substrate. By optimizing its thermal conductivity and thickness, it efficiently mediates heat transfer, enabling effective vaporization at lower heater temperatures and thus reducing overall energy consumption while maintaining aerosol generation efficiency.
Solution Approach 2:
The invention optimizes parameters of the wrapping member (thermal conductivity, thickness) to change the heat transfer characteristics of the system. This allows the substrate to reach optimal vaporization temperature with reduced energy input, resolving the contradiction between aerosol generation efficiency and energy consumption.
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 improves heat transfer and energy efficiency, ensuring efficient vaporization and aerosol formation with optimal characteristics for inhalation, reducing maintenance and enhancing user experience.
Implementation Method 1
heating the aerosol generating substrate to a temperature typically in the range 150° C. to 300° C.
Implementation Method 2
heating the aerosol generating substrate... to volatise at least one component of the aerosol generating substrate and thereby generate a heated vapour
Implementation Method 3
heat transfer may be improved from a heater of an aerosol generating device to the aerosol generating substrate
Implementation Method 4
the heated vapour which cools and condenses to form an aerosol
Implementation Method 5
the heated vapour which cools and condenses to form an aerosol for inhalation
Data Source
AI summary
An aerosol generating article for use with an aerosol generating device includes a substantially planar aerosol generating substrate and a wrapping member surrounding the substantially planar aerosol generating substrate to form a substantially planar aerosol generating article. The wrapping member includes a window aligned with part of the aerosol generating substrate, and optionally includes a removable portion covering the window.