Aerosol Device Planar Heating Mesh Temperature Gradient
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Solution Overview
Problem
Aerosol generation devices face issues with temperature degradation of the liquid transport element due to its close proximity to the heating element, leading to inconsistent wicking and heating performance, which affects the device's lifespan and aerosol generation properties.
Innovation Solution
The device features a planar heating element with a mesh of electrically conductive fibers and a separate liquid transport element arranged to optimize wicking, with a heating rod providing a central region of high current density to create a temperature gradient, keeping the liquid transport element away from hot regions and allowing for efficient liquid transport via capillary action.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the liquid transport element is placed close to the heating element, then liquid transport efficiency is improved, but temperature degradation of the liquid transport element occurs
Solution Approach 1:
The patent divides the device into separate functional components: a heating element and a liquid transport element. The liquid transport element is positioned at the periphery while the heating element occupies the central region, spatially segmenting the functions to prevent thermal degradation of the transport element while maintaining efficient liquid delivery.
Solution Approach 2:
The patent creates distinct functional zones within the device: a central heating region with high temperature for aerosol generation and a peripheral liquid transport region with lower temperature for capillary wicking. This local differentiation allows each component to operate in its optimal temperature zone, resolving the contradiction between transport efficiency and thermal durability.
2Power
If the heating element uses a mesh of conductive fibres, then heating performance is improved, but wicking consistency becomes variable
Solution Approach 1:
The patent separates the heating function (performed by the mesh element) from the liquid transport function (performed by the peripheral liquid transport element). This segmentation allows the mesh to optimize for heating performance while the dedicated transport element ensures consistent liquid delivery, eliminating the compromise between power and wicking stability.
3Reliability
If the liquid transport element is placed away from the heating element, then temperature degradation is reduced, but liquid transport efficiency decreases
Solution Approach 1:
The patent establishes a temperature gradient across the device with the heating element creating a hot central zone and the peripheral regions remaining cooler. The liquid transport element is positioned in this cooler peripheral zone, allowing it to operate away from high temperatures while still maintaining proximity to the heating element for efficient liquid transport through capillary action.
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 wicking properties, reduces power consumption, and extends the device's lifespan by minimizing temperature degradation, while maintaining compact design and efficient aerosol generation.
Implementation Method 1
The electrical resistance of the conductive material causes heat to be generated as the electric current passes through the material, a process commonly known as resistive heating.
Implementation Method 2
a liquid transport element arranged between the liquid store and the planar heating element and configured to transport liquid from the liquid store to the planar heating element under capillary action during use
Data Source
AI summary
An aerosol generating device includes a planar heating element including a mesh of electrically conductive fibres, a heating rod in contact with a central portion of the planar heating element to provide a central region of high current density, thereby providing a temperature gradient across the planar heating element during use, a liquid store, and a liquid transport element arranged between the liquid store and the planar heating element and configured to transport liquid from the liquid store to the planar heating element under capillary action during use, wherein the liquid transport element is arranged in contact with an edge portion of the mesh.