Insulating Chamber Aerosol Device Thermal Management
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Solution Overview
Problem
Existing aerosol generating devices, such as electronic cigarettes, face challenges in compact design due to heat transfer from the heater to the outer surfaces, leading to uncomfortably high temperatures for users.
Innovation Solution
The aerosol generating device incorporates a heater positioned on the outer surface of an inner wall within an insulating chamber, with electrical connections to the outer wall, allowing for thermal insulation and simplified construction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If a heater is provided in a compact aerosol generating device, then heating function is achieved, but the outer surfaces become unacceptably hot for user comfort
Solution Approach 1:
The heater is nested within the chamber structure, specifically positioned inside the space defined by the outer wall. This nesting arrangement allows the heater to be contained within the device boundaries while maintaining thermal separation from the outer surfaces that contact the user, thus achieving heating function without transferring excessive heat to user-contact areas.
Solution Approach 2:
The chamber structure, particularly the outer wall, acts as an intermediary between the heater and the external environment. The outer wall provides thermal isolation, mediating the heat transfer process to prevent direct conduction of heater temperature to the outer surfaces, thereby maintaining user comfort while preserving heating capability.
2Reliability
If separate electrical terminals are provided through the outer wall, then electrical connections are established, but device complexity increases
Solution Approach 1:
The outer wall is designed to perform multiple functions simultaneously: it provides structural enclosure for the chamber, maintains vacuum isolation, and serves as the electrical connection interface through its integrated first and second regions. This multi-functionality eliminates the need for separate electrical terminals or additional connection components, thereby reducing device complexity while ensuring reliable electrical connectivity.
Solution Approach 2:
The electrical connection function is merged with the outer wall structure itself. The first and second regions of the outer wall are directly configured to receive electrical connections, combining what would traditionally be separate components (outer wall and electrical terminals) into a single integrated structure, thus simplifying the overall device construction.
3Object-affected harmful factors
If thermal separation is provided between heater and outer surfaces, then user comfort is improved, but device size increases
Solution Approach 1:
The heater and chamber are nested within the compact device boundaries without requiring additional external insulation layers. The thermal separation is achieved through the intelligent spatial arrangement and material properties of the existing chamber structure, particularly the outer wall, rather than adding separate insulation components that would increase device volume.
Solution Approach 2:
The outer wall exhibits local quality variations with distinct first and second regions having different electrical and thermal characteristics. This local differentiation allows the structure to provide targeted thermal isolation where needed while maintaining overall compact dimensions, avoiding the need for uniform thick insulation throughout the entire device.
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 effectively reduces heat transfer to the outer surfaces, maintaining user comfort while simplifying the device's construction and reducing its size.
Implementation Method 1
the chamber is a vacuum chamber. In this way, the outer wall, and thus the exterior of the device, may be better insulated from heat from the heater
Data Source
AI summary
An aerosol generating device includes an insulating chamber, which may be a vacuum chamber, defined between an inner wall and an outer wall. A heating chamber is defined radially inwardly of the inner wall. The device also includes a heater on an outer surface of the inner wall. The heater is electrically connected to a first region of the outer wall and to a second region of the outer wall. The first and second regions are electrically insulated from each other by an insulator.