Zirconia Mount Thermal Insulation for Heat Not Burn Device
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Solution Overview
Problem
Existing heat not burn (HNB) smoking substitute systems face challenges in optimizing heat distribution and retention within the device, leading to inefficiencies and potential health risks associated with tobacco combustion, despite aiming to reduce harmful compounds.
Innovation Solution
A heat not burn device with a heater featuring a mount made from zirconia, which has lower thermal conductivity than the heating element, allowing for localized heat retention and reduced heat loss, combined with a ceramic heating element and resistive heating track for uniform heat distribution, effectively minimizing heat impact on non-heated parts and enhancing the longevity of the device.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If the heating element is made from highly thermally conductive material to ensure efficient heat transfer to tobacco, then heat distribution improves, but heat loss to non-heated parts increases
Solution Approach 1:
The patent applies local quality by creating distinct thermal zones within the heating assembly. The heating element (rod 142) made of highly conductive material ensures efficient heat distribution to the tobacco, while the mount (136) made of zirconia provides localized thermal insulation at the base. This spatial differentiation of thermal properties allows the system to optimize heat transfer where needed while minimizing heat loss to surrounding components, directly resolving the contradiction between heat distribution and heat loss.
2Speed
If the mount material has high thermal conductivity to dissipate heat quickly, then cooling speed improves, but heat retention in heating zone decreases
Solution Approach 1:
The patent implements local quality by assigning different thermal conductivity properties to different components based on their functional requirements. The heating element uses high thermal conductivity material for efficient heat distribution, while the mount uses low thermal conductivity zirconia to retain heat in the heating zone. This localized differentiation of thermal properties resolves the contradiction by ensuring each component performs its specific thermal function optimally.
3Device complexity
If the heating element is directly mounted without insulation to simplify structure, then device complexity reduces, but heat loss to mount increases
Solution Approach 1:
The patent introduces an intermediary component (the mount made of zirconia) between the heating element and the device housing. This intermediary serves as a thermal barrier that prevents direct heat transfer to non-heated parts while maintaining structural support. The zirconia mount acts as a thermal mediator that blocks harmful heat loss without adding significant structural complexity, as it integrates the mounting function with the insulation function in a single component.
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 retention and distribution within the HNB device, reducing heat loss and enhancing user experience by maintaining heat where needed, thus potentially lowering health risks and improving the overall performance of the smoking substitute system.
Implementation Method 1
The longitudinal heating element is configured to penetrate the tobacco portion of a consumable engaged with the device
Implementation Method 2
a mount surrounding a portion of the heating element and the heating track. The heating element is formed from a heater material of a first thermal conductivity and the mount is formed from a mount material of a second thermal conductivity. The second thermal conductivity is at least 3 times lower than the first thermal conductivity
Data Source
Figure 1A
Figure 1B
Figure 2A~2B
AI summary
A smoking substitute system (100) and device including a heater. The heater includes a heating element (223) including a resistive heating track formed thereon. The heater further includes a mount (233) surrounding a portion of the heating element and the heating track. The heating element is formed from a heater material of a first thermal conductivity and the mount is formed from a mount material of a second thermal conductivity. The second thermal conductivity is lower than the first thermal conductivity.