Aerosol Article Ventilation Zone for Cooling and Nicotine Delivery
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Solution Overview
Problem
Aerosol-generating articles that heat tobacco rather than combust it face challenges in nicotine delivery and aerosol cooling, and existing solutions can reduce nicotine delivery or are not practical for easy use and efficient heating.
Innovation Solution
The aerosol-generating article features a downstream ventilation zone with a solid plug filter segment and a hollow tubular element, allowing air to cool aerosol downstream, reducing upstream filtration and enhancing nicotine delivery while maintaining article length and ease of use.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If a high filtration efficiency segment is used to cool the aerosol, then aerosol cooling is improved, but nicotine delivery is reduced
Solution Approach 1:
The article is divided into distinct functional segments: an upstream filter segment for particle filtration, a ventilation zone for cooling, and a downstream filter segment for additional filtration. This segmentation allows each zone to perform its specific function optimally without compromising overall nicotine delivery, as the ventilation zone is positioned to cool aerosol after it has passed through the upstream filter but before the downstream filter.
Solution Approach 2:
The ventilation zone acts as an intermediary cooling chamber between the aerosol generation zone and the downstream filter segment. It provides a dedicated space for aerosol cooling through air flow without requiring the main filtration path to be blocked by a high efficiency filter, thus maintaining nicotine delivery while achieving effective cooling.
2Quantity of substance
If the heating temperature is increased to boost nicotine delivery, then nicotine delivery is improved, but aerosol cooling requirement increases
Solution Approach 1:
By separating the heating zone from the cooling zone into distinct segments of the article, the design allows independent optimization of each function. The heating section can reach higher temperatures for better nicotine release while the dedicated ventilation zone handles the cooling requirement, eliminating the trade-off between heating temperature and cooling demand.
3Quantity of substance
If the downstream filter segment is positioned earlier to improve filtration, then filtration efficiency is improved, but aerosol generation efficiency is reduced
Solution Approach 1:
The article is segmented into an upstream filter segment, ventilation zone, and downstream filter segment. This positioning ensures that the downstream filter segment is located after the aerosol has been generated and cooled, allowing it to filter particles without interfering with the aerosol generation process. The upstream filter segment handles initial filtration while the downstream segment provides final filtration, maintaining both filtration efficiency and aerosol generation efficiency.
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 increases aerosol delivery per puff by minimizing upstream loss and optimizing aerosol generation efficiency, while allowing for reduced tobacco waste and compatibility with existing devices.
Implementation Method 1
a ventilation zone downstream of the downstream filter segment... allowing air to cool aerosol downstream
Implementation Method 2
an aerosol is generated by the transfer of heat from a heat source to a physically separate aerosol-generating substrate
Implementation Method 3
volatile compounds are released from the aerosol-generating substrate by heat transfer from the heat source
Implementation Method 4
As the released compounds cool, they condense to form an aerosol
Data Source
AI summary
An aerosol-generating article is provided, including: a rod of aerosol-generating substrate; and a downstream section provided downstream of the rod of aerosol-generating substrate, the downstream section including: a downstream filter segment being a solid plug, a ventilation zone disposed at a location downstream of the downstream filter segment, and a downstream hollow tubular element disposed at a location downstream of the downstream filter segment, the ventilation zone including a plurality of perforations through a peripheral wall of the downstream hollow tubular element, the downstream hollow tubular element having a thickness of the peripheral wall of between 0.3 millimetre and 0.75 millimetre, and the downstream hollow tubular element extending to a downstream end of the aerosol-generating article. An aerosol-generating system including the aerosol-generating article and an aerosol-generating device is also provided.