Tobacco Vaping Insert Geometry for Lower Draw Resistance
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Solution Overview
Problem
Existing tobacco vapor systems face challenges such as reduced flavor addition to vapor, undesirable temperature profiles, significant vapor loss due to filtration, and increased effective resistance to draw (RTD) due to high pressure drops in the tobacco column.
Innovation Solution
A non-combustible tobacco vaping insert is designed with a filter and a tobacco element where at least one portion of the tobacco element has a smaller diameter than the filter, allowing for improved vapor flow and flavor distribution. The insert is configured to allow vapor to pass through the tobacco element, ensuring efficient heating and flavor release without combustion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If a tobacco column is used to add tobacco flavors to vapor, then flavor addition is improved, but vapor loss due to filtration increases and pressure drop increases
Solution Approach 1:
The patent uses a porous tobacco element with controlled porosity (30-70%) instead of a dense tobacco column. This allows vapor to pass through more efficiently while still providing flavor compounds, reducing vapor loss while maintaining flavor addition functionality.
Solution Approach 2:
The patent employs a composite structure combining a filter material (cellulose acetate or hollow-acetate-tube) with a porous tobacco element. This composite design enables selective filtration of harmful particles while allowing vapor and flavor compounds to pass through, reducing overall vapor loss compared to traditional tobacco columns.
2Quantity of substance
If a tobacco column is used to add tobacco flavors to vapor, then flavor addition is improved, but effective resistance to draw increases due to high pressure drops
Solution Approach 1:
The porous tobacco element with 30-70% porosity creates lower flow resistance compared to dense tobacco columns, reducing the pressure drop and making it easier to draw vapor while still providing adequate flavor addition.
Solution Approach 2:
The patent transitions from a traditional cylindrical tobacco column to a tobacco element with varying cross-sectional area along its length. This dimensional variation optimizes vapor flow paths and reduces pressure drop, improving ease of operation while maintaining flavor addition.
3Object-affected harmful factors
If vapor is filtered through a tobacco column, then some purification is achieved, but temperature profile becomes undesirable and vapor loss increases
Solution Approach 1:
The porous tobacco element allows vapor to pass through with minimal cooling, maintaining a more desirable temperature profile while still providing purification through the filter material. The porosity enables efficient vapor transmission without excessive heat loss.
Solution Approach 2:
The composite structure of filter material combined with porous tobacco element provides selective purification - removing harmful particles through filtration while allowing vapor and heat to pass through efficiently, maintaining better temperature profiles compared to traditional tobacco columns.
4Speed
If a filter with larger diameter is used, then vapor flow capacity is improved, but tobacco element contact area with vapor decreases
Solution Approach 1:
The patent uses a tobacco element with varying cross-sectional area along its length, creating an optimized geometry where the tobacco element diameter varies to maintain appropriate contact with vapor flow. This dimensional variation ensures adequate flavor distribution while accommodating larger filter diameters for improved vapor flow capacity.
Solution Approach 2:
The tobacco element is designed with non-uniform properties along its length, with different cross-sectional areas at different positions. This local variation optimizes the balance between vapor flow capacity and tobacco-vapor contact area, ensuring both adequate flow and flavor distribution.
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 achieves a more uniform heating of the tobacco, reduces vapor loss and pressure drop, maintains a higher exit temperature, and enhances flavor distribution in the vapor, thereby improving the overall performance of the e-vaping device.
Implementation Method 1
a heater configured to vaporize the pre-vapor formulation that is communicated to the heater by the wick
Implementation Method 2
a wick in communication with at least one first portion of the air passage, distal ends of the wick being in communication with the reservoir
Implementation Method 3
a filter having a first diameter; and a non-combustible tobacco element with a first end contacting the filter
Data Source
AI summary
The method including forming a tobacco vaping insert that includes a tobacco element and a filter, the tobacco vaping insert being non-combustible, and inserting the tobacco vaping insert within a first air passage of a first section of an e-vaping device, first side surfaces of the filter directly contacting sidewalls of the first air passage, and a gap existing between at least a portion of second side surfaces of the tobacco element and the sidewalls of the first air passage.