Filter Element With Rotating Non-Circular Channels
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Solution Overview
Problem
Standard tube filter elements in smoking articles often lead to concentrated smoke streams, which can result in an unpleasant smoking sensation and inadequate filtration, particularly in heated tobacco products, where smoke flavor and particulate matter retention are concerns.
Innovation Solution
A mouthpiece or filter element with a longitudinally extending core of filtering material featuring channels with non-circular, rotating transverse cross sections and helical ridges, which cause smoke to take a non-linear path, enhancing dispersion and filtration efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a standard tube filter element is used, then the structure is simple and easy to manufacture, but the smoke becomes concentrated and directs at the tongue causing unpleasant sensation
Solution Approach 1:
The channel cross-section is designed to be non-circular with asymmetric dimensions that vary along the longitudinal axis. The first cross-sectional dimension differs from the second cross-sectional dimension, creating an asymmetric flow path that disperses smoke rather than concentrating it into a straight stream directed at the tongue.
Solution Approach 2:
The channel cross-sectional dimensions are made dynamic by varying them along the longitudinal axis of the filter element. The cross-section changes from one location to another, creating a dynamic flow path that continuously alters smoke direction and promotes dispersion throughout the oral cavity.
2Reliability
If a standard tube filter element is used, then the filtration structure is simple, but the retention of nicotine-free dry particulate matter is insufficient
Solution Approach 1:
The asymmetric channel cross-section increases the surface area of the filtering material that contacts the smoke flow. By having different first and second cross-sectional dimensions, more filtering surface is exposed to the particulate matter, enhancing retention of nicotine-free dry particulate matter.
Solution Approach 2:
The varying cross-sectional dimensions along the longitudinal axis create a dynamic flow path that extends the residence time of smoke within the filtering material. This dynamic geometry ensures more thorough contact between smoke and filter media, improving particulate matter retention.
3Ease of operation
If a standard tube filter element is used, then the manufacturing process is straightforward, but the flavor dispersion is inadequate
Solution Approach 1:
The asymmetric channel design with varying cross-sectional dimensions naturally disperses flavor compounds throughout the oral cavity rather than concentrating them in a single direction. This geometric asymmetry ensures more uniform flavor distribution without requiring additional flavoring mechanisms.
Solution Approach 2:
The dynamic variation in channel cross-section along the longitudinal axis creates turbulent flow patterns that enhance mixing and dispersion of flavor compounds. This dynamic geometry passively promotes flavor distribution throughout the mouth during normal smoking.
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 provides a more dispersed smoking sensation, a spicier flavor in tobacco smoke, and improved filtration by reducing nicotine-free dry particulate matter and increasing nicotine retention compared to standard tube filters.
Implementation Method 1
smoke which passes through the mouth piece or filter element is caused to take a non-linear, for example helical or spiral path, through the or each channel
Implementation Method 2
the filter element of the present invention leads to an increased nicotine free dry particulate matter retention and a greater nicotine retention
Implementation Method 3
the or each channel comprises one or more ridges which extend helically about a longitudinal axis... leads to improved filtration
Data Source
AI summary
There is disclosed a mouth piece, filter element or cooling element 100 comprising: a longitudinally extending core of filtering material 102; one or more channels 104 extending longitudinally from an end of the core 102; wherein the or each channel 104 has a non-circular transverse cross section which varies in the longitudinal direction by rotating about a longitudinal axis I of the mouth piece, filter element or cooling element 100.