Segregated Aerosol Substrate With Dual Temperature Zones
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Solution Overview
Problem
Existing smoking articles using electrical energy to heat tobacco or other aerosol generating substrates suffer from inconsistent performance characteristics, such as inconsistent flavor release and inadequate loading of aerosol precursor compositions.
Innovation Solution
An aerosol source member with a segmented substrate portion comprising different aerosol formers, each heated to specific temperatures to optimize aerosolization without substantial degradation, using a heat source that can be electrically powered or combustible, and optionally incorporating barriers to control temperature.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a single substrate material is used for aerosol generation, then the device structure is simple, but the flavor release consistency and aerosolization performance are inadequate
Solution Approach 1:
The substrate is divided into multiple segments with different materials or properties along the aerosol pathway. Each segment can be optimized for specific functions such as heating, flavor release, or aerosol formation, thereby improving overall performance consistency without using a single compromised material
Solution Approach 2:
Different portions of the substrate are assigned different materials or characteristics tailored to local requirements. For example, the region near the heat source may use heat-resistant material while downstream regions use materials optimized for flavor release, achieving optimal performance at each location
2Productivity
If high temperature heating is applied to aerosolize substrates, then aerosolization efficiency is improved, but substrate degradation and harmful combustion products increase
Solution Approach 1:
The heating process is divided into multiple temperature zones along the aerosol pathway. The first zone uses higher temperature for efficient aerosolization while subsequent zones use lower temperatures to prevent degradation, allowing each segment to operate at its optimal temperature range
Solution Approach 2:
A barrier or intermediate layer is introduced between the heat source and the substrate to control heat transfer. This intermediary prevents excessive temperature exposure that causes degradation while maintaining sufficient heat for aerosolization, effectively decoupling the heating intensity from substrate exposure
3Adaptability or versatility
If uniform temperature is applied across the substrate, then the heating control is simple, but different aerosol formers cannot be optimized for their specific temperature requirements
Solution Approach 1:
The substrate temperature profile is segmented into multiple zones with different temperature levels. Each zone is optimized for specific aerosol formers based on their thermal requirements, allowing simultaneous optimization of multiple components without requiring complex real-time control systems
Solution Approach 2:
Different temperature conditions are provided at different locations along the substrate rather than uniform heating. This spatial variation in temperature quality allows each region to be optimized for its specific function and the aerosol formers present in that region
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 consistent aerosol delivery with enhanced flavor release and efficient aerosolization of various substrates, mimicking traditional smoking sensations without significant combustion.
Implementation Method 1
wherein the first substrate segment and the second substrate segment are configured such that when heated by a heat source
Implementation Method 2
the first substrate segment is heated to a first temperature and the second substrate segment is heated to a second temperature
Implementation Method 3
the first temperature is configured to aerosolize the first aerosol former without substantial degradation of the first aerosol former and the second temperature is configured to aerosolize the second aerosol former
Implementation Method 4
utilize electrical energy to vaporize or heat a volatile material
Data Source
AI summary
The present disclosure provides an aerosol source member and an aerosol delivery device that includes an aerosol source member. The aerosol source member includes a segmented substrate portion that includes a first substrate segment and a second substrate segment. The first substrate segment includes a first aerosol former, the second substrate segment includes a second aerosol former different from the first aerosol former, and the second substrate segment is positioned between the first substrate segment and a downstream end of the aerosol source member. The first substrate segment and the second substrate segment are configured such that when heated by a heat source, the first substrate segment is heated to a first temperature and the second substrate segment is heated to a second temperature that is less than the first temperature.