Aerosol-Generating Article With Isolated Airflow Pathways
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Solution Overview
Problem
Existing heated aerosol-generating articles with dual aerosol-generating substrates result in uncontrolled and variable proportions of volatile compounds in the inhalable aerosol due to simultaneous heating by electrically-operated devices.
Innovation Solution
The aerosol-generating article features isolated airflow pathways for each aerosol-generating substrate, ensuring that volatile compounds from each substrate are entrained in separate airflows, allowing for controlled proportions of volatile compounds in the inhalable aerosol.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If two or more physically separate aerosol-generating substrates are heated simultaneously by the electrically-operated aerosol-generating device, then the generation of volatile compounds from multiple substrates is achieved, but the proportions of volatile compounds in the inhalable aerosol become uncontrolled and variable
Solution Approach 1:
The patent divides the heating system into separate heating elements, with each heating element dedicated to a specific aerosol-generating substrate. This segmentation allows independent control of heating for each substrate, enabling precise control over the proportions of volatile compounds released from each substrate into the aerosol mixture.
Solution Approach 2:
The patent implements dynamic control capabilities where the heating of each substrate can be independently adjusted in real-time. This allows the system to adaptively control the release rates of volatile compounds from different substrates, maintaining desired proportions despite variations in substrate composition or environmental conditions.
2Adaptability or versatility
If dual aerosol-generating substrates are used in heated aerosol-generating articles, then diverse volatile compound profiles can be achieved, but consistency and user experience deteriorate due to uncontrolled proportions
Solution Approach 1:
The patent incorporates feedback control mechanisms that monitor the aerosol generation process and adjust heating parameters accordingly. This feedback system ensures consistent proportions of volatile compounds from each substrate are maintained, improving reliability and user experience while preserving the diversity of compound profiles.
Solution Approach 2:
The patent utilizes independent parameter control for each heating element, allowing separate adjustment of temperature, heating rate, and duration for each substrate. This parameter independence enables precise control over volatile compound release proportions, ensuring consistent aerosol composition despite the diversity of substrates used.
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 design enables the delivery of an inhalable aerosol with controlled proportions of volatile compounds from each substrate, improving consistency and user experience.
Implementation Method 1
an aerosol is generated by the transfer of heat from one or more electrical heating elements of the aerosol-generating device to the aerosol-generating substrate
Implementation Method 2
an inductor for heating the aerosol-generating substrate. In use, the fluctuating or alternating electromagnetic field produced by the inductor induces eddy currents in the susceptor, causing the susceptor to heat up
Implementation Method 3
As the released compounds cool, they condense to form an aerosol that is inhaled by the user
Data Source
Figure 1~4
Figure 5~6
AI summary
An aerosol-generating article (300) for generating an inhalable aerosol upon heating, the aerosol-generating article (300) having a proximal end (12) and a distal end (14) and comprising: a first aerosol-generating substrate (16) located between the distal end (14) and the proximal end (12) of the aerosol-generating article (300); a first air inlet (34) for admitting air into the aerosol-generating article (300); a second aerosol-generating substrate (18) located between the first aerosol-generating substrate (16) and the proximal end (12) of the aerosol-generating article (300); a second air inlet (36) for admitting air into the aerosol-generating article (300); a first airflow pathway extending from the first air inlet (34) through the first aerosol-generating substrate (16) towards the proximal end (12) of the aerosol-generating article (300); and a second airflow pathway extending from the second air inlet (36) through the second aerosol-generating substrate (18) towards the proximal end (12) of the aerosol-generating article (300), wherein the first airflow pathway and the second airflow pathway are isolated from one another. An aerosol-generating system (500) comprising the aerosol-generating article (300); and an aerosol-generating device (600) configured to heat the first aerosol-generating substrate (16) and the second aerosol- generating substrate (18) of the aerosol-generating article (300).