Hybrid Aerosol Device With Split Paths for Flavor Consistency
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing hybrid aerosol-generating devices suffer from inconsistent aerosol mixing, flavor degradation of the second aerosol due to thermal decomposition, and high resistance to draw, particularly when the first aerosol-forming substrate is at a higher temperature than the second.
Innovation Solution
The device incorporates a primary airflow path through the first aerosol-forming substrate and a secondary airflow path that merges downstream, avoiding the second aerosol-forming substrate from passing through the first, ensuring consistent aerosol mixing and reducing thermal decomposition while balancing airflow resistance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the second aerosol-forming substrate is placed downstream of the first in a unitary airflow path, then both substrates can be heated simultaneously to generate aerosol, but the volatile compounds from the second substrate pass through the first substrate's high-temperature region causing thermal decomposition and flavor degradation
Solution Approach 1:
The airflow path is divided into two separate paths: a first airflow path through the first aerosol-forming substrate and a second airflow path through the second aerosol-forming substrate. This segmentation prevents the volatile compounds from the second substrate from passing through the high-temperature region of the first substrate, thereby avoiding thermal decomposition while maintaining simultaneous aerosol generation from both substrates.
Solution Approach 2:
A mixing region is introduced as an intermediary space where the first airflow path and second airflow path converge. This mixing region allows the aerosol from both substrates to combine after both have been properly formed, preventing direct interaction between the hot first substrate and the volatile compounds from the second substrate that would cause decomposition.
2Device complexity
If a unitary airflow path is used to pass through both substrates, then the device structure is simple, but the resistance to draw becomes unacceptably high due to the porosity of the first aerosol-forming substrate
Solution Approach 1:
The single unitary airflow path is segmented into two separate airflow paths that operate in parallel. Each path has its own airflow characteristics and resistance levels. By separating the paths, the overall resistance to draw is reduced because the user's inhalation draws air through both paths simultaneously rather than forcing all air through the high-resistance first substrate alone.
3Stability of the object's composition
If the airflow passes through the first aerosol-forming substrate to reach the second, then both aerosols can mix before inhalation, but the mixing is inconsistent during and between puffs
Solution Approach 1:
A dedicated mixing region is introduced as an intermediary space where the first airflow path and second airflow path converge after both aerosols have been formed. This mixing region provides a controlled environment for consistent aerosol blending through turbulent mixing and diffusion, ensuring uniform composition during and between puffs, while maintaining efficient aerosol generation from both substrates.
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 achieves consistent aerosol mixing and minimizes flavor degradation while lowering the overall resistance to draw, providing a more uniform and comfortable user experience.
Implementation Method 1
The device may provide power to enable the transfer of heat from a heat source to the aerosol-forming substrate of the aerosol-generating article
Implementation Method 2
As the released compounds cool, they condense to form an aerosol that is inhaled by the consumer
Data Source
Figure 1
Figure 2
Figure 3
AI summary
An aerosol-generating system comprising an aerosol-generating device (100) for simultaneously generating an aerosol from a first aerosol-forming substrate (205) and an aerosol from a second aerosol-forming substrate (124) is provided. The aerosol-generating device (100) comprises a device housing (101) that defines a first substrate receiving portion (106a) for receiving the first aerosol-forming substrate (205) and a second substrate receiving portion (120) for receiving the second aerosol-forming substrate (124). The device housing (101) also defines a primary airflow path extending through the first substrate receiving portion (106a) and a secondary airflow path extending through the device (100) such that, in use, the secondary airflow path is in fluidic communication with the second aerosol-forming substrate (124) received in second substrate receiving portion (120). The secondary airflow path merges with the primary airflow path at a junction downstream of the first substrate receiving portion.