Variable Air Inlet Mouthpiece for Aerosol Generation
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Solution Overview
Problem
Existing aerosol-generating systems for nicotine delivery lack predictability and control over reaction stoichiometry and resistance to draw (RTD), affecting the total delivery of nicotine salt particles per puff.
Innovation Solution
An aerosol-generating system with separate compartments for nicotine and acid sources, and a mouthpiece with a variable air inlet, allowing control of reaction stoichiometry and RTD through adjustable airflow, facilitating consistent nicotine salt particle delivery.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a fixed air inlet is used in the mouthpiece, then the device structure is simple, but the control over reaction stoichiometry and nicotine delivery is poor
Solution Approach 1:
The patent applies the dynamics principle by making the air inlet variable rather than fixed. The mouthpiece includes an adjustable air inlet that can change its flow area, allowing the system to adapt to different reaction stoichiometry requirements. This dynamic adjustment capability enables control over the mixing ratio of nicotine vapor and acid vapor while maintaining a relatively simple overall device structure.
2Adaptability or versatility
If a variable air inlet with multiple configurations is provided, then the control over nicotine delivery is improved, but the device complexity increases
Solution Approach 1:
The patent applies parameter changes by varying the flow area of the air inlet to control nicotine delivery. The adjustable air inlet mechanism allows changes in geometric parameters (flow area) to achieve different nicotine delivery rates and reaction stoichiometries. This approach provides effective control while keeping the mechanism relatively simple compared to more complex adjustable systems.
3Adaptability or versatility
If separate compartments for nicotine and acid sources are used, then the reaction stoichiometry control is improved, but the device complexity increases
Solution Approach 1:
The patent applies segmentation by dividing the cartridge into separate compartments for nicotine source and acid source. This physical separation allows independent control of vapor generation for each component, enabling precise control over reaction stoichiometry. The segmented design achieves improved control while maintaining a manageable cartridge structure through modular organization.
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 system provides enhanced control over nicotine salt particle delivery and resistance to draw, ensuring consistent user experience by varying the flow area of the mouthpiece's air inlet, thereby adjusting the volumetric airflow and nicotine delivery per unit volume.
Implementation Method 1
the mouthpiece comprises a third air inlet in fluid communication with the chamber and a third air outlet in fluid communication with the chamber, wherein the third air inlet defines a flow area, and wherein the mouthpiece is configured so that the flow area through the third air inlet is variable
Implementation Method 2
the reaction stoichiometry may be controlled and balanced through variation of the volumetric airflow through the first compartment of the cartridge relative to the volumetric airflow through the second compartment of the cartridge
Implementation Method 3
nicotine and a volatile acid, such as pyruvic acid, are reacted with one another in the gas phase to form an aerosol of nicotine salt particles
Data Source
AI summary
There is provided an aerosol-generating system including a cartridge including: a first compartment containing a nicotine source, the first compartment having a first air inlet and a first air outlet; and a second compartment containing an acid source, the second compartment having a second air inlet and a second air outlet; and a mouthpiece configured to engage with the cartridge to define a chamber in fluid communication with the first air outlet and the second air outlet, the mouthpiece comprising a third air inlet in fluid communication with the chamber and a third air outlet in fluid communication with the chamber, the third air inlet defining a flow area, and the mouthpiece being configured so that the flow area through the third air inlet is variable.