Puff-Responsive Heating Profiles for Consistent Aerosol Generation
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Aerosol-generating systems often generate inconsistent aerosol quality due to variations in user puff behavior, particularly when users deviate from the predetermined heating profile optimized for a specific puff behavior, such as those typical of Kretek and non-Kretek cigarette smokers.
Innovation Solution
An aerosol-generating device with control circuitry that determines user puff behavior during a first period of a usage session and selects an appropriate predetermined heating profile from a set of profiles optimized for different puff behaviors, ensuring consistent aerosol generation during a subsequent second period.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a predetermined heating profile is optimized for a specific puff behaviour, then aerosol generation is consistent for that specific behaviour, but aerosol generation becomes inconsistent when users follow different puff behaviours
Solution Approach 1:
The system transitions from a static, fixed heating profile to a dynamic, adaptive heating profile that automatically adjusts based on detected user puff behavior. The controller monitors puff characteristics (duration, intensity, frequency) and modifies heating parameters in real-time to maintain optimal aerosol generation across different user behaviors.
Solution Approach 2:
The system implements a feedback loop where the controller continuously monitors actual puff behavior parameters and uses this information to adjust the heating profile. This closed-loop control ensures that the heating parameters remain optimized despite variations in user puffing patterns, resolving the contradiction between consistency and adaptability.
2Ease of operation
If the heating profile is fixed for a specific puff behaviour, then the system is simple to control, but the aerosol quality varies significantly when users deviate from the optimized behaviour
Solution Approach 1:
The system performs self-adjustment by automatically detecting puff behavior parameters and modifying heating profiles without user intervention. This eliminates the need for manual control while ensuring consistent aerosol quality, as the system serves itself by adapting to user behavior patterns autonomously.
Solution Approach 2:
The system dynamically changes heating parameters (temperature, power levels, heating duration) based on detected puff characteristics. By adjusting these parameters in response to actual user behavior, the system maintains precise control over aerosol generation quality while remaining easy to operate.
3Device complexity
If a single heating profile is used throughout the usage session, then the device complexity is low, but the system cannot accommodate varying user puff behaviours throughout the session
Solution Approach 1:
The usage session is divided into multiple phases or segments, with each segment having its own optimized heating profile. The controller divides the session based on detected changes in puff behavior patterns, applying different heating strategies to different segments to accommodate varying user behaviors throughout the session.
Solution Approach 2:
The heating profile transitions from a static, single-profile approach to a dynamic, multi-profile approach that adapts over time. The system automatically selects and switches between different heating profiles based on real-time detection of puff behavior changes, increasing adaptability without proportionally increasing complexity.
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 device ensures consistent aerosol generation throughout a usage session by adapting to individual user puff patterns, accommodating various puff behaviors and maintaining aerosol quality regardless of user variability.
Implementation Method 1
Many known aerosol-generating systems generate aerosol by the application of heat to the substrate by a heater assembly
Data Source
AI summary
An aerosol-generating device is provided for generating an aerosol from an aerosol-generating article including an aerosol-forming substrate, the device being configured to generate the aerosol during a usage session including a usage session start, end, and first and second periods between the start and the end, the device including: a heater assembly to heat the substrate; a power supply to supply power to the assembly; and control circuitry including a memory in which predetermined different heating profiles are stored, the circuitry to determine a user puff behaviour during the first period, to use the determined behaviour to select one of the predetermined profiles, and to control the power during the second period according to the selected profile, the usage session end corresponding to an end of the selected profile, the first period start corresponding to the usage session start and the second period end corresponding to the usage session end.