Aerosol Device Controller Temperature Rate Water Content
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Solution Overview
Problem
Aerosol-generating devices face challenges in maintaining consistent aerosol formation across multiple user experiences without intermediate recharging, particularly due to variations in aerosol-forming substrate water content.
Innovation Solution
The device incorporates a controller that determines the rate of increase in temperature of the electrical heater during a first time period to assess the water content of the aerosol-forming substrate. Based on this determination, the controller adjusts the power supply to the electrical heater during a second time period, selecting an appropriate heating profile to ensure consistent user experience.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the controller uses temperature increase rate to determine water content, then the assessment reliability improves, but the measurement accuracy deteriorates in certain conditions
Solution Approach 1:
The controller performs a preliminary heating phase before the actual user experience to establish a baseline temperature increase rate. This preliminary action allows the system to characterize the aerosol-forming substrate's water content before正式 operation, improving assessment reliability without interfering with the actual measurement during use.
Solution Approach 2:
The heating process is divided into multiple time periods: a first time period for determining water content based on temperature increase rate, and a second time period for adjusted heating based on the determination. This segmentation allows the system to optimize each phase independently, improving overall measurement and control accuracy.
2Productivity
If the device provides multiple user experiences without intermediate recharge, then the productivity improves, but the consistency of aerosol formation deteriorates
Solution Approach 1:
Before each user experience, the controller performs a preliminary characterization of the aerosol-forming substrate to determine its water content. This preliminary action ensures that the heating profile is optimized for each specific substrate, maintaining aerosol formation consistency across multiple experiences without requiring recharging.
Solution Approach 2:
The heating profile is dynamically adjusted based on the determined water content of the aerosol-forming substrate. The controller modifies heating parameters in real-time according to substrate characteristics, enabling consistent aerosol formation across multiple user experiences with varying substrate properties.
3Stability of the object's composition
If the controller adjusts power supply based on temperature increase rate, then the aerosol formation consistency improves, but the device complexity increases
Solution Approach 1:
The controller implements a feedback mechanism where the temperature increase rate during the first time period is measured and used to determine water content, which then feeds back into adjusting the power supply for the second time period. This feedback loop maintains aerosol formation consistency while keeping the control logic relatively simple and implementable.
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 solution allows for more reliable assessment of the aerosol-forming substrate's water content, enabling the device to select the appropriate heating profile, thus maintaining consistent aerosol formation across multiple user experiences without the need for intermediate recharging.
Implementation Method 1
an electrical heater arranged to heat an aerosol-forming substrate when the aerosol-forming substrate is received within the cavity, such as to provide the user an experience of inhalable aerosol
Implementation Method 2
determine a rate of increase in temperature of the electrical heater during the first time period by determining a time taken for a temperature of the electrical heater to increase
Data Source
AI summary
An aerosol-generating device is provided, including: a cavity to receive an aerosol-forming substrate; an electrical heater to heat the substrate when received within the cavity; a rechargeable power supply to provide first and second experiences without intermediate recharge; and a controller to control power to the heater during first and second time periods, determine in the first time period whether the experience is the first or the second experience, and to determine a rate of increase in a heater temperature during the first time period by determining a time taken for the heater temperature to increase from a first to a second predetermined temperature during the first time period, and adjust the power during the second time period based on if the experience is the first or the second experience and based on the determined rate of increase in the heater temperature during the first time period.