Aerosol Generating Device Humidity Detection and Profile Control
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Solution Overview
Problem
Existing aerosol generating devices struggle to distinguish between normal cigarettes and excessively moist cigarettes, leading to inconsistent temperature profiles and user experience.
Innovation Solution
An aerosol generating device equipped with a heater, temperature sensor, and controller that calculates the temperature increase time of a cigarette to determine its humidity state, adjusting the power supply to the heater based on a basic or correction temperature profile.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a single temperature profile is used for all cigarettes, then the device structure is simple, but the temperature control precision is poor for excessively moist cigarettes
Solution Approach 1:
The system dynamically selects between a basic temperature profile and a first correction profile based on the detected humidity state of the cigarette. This dynamic adaptation allows the device to optimize temperature control for different cigarette conditions without requiring a complex multi-profile system, resolving the contradiction between precision and simplicity.
Solution Approach 2:
The controller changes the temperature profile parameters based on the detected cigarette humidity state. When excessive moisture is detected (indicated by temperature increase time >= threshold), the system switches to a correction profile with adjusted heating parameters, thereby achieving precise temperature control adapted to different material states.
2Productivity
If the heating power is increased to compensate for excessive moisture, then the atomization is improved, but the initial hot feeling increases
Solution Approach 1:
The system performs preliminary detection of the cigarette humidity state before initiating the heating process. By measuring the temperature increase time in advance, the controller can pre-select the appropriate temperature profile, preventing the initial hot feeling while ensuring proper atomization from the start.
Solution Approach 2:
The system uses feedback from the temperature sensor to detect the cigarette's humidity state and adjusts the heating profile accordingly. This closed-loop control ensures that the heating power is optimized based on actual cigarette conditions, achieving good atomization without excessive initial heat.
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 effectively distinguishes between normal and excessively moist cigarettes, providing tailored temperature profiles that enhance user comfort and aerosol quality by reducing the initial hot feeling and increasing atomization.
Implementation Method 1
a heater configured to heat a cigarette
Implementation Method 2
a temperature sensor configured to measure a temperature of the heater
Data Source
AI summary
An aerosol generating device according to an embodiment includes a heater configured to heat a cigarette, a temperature sensor configured to measure temperature of the heater, and a controller configured to determine a humidity state of the cigarette by calculating a temperature increase time of the cigarette by using the temperature sensor and by comparing the calculated temperature increase time of the cigarette with a preset threshold. The controller supplies power to the heater according to a basic temperature profile when the temperature increase time is less than the threshold, and supplies power to the heater according to a first correction profile when the temperature increase time is greater than or equal to the threshold.