Aerosol Device Combustion Gas Detector Feedback Control
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Solution Overview
Problem
Electrically heated smoking devices face challenges in maintaining optimal temperature to prevent combustion of aerosol-forming substrates, leading to undesirable aerosol constituents, especially when users can insert varying substrates with different compositions and moisture contents.
Innovation Solution
An aerosol-generating device equipped with a power supply, heater, and a controller connected to a combustion gas detector, which monitors carbon monoxide or nitric oxide levels to adjust heater power and prevent combustion, ensuring the aerosol quality by maintaining combustion gas levels below predetermined thresholds.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the temperature of the aerosol-forming substrate is increased to ensure adequate aerosol generation, then the aerosol production is improved, but combustion of the substrate occurs leading to undesirable aerosol constituents
Solution Approach 1:
The system employs a combustion gas detector that continuously monitors combustion gas levels (such as CO or NOx) in the generated aerosol. The controller receives signals from the detector and adjusts the heater power accordingly - reducing power when combustion gas levels exceed a first threshold and stopping power when levels exceed a second threshold. This closed-loop feedback mechanism ensures aerosol generation is maintained while preventing combustion-related harmful constituents.
Solution Approach 2:
The system dynamically changes the operating parameters (heater power supply) based on real-time monitoring of combustion gas levels. By adjusting the power parameter in response to detected combustion indicators, the system maintains optimal temperature for aerosol generation without allowing conditions that lead to combustion and harmful constituent formation.
2Object-generated harmful factors
If the temperature is maintained within a predetermined range to prevent combustion, then harmful factors are reduced, but the device cannot adapt to different aerosol-forming substrates with varying combustion characteristics
Solution Approach 1:
The system uses the combustion gas detector to automatically detect and assess the combustion characteristics of whatever substrate the user inserts. The controller self-adjusts the heater power based on real-time feedback from the detector, eliminating the need for pre-programmed substrate-specific parameters. This allows the device to adapt to different substrates (tobacco, herbs, etc.) with varying moisture contents and combustion properties without user intervention or device reconfiguration.
3Object-generated harmful factors
If a combustion gas detector and dynamic power control system is added, then aerosol quality is improved, but device complexity increases
Solution Approach 1:
The system replaces complex mechanical temperature control mechanisms with a simpler electronic feedback system. Instead of using multiple temperature sensors, complex thermal management hardware, or substrate-specific mechanical adjustments, the invention uses a combustion gas detector (optical or electrochemical sensor) combined with electronic power control to achieve precise aerosol quality management. This substitution of mechanical/thermal control with sensor-based feedback simplifies the overall device architecture while improving performance.
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 reduces undesirable aerosol constituents by dynamically controlling heater power based on combustion gas levels, ensuring consistent aerosol quality across different aerosol-forming substrates, thereby preventing combustion and enhancing user experience.
Implementation Method 1
an aerosol-generating device configured to heat an aerosol-forming substrate
Implementation Method 2
a combustion gas detector, wherein the controller is connected to the combustion detector and is configured to monitor a level of combustion gas based on signals from the combustion gas detector
Implementation Method 3
the controller is configured to reduce the supply of power to the heater when the level of combustion gas exceeds a first threshold gas level
Data Source
AI summary
An aerosol-generating device configured to heat an aerosol-forming substrate is provided, including a power supply, a heater, a controller configured to control a supply of power from the power supply to the heater, and a combustion gas detector, wherein the controller is connected to the combustion detector and is configured to monitor a level of combustion gas based on signals from the combustion gas detector.