Segmented Aerosol Heater Control for Overheating Prevention
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Solution Overview
Problem
Aerosol generating devices with resistance heaters using electrically conductive tracks suffer from low power efficiency, overheating, and reduced lifespan due to inadequate temperature control.
Innovation Solution
The device incorporates a heater with a first and second heating region, each with its own electrically conductive track, controlled by a power supply to alternately power these tracks after a predetermined time, eliminating the need for a separate temperature sensor.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If a single electrically conductive track is used to heat the aerosol generating material, then the heating function is simple, but power efficiency is low and overheating occurs
Solution Approach 1:
The heater is divided into multiple independent heating regions, each with its own electrically conductive track. This segmentation allows different parts of the heater to operate independently, improving power efficiency by activating only the necessary heating regions and preventing overheating in any single area.
Solution Approach 2:
The controller activates the electrically conductive tracks in a sequential or periodic manner rather than simultaneously. By controlling the timing of power supply to each track, the system achieves better thermal management and power efficiency while avoiding continuous high-power operation that causes overheating.
2Reliability
If continuous power is supplied to the electrically conductive track, then aerosol generation is maintained, but the heater overheats and lifespan decreases
Solution Approach 1:
The controller supplies power to the electrically conductive tracks periodically or sequentially rather than continuously. This intermittent power supply allows thermal management, preventing excessive temperature rise while maintaining aerosol generation capability, thereby extending heater lifespan.
Solution Approach 2:
Multiple heating regions with independent tracks allow the system to distribute thermal load across different areas. When one region is activated, others can cool down, preventing localized overheating and extending overall heater reliability and lifespan.
3Ease of operation
If multiple electrically conductive tracks are used with independent control, then power efficiency and temperature control improve, but device complexity increases
Solution Approach 1:
The controller integrates multiple functions into a single component: it manages power distribution to multiple tracks, monitors heating status, and regulates temperature. This multi-functionality reduces the need for separate control circuits and sensors, maintaining ease of operation despite the presence of multiple heating tracks.
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 approach enhances power efficiency, prevents overheating, and increases durability and lifespan by independently controlling multiple tracks, ensuring stable temperature regulation.
Implementation Method 1
a resistance heater may include an electric resistor, wherein, when a current flows through the electric resistor, the resistance heater is heated
Data Source
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AI summary
An aerosol generating device includes a heater configured to generate aerosols by heating an aerosol generating material, a power supply configured to supply power to the heater, and a controller configured to control operations of the power supply and the heater, wherein the heater includes a sheet including a first heating region and a second heating region, a first track that is heated by receiving power and arranged in the first heating region, and a second track that is heated by receiving power and arranged in the second heating region, and the controller is further configured to control the power supply to supply power to the second track when a predetermined time has elapsed after starting to supply power to the first track.