Carbon Heater Temperature Sensing for Fast Aerosol Heating
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Solution Overview
Problem
Conventional aerosol-generating devices using carbonaceous materials face issues with rapid temperature increase, leading to unstable power supply circuits and inaccurate temperature measurement, while metal heaters consume excessive time and power.
Innovation Solution
An aerosol-generating device employing a carbonaceous material heater with a controller that measures resistance in a distinct section to determine temperature, using a constant voltage magnitude to minimize measurement interference and optimize heating efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If a heater made of carbonaceous material is used, then heating speed is improved, but temperature measurement accuracy deteriorates
Solution Approach 1:
The heater is divided into two distinct sections: a first section dedicated to temperature measurement and a second section dedicated to heating operations. This segmentation allows the measurement section to provide accurate temperature feedback without being affected by the rapid temperature changes in the heating section, while the heating section maintains high heating speed performance.
2Loss of time
If a heater made of carbonaceous material is used, then heating time is reduced, but power supply stability deteriorates
Solution Approach 1:
The controller uses temperature feedback from the first section to regulate power supply to the second section. By continuously monitoring the temperature in the measurement section and adjusting power accordingly, the system prevents excessive temperature rise and current spikes that would otherwise cause power supply instability, while maintaining rapid heating through efficient power control.
3Speed
If the heater is overheated to reach temperature quickly, then heating speed is improved, but temperature control accuracy deteriorates
Solution Approach 1:
By separating the heater into a measurement section and a heating section, the system can apply aggressive heating power to the heating section while simultaneously monitoring temperature in the measurement section to prevent overall overheating. This enables rapid heating without sacrificing temperature control accuracy.
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 reduces heating time, enhances user satisfaction, and accurately measures heater temperature, minimizing interference with the heating process.
Implementation Method 1
A carbonaceous material such as carbon nanotubes or graphene has high thermal conductivity compared to conventional general metals. If a heater made of a carbonaceous material is applied to an aerosol-generating device, it may take only a few seconds or less to generate heat to reach a temperature for generation of an aerosol.
Implementation Method 2
the controller determines a temperature of the heater based on a resistance value of the heater determined in a first section
Data Source
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AI summary
An aerosol-generating device is disclosed. The aerosol-generating device includes a body, a heater disposed in the body and including a carbonaceous material, a power supply configured to supply power to the heater, and a controller configured to control power supplied to the heater. The controller determines the temperature of the heater based on the resistance value of the heater determined in a first section, and controls power supplied to the heater to heat the heater in a second section different from the first section.