Dual-Frequency Coil Heating for Aerosol Substrate Temperature Control
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Solution Overview
Problem
There is a growing demand for alternative methods to generate an aerosol without burning cigarettes, and existing heating-type aerosol generating devices face challenges in efficiently and efficiently heating aerosol substrates.
Innovation Solution
An electronic device with a controller, heater, and inverter unit that generates a simultaneous dual-frequency current to heat aerosol generating substrates using a coil, where a rectifier adjusts DC, and first and second inverters produce AC frequencies, synthesizing them to create an eddy current for selective heating of substrate portions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a single-frequency current is used to heat the aerosol generating substrate, then the heating process is simple, but the heating efficiency and temperature distribution are insufficient
Solution Approach 1:
The heating current is segmented into multiple frequency components (first frequency and second frequency) that are applied simultaneously to different portions of the aerosol generating substrate. This segmentation allows independent optimization of heating effectiveness for each substrate portion, improving overall heating efficiency without requiring complex multi-stage heating systems.
Solution Approach 2:
The patent employs periodic alternating currents with different frequencies to achieve dynamic heating control. By using periodic action with varying frequencies, the system optimizes eddy current induction in different substrate portions, enhancing heating efficiency while maintaining relatively simple circuit implementation through standard inverter technology.
2Productivity
If high temperature heating is applied to the aerosol generating substrate, then aerosol generation is effective, but burning may occur
Solution Approach 1:
The patent applies local quality by using different frequency currents for different portions of the aerosol generating substrate. The first frequency current targets specific regions while the second frequency current targets other regions, allowing localized temperature control. This prevents any single portion from reaching burning temperatures while ensuring adequate aerosol generation across the entire substrate.
Solution Approach 2:
The system changes the frequency parameter of the heating current to control temperature distribution. By adjusting which frequency components are applied to which substrate portions, the system optimizes heating effectiveness for aerosol generation while preventing temperature escalation that would lead to burning. This parameter-based control provides a safe operating window.
3Ease of operation
If uniform heating is applied to the entire substrate, then the heating process is simple, but selective heating of different substrate portions is not achieved
Solution Approach 1:
The substrate heating is segmented by applying different frequency currents to different portions simultaneously. The first inverter generates a first frequency current for a first portion of the substrate, while the second inverter generates a second frequency current for a second portion. This segmentation enables selective heating control while maintaining operational simplicity through independent inverter control.
Solution Approach 2:
The system introduces dynamics by allowing independent control of frequency and amplitude for each inverter output. This dynamic control capability enables selective heating of different substrate portions based on real-time requirements, while the modular inverter architecture keeps the control system manageable and not overly complex.
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 method allows for efficient and controlled heating of aerosol generating substrates, generating an aerosol effectively while minimizing power consumption and preventing burning, with temperature control for uniform nicotine and glycerin delivery.
Implementation Method 1
An eddy current may be generated in the at least a portion of the aerosol generating substrate by the current, and the aerosol generating substrate may be heated by the eddy current
Implementation Method 2
a heater configured to heat at least a portion of an aerosol generating substrate inserted into the electronic device using the current
Implementation Method 3
a rectifier configured to adjust an output of a direct current (DC) to be supplied to the inverter unit
Implementation Method 4
a first inverter configured to generate a first alternating current (AC) having a first frequency based on the DC, a second inverter configured to generate a second AC having a second frequency based on the DC
Data Source
Figure 1~2
Figure 3~4
Figure 5~6
AI summary
In order to heat an aerosol generating substrate, an eddy current is generated in a susceptor of the aerosol generating substrate by generating a synthesized alternating current (AC) having different frequencies and supplying the synthesized AC to a coil wound around the aerosol generating substrate.