Induction-Heated Aerosol Device Coil Frequency Tuning
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Solution Overview
Problem
Existing aerosol generating devices face challenges in efficiently determining the optimal frequency of current flowing through a coil, which affects the heating efficiency of the susceptor, due to the interaction of various hardware components.
Innovation Solution
An aerosol generating device and method that utilize a controller to adjust the frequency of the current within a pre-set range, identifying an optimum frequency by monitoring current magnitude and setting thresholds, thereby optimizing coil heating efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If the frequency of current flowing through the coil is optimized to increase current magnitude, then heating efficiency of the susceptor is greatly increased, but the complexity of controlling and determining the optimum frequency increases due to interactions among various hardware components
Solution Approach 1:
The patent applies preliminary action by pre-setting multiple frequency ranges (first frequency range, second frequency range, third frequency range) before the actual frequency optimization process. The controller is configured to sequentially test frequencies within these pre-defined ranges, starting from the first frequency range, then moving to the second and third ranges if needed. This preliminary structuring of frequency ranges simplifies the control process by providing a systematic search methodology, avoiding the need for complex real-time analysis of hardware interactions.
Solution Approach 2:
The patent implements feedback by continuously monitoring the magnitude of current flowing through the coil at each tested frequency and comparing it against a predetermined threshold value. The controller adjusts the frequency based on this feedback - when the current magnitude exceeds the threshold, the system identifies that frequency as optimal and stops searching. This feedback mechanism simplifies control complexity by providing clear stop criteria and automated adjustment, eliminating the need for complex manual tuning or sophisticated control algorithms.
2Adaptability or versatility
If various hardware components are included in the aerosol generating device, then the device functionality is enhanced, but the difficulty of efficiently searching for and determining the optimum frequency increases
Solution Approach 1:
The patent applies segmentation by dividing the overall frequency search space into multiple discrete frequency ranges (first frequency range, second frequency range, third frequency range). Each range contains specific frequencies that are tested sequentially. This segmentation approach makes the frequency optimization process manageable despite the presence of various interacting hardware components, as it breaks down the complex search problem into smaller, systematic steps rather than requiring simultaneous analysis of all hardware interactions.
Solution Approach 2:
The patent utilizes parameter changes by systematically varying the frequency parameter across different predefined ranges while monitoring the current magnitude response. The controller changes the frequency from one value to another within and across different frequency ranges, observing how the current magnitude changes in response. This method of parameter variation provides a straightforward way to handle the complexity introduced by multiple hardware components, as it relies on empirical measurement and comparison rather than complex theoretical modeling of hardware interactions.
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
Facilitates easy identification of the optimal frequency for the coil current, enhancing heating efficiency and optimizing the operation of induction heating-based aerosol generating devices.
Implementation Method 1
when an alternating current is allowed to flow through a coil having a unique inductance, an alternating magnetic field is generated to induce an eddy current in a nearby susceptor
Implementation Method 2
an alternating magnetic field is generated to induce an eddy current in a nearby susceptor so that the susceptor is heated by the induced eddy current
Implementation Method 3
the heater using the coil and the susceptor is realized based on a principle that, when an alternating current is allowed to flow through a coil having a unique inductance, an alternating magnetic field is generated to induce an eddy current in a nearby susceptor
Data Source
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AI summary
An aerosol generating device includes: a coil configured to generate a magnetic field by a current flowing through the coil; a heater configured to be induction heated via the magnetic field; and a controller configured to control the current. The controller is further configured to change a frequency of the current flowing through the coil within a pre-set driving frequency range; and determine whether a magnitude of the current flowing through the coil exceeds a threshold value according to one or more changed frequencies of the current.