Microwave Aerosol Heating with Moisture-Based Frequency Control
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Solution Overview
Problem
Existing aerosol generating devices using dielectric heating methods face challenges in maintaining optimal atomization performance due to variations in the medium state of the aerosol-generating article, particularly with moisture content affecting user experience.
Innovation Solution
An aerosol generating device with an oscillating unit generating microwaves, a resonating unit, and a sensor unit to identify the medium state, adjusting microwave frequencies based on moisture and glycerin content to optimize heating.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If dielectric heating method is used to heat aerosol-generating substance, then heating efficiency is improved, but temperature control precision deteriorates when medium state varies
Solution Approach 1:
The patent applies dynamics by making the microwave frequency adjustable rather than fixed. The processor dynamically changes the microwave frequency based on real-time detection of the aerosol-generating substance's medium state (moisture content, glycerin content), allowing the system to adapt to varying material properties and maintain optimal heating conditions throughout the heating process.
Solution Approach 2:
The patent implements feedback through a sensor unit that continuously detects the medium state of the aerosol-generating substance and feeds this information back to the processor. The processor uses this feedback to adjust microwave frequency in real-time, creating a closed-loop control system that maintains precise temperature control despite variations in material composition.
2Device complexity
If fixed microwave frequency is used, then device complexity is reduced, but atomization performance deteriorates when medium state changes
Solution Approach 1:
The system transitions from a static fixed-frequency design to a dynamic adjustable-frequency design. The processor modifies microwave frequency based on detected medium state parameters, enabling the system to maintain optimal atomization performance across different material conditions without requiring multiple fixed-frequency devices.
Solution Approach 2:
The patent changes the operating parameter (microwave frequency) based on the state of the material being processed. By adjusting frequency according to moisture content and glycerin content, the system optimizes heating and atomization performance for varying medium states, improving reliability without proportionally increasing device complexity.
3Speed
If high power microwave is used to heat quickly, then heating speed is improved, but heat sensation to user increases
Solution Approach 1:
The patent employs periodic action by dividing the heating process into distinct phases (preheating section and smoking section) with different microwave frequencies. The preheating section uses a first frequency optimized for rapid heating of moisture and glycerin, while the smoking section uses a second frequency optimized for atomization, thereby controlling heat delivery to reduce excessive heat sensation while maintaining heating speed.
Solution Approach 2:
The system dynamically adjusts microwave frequency based on the heating phase and detected medium state. During preheating, the system uses a frequency optimized for rapid heating, while during the smoking phase, it switches to a frequency that maintains temperature without causing excessive heat sensation, allowing the system to optimize heating speed at different stages of the process.
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 provides a temperature profile tailored to the medium state, enhancing user experience by adjusting microwave frequencies to maintain optimal atomization performance and reduce heat sensation.
Implementation Method 1
a dielectric heating-type aerosol generating device refers to a device capable of generating heat in a dielectric material included in an aerosol generating substance through microwave resonance, and heating the aerosol generating substance through the heat generated from the dielectric material
Implementation Method 2
generating heat in a dielectric material included in an aerosol generating substance through microwave resonance
Implementation Method 3
Water has a higher specific heat than air, and at the same temperature, water has a higher heat capacity than air. Accordingly, when a user inhales aerosol with a high moisture content, the user may experience a stronger sensation of heat compared to inhaling air at the same temperature
Data Source
AI summary
An aerosol generating device includes an oscillating unit configured to generate microwaves, a resonating unit including an accommodation space for accommodating an aerosol-generating article and configured to resonate the microwaves to heat the aerosol-generating article, a sensor unit configured to identify a state of a medium of a tobacco rod included in the aerosol-generating article, and a processor configured to adjust a frequency of the microwaves according to the identified state of the medium. The processor is further configured to, when the state of the medium is greater than or equal to a preset threshold, in a preheating section, control the oscillating unit to generate microwaves having a first frequency corresponding to moisture included in the medium, and in a smoking section, control the oscillating unit to generate microwaves having a second frequency corresponding to glycerin included in the medium.