Induction Heating Control for Stable Aerosol Pre-Heating
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Solution Overview
Problem
Existing electromagnetic induction heating devices for aerosol generation in low-temperature cigarette alternatives experience inconsistent pre-heating speeds due to battery voltage degradation, affecting the inhalation experience.
Innovation Solution
An aerosol generating device with a controller that adjusts the duty ratio and/or frequency of a pulse signal based on real-time battery voltage, using a switch circuit and resonant circuit with an inductor and capacitor to maintain consistent heating, comprising a susceptor heated by a varying magnetic field for aerosol production.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If electromagnetic induction heating is used to heat the susceptor, then aerosol can be generated, but the pre-heating speed becomes inconsistent as battery voltage decreases over time
Solution Approach 1:
The patent applies dynamics by making the pulse signal parameters (duty ratio and/or frequency) adjustable and variable over time. The controller dynamically changes these parameters based on battery voltage levels, transforming a static heating system into a dynamic one that adapts to changing conditions, thereby maintaining consistent pre-heating speed throughout battery discharge cycles
Solution Approach 2:
The patent directly implements parameter changes by modifying the duty ratio and/or frequency of the pulse signal driving the switch circuit. When battery voltage decreases, the controller adjusts these electrical parameters to compensate for the voltage drop, ensuring the heating power remains sufficient to maintain consistent pre-heating speed and reliable aerosol generation
2Use of energy by moving object
If battery voltage decreases with use time, then energy is conserved, but pre-heating speed becomes inconsistent affecting user experience
Solution Approach 1:
The patent implements feedback by continuously monitoring battery voltage and using this information to adjust the pulse signal parameters. The controller creates a closed-loop control system where voltage feedback triggers automatic parameter adjustments, ensuring heating performance remains consistent despite battery discharge, thereby maintaining good inhalation experience throughout the battery's life cycle
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 solution ensures consistent pre-heating speeds and improves the inhalation experience by dynamically adjusting the pulse signal parameters in response to battery voltage changes, maintaining optimal heating performance.
Implementation Method 1
the inductor generates a varying magnetic field
Implementation Method 2
a susceptor, configured to be penetrated by the varying magnetic field to generate heat
Data Source
AI summary
An aerosol generating device and a control method thereof are provided. The aerosol generating device includes: a battery cell, configured to provide a direct current; an inverter, including a switch circuit and a resonant circuit, where the resonant circuit includes an inductor and a capacitor; and the switch circuit is configured to be alternately turned on and turned off under driving of a pulse signal, so that an alternating current flows through the inductor in the resonant circuit and the inductor generates a varying magnetic field; a susceptor, configured to be penetrated by the varying magnetic field to generate heat, to heat an inhalable material to generate an aerosol; and a controller, configured to adjust a duty ratio and/or a frequency of the pulse signal based on a real-time voltage of the battery cell.