Inductive Heating Circuit Voltage Regulation for Aerosol Generation
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Solution Overview
Problem
Existing aerosol-generating devices face challenges in efficiently controlling the heating process for aerosol generation, as they often require precise temperature management and energy transfer to prevent combustion while ensuring efficient aerosol production.
Innovation Solution
The apparatus employs an inductive heating circuit with a resonant LC circuit, a voltage regulator, and a control arrangement to adjust the DC voltage supplied to the inductive heating circuit, allowing for efficient heating of a susceptor arrangement to generate aerosols without combustion, using a varying current and voltage regulation to optimize energy transfer.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If a varying current is supplied to the inductive heating circuit to heat the susceptor arrangement, then aerosol generation is achieved, but precise temperature control becomes difficult
Solution Approach 1:
The patent applies dynamics by making the DC voltage supplied to the inductive heating circuit adjustable and variable over time. The control arrangement dynamically modifies the DC voltage level to precisely control the heating power, allowing temperature regulation without requiring complex AC waveform generation circuits. This dynamic voltage adjustment enables precise temperature control while maintaining relatively simple circuit architecture.
2Productivity
If the heating power is increased to improve aerosol generation efficiency, then more aerosol is produced, but the risk of combustion increases
Solution Approach 1:
The patent applies parameter changes by dynamically adjusting the DC voltage level supplied to the inductive heating circuit. The control arrangement modifies the voltage parameter in real-time to optimize heating power, ensuring sufficient aerosol generation while preventing excessive temperature rise that could lead to combustion. This parameter control approach allows efficient aerosol production with controlled safety margins.
3Loss of energy
If a resonant LC circuit is used to improve heating efficiency, then energy transfer is optimized, but the circuit becomes more sensitive to frequency variations
Solution Approach 1:
The patent applies feedback by incorporating a control arrangement that monitors the operation of the resonant LC circuit and adjusts the DC voltage accordingly. This feedback mechanism compensates for frequency variations and maintains optimal resonant conditions, ensuring high heating efficiency while mitigating the sensitivity issue. The control system detects deviations and corrects them by modifying the voltage supply to maintain stable operation.
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 solution enables precise control over the heating process, ensuring efficient aerosol generation within a desired temperature range without combustion, thereby improving the performance and safety of aerosol-generating devices.
Implementation Method 1
an inductive element configured to inductively heat the susceptor arrangement when a varying current flows through the inductive element
Implementation Method 2
The resonant LC circuit may be configured to operate at a resonant frequency of the LC resonant circuit to heat the susceptor arrangement
Data Source
AI summary
An apparatus for an aerosol generating device includes an inductive heating circuit (150) configured to inductively heat a susceptor arrangement arranged to heat an aerosol generating material, to thereby generate an aerosol. The inductive heating circuit includes an inductive element (158) configured to inductively heat the susceptor arrangement when a varying current flows through the inductive element, and a switching arrangement (180) for causing the varying current to flow through the inductive element when a first DC voltage is supplied to the inductive heating circuit (150). A voltage regulator (154) is configured to receive an input voltage from a voltage supply (104) and output the first DC voltage across the inductive heating circuit. A control arrangement (106) is configured to adjust the first DC voltage output by the voltage regulator, thereby to adjust a power supplied to the heating circuit (150) for heating the susceptor arrangement. An aerosol generating system and a method of operating an aerosol generating system are also provided.