Susceptor Temperature Control via LC Resonant Circuit Frequency
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing aerosol generating devices face challenges in accurately determining the temperature of the susceptor arrangement for efficient inductive heating, which affects the generation of aerosol quality and consistency.
Innovation Solution
The apparatus employs an LC resonant circuit with a switching arrangement and a temperature determiner that uses the frequency and DC voltage supply to calculate the effective grouped resistance of the susceptor arrangement, allowing for precise temperature determination through calibration equations, enabling efficient inductive heating.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If inductive heating is used to heat the susceptor arrangement, then heating efficiency is improved, but accurate temperature determination becomes more difficult
Solution Approach 1:
The system uses the LC resonant circuit frequency as a feedback mechanism to indirectly measure susceptor temperature. As the susceptor temperature changes, it affects the LC circuit's resonant frequency, providing continuous temperature information without direct contact measurement, thus resolving the contradiction between efficient inductive heating and accurate temperature monitoring
Solution Approach 2:
The LC resonant circuit serves as an intermediary between the inductive heating system and temperature measurement. Instead of directly measuring temperature in the high-frequency electromagnetic field environment, the system measures the LC circuit frequency which is influenced by the susceptor temperature, enabling accurate temperature determination while maintaining heating efficiency
2Measurement precision
If direct temperature measurement is implemented, then temperature control accuracy is improved, but device complexity increases
Solution Approach 1:
The patent uses the LC resonant circuit as an intermediary measurement system. Rather than implementing complex direct temperature sensors in the heating zone, the system measures the resonant frequency of the LC circuit which naturally responds to temperature changes in the susceptor, providing accurate temperature control with minimal additional complexity
Solution Approach 2:
The LC resonant circuit inherently provides temperature information through its frequency characteristics. The circuit's resonant frequency automatically changes with susceptor temperature, eliminating the need for separate complex measurement systems and enabling self-service temperature monitoring
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 ensures consistent and efficient aerosol generation by accurately controlling the temperature of the susceptor arrangement, enhancing the quality and reliability of the aerosol produced.
Implementation Method 1
an inductive element for inductively heating a susceptor arrangement
Implementation Method 2
a varying current to be generated from a DC voltage supply and flow through the inductive element to cause inductive heating of the susceptor arrangement
Implementation Method 3
a temperature determiner for, in use, determining a temperature of the susceptor arrangement based on a frequency that the LC resonant circuit is being operated at
Data Source
AI summary
Apparatus for an aerosol generating device includes an LC resonant circuit including an inductive element for inductively heating a susceptor arrangement to heat an aerosol generating material to thereby generate an aerosol. The apparatus includes a switching arrangement for enabling a varying current to be generated from a DC voltage supply and flow through the inductive element to cause inductive heating of the susceptor arrangement. The apparatus also includes a temperature determiner for, in use, determining a temperature of the susceptor arrangement based on a frequency that the LC resonant circuit is being operated at.