Induction Coil Self-Resonant Frequency Detection for Aerosol Control
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Solution Overview
Problem
Existing aerosol generating systems lack efficient control mechanisms to optimize aerosol characteristics, leading to suboptimal performance and user experience.
Innovation Solution
An aerosol generating system that utilizes an induction heatable susceptor and coil, with a controller detecting the self-resonant frequency of the coil to control power supply, allowing for precise temperature management and aerosol generation without the need for additional sensors, enabling enhanced control and detection of aerosol quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If traditional temperature control methods with separate sensors are used, then temperature monitoring is achieved, but device complexity increases
Solution Approach 1:
The patent combines the temperature monitoring function with the existing induction coil by detecting changes in its self-resonant frequency. The coil serves dual purposes: generating electromagnetic fields for heating and acting as a sensor for temperature detection through frequency shifts, thereby eliminating the need for separate temperature sensors and reducing overall system complexity.
Solution Approach 2:
The induction coil is designed to perform multiple functions: it generates electromagnetic fields for inductive heating of the susceptor and simultaneously serves as a temperature sensor by detecting self-resonant frequency changes. This multi-functionality reduces the number of components needed in the system.
2Reliability
If additional sensors are added for aerosol quality detection, then aerosol characteristics can be optimized, but device weight increases
Solution Approach 1:
The system uses the induction coil's own electrical characteristics (self-resonant frequency) to detect temperature and infer aerosol quality. The coil 'services itself' by providing both the heating function and the sensing function, eliminating the need for additional external sensors that would increase device weight.
3Manufacturing precision
If multiple separate control systems are used for heating and monitoring, then control precision is improved, but device size increases
Solution Approach 1:
The patent merges the heating control and temperature monitoring systems into a single integrated control mechanism. The controller monitors the self-resonant frequency of the induction coil to determine temperature, allowing precise control of the heating process without requiring separate sensor circuits or control pathways, thus maintaining compact device dimensions.
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 simplifies the control system, providing a more compact, efficient, and lightweight aerosol generating device that optimizes aerosol characteristics and detects changes in aerosol quality, ensuring consistent and optimal performance.
Implementation Method 1
an induction coil arranged to generate a time varying electromagnetic field for inductively heating the induction heatable susceptor
Implementation Method 2
an induction coil arranged to generate a time varying electromagnetic field for inductively heating the induction heatable susceptor
Implementation Method 3
the controller is arranged to detect the self-resonant frequency of the induction coil and to control the operation of the aerosol generating system based on the detected self-resonant frequency
Implementation Method 4
The susceptor couples with the electromagnetic field and generates heat which is transferred, for example by conduction, to the aerosol generating material
Implementation Method 5
adapted to heat the aerosol generating material, without burning the aerosol generating material, to volatise at least one component of the aerosol generating material and thereby generate an aerosol for inhalation by a user
Data Source
AI summary
An aerosol generating system includes an induction heatable susceptor, an induction coil arranged to generate a time varying electromagnetic field for inductively heating the induction heatable susceptor, a power source for supplying power to the induction coil and a controller. The controller is arranged to detect the self-resonant frequency of the induction coil and to control the operation of the aerosol generating system based on the detected self-resonant frequency. An aerosol generating device is also described.