Inductive Susceptor Heating With Insulated Overheat Sensing
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Solution Overview
Problem
Existing aerosol generating systems face challenges in efficiently and safely heating aerosol generating materials without overheating, which can lead to inefficient aerosol production and potential safety hazards.
Innovation Solution
The system employs an inductive element to heat a susceptor arrangement, with an insulating member thermally isolating the susceptor from the inductive element. A temperature sensor monitors the temperature, and a control arrangement takes action if the susceptor is determined to be overheating by comparing the measured temperature to a threshold value.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the inductive element directly heats the susceptor arrangement, then heating efficiency is improved, but the risk of overheating and safety hazards increases
Solution Approach 1:
A thermal insulating member is introduced as an intermediary between the inductive heating element and the susceptor arrangement. This insulating member allows efficient heat transfer to the susceptor while preventing excessive heat accumulation that would cause overheating, thus resolving the contradiction between heating efficiency and overheating risk
Solution Approach 2:
A temperature sensor continuously monitors the temperature of the susceptor arrangement and provides feedback to a control arrangement. When the temperature exceeds a predetermined threshold, the control arrangement adjusts the heating power accordingly, preventing overheating while maintaining efficient heating operation
2Measurement precision
If a temperature sensor is placed in direct contact with the susceptor arrangement for accurate temperature monitoring, then measurement precision is improved, but the sensor is exposed to excessive heat and potential damage
Solution Approach 1:
The thermal insulating member serves as a mediator that thermally isolates the temperature sensor from the hot susceptor arrangement while still allowing the sensor to accurately measure the susceptor temperature. This protects the sensor from excessive heat exposure while maintaining measurement precision
Solution Approach 2:
Instead of placing the sensor in direct contact with the susceptor, the temperature sensor is positioned in a different spatial location (thermally isolated by the insulating member) while still capturing the relevant temperature information through the insulating member's thermal properties
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 effectively prevents overheating of the susceptor, ensuring consistent and efficient aerosol generation while providing a safety mechanism to protect the system from potential overheating issues.
Implementation Method 1
an inductive element for inductively heating a susceptor arrangement to heat an aerosol generating material to thereby generate an aerosol
Implementation Method 2
an insulating member which in use is located between the inductive element and the susceptor arrangement to thermally insulate the susceptor arrangement from the inductive element
Data Source
AI summary
Apparatus for an aerosol generating system comprises an inductive element for inductively heating a susceptor arrangement to heat an aerosol generating material to thereby generate an aerosol, an insulating member which in use is located between the inductive element and the susceptor arrangement to thermally insulate the susceptor arrangement from the inductive element; a temperature sensor for measuring a temperature at a location in the system insulated in use from the susceptor arrangement by the insulating member, and a control arrangement. The control arrangement is configured to monitor the temperature measured by the temperature sensor and take a control action if, based on the temperature measured by the temperature sensor, the control arrangement determines that the susceptor arrangement is overheating.