Induction Susceptor Structure for Rapid Aerosol Heating
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Solution Overview
Problem
Current aerosol generating devices face challenges in rapidly heating aerosol substrates while maintaining energy efficiency, which is crucial for generating a vapour that cools and condenses into an aerosol for inhalation.
Innovation Solution
The aerosol generating device incorporates a susceptor structure with inductively heatable susceptors embedded in the chamber wall, allowing for secure mounting and efficient heat transfer through thermal conduction, along with air channels for enhanced airflow, to rapidly and effectively heat the aerosol substrate without burning it.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If an induction heating system with a susceptor is used to rapidly heat the aerosol generating substrate, then the heating speed and temperature attainment are improved, but the energy efficiency and heat loss control deteriorate
Solution Approach 1:
The susceptor structure comprises multiple discrete susceptors positioned at specific locations around the heating chamber interior surface, allowing localized heating zones that can be independently controlled. This enables rapid heating of specific substrate regions while minimizing overall energy consumption and heat loss to surrounding structures.
Solution Approach 2:
The heating system is divided into multiple separate susceptor elements rather than using a single large susceptor or conventional heating element. This segmentation allows for more precise control of heat distribution, improving both heating speed for the substrate while maintaining better energy efficiency through targeted heating zones.
2Strength
If the susceptor is securely mounted to the chamber wall for stable heat transfer, then the thermal conduction efficiency is improved, but the device complexity and manufacturing difficulty increase
Solution Approach 1:
The mounting portions are integrated directly into the chamber wall structure, combining the mounting function with the chamber wall itself. This eliminates separate mounting components and simplifies manufacturing, while still providing secure attachment for the susceptor elements to ensure stable thermal conduction.
Solution Approach 2:
The mounting portions act as intermediary structures embedded in the chamber wall that facilitate both mechanical attachment and thermal conduction between the susceptor and chamber wall. This dual-function design simplifies the overall structure while maintaining both mounting stability and heat transfer efficiency.
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 configuration enables rapid and controlled heating of the aerosol substrate, maximizing energy efficiency and ensuring a consistent supply of vapour for inhalation while preventing combustion, thus providing a more efficient and user-friendly aerosol generation experience.
Implementation Method 1
electrical energy is supplied to the induction coil, which generates an alternating electromagnetic field. The susceptor couples with the electromagnetic field to induce local eddy currents and/or larger scale circulating currents to flow in the susceptor
Implementation Method 2
The flow of currents in the susceptor generates resistive heating
Implementation Method 3
Depending on the material of the susceptor, it may also undergo heating by magnetic hysteresis
Implementation Method 4
Heat is transferred from the susceptor to the aerosol generating substrate, for example by thermal conduction
Implementation Method 5
heating an aerosol generating substrate to a temperature typically in the range 150° C. to 300° C., without burning or combusting the aerosol generating substrate, generates a vapour which typically cools and condenses to form an aerosol for inhalation
Implementation Method 6
the susceptor structure further comprises mounting portions embedded in the chamber wall
Data Source
AI summary
An aerosol generating device includes a heating chamber for receiving an aerosol generating substrate, the heating chamber including a chamber wall. A susceptor structure includes one or more inductively heatable susceptors disposed around the chamber wall and exposed to an interior volume of the heating chamber. Portions of the susceptor structure may extend from the chamber wall into the interior volume to support the aerosol generating substrate. Mounting portions of the susceptor structure are embedded in the chamber wall, for example by moulding the chamber wall around the mounting portions. The mounting portions may be provided by connector portions that connect different susceptors to each other mechanically and/or electrically.