Induction Coil Thermal Insulation for Aerosol Heating
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Solution Overview
Problem
Induction heating arrangements in aerosol-generating devices suffer from reduced operational and heating efficiency due to increased electrical resistance and heat loss, which affects the energy efficiency of the device.
Innovation Solution
Incorporating a thermally insulating element between the susceptor arrangement and the induction coil, with air apertures allowing axial airflow to improve thermal insulation and prevent lateral airflow, coupled with a controlled induction heating system using multiple induction coils and a flux concentrator to optimize heating efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If induction heating arrangement is used to heat aerosol-forming substrate, then heating efficiency is improved, but electrical resistance of induction coil increases and heat is lost
Solution Approach 1:
A thermally insulating element is introduced as an intermediary between the susceptor arrangement and the induction coil. This insulating element prevents direct thermal contact, reducing heat loss from the induction coil while maintaining the heating function. The insulating element acts as a mediator that manages heat transfer to improve overall energy efficiency.
Solution Approach 2:
The patent modifies the thermal parameters of the system by introducing a thermally insulating element with specific thermal conductivity properties. This changes the heat transfer characteristics between the susceptor arrangement and induction coil, reducing unwanted heat loss while maintaining effective heating of the aerosol-forming substrate.
2Power
If induction heating arrangement is used, then heating capability is improved, but operational efficiency decreases due to increased electrical resistance
Solution Approach 1:
The thermally insulating element serves as a mediator that manages thermal energy distribution in the system. By controlling heat flow between the susceptor arrangement and induction coil, it helps maintain operational efficiency while preserving the heating capability of the induction system.
Solution Approach 2:
The introduction of the insulating element changes the thermal parameter distribution in the system, reducing energy losses and improving operational efficiency while maintaining the required heating capability for aerosol generation.
3Loss of energy
If thermally insulating element is added to reduce heat loss, then energy efficiency is improved, but device complexity increases
Solution Approach 1:
The thermally insulating element is positioned between the susceptor arrangement and induction coil, serving as a mediator that reduces heat loss without significantly complicating the overall device structure. The insulating element integrates into the existing induction heating arrangement with minimal additional complexity.
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
Enhances the operational and heating efficiency of the aerosol-generating device by reducing heat loss and improving energy efficiency, while allowing for precise temperature control and uniform aerosol generation.
Implementation Method 1
a thermally insulating element (22). The thermally insulating element (22) is arranged between the susceptor arrangement (14) and the induction coil (16)
Implementation Method 2
The induction heating arrangement may comprise an induction coil (16) and a susceptor arrangement (14). For induction heating, the heating arrangement may comprise an induction coil (16) and a susceptor arrangement (14)
Implementation Method 3
The susceptor arrangement (14) is arranged at least partly surrounding the heating chamber (10). During operation, heating of the susceptor arrangement (14) may lead to an increase of temperature of the induction coil (16) in addition to heating the aerosol-generating article received in the heating chamber (10)
Data Source
AI summary
An aerosol-generating device is provided, including: a cavity to receive an aerosol-generating article including an aerosol-forming substrate, the cavity including a base, and the base including at least one air aperture; an induction heating arrangement including a susceptor arrangement and an induction coil, and being arranged at least partly surrounding or forming the cavity; and a thermally insulating element arranged between the susceptor arrangement and the induction coil, the thermally insulating element being sealingly attached to the base so as to prevent lateral airflow in a direction perpendicular to a longitudinal axis of the device into the cavity at the base of the cavity, and one or more sidewalls of the susceptor arrangement are permeable and configured for lateral airflow to enter the cavity in the direction perpendicular to the longitudinal axis of the device.