Inductive Heating Coil Alignment in Aerosol Devices
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Solution Overview
Problem
Existing aerosol provision devices for smoking alternatives, such as heat-not-burn devices, face challenges in efficiently heating aerosol generating materials without burning them, requiring innovative heating mechanisms that effectively volatilize compounds without combustion.
Innovation Solution
The aerosol provision device employs an inductive heating assembly with a susceptor heated by a varying magnetic field generated by inductor coils, where the coils are precisely positioned and aligned within a chassis to optimize heating efficiency and minimize heat transfer to external components, using a coil wire end positioning arrangement to ensure proper alignment and insulation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If inductor coils are used to heat the susceptor via varying magnetic field, then heating efficiency is improved, but precise positioning and alignment of coil wire ends becomes more complex
Solution Approach 1:
The chassis includes pre-formed positioning arrangements (such as positioning holes, tabs, or grooves) that are prepared in advance during manufacturing. These positioning features guide the coil wire ends to their correct locations before final assembly, eliminating the need for complex alignment procedures during device assembly and ensuring precise positioning for optimal heating efficiency.
Solution Approach 2:
The patent introduces intermediate positioning structures (such as insulating positioning elements or alignment fixtures) that mediate between the coil wire ends and the chassis. These intermediaries simplify the positioning process by providing clear alignment references and holding mechanisms, reducing the complexity of assembling the inductor coil assembly while maintaining precise positioning for efficient heating.
2Productivity
If the susceptor is heated to high temperatures (200°C-350°C) for efficient volatilization, then aerosol generation effectiveness is improved, but heat transfer to external components increases creating safety concerns
Solution Approach 1:
The heating system is segmented into distinct thermal zones. The susceptor and immediate surrounding components (such as the heater assembly) are designed to withstand high temperatures for effective aerosol generation, while external components (such as the chassis, housing, and user-contact surfaces) are thermally isolated through insulation layers or air gaps. This segmentation allows the internal heating zone to operate at 200°C-350°C for productivity while protecting external components from harmful heat transfer.
Solution Approach 2:
Thermal insulation materials or air gap intermediaries are introduced between the high-temperature susceptor/heater assembly and the external chassis components. These intermediaries act as thermal barriers that prevent excessive heat transfer to external surfaces, maintaining user safety while allowing the internal heating system to operate at the high temperatures necessary for effective aerosol generation.
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 allows for efficient heating of aerosol generating materials to temperatures between 200°C and 350°C, effectively volatilizing compounds while keeping the outer components at a safe temperature, enhancing the device's performance and user safety.
Implementation Method 1
the inductor coil is configured to generate the varying magnetic field; wherein the susceptor which is heatable by penetration with a varying magnetic field
Implementation Method 2
the aerosol provision device employs an inductive heating assembly with a susceptor heated by a varying magnetic field generated by inductor coils
Implementation Method 3
efficient heating of aerosol generating materials to temperatures between 200°C and 350°C, effectively volatilizing compounds
Implementation Method 4
the chassis comprises a coil wire end positioning arrangement configured to hold and align the coil wire end with respect to the electrical component
Data Source
AI summary
An aerosol provision device is described. The device comprises an aerosol generating assembly, an electrical component, which may be a printed circuit board (PCB) and a chassis holding the electrical component and the aerosol generating assembly. The aerosol generating assembly has: a heater assembly to receive aerosol generating material. The heater assembly has a susceptor which is heatable by penetration with a varying magnetic field; and an inductor coil extending around the heater assembly. The inductor coil generates the varying magnetic field. The inductor coil has a coil wire end engaged with the electrical component. The chassis has a coil end positioning arrangement to hold and align the coil wire end with the electrical component. The chassis itself is also described herein.