Rolled Microwave Radiating Unit for Compact Aerosol Heating
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Solution Overview
Problem
Aerosol-generating devices with microwave-shielding structures face issues of increased size and complexity due to the need for such structures, complicating assembly and design.
Innovation Solution
The device incorporates a radiating unit formed by curling a thin film antenna with a shielding portion on a sheet, surrounded by insulating layers and protective layers, and fixed by brackets, reducing size and preventing microwave leakage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a microwave-shielding structure is added to prevent microwave leakage, then the shielding effectiveness is improved, but the device size increases
Solution Approach 1:
The patent combines the microwave-shielding structure with the antenna structure by disposing the shielding portion adjacent to the antenna on the same substrate. This integration eliminates the need for separate shielding components, achieving effective microwave containment while maintaining a compact device size.
Solution Approach 2:
The shielding portion serves multiple functions: it prevents microwave leakage from the antenna, provides structural support, and acts as part of the overall device housing. This multi-functionality reduces the need for additional dedicated shielding components, thereby avoiding increased device volume.
2Object-affected harmful factors
If a microwave-shielding structure is added to prevent microwave leakage, then the shielding effectiveness is improved, but the device structure becomes more complicated
Solution Approach 1:
The shielding structure is merged with the antenna assembly, where the shielding portion is disposed adjacent to the antenna on the substrate. This integration reduces the number of separate components and simplifies the overall device structure while maintaining effective microwave shielding.
Solution Approach 2:
The patent employs a thin-film substrate that serves as both the mounting platform for the antenna and the shielding structure. This thin-film approach provides effective microwave containment without adding significant structural complexity or bulk to the device.
3Volume of stationary object
If the antenna and shielding portion are disposed spaced apart on a sheet and the sheet is rolled, then the radiating unit size is reduced, but the structural integrity may be compromised
Solution Approach 1:
The patent employs a curved or rolled configuration of the substrate sheet, transforming the flat antenna and shielding portion arrangement into a three-dimensional cylindrical or tubular radiating unit. This curvature provides structural rigidity and integrity while maintaining a compact volume, as the rolled structure inherently resists deformation.
Solution Approach 2:
The antenna and shielding portion are nested within the rolled substrate structure, with the antenna disposed at the center and the shielding portion surrounding it. This nested arrangement maximizes space utilization, provides structural support through the concentric layers, and maintains structural integrity while minimizing the radiating unit volume.
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 minimizes the device's size, maintains structural integrity, and effectively contains microwave emissions, enhancing assembly efficiency and device performance.
Implementation Method 1
an antenna surrounding the insertion space, the antenna being configured to emit microwaves for dielectrically heating the aerosol-generating article
Implementation Method 2
a shielding portion surrounding the antenna, the shielding portion being configured to prevent the microwaves from being emitted out of the radiating unit
Data Source
AI summary
Disclosed is an aerosol-generating device including a body and a radiating unit disposed in the body and formed to provide an insertion space accommodating an aerosol-generating article therein. The radiating unit includes a sheet elongated in a longitudinal direction, an antenna surrounding the insertion space, the antenna being configured to emit microwaves for dielectrically heating the aerosol-generating article, and a shielding portion surrounding the antenna, the shielding portion being configured to prevent the microwaves from being emitted out of the radiating unit. The radiating unit is configured such that the antenna and the shielding portion are disposed spaced apart from each other on the sheet in the longitudinal direction of the sheet and the sheet is rolled in the longitudinal direction.