Nested Induction Coils for Compact Aerosol Heating
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Solution Overview
Problem
Existing aerosol generating devices face challenges in enhancing the magnetic field strength of induction coils, improving the fitting and structural stability of these coils, and reducing the risk of disconnection.
Innovation Solution
The device incorporates an inner and outer induction coil configuration, where the outer coil extends from the inner coil, increasing the number of turns without increasing the vertical length, and a sensing coil is positioned to enhance sensitivity and reduce noise interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a single induction coil is used, then the structure is simple, but the magnetic field strength is insufficient
Solution Approach 1:
The patent implements a nested coil configuration where an inner coil is positioned inside an outer coil, both wound around the heater. This nested arrangement allows the magnetic fields of both coils to superimpose and reinforce each other, significantly increasing the overall magnetic field strength without requiring a single excessively complex coil design.
Solution Approach 2:
The induction coil system is segmented into two distinct coils (inner coil and outer coil) with different winding configurations. The inner coil has a smaller radius and different number of turns compared to the outer coil, allowing each segment to contribute differently to the overall magnetic field generation, thereby achieving stronger and more uniform heating.
2Strength
If the vertical length of the induction coil is increased to increase the number of turns, then the magnetic field strength increases, but the device height increases
Solution Approach 1:
Instead of increasing the vertical length of a single coil, the patent transitions to a two-dimensional radial arrangement with inner and outer coils wound around the heater at different radii. This dimensional change allows increasing the effective number of turns and magnetic field strength without proportionally increasing the vertical height of the device.
3Ease of manufacture
If the induction coil structure is simplified, then the manufacturing is easier, but the fitting and structural stability deteriorate
Solution Approach 1:
The patent incorporates a preliminary positioning structure where the induction coil is pre-formed with a specific shape that matches the heater geometry. This preliminary shaping ensures proper fitting and alignment before final assembly, maintaining structural stability and connection reliability while keeping the manufacturing process straightforward.
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 strengthens the magnetic field, improves fitting and structural stability, and reduces the risk of coil disconnection while enhancing sensing accuracy and convenience in maintenance.
Implementation Method 1
an induction coil positioned around the insertion space and being configured to cause the heater to generate heat
Implementation Method 2
an induction coil includes: an inner coil positioned around at least a portion of the insertion space; and an outer coil extending from the inner coil and positioned around at least a portion of the inner coil and the insertion space
Data Source
AI summary
An aerosol generating device is provided. The aerosol generating device includes: a body shaped to define an insertion space; a heater located within the insertion space; and an induction coil positioned around the insertion space and being configured to cause the heater to generate heat, wherein the induction coil comprises: an inner coil positioned around at least a portion of the insertion space; and an outer coil extending from the inner coil and positioned around at least a portion of the inner coil and the insertion space, and at an outer side of the inner coil.