Induction Coil Movable Third Contact Variable Heating Zones
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Solution Overview
Problem
Existing aerosol-generating devices lack the ability to provide variable and switchable heating zones, limiting the control over the heating of aerosol-forming substrates, which can result in inefficient vaporization and inconsistent aerosol production.
Innovation Solution
The aerosol-generating device incorporates a heating arrangement with a movable third contact and a controller that allows for the establishment of multiple heating zones by altering the supply of alternating current between fixed and movable contacts, enabling adjustable and customizable heating zones, and a susceptor with metal strips for optimized induction heating.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a fixed induction coil is used for heating, then the structure is simple, but the heating zone cannot be adjusted or varied
Solution Approach 1:
The induction coil is divided into multiple segments with fixed contacts at different positions along its length. This segmentation allows the controller to activate only the necessary heating zones by selecting specific contact pairs, providing heating zone adjustability without requiring a completely reconfigurable coil structure.
Solution Approach 2:
The system transitions from a static, fixed heating configuration to a dynamic one where the controller can selectively activate different contact pairs based on the aerosol-generating article length and heating requirements. This enables real-time adjustment of heating zones while maintaining a relatively simple physical structure.
2Productivity
If the induction coil heats the entire aerosol-forming substrate uniformly, then the structure is simple, but the heating efficiency is reduced for different article lengths
Solution Approach 1:
Instead of uniform heating across the entire substrate, the system applies heating locally to specific zones determined by the article length and composition. The controller selects which contact pairs to activate, concentrating thermal energy where needed and avoiding waste on unused portions of the substrate.
Solution Approach 2:
The controller adjusts heating parameters by selecting different contact pairs and controlling the alternating current supply to match the aerosol-generating article characteristics. This allows optimization of heating efficiency for different article lengths and compositions without changing the physical coil structure.
3Adaptability or versatility
If multiple fixed contacts are provided along the induction coil, then variable heating zones are enabled, but the device complexity increases
Solution Approach 1:
The multiple fixed contacts along the induction coil serve multiple functions: they define heating zone boundaries, enable selective zone activation, and provide adaptability for different article lengths. This multi-functional contact system achieves heating zone configuration flexibility without requiring separate mechanisms for each function.
Solution Approach 2:
The patent replaces complex mechanical adjustment mechanisms with an electrical control system. Instead of physically moving or reconfiguring coil segments, the controller electronically selects which contact pairs to activate, achieving heating zone configuration through electrical switching rather than mechanical manipulation.
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 precise control over the heating of aerosol-forming substrates, ensuring uniform and efficient vaporization, reducing waste and improving aerosol quality by allowing for tailored heating profiles based on the substrate's composition and user preferences.
Implementation Method 1
The heating arrangement may be an induction heating arrangement and comprise an induction coil and a susceptor
Implementation Method 2
portion of heating element corresponding to and overlapping induction coil internally generates eddy currents and heat
Implementation Method 3
The heating arrangement may be an induction heating arrangement and comprise an induction coil and a susceptor
Data Source
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AI summary
The invention relates to an aerosol-generating device. The aerosol- generating device comprises a heating arrangement. The heating arrangement comprises an induction coil (10), a first contact (12), a second contact (16) and a third contact (20). The aerosol-generating device further comprises a controller (34). The first contact (12) is arranged contacting a proximal end (14) of the induction coil (10). The second contact (16) is arranged contacting a distal end (18) of the induction coil (10). The third contact (20) is arranged contacting the induction coil between the first contact (12) and the second contact (16). The first, second and third contacts are electrically connected to the controller (34). The controller (34) is configured to control supply of an alternating electrical current between only a pair of the first, second and third contacts. The first contact (12) and the second contact (16) are fixed contacts and the third contact (20) is configured as a movable contact.