Sheet Heating Assembly with Spaced Delivery for Aerosol Control
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Solution Overview
Problem
Existing aerosol generating systems face challenges in controlling and repeatably delivering a predetermined amount of vaporized aerosol-forming substrate due to the use of wicks that lead to unpredictable substrate supply.
Innovation Solution
A vaporizing assembly with a sheet heating element and a delivery device spaced apart by an air gap, where the delivery device delivers the substrate directly to the sheet heating element, allowing controlled and uniform distribution, enhancing repeatability and controllability of aerosol generation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If a wick is used to supply aerosol-forming substrate to the heating element, then the substrate is delivered continuously, but the amount of substrate supplied cannot be controlled precisely
Solution Approach 1:
The patent removes the wick from the system entirely, replacing it with a direct delivery mechanism where the delivery device deposits the aerosol-forming substrate directly onto the heating element surface, eliminating the uncontrolled capillary action that prevented precise dosage control
Solution Approach 2:
The heating element serves dual functions: it acts as both the heating surface and the substrate distribution surface, with the delivery device depositing substrate directly onto the heating element which then self-vaporizes the material during normal operation
2Manufacturing precision
If the heating element is spaced apart from the delivery device, then controlled substrate delivery is achieved, but heat transfer efficiency may be reduced
Solution Approach 1:
The patent optimizes the spacing distance between the delivery device and heating element to achieve the right balance: sufficient separation for controlled substrate deposition while maintaining proximity for efficient heat transfer and immediate vaporization of the deposited material
Solution Approach 2:
The system uses periodic or pulsed delivery of the aerosol-forming substrate rather than continuous supply, allowing precise control over the amount deposited on the heating element while maintaining energy efficiency through timed vaporization cycles
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
The solution provides precise control over the amount of vaporized aerosol-forming substrate, ensuring consistent aerosol production with improved uniformity and efficiency.
Implementation Method 1
The heating element is spaced apart from the delivery device. The heating element is configured to heat the delivered liquid aerosol forming substrate to form an aerosol
Implementation Method 2
a heating element including a sheet heating element including a plurality of electrically conductive fibers
Data Source
AI summary
A vaporizing assembly for an aerosol generating system includes a sheet heating element and a delivery device configured to deliver a liquid aerosol-forming substrate from a liquid storing portion to the sheet heating element. The sheet heating element is spaced apart from the delivery device and is configured to heat the delivered liquid aerosol forming substrate.