Capillary Tube Heater Assembly for Orientation-Independent Liquid Supply
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Solution Overview
Problem
Conventional heater assemblies in electronic aerosol provision systems, such as electronic cigarettes, often fail to provide efficient liquid supply to the heater element, particularly when the device is held at different orientations.
Innovation Solution
A heater assembly with a substrate featuring capillary tubes of varying dimensions and a liquid aerosol-generating material storage region between substrate portions, ensuring consistent liquid supply to the heater layer.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional heater assemblies are used with uniform capillary tubes, then the structure is simple, but liquid supply efficiency deteriorates when the device is held at different orientations
Solution Approach 1:
The substrate is divided into a first portion and a second portion with different capillary tube configurations. The first portion has capillary tubes optimized for liquid uptake from the reservoir, while the second portion has capillary tubes optimized for delivering liquid to the heater element. This local differentiation ensures reliable liquid supply efficiency across various device orientations without requiring a completely complex redesign of the entire substrate.
2Reliability
If capillary tubes have varying dimensions in different substrate portions, then liquid supply efficiency improves, but manufacturing complexity increases
Solution Approach 1:
The substrate is segmented into distinct functional portions: a first portion with capillary tubes of first dimensions for liquid uptake, and a second portion with capillary tubes of second dimensions for liquid delivery. This segmentation allows each portion to be optimized independently for its specific function while maintaining overall manufacturability through modular fabrication approaches.
3Adaptability or versatility
If a liquid storage region is added between substrate portions, then aerosol generation performance is maintained regardless of orientation, but device complexity increases
Solution Approach 1:
A liquid aerosol-generating material storage region is incorporated between the first and second portions of the substrate. This storage region acts as a preliminary reservoir that ensures liquid is available for the capillary tubes in the second portion regardless of device orientation, thereby maintaining aerosol generation performance without requiring complex external reservoirs or orientation-dependent mechanisms.
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
Ensures efficient liquid delivery to the heater element, maintaining aerosol generation performance regardless of device orientation.
Implementation Method 1
one or more capillary tubes extending from another surface of the substrate through the heater layer provided on the first surface of the substrate
Implementation Method 2
a heater layer configured to generate heat when supplied with energy
Implementation Method 3
electrical power is supplied to the heating element to vaporize source liquid in the vicinity of the heating element to generate an aerosol for inhalation by the user
Data Source
AI summary
A heater assembly for an aerosol provision system, the heater assembly including a substrate; a heater layer configured to generate heat when supplied with energy, the heater layer provided on a first surface of the substrate; and one or more capillary tubes extending from another surface of the substrate through the heater layer provided on the first surface of the substrate. The substrate includes a first portion and a second portion, the first portion including the first surface of the substrate, wherein at least one dimension of the one or more capillary tubes in the first portion of the substrate is different to a corresponding dimension of the one or more capillary tubes in the second portion of the substrate, and wherein the substrate additionally includes a liquid aerosol-generating material storage region located between the first portion and the second portion of the substrate. Also described is a cartomizer including the heater assembly, an aerosol provision system including the heater assembly, and a method for manufacturing the heater assembly.