Vapor Device Liquid Capture Element Leakage
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Solution Overview
Problem
Aerosol or vapor provision devices, such as e-cigarettes, are prone to liquid leakage due to pressure differentials, leading to loss of consumable liquid and potential device damage, as the existing liquid conduit and heating element arrangement is sensitive to pressure changes, causing excess liquid to leak into the device interior.
Innovation Solution
Incorporating a liquid capture element with an absorbent structure providing a lower capillary force than the liquid conduit, positioned between the reservoir and the vapor generator, to capture and store excess liquid, preventing leakage and allowing for later consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If a liquid conduit is used to deliver source liquid from the reservoir to the vapor generator, then liquid delivery is achieved, but liquid leakage occurs due to pressure differentials
Solution Approach 1:
The liquid capture element serves as an intermediary component between the liquid conduit and the vapor generator. It intercepts excess liquid that escapes from the liquid conduit due to pressure differentials, preventing this liquid from leaking into the device interior. The capture element acts as a buffer that mediates between the pressure-driven liquid flow and the vaporization process, thereby resolving the contradiction between maintaining liquid delivery and preventing leakage.
Solution Approach 2:
The liquid capture element is constructed from an absorbent porous material that can selectively uptake excess liquid through capillary action. The porous structure provides a lower capillary force than the liquid conduit, allowing it to capture over-pressurized liquid without competing with the conduit for liquid transport. This porous material approach enables the system to tolerate pressure differentials while preventing leakage.
2Productivity
If the reservoir is designed to deliver source liquid at an appropriate rate, then vaporization efficiency is improved, but sensitivity to pressure differentials increases causing liquid loss
Solution Approach 1:
The liquid capture element provides beforehand cushioning by being positioned to intercept excess liquid before it can be lost. It acts as a safety buffer that compensates for pressure differential effects, allowing the reservoir to maintain efficient liquid delivery rates for vaporization while the capture element prevents liquid loss during pressure fluctuations. This prior cushioning approach resolves the contradiction between productivity and substance loss.
3Reliability
If a liquid capture element with lower capillary force is introduced, then liquid leakage is reduced, but device complexity increases
Solution Approach 1:
The liquid capture element extracts the leakage prevention function from the main liquid delivery path. By placing a dedicated capture element with lower capillary force in contact with the liquid conduit, the system separates the liquid delivery function (performed by the conduit) from the leakage prevention function (performed by the capture element). This extraction approach adds a component but provides a simple, effective solution to the leakage problem without complicating the overall device architecture.
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 liquid capture element effectively reduces liquid loss and internal leakage, maintaining device integrity and allowing unused liquid to be vaporized when the reservoir is empty, enhancing user convenience by minimizing waste and external leaks.
Implementation Method 1
a liquid capture element in liquid transfer contact with at least a portion of the liquid conduit between the vapor generator and a part of the liquid conduit that receives liquid from the reservoir, and comprising an absorbent structure providing a lower capillary force than a capillary force of the liquid conduit
Implementation Method 2
comprising an absorbent structure providing a lower capillary force than a capillary force of the liquid conduit
Implementation Method 3
a vapor generator for vaporizing source liquid
Data Source
AI summary
An assembly for a vapor provision device includes a reservoir for storing source liquid; a liquid conduit for delivering the source liquid from the reservoir to a vapor generator for vaporizing the source liquid; and a liquid capture element in liquid transfer contact with at least a portion of the liquid conduit between the vapor generator and a part of the liquid conduit that receives liquid from the reservoir, and including an absorbent structure providing a higher capillary force than a capillary force of the reservoir.