Capillary Buffer Design for E-Cigarette Leakage Prevention
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Solution Overview
Problem
Electronic smoking devices experience e-liquid leakage due to gas pressure buildup in non-ventilated cartridges, causing e-liquid to be pushed out and lost.
Innovation Solution
A capillary buffer system is implemented between the liquid supply and the atomizer, featuring a liquid conduit and buffer spaces with an air channel connecting to a vent, which absorbs excess liquid and manages pressure fluctuations to prevent leakage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stress or pressure
If the container is vented to release gas pressure, then gas pressure buildup is reduced, but e-liquid is pushed out of the cartridge resulting in leakage
Solution Approach 1:
The patent introduces an intermediary buffer space between the liquid supply and the atomizer. This buffer space acts as a mediator that receives excess e-liquid pushed out by gas pressure, preventing it from leaking outside the cartridge while still allowing pressure relief. The buffer space is connected to the liquid supply through a capillary conduit and to the external environment through a vent, thus mediating between pressure release and liquid containment.
Solution Approach 2:
The buffer space is designed beforehand as a cushioning zone that anticipates and absorbs the harmful effect of gas pressure buildup. By providing this pre-prepared space, the system prevents e-liquid from being forced out of the cartridge during normal operation or when gas pressure increases, effectively cushioning against the harmful pressure effects before they cause leakage.
2Loss of substance
If the container is pressure-tight to prevent e-liquid leakage, then e-liquid leakage is prevented, but gas pressure buildup increases causing potential leakage
Solution Approach 1:
The buffer space serves as an intermediary that allows controlled pressure management. It is connected to the liquid supply through a capillary conduit that maintains pressure tightness for normal operation, while also being connected to a vent that provides a controlled pressure release path. This intermediary structure enables the system to maintain pressure tightness to prevent leakage while providing a mechanism to manage gas pressure buildup.
Solution Approach 2:
The system changes the pressure parameters dynamically through the buffer space and vent mechanism. When gas pressure builds up, the system allows controlled pressure release through the vent, changing the pressure parameter from high to low. This parameter change is managed through the intermediary buffer space, which prevents e-liquid leakage during normal operation while enabling pressure management when needed.
3Quantity of substance
If porous material is used to hold e-liquid in the cartridge, then e-liquid storage is improved, but gas pressure may push e-liquid out resulting in leakage
Solution Approach 1:
The buffer space acts as an intermediary between the porous material storage zone and the atomizer. It receives excess e-liquid that may be pushed out by gas pressure through the porous material, preventing it from leaking outside the cartridge. The capillary conduit connects the buffer space to the liquid supply, ensuring that e-liquid is properly channeled to the atomizer while the vent provides pressure relief, thus mediating between storage capacity and leakage prevention.
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 capillary buffer effectively reduces e-liquid leakage by accommodating pressure changes and ensuring consistent liquid flow to the atomizer, maintaining optimal performance and user experience.
Implementation Method 1
a capillary buffer between a liquid supply and an atomizer in the housing of the device
Data Source
AI summary
An electronic smoking device, comprising a capillary buffer having a first end, a second end, a capillary buffer portion between the first end and a second end, and an vapor channel and a liquid conduit formed between first end and the second end and through the capillary buffer portion; the capillary buffer portion is operable to receive under capillary effect excessive liquid from the liquid supply.