Mouthpiece Valve Coatings to Redirect Condensate in Aerosol Devices
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Solution Overview
Problem
Existing aerosol-generating devices face issues with liquid leaking, as e-liquid is not fully vaporized and condenses into large droplets, leading to reduced aerosol quality and increased leakage.
Innovation Solution
The aerosol-generating device incorporates a valve with hydrophobic and hydrophilic coatings to prevent the passage of large droplets, utilizing a one-way valve and a storage tank to collect repelled liquid, along with a director to redirect condensed liquid back to the heater, minimizing leakage and enhancing aerosol quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the heater heats the e-liquid to generate aerosol, then aerosol production is improved, but liquid leakage increases due to condensation forming large droplets
Solution Approach 1:
The patent converts the harmful condensation droplets into a beneficial system by introducing a hydrophobic coating on the valve surface. The condensation that would normally leak is now repelled by the hydrophobic coating and redirected back to the heater for re-vaporization, transforming the leakage problem into an efficiency improvement opportunity
Solution Approach 2:
The patent changes the surface property parameter of the valve by applying a hydrophobic coating. This parameter change causes the valve surface to repel liquid droplets while allowing vapor passage, thereby preventing leakage without affecting aerosol generation
2Ease of operation
If the device allows free flow of aerosol-forming substrate, then aerosol delivery is improved, but liquid leakage increases
Solution Approach 1:
The patent applies local quality by treating only the valve surface with a hydrophobic coating while leaving other parts of the system unchanged. This localized modification creates a selective barrier that repels liquid droplets at the valve location while maintaining normal aerosol flow elsewhere in the system
3Object-generated harmful factors
If the valve prevents liquid passage, then liquid leakage is reduced, but aerosol flow may be restricted
Solution Approach 1:
The hydrophobic coating changes the surface energy parameter of the valve, creating a selective barrier that differentiates between liquid and vapor phases. This parameter change allows the valve to repel liquid droplets while maintaining permeability to aerosol vapor, thus preventing leakage without restricting aerosol flow
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 configuration significantly reduces liquid leakage and improves aerosol quality by ensuring that only vaporized aerosol is delivered, while the hydrophobic and hydrophilic coatings effectively manage condensation, maintaining a consistent aerosol output.
Implementation Method 1
The second side of the valve includes a hydrophobic coating
Implementation Method 2
The second side of the valve includes a hydrophilic coating
Implementation Method 3
a heater for heating the e-liquid to generate an aerosol
Implementation Method 4
Liquid that has been vaporized by the heater may condense within the device and form large droplets
Data Source
AI summary
An aerosol-generating device includes a housing having a first end defining a mouthpiece, a second end, and a cavity defined between the first end and the second end. The device also includes a reservoir within the cavity. The reservoir is configured to store a liquid aerosol-forming substrate. The device also includes an atomizer and a valve within the mouthpiece of the housing. The valve has a first side and an second side. The second side of the valve includes a hydrophilic coating, a hydrophobic coating, or both a hydrophilic coating and a hydrophobic coating.