Coated Mouthpiece Valve for Aerosol Leakage Control
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Solution Overview
Problem
Aerosol-generating devices face issues with liquid leaking, as unvaporized e-liquid from the reservoir can condense and form large droplets that escape through the device, affecting the quality and quantity of the aerosol produced.
Innovation Solution
The device incorporates a valve with hydrophobic and hydrophilic coatings within the airflow channel to prevent the passage of large droplets, utilizing a one-way valve mechanism that includes a storage tank for repelled liquid, and a wick system to direct condensed liquid back to the heater, ensuring aerosol quality and minimizing leaks.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a valve is added to prevent liquid leakage, then liquid leakage is reduced, but device complexity increases
Solution Approach 1:
A valve is introduced as an intermediary component in the airflow channel to control and regulate liquid flow. The valve acts as a mediator between the reservoir and the aerosol generation system, opening during inhalation to allow aerosol passage and closing during exhalation to prevent liquid leakage, thus resolving the contradiction between leakage prevention and device complexity.
Solution Approach 2:
The valve is designed to dynamically change its state between open and closed positions based on inhalation and exhalation phases. This dynamic behavior allows the system to adapt to different operational conditions, enabling effective liquid leakage prevention during exhalation while maintaining aerosol delivery during inhalation, without requiring a permanently complex structure.
2Reliability
If hydrophobic coating is applied to the valve, then large droplet passage is prevented, but manufacturing complexity increases
Solution Approach 1:
The surface properties of the valve are modified by applying a hydrophobic coating, which changes the interaction between the valve surface and liquid droplets. This parameter change in surface wettability prevents large droplet passage while allowing vapor and aerosol to pass through, achieving reliable droplet filtration without requiring complex mechanical filtration structures.
Solution Approach 2:
The valve incorporates a hydrophobic coating layer on its surface, creating a composite structure that combines the base valve material with the hydrophobic coating. This composite approach enables the valve to selectively block large droplets while permitting aerosol and vapor passage, achieving sophisticated liquid control through material composition rather than complex geometry.
3Loss of substance
If a storage tank is added to receive repelled liquid, then liquid accumulation is managed, but device complexity increases
Solution Approach 1:
The storage tank serves as a collection point for liquid that is repelled by the hydrophobic coating on the valve. Instead of allowing this liquid to leak or accumulate problematically in the aerosol generation chamber, it is directed to the storage tank for temporary holding or subsequent disposal, effectively managing liquid loss and preventing contamination of the aerosol stream.
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 enhances aerosol quality by preventing large droplet formation and condensation within the device, maintaining consistent aerosol delivery and extending the device's operational efficiency.
Implementation Method 1
The second side of the valve may include a hydrophilic coating, a hydrophobic coating, or both a hydrophilic coating and a hydrophobic coating
Implementation Method 2
The second side of the valve may include a hydrophilic coating, a hydrophobic coating, or both a hydrophilic coating and a hydrophobic coating
Implementation Method 3
a wick system to direct condensed liquid back to the heater
Implementation Method 4
a heater for heating the e-liquid to generate an aerosol
Implementation Method 5
Liquid that has been vaporized by the heater may condense within the device and form large droplets that then leak from the device
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.