Rigid Bottle Two-Way Vent for Aircraft Pressure Equalization
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Solution Overview
Problem
Standard liquid dispensing systems for hand sanitizer are unsuitable for commercial aircraft due to pressurization and depressurization issues, which can lead to expansion, contraction, and potential explosions or spills caused by flammable liquids during flight.
Innovation Solution
A liquid container with a two-way vent featuring a porous vapor pathway for pressure equalization, preventing liquid loss and ensuring safe dispensing by connecting to a one-way valve, designed to handle aircraft pressure changes without causing flammable spills.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a standard rigid bottle or collapsible bag is used in aircraft, then the liquid dispensing system can be simple and easy to manufacture, but the container will expand and contract during pressurization changes, causing safety hazards
Solution Approach 1:
The patent applies a porous valve mechanism that allows gas to pass through while blocking liquid. The porous structure enables selective permeability based on fluid properties, allowing pressure equalization through gas flow while preventing sanitizer leakage during turbulence or rapid descent.
Solution Approach 2:
The invention extracts the pressure equalization function from the container wall structure and implements it through a dedicated valve component. This separate valve mechanism can be optimized independently for pressure regulation while maintaining the container's structural integrity and simple manufacturing.
2Reliability
If a two-way vent with porous vapor pathway is added for pressure equalization, then the reliability under aircraft pressurization improves, but the device complexity increases
Solution Approach 1:
The patent combines multiple functions into a single integrated valve component: pressure equalization through porous gas flow, liquid prevention through surface tension blocking, and turbulence protection through the one-way valve mechanism. This merging reduces the need for separate components for each function.
Solution Approach 2:
The valve system operates automatically based on pressure differential without requiring external control mechanisms. The porous structure and surface tension properties enable self-regulating flow control, eliminating the need for complex actuators or control systems.
3Reliability
If the two-way vent allows free ventilation, then pressure equalization is effective, but liquid loss occurs during turbulence and rapid descent
Solution Approach 1:
The porous valve structure provides size-selective permeability where the pore dimensions allow gas molecules to pass through while blocking larger liquid molecules. This natural filtration based on pore size achieves both pressure equalization and liquid retention without requiring additional filtering components.
Solution Approach 2:
The porous valve acts as an intermediary medium between the interior and exterior of the container, mediating the flow of gases while preventing liquid passage. This intermediate structure enables controlled interaction between the internal and external environments based on fluid properties.
4Ease of operation
If a one-way valve is used for liquid dispensing, then the dispensing control is simple, but the container cannot handle pressurization changes during aircraft flight
Solution Approach 1:
The valve system is designed to perform multiple functions: liquid dispensing control, pressure equalization, and liquid prevention during turbulence. By integrating these functions into a unified valve mechanism, the system maintains ease of operation while achieving reliability under varying flight conditions.
Solution Approach 2:
The valve system dynamically adapts its flow characteristics based on pressure differential and fluid type. During normal operation, it controls liquid dispensing; during pressure changes, it automatically allows gas flow through the porous pathway; during turbulence, it prevents liquid leakage. This dynamic behavior enables the valve to respond appropriately to different operational conditions.
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 two-way vent system effectively equalizes pressure inside and outside the container, preventing explosions and unwanted liquid discharge during turbulence and rapid descent, ensuring safe operation in aircraft environments.
Implementation Method 1
The two way vent is designed with porous vapor pathway which supports pressure equalization (venting) while simultaneously impeding liquid loss (filtering). The porosity of the two way vent enables pressure equalization between the inside and outside of container
Implementation Method 2
The two way vent is designed with porous vapor pathway which supports pressure equalization (venting) while simultaneously impeding liquid loss (filtering)
Data Source
AI summary
A liquid dispensing system includes a liquid container and a one way user-actuated dispensing valve for dispensing contained liquid. The liquid container further includes a two way vent which allows for ventilation of the contained liquid/gas in response to changes in air pressure outside of the liquid container.