Vent Seal With Flexible Balloon Barrier for Pressure Equalization
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Solution Overview
Problem
Existing vent designs for sealed electronic enclosures allow harmful gases and particulates to enter, leading to potential damage and blockage, while failing to equalize pressure effectively.
Innovation Solution
A vent seal with a flexible barrier and air router that prevents gas entry and particulate collection, using a balloon portion that expands or collapses to equalize pressure without allowing harmful gases in, and routes air in a circuitous manner to inhibit particulate accumulation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stress or pressure
If a vent is provided to equalize pressure between the interior and exterior of the enclosure, then pressure equalization is achieved, but harmful gases and particulates can enter the enclosure
Solution Approach 1:
The patent employs a flexible diaphragm membrane that can expand and contract to equalize pressure differential across the enclosure. The membrane acts as a selective barrier that responds to pressure changes while blocking harmful gases and particulates from entering the interior space, thus resolving the contradiction between pressure equalization and contamination prevention.
Solution Approach 2:
The vent seal assembly serves as an intermediary component between the interior and exterior environments. It mediates the pressure equalization process through the flexible membrane while simultaneously filtering out harmful substances, allowing pressure balance without direct exposure of the interior to contaminants.
2Stress or pressure
If a vent opening is provided for pressure equalization, then pressure differential is reduced, but particulates can block the vent
Solution Approach 1:
The flexible diaphragm membrane replaces traditional open vent structures. Its elastic properties allow it to deform in response to pressure differential, enabling pressure equalization without creating a fixed opening that could be blocked by particulates. The membrane's flexibility ensures continuous functionality even under varying pressure conditions.
Solution Approach 2:
The vent seal assembly transitions from a static vent structure to a dynamic system where the membrane continuously adapts its shape and position based on pressure conditions. This dynamic response allows the system to maintain pressure equalization capability while preventing particulate accumulation that would occur with static vent openings.
3Object-affected harmful factors
If a barrier is mounted in the housing to prevent gas entry, then harmful gas ingress is reduced, but pressure equalization becomes ineffective
Solution Approach 1:
The patent uses a flexible diaphragm membrane that combines the barrier function of sealing against harmful gases with the pressure-responsive function of enabling pressure equalization. Unlike rigid barriers, the membrane can deform to allow pressure balance while maintaining its integrity as a protective seal.
Solution Approach 2:
The membrane's physical state changes in response to pressure differential parameters. Under high pressure differential, the membrane maintains its barrier function; as pressure equalizes, the membrane deforms to facilitate further pressure balance. This parameter-driven behavior allows simultaneous achievement of gas prevention and pressure equalization.
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
Effectively equalizes pressure while preventing harmful gas ingress and particulate blockage, ensuring the safety and functionality of electronic components in harsh environments.
Implementation Method 1
The barrier is capable of expanding or collapsing depending upon the differential in air pressure between the interior of the enclosure and the outside environment
Data Source
AI summary
Disclosed herein is a novel design of a vent seal for a sealed electronics component enclosure. The vent seal comprises a rubber element defining balloon portion which extends through an opening in the wall of the enclosure. The balloon portion expands into the interior of the enclosure when the air pressure outside of the enclosure rises and collapses when the pressure outside of the enclosure falls. The vent seal is also provided with an air router that allows the easy passage of air into the interior of the balloon portion, while inhibiting particulates from entering the interior of the balloon portion to prevent interference with the functioning of the vent seal.