Enclosure Vent Assembly With Tortuous Airflow and Contaminant Blocking
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Solution Overview
Problem
Existing vent assemblies fail to effectively equalize pressure while preventing the ingress of contaminants such as particles and liquids into enclosures, particularly those housing electronic components and battery cells.
Innovation Solution
A vent assembly with a vent body featuring a coupling structure, outlet and inlet relief valves, and a passive airflow vent, along with a rupture valve, is designed to equalize pressure and prevent contamination by incorporating a cover that surrounds the passive airflow vent laterally and axially, and a breathable membrane to obstruct liquid water flow, while allowing selective airflow pathways.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a passive airflow vent is exposed to the environment, then airflow efficiency is improved, but contaminant ingress increases
Solution Approach 1:
A cover structure is introduced as an intermediary element between the passive airflow vent and the external environment. This cover creates a tortuous flow path that allows air to pass through while blocking direct access for contaminants such as particles and liquids, thus resolving the contradiction between maintaining airflow efficiency and preventing contaminant ingress
Solution Approach 2:
The cover structure adds a spatial dimension to the airflow path by creating a tortuous route through lateral and axial extensions. This multi-dimensional approach allows air to reach the vent through a longer, more complex path that naturally filters out contaminants while maintaining ventilation functionality
2Reliability
If relief valves are added to equalize pressure, then pressure equalization is improved, but device complexity increases
Solution Approach 1:
Multiple relief valves (inlet relief valve and outlet relief valve) are merged into a single vent assembly housing, operating in parallel to handle pressure equalization in both directions. This integration allows the system to maintain reliability for pressure equalization while consolidating components to manage complexity
3Object-affected harmful factors
If a cover with tortuous path is introduced, then contaminant protection is improved, but airflow resistance increases
Solution Approach 1:
The cover structure provides localized protection specifically at the vent opening area where contaminants would enter, while the tortuous path geometry is designed to minimize overall airflow resistance. The lateral and axial extensions create a barrier against contaminants without completely blocking the airflow path, thus balancing protection and airflow efficiency
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 vent assembly effectively equalizes pressure and prevents contamination, ensuring reliable operation and protection of enclosed systems by minimizing the ingress of contaminants and maintaining airflow efficiency.
Implementation Method 1
The passive airflow vent includes a breathable membrane that is configured to obstruct liquid water flow therethrough
Implementation Method 2
the outlet relief valve selectively defines an outlet airflow pathway upon a first pressure differential between the first axial end and the second axial end
Data Source
AI summary
The present disclosure is generally related to vent assemblies. More particularly, the present disclosure is related to vent assemblies that are configured for pressure equalization of an enclosure.