Electronic Enclosure Filtration With Separate Air and Liquid Pathways
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Solution Overview
Problem
Enclosures for electrical units face issues with openings or vents getting blocked by liquid and/or dust, leading to airflow obstruction and pressure buildup, which can cause electronic units to malfunction.
Innovation Solution
A filtering apparatus comprising a base and a cover with spacers and ribs that create separate pathways for liquid and air, directing liquid away from the electronic unit while allowing air to flow through, using a membrane filter to prevent solid particles and liquid ingress.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If openings or vents are provided in the enclosure to allow air flow, then cooling efficiency is improved, but the risk of liquid and dust blockage increases
Solution Approach 1:
The opening is segmented into multiple pathways: an air pathway with an air vent and a liquid pathway with a groove. This segmentation allows air to flow through the vent while liquid is directed away through the groove, preventing blockage and maintaining cooling efficiency.
Solution Approach 2:
A cover is introduced as an intermediary component that covers the air vent while allowing air passage. The cover includes a groove that intercepts liquid before it can block the air vent, acting as a mediator that protects the vent from liquid blockage while maintaining airflow.
2Reliability
If the opening is covered to prevent liquid ingress, then reliability is improved, but airflow capability deteriorates
Solution Approach 1:
The cover is designed with different properties in different regions: it is solid to prevent liquid ingress in most areas, but includes a groove that provides liquid passage capability. This local differentiation allows the cover to simultaneously protect against liquid while maintaining airflow through the air vent.
Solution Approach 2:
The cover's opening is segmented into an air pathway and a liquid pathway. The air vent allows airflow while the groove handles liquid drainage, enabling the cover to provide both protection and airflow functionality simultaneously.
3Device complexity
If a simple opening is used without complex structures, then device complexity is reduced, but liquid and dust filtration capability is insufficient
Solution Approach 1:
The opening structure is segmented into simple geometric features: a groove with specific dimensions and an air vent. This segmentation provides effective liquid and dust filtration through the groove geometry without requiring complex mechanical components, maintaining simplicity while improving protection.
Solution Approach 2:
The groove structure converts the potential harm of liquid ingress into a beneficial liquid drainage pathway. The groove's geometry is designed to intercept and direct liquid away from the air vent, transforming what would be a blocking hazard into a protective drainage feature.
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
Prevents blockage of vents by effectively directing liquid and solid particles away from the electronic unit, maintaining airflow and preventing pressure buildup, thus ensuring the unit's functionality.
Implementation Method 1
using a membrane filter to prevent solid particles and liquid ingress
Implementation Method 2
A filtering apparatus comprising a base and a cover with spacers and ribs that create separate pathways for liquid and air, directing liquid away from the electronic unit while allowing air to flow through
Data Source
AI summary
An apparatus for attaching to an electronic unit includes a base and a cover. The base includes a bottom wall defining an opening, a first sidewall extending from a perimeter of the bottom wall, a support wall, and a second sidewall. The first sidewall and the second sidewall extend from respective ends of the support wall such that a groove is defined between the first sidewall, the support wall, and the second sidewall. The cover is configured to be coupled to the base and includes a top wall including a first side and a second side, a third sidewall extending from a perimeter of the second side of the top wall, and at least one spacer extending from the second side of the top wall and configured to define a cavity between the base and the cover.