Perimeter Ventilation System for Electronic Displays
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Solution Overview
Problem
Electronic displays used in outdoor or high-temperature environments face cooling challenges due to dust and contamination issues when ambient air is ingested, leading to premature failures.
Innovation Solution
An electronic display assembly with a free-standing housing and a cooling system that includes a buffer zone to separate intake and exhaust airflows, using a cross-flow heat exchanger and separate air loops to prevent dust entry and enhance cooling efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If ambient air is ingested into the display for cooling, then cooling efficiency is improved, but dust and contaminants enter the display causing premature failures
Solution Approach 1:
The housing is segmented into multiple air loops (first air loop and second air loop) with separate intake and exhaust paths. The first air loop provides cooling air to the display while the second air loop exhausts heated air, preventing contaminated air from re-entering the display and reducing dust accumulation.
Solution Approach 2:
A buffer zone is introduced as an intermediary space between the display and the external environment. This buffer zone separates the clean cooling air path from the contaminated exhaust path, allowing effective cooling while preventing dust and contaminants from directly contacting the display.
2Device complexity
If air cooling is implemented without separation of airflows, then device complexity is reduced, but dust contamination occurs leading to premature failures
Solution Approach 1:
The cooling system is segmented into distinct air loops with separate intake and exhaust pathways. This segmentation creates independent flow paths that prevent cross-contamination while maintaining a manageable system architecture through modular housing design.
Solution Approach 2:
The airflows are separated in the vertical dimension with the buffer zone creating distinct upper and lower regions. Intake air enters through lower portions while exhaust air is removed through upper portions, utilizing vertical space to achieve flow separation without significantly increasing horizontal complexity.
3Ease of manufacture
If simple air intake cooling is used, then manufacturing cost is reduced, but dust entry causes premature failures requiring increased maintenance
Solution Approach 1:
The housing is divided into segmented sections with dedicated intake and exhaust portions, allowing for modular manufacturing and assembly. This segmentation enables straightforward fabrication of each section while creating an effective barrier against dust entry that extends display lifespan.
Solution Approach 2:
The buffer zone serves as an intermediary chamber that is relatively simple to manufacture but effectively prevents dust-laden air from directly contacting the display. This low-complexity structural addition significantly extends display lifespan by eliminating the primary failure mechanism.
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 system effectively cools electronic displays by preventing dust and contamination while maintaining airflow, thereby extending the display's lifespan and ensuring reliable operation in harsh environments.
Implementation Method 1
a cooling system that includes a buffer zone to separate intake and exhaust airflows, using a cross-flow heat exchanger
Implementation Method 2
separate air loops to prevent dust entry and enhance cooling efficiency
Data Source
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AI summary
The exemplary embodiments herein provide an electronic display assembly having an electronic display surrounded by a front panel and a housing. An ingestion gap may be placed near a portion of the perimeter of the front panel while an exhaustion gap may be placed near an opposing portion of the perimeter of the front panel. A buffer zone may be defined between the ingestion gap and the exhaustion gap. A fan may be positioned to draw open loop fluid into the ingestion gap, through a channel behind the electronic display, and out of the exhaustion gap. This fan may also draw open loop fluid through an optional heat exchanger. A circulating fan may force circulating air through an optional heat exchanger.