Electronic Display Cooling System with Integrated Heat Exchanger
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Solution Overview
Problem
Electronic displays face challenges in cooling, particularly in outdoor environments with extreme temperatures and high brightness, leading to heat generation and noise issues from previous cooling systems, which fail to evenly distribute cooling across the display.
Innovation Solution
A cooling system using a combination of circulating gas and ambient gas, with a cross-flow heat exchanger to transfer heat without mixing, and additional ambient gas flow across the rear surface to cool the backlight, while minimizing noise through fan placement within the heat exchanger or manifold, ensuring even cooling and preventing contamination.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If gas is circulated through the display to cool internal components, then cooling effectiveness is improved, but noise emissions increase
Solution Approach 1:
A heat exchanger is introduced as an intermediary component between the circulating gas cooling path and the ambient environment. The heat exchanger transfers heat from the circulating gas to ambient air without allowing the gas to mix with contaminants, while the fan is positioned within the heat exchanger housing to reduce noise propagation. This mediator approach resolves the contradiction by enabling effective cooling while isolating the noise source and preventing contamination.
2Temperature
If ambient gas is drawn through the display for cooling, then cooling capability is improved, but contamination of internal components increases
Solution Approach 1:
The heat exchanger serves as a barrier that allows thermal energy transfer from ambient gas to the circulating cooling gas while preventing direct contact between ambient contaminants and the clean circulating gas. This intermediary structure enables the system to benefit from ambient cooling without introducing contaminants into the display interior.
Solution Approach 2:
The system uses controlled gas flow dynamics where ambient air is drawn through the heat exchanger and transferred to the circulating cooling gas. The pneumatic design allows for regulated airflow that maintains positive pressure inside the display, preventing contaminants from entering while enabling effective heat transfer from the ambient environment.
3Ease of operation
If fans are positioned outside the heat exchanger to drive gas flow, then ease of operation is improved, but noise emissions increase
Solution Approach 1:
The fan is nested within the housing of the heat exchanger, with the fan housing forming an integrated part of the heat exchanger assembly. This nesting arrangement places the noise-generating fan inside the existing heat exchanger structure, using the heat exchanger housing as a noise barrier while maintaining compact integration. The fan remains accessible for maintenance through the integrated design.
4Device complexity
If single-point cooling is used to simplify the cooling system, then device complexity is reduced, but thermal uniformity across the display deteriorates
Solution Approach 1:
The cooling system is segmented into multiple independent channels that distribute cooled gas to different regions of the display. Each channel can be independently optimized for its specific cooling zone, allowing for uniform temperature distribution across the entire display surface. This segmentation approach maintains relative system simplicity while achieving thermal uniformity through distributed cooling points.
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 maintaining a consistent temperature across the display, reducing noise emissions, and preventing contamination of sensitive components, suitable for large and high-brightness displays in various environments.
Implementation Method 1
The circulating gas and the ambient gas are drawn through a heat exchanger which will allow the heat to transfer from the circulating gas to the ambient gas
Implementation Method 2
Circulating gas may be used to remove heat from the front of the image assembly
Implementation Method 3
an additional flow of ambient gas can be drawn across the rear surface of the image assembly to remove heat from the rear portion of the image assembly
Data Source
AI summary
A heat exchanger assembly for an electronic image assembly placed within a housing where ambient air surrounds the exterior of the housing and a rear plate may be placed behind a backlight to create a channel. An ambient air fan may be placed between two portions of a heat exchanger to force ambient air through the heat exchanger. The fan may also be positioned to also force ambient air through the channel. A circulating gas fan may also be placed within the housing to force circulating gas through at least one portion of the heat exchanger.