Display Heat Exchanger With Dual-Loop Cooling Isolation
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Solution Overview
Problem
Conductive and convective heat transfer systems for electronic displays are inadequate in managing high ambient temperatures and radiative heat from sunlight, especially in outdoor environments, and can be damaged by contaminants in the air, leading to performance and lifespan issues due to inadequate cooling.
Innovation Solution
A dual-flow cooling system with a closed loop and an open loop path, utilizing a cross-flow heat exchanger to transfer heat from circulating gas to ambient gas, preventing contamination and using fan assemblies to direct gas flows across the display's front and rear surfaces, ensuring effective heat dissipation without mixing contaminated ambient air with internal components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single-loop cooling system is used, then the device complexity is reduced, but the cooling effectiveness and reliability are insufficient to handle high ambient temperatures and radiative heat
Solution Approach 1:
The cooling system is divided into two independent loops: a first loop that circulates gas through the display housing for internal cooling, and a second loop that uses ambient air for heat exchange. This segmentation allows each loop to perform specialized cooling functions, improving overall reliability while managing complexity through functional separation.
Solution Approach 2:
A heat exchanger serves as an intermediary component between the two gas paths, enabling thermal energy transfer from the first loop to the second loop without direct gas mixing. This intermediary mechanism enhances cooling effectiveness while maintaining system organization.
2Power
If ambient air is ingested for cooling, then the cooling capacity is improved, but contaminants in the ambient air can damage internal components
Solution Approach 1:
The system segments the gas flow into two separate paths: the first loop circulates clean gas through the display housing, while the second loop uses ambient air that does not enter the display. This segmentation allows the system to benefit from ambient air cooling capacity while preventing contaminants from damaging internal components.
Solution Approach 2:
The heat exchanger acts as an intermediary that transfers thermal energy from the first loop to the second loop without allowing the two gas streams to mix. This enables the system to use ambient air for cooling while maintaining a barrier against contaminants entering the display housing.
3Ease of manufacture
If convective heat dissipation systems are used, then the manufacturing cost is reduced, but the system cannot adequately handle radiative heat from sunlight in outdoor environments
Solution Approach 1:
The heat exchanger serves as an intermediary that enables radiative heat transfer from the display to the ambient air. By facilitating this thermal energy transfer mechanism, the system can handle radiative heat from sunlight in outdoor environments while maintaining a relatively simple overall structure and manufacturing process.
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 dual-flow cooling system effectively manages high ambient temperatures and radiative heat, preventing damage from contaminants and maintaining electronic component performance and lifespan, even in harsh outdoor conditions, by efficiently transferring heat and isolating internal components from ambient air contaminants.
Implementation Method 1
a heat exchanger to transfer heat from the circulating gas to the ambient gas
Implementation Method 2
convective heat transfer systems for electronic displays generally attempt to remove heat from the electronic components in a display through the sidewalls of the display
Data Source
AI summary
A cooling assembly for an electronic image assembly having an open and closed gaseous loop. A closed gaseous loop allows circulating gas to travel across the front surface of an image assembly and through a heat exchanger. An open loop allows ambient gas to pass through the heat exchanger and extract heat from the circulating gas. An optional additional open loop may be used to cool the back portion of the image assembly (optionally a backlight). Ribs may be placed within the optional additional open loop to facilitate the heat transfer to the ambient gas. The cooling assembly can be used with any type of electronic assembly for producing an image.