Electronic Display Cooling with Dual-Loop Heat Exchange
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Solution Overview
Problem
Existing cooling systems for electronic displays are inadequate for outdoor environments with high ambient temperatures and direct sunlight, as they primarily rely on convective heat dissipation and are not effective in managing radiative heat transfer. Additionally, these systems can ingest contaminants from the ambient air, potentially damaging internal components.
Innovation Solution
The proposed cooling system employs two separate gas flow paths: a closed loop that circulates gas across the front and rear surfaces of the display, and an open loop that ingests ambient gas for heat exchange. A cross-flow heat exchanger is used to transfer heat from the circulating gas to the ambient gas, preventing contamination and improving cooling efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If convective heat dissipation systems are used to cool electronic displays, then cooling capability is improved, but the system cannot effectively manage radiative heat transfer from sunlight
Solution Approach 1:
The cooling system is divided into two independent loops: a closed loop for internal heat management and an open loop for external heat exchange. This segmentation allows each loop to be optimized for its specific function, with the closed loop handling internal component cooling and the open loop managing radiative heat from sunlight, thereby resolving the contradiction between convective cooling capability and outdoor adaptability.
Solution Approach 2:
A heat exchanger is introduced as an intermediary component between the closed loop and open loop. The heat exchanger enables thermal energy transfer from the closed loop to the open loop without direct fluid mixing, allowing efficient heat dissipation while maintaining system adaptability to outdoor conditions.
2Temperature
If fans are used to move ambient air through the display for cooling, then heat transfer efficiency is improved, but contaminants from ambient air can damage internal components
Solution Approach 1:
The system separates the cooling function into two distinct loops: the closed loop handles internal heat transfer without exposing components to contaminants, while the open loop manages external heat exchange. This segmentation eliminates the risk of contaminant damage while maintaining heat transfer efficiency.
Solution Approach 2:
The heat exchanger serves as an intermediary that enables thermal energy transfer between the closed loop (clean internal environment) and open loop (external environment with contaminants). This allows efficient heat dissipation while preventing contaminants from contacting internal components.
3Area of stationary object
If larger screen sizes are implemented, then display capability is improved, but heat generation and heat transmission into the display increase
Solution Approach 1:
The dual-loop cooling system segments heat management functions, allowing the closed loop to handle internal heat from larger displays while the open loop manages external radiative heat. This segmentation enables effective cooling of larger screen sizes without being overwhelmed by increased heat generation or transmission.
Solution Approach 2:
The heat exchanger acts as an intermediary that scales with display size, providing proportional heat dissipation capability. As display area increases and heat generation increases, the heat exchanger mediates the thermal energy transfer between loops, maintaining effective cooling regardless of display size.
4Object-affected harmful factors
If a closed loop cooling system is used, then contaminant protection is improved, but heat dissipation efficiency may be reduced
Solution Approach 1:
The system segments cooling into two loops: the closed loop protects internal components from contaminants while the open loop handles external heat exchange. This segmentation allows the closed loop to maintain contaminant protection while the open loop ensures adequate heat dissipation efficiency through direct external cooling.
Solution Approach 2:
The heat exchanger serves as an intermediary that enables thermal energy transfer from the closed loop to the open loop, maintaining heat dissipation efficiency while preserving contaminant protection. The intermediary allows the closed loop to remain sealed against contaminants while still achieving effective cooling through the open loop.
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
This dual-loop cooling system effectively manages heat dissipation in high-temperature environments, including outdoor conditions with direct sunlight, while preventing contamination of internal components. It provides improved thermal management for electronic displays, ensuring both performance and longevity.
Implementation Method 1
A heat exchanger may be used to transfer heat from the circulating gas to the ambient gas
Implementation Method 2
The circulating gas is then preferably directed (or forced) into the heat exchanger in order to transfer heat from the circulating gas to the ambient gas
Implementation Method 3
heat transfer from the circulating gas to the ambient gas
Data Source
AI summary
Electronic display assemblies are disclosed which include a housing having an intake and an exhaust, an electronic display located within the housing, a first airflow pathway fluidly connected to an ambient environment and extending through the housing between the intake and the exhaust, a first portion of which extends proximate to a rear surface of the electronic display and a second portion of which extends rearward of, and is spaced apart from, the rear surface of the electronic display. A second airflow pathway is separated from the first airflow pathway and forms a closed, continuous pathway within the housing. At least a portion of the second airflow pathway is located rearward of the electronic display. One or more electronic assemblies for operating the electronic display assembly are located within the portion of the second airflow pathway located rearward of the electronic display.