Double-Sided Display Heat Exchanger With Partitioned Bi-Directional Airflow
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Solution Overview
Problem
Existing digital out of home (DOOH) advertising displays face challenges in thermal management due to harsh environmental conditions, requiring efficient thermal management systems that accommodate varying components and airflow patterns while maintaining a compact footprint.
Innovation Solution
A double-sided display assembly with bi-directional flow through a common, partitioned heat exchanger, utilizing closed and open loop airflow pathways, where circulating gas flows in opposing directions through separate channels to enhance thermal management and reduce heat generation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a common heat exchanger is used for both side assemblies, then device complexity is reduced, but thermal management effectiveness may worsen due to conflicting airflow requirements
Solution Approach 1:
The common heat exchanger is partitioned into separate sections using septa, creating distinct thermal zones for each side assembly while maintaining a single unified heat exchanger structure. This segmentation allows independent thermal management for each side while sharing the common heat exchanger infrastructure.
Solution Approach 2:
Two separate heat exchanger systems are merged into a single common heat exchanger that serves both side assemblies. The heat exchanger is configured to receive circulating gas from both sides and dissipate heat from both sources simultaneously, reducing overall device complexity while maintaining thermal management effectiveness through the segmentation principle.
2Reliability
If circulating gas flows through closed loop channels, then thermal management effectiveness is improved, but device complexity increases due to additional channels and septa
Solution Approach 1:
The closed loop channels and septa serve multiple functions: they guide circulating gas flow, partition thermal zones within the common heat exchanger, and provide structural support. The same components that enable effective thermal management also contribute to the overall structural integrity of the display assembly.
Solution Approach 2:
The closed loop channels are integrated within the existing structural framework of the display assembly, nesting the thermal management pathways within the available space between components rather than adding external structures. The septa are positioned to simultaneously serve as flow dividers and structural elements.
3Reliability
If the display unit is sealed to protect electronics, then reliability is improved, but thermal management becomes more difficult
Solution Approach 1:
A circulating gas is introduced as an intermediary medium between the sealed electronics and the external environment. The gas absorbs heat from the electronics and components within the sealed unit and transports it to the common heat exchanger, where heat is dissipated to the external environment through the heat exchanger surfaces.
Solution Approach 2:
The thermal management system uses pneumatic principles by circulating gas through closed loop channels to transfer heat. The gas flow is driven by pressure differentials created by fans, creating a forced convection system that efficiently removes heat from the sealed unit without requiring physical openings in the seal.
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 manages thermal loads, reduces heat generation, and maintains a compact design suitable for diverse environmental conditions, eliminating the need for pass-through devices and simplifying manufacturing and maintenance.
Implementation Method 1
a common heat exchanger
Implementation Method 2
circulating gas flows in opposing directions through separate channels
Implementation Method 3
fan(s) drive circulating gas through a closed loop airflow pathway
Data Source
AI summary
Display assemblies with bi-directional flow through a common, partition heat exchanger are provided. Side assemblies are connected to a structural framework and include a cover, an electronic display, and one or more channels. A heat exchanger is positioned between the side assemblies and within the structural framework. A closed loop airflow pathway includes a first portion including at least one of the channels of the first side assembly, a second portion including a first portion of the heat exchanger, distal from the first side assembly, a third portion including at least one of the channels of the second side assembly, and a fourth portion extending to the first portion and including a second portion of the heat exchanger, distal from the second side assembly.