Downward-Facing Cooling Inlet for Debris-Resistant Thermal Management
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Solution Overview
Problem
Electronic assemblies in harsh environments face challenges in thermal management due to high power density and ambient temperatures, with existing cooling methods like forced air cooling allowing sand, dust, and water to enter the enclosures.
Innovation Solution
The design incorporates downward-facing cooling airflow inlets and outlets with side-mounted ducts and fans, preventing debris entry and providing a drainage path, eliminating the need for additional protection like filters, thus enhancing cooling performance and reducing weight and cost.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If forced cooling air is used to manage thermal energy, then cooling performance is improved, but sand, dust, and water enter the electronic assembly
Solution Approach 1:
The cooling airflow inlet is inverted to face downward instead of upward, causing cooling air to enter from below and flow upward through the enclosure. This inversion prevents sand, dust, and water from entering while maintaining effective cooling, as debris naturally settles downward due to gravity
2Object-affected harmful factors
If additional protective measures like filters are added to prevent debris entry, then debris protection is improved, but device complexity and weight increase
Solution Approach 1:
The patent extracts and eliminates the need for filters and other protective measures by using the downward-facing inlet design. The gravity-driven debris separation naturally prevents debris entry, allowing the system to achieve protection without adding complex protective components
Solution Approach 2:
The cooling inlet design itself provides the protective function by utilizing gravity to separate debris from the cooling airflow. The system serves its own protection needs through the directional airflow design, eliminating the need for separate protective mechanisms
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 configuration effectively manages thermal energy while preventing debris entry, improving cooling efficiency and reducing the need for additional protective measures, thereby enhancing the reliability and performance of electronic assemblies in harsh conditions.
Implementation Method 1
The cooling airflow inlet is downward facing toward the vertically bottom surface such that the cooling airflow flows into the cooling airflow inlet an upward direction toward the vertically top surface
Data Source
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AI summary
An electronic assembly (110) includes one or more electronic components and an enclosure (112) in which the one or more electronic components are located. The enclosure includes a vertically top surface (116), a vertically bottom surface (118), and a plurality of side portions (120) extending between the top surface and the bottom surface. A cooling arrangement for thermal management of the one or more electronic components includes a cooling airflow inlet (126) to admit a cooling airflow (122) into the enclosure, a cooling airflow outlet (128) to exhaust the cooling airflow from the enclosure, and one or more cooling pathways between the cooling airflow inlet and the cooling airflow outlet. The cooling airflow inlet is downward facing toward the vertically bottom surface such that the cooling airflow flows into the cooling airflow inlet an upward direction toward the vertically top surface.