Multi-Path Ducting for Thin Electronic Device Thermal Management
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Solution Overview
Problem
Traditional thermal management systems for electronic devices face challenges in maintaining effective airflow and cooling efficiency, particularly in thin form factors like laptops, where primary airflow inlets can become occluded, leading to recirculation of heated air and increased noise due to the need for upper surface vents.
Innovation Solution
The implementation of a multi-path ducting and vent system that eliminates upper surface airflow inlets by providing alternative intake paths through secondary inlets, such as side ducts and fan intake ducts, to ensure continuous airflow and reduce noise, while maintaining the device's thickness and ducting design.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If upper surface vents are used to maintain airflow in thin devices, then airflow continuity is improved, but device thickness increases and noise increases
Solution Approach 1:
The patent introduces side ducts that utilize the lateral dimension of the device housing to provide alternative airflow paths. Instead of venting through the upper surface (vertical dimension), the side ducts channel air through the side walls, effectively using a different spatial dimension to resolve the thickness constraint while maintaining airflow continuity.
Solution Approach 2:
The airflow intake system is segmented into multiple independent paths: primary inlets on the upper surface and secondary side ducts on the lateral surfaces. This segmentation allows the system to maintain functional redundancy and airflow continuity even when one path is blocked, while keeping each individual duct compact to minimize overall device thickness.
2Reliability
If upper surface vents are used to maintain airflow, then cooling efficiency is improved, but fan noise increases
Solution Approach 1:
By segmenting the airflow intake into multiple independent paths (upper surface vents and side ducts), the system distributes the airflow demand across several channels. This reduces the velocity requirement and noise generation at any single vent location, while maintaining overall cooling efficiency through the combined effect of all intake paths.
Solution Approach 2:
The side ducts act as intermediary airflow channels that bypass the noisy upper surface vent area. By providing alternative intake paths through the side walls, the system reduces direct airflow interaction with the fan and upper surface components, thereby lowering noise generation while preserving cooling effectiveness.
3Ease of manufacture
If primary airflow inlets are used, then manufacturing simplicity is improved, but airflow restriction occurs when occluded
Solution Approach 1:
The airflow system is divided into primary and secondary intake paths. The primary inlets remain simple and easy to manufacture on the upper surface, while the secondary side ducts provide redundancy. This segmentation ensures that if the primary inlets are occluded, the secondary paths can maintain airflow, thereby improving reliability without significantly complicating the overall manufacturing process.
Solution Approach 2:
The system changes the spatial parameters of airflow intake by adding lateral inlet paths through the side ducts. This parameter change provides alternative airflow routes that are less susceptible to occlusion from user placement or environmental factors, thereby improving airflow reliability while maintaining manufacturing feasibility through standardized ducting designs.
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 solution enhances cooling capability and reduces fan noise by providing multiple airflow paths, preventing airflow restrictions and maintaining thermal efficiency without altering the device's thickness or ducting design, making it suitable for integration with existing electronic devices.
Implementation Method 1
The fan includes a first fan inlet and a second fan inlet opposite the first fan inlet. A first duct is fluidly coupled to the first fan inlet and couples the first device inlet to the first fan inlet. A second duct is fluidly coupled to the second fan inlet and couples the second device inlet to the second fan inlet.
Implementation Method 2
electronic devices employ thermal cooling systems that cool electronic components of the electronic devices during use
Data Source
AI summary
Thermal management systems for electronic devices and related methods are disclosed. An example electronic device includes a chassis including a first cover and a second cover, the first cover including an upper surface and a plurality of side walls and the second cover including a lower surface of the chassis, the first cover and the second cover defining an internal cavity of the chassis, the first cover including a first device inlet formed in a first side wall of the first cover; a fan positioned in the internal cavity, the fan including a first fan inlet and a second fan inlet opposite the first fan inlet; and a side channel positioned between the first device inlet and the first fan inlet to direct fluid flow between the first device inlet and the first fan inlet.