Front Accessible Fan Tray for Front-to-Back Cooling
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Solution Overview
Problem
Modular electronic systems with side-to-side airflow face challenges in cooling high power optical transceivers, especially in small form factor designs, as it leads to recirculation of hot air and insufficient cooling, making it difficult to maintain components at a normal temperature, particularly when deployed in closed cabinets or against walls.
Innovation Solution
Implementing a flexible fan tray with front-to-back airflow that allows air to enter from the cold aisle and exit through the rear, enabling uniform airflow distribution across optical transceivers, while maintaining front accessibility for field replaceable units, allowing for deployment in closed cabinets or back-to-back configurations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If side-to-side airflow cooling is used in modular electronic systems, then front accessibility for field replaceable units is enabled, but cooling efficiency for high power optical transceivers becomes insufficient due to hot air recirculation
Solution Approach 1:
The patent inverts the traditional side-to-side airflow direction to front-to-back airflow. The fan tray is positioned at the rear of the chassis and directs airflow from the front panel through the optical transceivers to the rear exhaust, preventing hot air recirculation and improving cooling efficiency while maintaining front accessibility for module replacement.
2Volume of moving object
If small form factor design is implemented, then device compactness is achieved, but cooling capability for high power components becomes insufficient
Solution Approach 1:
The patent changes the airflow dimension from horizontal (side-to-side) to depth-based (front-to-back). By utilizing the depth dimension of the chassis for airflow path, the system achieves effective cooling of high power components without increasing the overall form factor, as the airflow moves through the existing depth space rather than requiring additional horizontal or vertical space.
3Temperature
If front-to-back airflow is implemented, then cooling efficiency is improved, but rear accessibility is required for fan tray maintenance
Solution Approach 1:
The fan tray is designed with dynamic positioning capability, allowing it to be moved between a rear operating position for optimal front-to-back airflow cooling and a front accessible position for easy maintenance and replacement. The flexible fan tray can slide along guide rails or be repositioned to different locations within the chassis, providing both cooling efficiency and operational accessibility.
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 provides improved cooling efficiency for high power optical transceivers with front-to-back airflow, ensuring all components remain at a normal temperature, even in compact designs, and allows for easy replacement of modules without requiring rear accessibility, enabling deployment in various configurations.
Implementation Method 1
a flexible fan tray with front-to-back airflow that allows air to enter from the cold aisle and exit through the rear, enabling uniform airflow distribution across optical transceivers
Implementation Method 2
Implementing a flexible fan tray with front-to-back airflow that allows air to enter from the cold aisle and exit through the rear, enabling uniform airflow distribution across optical transceivers
Data Source
AI summary
In one embodiment, an apparatus includes a fan tray comprising a plurality of fans for cooling modules within a modular electronic system with airflow from a front of the modular electronic system to a back of the modular electronic system, and a hinge member for connecting the fan tray to a front panel of the modular electronic system with the fans positioned in front of the modules. The fan tray is rotatable on the hinge member for movement away from the front panel to allow for replacement of one of the modules.