Structurally enhanced fan louver assembly
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Solution Overview
Problem
Computer servers in traditional systems are unsupported at their centers, making them prone to bending and damage during transportation and installation due to high downward forces, which can occur during handling or dropping.
Innovation Solution
A server chassis with a movable bulkhead featuring a set of louvers that can move between closed and opened positions, providing structural support and airflow, with leading and trailing edge contact features to enhance rigidity and airflow management.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If servers are supported only on two opposite sides in traditional server racks, then the server rack structure is simple, but the servers are prone to bending and damage during transportation and installation due to unsupported centers
Solution Approach 1:
The bulkhead is segmented into multiple louvers that can independently move between closed and opened positions. When closed, these segmented louvers work together to form a continuous supportive wall structure across the bulkhead, providing distributed support to the server. This segmentation allows the bulkhead to provide structural support without requiring a fully rigid complex structure, as each louver contributes to the overall support when in the closed position.
Solution Approach 2:
The bulkhead louvers are designed to be movable rather than fixed, transitioning between closed and opened positions based on operational requirements. During transportation and installation, the louvers close to provide structural support to the server. During normal operation, they open to allow airflow. This dynamic capability allows the same structure to serve dual purposes: providing structural strength when needed and enabling cooling when needed, without requiring separate fixed structures for each function.
2Stability of the object's composition
If a movable bulkhead with louvers is used to provide structural support, then server deflection is reduced, but the device complexity increases
Solution Approach 1:
The movable bulkhead with louvers serves multiple functions: it provides structural support to reduce server deflection when closed, enables airflow for cooling when opened, and can be positioned at different locations within the server chassis. This multi-functionality means that a single mechanism replaces what would otherwise require separate structures for support and cooling, actually reducing overall system complexity despite the added mobility feature.
Solution Approach 2:
The bulkhead structure changes its physical parameters (position, orientation) by moving the louvers between closed and opened states. This parameter change allows the same physical structure to provide different functions: when closed, it provides structural support with high rigidity; when opened, it allows airflow with low resistance. The ability to change parameters dynamically allows one structure to replace multiple static structures.
3Stability of the object's composition
If the bulkhead is kept closed to provide continuous structural support, then server stability is improved, but airflow for cooling is blocked
Solution Approach 1:
The bulkhead louvers are designed to be movable rather than fixed, transitioning between closed and opened positions based on operational requirements. During transportation and installation, the louvers close to provide structural support to the server. During normal operation, they open to allow airflow. This dynamic capability allows the same structure to serve dual purposes: providing structural support when needed and enabling cooling when needed, without requiring separate fixed structures for each function.
Solution Approach 2:
The bulkhead operates in periodic cycles: closed during transportation and installation phases to provide structural support, then opened during normal operational phases to enable cooling airflow. This periodic switching between states allows the system to optimize for structural stability during vulnerable phases and for thermal management during operational phases, addressing both requirements through time-based separation of functions.
Data Source
AI summary
A server includes a printed circuit board (PCB), an electronic component connected to the PCB, and a chassis connected to the PCB. The chassis includes a first end with a first aperture configured to allow airflow into the server, a second end with a second aperture configured to allow the airflow out of the server after having passed across the electronic component, and a movable bulkhead comprising a first set of louvers, the movable bulkhead being movable between a closed position and an opened position, wherein each of the louvers includes a leading edge contact feature configured to interface with a trailing edge of a respective adjacent louver. In the closed position, the first set of louvers forms a wall in a primary path of the airflow, and, in the opened position, the first set of louvers are oriented in a direction of the primary path of the airflow.