Expansion Card Mounting Assembly with Moveable Plate
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Solution Overview
Problem
Computer systems, particularly rack-mounted servers, face challenges in managing waste heat and accommodating expansion cards of varying lengths within existing chassis designs, which can restrict airflow and hinder heat transfer.
Innovation Solution
An expansion card mounting assembly with a moveable plate and multiple levels, allowing for secure mounting of expansion cards with different lengths and promoting airflow between levels to enhance heat transfer, includes a mounting structure that supports circuit boards and expansion cards on both sides with an opening for airflow in multiple directions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a fixed-length holder is used for expansion cards, then the holder can securely accommodate cards of a specific length, but it cannot accommodate expansion cards with different lengths
Solution Approach 1:
The holder includes a moveable plate that can be positioned at different locations along the holder body. This dynamic adjustment mechanism allows the holder to adapt to expansion cards of various lengths by moving the plate to the appropriate position, thereby securing cards with different dimensions using a single versatile holder design
Solution Approach 2:
The holder is designed to accommodate multiple types of expansion cards with different lengths (e.g., full-length, half-length, quarter-length cards) using a single holder structure. The moveable plate enables one holder to perform the function of multiple fixed-length holders, achieving multi-functionality and compatibility across different card form factors
2Temperature
If expansion cards are mounted in a chassis, then the cards are secured and connected to the system, but waste heat generated by the cards is trapped and heat transfer is hindered
Solution Approach 1:
The holder is designed as a separate, independent component that can be positioned within the chassis without requiring the entire chassis structure to be complex. The segmented design allows the holder to create localized airflow channels around expansion cards, enabling heat dissipation functionality to be added without fundamentally redesigning the entire chassis
Solution Approach 2:
The holder creates three-dimensional airflow pathways by positioning components at different heights and orientations. The moveable plate and support structure establish vertical and horizontal airflow channels that allow cooling air to reach expansion cards from multiple directions, enhancing heat transfer through multi-dimensional airflow rather than simple linear ventilation
3Quantity of substance
If multiple expansion cards with different lengths are mounted on a single circuit board, then card density is increased, but airflow between cards is restricted and heat transfer is reduced
Solution Approach 1:
The moveable plate can be adjusted to different positions depending on which combination of expansion cards is installed. This dynamic positioning allows the holder to optimize airflow channels for various card configurations, ensuring that cooling air can effectively reach each card regardless of its length or position, thereby maintaining heat transfer efficiency while supporting high card density
Solution Approach 2:
The holder provides localized airflow management tailored to each expansion card's specific position and length. By adjusting the moveable plate, the holder creates customized airflow patterns that direct cooling air to each card's heat-generating components, ensuring that each card receives adequate cooling regardless of its location in the dense arrangement
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 design effectively secures expansion cards of varying lengths, improves airflow, and enhances heat transfer by allowing air to flow across and between cards, addressing the limitations of traditional designs that restrict airflow and hinder heat dissipation.
Implementation Method 1
The mounting structure includes an opening between the first level and the second level of the expansion card mounting assembly. The opening is configured to permit airflow between the expansion cards mounted on the first side of the circuit board and the expansion cards mounted on the second side of the circuit board.
Data Source
AI summary
An expansion card mounting assembly includes a mounting structure and a circuit board coupled to the mounting structure. Expansion cards are mounted on a top side and a bottom side of the circuit board and secured at opposite ends by a moveable plate of the expansion card mounting assembly. The mounting structure includes an opening along a length of the expansion cards that allows air to flow over the expansion cards in multiple directions including a vertical direction. The moveable plate and mounting structure are configured to allow a position of the moveable plate on the mounting structure to be adjusted to mount expansion cards having different lengths in the expansion card mounting assembly.