Pluggable Network Module Heat Sink Design
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Solution Overview
Problem
Current network cabinet cooling systems are inadequate for high-power components located near connectors, as they primarily focus on the portion of the pluggable module inserted into the socket, neglecting the exterior surface where high-power components like optical transceiver ICs dissipate heat, leading to unsatisfactory cooling and potential temperature issues.
Innovation Solution
Providing a heat sink on the exterior surface of the pluggable module that protrudes from the socket, featuring parallel fins aligned with the axis of insertion to enhance thermal coupling with circulating air, thereby improving heat dissipation from high-power components without compromising air flow or risking cable/fiber entrapment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If cooling systems focus only on the socket-inserted portion of modules, then the cooling system structure remains simple, but high-power components on the exterior surface experience insufficient cooling and temperature issues
Solution Approach 1:
The cooling solution is segmented into two independent heat sink portions: one integrated into the socket structure for cooling the inserted portion of modules, and another attached to the exterior surface for cooling high-power components. This segmentation allows each cooling portion to independently serve its specific thermal zone without requiring a completely redesigned cooling system.
Solution Approach 2:
The cooling approach extends from a single-dimension (socket-only) solution to a two-dimension solution by adding exterior surface cooling. The second heat sink portion attaches to the exterior surface, creating a multi-zone cooling architecture that addresses thermal issues in both the inserted and protruding portions of the module.
2Loss of energy
If heat sinks are added to the exterior surface, then heat dissipation from high-power components improves, but air flow patterns may be disrupted and cables/fibres risk entrapment
Solution Approach 1:
The exterior heat sink portion is designed with locally adapted features: rounded edges and chamfers at specific locations to prevent cable entrapment, while maintaining fin structures in areas optimized for heat dissipation. Different regions of the heat sink have different geometries suited to their local functions - heat transfer efficiency versus cable safety.
Solution Approach 2:
The heat sink features incorporate rounded edges and curved surfaces instead of sharp angles, particularly at the boundaries where cables and fibres pass nearby. This spheroidality eliminates crevices where cables could become trapped, while the main body retains fin structures for effective heat dissipation.
3Loss of energy
If heat sinks are added to the exterior surface, then heat dissipation improves, but the module structure becomes more complex
Solution Approach 1:
Rather than redesigning the entire module structure, the solution applies partial action by adding only the necessary exterior heat sink portion to the specific areas requiring enhanced cooling. The rest of the module structure remains unchanged, minimizing structural complexity while achieving the required heat dissipation improvement.
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 effectively reduces the temperature of internal components, allowing for higher power dissipation, enhanced safety, reliability, and performance, while maintaining existing cooling efficiency and preventing user injury or cable/fiber damage.
Implementation Method 1
a heat sink on a first surface of the second portion
Implementation Method 2
thermal coupling with circulating air
Data Source
AI summary
In one embodiment, a pluggable module for insertion into a socket of a network cabinet is disclosed, the pluggable module comprising a body having first and second portions arranged along an axis, wherein the module is arranged for insertion of the first portion into said socket in a direction of insertion along the axis, whereupon the second portion protrudes from said socket along the axis and away from the direction of insertion, and wherein the second portion comprises a first heat sink on a surface of the second portion, wherein the first heat sink comprises a plurality of parallel fins aligned with the axis of insertion.