Cantilevered Heat Spreader Fingers for Pluggable Module Thermal Coupling
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Solution Overview
Problem
Conventional communication systems face challenges in dissipating heat generated during operation and minimizing electromagnetic interference (EMI), particularly in tight spaces where airflow is inadequate, and existing heat sinks struggle to effectively couple with finned pluggable modules.
Innovation Solution
A heat spreader is designed to thermally couple with pluggable modules having heat transfer fins, featuring cantilevered heat transfer fingers that fit into channels between the fins, allowing for efficient heat transfer from the fins to the main body and subsequent dissipation, while also providing EMI shielding.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If heat sinks are arranged along the top of the cage to dissipate heat from pluggable modules, then heat dissipation capability is improved, but the overall size of the communication system increases
Solution Approach 1:
The heat spreader transitions heat dissipation from a vertical arrangement (heat sinks on top of the cage) to a horizontal arrangement (heat spreader at the rear of the cage), utilizing the depth dimension of the cage to achieve effective heat dissipation without increasing the overall footprint of the system
2Temperature
If pluggable modules are equipped with fins to increase surface area for heat transfer, then heat transfer efficiency is improved, but thermal coupling with heat sinks becomes difficult
Solution Approach 1:
The heat spreader acts as an intermediary component between the finned pluggable module and the cage structure, providing a flat mounting surface that simplifies thermal coupling while maintaining effective heat transfer from the fins through direct contact
3Temperature
If airflow is used to dissipate heat from communication system components, then heat dissipation is achieved, but inadequate airflow occurs due to tight space constraints
Solution Approach 1:
The heat spreader utilizes the existing cage structure and available space within the communication system to achieve heat dissipation, requiring no additional external components or increased system volume, and works effectively in tight spaces where airflow may be limited
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
The heat spreader effectively enhances thermal transfer and reduces EMI, improving the reliability and performance of communication systems by efficiently dissipating heat without increasing the system's size and ensuring direct engagement with the heat transfer fins.
Implementation Method 1
The mating edges are configured to face and be thermally coupled to corresponding heat transfer fins. The heat transfer fingers transfer heat from the heat transfer fins rearward toward the distal ends and into the main body.
Data Source
AI summary
A heat spreader includes a main body extending between a front and a rear configured to be mounted to a cage and heat transfer fingers cantilevered forward from the front of the main body. The heat transfer fingers each have a fixed end, a distal end, a top, a bottom and mating edges facing each other across gaps. The heat transfer fingers are configured to be received in corresponding channels between heat transfer fins of a pluggable module as the pluggable module is installed in the cage through the front end with the gaps receiving the heat transfer fins. The mating edges are configured to face and be thermally coupled to corresponding heat transfer fins. The heat transfer fingers transfer heat from the heat transfer fins rearward toward the distal ends and into the main body.