Network Device Thermal Management with Segmented Airflow Channels
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The internal heat dissipation architecture of network devices is inefficient due to a backplane blocking airflow between the front and rear board modules, leading to complex air ducts and poor heat dissipation, which can shorten the service life of the rear board module.
Innovation Solution
A network device design featuring separate heat dissipation channels and fans for the front and rear board modules, with orthogonal connectors and an air-guiding backplane to ensure unobstructed airflow, creating independent first and second heat dissipation channels that improve heat dissipation efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a backplane is disposed between front and rear board modules to implement signal transmission, then electrical connection is achieved, but the backplane blocks ventilation and creates complex air ducts with poor heat dissipation
Solution Approach 1:
The patent divides the heat dissipation system into independent channels: a first heat dissipation channel for the front board module and a second heat dissipation channel for the rear board module. This segmentation allows each module to have dedicated airflow paths, eliminating the need for complex interconnected ducts while maintaining effective heat dissipation for both modules simultaneously.
Solution Approach 2:
The patent introduces air guiding openings in the backplane as intermediary structures that allow airflow to pass through the backplane without compromising its electrical connection function. These openings serve as mediators that resolve the conflict between the backplane's dual roles as both an electrical connector and a potential airflow obstacle.
2Device complexity
If air for dissipating heat from the rear board module first passes through the front board module, then a single heat dissipation path is used, but cascading heating occurs and the rear board module works in a high temperature environment
Solution Approach 1:
The patent implements separate heat dissipation channels for the front and rear board modules, with the second channel providing direct external airflow to the rear board module without passing through the front module. This segmentation eliminates cascading heating by ensuring that hot air from the front module does not recirculate to the rear module, maintaining lower operating temperatures.
Solution Approach 2:
The patent introduces a ventilation opening on the rear surface of the shell, creating a new dimension for airflow entry. This allows the second heat dissipation channel to draw cool air directly from the external environment through the rear ventilation opening, bypassing the front module entirely and providing fresh cool air to the rear board module.
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 enhances heat dissipation capabilities, maintaining the rear board module in a suitable temperature environment and extending its service life while ensuring the reliability of the network device.
Implementation Method 1
a fan, to dissipate heat for the front and rear board modules
Implementation Method 2
an airflow sequentially passes, from the front end of the shelf, through the front board module in the first accommodation area, the third channel, and the first fan to form a first heat dissipation channel
Data Source
AI summary
A network device includes a shelf in which a first accommodation area, a second accommodation area, a first channel, and a second channel are disposed. A third channel is formed between adjacent rear board modules or between the rear board module and the shelf. A first fan and a second fan are both disposed at a rear end of the shelf, the first fan faces the third channel, and the second fan faces the second channel. A first airflow sequentially passes, from a front end of the shelf, through the front board module in the first accommodation area, the third channel, and the first fan to form a first heat dissipation channel. A second airflow sequentially passes through the inside of the rear board module, the second channel, and the second fan after entering the first channel from the outside of the shelf to form a second heat dissipation channel.