Communication Device Air-Channel Segmentation for Thermal Cascade Control
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Solution Overview
Problem
Existing communication devices face challenges with thermal cascade, high thermal resistance, and hot spot concentration due to inadequate air channel designs, particularly in configurations with multiple subracks, leading to inefficient heat dissipation and limited application scenarios.
Innovation Solution
A communication device with independent air channels for each board area, an interlayer air channel, and air mixing channels, along with air cooling modules, to facilitate uniform airflow distribution and temperature management, reducing thermal cascade and hot spots.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If conventional air channel designs (vertical, transverse, longitudinal) are used in communication devices with multiple subracks, then the device structure is simple, but thermal cascade, high thermal resistance, and hot spot concentration occur leading to poor heat dissipation
Solution Approach 1:
The air channel system is segmented into multiple independent channels: first air channel for first board area, second air channel for second board area, and third air channel for third board area. Each channel independently supplies air to its corresponding board area, preventing thermal cascade and enabling separate temperature control for each segment, thus resolving the heat dissipation issue without requiring a completely new complex structure
Solution Approach 2:
The patent introduces air mixing channels that extend in multiple dimensions (upward to first air mixing channel, downward to second air mixing channel) from the second board area, transforming the conventional single-plane air flow into a three-dimensional air distribution system. This dimensional expansion enables better air circulation and heat dissipation while maintaining reasonable structural complexity
2Temperature
If air flows in a single direction between subrack and rack wall for intermediate subrack board area, then the air channel structure is simple, but wind resistance is high and heat dissipation is affected
Solution Approach 1:
The air flow system is made dynamic by introducing multiple flow paths and mixing channels. Air can flow from the second board area upward through the first air mixing channel or downward through the second air mixing channel, creating adaptive flow patterns that reduce wind resistance and improve heat dissipation efficiency compared to static single-direction flow
Solution Approach 2:
The air mixing channels act as intermediaries between the second board area and the first/third board areas. These mixing channels facilitate air exchange and reduce pressure differences, thereby lowering wind resistance while improving overall heat dissipation without requiring complex direct connections between all components
3Ease of operation
If air flows through upper and lower subrack board areas for intermediate subrack board area, then air distribution is improved, but severe thermal cascade occurs in slot areas limiting board configuration
Solution Approach 1:
By segmenting the air supply system into separate first, second, and third air channels for respective board areas, the patent prevents thermal cascade from propagating between board areas. Each board area receives independently controlled air supply, eliminating the thermal interference that would otherwise limit board configuration options
Solution Approach 2:
The air mixing channels are designed to pre-mix air from the second board area before distributing it to upper and lower board areas. This preliminary air mixing action prevents severe thermal cascade in slot areas by ensuring more uniform air temperature and composition before it reaches other board areas, thereby enabling greater board configuration flexibility
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
Improves heat dissipation performance by up to 40% and addresses thermal cascade and high wind resistance issues, ensuring effective heat dissipation and noise reduction.
Implementation Method 1
the first air mixing channel and the second air mixing channel are respectively in communication with the system air discharge channel via respective air cooling modules
Data Source
Figure 1
Figure 2
Figure 3A
AI summary
A communication device includes a shell, a first board area, a second board area and a third board area, which are sequentially arranged from top to bottom and each provided with an independent air channel. An interlayer air channel in communication with the air channel of the second board area is provided behind the first board area, the second board area and the third board area. Air discharged from air channel of the second board area is guided to at least one of a position above the first board area or a position below the third board area via the interlayer air channel, to be mixed with air discharged from at least one of the air channel of the first board area or the air channel of the third board area, and mixed air is then discharged via an air cooling module and a system air discharge channel.