Dual Fan Cooling Device for Midplane Rear Face Heat Dissipation
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Solution Overview
Problem
Cooling air introduced into electronic equipment enclosures often fails to effectively flow to the rear face of midplanes, leading to reduced cooling efficiency on the exhaust port side, as it primarily passes through the width direction and is exhausted without adequately reaching the rear face.
Innovation Solution
A cooling device with a first fan unit generating airflow from the front to the rear of the device case and a second fan unit positioned closer to the front, which takes in air from one side and directs it to the other side, enhancing airflow to the rear side of the midplane for improved cooling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If cooling air is introduced through the intake port and passes through the width direction of the midplane, then the cooling air can be exhausted through the exhaust port, but the cooling air is unlikely to flow on the rear face side of the midplane, reducing cooling efficiency on the exhaust port side
Solution Approach 1:
The cooling device is divided into two independent fan units: a first fan unit that generates airflow from front to rear, and a second fan unit that redirects air from one side to the other side. This segmentation allows each fan unit to address specific cooling needs, with the second fan unit specifically targeting the rear face side cooling deficiency.
Solution Approach 2:
The second fan unit acts as an intermediary mechanism that intercepts air flowing through the width direction and redirects it to the rear face side. This intermediary action ensures that cooling air reaches the previously under-cooled rear face side region without requiring a complete redesign of the airflow path.
2Device complexity
If a cooling device is arranged on the rear face side of the midplane, then the device can be compact, but the cooling air flow pattern cannot effectively reach the rear side of the midplane
Solution Approach 1:
The cooling device is divided into two independent fan units: a first fan unit that generates airflow from front to rear, and a second fan unit that redirects air from one side to the other side. This segmentation allows each fan unit to address specific cooling needs, with the second fan unit specifically targeting the rear face side cooling deficiency.
Solution Approach 2:
The second fan unit introduces a lateral airflow component by redirecting air from one side to the other side in the width direction. This dimensional change in airflow pattern ensures that cooling air reaches the rear face side region, which would otherwise be inaccessible through conventional front-to-rear airflow alone.
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 configuration effectively cools circuitries on the rear side of the midplane, enhancing cooling efficiency on the exhaust port side without the need for additional vertical ducts, while maintaining the capacity for middle units in the exhaust-side storage chamber and reducing the height and width of the cooling device.
Implementation Method 1
a first fan unit for generating a flow of air from a side with the case front face to a side with a case rear face of the device case
Implementation Method 2
a second fan unit, being stored at closer position to the side with the case front face than the first fan unit, for taking in part of air passing through one side in a width direction of the device case and flowing to the first fan unit and sending out the part of the air to the other side in the width direction of the device case
Implementation Method 3
The air flow by the second fan unit can effectively cool circuitries at the rear side of the midplane
Data Source
AI summary
A cooling device includes a device case that is arranged in an enclosure having a midplane, with a case front face facing the midplane. The device case includes a first fan unit for generating a flow of air from a side with the case front face to a side with a case rear face of the device case and a second fan unit, being stored at closer position to the side with the case front face than the first fan unit, for taking in part of air passing through one side in a width direction of the device case and flowing to the first fan unit and sending out the part of the air to the other side in the width direction of the device case. The air flow by the second fan unit can effectively cool circuitries at the rear side of the midplane.