Centrifugal Fan Case Cutout for Circuit Board Insertion
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Solution Overview
Problem
The increasing heat values of components in portable computers pose a challenge for cooling structures, as larger cooling fans restrict the mounting area and circuit board space, necessitating improved cooling performance without reducing the board's area.
Innovation Solution
A cooling structure featuring a centrifugal fan with a fan case that includes an enlarged exhaust port and a cut portion allowing part of the circuit board to be inserted, enhancing airflow without reducing the board's area, and incorporating a radiating member and thermal transfer member for effective heat dissipation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If a large cooling fan is installed to improve cooling performance, then cooling performance is improved, but the mounting area of the housing and the area of the circuit board are restricted
Solution Approach 1:
The fan case is segmented by providing a cut portion that separates the exhaust port area from the board insertion area. This allows the circuit board to be inserted through the cut portion while the exhaust port maintains its enlarged size, resolving the conflict between cooling performance and board area.
Solution Approach 2:
The exhaust port is enlarged in the radial direction of the centrifugal fan, and the cut portion is provided in the circumferential direction. By utilizing different spatial dimensions and orientations, both the enlarged exhaust port for cooling and the board insertion space are achieved without compromising the circuit board area.
2Productivity
If the exhaust port is enlarged to increase airflow, then cooling performance is improved, but the structure becomes more complex
Solution Approach 1:
The cut portion and exhaust port are merged into a single fan case structure. The cut portion serves dual purposes: it allows circuit board insertion and simultaneously defines part of the exhaust port boundary. This integration reduces structural complexity while maintaining enlarged airflow capability.
Solution Approach 2:
The fan case is designed with multi-functionality: it provides the exhaust port for airflow, contains the cut portion for board insertion, and maintains structural support. This universal design reduces the need for additional separate components, simplifying the overall structure while achieving both cooling and mounting requirements.
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 improves cooling performance by enlarging the exhaust port and allowing the circuit board to maintain its area, increasing airflow, and effectively cooling components without the need for a remote-heat-exchanger type cooling structure.
Implementation Method 1
fan blades that rotate to blow air in a centrifugal direction
Implementation Method 2
radiating member and thermal transfer member for effective heat dissipation
Implementation Method 3
cooling structure for cooling a heating component
Data Source
AI summary
According to one embodiment, an electronic apparatus is provided with a housing, a circuit board in the housing, fan blades configured to rotate and blow air in a centrifugal direction, and a casing which contains the fan blades. The casing includes an exhaust port and a cut portion which opens in a centrifugal direction different from a direction in which the exhaust port opens, from a perspective of a rotation center of the fan blades, and into which a part of the circuit board is inserted.