Curved Shutter Blade for Low-Speed Fan Cooling
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Solution Overview
Problem
Existing shutter designs for fan units in cooling systems may fail to open at reduced fan rotation speeds, leading to inefficient cooling and potential overheating of electronic devices, as they rely on air pressure to open ventilation holes, which can be insufficient at lower fan speeds, causing warm air to recirculate and reduce cooling efficiency.
Innovation Solution
A shutter design featuring a louver with a curved air receiving surface and a turning portion, where the blade is pivotally supported, allowing it to open ventilation holes effectively with reduced air flow by increasing the moment required to open and decreasing the moment to close, ensuring stable operation even at lower fan speeds.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a conventional air-pressure type shutter is used to close the ventilation hole when the fan stops, then warm air backflow is prevented, but the shutter may fail to open at reduced fan rotation speeds, causing cooling efficiency to deteriorate
Solution Approach 1:
The blade is designed with a curved air receiving surface instead of a flat surface. This curvature increases the effective area for receiving air flow and generates a larger moment force when air passes over it, enabling the blade to open reliably even at reduced fan rotation speeds while maintaining proper shutter function
Solution Approach 2:
The invention changes the geometric parameters of the blade by curving its air receiving surface. This parameter modification alters the aerodynamic characteristics, allowing the blade to respond effectively to lower air flow conditions while maintaining its ability to open and close the ventilation hole as required
2Use of energy by moving object
If the fan rotation speed is reduced to conserve power and reduce noise, then energy consumption decreases, but the air flow becomes insufficient to open the shutter, causing warm air to recirculate and cooling efficiency to drop
Solution Approach 1:
The curved air receiving surface on the blade amplifies the moment generated by reduced air flow, allowing the shutter to open effectively at lower fan speeds. This enables the system to operate at reduced power consumption while maintaining sufficient cooling performance
Solution Approach 2:
By modifying the blade's geometric parameters through curvature, the system can achieve effective shutter operation with lower air flow conditions, thereby enabling energy-efficient fan operation without sacrificing cooling efficiency
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 shutter design enhances the ability to open ventilation holes with a smaller amount of air flow, maintaining efficient cooling and preventing overheating, even when the fan rotation speed is lowered to conserve power and reduce noise.
Implementation Method 1
the blade turns about a turning axis of the turning portion to open the ventilation hole by receiving air passing through the ventilation hole
Implementation Method 2
the blade has a shape in which an air receiving surface which receives the air is curved toward a direction in which the blade turns to open the ventilation hole
Data Source
AI summary
A shutter includes a base that has a ventilation hole, and a louver that is attached to the base and opens and closes the ventilation hole, wherein the louver includes a turning portion pivotally and turnably supported on the base, and a blade coupled to the turning portion at one end, the blade turns about a turning axis of the turning portion to open the ventilation hole by receiving air passing through the ventilation hole, and the blade has a shape in which an air receiving surface which receives the air is curved toward a direction in which the blade turns to open the ventilation hole, with respect to a plane which couples the turning axis and a turning end of the blade.