Normally Open Louver System for Computer Cooling Recirculation
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Solution Overview
Problem
Existing ventilation systems face inefficiencies in preventing recirculation, particularly in computer cooling systems, where normally closed vent flaps require significant energy to maintain an open position, reducing blower efficiency and limiting cooling effectiveness during low-power modes.
Innovation Solution
The implementation of normally open louvers that pivotally rotate between closed and open positions, utilizing gravity and positive air pressure to maintain the open state without relying on blower force, and incorporating travel stops to prevent over-rotation, ensuring effective airflow and energy efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If normally closed vent flaps are used to prevent recirculation, then recirculation is prevented, but significant energy is required to maintain the open position, reducing blower efficiency
Solution Approach 1:
The patent inverts the traditional normally-closed louver design to create a normally-open louver system. The louvers are held open by default using gravity and friction, and close automatically when the blower stops or reduces speed. This inversion eliminates the need for continuous energy consumption to maintain the open position, while still preventing recirculation when needed.
Solution Approach 2:
The louver system is designed to be self-regulating, using the blower's own airflow to open the louvers during operation and the absence of airflow to close them when idle. The system automatically responds to operational conditions without requiring external control mechanisms or additional energy input.
2Reliability
If normally closed vent flaps are used, then recirculation is prevented, but cooling effectiveness is limited during low-power modes
Solution Approach 1:
The louver system transitions from a static, always-closed design to a dynamic, condition-responsive design. The louvers automatically adjust their position based on real-time operational conditions, remaining open during low-power modes to maintain cooling effectiveness while closing during high-power modes to prevent recirculation.
Solution Approach 2:
The system changes the operational parameters of the louver position based on blower speed and airflow conditions. During low-power modes, the louvers remain in an open position to maximize airflow and cooling effectiveness. During high-power modes, they close to prevent recirculation, thus adapting the system's behavior to match operational requirements.
3Duration of action of stationary object
If travel stops are added to prevent over-rotation, then component wear is minimized, but device complexity increases
Solution Approach 1:
The travel stop mechanism is segmented into simple, discrete components that can be easily integrated into the existing louver structure. Rather than adding a complex control system, the solution uses simple mechanical stops positioned at specific locations to limit rotation, maintaining simplicity while protecting components.
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 solution enhances blower efficiency by reducing energy consumption, stabilizes airflow patterns, and allows for effective cooling even in low-power modes, preventing recirculation while minimizing wear and tear on components.
Implementation Method 1
A flow of air in a second direction through the opening, opposite the first direction, rotates the set of louvers from the closed position to the open position
Implementation Method 2
a positive air pressure inside the compartment causes the set of louvers to rotate from the open position to the closed position upon the air-circulation mechanism ceasing
Data Source
AI summary
A frame having a perimeter defines a planar opening. A set of louvers may span from a first edge of the opening to a second edge of the opening. Each louver may be capable of rotating between a closed position and an open position. A set of physical obstructions may prevent the louvers from rotating beyond the open position. Each louver may be offset from the planar opening by a first acute angle when in a closed position, and by a second, larger, acute angle when in the open position. A flow of air in a first direction through the opening may rotate the set of louvers to the closed position. A flow air in the opposite direction through the opening may rotate the set of louvers to the open position such that the flow of air in the opposite direction moves freely through the opening.