Air Damper with Segmented Teeth for High-Pressure Airflow Control
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Solution Overview
Problem
Conventional air dampers struggle with controlling airflow accurately at high static pressures, particularly in critical room environments, due to large and uncontrollable changes in airflow from small blade movements, and existing airflow sensors are dependent on orientation and prone to clogging.
Innovation Solution
The damper plate design incorporates multiple airfoil members with varying stiffness and resilient/flexible teeth, along with a gasket, to provide precise airflow control and minimize air leakage, while the airflow sensor uses a ring with orthogonal apertures to measure pressure independently of orientation and reduce clogging.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a conventional damper blade is rotated from closed to slightly open position, then airflow is permitted to pass through, but a large volume of air immediately passes through in an uncontrollable manner
Solution Approach 1:
The damper blade is segmented into multiple adjustable vanes that can be independently positioned. This segmentation allows for progressive opening where each vane can be adjusted to specific angles, enabling precise control of airflow volume rather than sudden bulk flow. The multiple vanes create staged openings that permit gradual increase in airflow.
Solution Approach 2:
The damper system incorporates dynamic adjustment capability where the blade position can be continuously varied rather than fixed at discrete positions. This dynamic control allows the system to respond to changing airflow requirements by adjusting the blade angle in real-time, maintaining precise control across different flow rates.
2Stress or pressure
If the static pressure in the ductwork is high, then airflow control is needed, but tiny movements of the blade damper result in significant changes in airflow
Solution Approach 1:
The damper blade is segmented into multiple adjustable vanes that can be independently positioned. This segmentation allows for progressive opening where each vane can be adjusted to specific angles, enabling precise control of airflow volume rather than sudden bulk flow. The multiple vanes create staged openings that permit gradual increase in airflow.
Solution Approach 2:
The system incorporates sensors that detect airflow conditions and provide feedback to the control mechanism. This feedback loop allows the system to make fine adjustments to blade position based on actual airflow measurements, compensating for pressure variations and maintaining stable airflow control even under high static pressure conditions.
3Measurement precision
If conventional airflow sensors are positioned away from duct bends, then measurement accuracy is maintained, but sensor placement flexibility is limited
Solution Approach 1:
The sensor housing incorporates curved or angled surfaces that align with duct bends. This curved design allows the sensor to be positioned at various angles and locations along bent duct sections while maintaining proper alignment with airflow direction, enabling placement flexibility without sacrificing measurement accuracy.
Solution Approach 2:
The sensor assembly is designed with universal mounting capabilities that accommodate different duct configurations including straight sections and bends. The sensor can function accurately in various orientations and positions, providing multi-functional adaptability for different installation scenarios without requiring separate sensor types.
4Ease of manufacture
If conventional sensors are positioned in certain locations, then installation is simplified, but they become susceptible to clogging
Solution Approach 1:
The sensor housing incorporates curved or angled surfaces that align with duct bends. This curved design allows the sensor to be positioned at various angles and locations along bent duct sections while maintaining proper alignment with airflow direction, enabling placement flexibility without sacrificing measurement accuracy.
Solution Approach 2:
The sensor incorporates protective coverings or membranes that resist clogging while allowing airflow passage. These flexible protective elements can be designed with anti-clog geometries that prevent debris accumulation, maintaining reliability in locations where installation is facilitated by duct geometry.
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 solution achieves precise airflow control and higher flow rates at lower pressures, and the sensor design allows for flexible placement near duct bends without orientation dependency, reducing clogging and maintaining accurate measurements.
Implementation Method 1
The resilient portion has a greater stiffness than the flexible portion
Data Source
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AI summary
An air damper assembly for an air duct having an interior wall and an exterior wall is provided. The air damper assembly includes a damper plate having a periphery and multiple teeth spaced at least partially around and extending from the periphery. The multiple teeth vary in length from a maximum to a minimum over a span of approximately 90 degrees around the periphery. The air damper assembly further includes an axle assembly fixedly coupled to the damper plate and rotatably coupled to the air duct. Rotation of the axle assembly causes the damper plate to rotate within the air duct between a fully open position and a fully closed position to increase or decrease a flow of fluid through the air duct.