Circular LED Array for Remote VAV Motor Shaft Rotation Verification
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Solution Overview
Problem
HVAC system components, particularly variable air volume (VAV) equipment located in remote and inaccessible areas, pose challenges for technicians to visually inspect and verify operation without the need for ladders or lifts, risking safety and efficiency.
Innovation Solution
A controller system with a circular LED array that illuminates and rotates to indicate the direction of motor shaft rotation, allowing remote verification of VAV equipment operation and controller location, eliminating the need for physical proximity and reducing safety risks.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If technicians physically inspect VAV equipment in remote locations, then they can directly observe component operation, but they require ladders or lifts which create safety risks and reduce efficiency
Solution Approach 1:
The patent replaces the mechanical inspection method (technicians physically accessing equipment with ladders or lifts) with an optical indication system. The LED array provides visual feedback about component operation, allowing technicians to verify damper shaft rotation and controller location remotely without physical access to high or hard-to-reach locations.
Solution Approach 2:
The patent introduces an intermediary indicator system (LED array coupled to the motor shaft) that mediates between the inaccessible component (damper shaft) and the technician. The LED array rotates in sync with the motor shaft, providing indirect visual information about component operation without requiring direct observation of the shaft itself.
2Loss of information
If technicians access remote VAV equipment locations, then they can verify component operation, but service time increases due to setup and safety precautions
Solution Approach 1:
The patent replaces time-consuming physical inspection procedures with immediate optical feedback. The LED array provides real-time visual confirmation of motor shaft rotation and direction, eliminating the need for technicians to set up ladders, position equipment, or perform complex manual verification procedures.
3Device complexity
If a simple indicator system is used, then device complexity is reduced, but the ability to indicate direction of rotation and controller location is insufficient
Solution Approach 1:
The patent uses a circular arrangement of LEDs that rotates with the motor shaft. The curved/circular geometry of the LED array allows it to indicate rotational direction through its movement pattern - the LEDs trace a circular path that visually communicates the direction of rotation (clockwise or counterclockwise) while maintaining a compact, simple structure.
Solution Approach 2:
The patent employs a dynamic indicator system where the LED array rotates in synchronization with the motor shaft. This dynamic movement provides intuitive visual feedback about rotation direction and operational status without requiring complex static displays or additional sensors. The system adapts its indication based on the actual motor operation.
Data Source
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AI summary
Embodiments are provided for a method for verifying operation of a variable air valve (VAV) equipment 102. Embodiments can include operating a motor having a motor shaft coupled to VAV equipment 102 in one of a plurality of modes, and controlling a direction of rotation of the motor shaft coupled to the VAV equipment 102. Embodiments can also include providing an indication of the direction of rotation of the motor shaft coupled to the VAV equipment 102. Also provided are embodiments for a system 100, 200 that is used for verifying the operation of VAV equipment 102.