HVAC damper control
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Solution Overview
Problem
HVAC dampers often fail to maintain the correct operational position during power outages or faults, leading to potential fire and gas spread due to manual operation challenges in confined spaces, and reliance on expensive battery or compressed air solutions.
Innovation Solution
A manual actuator system that automatically locks into place when power is restored, allowing the HVAC damper to self-adjust and prevent manual override, ensuring the damper remains closed during emergencies without needing physical intervention.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If manual actuator is used to open and close damper during power outages, then damper can be operated without power, but damper may be forgotten in open position and fail to close when needed
Solution Approach 1:
The actuator automatically detects power restoration and self-corrects the damper position by returning to closed position when power is restored, eliminating the need for manual intervention and preventing the damper from being forgotten in the open position
Solution Approach 2:
The actuator incorporates position detection capability that monitors whether the damper is in the correct closed position and automatically corrects the position when power is restored, providing feedback-based automatic correction without manual intervention
2Reliability
If battery or compressed air bottle is used to open damper, then damper cannot remain in open position when fuse triggered, but system becomes expensive and complex
Solution Approach 1:
The actuator uses the restored power supply itself to drive the damper back to the closed position, eliminating the need for external energy storage devices like batteries or compressed air bottles, thereby reducing system complexity and cost while maintaining reliability
Solution Approach 2:
The actuator changes its operational state based on power availability - when power is restored, it automatically transitions from manual/maintenance mode to automatic operation, using the available electrical power to return the damper to the correct position
3Ease of operation
If manual actuator is used in confined spaces, then damper can be operated manually, but operation becomes difficult and cumbersome
Solution Approach 1:
The actuator automatically performs the damper position correction when power is restored, eliminating the need for personnel to physically access confined spaces and manually operate the damper, thereby improving both ease of operation and response speed
Data Source
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AI summary
A hvac damper control is described. In an example, an apparatus comprises a manual actuator, wherein in a manual use of the manual actuator, the manual actuator is configured to open a hvac damper to an open position and close the damper to a closed position. The apparatus comprises an actuator coupled to a manual actuator, wherein the actuator is configured to open and close the hvac damper by being connected to the manual actuator. When the actuator is connected to propulsion, the actuator is configured to drive itself to the open position, wherein the actuator is configured to lock to the manual actuator. In other examples, a method, a hvac damper, and a hvac system are discussed along with the features of the apparatus.