Hydroelectric Flow Switch Generator for Fire Sprinkler Systems
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Solution Overview
Problem
Current fire sprinkler systems lack reliable notification mechanisms, especially for occupants inside buildings, and existing fire alarm systems are prone to false alarms and require external power sources, which can fail during emergencies.
Innovation Solution
A self-powered hydroelectric flow switch generator that uses the kinetic energy of water flowing through a sprinkler system to power notification devices, including low-frequency sounders and strobes, eliminating the need for external power and reducing maintenance costs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a fire alarm system with external power source is used, then notification capability is provided, but reliability decreases due to power failure risk during emergencies
Solution Approach 1:
The fire alarm system generates its own power through a hydroelectric generator that converts kinetic energy from water flow in the sprinkler system into electrical energy. This self-powered mechanism eliminates dependency on external power sources, ensuring continuous operation during emergencies when power failures may occur.
Solution Approach 2:
A hydroelectric generator acts as an intermediary device between the water flow system and the fire alarm notification system. The generator converts mechanical energy from moving water into electrical energy, bridging the gap between the sprinkler system's operational state and the alarm system's power requirements.
2Reliability
If traditional waterflow switches with pneumatic time delay mechanisms are used, then water pressure fluctuation filtering is achieved, but reliability decreases due to high failure rates from wear and tear
Solution Approach 1:
The patent replaces the complex pneumatic time delay mechanism with an electronic control system powered by the hydroelectric generator. This substitution eliminates mechanical wear and tear components while maintaining the time delay functionality through electronic timing circuits, significantly improving reliability.
Solution Approach 2:
The system changes the operational parameters of the waterflow detection from pneumatic pressure-based detection to electronic sensor-based detection. This parameter change allows for more reliable detection with fewer moving parts and eliminates the wear issues associated with pneumatic dampers.
3Ease of operation
If exterior riser bells are used for notification, then external attention is drawn, but effectiveness decreases for occupants inside the building
Solution Approach 1:
The patent transitions from single-dimension external auditory notification (exterior bell) to multi-dimensional notification including internal auditory (low-frequency sounders throughout the building) and visual (strobe lights) dimensions. This ensures occupants inside the building receive effective notification regardless of wall attenuation.
Solution Approach 2:
The system implements notification devices at multiple locations throughout the building rather than a single exterior location. Low-frequency sounders are distributed in sleeping areas and common spaces, ensuring local notification effectiveness in each zone where occupants may be present.
4Reliability
If standalone smoke alarms are used, then early detection is provided, but reliability decreases for sleeping occupants with hearing impairment
Solution Approach 1:
The system changes the sound frequency parameter from high-frequency (3 kHz) typical of smoke alarms to low-frequency (520 Hz) notification that is more effective at awakening sleeping occupants and those with hearing impairments. This parameter change maintains early detection capability while improving notification effectiveness.
Solution Approach 2:
The system adds visual notification (strobe lights) as another dimension to complement auditory notification. This multi-sensory approach ensures that occupants who may not respond to auditory signals alone receive effective warning through visual stimuli.
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
Enhances life-safety effectiveness by providing reliable audio and visual alerts without external power, reducing false alarms, and minimizing maintenance, while operating independently of utility services.
Implementation Method 1
A self-powered hydroelectric flow switch generator that uses the kinetic energy of water flowing through a sprinkler system to power notification devices
Data Source
AI summary
The conceived invention simplifies current art methods of incorporating fire notification appliances with fire sprinkler systems by replacing vane and pressure type of waterflow switches with a single water driven generator having dual functionality. It includes power generation and activation when water moves through a sprinkler system. A notification appliance may use audible, visible, or other stimuli to alert the occupants of a fire. The system also includes a waterflow switch output to trigger an external fire/security alarm system when required and a digital controller with a delay timer to prevent false alarms due to water pressure fluctuations. Another embodiment includes both alarm monitoring and circuit supervision to enhance operation and system maintenance.