Digital Pressure Switch for Fire Sprinkler Pump Control
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Solution Overview
Problem
Conventional mechanical pressure switches in dry pipe and pre-action fire sprinkler systems face limitations such as limited adjustability, temperature-induced drift, high voltage exposure during adjustments, imprecise calibration, inability to detect rapid fluid pump cycling, and increased leak rates leading to premature compressor failure, along with power outage issues that exceed National Fire Protection Association fill time requirements.
Innovation Solution
A digital pressure switch with a pressure sensor, relays, an amperage sensor, and a controller that measures and processes pressure and amperage data to activate or deactivate the fluid pump, also featuring a communication module for remote monitoring and data transmission to an external server, enabling precise control and detection of fluid pump cycling and leak rates.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If conventional mechanical pressure switches are used, then the system can operate with simple mechanical components, but the adjustability range is limited and calibration precision is poor
Solution Approach 1:
The patent replaces the conventional mechanical pressure switch with a digital pressure switch that uses electronic sensors (pressure sensor, amperage sensor) and a controller to detect pressure and control pump operation. This substitution eliminates mechanical limitations while providing digital adjustability and precise calibration through electronic means.
Solution Approach 2:
The digital pressure switch allows for adjustable pressure thresholds and operational parameters to be set and modified electronically, enabling a wide range of adaptability. The controller can process data from sensors and adjust pump operation based on varying pressure conditions, providing versatile control without mechanical reconfiguration.
2Stability of the object's composition
If conventional mechanical pressure switches are used, then the device structure remains simple, but temperature changes cause drift in pressure ON/OFF settings
Solution Approach 1:
By replacing the mechanical pressure switch with a digital system using electronic sensors and a controller, the patent eliminates the temperature-sensitive mechanical components. Electronic sensors provide stable readings across varying temperatures, and the controller can compensate for environmental effects, ensuring consistent pressure thresholds regardless of ambient conditions.
Solution Approach 2:
The digital pressure switch incorporates feedback mechanisms where the controller continuously monitors pressure sensor data and adjusts pump operation accordingly. This closed-loop control ensures that pressure settings remain stable and accurate by detecting actual system conditions and making real-time adjustments, compensating for any environmental variations.
3Ease of operation
If conventional mechanical pressure switches are used, then adjustments can be made manually, but technicians are exposed to high voltage during adjustments
Solution Approach 1:
The digital pressure switch replaces manual mechanical adjustments with electronic configuration through the controller. Pressure thresholds and parameters can be set and modified via digital interfaces without requiring technicians to physically access high-voltage components, eliminating electrical exposure risks while maintaining ease of operation.
Solution Approach 2:
The controller acts as an intermediary between the user and the high-voltage pump system. All adjustments and control actions are performed through the controller's digital interface, which safely manages electrical connections without exposing technicians to dangerous voltages. The relay system further mediates between low-voltage control signals and high-voltage pump operation.
4Reliability
If mechanical pressure switches are used, then the switching mechanism is simple, but rapid fluid pump cycling cannot be detected
Solution Approach 1:
The digital pressure switch uses continuous feedback from the pressure sensor to the controller, which monitors pressure changes over time. This enables detection of rapid pressure fluctuations that indicate short cycling, providing reliability information about pump operation without requiring complex additional hardware beyond the basic sensor-controller system.
Solution Approach 2:
The controller serves as an intermediary that processes pressure sensor data and detects patterns indicating short cycling. By analyzing the timing and magnitude of pressure changes, the controller can identify abnormal rapid cycling conditions and provide alerts or adjust operation, adding detection capability through intelligent data processing rather than complex mechanical mechanisms.
5Reliability
If air compressors run frequently to compensate for increasing leak rates, then system pressure is maintained, but the air compressor experiences premature failure
Solution Approach 1:
The digital pressure switch provides continuous feedback on system pressure and pump operation through the controller. By monitoring pressure trends and leak rates over time, the system can identify increasing leakage patterns and alert operators to potential issues before they cause compressor failure. This enables proactive maintenance while maintaining reliable pressure control.
Solution Approach 2:
The system performs preliminary detection and alerting of potential problems through the controller's monitoring capabilities. By detecting early signs of increased leak rates or abnormal operation patterns, the system can prompt preventive maintenance actions before they lead to compressor failure, extending equipment life while maintaining system reliability.
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 digital pressure switch provides precise control and monitoring, reduces fluid pump cycling, detects potential failures, and maintains system integrity by adjusting pump operation based on real-time data, thereby extending compressor life and ensuring compliance with fill time requirements.
Implementation Method 1
a pressure sensor configured to measure pressure inside a closed system
Implementation Method 2
an amperage sensor configured to measure an amperage draw of an electric motor of the fluid pump
Implementation Method 3
one or more relays configured to be connected to the fluid pump for activation and deactivation of the fluid pump
Data Source
AI summary
A digital pressure switch is configured to be connected to a fluid pump. The digital pressure switch includes a pressure sensor configured to measure pressure inside a closed system, one or more relays configured to be connected to the fluid pump for activation and deactivation of the fluid pump, an amperage sensor configured to measure an amperage draw of an electric motor of the fluid pump, and a controller configured to process data from the pressure sensor and/or data from the amperage sensor and to activate or deactivate the motor of the fluid pump based on the data from the pressure sensor and/or the data from the amperage sensor, using the relays.