Gas Valve Position Detection via Magnetic Field Sensing
Solution Overview
Problem
Existing gas valve assemblies lack comprehensive monitoring and control capabilities, particularly in ensuring safe operation and efficient fluid flow management, which can lead to inefficiencies and safety concerns in gas-fired appliances.
Innovation Solution
A gas valve assembly with integrated sensors and a controller that monitors fluid flow, pressure, and valve positions, enabling real-time control and diagnostics, including position sensing, pressure monitoring, and communication with remote devices to ensure safe and efficient operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional gas valve assemblies are used without integrated sensors and controllers, then the device complexity is low, but the safety monitoring and control capabilities are insufficient
Solution Approach 1:
The patent combines multiple previously separate components (valve body, sensors, controllers, position indicators) into an integrated gas valve assembly. The position sensor is integrated within the valve body structure, and the controller is coupled to receive signals directly from the sensor and actuator, creating a unified system that provides comprehensive safety monitoring without requiring multiple separate devices.
Solution Approach 2:
The valve assembly is designed to perform multiple functions through a single integrated structure. The valve body not only controls gas flow but also houses the position sensor and provides structural support for the controller. The system simultaneously achieves flow regulation, position monitoring, and safety control, eliminating the need for separate dedicated components for each function.
2Reliability
If real-time monitoring and control systems are integrated into the gas valve assembly, then the safety and efficiency are enhanced, but the device complexity increases
Solution Approach 1:
The patent implements a feedback mechanism where the position sensor continuously monitors the valve sealing member position and sends signals to the controller. The controller processes this feedback information and can adjust the actuator to maintain proper valve positioning or trigger safety responses, creating a closed-loop control system that enhances safety through real-time monitoring and automatic response.
Solution Approach 2:
The integrated controller automatically processes sensor signals and controls the actuator without requiring external intervention. The system self-regulates valve positioning and safety monitoring, with the controller receiving position information from the sensor and autonomously determining when to activate safety shutdowns or adjust flow rates, reducing the need for external control systems.
3Reliability
If position sensors are fluidly isolated from the fluid path, then the reliability of position detection is improved, but the device complexity increases due to additional isolation components
Solution Approach 1:
The patent uses a magnetic field as an intermediary between the valve sealing member and the position sensor. The position indicator attached to the valve sealing member generates or modulates a magnetic field that the sensor detects without direct fluid contact. This magnetic coupling allows reliable position detection while maintaining fluid isolation, as the magnetic field can penetrate the valve body wall without requiring fluid pathways or direct mechanical connection between the sensor and moving parts.
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 safety and efficiency by providing real-time monitoring and control of gas flow, detecting potential issues such as overpressure, leaks, and valve position, thereby preventing accidents and optimizing appliance performance.
Implementation Method 1
a sensor element (e.g., a magnet or ferrous core) secured relative to the valve sealing member and a sensor (e.g., a magnetic field sensor) positioned outside of the interior of the valve body. The sensor may be configured to detect a position of the valve sealing member
Data Source
AI summary
This disclosure relates generally to valves, and more particularly, to gas valve assemblies. In one illustrative but non-limiting example, a valve assembly may include a valve body having an interior and an exterior, a valve or valve sealing member positioned in the valve body, a sensor element (e.g., a magnet and/or a ferrous core) secured relative to the valve sealing member and a sensor (e.g., a magnetic field sensor) positioned outside of the interior of the valve body. The valve sealing member may be movable between an opened position and a closed position, and the sense element may move with the valve sealing member. The sensor may be configured to detect a position of the valve sealing member and communicate that position to a valve controller.