Electronic Faucet Flow Switch for Mechanical Valve Status Detection
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Solution Overview
Problem
Retrofitting existing mechanical faucets with electronic features is challenging due to difficulties in determining the activation status of the mechanical valve and controlling the electronic valve accordingly.
Innovation Solution
A flow switch with a body, shaft, magnet assembly, and sensor is used to detect the flow of water in the mechanical mixed water line, determining the activation status of the mechanical valve and controlling the electronic valve based on this information, ensuring that the electronic valve is not activated when the mechanical valve is active and vice versa.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a mechanical faucet is retrofitted with electronic features, then the functionality and user experience are enhanced, but the complexity of determining mechanical valve activation status and controlling electronic valve operation increases
Solution Approach 1:
The patent replaces complex mechanical sensing mechanisms with a magnetic field-based detection system. A magnet is attached to the mechanical valve stem, and a magnetic sensor (such as a Hall effect sensor) detects the magnet's position to determine valve activation status. This substitution simplifies the control system while maintaining reliability, directly addressing the contradiction by reducing mechanical complexity while preserving adaptability.
Solution Approach 2:
The patent introduces a magnetic field as an intermediary between the mechanical valve and the electronic control system. The magnet attached to the mechanical valve stem creates a magnetic field that the magnetic sensor detects, serving as a reliable intermediary signal that accurately indicates valve activation status without requiring direct mechanical coupling or complex electrical connections.
2Measurement precision
If a flow switch with magnet assembly and sensor is used to detect mechanical valve activation, then the precision of activation status determination is improved, but the device complexity increases
Solution Approach 1:
The patent extracts the essential function of valve activation detection from complex flow sensing mechanisms and isolates it to a simple magnetic field detection system. By attaching a magnet to the valve stem and using a magnetic sensor to detect its position, the system achieves high measurement precision while minimizing structural complexity, effectively separating the detection function from the overall faucet system.
Solution Approach 2:
The patent changes the detection parameter from mechanical position or flow rate to magnetic field strength or magnetic pole position. This parameter change enables precise detection of valve activation status through simple magnetic field measurements, achieving high measurement precision with minimal additional complexity since magnetic sensors are compact and require no complex mechanical linkages.
3Reliability
If the electronic valve is controlled based on mechanical valve activation status, then the operational reliability is improved, but the control system complexity increases
Solution Approach 1:
The patent implements a feedback control mechanism where the magnetic sensor continuously monitors the magnet's position on the mechanical valve stem and provides real-time activation status information to the control system. This feedback enables reliable coordination between mechanical and electronic valves, ensuring the electronic valve operates only when the mechanical valve is deactivated, thereby improving operational reliability through simple binary feedback logic.
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
This solution allows for seamless integration of electronic features into mechanical faucets by accurately determining the mechanical valve's activation status, preventing unintended activation of the electronic valve and enhancing the operational efficiency and user experience of electronic faucets.
Implementation Method 1
The magnet assembly includes a magnet having a magnetic field. The magnetic field has a magnitude and a direction.
Implementation Method 2
The sensor is operable to detect at least one of the magnitude and the direction of the magnetic field of the magnet
Data Source
AI summary
The present invention provides an electronic plumbing fixture fitting, such as an electronic faucet, that includes an electronic valve, a mechanical valve, and a flow switch. The flow switch is used to determine if the mechanical valve is activated. The determination whether the mechanical valve is activated can be used to control the electronic valve.