Inductive Pull-Out Faucet Switching Without Mechanical Contacts
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Solution Overview
Problem
Conventional electronic pull-out faucets rely on mechanical contact switches, which are complex, prone to assembly precision issues, and susceptible to corrosion and water vapor intrusion, making them inconvenient and unreliable.
Innovation Solution
An inductive pull-out faucet with a switch assembly comprising a metal component and an induction coil, generating an alternating magnetic field to control the water outlet channel, eliminating sliding contacts and allowing operation in harsh conditions with low power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If mechanical contact switches are used in electronic pull-out faucets, then water control function is achieved, but the structure becomes complex and assembly precision requirements increase
Solution Approach 1:
The patent replaces mechanical contact switches with an inductive switching mechanism. The pull-out hose itself acts as an inductor that, when pulled, changes the magnetic field and triggers the electronic valve through electromagnetic induction, eliminating complex mechanical contacts and sliding switches while maintaining water control functionality.
Solution Approach 2:
The pull-out hose serves dual functions: it is both the water delivery component and the switching trigger. By integrating the hose into the switching mechanism, the patent eliminates the need for separate mechanical switches, reducing overall device complexity while preserving ease of operation.
2Ease of operation
If mechanical contact switches are used, then water control is achieved, but the switch is susceptible to corrosion and water vapor intrusion
Solution Approach 1:
The patent eliminates mechanical contact switches that are prone to corrosion by using electromagnetic induction. The inductive switching mechanism has no exposed mechanical contacts, making it inherently resistant to water vapor and corrosion, thereby improving reliability in wet environments while maintaining water control functionality.
3Ease of operation
If mechanical contact switches are used, then water control is achieved, but assembly precision requirements are high and the switch is easy to be triggered erroneously
Solution Approach 1:
The patent replaces precision-critical mechanical contact switches with an inductive sensing system. The pull-out hose's movement naturally generates sufficient magnetic field change to trigger the switch, eliminating the need for precise mechanical alignment and reducing assembly precision requirements while preventing erroneous triggering.
4Ease of operation
If mechanical contact switches are used, then water control is achieved, but the structure prevents effective sealing and isolation from water vapor
Solution Approach 1:
The patent replaces mechanical contact switches with an inductive switching mechanism that can be fully sealed within the faucet body. Since the pull-out hose moves externally and triggers the switch through magnetic field interaction, the switching mechanism itself can be hermetically sealed, effectively isolating it from water vapor and preventing corrosion.
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 inductive solution provides a reliable, low-maintenance, and dust-resistant operation, ensuring consistent water control without mechanical contact issues, suitable for various environments.
Implementation Method 1
During a pulling process of the pull-out hose, the metal component is close to or away from the induction coil component to generate an alternating magnetic field
Data Source
AI summary
An inductive pull-out faucet includes a faucet body defining a pulling channel, a pull-out hose movably disposed in the pull-out channel and defining a water outlet channel, a pulling head connected with a water outlet end of the pulling hose, a control valve configured to control opening and closing of the water outlet channel, and a switch assembly electrically connected with the control valve. The switch assembly includes a metal component connected with one of the faucet body and the pull-out hose and an induction coil component connected with the other one of the faucet body and the pull-out hose. During a pulling process, when an attenuation value or an inductance value of an alternating magnetic field generated by approaching or moving away of the metal component from the induction coil component reaches a respective predetermined value, the control valve controls the water outlet channel to open or close.