Pull-Out Sensor Faucet Water Switching Despite Magnet Position Drift
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Solution Overview
Problem
Existing induction type pulling faucets face issues with erroneous water control due to thermal expansion and cold shrinkage, causing a change in the relative position between strong magnets and sensors, leading to incorrect operation when a heavy vertical block is used to pull and press the shower head.
Innovation Solution
Incorporating an infrared sensor and a magnetic sensor connected via an electric wire to an induction control valve, with a strong magnet in the pulling shower head, to induce and control the water path switch by identifying changes in the magnetic field and position, ensuring accurate water outlet control.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a strong magnet and sensor are mounted cooperatively to achieve induction and water discharge, then induction control is achieved, but thermal expansion and cold shrinkage cause change in relative position between magnet and sensor leading to erroneous action
Solution Approach 1:
The patent applies the dynamics principle by making the pulling tube flexible rather than rigid. The pulling tube can dynamically adjust its length and position in response to thermal expansion and cold shrinkage, maintaining the correct relative position between the magnet and sensor despite temperature changes. This flexible design allows the system to adapt to environmental conditions while preserving induction control accuracy.
2Ease of operation
If a heavy vertical block is used to pull and press the shower head, then the shower head can be positioned, but the pulling tube passively becomes longer causing position error
Solution Approach 1:
The pulling tube is designed as a flexible, dynamic component that can elongate and contract in response to the heavy vertical block's movement. This dynamic flexibility allows the tube to accommodate the positioning force without creating permanent deformation or position errors, maintaining precision while enabling easy operation.
Solution Approach 2:
The system incorporates a pre-designed flexible section in the pulling tube that acts as a cushioning zone. This flexible section is positioned to absorb the mechanical stress and elongation caused by the heavy vertical block, preventing the stress from transmitting to the critical magnet-sensor alignment area and thus protecting the positioning precision.
3Adaptability or versatility
If dual-use induction and control is implemented on the same pulling faucet, then water path switch control is achieved, but the system becomes more complex
Solution Approach 1:
The patent merges the induction function and control function into a single integrated system. The magnet and sensor are combined in one assembly, and the pulling tube serves both as a mechanical connector and as part of the induction control mechanism. This merging reduces overall system complexity while achieving dual functionality.
Solution Approach 2:
The pulling tube is designed to serve multiple functions simultaneously: it provides mechanical connection, enables shower head positioning, and participates in the induction control system by housing or positioning the magnet. This multi-functionality reduces the need for separate components, thereby reducing overall system complexity while increasing adaptability.
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 enhances the convenience and accuracy of water path control in the induction type pulling faucet, preventing erroneous actions and improving user satisfaction by maintaining consistent operation despite temperature changes and heavy usage.
Implementation Method 1
a magnetic sensor is arranged to induce and identify the change in a magnetic field between moving distances of a pulling tube and a pulling shower head
Implementation Method 2
An infrared sensor and a magnetic sensor are mounted in the faucet body
Data Source
AI summary
The present invention relates to technical field of faucet, specifically to an induction type pulling faucet, including a faucet body, a valve core, a handle, and a pulling shower head. A water inlet tube, a pulling tube, and an induction control valve are mounted in the faucet body. The pulling tube is connected to pulling shower head and valve core respectively. The valve core is connected to water inlet tube and the handle respectively. An infrared sensor and a magnetic sensor are mounted in faucet body, which are both electrically connected to the induction control valve via electric wire. A strong magnet is mounted in the pulling shower head. The present invention identifies magnetic field changes between the pulling tube and the pulling shower head by setting magnetic sensor to achieve induction control of water path switch, and increase convenience of using the induction type pulling faucet.