Dual-Passage Sensing Faucet Assembly for Solenoid Valve Failure
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Solution Overview
Problem
Sensing faucets face performance issues when a solenoid valve breaks down, leading to operational failures and reduced functionality.
Innovation Solution
The sensing faucet assembly incorporates a second water passage and a valve core that allows water to be supplied through this passage when the primary water passage is compromised, ensuring continuous operation by routing water from the input water control unit to the faucet body.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Extent of automation
If a solenoid valve is used to control the first water passage, then the faucet can operate automatically through sensing, but the system becomes vulnerable to failure when the solenoid valve breaks down
Solution Approach 1:
The water passage is divided into two separate passages: a first water passage controlled by the solenoid valve for automatic sensing operation, and a second water passage that can serve as a backup route. This segmentation allows the system to maintain functionality through the second passage when the first passage fails.
Solution Approach 2:
A backup second water passage is provided in advance before the solenoid valve fails. This redundant passage ensures that water can still be supplied to the faucet body even when the primary automatic control system fails, cushioning against the potential harm of complete system failure.
2Device complexity
If only a single water passage with solenoid valve is provided, then the device structure remains simple, but the faucet cannot operate normally when the solenoid valve breaks down
Solution Approach 1:
The water supply system is segmented into two independent passages with different control mechanisms. The first passage uses a solenoid valve for automatic control, while the second passage uses a manually controllable valve core, providing structural diversity that enhances reliability without excessive complexity.
Solution Approach 2:
The control mode of the water passage is changed from purely automatic (solenoid valve) to include manual control capability (valve core). This parameter change in control methodology allows users to manually operate the second passage when automatic control fails, improving reliability.
3Reliability
If a second water passage with valve core is added, then the faucet can continue to work when the first water passage fails, but the device complexity increases
Solution Approach 1:
The second water passage with valve core serves multiple functions: it acts as a backup supply route when the first passage fails, and it provides manual control capability independent of the automatic sensing system. This multi-functionality justifies the added structural complexity by providing both reliability and operational flexibility.
Data Source
AI summary
A sensing faucet assembly includes a faucet body, an input water control unit, a control box, and a sensor. The faucet body includes a faucet water passage. The control box includes a first water passage and a second water passage. The input water control unit includes a water inlet, a first water outlet, and a second water outlet. The first water passage communicates with the faucet water passage and the first water outlet, and the control box is equipped with a solenoid valve. The second water passage communicates with the faucet water passage and the second water outlet, and the input water control unit is provided with a valve core for controlling the communication and the blocking of the second water outlet.