Swivel Ceramic Valve Temperature Limiting Device
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Solution Overview
Problem
Conventional faucet control valves lack temperature detecting and regulating functions, leading to the risk of scalding from hot water when its temperature is too high.
Innovation Solution
A swivel-type precision ceramics control valve with a temperature limiting device that includes a water dividing member, cap, support sleeve, temperature detector, water stop sleeve, and spring, which adjusts water flow to prevent excessive hot water from being dispensed by using a chemical substance with thermal expansion and contraction properties to control the flow of hot and cold water.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a conventional control valve is used, then the structure is simple and easy to manufacture, but it lacks temperature detecting and regulating functions causing scalding risk
Solution Approach 1:
The temperature detector is nested within the valve body structure, with the detecting element positioned inside the hot water passage. This allows the temperature detection function to be integrated into the existing valve architecture without requiring a completely separate system, thus improving safety while limiting structural complexity increase.
Solution Approach 2:
A temperature detector acts as an intermediary element between the hot water flow and the control mechanism. The detector monitors water temperature and triggers the control valve to adjust or stop hot water flow when unsafe temperatures are detected, providing safety regulation without direct user intervention.
2Adaptability or versatility
If the temperature limiting device is added, then temperature regulation function is achieved, but the device complexity increases
Solution Approach 1:
The control valve assembly is designed to perform multiple functions: normal water flow control, temperature monitoring, and automatic temperature regulation. By integrating the temperature detector and control mechanism into the existing valve structure, the system achieves multi-functionality without proportionally increasing complexity.
Solution Approach 2:
The temperature detection and control functions are merged with the water flow control mechanism. The temperature detector is positioned within the hot water passage, and the control valve uses the same actuating mechanism for both flow control and temperature regulation, combining multiple functions into a unified system.
3Extent of automation
If the chemical substance with thermal expansion properties is used, then automatic temperature response is achieved, but the manufacturing complexity increases
Solution Approach 1:
A chemical substance with thermal expansion properties is incorporated into the temperature detector. When the substance detects elevated water temperature, it expands and automatically triggers the control mechanism to adjust or stop hot water flow, achieving automatic temperature response without requiring external power sources or complex electronic controls.
Solution Approach 2:
The temperature detection and response system is designed to be self-activating. The chemical substance automatically responds to temperature changes through thermal expansion, triggering the control valve without requiring external sensors, power sources, or user intervention, thereby simplifying the manufacturing process despite the automated function.
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
Effectively regulates water temperature to prevent scalding by ensuring hot water is cooled or stopped when its temperature exceeds a safe limit, providing a safer user experience.
Implementation Method 1
The chemical substance has a thermal expansion and contraction feature due to a temperature change of an ambient environment. When the chemical substance is heated and expanded, the push rod is pushed outward from the opening of the temperature detector by the chemical substance, and when the chemical substance is cooled and contracted, the push rod is retracted into the opening of the temperature detector.
Data Source
AI summary
A precision ceramics control valve includes a valve housing, a rotary base mounted in the valve housing, a valve lever mounted on the rotary base and protruding upward from the valve housing, a movable valve plate mounted in the valve housing and located under the rotary base, a fixed valve plate mounted in the valve housing and located under the movable valve plate, a valve seat mounted on a lower end of the valve housing to stop the fixed valve plate, the movable valve plate and the rotary base, and a temperature limiting device mounted in the valve seat.