Swivel Precision Ceramic Valve Temperature Limiting Mechanism
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Solution Overview
Problem
Conventional faucet control valves lack temperature detecting and regulating functions, leading to the risk of scalding from excessively hot water.
Innovation Solution
A swivel-type precision ceramics control balance 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 hot water from flowing when it exceeds a safe temperature, ensuring the water output is at a moderate temperature.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a conventional control valve is used without temperature detecting function, then the device complexity is low and ease of manufacture is high, but the safety is poor and scalding risk increases
Solution Approach 1:
A temperature detector is introduced as an intermediary component between the hot water flow and the valve control mechanism. The detector monitors water temperature and triggers the limiting device to close the hot water passage when excessive temperature is detected, thereby preventing scalding without requiring direct user interaction or complex electronic controls
Solution Approach 2:
The temperature limiting device operates autonomously based on temperature detection. When the chemical substance detects excessive hot water temperature, it automatically activates the water stop sleeve to close the hot water passage, eliminating the need for external control systems or user intervention while maintaining safety
2Reliability
If a temperature limiting device is added to detect and regulate water temperature, then the safety improves and scalding is prevented, but the device complexity increases
Solution Approach 1:
The patent utilizes parameter changes in the chemical substance's physical state in response to temperature changes. When the water temperature exceeds a predetermined threshold, the chemical substance undergoes a phase or state change that mechanically actuates the water stop sleeve, providing automatic temperature-based control without electronic components
Solution Approach 2:
The chemical substance in the temperature detector responds to thermal expansion or contraction based on water temperature. This thermal response mechanism directly actuates the push rod and water stop sleeve to close the hot water passage when excessive temperature is detected, providing a simple thermal-to-mechanical conversion system
3Measurement precision
If the movable valve plate completely blocks the cold water channel to stop cold water flow, then the temperature control precision improves, but the fluid flow control flexibility deteriorates
Solution Approach 1:
The valve plate is designed with differentiated local functions: a first valve plate portion that can block the cold water channel to precisely control temperature by preventing cold water mixing, and a second valve plate portion that independently controls the hot water channel to maintain flow flexibility. This localized functional differentiation allows simultaneous achievement of temperature precision and flow control
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 prevents scalding by regulating the temperature of the water output, ensuring it remains safe for users, even when the handle is operated by children or in cases of excessive hot water flow.
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 balance 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, a temperature limiting device mounted in the valve seat, a pedestal connected with the valve seat, and a balance unit mounted in the pedestal.