Water temperature regulating valve
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Solution Overview
Problem
Existing water temperature regulating valves in hydronic heating systems face challenges in providing flexible temperature control and minimizing weight, while maintaining effective sealing and flow efficiency, often relying on heavy brass components and limited manufacturing technologies.
Innovation Solution
A fluid temperature regulating valve design featuring a shell-like insert with moulded thermoplastic elastomer (TPE) seal, which replaces brass internals, allowing for a lightweight, flexible, and efficient flow passage system within a simplified forged and machined valve body, enabling improved sealing and increased flow without additional components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If brass components are used for valve body and flow passages, then sealing effectiveness and durability are improved, but weight increases significantly
Solution Approach 1:
The valve is divided into two functional parts: a brass valve body providing sealing surfaces and inlet/outlet ports, and a separate plastic insert containing the flow passages. This segmentation allows each material to perform its optimal function - brass for sealing and plastic for lightweight flow management.
Solution Approach 2:
The invention combines two different materials (brass and plastic) into a composite valve structure. The brass valve body provides structural integrity and sealing surfaces, while the plastic insert provides lightweight flow passages with integrated sealing features through molded gland grooves.
2Manufacturing precision
If complex cast or machined channels are used within brass valve body, then flow control precision is improved, but manufacturing complexity and cost increase
Solution Approach 1:
The invention replaces complex mechanical casting and machining operations with a molding process for the insert. The flow passages are created through mold cavities rather than subtractive machining, simplifying manufacturing while maintaining precise flow control geometry.
Solution Approach 2:
The invention changes the manufacturing parameter from machining tolerances to mold cavity tolerances. The insert is molded with precise flow passage geometry directly formed by the mold, achieving the required flow control precision through the molding process rather than post-manufacturing machining.
3Reliability
If traditional sealing methods are used with brass components, then sealing reliability is improved, but device weight and material cost increase
Solution Approach 1:
The invention uses flexible sealing lips molded directly onto the plastic insert. These thin film sealing elements conform to the brass valve body sealing surfaces, providing reliable sealing without requiring heavy brass components throughout the entire valve structure.
Solution Approach 2:
The plastic insert acts as an intermediary between the brass valve body and the flow control mechanism. It provides a lightweight structure with integrated sealing features that interface with the brass body, mediating the connection while reducing overall weight compared to a solid brass construction.
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 solution reduces weight, enhances sealing, and allows for greater flexibility in temperature control and flow management, minimizing material costs and operational risks, while maintaining effective temperature regulation and preventing damage from increased temperature levels.
Implementation Method 1
an insert in a sealing relationship with an inner surface of the cavity, the insert maintaining a substantially static position with the inner surface of the cavity
Implementation Method 2
flow passages defined by the insert are arranged to interact with temperature reactive moveable closure means to selectively permit, restrict or prevent the flows of heated fluid and cooled fluid into the cavity
Data Source
Figure 1
Figure 2
Figure 3
AI summary
A water temperature regulating valve (10) including a valve body (12) having a cavity (13) in which mixing of fluids can occur, and provided with a hot fluid (or heated water) inlet (18) adapted for communication with a source of hot (or heated) water, a cooled fluid inlet (16) adapted for communication with an apparatus that has used the mixed fluid for heating, a mixed fluid outlet (14) adapted for communication with an apparatus that uses the mixed fluid for heating, and a return fluid outlet (20) adapted for communication with the source of hot (or heated) water, all inlets and outlets also being in communication with the cavity (13) provided within the valve body (12), said cavity (13) being provided with an insert (24) in a sealing relationship with an inner surface of the said cavity (13), said insert (24) having a central bore (42) and also defining flow passages and being configured to direct the flows of hot fluid entering the cavity (13) via the hot fluid inlet (18) and cooled fluid entering the cavity via the cooled fluid inlet (16), the flow passages defined by the said insert (24) interacting with moveable closure means to selectively permit, restrict or prevent the flows of hot fluid and cooled fluid into the cavity (13), and mixed fluid and return fluid out of the cavity (13), said moveable closure means being temperature-reactive and/or manually operable.