Ceramic Disc Valve Cartridge for Low-Torque Water Mixing
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Solution Overview
Problem
Valve cartridges used in mixing hot and cold water systems face challenges in ensuring longevity and easy rotation, which affects the ease of operation and longevity of the components.
Innovation Solution
The use of ceramic discs in the valve cartridge design, including a main flow control disc and auxiliary discs, reduces the torque required to rotate the control stem, enhancing longevity and operational ease by selectively aligning hot and cold water openings with ports, thereby facilitating the mixing of water streams.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional sealing components are used in the valve cartridge, then proper sealing can be achieved, but the torque required to rotate the control stem increases and longevity decreases
Solution Approach 1:
The patent changes the material parameter from traditional sealing materials to ceramic material, which fundamentally alters the friction and wear characteristics. The ceramic discs provide both sealing and low-friction rotational surfaces, simultaneously achieving proper sealing while reducing the torque required to rotate the control stem.
2Reliability
If multiple sealing surfaces are added to ensure proper sealing, then sealing reliability improves, but device complexity increases
Solution Approach 1:
The patent merges the sealing function and the rotational bearing function into a single ceramic disc component. The ceramic disc serves dual purposes: it provides sealing against the valve body ports and simultaneously acts as a low-friction rotational surface for the control stem, eliminating the need for separate sealing components.
Solution Approach 2:
The ceramic disc is designed as a multi-functional component that performs multiple roles: sealing against the hot and cold water ports, providing a rotational bearing surface for the control stem, and controlling water flow through its opening. This universal component approach reduces overall device complexity while maintaining sealing reliability.
3Ease of operation
If the valve cartridge is designed for easy rotation, then operational ease improves, but sealing reliability may deteriorate
Solution Approach 1:
The patent changes the material parameter to ceramic, which has inherently low friction and high wear resistance properties. This material parameter change enables easy rotation while simultaneously providing reliable sealing, as the ceramic surface maintains consistent contact and sealing pressure during rotation without degrading.
Data Source
AI summary
A valve cartridge includes a valve body that defines a hot water port that has a first end and a second end. The valve body includes a cold water port that has a first end and a second end. The valve cartridge includes a rotatable control stem that is disposed at least partially within the valve body. The valve body includes a main flow control disc that is coupled to the control stem. The main flow control disc has a cold water opening and a hot water opening. The valve cartridge includes a first auxiliary disc positioned between the first end of the hot water port and the main flow control disc and a second auxiliary disc positioned between the first end of the cold water port and the main flow control disc.