Water Purification Filter Head Assembly Sealing and Flow Control
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Solution Overview
Problem
Existing water purification filter head assemblies require raw water to pass through the filter, lack operational control for direct water use, and suffer from complex structures, leakage issues, and unstable sealing due to loosely mounted seal members.
Innovation Solution
A head assembly with a rotatable rotation shaft and seal members that allows for direct water use without filtration and purified water use through filtration, featuring a bypass hole and guide holes for raw water flow control, and additional seal members for enhanced water-tightness, along with a fastening cap to limit rotation angles and prevent leakage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a switching valve device is added to enable direct water use, then water use flexibility is improved, but device complexity increases and manufacturing difficulty increases
Solution Approach 1:
The rotation shaft is segmented into multiple functional portions: a bypass hole for direct water flow, guide holes for filtered water flow, and sealing surfaces. This segmentation allows a single rotating component to replace multiple valve elements, achieving water use flexibility without proportionally increasing overall device complexity
Solution Approach 2:
The rotation shaft serves multiple functions simultaneously: it acts as a switching mechanism, a flow guide, a sealing surface, and a connection element. By making the rotation shaft multi-functional, the patent avoids adding separate components for each function, thereby improving versatility while controlling device complexity
2Ease of operation
If seal members are mounted on rotating portions, then operational flexibility is improved, but sealing reliability deteriorates due to loose mounting
Solution Approach 1:
The rotation shaft features locally optimized sealing structures with specific surface finishes and geometric shapes at the sealing portions. These localized quality enhancements ensure that seal members maintain reliable contact during rotation, preventing leakage while preserving operational flexibility
Solution Approach 2:
The sealing surfaces on the rotation shaft are pre-configured with precise geometries and surface treatments before assembly. This preliminary preparation ensures that when seal members are installed, they immediately achieve reliable sealing without requiring additional adjustment or tight fitting methods
3Ease of manufacture
If individual components are assembled with loose fit, then assembly ease is improved, but assembly precision deteriorates causing seal member displacement
Solution Approach 1:
The rotation shaft and head assembly incorporate asymmetric features such as keyed connections, eccentric positioning elements, and non-symmetric sealing surfaces. These asymmetric designs provide natural alignment during assembly, ensuring precise component positioning without requiring tight fitting or complex alignment procedures
Data Source
AI summary
Provided is a head assembly for a water purification filter, which includes a head body, a rotation shaft, and a fastening cap. In particular, the rotation shaft is rotated in the state of being placed on a seat protrusion formed on the head body, and a lower seal member is disposed in the portion where the rotation shaft is placed on the seat protrusion. Accordingly, there can be prevented a problem in which the lower seal member departs from a predetermined location during the coupling of the rotation shaft to the head body so that defective assembly occurs.