Reed Valve Casing Recess for Foreign Matter Tolerance
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Solution Overview
Problem
Reed valves can malfunction due to accumulation of solid foreign matter in the gap between the reed and the casing, leading to failure in maintaining the closed state.
Innovation Solution
A reed valve design featuring a recessed surface on the casing that increases in depth towards the reed's end, allowing for a wider gap and guiding foreign matter away from the critical areas, combined with a solenoid unit for electromagnetic operation, which enhances the valve's resistance to foreign matter accumulation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the gap between the reed and casing is reduced to improve sealing, then the valve closed state is better maintained, but foreign matter accumulation becomes more likely causing malfunctions
Solution Approach 1:
The patent introduces a recess in the casing that creates a third spatial dimension for foreign matter storage. Instead of relying solely on the gap width between reed and casing, the design adds a depth dimension by forming a recess with a bottom surface, allowing foreign matter to be stored away from the critical sealing area while maintaining effective gap sealing.
Solution Approach 2:
The recess acts as an intermediary structure between the reed and the outer casing environment. It provides a dedicated space that mediates the interaction between foreign matter and the valve mechanism, preventing foreign matter from directly interfering with the reed-casing gap while still being part of the overall valve structure.
2Object-affected harmful factors
If the recess depth is increased to improve foreign matter storage, then foreign matter guidance is enhanced, but the structural complexity increases
Solution Approach 1:
The recess is not uniformly distributed throughout the casing but is strategically localized to specific areas where foreign matter accumulation would be most harmful. The recess is positioned to face the arm part of the reed, creating a localized foreign matter storage zone that precisely addresses the problem area without unnecessarily complicating the entire casing structure.
Solution Approach 2:
The casing structure is segmented by introducing the recess as a distinct feature within the otherwise simple casing body. This segmentation allows the casing to perform dual functions: maintaining its primary structural role while also providing a dedicated foreign matter storage compartment through the recess portion.
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 design effectively prevents foreign matter from causing malfunctions by increasing the gap size and guiding it away, ensuring reliable operation of the reed valve.
Implementation Method 1
an electromagnetic valve which uses electromagnetic force to keep the valve in the closed state
Implementation Method 2
an elastically deformable reed for opening and closing the valve hole
Data Source
AI summary
A reed valve 1 includes: a valve body 4; a valve seat 6 having a valve hole 3 for passage of a fluid J; a casing 8 accommodating the valve body 4; and a reed 10 including an arm part 18 having a first end portion 22 connected to the casing 8, and a valve body support part 20 connected to a second end portion 24 of the arm part 18 and supporting the valve body 4 so that the valve hole 3 can be opened and closed. When a first direction D1 is a flow direction of the fluid J in the valve hole 3, and a first surface 21 is a surface facing downstream in the first direction D1 among an inner surface of the casing 8, the first surface 21 includes a recess 27 facing the arm part 18.