Integrated Flow Path Switching Layout for Leak-Checked Fluid Circuits
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Solution Overview
Problem
Conventional fluid circuit systems require multiple switch valves, leading to increased size, weight, and complexity, which complicates manufacturing and can result in fluid leakage due to inaccurate joining, thereby deteriorating workability and efficiency.
Innovation Solution
A flow path switching device comprising a main body member with groove-shaped passages, a drive unit, and cover members that allows for compact configuration and easy detection of fluid leaks, improving manufacturing workability by using sealing portions and openings to facilitate leak inspection and rejoining.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple switch valves are arranged in a fluid circuit to realize passage configuration switching, then the passage switching capability is improved, but the device size, weight, and complexity increase
Solution Approach 1:
The patent merges multiple switch valves into a single integrated flow path switching device with a unified main body member containing multiple internal passages. This consolidation maintains the passage switching capability while reducing the number of separate components, thereby decreasing device complexity and improving manufacturability.
Solution Approach 2:
The patent implements nested passages within the main body member, where multiple passages are arranged concentrically or in overlapping configurations. This nesting approach allows multiple fluid paths to coexist within a compact structure, reducing overall device size while maintaining full switching functionality.
2Adaptability or versatility
If multiple switch valves are arranged in a fluid circuit to realize passage configuration switching, then the passage switching capability is improved, but the manufacturing workability deteriorates due to inaccurate joining
Solution Approach 1:
By combining multiple switch valve functions into a single monolithic main body member, the patent eliminates the need for joining multiple separate valve components. This integration ensures accurate passage formation without joining errors, significantly improving manufacturing workability while maintaining passage switching capability.
Solution Approach 2:
The patent segments the internal passages into distinct, independently controllable routes within the unified main body member. This segmentation allows each passage to be precisely formed during manufacturing without requiring complex joining operations, thereby improving ease of manufacture while enabling versatile passage switching.
3Adaptability or versatility
If multiple switch valves are arranged in a fluid circuit to realize passage configuration switching, then the passage switching capability is improved, but fluid leakage occurs due to inaccurate joining
Solution Approach 1:
The patent merges multiple switch valves into a single integrated main body member with internally formed passages. This eliminates external joining interfaces that are prone to leakage, ensuring reliable fluid sealing while maintaining the ability to switch between multiple passage configurations.
Solution Approach 2:
Instead of joining multiple separate valves externally (which creates leakage points), the patent inverts the approach by forming all passages internally within a single monolithic structure. This inversion eliminates joining interfaces and ensures reliable fluid sealing throughout the device.
Data Source
AI summary
A flow path switching device includes: a first passage portion; a second passage portion; a first cover member attached to the first passage portion; and a second cover member attached to the second passage portion. The first passage portion includes a first passage connected to a fluid circuit and having a groove shape. The second passage portion includes a second passage connected to the fluid circuit to communicate with the first passage at a plurality of places and having a groove shape. The first passage portion, the second passage portion, and a drive unit are stacked in this order. The first cover member includes: a sealing portion to seal an opened portion of the first passage; and an opening arranged along an outer edge of the opened portion of the first passage.