Indirect Opposition Flow Paths in Multiport Valves
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Solution Overview
Problem
Existing multiport valve configurations in ICP spectrometry systems often result in direct opposition of fluid flow paths, leading to inefficient mixing and reproducibility issues during sample analysis, particularly at high dilution factors.
Innovation Solution
The design of valve assemblies with flow paths in substantially indirect opposition between a stator and a rotor, allowing for enhanced mixing of fluids such as diluents and samples, which are configured to connect to external loops, outputs, and vents, ensuring effective fluid distribution and mixing during analysis.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If direct opposition flow paths are used in multiport valve configurations, then the valve structure is simple, but mixing efficiency is poor and reproducibility is compromised
Solution Approach 1:
The patent inverts the conventional direct opposition flow path configuration by implementing indirect opposition flow paths where fluids meet at an interface between valve members rather than flowing directly against each other. This inversion resolves the contradiction by achieving superior mixing efficiency through the indirect meeting point while maintaining a manageable valve structure.
Solution Approach 2:
The patent transitions from a one-dimensional direct opposition flow path to a multi-dimensional indirect opposition configuration where flow paths extend from different ports through valve members and converge at an interface. This dimensional change enables improved mixing by allowing fluids to approach each other from multiple directions rather than a single direct path.
2Reliability
If conventional valve configurations are used, then the device is simple to operate, but stabilization times are inconsistent particularly at high dilution factors
Solution Approach 1:
The patent applies the inversion principle by reversing the conventional direct opposition flow arrangement to an indirect opposition configuration. This inversion creates more consistent fluid mixing patterns at the valve member interface, which directly improves the reproducibility of stabilization times during analysis, particularly for high dilution factors where consistent mixing is critical.
3Manufacturing precision
If indirect opposition flow paths are implemented, then mixing is enhanced and reproducibility is improved, but the valve assembly becomes more complex
Solution Approach 1:
The patent segments the valve assembly into distinct valve members (first valve member and second valve member) with defined flow paths for each. This segmentation allows the indirect opposition flow configuration to be implemented in a modular manner, where each valve member handles specific fluid paths that converge at an interface, thereby achieving enhanced mixing while keeping the overall structure manageable through clear functional division.
Data Source
AI summary
Valve assemblies are described that provide flow paths in substantially indirect opposition for fluids injected into the valve assemblies for mixing. A valve assembly includes a first valve member having ports configured to receive a first fluid and a second fluid. The valve assembly also includes a second valve member coupled adjacent to the first valve member. The valve assembly defines a first flow path for the first fluid and a second flow path for the second fluid. The first flow path extends from one of the ports of the first valve member toward an interface between the first valve member and the second valve member, and the second flow path extends from a channel defined by the second valve member toward the interface between the first valve member and the second valve member. The second flow path is in substantially indirect opposition to the first flow path.