Flow Control Valve With Multiple Non-Overlapping Orifices
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Solution Overview
Problem
Conventional flow control valves for mass flow controllers face challenges in achieving high flow rates while maintaining a compact size, as they become bulky when trying to increase aperture or orifice diameter, leading to increased pressure loss and size issues.
Innovation Solution
The design incorporates multiple inflow and outflow orifices on the valve seated surface, with non-overlapping configurations and concave grooves to reduce pressure loss and enhance flow rates, utilizing a valve seat and body member arrangement to facilitate high flow rates under low differential pressure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the aperture between the valve seated surface and the seating surface is lengthened to increase fluid flow, then the flow rate increases, but the actuator size and stroke width must be enlarged, making the flow control valve bulky
Solution Approach 1:
The patent divides the single flow path into multiple parallel flow paths by forming multiple inflow orifices and multiple outflow orifices on the valve seated surface. This segmentation allows the total flow rate to increase through multiple small orifices rather than requiring a single large aperture, thereby maintaining a compact valve size while achieving high flow rates.
2Productivity
If the diameter of the inflow orifice and outflow orifice is enlarged to increase fluid flow, then the flow rate increases, but the area of the valve seated surface becomes bigger, making the flow control valve bulky
Solution Approach 1:
Instead of using a single large orifice that would require a large valve seated surface area, the patent segments the flow into multiple smaller orifices. The sum of the cross-sectional areas of multiple small orifices can equal or exceed that of a single large orifice, while occupying less total surface area and maintaining a compact valve structure.
Solution Approach 2:
The patent utilizes the radial dimension of the valve seated surface by arranging multiple orifices in different radial positions and patterns. This dimensional arrangement allows efficient use of the available surface area, enabling high flow rates without requiring an excessively large valve body.
3Productivity
If multiple inflow orifices and outflow orifices are formed on the valve seated surface, then the flow rate increases in a compact arrangement, but the orifices must be configured to avoid overlapping, increasing design complexity
Solution Approach 1:
The patent employs asymmetric arrangements of orifices, such as positioning inflow orifices and outflow orifices in different radial directions or at different angular positions around the valve center. This asymmetric configuration naturally prevents overlapping between inflow and outflow orifices while optimizing flow paths, thereby managing design complexity.
Data Source
AI summary
A flow control valve is disclosed that includes a valve body member having a seating surface that is seated on a valve seated surface. Multiple inflow orifices and multiple outflow orifices may be formed on the valve seated surface or the seating surface, and may be formed so as not to overlap each other in a state in which the seating surface is seated on the valve seated surface. An inside inflow channel that is in communication with the inflow channel and the inflow orifice may be formed inside a member where the inflow orifices are formed and an inside outflow channel that is in communication with the outflow channel and the outflow orifice is formed inside a member where the outflow orifices are formed.