Rotatable Six-Port Valve for Seven Isolated Flow Paths
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Solution Overview
Problem
The challenge is to design a multiport valve that can operate in seven distinct flow configurations among three inlet and three outlet ports with specific flow path requirements, including male fittings, electrical connectors, and stringent space, flow rate, temperature, and leakage specifications, while maintaining separate flow paths without significant mixing.
Innovation Solution
A valve design featuring a rotatable stemshell with internal passages and channels that align specific inlet and outlet ports at various angular positions, allowing for seven different flow paths without intermixing fluid streams, and incorporating an actuator for precise positioning within a compact housing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a multiport valve is designed to provide seven distinct flow configurations among three inlet and three outlet ports, then the valve's adaptability and versatility are improved, but the device complexity increases significantly
Solution Approach 1:
The valve body is divided into multiple sealed chambers that define distinct flow paths. Each chamber can independently control fluid flow between specific port combinations, allowing seven different flow configurations without requiring a complex single-chamber design. This segmentation enables versatile flow control while maintaining manageable structural complexity.
Solution Approach 2:
The valve employs a movable closure element (such as a spool or plug) that can be positioned in seven distinct locations to achieve different flow configurations. This dynamic positioning mechanism allows a single valve body to provide multiple flow paths by changing the closure element's position, rather than requiring multiple fixed valves or complex internal passages.
2Reliability
If the valve is designed to maintain separate flow paths without significant mixing, then the purity of fluid streams is improved, but the manufacturing precision requirements increase
Solution Approach 1:
The valve body incorporates multiple sealed chambers that physically separate different fluid streams. Each chamber is designed to handle specific port combinations, ensuring that fluids flowing through different chambers remain isolated from each other. This chamber segmentation provides reliable flow path separation while allowing standard manufacturing tolerances for each individual chamber.
Solution Approach 2:
The closure element acts as an intermediary that selectively blocks or opens passages between chambers and ports. By using this intermediate component to control flow paths rather than relying solely on precise alignment of multiple ports, the design achieves reliable flow separation with more achievable manufacturing precision.
3Volume of moving object
If the valve is designed to fit within a compact space of 50 mm×165 mm×70 mm, then the volume of the valve is reduced, but the device complexity increases
Solution Approach 1:
The valve design nests the closure element within the valve body, with the closure element fitting inside the cylindrical valve housing. The closure element's diameter is less than the valve body's inner diameter, allowing it to move freely within the housing while maintaining a compact overall structure. This nesting arrangement achieves space efficiency without significantly increasing design complexity.
Solution Approach 2:
A single closure element performs multiple functions by being positioned in seven different locations, each position providing a specific flow configuration. This multi-functional approach allows one component to replace what would otherwise require multiple separate valves or complex internal passageways, reducing overall valve volume while maintaining manageable design complexity.
4Productivity
If the valve is designed to handle flow rates of 10 L/min-40 L/min with a minimum flow coefficient of 14/13, then the productivity is improved, but the port dimensions and valve size increase
Solution Approach 1:
The closure element is designed with varying cross-sectional areas at different positions along its length, allowing it to provide adequate flow capacity (CV≥13) when open while maintaining a compact valve size. The dynamic positioning of the closure element optimizes the open passage area for each flow configuration, enabling high productivity without requiring oversized ports or housing.
Data Source
AI summary
A multi-port valve provides three inlets and three outlets. In many embodiments, seven flow configurations are provided. A stemshell can rotate internal to a housing to direct fluid from specific inlets to specific outlets while saving flow through various inlet/outlet ports as required by the various flow configurations.