Multi-Way Valve Sealing Layout for More Thermal Flow Paths
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Solution Overview
Problem
Current multi-way valves for controlling heating and cooling fluid flow in vehicles have limitations in terms of the number of possible flow paths and sealing efficiency, leading to increased complexity and potential leaks.
Innovation Solution
A multi-way valve design featuring a valve housing with two cavities and rotors that rotate to create multiple flow paths, combined with advanced sealing systems using cam ramps and biasing assemblies to enhance engagement between rotors and seals, reducing leakage and complexity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a multi-way valve uses a single cavity design with multiple flow paths, then the number of flow paths increases, but sealing complexity and leakage risk increase significantly
Solution Approach 1:
The valve housing is divided into multiple separate cavities (first valve cavity, second valve cavity, third valve cavity) instead of using a single complex cavity. Each cavity handles specific flow paths independently, allowing seals to be positioned at cavity boundaries rather than within complex internal passages. This segmentation reduces sealing complexity while maintaining multiple flow paths.
Solution Approach 2:
A common cavity is introduced as an intermediary space that connects multiple valve cavities. The common cavity serves as a central hub where heated fluid from multiple sources mixes before distribution. This intermediary structure simplifies sealing by providing clear boundary definitions between controlled zones.
2Ease of manufacture
If traditional sealing methods are used in multi-way valves, then manufacturing is simpler, but leakage and sealing reliability deteriorate
Solution Approach 1:
Seals are pre-installed in seal grooves within the valve housing before final assembly. The housing includes specifically designed seal grooves that guide and position seals correctly during assembly. This preliminary preparation ensures proper seal installation and positioning, improving sealing reliability without complicating the manufacturing process.
Solution Approach 2:
Different sealing solutions are applied at different locations based on specific requirements. O-rings are used in certain seal grooves while other areas may use different sealing mechanisms. Each sealing location is optimized for its specific function, improving overall sealing reliability while maintaining manufacturing feasibility.
3Adaptability or versatility
If complex flow paths are designed to increase adaptability, then more thermal circuits can be controlled, but pressure drop increases
Solution Approach 1:
The flow path is segmented into distinct zones (heated fluid sources zone, common cavity zone, thermal circuits zone) with clear directional flow between them. Fluid flows sequentially through these zones rather than navigating complex tortuous paths. This segmented approach maintains lower pressure drop while enabling control of multiple thermal circuits through the multi-cavity structure.
4Reliability
If multiple seals are used to improve sealing reliability, then leakage reduces, but manufacturing cost and material usage increase
Solution Approach 1:
The valve is divided into multiple cavities with seals positioned at the boundaries between cavities rather than throughout the entire flow path. This segmentation strategy reduces the total number of seals needed while maintaining sealing reliability at all critical interfaces. Each seal handles a specific cavity boundary, optimizing material usage.
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 provides improved sealing and reduced pressure drop, increasing the number of flow paths while minimizing leaks and manufacturing costs by simplifying the flow path and using less material for seals.
Implementation Method 1
advanced sealing systems using cam ramps and biasing assemblies to enhance engagement between rotors and seals
Implementation Method 2
The first and second valve rotors cooperate to define a plurality of flow paths when the first and second valve rotors are rotated about the respective rotor axes to a plurality of different predetermined positions to control a flow of fluid through the valve housing
Data Source
AI summary
A multi-way valve adapted to control a flow of fluid to different thermal fluid circuits includes a valve housing, a valve flow controller, and sealing systems. The valve flow controller is arranged in the valve housing to control flow through the valve housing. Each scaling system is configured to seal between the valve housing and one of the valve rotors included in the valve flow controller.