Scroll Expander Base Plate Bypass Valve Integration
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Solution Overview
Problem
Conventional scroll expanders have an increased length in the shaft direction due to an additional housing on the base plate of the fixed scroll, which complicates the integration of the valve mechanism, leading to size and length issues.
Innovation Solution
A scroll expander design where the suction port, bypass passage, and bypass valve are integrated into the base plate of the fixed scroll, eliminating the need for an additional housing and reducing the overall length by forming these components directly on the base plate.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If an additional housing is provided on the back surface of the base plate to dispose the valve mechanism and communication passage, then the valve mechanism can be properly integrated, but the length in the shaft direction of the scroll expander increases
Solution Approach 1:
The patent merges the base plate with the valve mechanism housing into a single integrated component. The base plate is designed to include the communication passage and valve mechanism attaching portion directly, eliminating the need for a separate additional housing. This integration maintains proper valve mechanism integration while reducing the overall length in the shaft direction by consolidating structures.
Solution Approach 2:
The base plate is designed to serve multiple functions: it provides structural support, forms the communication passage, and includes the attaching portion for the valve mechanism. By making the base plate multi-functional, the patent eliminates the need for separate components, thereby reducing the length in the shaft direction while maintaining all necessary functionalities.
2Device complexity
If an additional housing is provided on the back surface of the base plate, then the communication passage and valve mechanism can be properly disposed, but the overall size of the scroll expander increases
Solution Approach 1:
The patent combines the housing function with the base plate by integrating the communication passage and valve mechanism attaching portion directly into the base plate structure. This merging eliminates the need for an additional housing component, thereby reducing the overall volume and size of the scroll expander while maintaining proper integration of the communication passage.
3Length of stationary object
If the suction port, bypass passage, and bypass valve are formed in the base plate, then the length in the shaft direction is reduced, but the base plate structure becomes more complex
Solution Approach 1:
The base plate is designed as a multi-functional component that simultaneously provides structural support, forms the communication passage, and includes the valve mechanism attaching portion. By concentrating multiple functions in the base plate, the patent reduces the length in the shaft direction while the increased complexity is localized to a single component rather than requiring multiple separate parts.
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
This configuration allows for a compact design that reduces the length of the scroll expander in the shaft direction, enhancing its size and efficiency by integrating essential components without additional housing, thus improving its structural integrity and operational performance.
Implementation Method 1
the movable scroll is configured to be driven by expansion of working fluid in the expansion chamber
Data Source
AI summary
Scroll expander including a bypass passage and a bypass valve configured to open and close the bypass passage without significantly increasing the length in the shaft direction of the scroll expander. Scroll expander 23 includes suction port 513 which allows a high-pressure flow of a working fluid to enter and guides the entering flow of the working fluid into an expansion chamber. Discharge port 523 allows the working fluid expanded to a lower pressure in the expansion chamber to flow out. Bypass passage 27 communicates suction port 513 with the discharge port 523 while bypassing the expansion chamber. Bypass valve 28 is configured to open and close bypass passage 27. Suction port 513, bypass passage 27 and a bypass valve attaching portion 514 for attaching the bypass valve 28 are formed in a base plate of the fixed scroll 51.