Scroll Compressor Valve Assembly Bypass Design
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Solution Overview
Problem
The existing capacity varying apparatus in scroll compressors is complex, requiring many components, is difficult to lift due to increased weight, and has limited design freedom, leading to inefficiencies and increased costs, particularly due to the need for additional terminals and restricted use of standardized components.
Innovation Solution
A scroll compressor design that incorporates a high/low pressure dividing plate with bypass holes and check valves, where the control valve is positioned outside the casing, allowing for simplified operation and reduced component count, using standardized components and eliminating the need for additional power terminals.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a complex capacity varying apparatus with multiple components is used, then the compressor can achieve capacity variation, but the device complexity increases and fabrication costs increase
Solution Approach 1:
The patent combines the capacity variation function with the existing high/low pressure dividing plate structure. The dividing plate integrates multiple functions: it separates pressure zones, provides mounting surfaces for valves, and incorporates bypass holes directly into its structure. This merging eliminates the need for separate capacity variation components, reducing device complexity while maintaining adaptability.
Solution Approach 2:
The high/low pressure dividing plate is designed as a multi-functional component that simultaneously performs pressure separation, structural support, and capacity control functions. By making the dividing plate universal for multiple purposes, the patent eliminates the need for dedicated capacity variation apparatus, thereby reducing component count and fabrication costs while preserving capacity variation capability.
2Extent of automation
If additional power terminals and specialized components are added, then the capacity varying apparatus can be controlled, but fabrication costs increase and design freedom is limited
Solution Approach 1:
The patent employs passive check valves that automatically open or close based on pressure differential without requiring external power or control systems. The valves self-regulate refrigerant flow through pressure-driven mechanical action, eliminating the need for powered actuators, control wires, or additional terminals. This self-service mechanism reduces fabrication costs and simplifies manufacturing while maintaining effective capacity control.
3Stability of the object's composition
If the capacity varying apparatus is positioned inside the casing, then it can be integrated, but the design freedom is restricted and standardized components cannot be used
Solution Approach 1:
The patent segments the capacity variation system into modular components: check valves, bypass holes, and the high/low pressure dividing plate. These segmented elements can be independently selected, designed, and assembled. The dividing plate with integrated bypass holes and mounted valves creates a modular assembly that maintains integration benefits while allowing design flexibility and potential use of standardized valve components.
4Reliability
If a non-standardized capacity varying apparatus is used, then it can be customized for specific functions, but the number of assembly processes increases
Solution Approach 1:
The patent merges the capacity variation functionality directly into the high/low pressure dividing plate through integrated bypass holes and mounted check valves. This integration creates a single assembled unit rather than separate systems requiring multiple connection points. The combining of functions into one structural element reduces the number of assembly operations needed while maintaining reliable capacity variation functionality.
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 design enhances responsiveness, reduces fabrication costs, and prevents efficiency degradation from over-compression by simplifying the capacity varying apparatus and allowing for faster mode switching, while using standardized components and reducing the number of assembly processes.
Implementation Method 1
a check valve to open and close the bypass hole according to a pressure difference
Data Source
AI summary
A scroll compressor according to the present invention includes a casing, an orbiting member provided within the casing and performing an orbiting motion, a non-orbiting member forming a compression chamber together with the orbiting member, the compression chamber having a suction chamber, an intermediate pressure chamber and a discharge chamber, a communication passage configured to bypass a refrigerant of the compression chamber into the casing, an opening/closing valve assembly configured to open and close the communication passage, and a switching valve assembly configured to operate the opening/closing valve assembly, the switching valve assembly being provided outside the casing and connected to the opening/closing valve assembly, whereby an installation of the bypass hole can result in prevention of over-compression and an installation of a control valve for varying a capacity outside the casing can result in reduction of costs for the control valve.