Variable Volume Ratio Port in Orbiting Scroll Compressor
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Solution Overview
Problem
The complexity of assembly processes in scroll compressors with multiple valve assemblies complicates the manufacturing and operation of compressors with variable volume ratios, leading to increased costs and potential inefficiencies.
Innovation Solution
A compressor design featuring a first and second scroll member with variable volume ratio ports and a drive shaft, where a variable volume ratio valve is integrated within the drive hub, allowing for a simplified assembly and operation by defining a flow path between the compression pockets and discharge ports, and optionally including a monolithic valve housing with an anti-wear coating for improved performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple valve assemblies are used to control compressor discharge conditions, then the compressor can achieve variable volume ratios and improved performance, but the assembly process becomes complex and manufacturing costs increase
Solution Approach 1:
The patent combines multiple valve assemblies into a single integrated valve structure that is directly mounted on the discharge port. This unified valve assembly integrates the functions of multiple separate valves while maintaining the variable volume ratio capability, thereby reducing assembly complexity and manufacturing costs
Solution Approach 2:
The integrated valve assembly performs multiple functions simultaneously - it controls discharge conditions, enables variable volume ratios, and manages compression pockets through a single structural unit. This multi-functional design eliminates the need for separate valve assemblies while achieving the same performance benefits
2Adaptability or versatility
If multiple valve assemblies are used to control compressor discharge conditions, then the compressor can achieve variable volume ratios, but the number of parts increases leading to higher manufacturing costs
Solution Approach 1:
The patent merges multiple separate valve assemblies into one integrated valve structure that is directly mounted on the discharge port. This consolidation reduces the total number of parts that need to be manufactured, inventoried, and assembled, thereby lowering manufacturing costs while preserving the variable volume ratio functionality
3Reliability
If a complex valve assembly structure is used, then the compressor can control discharge conditions with multiple valves, but the assembly process becomes more difficult and time-consuming
Solution Approach 1:
The integrated valve assembly consolidates multiple valve functions into a single unit that can be installed as one component rather than assembling multiple separate valves. This reduces the number of assembly steps and fasteners required, significantly decreasing assembly time while maintaining precise discharge control through the unified valve design
Data Source
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AI summary
A compressor may include a first scroll member, a second scroll member and a drive shaft. The first scroll member may include a first end plate defining a first discharge port and a first spiral wrap extending from the first end plate. The second scroll member may include a second end plate defining a first variable volume ratio port and a second spiral wrap extending from the second end plate and meshingly engaged with the first spiral wrap and forming compression pockets. The variable volume ratio port may be located radially outward relative to the first discharge port and in communication with a first compression pocket. The drive shaft may be engaged with the second scroll member and driving orbital displacement of the second scroll member relative to the first scroll member.