Recessed Outer Fixed Scroll Wall for Compressor Fluid Flow
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Solution Overview
Problem
The existing scroll compressors face a challenge in fluid flow due to the limited space created by the protrusion of fastened portions, which can restrict the flow of fluid between the outer circumferential wall of the fixed scroll member and the fastened portion, potentially reducing the efficiency of fluid compression.
Innovation Solution
The design incorporates a housing with a first and second housing member, where the first housing member features thick and thin portions, and the second housing member includes recesses on the outer circumferential wall, allowing the fasteners to protrude inward, thereby reducing the compressor's size while maintaining efficient fluid flow through strategically positioned intake passages.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the fastened portion protrudes inward to reduce compressor size, then the overall dimensions are reduced, but the fluid flow between the outer circumferential wall and fastened portion becomes limited
Solution Approach 1:
The partition wall is designed with non-uniform thickness, featuring thick portions at fastened portions and thin portions at other areas. This local differentiation allows the fastened portions to protrude inward for size reduction while thin portions maintain adequate fluid flow passages, resolving the contradiction between compact size and fluid flow efficiency
Solution Approach 2:
The patent introduces axial dimension variations in the partition wall thickness rather than uniformly reducing all dimensions. By varying thickness along the axial direction (thick at fastening areas, thin at fluid flow areas), the design achieves size reduction in radial direction while preserving fluid flow characteristics in axial direction
2Volume of moving object
If the partition wall is made thinner to reduce size, then the compressor dimensions are reduced, but the structural rigidity decreases
Solution Approach 1:
The partition wall employs local thickness variation with thick portions strategically positioned at fastened portions to maintain structural rigidity and strength where needed, while thin portions are placed in areas where rigidity is less critical, thus achieving size reduction without compromising overall structural stability
Solution Approach 2:
The partition wall functions as a composite structure with varying thickness zones, combining thick rigid sections for structural support and thin sections for space optimization, creating a functionally graded structure that balances rigidity and compactness
Data Source
AI summary
A scroll compressor includes a housing and a compression mechanism accommodated in the housing. The housing includes a first housing member having an annular partition wall and a second housing member. The partition wall includes a fastened portion that is thicker than other portions in a circumferential direction of the partition wall. The compression mechanism includes a fixed scroll member and an orbiting scroll member. The fixed scroll member includes a fixed spiral wall extending spirally and an outer circumferential wall that surrounds the fixed spiral wall. The outer circumferential wall includes a recess forming portion having a recess recessed inward in the radial direction. The recess is located at a part of the outer circumferential wall opposed to the fastened portion in the radial direction.