Scroll Compressor Bypass Holes Over-Compression Gradient
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Solution Overview
Problem
In shaft penetration scroll compressors, the different volume reduction gradients of compression chambers lead to over-compression loss in the chamber with a larger volume reduction gradient, reducing overall compression efficiency due to uniform cross-sectional areas of bypass holes.
Innovation Solution
The scroll compressor is designed with larger cross-sectional areas and greater numbers of bypass holes in the compression chamber with the larger volume reduction gradient to prevent over-compression, enhancing efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If uniform cross-sectional areas of bypass holes are provided in both compression chambers, then the structure is simple, but over-compression loss occurs in the chamber with larger volume reduction gradient, reducing compression efficiency
Solution Approach 1:
The patent applies local quality by making the cross-sectional area of bypass holes different for each compression chamber based on its specific volume reduction gradient. The first compression chamber (with larger volume reduction gradient) has larger bypass hole area, while the second compression chamber (with smaller volume reduction gradient) has smaller bypass hole area. This localized differentiation optimizes refrigerant bypass for each chamber's specific compression characteristics, preventing over-compression loss while maintaining reasonable structural complexity.
2Loss of energy
If the cross-sectional area of bypass holes is increased in the compression chamber with larger volume reduction gradient, then over-compression loss is minimized, but the device complexity increases
Solution Approach 1:
The patent applies parameter changes by varying the cross-sectional area parameter of bypass holes according to the volume reduction gradient of each compression chamber. Specifically, the first bypass holes in the first compression chamber have a larger cross-sectional area than the second bypass holes in the second compression chamber. This parameter differentiation directly addresses the different compression characteristics of each chamber, minimizing over-compression loss while the variation is limited to only two parameters, keeping the overall device complexity manageable.
Data Source
AI summary
A scroll compressor is provided. The scroll compressor may include a fixed scroll including a fixed wrap, and an orbiting scroll including an orbiting wrap coupled to the fixed wrap to form a pair of compression chambers. An entire cross-sectional area of bypass holes formed at a compression chamber with a larger volume reduction gradient between the compression chambers may be formed to be larger than an entire cross-sectional area of bypass holes formed at the other compression chamber to prevent over-compression at the compression chamber with the larger volume reduction gradient, thereby enhancing an entire efficiency of the compressor.