Scroll Compressor Spiral Wall Thickness Optimization
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Solution Overview
Problem
Scroll compressors experience significant vibration due to changes in compressing force during the discharge of refrigerant, which existing technologies do not adequately address.
Innovation Solution
The scroll compressor design incorporates a varying wall thickness in the fixed and orbiting spiral walls, optimizing the formation point distance and orbiting angles to minimize the compressing force changes, thereby reducing vibration and noise.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the wall thickness of the spiral walls is increased to withstand high pressure before compression, then the durability is improved, but the vibration generated after compression is not reduced
Solution Approach 1:
The patent applies local quality by differentiating the wall thickness of the spiral walls at different locations. The first portion (near the center) has increased wall thickness to withstand high pressure, while the second portion (outer region) has optimized wall thickness to reduce vibration. This localized differentiation allows each region to serve its specific function optimally without compromising the other.
Solution Approach 2:
The patent introduces a correction coefficient that dynamically adjusts the wall thickness based on the orbital position and pressure conditions. The wall thickness varies along the spiral path, creating a dynamic structural response that adapts to the changing compression forces throughout the compression cycle, thereby reducing vibration while maintaining durability.
2Productivity
If the formation point distance is minimized to optimize compression efficiency, then the compression performance is improved, but the compressing force changes sharply causing vibration
Solution Approach 1:
The patent changes the geometric parameters of the spiral walls by introducing a correction coefficient that modifies the formation point distance. This parameter adjustment optimizes the compression efficiency while smoothing out sharp changes in compressing force, thereby reducing vibration without sacrificing productivity.
Solution Approach 2:
The patent applies periodic action by optimizing the spiral wall geometry to create a more uniform periodic compression pattern. The correction coefficient ensures that the formation point distance varies in a controlled periodic manner, reducing abrupt force changes and associated vibrations while maintaining compression efficiency.
Data Source
AI summary
A scroll compressor is provided. An orbiting angle of the orbiting scroll when the compression chamber is formed and compression of fluid is initiated is referred to as an orbiting initiation angle. An orbiting angle of the orbiting scroll when the compression of the fluid is completed is referred to as an orbiting termination angle. An orbiting angle of the orbiting scroll when an end of the orbiting spiral wall initiates contact with the arcuate portion of the fixed spiral wall before compression is completed is referred to as a distal end contact initiation angle. The formation point distance reaches a minimum value at least at one of a first orbiting angle or a second orbiting angle.