Scroll Compressor Cooling Fins with Central Height Variation
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Solution Overview
Problem
Scroll compressors face challenges in effectively cooling the central portion, where the temperature rises due to compression, leading to potential thermal expansion issues that can hinder the orbiting motion of the scrolls.
Innovation Solution
The design features taller cooling fins in the central portion of both the fixed and orbiting scrolls, with a stepwise or continuous height increase towards the center, enhancing the heat-transfer area and cooling power, while maintaining a flat front end alignment to avoid unnecessary space occupation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If uniform cooling fins are provided across the scroll surface, then manufacturing is simple, but the central portion cannot be cooled effectively due to high compression temperatures
Solution Approach 1:
The cooling fins are configured with varying heights according to the radial position, with central fins being taller than outer fins. This local differentiation addresses the higher temperature conditions in the central compression region while maintaining a relatively simple overall structure that is easy to manufacture.
2Temperature
If taller cooling fins are provided in the central portion, then cooling effectiveness improves, but the structure becomes more complex
Solution Approach 1:
The cooling fin structure implements local quality by making central fins taller than outer fins. This targeted approach enhances cooling where it is most needed (central compression region) while keeping the overall structure relatively simple and avoiding unnecessary complexity throughout the entire scroll.
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 configuration effectively cools the central portion of the scrolls, suppressing thermal expansion and maintaining smooth operation by increasing the cooling capacity and preventing unnecessary space usage.
Implementation Method 1
a large number of cooling fins are provided on the back of each of an end plate of a fixed scroll and an end plate of an orbiting scroll to dissipate heat of compression with the compression of fluid and frictional heat with rotations of components
Implementation Method 2
air cooling via cooling fins is employed in oil-free scroll compressors
Data Source
Figure 1
Figure 2
Figure 3A~3B
AI summary
Provided is a scroll compressor in which a fixed scroll and an orbiting scroll can be cooled effectively through cooling fins. This scroll compressor (1) is provided with a fixed scroll (20), an orbiting scroll (30) which revolves around the fixed scroll (20) and combines to form a compression space for compressing a fluid between itself and the fixed scroll (20), and cooling fins (24) disposed on the back surface of the fixed scroll (20) and cooling fins (34) disposed on the back surface of the orbiting scroll (30). The backs of the cooling fins (24) and the cooling fins (34) in the central area are higher than in the periphery.