Scroll Compressor End Plate Exhaust Groove Design
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing scroll compressors with variable volume ratios face limitations in reducing over-compression due to the restricted position of pressure relief holes, leading to inefficiencies when the required system pressure is low.
Innovation Solution
The design includes an exhaust groove on the non-orbiting scroll end plate that extends outward from the pressure relief port, allowing communication with intermediate compression chambers closer to the outermost side, thereby reducing the pressure of discharged fluid and enhancing the range of variable volume ratios.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a pressure relief hole is provided in the non-orbiting scroll end plate, then the compressor can operate with variable volume ratio and reduce over-compression, but the position of the pressure relief hole is limited by the exhaust communication space, which restricts the range of variable volume ratio
Solution Approach 1:
The patent transitions from a two-dimensional planar arrangement to a three-dimensional configuration by adding an exhaust groove that extends in the axial direction. This allows the pressure relief port to communicate with intermediate compression chambers at different radial positions, effectively expanding the variable volume ratio range without increasing planar complexity.
Solution Approach 2:
The exhaust groove acts as an intermediary structure that connects the pressure relief port to intermediate compression chambers. This mediator enables fluid communication between chambers that would otherwise be inaccessible, allowing the pressure relief mechanism to function across a broader range of compression stages.
2Loss of energy
If the pressure relief hole is positioned to communicate with outermost intermediate compression chambers, then the discharged fluid pressure is reduced and over-compression is minimized, but the structural complexity of the end plate increases
Solution Approach 1:
The end plate structure is segmented into functional zones: the pressure relief port area, the exhaust groove region, and the central exhaust port area. This segmentation allows each component to perform its specific function independently, reducing overall structural complexity while achieving the goal of communicating with outermost compression chambers.
Solution Approach 2:
By utilizing the axial dimension through the exhaust groove, the design achieves communication with outermost compression chambers without requiring complex radial or circumferential arrangements in the end plate plane, thus minimizing structural complexity.
3Adaptability or versatility
If the exhaust groove extends outward from the pressure relief port, then communication with intermediate compression chambers closer to the outermost side is enabled, but the manufacturing complexity of the end plate increases
Solution Approach 1:
The exhaust groove is designed as a fluid passage that leverages pressure differentials and fluid flow dynamics to enable communication with compression chambers. The groove geometry is optimized for fluid flow rather than mechanical strength, simplifying manufacturing by focusing on hydraulic functionality rather than structural complexity.
Data Source
AI summary
Disclosed are a compression mechanism and a scroll compressor. The compression mechanism comprises an orbiting scroll and a non-orbiting scroll comprising a non-orbiting scroll end plate and forms a series of fluid chambers comprising an intermediate compression chamber. An exhaust communication space is provided on the second side of the non-orbiting scroll end plate, and the non-orbiting scroll end plate is provided with a pressure relief port which makes at least one intermediate compression chamber be in selective fluid communication with the exhaust communication space. An end plate surface on the first side of the non-orbiting scroll end plate is provided with an exhaust groove which is in communication with the pressure relief port, the pressure relief port can be in fluid communication with the at least one intermediate compression chamber through the exhaust groove.