Scroll Compressor Valve Assembly Guide Passage Design
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Solution Overview
Problem
Existing scroll compressors face issues with the exhaust valve assembly, including high-speed valve piece movement leading to shortened life and increased fluid flow resistance due to small valve hole cross-sectional areas and misalignment of valve holes with exhaust ports, resulting in instability and pressure drops, particularly in high-displacement compressors.
Innovation Solution
The introduction of a guide passage with a tapered design that transitions from a larger exhaust port to smaller valve holes, along with a guide member that includes aligned and non-aligned first and second ports, respectively, to reduce fluid resistance and prolong valve piece life by increasing the cross-sectional area and guiding fluid flow effectively.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the valve hole cross-sectional area is small, then the valve assembly structure is simple, but the valve piece moves at high speed which shortens its service life
Solution Approach 1:
A guide passage is introduced as an intermediary component between the exhaust port and the valve hole. This guide passage has a larger cross-sectional area than the valve hole, serving as a buffer that reduces the speed of the valve piece during opening and closing operations, thereby extending its service life without complicating the overall valve assembly structure
2Volume of moving object
If the valve hole cross-sectional area is small, then the valve assembly is compact, but the fluid flow resistance increases causing large pressure drops
Solution Approach 1:
The solution transitions from a single-dimension small valve hole to a multi-dimensional flow path structure. The guide passage is designed with a larger cross-sectional area and optimized length, creating a three-dimensional flow path that reduces fluid resistance and pressure drops while keeping the valve assembly compact
3Device complexity
If the valve holes are not aligned with the exhaust ports, then the valve assembly can be compactly arranged, but the fluid flow resistance increases leading to exhaust instability
Solution Approach 1:
The guide passage serves as a mediator that connects the exhaust port and the valve hole even when they are not aligned. It provides a smooth transition path for the fluid, reducing flow resistance and maintaining exhaust stability while allowing flexible arrangement of the valve assembly components
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 solution significantly reduces the opening degree and moving speed of the valve piece, prolongs its service life, and improves exhaust stability and efficiency by minimizing pressure drops and fluid resistance.
Implementation Method 1
the fluid flow resistance increases, which leads to a large pressure drop as the fluid flows through the valve assembly
Implementation Method 2
the fluid flow resistance increases, which leads to a large pressure drop as the fluid flows through the valve assembly
Data Source
Figure 1
Figure 2a~2b
Figure 3a~3b
AI summary
Provided is a scroll compressor, comprising a compression mechanism (CM) and a valve assembly (200), wherein the compression mechanism (CM) is provided with a vent (V), and the valve assembly (200) is used for selectively opening and closing the vent (V). The valve assembly (200) comprises a valve plate (220) and at least one valve piece (224), wherein the valve plate (220) comprises at least one valve orifice (222); and the valve piece (224) is configured to selectively open and close the valve orifice (222). The scroll compressor further comprises a guide passageway (L), wherein the guide passageway (L) is provided with a first port (LI) communicating with the valve orifice (222) and a second port (L2) communicating with the exhaust opening (V). The valve assembly and the compressor can significantly prolong the service life of the valve piece, and can provide good guidance for a fluid discharged from the compression mechanism, thereby significantly reducing the resistance of venting and the pressure drop in the fluid, and significantly improving the effect of venting.