Scroll Compressor Flow-Guiding Passage Reduces Pressure Loss
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Solution Overview
Problem
Conventional scroll compressors experience pressure loss and reduced refrigeration efficiency due to turbulence and vortex formation when refrigerant enters the suction cavity, leading to a decrease in enthalpy difference.
Innovation Solution
A non-orbiting scroll with a flow-guiding passage and ventilation openings is designed, featuring a streamlined passage with different curvature sections and a recessed portion to reduce turbulence, along with a filleted corner at the air inlet to prevent vortex formation, optimizing the refrigerant flow and reducing pressure loss.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If refrigerant enters the suction cavity through the air inlet in conventional scroll compressors, then the compression mechanism can be simple, but turbulence and vortex are produced causing pressure loss and reduced refrigeration efficiency
Solution Approach 1:
A flow-guiding passage is introduced as an intermediary component between the air inlet and the suction cavity. This passage includes a flow-guiding wrap section with specifically designed curvature that mediates the refrigerant flow, guiding it smoothly into the suction cavity while preventing turbulence and vortex formation, thus reducing pressure loss without complicating the overall compression mechanism
Solution Approach 2:
The flow-guiding wrap section employs curved surfaces with specific curvature radii to guide the refrigerant flow. The first curvature center and second curvature center are positioned on radially opposite sides of the first side wall, creating a streamlined path that eliminates sharp corners and abrupt changes in flow direction, thereby preventing vortex formation and reducing energy loss
2Device complexity
If refrigerant enters the suction cavity through the air inlet in conventional scroll compressors, then the structure can be simple, but velocity gradient and turbulence occur reducing refrigeration efficiency
Solution Approach 1:
The flow-guiding passage applies different curvature characteristics to different sections of the wrap. The first section has a first curvature center and the second section has a second curvature center on radially opposite sides, creating locally optimized flow paths that match the specific flow conditions at each location, thereby improving refrigeration efficiency without significantly increasing overall structural complexity
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
The solution significantly reduces pressure loss and enthalpy difference, enhancing the refrigeration efficiency of the scroll compressor while maintaining a simple and cost-effective structure.
Implementation Method 1
the refrigerant may produce turbulence or vortex and velocity gradient when it enters the suction cavity through the air inlet, which may cause pressure loss
Implementation Method 2
the first side wall includes a first section extending from the starting end and having a first curvature center and a second section extending from the first section and having a second curvature center
Data Source
AI summary
Disclosed are a fixed scroll and a scroll compressor. The fixed scroll comprises a fixed scroll end plate, a fixed scroll wrap, and a peripheral wall, wherein an air inlet is provided in the peripheral wall, the fixed scroll wrap comprises a starting end connected to the peripheral wall, an engagement position to be engaged with an orbiting scroll wrap, and a scroll section extending from the starting end to the engagement position; the fixed scroll further comprises a flow-guiding passage in fluid communication with the air inlet; the flow-guiding passage extends from the starting end and extends along at least part of the scroll section; the scroll section comprises a first side wall comprising a first section having a first center of curvature and a second section having a second center of curvature, which are respectively located on radially opposite sides of the first side wall.