Fixed Scroll Assembly Enhanced Vapor Injection Machining
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Solution Overview
Problem
Conventional scroll compressors face challenges in machining the enhanced vapor injection jet orifice due to the need to avoid the fixed scroll profile, resulting in limited size and flow area, and lack integration of variable displacement and enhanced vapor injection structures, leading to increased complexity and costs.
Innovation Solution
The solution involves a fixed scroll assembly with an enhanced vapor injection jet orifice drilled from the upper surface of the fixed scroll component, allowing for increased size and flow area, and integrating a variable displacement structure with the enhanced vapor injection structure, using a common sealing assembly to simplify the structure and machining process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the enhanced vapor injection jet orifice is drilled from the lower surface of the end plate to avoid the fixed scroll profile, then the orifice can be positioned to prevent fluid leakage, but the size and flow area of the orifice are limited
Solution Approach 1:
The patent inverts the conventional drilling direction by drilling the enhanced vapor injection jet orifice from the upper surface of the end plate downward through the fixed scroll, rather than from the lower surface. This inversion allows the orifice to be positioned at the upper surface where there are no profile constraints, enabling a larger orifice size and flow area while maintaining proper fluid isolation through the fixed scroll structure.
2Adaptability or versatility
If the variable displacement structure and enhanced vapor injection structure are integrated into a large-horsepower scroll compressor, then the compressor functionality is improved, but the number of parts, machining difficulty, and assembly time increase
Solution Approach 1:
The patent merges the variable displacement structure and enhanced vapor injection structure into a single integrated fixed scroll assembly. The fixed scroll component includes both the variable displacement bypass orifices and the enhanced vapor injection jet orifices, eliminating the need for separate components and reducing the number of parts. This integration also simplifies machining by allowing both types of orifices to be drilled in the same operational sequence from the upper surface of the end plate.
Solution Approach 2:
The fixed scroll assembly serves multiple functions simultaneously: it provides the variable displacement mechanism through bypass orifices, enables enhanced vapor injection through jet orifices, and acts as a sealing structure. This multi-functionality reduces the overall complexity of the compressor by consolidating what would traditionally require separate components into a single integrated assembly.
3Reliability
If multiple separate sealing components are used for the bypass orifice and enhanced vapor injection jet orifice, then each orifice can be sealed independently, but the number of sealing components and assembly steps increase
Solution Approach 1:
The patent combines the sealing functions for both the bypass orifices and enhanced vapor injection jet orifices into a single sealing assembly. This sealing assembly includes a sealing plate with sealing surfaces that simultaneously seal both types of orifices, eliminating the need for separate sealing components. The integrated sealing approach maintains reliable sealing for both orifice types while reducing the number of parts and assembly steps.
Data Source
AI summary
A fixed scroll assembly, a scroll compressor, and a method for machining a fixed scroll assembly includes a fixed scroll component and a sealing assembly. The fixed scroll component includes an end plate, a fixed scroll roll extending from a first side of the end plate, and an enhanced vapor injection hole extending from an upper surface of the fixed scroll component to a compression cavity. The enhanced vapor injection hole has a first end leading to the compression cavity, and a second end leading to the exterior of the fixed scroll assembly. The sealing assembly is configured to seal the second end of the enhanced vapor injection hole; and part of the enhanced vapor injection hole comprises a recess formed in the fixed scroll roll.