Scroll Compressor Discharge Guide for Bypass Valve Integration
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Solution Overview
Problem
Conventional scroll compressors face difficulties in optimizing compression efficiency at low load states due to the lack of sufficient space for a bypass valve on the fixed scroll, leading to inefficiencies, noise, and vibration issues during refrigerant discharge.
Innovation Solution
A compressor design incorporating a bypass structure with a discharge guide and bypass valve system that separates high and low-pressure regions, allowing for effective discharge of over-compressed refrigerant and reducing noise and vibration by guiding refrigerant through a middle-pressure chamber formed by the fixed scroll, orbiting scroll, and back-pressure cover.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If a bypass valve is mounted on the fixed scroll, then low-load compression efficiency is improved, but the available space on the fixed scroll is insufficient
Solution Approach 1:
The bypass valve is relocated from the two-dimensional surface of the fixed scroll to a three-dimensional space above it. The discharge guide extends upward to create a vertical passage, and the bypass valve is mounted on the discharge guide rather than the fixed scroll surface, effectively utilizing the vertical dimension to resolve the space constraint.
Solution Approach 2:
The discharge guide serves as an intermediary structure between the compression chamber and the bypass valve. It provides a mounting platform for the bypass valve and creates a controlled passage for refrigerant flow, enabling the bypass function without requiring direct mounting on the fixed scroll.
2Device complexity
If refrigerant is discharged directly from the compression chamber, then the discharge process is simple, but noise and vibration increase
Solution Approach 1:
The discharge guide acts as an intermediary structure between the compression chamber and the discharge outlet. It provides a controlled passage that guides refrigerant flow smoothly, reducing turbulence and the associated noise and vibration while maintaining relative simplicity in the discharge process.
3Reliability
If the middle pressure portion is provided in the fixed scroll, then sealing property is maintained, but the space for bypass valve formation is insufficient
Solution Approach 1:
The bypass valve and its associated structures are positioned in the vertical dimension above the fixed scroll, rather than attempting to incorporate them into the horizontal plane of the fixed scroll. This dimensional separation allows the middle pressure portion to maintain sealing function while the bypass valve occupies vertical space.
Solution Approach 2:
The compressor is divided into functionally separate components: the fixed scroll maintains sealing and compression functions, while the discharge guide and bypass valve form a separate assembly mounted above. This segmentation allows each component to optimize its specific function without spatial interference.
Data Source
AI summary
A compressor includes a discharge guide provided to communicate a discharge port and a bypass port to a discharge cover so that refrigerant discharged from the discharge port and the bypass port is guided to the discharge cover and a middle-pressure chamber formed by the fixed scroll, the back-pressure cover, and the discharge guide. The compressor according to the embodiments guarantees the space in which the bypass valve can be installed by a discharge guide mounted to a discharge portion of the fixed scroll, and at the same time forms the middle pressure portion, resulting in efficiency improvement of the compressor. The compressor according to the embodiments reduces noise and vibration generated from the discharge portion of the fixed scroll by the discharge guide.