Compressor Oil Return Unit with Pressure Reducing Passage
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Solution Overview
Problem
Existing compressors face challenges in efficiently supplying returned oil to the compressor housing due to complex oil supply passages, which can lead to reduced lubrication performance and increased power loss.
Innovation Solution
A compressor design with a simplified oil return unit featuring a single oil return passage in the fixed scroll and multiple oil supply passages in the main housing, including a pressure reducing unit that allows independent oil supply to different pressure spaces, such as the back pressure chamber and suction space, enhancing lubrication efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If oil is mixed with refrigerant to lubricate mechanical friction portions, then the oil supply structure is simplified, but some oil is discharged out of the compressor and the amount of oil is reduced
Solution Approach 1:
The patent implements an oil recovery system that captures oil discharged from the compressor along with refrigerant and returns it to the compression chamber. The oil recovery means includes a passage that collects oil from the discharge side and directs it back to the compression chamber, preventing oil loss while maintaining the simple mixing lubrication method.
2Loss of substance
If an oil separator is used to collect and return oil to the compressor, then oil loss is reduced, but the oil supply passage becomes complex
Solution Approach 1:
The patent merges the oil separation function with the existing compressor housing structure. The oil recovery passage is integrated into the compressor assembly, combining the oil separation and oil supply functions into a unified structure, thereby reducing overall system complexity while maintaining effective oil recovery.
3Reliability
If returned oil is supplied into the compressor at appropriate flow rate, then lubrication performance is improved, but the oil supply passage becomes complex
Solution Approach 1:
The patent provides different oil supply characteristics to different regions of the compressor. The oil supply passage is designed to deliver oil at appropriate flow rates to specific locations such as the suction space and back pressure chamber, ensuring proper lubrication in each region while maintaining a relatively simple overall passage structure.
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 design simplifies the oil supply passage, ensures efficient oil distribution to various spaces, and improves lubrication performance by directly supplying oil to the back pressure chamber, reducing the complexity of oil supply and enhancing the compressor's operational efficiency.
Implementation Method 1
a pressure reducing unit provided in the oil return passage or the first oil supply passage
Data Source
AI summary
Disclosed herein is a compressor with an oil return unit. The compressor includes: a main housing; a turning scroll which is turnably mounted to the housing; a fixed scroll which engages with the turning scroll and forms a compression chamber; an auxiliary housing which includes a discharge space communicating with an outlet side of the fixed scroll, and a collection space in which oil collected in the discharge space is temporarily stored; an oil return passage which is formed in the fixed scroll and communicates with the collection space; and an oil supply passage which is formed in the main housing, communicates with the oil return passage, and diverges such that oil is supplied to at least two places.