Scroll Wrap Oil Hole Layout for Lower Oil Circulation
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Solution Overview
Problem
Conventional scroll compressors face challenges in managing lubricating oil circulation rate and refrigerant temperature, leading to inefficiencies and wear between scroll wraps.
Innovation Solution
The introduction of a scroll design with strategically positioned oil holes, including first, second, and third oil hole portions, which facilitate the controlled distribution and reduction of lubricating oil, enhancing lubrication and sealing, and minimizing refrigerant superheating and oil leakage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If conventional scroll compressor design is used, then structure is simple, but lubricating oil circulation rate is high and refrigerant temperature increases
Solution Approach 1:
The oil hole is divided into multiple portions (first oil hole portion in the end plate, second oil hole portion extending to the scroll wrap, and optionally third oil hole portion in the hub portion) to control and segment the oil flow path, thereby reducing the circulation rate of lubricating oil while maintaining simple overall structure
Solution Approach 2:
The oil hole is strategically positioned at specific locations (first oil hole portion in the end plate, second oil hole portion opening in the strip-shaped surface of the scroll wrap) to locally control oil distribution, reducing overall oil circulation rate while ensuring adequate lubrication where needed
2Ease of manufacture
If conventional scroll compressor design is used, then manufacturing is simple, but refrigerant temperature and oil circulation rate increase
Solution Approach 1:
The oil hole is segmented into multiple portions extending through different components (end plate, scroll wrap, hub portion) to control oil flow and reduce refrigerant temperature, while maintaining manufacturability through standard drilling and machining operations
3Device complexity
If conventional scroll compressor design is used, then structure is simple, but wear between scroll wraps increases
Solution Approach 1:
The oil hole is positioned to open in the strip-shaped surface of the scroll wrap at specific locations, providing localized oil supply to reduce wear between scroll wraps while maintaining simple overall structure
Solution Approach 2:
The oil hole structure is designed to supply lubricating oil in advance to the scroll wrap contact surfaces, preventing wear before it occurs by ensuring adequate lubrication at critical locations
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
Improves the performance of scroll compressors by reducing lubricating oil circulation rate and refrigerant temperature, minimizing oil leakage, and enhancing energy efficiency and sealing, thereby improving mass flow rate and energy efficiency ratio.
Implementation Method 1
A lubricating oil of the scroll compressor needs to be managed to reduce the circulation rate of the lubricating oil and the temperature of the discharged refrigerant
Implementation Method 2
reduce the circulation rate of the lubricating oil and the temperature of the discharged refrigerant
Data Source
AI summary
A scroll for a scroll compressor and a scroll compressor is disclosed. The scroll includes an end plate having first and second surfaces opposite to each other; a scroll wrap extending from the first surface of the end plate; and at least one oil hole including a first oil hole portion extending in the end plate, and a second oil hole portion extending in the end plate and the scroll wrap and extending from the first oil hole portion to a strip-shaped surface of the scroll wrap away from the end plate, the second oil hole portion having an opening in the strip-shaped surface of the scroll wrap. The oil hole reduces circulation rate of the lubricating oil and temperature of the discharged refrigerant.