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J. Hefei Univ. Tech. (Nat. Sci.)

合肥工业大学学报(自然科学版)

JOURNAL OF HEFEI UNIVERSITY OF TECHNOLOGY (NATURAL SCIENCE)

Competent Authorities: Ministry of Education of the People's Republic of China

Sponsor by: Hefei University of Technology

ISSN 1000-1646, CN 34-1001/N

Flow characterization of scroll compressor oil-gas separator for electric vehicle air conditioner

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电动汽车空调涡旋压缩机油气分离器流动特性分析

Journal Information

J. Hefei Univ. Tech. (Nat. Sci.), Aug. 2026, Vol.49 No.8: 1033-1038

DOI: 10.3969/j.issn.1003-5060.2026.08.005

Authors

MEI Binyao, TANG Jingchun, ZHOU Pei, SUN Dongfang, PAN Shuli

(School of Automobile and Traffic Engineering, Hefei University of Technology, Hefei 230009, China)

Abstract and Keywords

Abstract: As a major component of an electric scroll compressor, the performance of the oil-gas separator is an important factor affecting the volumetric and isentropic efficiency of the compressor. This paper analyzes the flow characteristics, separation efficiency and pressure loss of the oil-gas separator at different structural parameters and operating conditions by numerical calculation and experimental study. Numerical calculation result shows that the fluid flow inside the oil-gas separator consists of two fluid regions: the downward external rotating flow and the upward internal rotating flow. With the increase of the compressor speed, the separation efficiency of the oil fraction is increased, but the pressure loss is also increased. When the compressor speed is lower than 5 000 r/min, the separation efficiency is decreased by increasing the inlet geometry angle of the oil fraction, in this case, the overall performance of the separator is optimized at an inlet angle of $ 0^{\circ} $. When the compressor speed is higher than 5 000 r/min, the pressure loss of the oil fraction is decreased by increasing the inlet geometry angle of the oil fraction, in this case, the overall performance of the separator is optimized at an inlet angle of $ 10^{\circ} $. The experimental result also shows that the oil separation efficiency is increased with an increase in the compressor speed.

Keywords: scroll compressor; oil-gas separator; inlet geometry angle; flow field analysis; separation efficiency; pressure loss

作者信息

梅滨尧，唐景春，周培，孙东方，潘淑丽

（合肥工业大学汽车与交通工程学院，安徽合肥230009）

摘要和关键词

摘要: 作为电动涡旋压缩机的主要部件,油气分离器的性能是影响压缩机容积效率和等熵效率的重要因素。文章采用数值计算与实验研究相结合的方法,分析了变结构参数和运行工况下油气分离器的流动特性及其对分离效率和压力损失的影响规律。数值计算结果表明:油气分离器内部流场由向下外旋流和向上内旋流2个流体区域组成;随着压缩机转速增加,油分分离效率提高,但压力损失也随之增大;当压缩机转速低于5 000 r/min时,增大油分入口几何角度会降低分离效率,其中入口几何角度为0°时分离器综合性能最优;当压缩机转速高于5 000 r/min时,增大油分入口几何角度会降低油分压力损失,其中入口几何角度为10°时分离器综合性能最优。实验结果同样表明,随着压缩机转速增加,油分分离效率相应提高。

关键词: 涡旋压缩机；油气分离器；入口几何角度；流场分析；分离效率；压力损失

Funding

国家自然科学基金资助项目（52306194）

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