Share

Recommended by the IIR

Development of compact and high-efficiency scroll compressor using shaft-through hybrid wrap.

Number: 1181

Author(s) : PARK S., KIM C., LEE K., CHOI Y., CHOI J., CHOI S., LEE B., HAN N., KIM S.

Summary

In general, compressors used for air conditioning fields are classified into the rotary type and the scroll type. Each of these two types has different advantages and disadvantages. Rotary compressors have advantages such as simple structure and oil management because compression parts are located at the bottom side. Oil can be supplied to the friction parts easily and after compression, the oil can be separated from refrigerant at the empty upper side. Scroll compressor’s continuous compression mechanism offers relatively higher efficiency and lower noise. But the compression parts have to be located at the upper side and consequently have complex structure. Most scroll compressors have additional frame below their motor and oil must be pumped up to the compression parts from the bottom reservoir. In some models, an additional oil separation device is necessary. A novel compressor, named R1, with both advantages of scroll and rotary had been developed. This new compressor has continuous compression mechanism of scroll and also simple structure of rotary. A new hybrid wrap has been applied to the compressor. The hybrid-wrap enable compression parts to be located in the bottom side because the crank shaft passed through the center of the fixed and orbiting scrolls. The shaft-through structure allows 3~17% efficiency improvement under low pressure ratio and low speed condition. With shaft-through structure, the orbiting scroll bearing can be aligned at the middle of height of the wrap. It offers a fundamental solution to scroll compressor’s own problem: Tilting of orbiting can be controlled by reducing the moment arm. The back pressure can be reduced because the tiling motion of orbiting scroll can be controlled with relatively small back pressure force. The R1 compressor has simple structure by removing the sub-frame. The compression parts moved to lower side from upper side, then the empty upper space can be utilized as an oil separation space. The oil circulation ratio has been reduced by more than 70% compared with other conventional scroll compressors of LG electronics under the actual loading condition. Comparing with rotary compressor, the noise of R1 compressor has decreased by 5dB.

Available documents

Format PDF

Pages: 10 p.

Available

Free

Download

Details

  • Original title: Development of compact and high-efficiency scroll compressor using shaft-through hybrid wrap.
  • Record ID : 30030272
  • Languages: English
  • Subject: Technology
  • Source: 2022 Purdue Conferences. 26th International Compressor Engineering Conference at Purdue.
  • Publication date: 2022/07/15

Links


See other articles from the proceedings (83)
See the conference proceedings

Indexing