Login| Sign Up| Help| Contact|

Patent Searching and Data


Title:
MULTISTAGE COMPRESSION SYSTEM
Document Type and Number:
WIPO Patent Application WO/2020/067194
Kind Code:
A1
Abstract:
In a refrigeration device using a plurality of multistage compressors, it has been necessary to keep refrigerating machine oil at an appropriate amount in each of the compressors. There has been a problem that when oil discharged from a compressor on a high stage is returned to the refrigerant suction side of a compressor on a low stage, heat loss and pressure loss occur and the efficiency of the system is decreased. A multistage compression system (20) has a low-stage compressor (21), a high-stage compressor (23), and an oil returning tube (31). The low-stage compressor (21) has a compression part (50), a motor (40), and a container (30). The container (30) houses the compression part (50) and the motor (40). The oil returning tube (31) is connected to a space lower than the motor (40) inside the container (30).

More Like This:
Inventors:
OKAMOTO DAISUKE
TOMIOKA NAOTO
KAJIWARA MIKIO
NISHIDE YOHEI
OHNISHI YOUSUKE
ADACHI MASAAKI
Application Number:
JP2019/037669
Publication Date:
April 02, 2020
Filing Date:
September 25, 2019
Export Citation:
Click for automatic bibliography generation   Help
Assignee:
DAIKIN IND LTD (JP)
International Classes:
F25B1/00; F04B39/00; F04C23/00; F04C29/02; F25B1/10
Foreign References:
JP2008261227A2008-10-30
JP2009079820A2009-04-16
JP2011202817A2011-10-13
JP2015034536A2015-02-19
JP2007009922A2007-01-18
JP2001272122A2001-10-05
JP2017044420A2017-03-02
JP2006258002A2006-09-28
Attorney, Agent or Firm:
SHINJYU GLOBAL IP (South Forest Bldg, 1-4-19 Minamimori-machi, Kita-ku, Osaka-sh, Osaka 54, 〒5300054, JP)
Download PDF: