Title:
MULTIPLE-STAGE COMPRESSOR
Document Type and Number:
WIPO Patent Application WO/2020/059608
Kind Code:
A1
Abstract:
The purpose of the invention is to provide a multiple-stage compressor in which numerous vales, openings, and pipes unique to two-stage compression are consolidated, and which can be maintained and made compact. To achieve this purpose, the compressor comprises: a plurality of compression chambers provided inside a casing; an intermediate-pressure refrigerant discharge port 123 that discharges intermediate-pressure refrigerant RM3 from a low-stage-side compression chamber of the plurality of compression chambers; an intermediate-pressure refrigerant intake port 122 that opens in the same direction as the intermediate-pressure refrigerant discharge port 123 and allows the intermediate-pressure refrigerant RM3 to be drawn into a high-stage side of the plurality of compression chambers; a high-pressure refrigerant discharge port 124 that opens in the same direction as the intermediate-pressure refrigerant discharge port 123 and discharges high-pressure refrigerant discharged from a high-stage-side compressor of the plurality of compression chambers; and a refrigerant connection cover that is removable attached to the casing and that forms an intermediate-pressure refrigerant chamber 116, which communicates with the intermediate-pressure refrigerant intake port 122 and the intermediate-pressure refrigerant discharge port 123 and which is provided with an external intermediate-pressure refrigerant connection inlet 126 opening to the exterior, and a high-pressure refrigerant chamber 117, which communicates with the high-pressure refrigerant discharge port 124 and which is provided with a high-pressure refrigerant outlet 125 opening to the exterior.
Inventors:
AJIMA MASAAKI (JP)
IWASAKI MASAMICHI (JP)
TERAWAKI HIROYUKI (JP)
IWASAKI MASAMICHI (JP)
TERAWAKI HIROYUKI (JP)
Application Number:
PCT/JP2019/035772
Publication Date:
March 26, 2020
Filing Date:
September 11, 2019
Export Citation:
Assignee:
FUJI ELECTRIC CO LTD (JP)
International Classes:
F04C18/02; F04C23/00; F04C28/26
Domestic Patent References:
| WO2011055444A1 | 2011-05-12 |
Foreign References:
| JPH06159278A | 1994-06-07 | |||
| JP2018009565A | 2018-01-18 | |||
| JP2018127903A | 2018-08-16 | |||
| JP2007009772A | 2007-01-18 | |||
| JP2004332556A | 2004-11-25 |
Other References:
See also references of EP 3842640A4
Attorney, Agent or Firm:
SAKAI INTERNATIONAL PATENT OFFICE (JP)
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