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Patent Searching and Data


Title:
MULTISTAGE COMPRESSION DEVICE, REFRIGERATION CYCLE COMPRISING SAME, AND OPERATION METHOD FOR MULTISTAGE COMPRESSION DEVICE
Document Type and Number:
WIPO Patent Application WO/2017/170356
Kind Code:
A1
Abstract:
A multistage compression device (20) comprising: a plurality of compressors (21A, 21C) arranged in series in a refrigerant circulation line (10); rotational frequency modifiers (29A, 29C), provided to each of the plurality of compressors (21A, 21C); and a control device (100). In order that the outflow oil amount of a downstream-side compressor is less than the outflow oil amount of an upstream-side compressor, the control device (100) comprises a rotational frequency setting unit (102) for setting the rotational frequency of each of the compressors (21A, 21C), and a rotational speed instruction unit (105) for instructing the corresponding rotational frequency modifier of the rotational frequency of the respective compressors as set by the rotational frequency setting unit (102).

Inventors:
MAENO Masashi (16-5, Konan 2-chome, Minato-k, Tokyo 15, 〒1088215, JP)
YOSHIDA Shigeru (16-5, Konan 2-chome, Minato-k, Tokyo 15, 〒1088215, JP)
Application Number:
JP2017/012307
Publication Date:
October 05, 2017
Filing Date:
March 27, 2017
Export Citation:
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Assignee:
MITSUBISHI HEAVY INDUSTRIES THERMAL SYSTEMS, LTD. (16-5, Konan 2-chome Minato-k, Tokyo 15, 〒1088215, JP)
International Classes:
F25B1/00; F25B1/10
Foreign References:
JP2013024447A2013-02-04
JP2006214602A2006-08-17
JPH11142002A1999-05-28
EP2088388A12009-08-12
JP2003279175A2003-10-02
JPH0735425A1995-02-07
JP2013024447A2013-02-04
Other References:
See also references of EP 3392577A4
Attorney, Agent or Firm:
MORI Ryuichirou et al. (1-9-2, Marunouchi Chiyoda-k, Tokyo 20, 〒1006620, JP)
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