(19)
(11) EP 1 975 415 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
23.05.2012 Bulletin 2012/21

(43) Date of publication A2:
01.10.2008 Bulletin 2008/40

(21) Application number: 08002967.1

(22) Date of filing: 18.02.2008
(51) International Patent Classification (IPC): 
F04C 28/08(2006.01)
F04C 23/00(2006.01)
 F04C 18/12(2006.01)
F04C 28/02(2006.01)
(84) Designated Contracting States:
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MT NL NO PL PT RO SE SI SK TR
Designated Extension States:
AL BA MK RS

(30) Priority: 30.03.2007 JP 2007095584

(71) Applicant: ANEST IWATA CORPORATION
Yokohama-shi, Kanagawa-ken 223-8501 (JP)

(72) Inventor:
  • Kimura, Hideyuki
    Yokohama-shi Kanagawa-ken 223-8501 (JP)

(74) Representative: Strehl Schübel-Hopf & Partner 
Maximilianstrasse 54
80538 München
80538 München (DE)

   


(54) Rotary compressor unit and method of controlling operation thereof


(57) The compressor unit having at least two compressors, for example a low pressure stage compressor (11) and a high pressure stage compressor (12) connected in series, of which the low pressure sage compressor (11) and high pressure stage compressor (12) are driven by driving devices (13 and 14) respectively separately or driven by a single driving device (41) via variable speed gears (43 and 44) respectively connected to each of the compressors, and rotation speed of the low pressure stage compressor (11) and that of the high pressure stage compressor (12) are controlled independently in accordance with various operating conditions of the compressor unit so that optimal load balancing of the compressors (11 and 12) is always achieved.







Search report