(19)
(11) EP 2 685 106 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
02.04.2014 Bulletin 2014/14

(43) Date of publication A2:
15.01.2014 Bulletin 2014/03

(21) Application number: 13176012.6

(22) Date of filing: 11.07.2013
(51) International Patent Classification (IPC): 
F04C 18/02(2006.01)
F04C 23/00(2006.01)
 F04C 18/356(2006.01)
F01C 21/08(2006.01)
(84) Designated Contracting States:
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR
Designated Extension States:
BA ME

(30) Priority: 12.07.2012 JP 2012156430

(71) Applicant: MITSUBISHI HEAVY INDUSTRIES, LTD.
Tokyo 108-8215 (JP)

(72) Inventors:
  • Miyamoto, Yoshiaki
    TOKYO, 108-8215 (JP)
  • Kimata, Yoshiyuki
    TOKYO, 108-8215 (JP)
  • Uno, Masanari
    TOKYO, 108-8215 (JP)
  • Goto, Toshiyuki
    TOKYO, 108-8215 (JP)
  • Sato, Hajime
    TOKYO, 108-8215 (JP)

(74) Representative: Intès, Didier Gérard André et al
Cabinet Beau de Loménie 158, rue de l'Université
75340 Paris Cedex 07
75340 Paris Cedex 07 (FR)

   


(54) Two-stage compressor and two-stage compression system


(57) A two-stage compressor (1) is an intermediate-pressure-housing type two-stage compressor which includes a low-stage-side compressor (2) and a high-stage-side compressor (3) both provided inside a housing (10), and in which a refrigerant compressed to an intermediate pressure in the low-stage-side compressor (2) is discharged inside the housing (10) and the intermediate-pressure refrigerant is sucked into the high-stage-side compressor (3) and compressed to a high pressure. The low-stage-side compressor (2) is a rotary compressor equipped with a blade (26) partitioning an inside of a cylinder chamber into a suction side and a compression side and the blade reciprocates in response to rotation of a rotor (24). The blade (26) is formed of a material having a density of 3 g/cm3 or less so as to reduce the blade's inertial force in response to a lower back pressure acting on a back surface of the blade.







Search report









Search report