(19)
(11) EP 2 762 803 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
18.11.2015 Bulletin 2015/47

(43) Date of publication A2:
06.08.2014 Bulletin 2014/32

(21) Application number: 14152364.7

(22) Date of filing: 24.01.2014
(51) International Patent Classification (IPC): 
F25B 31/00(2006.01)
 F25B 1/10(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: 30.01.2013 JP 2013015324

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

(72) Inventors:
  • Taniguchi, Masahiro
    TOKYO, 108-8215 (JP)
  • Mizuno, Hisao
    TOKYO, 108-8215 (JP)
  • Kimata, Yoshiyuki
    TOKYO, 108-8215 (JP)
  • Hotta, Youhei
    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 compression device and chilling/air-conditioning device using the same


(57) There are provided a two-stage compression device having two serially connected compressors, of which the number of components is reduced through omission of an oil separator, and thereby the configuration is made simpler, lower in cost, and more compact, and a chilling/air-conditioning device using the two-stage compression device. The two-stage compression device 2 which compresses a refrigerant in two stages includes two serially connected compressors of which a low stage-side compressor 10 and a high stage-side compressor 20 in which, of the two compressors 2, the low stage-side compressor 10 is a low pressure housing-type compressor 10, while the high stage-side compressor 20 is a high pressure housing-type compressor 20, and an oil sump 25 of the high pressure housing-type compressor 20 and an oil sump 15 of the low pressure housing-type compressor 10 are connected through an oil return pipe 27.







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