(19)
(11)EP 3 705 815 A3

(12)EUROPEAN PATENT APPLICATION

(88)Date of publication A3:
04.11.2020 Bulletin 2020/45

(43)Date of publication A2:
09.09.2020 Bulletin 2020/37

(21)Application number: 20157048.8

(22)Date of filing:  13.02.2020
(51)International Patent Classification (IPC): 
F25B 43/00(2006.01)
F25B 43/02(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
Designated Validation States:
KH MA MD TN

(30)Priority: 06.03.2019 JP 2019040474

(71)Applicant: Sumitomo Heavy Industries, Ltd.
Tokyo 141-6025 (JP)

(72)Inventor:
  • SEMURA, Kenta
    Tokyo, 188-8585, (JP)

(74)Representative: Louis Pöhlau Lohrentz 
Patentanwälte Postfach 30 55
90014 Nürnberg
90014 Nürnberg (DE)

  


(54)OIL SEPARATOR, FILTER ELEMENT, AND COMPRESSOR FOR CRYOCOOLER


(57) The outflow of oil from an oil separator (20) is reduced. An oil separator (20) includes: an oil separator container (44) ; and a filter element (46) that is disposed in the oil separator container (44), defines an outer cavity (48) between the oil separator container (44) and itself, includes an inner cavity (50) into which refrigerant gas is introduced, and separates oil from the refrigerant gas flowing to the outer cavity (48) from the inner cavity (50). The filter element (46) includes a tubular inner filter member (68) that surrounds the inner cavity (50), and an outer filter layer (72) that includes a refrigerant gas outlet surface (74) exposed to the outer cavity (48) and is disposed outside the inner filter member (68). A wire-like or band-like filter retaining member (60) that is in contact with the outer filter layer (72) from the outside may be provided. The refrigerant gas outlet surface (74) may occupy at least 80% of the surface area of the outer filter layer (72).







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