(19)
(11) EP 2 597 314 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
18.03.2015 Bulletin 2015/12

(43) Date of publication A2:
29.05.2013 Bulletin 2013/22

(21) Application number: 12194027.4

(22) Date of filing: 23.11.2012
(51) International Patent Classification (IPC): 
F04D 25/06(2006.01)
F04D 29/52(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: 25.11.2011 JP 2011257545

(71) Applicant: Sanyo Denki Co., Ltd.
Tokyo 170-8451 (JP)

(72) Inventors:
  • Yen, KEVIN
    Toshima-ku, Tokyo 170-8451 (JP)
  • Mitomo, Shigekazu
    Toshima-ku, Tokyo 170-8451 (JP)

(74) Representative: Copsey, Timothy Graham et al
Kilburn & Strode LLP 20 Red Lion Street
London WC1R 4PJ
London WC1R 4PJ (GB)

   


(54) Axial-flow fan


(57) An axial-flow fan 100 includes an impeller 10 mounted on a rotating shaft 21 of a rotary drive device 20 and a venture casing 30 surrounding an outer periphery of the impeller 10 in a radial direction and including a suction port 41 and a discharge port 42 facing each other in an axial direction of the rotating shaft 21. An inner surface of the venture casing 30 includes a suction-side slant part 31 expending the suction port 41 outward in the radial direction of the impeller 10, a linear part 32 continuing from the suction-side slant part 31 and forming an axial flow of a fluid with the impeller 10, a discharge-side slant part 34 expanding the discharge port 42 outward in the radial direction of the impeller 10, and a curved part 33 connecting the linear part 32 and the discharge-side slant part 34.







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Search report