(19)
(11) EP 0 477 650 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
15.07.1992 Bulletin 1992/29

(43) Date of publication A2:
01.04.1992 Bulletin 1992/14

(21) Application number: 91115274.2

(22) Date of filing: 10.09.1991
(51) International Patent Classification (IPC)5: F04D 23/00, F04D 29/04, F04D 29/66, F04D 29/58, F04D 5/00
(84) Designated Contracting States:
DE FR GB IT

(30) Priority: 14.09.1990 JP 242323/90
19.10.1990 JP 279013/90
19.10.1990 JP 279014/90
19.10.1990 JP 279015/90
17.10.1990 JP 276324/90

(71) Applicant: HITACHI, LTD.
Chiyoda-ku, Tokyo 101 (JP)

(72) Inventors:
  • Eiichi, Ito
    Narashino-shi, Chiba (JP)
  • Yamazaki, Susumu
    Tsuchiura-shi, Ibaraki (JP)
  • Fujio, Masayuki
    Sakura-shi, Chiba (JP)
  • Yoshidomi, Toshiharu
    Funabashi-shi, Chiba (JP)
  • Asabuki, Hiroshi
    Sakura-shi, Chiba (JP)
  • Kobayashi, Kazuo
    Chiba-shi, Chiba (JP)
  • Hasegawa, Kengo
    Sakura-shi, Chiba (JP)
  • Chihara, Yukio
    Chiba-shi, Chiba (JP)
  • Fujita, Hajime
    Tsuchiura-shi, Ibaraki (JP)

(74) Representative: Patentanwälte Beetz - Timpe - Siegfried Schmitt-Fumian - Mayr 
Steinsdorfstrasse 10
80538 München
80538 München (DE)


(56) References cited: : 
   
       


    (54) Vortex flow blower


    (57) A vortex flow blower includes a blower casing (3) having an annular flow passageway (3a) extending from an inlet port (3b) for receiving fluid to an outlet port (3c) for discharging the fluid, the outlet port (3c) being disposed adjacent to the inlet port (3b), an impeller (1) accommodated in the blower casing (3)
    for producing a vortex flow of the fluid in the annular flow passageway (3a), and a driver (30) for driving the impeller (1). Further, the vortex flow blower includes a member and/or a configuration thereof for enabling at least one of a reduction of temperature of the fluid discharged from the vortex flow blower, an increase in at least one of flow rate and pressure of the discharge fluid, a reduction in noise level of the vortex flow blower, and a compact configuration of the vortex flow blower.






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