(19)
(11) EP 0 928 899 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
03.05.2000 Bulletin 2000/18

(43) Date of publication A2:
14.07.1999 Bulletin 1999/28

(21) Application number: 98114422.3

(22) Date of filing: 31.07.1998
(51) International Patent Classification (IPC)7: F04D 17/04, F04D 29/42
(84) Designated Contracting States:
AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE
Designated Extension States:
AL LT LV MK RO SI

(30) Priority: 12.01.1998 JP 360698

(71) Applicant: MITSUBISHI DENKI KABUSHIKI KAISHA
Tokyo 100-8310 (JP)

(72) Inventors:
  • Yoshihashi,Makoto c/o Mitsubishi Denki K.K.
    Chiyoda-ku, Tokyo 100-8310 (JP)
  • Ohashi, Katsumi c/o Mitsubishi Denki K.K.
    Chiyoda-ku, Tokyo 100-8310 (JP)
  • Uchiyama,Tetsuji c/o Mitsubishi Elec Eng Co.Ltd.,
    Chiyoda-ku, Tokyo 100 (JP)
  • Arai, Yauyuki c/o Mitsubishi Elec Eng Co.Ltd.,
    Chiyoda-ku, Tokyo 100 (JP)
  • Takahashi,Kengo c/o Mitsubishi Elec Eng Co Ltd.,
    Chiyoda-ku, Tokyo 100 (JP)
  • Kuwahara, Yoshiaki c/o Mitsubishi Elec Eng Co Ltd.
    Chiyoda-ku, Tokyo 100 (JP)
  • Miwa, Masaharu c/o Mitsubishi Elec Eng Co Ltd.,
    Chiyoda-ku, Tokyo (JP)

(74) Representative: Pfenning, Meinig & Partner 
Mozartstrasse 17
80336 München
80336 München (DE)

   


(54) Once-through blower


(57) A once-through blower including a once-through impeller (8) is described. The blower includes a blowout duct (10), a stabilizer (13) and a scroll casing (9). The stabilizer (13) provided at an end of the blowout duct (10) so as to face the once-through impeller (8). The scroll casing (9) is provided at the back of the once-through impeller (8) and connected to the blowout duct (10). The stabilizer (13) has a curved surface (18) which is formed along an arc (15). The diameter of the arc (15) is 103% or more of that of the once-through impeller (8). The scroll casing (9) has an interior curved surface (19) which is formed along a casing arc. The casing arc is concentric with the arc center (21). A clearance between a predetermined outer peripheral point (23) of the once-through impeller (8) and the inflow-side end of the scroll casing (9) is set so as to become 3% or more of the diameter of the once-through impeller (8).






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