(19)
(11) EP 1 923 572 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
20.10.2010 Bulletin 2010/42

(43) Date of publication A2:
21.05.2008 Bulletin 2008/21

(21) Application number: 07012832.7

(22) Date of filing: 29.06.2007
(51) International Patent Classification (IPC): 
F04D 29/28(2006.01)
 F04D 25/08(2006.01)
(84) Designated Contracting States:
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU LV MC MT NL PL PT RO SE SI SK TR
Designated Extension States:
AL BA HR MK RS

(30) Priority: 14.11.2006 JP 2006307424

(71) Applicant: Panasonic Corporation
Kadoma-shi Osaka 571-8501 (JP)

(72) Inventors:
  • Kayama, Hiroyuki
    Osaka-shi Osaka 540-6319 (JP)
  • Nakamura, Kazushige
    Osaka-shi Osaka 540-6319 (JP)
  • Yokote, Shizuka
    Osaka-shi Osaka 540-6319 (JP)

(74) Representative: Eisenführ, Speiser & Partner 
Postfach 31 02 60
80102 München
80102 München (DE)

   


(54) Electric blower and electric cleaner using the same


(57) There is provided an electric blower capable of satisfactorily enhancing the blowing efficiency of an impeller and an electric cleaner having the electric blower. In the electric blower of the present invention, an area of a passage cross-section perpendicular to a center line of a passage, defined by front shroud 2, rear shroud 3 and hub 6 of inducer 8 from inlet 5 to outlet 25 of impeller 1, is monotonically increased from inlet 5 to outlet 25. Accordingly, air flow speed depending on the flow rate in impeller 1 is gradually decreased throughout the whole passage from inlet 5 to outlet 25, so that acceleration or rapid deceleration of the air flow speed is prevented, thereby satisfactorily enhancing the blowing efficiency.







Search report