(19)
(11) EP 1 683 972 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
29.06.2011 Bulletin 2011/26

(43) Date of publication A2:
26.07.2006 Bulletin 2006/30

(21) Application number: 05028212.8

(22) Date of filing: 22.12.2005
(51) International Patent Classification (IPC): 
F04D 29/28(2006.01)
F04D 17/16(2006.01)
 F04D 29/30(2006.01)
F04D 29/42(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 NL PL PT RO SE SI SK TR
Designated Extension States:
AL BA HR MK YU

(30) Priority: 25.01.2005 KR 2005006643

(71) Applicant: LG Electronics, Inc.
Seoul (KR)

(72) Inventors:
  • KIM, Wook
    Songpa-ku, Seoul 138-180 (KR)
  • KIM, Chang Joon
    Dongjak-seoul 156-020 (KR)
  • BAE, Jun Ho
    Mapo-ku, Seoul 121-042 (KR)

(74) Representative: Vossius & Partner 
Siebertstrasse 4
81675 München
81675 München (DE)

   


(54) Blowing device


(57) Disclosed herein is a blowing device for small-sized electronic appliances such as cleaning apparatuses. The blowing device comprises a housing (50), a centrifugal impeller (60), a guide vane (70), and a motor for rotating the centrifugal impeller (60). The centrifugal impeller (60) comprises a shroud (62), a hub (64), and a plurality of impeller blades (66) which have an average diameter 87~93 % of a diameter of the housing. The shroud (62) and the hub (64) of the centrifugal impeller (60), and the guide vane (70) are optimally designed with respect to a size of the housing (50) or an average diameter of the impeller blades (66), maximizing fan efficiency and heat dissipation of the motor.







Search report