(19)
(11) EP 1 297 772 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
13.08.2003 Bulletin 2003/33

(43) Date of publication A2:
02.04.2003 Bulletin 2003/14

(21) Application number: 02013503.4

(22) Date of filing: 17.06.2002
(51) International Patent Classification (IPC)7: A47L 5/22, A47L 9/22
(84) Designated Contracting States:
AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE TR
Designated Extension States:
AL LT LV MK RO SI

(30) Priority: 26.09.2001 KR 2001059485
03.01.2002 KR 2002000250
03.01.2002 KR 2002000253

(71) Applicant: LG ELECTRONICS INC.
Seoul 150-010 (KR)

(72) Inventors:
  • Rew, Ho Seon
    Seoul 121-180 (KR)
  • Lee, Young Woo
    Kangnam-ku, Seoul 120-191 (KR)

(74) Representative: TER MEER STEINMEISTER & PARTNER GbR 
Patentanwälte, Mauerkircherstrasse 45
81679 München
81679 München (DE)

   


(54) Centrifugal blower for vacuum cleaner


(57) Disclosed is a centrifugal blower for a vacuum cleaner capable of achieving an improvement in motor cooling efficiency. The centrifugal blower includes air guides so that air sequentially passing through an impeller (54), diffuser vanes (56), and guide vanes (7) is guided in a concentrated fashion toward the rotor (64) of a motor (60). Accordingly, the rotor (64) generating a large amount of heat during operation of the motor (60) is effectively cooled, so that it is possible to achieve an improvement in the reliability of the motor while extending the life span of the motor, and reducing the insulation grade of the motor.






Search report