(19)
(11) EP 1 703 138 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
24.03.2010 Bulletin 2010/12

(43) Date of publication A2:
20.09.2006 Bulletin 2006/38

(21) Application number: 06003542.5

(22) Date of filing: 22.02.2006
(51) International Patent Classification (IPC): 
F04D 29/44(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: 24.02.2005 JP 2005048370

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

(72) Inventors:
  • Sakai, Hirokazu, c/o Matsushita Elect.Ind.Co.,Ltd.
    Chuo-ku, Osaka 540-6319 (JP)
  • Tatsumu,Yoshikimi, c/oMatsushita Elect.Ind.Co.,Ltd
    Chuo-ku, Osaka 540-6319 (JP)
  • Nakao, Kazuki, c/o Matsushita Elect.Ind.Co.,Ltd.
    Chuo-ku, Osaka 540-6319 (JP)

(74) Representative: Eisenführ, Speiser & Partner 
Postfach 10 60 78
28060 Bremen
28060 Bremen (DE)

   


(54) Blower


(57) A blower includes a multiblade fan (3) and a scroll casing (4) accommodating the multiblade fan (3) therein. The scroll casing (4) has two side walls (13) opposed to each other, a curved peripheral wall (12a, 12b), and a tongue (9) continuous with the curved peripheral wall (12a, 12b). The scroll casing (4) also has an intake opening defined in one of the two opposed side walls (13) and a discharge opening (8) delimited by the two side walls (13), the curved peripheral wall (12a, 12b), and the tongue (9). The curved peripheral wall (12a, 12b) has a first peripheral wall (12a) continuous with the tongue (9) and a second peripheral wall (12b) formed on a downstream side of the first peripheral wall (12a) with respect to the direction of travel of air so as to be continuous with the first peripheral wall (12a). The first peripheral wall (12a) is concentric with the multiblade fan (3) and has a constant radius of curvature, while the second peripheral wall (12b) has an expansion angle such that a distance (L) between a center (11) of the multiblade fan (3) and the second peripheral wall (12b) increases towards the discharge opening (8).







Search report