Title:
AIR BLOWER
Document Type and Number:
Japanese Patent JP2020133525
Kind Code:
A
Abstract:
To enable easy attachment/detachment of a centrifugal fan while suppressing a back-flow of air to a suction port side by using a simple configuration in an air blower.SOLUTION: A first suction port 56 sucking air is formed in a scroll case 16 having first and second fans 20, 22 accommodated therein so as to face the first fan 20. A shroud 26a of the first fan 20 includes: a first shroud wall part 30 along the axial direction of a rotating shaft 18; and a second shroud wall part 32 extended from a lower end of the first shroud wall part 30 to the radial outer side. The scroll case 16 includes: a first case wall part 58 extended from a peripheral edge of the first suction port 56 in parallel with the first shroud wall part 30; a second case wall part 60 extended from the first case wall part 58 toward the radial inner side; and a third case wall part 62 extended from the second case wall part 60 toward the second shroud wall part 32. A groove part 86 surrounded by the first to third case wall parts 58, 60, 62 and opened on the first suction port side 56 is provided.SELECTED DRAWING: Figure 2
Inventors:
ITO KOEI
Application Number:
JP2019028988A
Publication Date:
August 31, 2020
Filing Date:
February 21, 2019
Export Citation:
Assignee:
KEIHIN CORP
International Classes:
F04D29/44
Attorney, Agent or Firm:
Takehiro Chiba
Toshiyuki Miyadera
Takayuki Chima
Yasuharu Nakasone
Shiro Sakai
Toru Sekiguchi
Toshiyuki Miyadera
Takayuki Chima
Yasuharu Nakasone
Shiro Sakai
Toru Sekiguchi