×

Centrifugal Blower

  • US 20080279681A1
  • Filed: 03/29/2006
  • Published: 11/13/2008
  • Est. Priority Date: 03/31/2005
  • Status: Active Grant
First Claim
Patent Images

1. A centrifugal blower having:

  • an impeller;

    a casing that houses said impeller and forms a spiral flow passage that surrounds a radial direction outside of said impeller; and

    a driving device that rotates said impeller about an axis, whereinsaid impeller has;

    a disk shaped bottom plate that is rotated about said axis by said driving device;

    a plurality of blades provided so as to project in said axial direction on a same circumference of said bottom plate; and

    a substantially annular plate shape shroud that has said blades interposed between it and said bottom plate, and that is disposed concentric with said bottom plate, and that connects end sections of the respective blades,said shroud has;

    an inclined section that comes closer to said bottom plate moving from a radial direction inside to a radial direction outside; and

    a shroud side barrier that rises from a position on the radial direction outside of said inclined section towards a side opposite to said bottom plate, andsaid casing has;

    a bell-mouth that opposes an area on a radial direction inside of an inner periphery of said shroud; and

    a casing side barrier that projects from a position on the radial direction outside of said bell-mouth to an area between said inner periphery of said shroud and said shroud side barrier.

View all claims
  • 1 Assignment
Timeline View
Assignment View
    ×
    ×