Patent ID: 6030286
Filing Date: 2000-02-29
Classification: B60H,F04D,F05D

Abstract:
A centrifugal blower comprising:a centrifugal blade fan having a plurality of main blades around a rotation axis thereof;a scroll casing encasing said centrifugal blade fan therein and forming an air passage through which air discharged by said centrifugal blade fan flows, said scroll casing having an intake opening which is opened in a direction of said rotation axis on said scroll casing; anda plurality of sub blades disposed at a location corresponding to said main blades in said intake opening, whereinan outer periphery of said intake opening is arranged outside of an inner edge of said main blade;said main blade defines an intake opening side end facing said intake opening, andsaid sub blade leads air to said intake opening side end of said main blade.