Multiblade blower
AssigneeSanden Corporation
InventorMichio Kitazume
Life of this patent
Estimating the term…
Abstract
Air flows along pressure surfaces and suction surfaces of main blades of an inner blade group by rotation of an impeller. When the air passes the inner blade group, the air flowing along the suction surfaces of the main blades tends to separate from the suction surfaces, and shearing flows tend to be formed behind outer diameter end portions of the main blades. Here, the auxiliary blades of the outer blade group are placed inside the air flows passing between the main blades of the inner blade group, and therefore the auxiliary blades restrain the separation of air flows, and the shearing flows.
Claims8
A multiblade blower, comprising an impeller having a plurality of blades placed circumferentially, and taking in air from a side of an inner diameter end portion of each of the blades and discharging the air from a side of an outer diameter end portion of each of the blades by rotation of the impeller,
- wherein two or more of blade groups in each of which said blades are placed in a ring shape are placed at least in a diameter direction inside and outside, and each blade of the outer blade group out of the blade groups is placed inside air flows passing between blades of the inner blade group.
Dependencies are inferred from the claim text.