CENTRIFUGAL BLOWER AND AIR CLEANER INCLUDING THE SAME

摘要

PROBLEM TO BE SOLVED: To provide a centrifugal blower excellent in noise reduction effect, and an air cleaner including the centrifugal blower.SOLUTION: An inner peripheral surface 7 in a centrifugal blower 4 is configured such that a maximum portion (72M) in which a difference (Rb-Ra) between a casing radius (Rb) and a reference radius (Ra) is maximum in a second portion (72) is positioned at a winding angle in a circumferential direction from a winding start part (6S) in a casing (6) that is larger than 180 degrees, and the difference (Rb-Ra) from the maximum portion (72M) to a winding end part (6E) of the casing (6) is made smaller toward the winding end part (6E).SELECTED DRAWING: Figure 5