| 摘要 |
A centrifugal blower comprises: an impeller (2) provided with blades (12); a casing (3) which houses the impeller (2), radially externally surrounds the impeller (2) to form a spiral flow passage (C1) through which air (AR) can flow, and is provided with a nose section (30) forming the start point (S) of the spiral flow passage (C1) and the end point (E) thereof where one turn of the spiral flow passage (C1) from the start point (S) terminates; a drive section (4) for rotating the impeller (2) about the center axis (O) thereof; and a vane (5) which is provided on the bottom plate (22) of the casing (3), divides the spiral flow passage (C1) in the radial direction of the impeller (2), and extends in the circumferential direction of the impeller (2). The rear edge (6) of the vane (5) is located upstream of the nose section (30) in the main flow direction (DI) of the spiral flow passage (C1). |
