| 摘要 |
A multi-layer disk fan with blades, which is operable quietly. In the multi-layer disk fan with the blades formed by laminating a multiplicity of annular disks at predetermined intervals therebetween, the arrangement having such a feature that a multiplicity of blades are interposed between the annular disks and the outer ends and/or the inner ends of the respective blades are positioned a predetermined distance inward of the outer peripheral edges of the annular disks is adopted. With this arrangement, turbulent flow caused by peeling at the tips of the blades through the effect of laminar flows by the disks can be effectively prevented, and moreover, distortion in the outlet speed at the outer peripheral edges of the annular disks can be controlled to reduce noises due to the turbulent flow and the interference, thus enabling the quiet operation. <IMAGE> |
