| 摘要 |
PURPOSE:To reduce loss and improve the blowing efficiency by installing an air- stream guiding plate which is overlapped with a guide, towards an impeller side, onto the bracket of a motor, and preventing the generation of collision and leak before the inflow of air into the motor. CONSTITUTION:An air-stream guiding plate 20 is formed, towards an impeller side 13, on a part or the whole parts in the periphery of a vent hole 17 on a bracket 16. Said air-stream guiding plate 20 is formed by bending the edge part of a bridge 18 part to the impeller 13 side and is projected integrally, and a part or the wole parts of said guide surface is opposed and overlapped with the air stream flowing passage in the vicinity of the edge of a guide 14. Since the air-stream guiding plate 20 is overlapped with the guide 14, the air stream which is discharged from the impeller 13 and passed through a return passage 14b flows into a motor 12 smoothly, and loss is reduced, and the blowing efficiency is improved. |
