| 摘要 |
PURPOSE:To increase wind amount and static pressure for improving efficiency by providing in a discharging portion of a blade a bend having an outlet angle converging from the retaining plate side to the back plate side. CONSTITUTION:At the discharging port side of a blade 4 provided between a retaining plate 1 having an intake port 2 and a back plate 3 are provided a backside bend 5 formed by bending an end of retaining plate 1 side backward and a belly surface bend 6 formed by bending an end of the back plate 3 side to the belly surface side. Thus, when a turbo fan is rotated, discharge speed of air sucked from the intake port 2 provided at the retaining plate 1 side having the back side bend is accelerated by the back bend 5 at the discharge side of the blade 4, while decelerated at the back plate 3 side provided with the belly surface side bend 6. Thus, a phenomenon that the bend tends to be exfoliated from the retaining plate 1 surface is weakened to uniform axially the discharge air speed and improve efficiency.
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