| 摘要 |
PURPOSE: A turbo fan for window air conditioner is provided to reduce the size of the air conditioner, while improving productivity by forming a shroud, blade and hub into a single unit. CONSTITUTION: A turbo fan comprises a hub(204); 7 to 11 blades(205) disposed at a predetermined space along the hub, and each of which has a width decreasing as it goes from the hub toward a shroud(203); and the shroud connected in common to each blade from the opposite side of the hub. The turbo fan has a total width 35 to 45 percent of the outer diameter of the blade, an outlet width 50 to 60 percent of the total width, and an inlet width 85 to 92 percent of the total width. The blade has an inner diameter at the hub side 45 to 55 percent of the outer diameter of the blade, and an inner diameter at the shroud side 60 to 70 percent of the outer diameter of the blade. Each blade has 30 to 60 degree of shroud side tilt angle, 55 to 65 degree of outlet angle, 15 to 30 degree of hub side inlet angle, 40 to 55 degree of shroud side inlet angle, 0.3 to 0.5 of maximum camber position, and a maximum thickness of 5 to 8 percent of hub side chord length and 7 to 12 percent of shroud side chord length.
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