| 摘要 |
PURPOSE: To facilitate assembly, thin a shape, reduce nose, and reduce vibration. CONSTITUTION: A centrifugal fan 10 formed by integrating with a plurality of blades 11 on the outer circumferential side of a core plate 12 is housed in a casing 18, and fan motor 19 is housed in a rear supporting tool 21 fixed to the casing 18. In the core plate 12, a boss part 12a is formed continuously to a recessed part whose center part is recessed forward in a bell shape. A recessed part which is the same as the recessed part of the core plate 12 is provided on the center part of the back surface plate 18bb of the casing 18, and the bracket of a fan motor 19 is entered and fixed on the recessed part. The rotary shaft 19a of the fan motor 19 is inserted to the boss part 12a of the core plate 12 while penetrating the recessed part. A bell-mouth 18ab is formed on the side part of an opening provided on the front surface plate 18aa of the casing 18. And a part of the bell-mouth 18ab enters a back recessed part 15 provided on the tip end of the blade 11. |
