| 摘要 |
PROBLEM TO BE SOLVED: To provide a multi-blade centrifugal fan provided with blade form capable of increasing delivery pressure, and contributing to noise reduction. SOLUTION: This multi-blade centrifugal fan is provided with a boss part fixed to a rotary shaft, a cone part continuously provided with the boss part, and a plurality of forward blades 4 provided along the outer circumferential edge of the cone part. Air flowing from a suction port part is introduced along the cone part toward the blades to pass between the blades. The blades 4 are molded by molding in an upper and a lower molding dies, and leading edge parts 4e of the blades 4 are formed as edges. COPYRIGHT: (C)2005,JPO&NCIPI
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