| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a blower capable of reducing noise without largely reducing intake efficiency. <P>SOLUTION: This blower has a blower unit 10 having a large number of blades 15 and composed of an outer diameter of ϕ100 mm to ϕ200 mm, and a case for storing this blower unit 10. An air outflow part 15b side end part in the respective blades 15 has a recess-projection 17 projecting in the fan rotating direction X2 of the blower unit 10 in the blade width direction Y2. A plurality of teeth 17a for constituting the recess-projection part 17 are characterized by being set by a value of a range becoming 0.015<(h<SB>1</SB>/D)<0.15 and 0.01<(p<SB>1</SB>/D)<0.1 to a fan outer diameter D of the blower unit 10 when the tooth height is set to h<SB>1</SB>and a tooth pitch is set to p<SB>1</SB>. <P>COPYRIGHT: (C)2006,JPO&NCIPI |
