| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a fan, a casting die and a fluid delivery device, capable of obtaining excellent air blowing capability and reducing noise. <P>SOLUTION: A cross flow fan is provided with multiple fan blades 21 that are circumferentially provided with intervals therebetween. Each of the fan blades 21 has an inner edge 27 arranged on an inner peripheral side and an outer edge 26 arranged on an outer peripheral side. In the fan blade 21, a blade surface 23 extending between the inner edge 27 and the outer edge 26 is formed. An air flow flowing between the inner edge 27 and the outer edge 26 is generated on the blade surface 23 with rotation of the fan. The fan blade 21 has an airfoil profile in which a recess 41 is formed on the blade surface 23. The recess 41 is arranged at a position nearer to the outer edge 26 than the inner edge 27 and is formed extending from one end 31 of the fan blade 21 to the other end 32 in the direction of a rotary axis of the fan. <P>COPYRIGHT: (C)2012,JPO&INPIT |
