| 摘要 |
PROBLEM TO BE SOLVED: To provide a fan having resin blades equipped with excellent durability and cooling performance by preventing stress concentration while the fan is in rotation and cracking due to stress generated by a thermal contraction of the material. SOLUTION: The fan is constituted of resin blades installed on a metal disc independently, wherein a spider part made of metal formed separately is attached to the disc by welding, rivets, bolts, etc., and the blades are integrally formed with the spider part, and thus the fan can be manufactured at a low cost and be equipped with an excellent durability and cooling performance.
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