| 摘要 |
PROBLEM TO BE SOLVED: To form a blade type impeller part in a thickness shape not having recess, and promote lightening of a weight by arranging a plurality of blade type impellers around a hub, and connecting the whole of a hub and an inner part of the impeller through a hollow structure. SOLUTION: An impeller 1 for an air blower is formed by arranging a plurality of blade type impellers 3 around a cylindrical hub 2. A center boss 4 for fixing a heater is fixed to a shaft of a motor, a fan is rotated to blow wind. The whole of the hub 2 and an inner part of the impeller 3 are connected to each other through a hollow structure. A balance of the impeller 1 for an air blower is regulated by attaching a screw having a suitable weight to a boss 6 for fixing the screw. The forming material of the impeller 1 is selected from either one of alloy resin material of polypropylene resin, acrylonitrile.styrene resin, acrylonitrile.ethylene propylene-diene.styrene resin, or acrylonitrile.styrene.acrylic acid ester resin.
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