| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a combinational impeller easy in an accurate fixed position and combination, without causing deformation by increasing structural strength of an impeller and a base. Ž<P>SOLUTION: The combinational impeller includes a base and at least one impeller. The base is provided with a fluid guide surface provided with at least one fitting fixed position unit. The fitting fixed position unit comprises a large number of hooking grooves and one fitting section. The respective hooking grooves are communicated with the fitting section and the fluid guide surface. The impeller is provided with a fitting member fitted to and arranged in the fitting section of the base. A plurality of blades are annularly arranged on an outer peripheral surface of the fitting member in response to the respective hooking grooves of the base. The blade has a front edge being an air entering end and a rear edge. A section is formed between the inner edge of the blade and the outer peripheral surface of the fitting member, and a reinforcing piece is arranged in the section. The fitting member and the inner edge of the blade are continuously connected by the reinforcing piece. The reinforcing piece is fitted to and arranged in the hooking groove of the base. Ž<P>COPYRIGHT: (C)2010,JPO&INPIT Ž
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