| 摘要 |
PROBLEM TO BE SOLVED: To implement the cooling which is suitable for the structure to be cooled with a micro-miniature size which is applicable for micro-miniature equipment such as a cellular phone in high cooling efficiency and the wider range. SOLUTION: A fan motor is comprised of a motor 20 in which a rotary shaft is deduced in both sides of the axial direction; a pair of centrifugal fan impellers 30, 40 which are connected to the end of the rotary shafts, and rotate together with the rotary shafts; and a casing 10 covering the motor and both the fan impeller, and forming a suction port and an exhaust port. A pair of the fan impellers are set so that the axial length of each impeller blade is not less than the outside diameter of a circle composed of each impeller blade, respectively. In the casing, the suction port is formed at the opposed side to an opening which is formed at the opposite side of an end wall of both the fan impellers, and the exhaust port is formed opposed to the periphery of both the fan impellers. COPYRIGHT: (C)2005,JPO&NCIPI
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