| 摘要 |
PROBLEM TO BE SOLVED: To provide a low noise axial flow fan motor reducing solid transmission noise generated by vibration of a motor or the like even under a condition where axial flow fan motors are built in various kind of devices, namely to reduce air propagation noise such as fluid noise or the like and solid transmission noise such as vibration of the axial flow pumps. SOLUTION: The axial flow fan motor has a plurality of openings on the bottom of venturi. If no opening is provided, large vibration is generated at a name plate and that may be expanded to noise and vibration problem. In this invention, air propagation noise and solid transmission noise can be reduced by providing a plurality of the openings 100 on the bottom 1 of venturi. COPYRIGHT: (C)2006,JPO&NCIPI
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