| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a backflow preventing structure for a cooling fan preventing fluid in a system from back flowing outside the system and preventing an outgoing radiation efficiency from lowering. <P>SOLUTION: There are provided a housing 21, a fan wheel, and two or more shielding members 231, 232. The housing 21 is equipped with an entrance and an exit. At an exterior side of the housing 21 there is provided an interlocking device 24 in which a sliding member 242 is provided to be slidable. An upper shielding member 231 is linked with the sliding member 242 through a supporting member 27, and a lower means member is linked with the sliding member 242 through a connecting member 26. In operating the cooling fan, the shielding member 231 is while being opened by a dynamic pressure of cooling liquid sent by the cooling fan. When an operation of the cooling fan is stopped, the shielding member 231 turns in the direction closing the exit by an internal pressure and a gravity action caused by other fans, and accordingly the sliding member 242 is pushed and sent through the supporting member 27, and another shielding member 232 is pulled up through the connecting member 26 to close the exit, and a backflow of the cooling liquid is prevented. <P>COPYRIGHT: (C)2007,JPO&INPIT</p> |
