Fan capable of resisting reversed flow

Abstract

A fan capable of resisting reversed flow includes a frame body, a fan wheel and at least two baffle parts. The frame body has an inlet and an outlet and provides at least an actuating device at the outlet side. The fan wheel is rotationally attached to the inner side of the frame body and provides a hub and a plurality of fan blades extending outward radially along the periphery of the hub. One of the baffle parts is pivotally connected to the outlet side of the frame body and the first baffle part connecting with the actuating device. When the fan stops running, the other baffle part, which is without connecting with the actuating device, pushes the slide element of the actuating device to slide for the baffle part closing the outlet.

1 . A fan capable of resisting reversed flow, comprising: 
 a frame body, having an inlet and an outlet and providing at least an actuating device;    a fan wheel, being rotationally attached in the frame body and providing a hub and a plurality of fan blades extending outward radially along the periphery of the hub; and    at least a first and second baffle parts, being pivotally connected to the outlet side of the frame body and the first baffle part connecting with the actuating device.    
   
   
       2 . The fan capable of resisting reversed flow as defined in  claim 1 , wherein the actuating device further comprises a slide rail and a slide element wit the slide rail being fixedly attached to the frame body and the slide element hooking the slide rail.  
   
   
       3 . The fan capable of resisting reversed flow as defined in  claim 1 , wherein the second baffle part at least has a support part capable of pushing the actuating device to slide.  
   
   
       4 . The fan capable of resisting reversed flow as defined in  claim 2 , wherein the slide element is connected to the first baffle part with at least a link element.  
   
   
       5 . The fan capable of resisting reversed flow as defined in  claim 2 , wherein the frame body has a groove to receive the slide rail.  
   
   
       6 . The fan capable of resisting reversed flow as defined in  claim 5 , wherein the slide element has a receiving part connecting with link element.  
   
   
       7 . The fan capable of resisting reversed flow as defined in  claim 1 , wherein a gross area of the two baffle parts is at least equal to the cross section area of the outlet.  
   
   
       8 . The fan capable of resisting reversed flow as defined in  claim 1 , wherein a plurality of connecting parts corresponding to the baffle parts.  
   
   
       9 . The fan capable of resisting reversed flow as defined in  claim 8 , wherein each of the connecting parts has a through hole.  
   
   
       10 . The fan capable of resisting reversed flow as defined in  claim 9 , wherein each of the baffles has a protrusion part joined to the through hole of the connecting part respectively.