Duct

Abstract

A duct including a duct body is disclosed. The duct is a hollow tube and includes an air channel and an exit end. The exit end has a windward portion and an air-guiding portion on two sides thereof.

1 . A duct comprising a duct body being a hollow tube, wherein the duct comprises an air channel and an exit end, and the exit end has a windward portion and an air-guiding portion on two sides thereof. 
     
     
         2 . The duct as claimed in  claim 1 , wherein the duct body further comprises a narrow portion. 
     
     
         3 . The duct as claimed in  claim 1 , wherein the duct body further comprises a first tube and a second tube coupled with the first tube via a sliding member. 
     
     
         4 . The duct as claimed in  claim 3 , wherein the sliding member is a ball bearing, a needle bearing, a sliding bearing, a magnetic suspension bearing, a hydraulic bearing or a tapered and cylindrical roller bearing. 
     
     
         5 . The duct as claimed in  claim 3 , wherein the first tube further comprises a pair of wings. 
     
     
         6 . The duct as claimed in  claim 5 , wherein the wings are aligned with the exit end. 
     
     
         7 . The duct as claimed in  claim 1 , wherein the exit end is formed as a cut-off portion. 
     
     
         8 . The duct as claimed in  claim 1 , wherein the exit end has an inclined periphery.