Intake and Exhaust Method and A Structure Utilizing the Same

Abstract

An intake and exhaust structure includes an outer duct, an inner duct and an air-guiding cover. The outer duct has a first end and a second end. The inner duct has a first end, a second end and an intake air channel. The inner duct is disposed in the outer duct, and a circular air channel is defined between the inner and outer ducts. The air-guiding cover has an inner wall and an air inlet at two ends thereof, wherein the inner wall is coupled with the second end of the inner duct.

1 . An intake and exhaust method, comprising:
 an outer duct having a first end and a second end;   an inner duct having a first end, a second end and an intake air channel, wherein the inner duct is disposed in the outer duct, and a circular air channel is defined between the inner and outer ducts; and   an air-guiding cover having an inner wall and an air inlet at two ends thereof, wherein the inner wall is coupled with the second end of the inner duct;   wherein the first ends of the inner and outer ducts are connected to an interior space to provide communication between the intake air channel and the circular air channel.   
     
     
         2 . An intake and exhaust structure, comprising:
 an outer duct having a first end and a second end;   an inner duct having a first end, a second end and an intake air channel, wherein the inner duct is disposed in the outer duct, and a circular air channel is defined between the inner and outer ducts; and   an air-guiding cover having an inner wall and an air inlet at two ends thereof, wherein the inner wall is coupled with the second end of the inner duct.   
     
     
         3 . The intake and exhaust structure as claimed in  claim 2 , wherein the air-guiding cover further comprises an outer wall surrounding the inner wall and coupled with the second end of the outer duct. 
     
     
         4 . The intake and exhaust structure as claimed in  claim 3 , wherein the inner and outer walls of the air-guiding cover are coupled with the inner and outer ducts in a rotatable manner. 
     
     
         5 . The intake and exhaust structure as claimed in  claim 3 , wherein the air-guiding cover further comprises an air outlet between the inner and outer walls. 
     
     
         6 . The intake and exhaust structure as claimed in  claim 5 , wherein an air-blocking portion is arranged at one side of the air outlet where the air inlet of the air-guiding cover is. 
     
     
         7 . The intake and exhaust structure as claimed in  claim 2 , wherein the outer duct comprises a first outer tube and a second outer tube, and the air outlet has a windward opening and an air-guiding opening defined between the inner duct and the second outer tube. 
     
     
         8 . The intake and exhaust structure as claimed in  claim 2 , wherein the first ends of the inner and outer ducts are connected to an interior space, and the inner duct has an air-spreading member at the first end thereof. 
     
     
         9 . The intake and exhaust structure as claimed in  claim 8 , wherein the air-spreading member extends outwards beyond a cross-sectional range of the intake air channel of the inner duct.