Air ventilation system for subway platform

Abstract

A ventilation system for a subway platform includes: an air supply duct through which air supplied to the interior of a subway platform flows; an exhaust duct through which air supplied to the outside of the subway platform flows; a plurality of air supply hoods that supply air in the air supply duct to the interior of the subway platform and are arranged to be apart from each other in a direction in which air flows through the air supply duct; and a plurality of exhaust hoods that exhaust air from the subway platform together with pollutants in the subway platform to the exhaust duct and are arranged to be apart from each other in a direction in which air flows through the exhaust duct, wherein the air supply hood is arranged to be inclined downward at an angle toward one side of the subway platform to supply air.

What is claimed is: 
     
         1 . A ventilation system for a subway platform comprising:
 an air supply duct through which air supplied to the interior of a subway platform flows;   an exhaust duct through which air supplied to the outside of the subway platform flows;   a plurality of air supply hoods that supply air flowing through the air supply duct to the interior of the subway platform and are arranged to be apart from each other in a direction in which air flows through the air supply duct; and   a plurality of exhaust hoods that exhaust air supplied to the interior of the subway platform by the air supply hood together with pollutants in the subway platform to the exhaust duct and are arranged to be apart from each other in a direction in which air flows through the exhaust duct,   wherein the air supply hood is arranged to be inclined downward at an angle toward one side of the subway platform to supply air.   
     
     
         2 . The ventilation system of  claim 1 , wherein the exhaust hood is arranged between one side of the subway platform and the air supply hood based on the air supply hood such that the air supplied by the air supply hood is exhausted after circulating with a trajectory along side and bottom surfaces of the subway platform. 
     
     
         3 . The ventilation system of  claim 1 , wherein the air supply hood comprises:
 a hood body connected to the air supply duct and defining an air supply port through which air flowing through the air supply duct is supplied to the interior of the subway platform at its front end; and   at least one air guide provided inside the hood body and guiding air supplied through the air supply port in a flow direction of air in the air supply duct and a direction opposite thereto.   
     
     
         4 . The ventilation system of  claim 3 , wherein
 the hood body is formed in a hollow shape in which a cross-sectional area gradually increases toward the air supply port, and   the at least one air guide comprises a plurality of air guides that are arranged to be apart from each other in the hood body to partition the inside of the hood body and the air supply port.   
     
     
         5 . The ventilation system of  claim 4 , wherein the plurality of air guides comprise:
 at least one reverse air guide extending downwardly inclined at an angle in a direction opposite to the flow direction of air in the air supply duct; and   at least one forward air guide extending downwardly inclined at an angle in the flow direction of air in the air supply duct.   
     
     
         6 . The ventilation system of  claim 5 , wherein
 the at least one reverse air guide is located relatively upstream in the flow direction of air in the air supply duct, and   the at least one forward air guide is located relatively downstream in the flow direction of air in the air supply duct.   
     
     
         7 . The ventilation system of  claim 6 , wherein the at least one reverse air guide comprises a plurality of reverse air guides, wherein the reverse air guide located upstream in the flow direction of air in the air supply duct among the reverse air guides has a relatively small angle in a direction opposite to the flow direction of air in the air supply duct compared to the reverse air guide located downstream in the flow direction of air in the air supply duct among the reverse air guides. 
     
     
         8 . The ventilation system of  claim 6 , wherein the number of the plurality of reverse air guides is greater than the number of the forward air guides.