Blower and ventilating system

Abstract

Provided is a blower installed at a manhole opening, with which it is possible to facilitate an entry or an exit of a worker or an import or an export of an article. The present invention provides a ventilation system comprising a frame and a single or a plurality of airflow generation means arranged at the frame, a direction of an airflow is adjusted so that the airflow generated from the airflow generation means flows along with a virtual axis penetrating a virtual surface which the frame is regarded as to periphery, and the airflow flows while swallowing up the surrounding air of the virtual axis, and an air volume more than two times of total fluid volume of the airflow is generated.

1 . A blower comprising a frame and a single or a plurality of airflow generation means arranged at said frame, wherein a direction of an airflow is adjusted so that said airflow generated from said airflow generation means flows along with a virtual axis penetrating a virtual surface which said frame is regarded as periphery, and said airflow flows while swallowing up the surrounding air of said virtual axis, and an air volume more than two times of total fluid volume of said airflow is generated. 
     
     
         2 . A blower according to  claim 1 , wherein
 said virtual axis vertically intersects said virtual surface at a center point of the same.   
     
     
         3 . A blower according to  claim 1 , wherein said plurality of airflow generation means are arranged at said frame, and a direction of each airflow is adjusted so that each airflow generated by said plurality of airflow generation means flows toward one point on said virtual axis. 
     
     
         4 . A blower according to  claim 3 , wherein said plurality of airflow generation means are arranged at a symmetric position having a center which is an intersection point of said virtual surface and said virtual axis. 
     
     
         5 . A blower according to  claim 1  comprising an installation tool for installing said airflow generation means on said frame, wherein said installation tool may include an angle adjustment mechanism for adjusting an angle of said airflow generation means against said virtual surface. 
     
     
         6 . A blower according to  claim 1 , wherein an incident angle of said airflow against said virtual surface becomes 16 to 24 degrees. 
     
     
         7 . A blower according to  claim 1 , wherein said airflow generation means comprises a generation source of said nozzle comprises a conical part for converging the airflow sent from said generation source, and a cylindrical part positioned at a top end of said conical part. 
     
     
         8 . A blower according to  claim 7 , wherein said injection nozzle comprises a direction adjustment mechanism for adjusting a direction of said airflow. 
     
     
         9 . A blower according to  claim 1 , further comprising a fixing tool for fixing said frame to the manhole opening. 
     
     
         10 . A blower according to  claim 1 , further comprising a blockage member for blocking a gap between a circumferential area of the manhole opening and said frame. 
     
     
         11 . A blower according to  claim 1 , further comprising an airflow reflection member which is installed at the manhole opening, is flexible member dropping to a lower part in the manhole, and converts a direction of airflow from a vertical direction to a horizontal direction. 
     
     
         12 . A blower according to  claim 1 , further comprising an additive supplying means for supplying one or more additives selected among an aromatic, water or steam to an air inflowed into said airflow generation means. 
     
     
         13 . A ventilation system using the blower according to  claim 1 , wherein said blower is installed in an entrance or an exit of a pipe conduit, a pipe line or a path, or at least one of an entrance, an exit or a manhole of a manhole connected to the pipe conduit or the pipe line, or the manhole. 
     
     
         14 . A ventilation system according to  claim 13 , comprising
 an airflow direction conversion means for converting a direction of the airflow from a vertical direction to a horizontal direction, or from the horizontal direction to the vertical direction at an entrance or an exit to which said blower is installed, or at a bottom of the manhole.   
     
     
         15 . A ventilation system according to  claim 14 , wherein
 said airflow direction conversion means is an airflow reflection plate for converting a direction by reflecting said airflow.   
     
     
         16 . A ventilation system according to  claim 14 , wherein
 said airflow direction conversion means comprises a second airflow generation means for generating a second airflow different from the airflow from said blower, and said second airflow is joined in a different direction from the airflow from said blower and the direction of said airflow is converted.   
     
     
         17 . A ventilation system according to  claim 13 , wherein an exhaust device is installed on at least one of an entrance, an exit or a manhole which is different from an entrance, an exit or a manhole on which said blower is installed. 
     
     
         18 . A ventilation system according to  claim 17 , wherein
 said exhaust device is installed on a first entrance, exit or manhole which are located downstream relative to the entrance, the exit or the manhole on which said blower is installed.   
     
     
         19 . The ventilation system according to  claim 17 , comprising an airflow direction conversion means for converting a direction of the airflow from a vertical direction to a horizontal direction, or from the horizontal direction to the vertical direction at an entrance, an exit or a bottom of a manhole to which said exhaust device is installed.