| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a ventilation device of high work efficiency, capable of smoothly sucking a harmful gas generated during work and discharging the same to the external without diffusing the harmful gas, and further easily installed and moved. <P>SOLUTION: This ventilation device includes: an upper hood 3 supplying laminar flow 2; a lower hood 6 which is positioned below the upper hood 3, whose surface is recessed to be used as a working space 4, and which is provided with a suction opening 5 on the recessed surface; an exhaust box 7 disposed on the upper hood 3; and a wall body 8 disposed between the lower hood 6 and the upper hood 3 and supporting the upper hood 3. The exhaust box 7 above the wall body 8 and the lower hood 6 are connected by a duct 9 along the wall body 8, and the harmful gas flowing above the working space 4 of the lower hood 6 is guided to the suction opening 5 as it is by the laminar flow 2 vertically flowing down from the upper hood 3, to be sucked into the lower hood 6, and discharged to the external from the exhaust box 7 through the duct 9 along the wall body 8. <P>COPYRIGHT: (C)2012,JPO&INPIT |
