PROBLEM TO BE SOLVED: To provide a ventilation booth which can be switched between positive pressure and negative pressure without upsizing a fan filter unit for acting negative pressure or positive pressure.SOLUTION: The ventilation booth includes an enclosure body for covering a head side area of a bed face and exposing the residual part of the bed face and a fan filter unit for sucking air from the enclosure body or supplying air to the enclosure body to hold the inside of the enclosure body at negative or positive pressure. The unit is equipped with a housing with a suction opening for sucking air on one of mutually opposing faces and a blowout hole for blowing out air on the other of mutually opposing faces, and a filter disposed across an air passage in the air passage communicating the both openings in the housing to purify the air from an air source for generating air flow to the blowout opening from the suction opening and from the suction opening. The blowout opening and the suction opening of the housing are selectively and detachably connected to an attaching opening set on the enclosure body via a connection means.COPYRIGHT: (C)2011,JPO&INPIT【課題】陰圧又は陽圧を作用させるファンフィルタユニットの大型化を招くことなく、陽圧及び陰圧の切り替え使用可能な換気ブースを提供する。【解決手段】ベッド面の頭側領域を覆い該ベッド面の残部を露出させる包囲体と、該包囲体内を陰圧又は陽圧に保持すべく包囲体内から空気を吸引し又は包囲体内に空気を供給するファンフィルタユニットとを含む換気ブース。前記ユニットは、互いに対向する面の一方に空気を吸い込むための吸入開口が設けられ互いに対向する面の他方に空気を吹き出すための吹出開口が設けられたハウジングと、該ハウジング内で前記両開口を連通する空気通路に該空気通路を横切って配置され、吸込開口から吹出開口へ向けての空気流を生成するための送風源及び吸込開口からの空気を浄化するためのフィルタとを備える。ハウジングの吹出開口及び吸入開口は、包囲体に設けられた取付け開口に接続手段を介して選択的に取り外し可能に接続される。【選択図】図1
