PRESSURE DIFFERENCE SUPPRESSING DEVICE

To provide a pressure difference suppressing device that has a simple structure but can easily open and close the door both during normal operation and during flooding.SOLUTION: A pressure difference suppressing device 1 includes a first flap portion 3 that is openably and closably attached to an opening 2 provided so as to penetrate a partition wall 14 that partitions a first space 10 and a second space 20, and a second flap portion 5 that is openably and closably attached to a flap opening 4 provided so as to penetrate the first flap portion. The first flat portion has a configuration in which one end is rotatably supported on the peripheral edge of the opening on the first space side of the partition wall, and the other end is opened so as to allow the fluid to flow into the first space side, when pressure is applied. The second flap portion has a configuration in which the inflow and outflow of fluid are allowed all times through the flap opening.SELECTED DRAWING: Figure 1 【課題】簡易な構造でありながら、通常時も浸水時も扉を開閉し易い圧力差抑制装置を提供する。【解決手段】圧力差抑制装置１は、第１空間１０と第２空間２０とを区画する区画壁１４に貫通して設けられる開口部２に開閉自在に取り付けられる第１フラップ部３と、前記第１フラップ部に貫通して設けられるフラップ開口部４に開閉自在に取り付けられる第２フラップ部５とを備え、前記第１フラップ部は、前記区画壁の前記第１空間側における前記開口部の周縁部に回動自在に一方端が軸支され、圧力を受けると前記第１空間側への流動体の流入する許容するように他方端が開放される構成とされ、前記第２フラップ部は、前記フラップ開口部を通じて常時流動体の流入出を許容する構成とされていることを特徴とする。【選択図】図１