| 摘要 |
A passive building vent disposed in an outside vertical building wall, communicates between the outside atmospheric air and the confined air within the building, via a housing forming an air mixing chamber with a passageway disposed therethrough. A movable membrane is mounted within the housing at one end of the passageway, the other end of the passageway communicates with the confined air and is disposed outside of the vertical building wall. The membrane has a closed position, substantially blocking the passageway and an open position, permitting the free flow of air therethrough. The air passage permits the flow of outside air into the air mixing chamber. A venting device communicates with the air mixing chamber permitting the flow of air to exit from the air mixing chamber. A deflector is mounted on the housing proximate the venting device and communicates with the air mixing chamber. The deflector is inclined relative to the membrane and interposes between the membrane and the venting device wherein the flow of outside air entering through the air passage impinges upon the deflector and is forced to exit through the venting device providing a pressure differential such that the membrane is caused to move to its open position permitting the free flow of the air through the passageway into the air mixing chamber for venting the building.
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