公开(公告)号：US20100099348A1

公开(公告)日：2010-04-22

申请号：US12546697

申请日：2009-08-25

申请人： Jen-Chi WU ,  Shih-Wei WU

发明人： Jen-Chi WU ,  Shih-Wei WU

IPC分类号： F24F7/00

CPC分类号： F24F7/013 ,  F04D25/14 ,  F24F2007/001

摘要： A backflow prevention device is connected to a bathroom air duct and includes a case having two opposite gas inlet-end opening and gas outlet-end opening; a gas inlet-end unit and a gas outlet-end unit respectively mounted to and communicating with the gas inlet-end opening and the gas outlet-end opening; and at least one backflow prevention unit mounted in the case. The backflow prevention unit includes a frame and a plurality of baffle plates pivotally mounted in the frame. The baffle plates are arranged in the frame from top to bottom to overlap with each other, and can be pivotally turned only in one way toward the gas outlet-end opening to an open position. Thus, gas in a bathroom is allowed to flow from the gas inlet-end opening to the gas outlet-end opening, while gas with bad odor in a public pipe shaft is prevented from flowing back into the bathroom.

摘要翻译： 防回流装置连接到浴室空气导管，并且包括具有两个相对的气体入口端开口和气体出口端开口的壳体; 分别安装到气体入口端开口和气体出口端开口并与气体入口端开口和气体出口端开口连通的气体入口端单元和气体出口端单元; 以及安装在所述壳体中的至少一个防回流单元。 防回流单元包括框架和枢转地安装在框架中的多个挡板。 挡板从上到下布置在框架中以彼此重叠，并且可以仅以一种方式枢转地转向气体出口端开口到打开位置。 因此，允许浴室中的气体从气体入口端开口流到气体出口端开口，同时防止在公共管轴中具有恶臭的气体回流到浴室中。