F - Mech Eng,Light,Heat,Weapons – 24 – F
Patent
F - Mech Eng,Light,Heat,Weapons
24
F
F24F 13/24 (2006.01) F15D 1/04 (2006.01) F24F 11/04 (2006.01) F24F 11/047 (2006.01) F24F 7/00 (2006.01)
Patent
CA 2300441
In a ventilating system with an air passage communicating between an outdoor side and an indoor side, it is an object to preventing noise entering from the outdoor side and sound escaping from the indoor side and to preventing outdoor air invading at wind speed over a specific value. In an air passage (14) a part of which is defined by a hexagonal frame main body (9) whose cross section is reduced gradually from outdoor side (2) to indoor side (3), a sound deadening member which is a hexagonal sound absorbing cone member (20) comprising an outside sound deadening portion which is a first hexagonal cone (21) whose apex (24) is directed to the outdoor side (2) and an inside sound deadening portion which is a second hexagonal cone (22) whose apex (25) is directed to the indoor side (3) is provided, so that cross section of the air passage (14) is reduced gradually from the apex (24) of the first hexagonal cone (21) to a bottom surface portion (27) thereof and increased gradually from the bottom surface portion (27) thereof to the apex (25) of the second hexagonal cone (22). Furthermore, an opening and shutting mechanism (50) is provided in the air passage (14) to close the air passage (14) when wind speed of the outdoor side (2) exceeds a specific value.
Goudreau Gage Dubuc
Oriken Co. Ltd.
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