| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a ventilation port capable of satisfying both a ventilation amount and a noise reduction effect. <P>SOLUTION: An indoor side is communicated with an outdoor side via a sleeve 30 provided in a wall 20 such as a wing wall. A ventilation hood 40 is provided on an outdoor side front face of the sleeve 30. A sound-proof material 50 such as glass wool is provided at 25 mm of thickness on a front face in an inner face of the ventilation hood 40. A rectangular shape of an outside air intake port of the ventilation hood 40 is formed into a rectangular shape specified by 80:125 of aspect ratio, and the sound-proof ventilation port 10 is thereby constituted to satisfy both securing of the ventilation amount and the noise reduction effect. <P>COPYRIGHT: (C)2008,JPO&INPIT |
