| 摘要 |
<p>PROBLEM TO BE SOLVED: To reduce the turbulence noises at the time of the blowout air from a blowout port passing a blowout guard. SOLUTION: The front of a casing 5 is provided with a blowout panel 6 which has a circular blowout port 7 corresponding to a blower 3, and a blowout guard 8 which covers this blowout panel 6. The area of the blowout guard 8 is larger than the blowout area of the blowout port 7. The interval d1 between the inside of the blowout guard 8 and the surface of the blowout panel 6 is kept roughly constant in a vertical direction. But, it becomes larger gradually as it goes away in right and left direction from the center of the blowout port 7. From this matter, the flow of the blowout air from the blowout port 7 passes the blowout guard 8 of area larger than the blowout area of the blowout port 7 while spreading in right and left direction where the interval d1 between the inside of the blowout guard 8 and the surface of the blowout panel 6 is larger than it, so the flow velocity of the blowout air at passage of the blowout guard 8 can be dropped than conventional one.</p> |
