| 摘要 |
PURPOSE:To prevent air from leaking and shorten processing time in a silencing box in which it is connected between air conditioning ducts in an air conditioning apparatus and is connected to an air suction inlet or an air blowoff outlet, and in which air is led into a room on which a silencing material is applied and is silenced and is thereafter exhausted. CONSTITUTION:A silencing box is formed with a casing 17 synthesized by inserting a U-shaped second member 16 into a first plate material 11 including a folded part 15 on a tip end 14 having U-shaped opposite ends 12, and a cover 19 in which a frame member 21 is fixed to a cover member 20 to covering an opening part 10 in the casing 17. |
