| 摘要 |
PROBLEM TO BE SOLVED: To enable manufacture of a ventilator including a resonance silencer at low cost, the ventilator being placed in a hole provided in a wall of a house and used for exhausting dirty air in a room to the outdoor.SOLUTION: A cavity 10 is configured with a wall 8 on which a ventilator 1 is mounted, a bellmouth 6, and a flange 7. Accordingly, a resonance silencer made of a communication hole 11 and the cavity 10 does not require that a member is added to form the cavity 10, and the ventilator can be thus obtained capable of achieving resonance silencing at low cost. |
