| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a ventilation device provided with a detachable bell mouth, and capable of surely mounting the bell mouth in mounting the bell mouth, and performing the ventilation without affected by a bell mouth mounting structure in demounting the bell mouth. <P>SOLUTION: This ventilation device comprises a cylindrical portion 5 inserted into a ventilating opening formed on a room wall 1, comprising a fan motor 5 having a high static pressure-type first fan, and defining a ventilation passage inside, a frame 7 extending to an indoor-side opening portion 6 of the cylindrical portion 5 and mounted on the room wall 1, a front panel 8 covering a front surface of the frame 7, and the detachable first bell mouth 9 positioned on the indoor-side opening portion 6 and guiding the air distributed to the fan motor 4. The indoor-side opening portion 6 has a circular conical surface 10 having an opening expanded toward an indoor side, an outer peripheral portion of the first bell mouth 9 comprises a joint face 11 internally kept into contact with the circular conical surface 10, and the first fan can be replaced by a high air volume-type second fan. <P>COPYRIGHT: (C)2009,JPO&INPIT |
