| 摘要 |
PROBLEM TO BE SOLVED: To completely prevent water drops from adhering to a wall surface around a hood of a ventilating port by setting an inner diameter of a guide pipe of an outside hood to be larger in a predetermined millimeter unit than an outer diameter of a ventilation pipe, and constructing the structure such that the guide pipe of the outdoor hood encloses the outside of an opening in the ventilation pipe. SOLUTION: While the inside R of a room and the outside T of the same are communicated with each other by disposing a ventilation pipe 11 on an outer wall 10 while a hood 12 tar avoiding rainwater is disposed on the outside T, and a guide pipe (connection pipe) 14 provided on the hood 12 and the ventilation pipe 11 are connected with each other to exhaust indoor air to the outside. Herein, the guide pipe 14 encloses an outdoor side end of the ventilation pipe 11 from the outside and is fitted to the ventilation pipe 11. An inner diameter of the guide pipe 14 is set to be larger than an outer diameter of the ventilation pipe 11 such that the ventilation pipe 11 can be inserted into it. With such a joint structure, drain flowing from the indoor side R to the outdoor side T falls down on the guide pipe 14 without staying at a connection step part of the pipe and is discharged to the outside of the room through the hood 12. |
