| 摘要 |
A bad smell backflow preventive apparatus is provided the reverse current of the bad smell is minimized even when drainage gets accomplished. A bad smell backflow preventive apparatus comprises an opening/closing plate(30) having the openness to one-way, a hinge shaft(S1) in which both ends is axis-connected with the drain inner wall of both side, a restoring device which gives the force of restitution so that the top body is maintained closed. The restoring device comprises a spring installed between the top and bottom body. |
