| 摘要 |
PROBLEM TO BE SOLVED: To provide a drainage device which prevents abnormal sound, when sucking air from a drainage port or an overflow hole of a wash bowl, with an air sucking place facing the indoor side from being sounded to the indoor side to be large noise. SOLUTION: The drainage device comprises the drainage port 3 and the overflow hole 4 of a vessel body 2 with a cabinet 1, a drainage path 5 which is arranged in the cabinet 1 and is connected from the drainage port 3 to a sewerage pipe, an overflow path 6 which is arranged in the cabinet 1 and is connected from the overflow hole 4 to the drainage path 5, and a drainage trap 7 provided with sealing water 8 in the drainage path 5. An air ventilation pipe 9 is formed at an upper stream than the sealing water 8 in the drainage trap 7, and one end of the air venting pipe 9 is arranged in the drainage path 5 and the other end is arranged outside the drainage path 5 inside the cabinet 1. COPYRIGHT: (C)2007,JPO&INPIT
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