| 摘要 |
PROBLEM TO BE SOLVED: To smoothly drain a large quantity of washing water which is caused when the inside of a bathtub pan is washed. SOLUTION: The bathtub pan comprises a bathtub pan drain receiving port 12 connected with a bathtub pan drain port 5, a bathtub draining cylindrical part 13 disposed in the receiving port 12 to connect a cylinder inside 13d with a bathtub drain port 3, a bathtub pan drain passage 16 extended from the receiving port 12 to a collective drain passage 15, and a bathtub drain passage 17 extended from the cylinder inside 13d to the collective drain passage 15. The draining cylindrical part 13 includes a check valve 20 which is generally closed to inhibit the passage of water from the cylinder inside 13d of the cylindrical part 13 to the receiving port 12, and allows the passage of water from the receiving port 12 to the cylinder inside 13d of the cylindrical part. COPYRIGHT: (C)2009,JPO&INPIT
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