| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a piping structure provided with a drain promoting function capable of properly carrying out draining of piping interior while reducing size of the piping. <P>SOLUTION: The piping structure is provided with the pipe B for water passing attached with an opening and closing valve 8, and the filter F provided in a water passing direction upstream side of the opening and closing valve 8. It is provided with an erected piping part 7A formed by vertically erecting at least one portion from the filter F to the opening and closing valve 8 of the pipe B, and arranging the filter F in a position lower than the opening and closing valve 8, and a drain passage 3 for drain promotion of a groove shape or a hole shape with one end connected to a filter body part 1 to cause a capillary phenomenon to guide one part of water to a water passing direction upstream side of the filter body part 1 when a water film is formed in the filter body part 1 due to closing of the opening and closing valve 8, and the water is sealed in a water passing direction downstream side of the filter body part 1. <P>COPYRIGHT: (C)2007,JPO&INPIT</p> |
