| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a water treatment system that, when abnormality occurs in an ultraviolet treatment device, quickly responds to prevent water from flowing into a purified water storage part from the ultraviolet treatment device.SOLUTION: In a water treatment system, when abnormality detection means 20 detects abnormality of an ultraviolet treatment device 2, an emergency shut-off valve 3 is operated to shut off a first passage 13, and an emergency open valve 5 is operated to open a second passage 14, whereby water is made to flow from the ultraviolet treatment device 2 into a wastewater storage part 12 to prevent the water from flowing into a purified water storage part 11. The emergency shut-off valve 3 is a weight type shut-off valve that shuts off the first passage 13 by the weight of a weight, and the emergency open valve 5 is a spring type open valve that opens the second passage 14 by an elastic energizing force of a spring.</p> |
