| 摘要 |
PROBLEM TO BE SOLVED: To provide a water flow switch device which is not turned on with a small flow rate of water and is surely turned on at a point of time when water flows at a desired flow rate. SOLUTION: A water flow switch 102 is made that having a first flow passage 122 for diverting a part of a main flow passage 125, and a second flow passage 124 for bypassing the other water in the main flow passage 125 from the first flow passage 122. On the first flow passage 122, a water flow switch 128 is installed. And the flow switch 128 is provided with a resistance plate 130 arranged crossing the first flow passage 122 and opened by action of the water flow when the water flow of the set flow rate is generated in the first flow passage 122, a magnet 132 fitted to the resistance plate 130, and a reed switch 134 provided on the outer surface of a tubular body 120 forming the first flow passage 122 inside and turned on opposite to the magnet switch 132 when the resistance plate 130 is opened. |
