| 摘要 |
PROBLEM TO BE SOLVED: To provide a slow chemical releasing device which has a valve to be automatically opened and closed by the pressure of flowing water, opens this valve at the time of water flowing to slowly release the chemical in a cartridge into the flowing water and prevents the useless leakage of the chemical into the water at the time of stopping the water. SOLUTION: The slow chemical releasing device which has the cartridge 10 for releasing the water soluble chemical, internally has a water flow passage and adds the chemical onto the flowing water passed through this water flow passage has the valve to close an aperture at the time of stopping the water and has a stopper 113 which holds the valve and is movable in the water flow passage. The device has an energizing means 115 for pressing this stopper 113 to the aperture. The stopper 113 moves and parts from the aperture 102 at the time of passing the water, thereby exposing the aperture 102 into the flowing water. |
