| 摘要 |
PROBLEM TO BE SOLVED: To solve the problems of wastage, waste of resources and increase of garbage due to abandonment of a used cartridge every time of changing the cartridge when the cartridge containing a mixing agent is a changing type. SOLUTION: The cartridge 10 supplying a mixing agent solution to a water supply path 4 is constituted of a cartridge body 11 and a cap 12 detachably attached to the cartridge body 11. When a filled agent is consumed and used up, the cap 12 detached and the mixing agent 15 is filled to the cartridge body 11. |
