| 摘要 |
PROBLEM TO BE SOLVED: To produce water having a desirable effect and performance on the hair, skin, or the like by suitably mixing water which have passed through cation exchange resin the end of whose functional group is sodium, cation exchange resin of hydrogen, and anion exchange resin of hydroxyl group respectively to control pH and hardness of the mixed water. SOLUTION: City water fed as raw water is distributed to respective pipelines by a branch valve. The distribution to the pipelines is done by suitably operating the branch valve by a user. That is, city water to be fed as raw water is divided into parts passing through cation exchange resin the end of whose functional group is sodium type, cation exchange resin of hydrogen type, anion exchange resin of hydroxyl type, and a city water/raw water bypass for causing city water to flow as it is without treating any longer respectively through pipelines by the command from a control panel. As a result, soft water of neutral pH, soft water of weak acidic pH, water of alkaline pH, and city water/raw water can be used according to the appropriate use object to the user. |
