| 摘要 |
PROBLEM TO BE SOLVED: To provide a water purifying apparatus reducing an enormous stress to equipment and each of components, which in turn, capable of increasing economy by lengthening a life of not only each part but also the whole equipment, and its control method. SOLUTION: A closed type buffer tank BT is connected to a raw water supply passage 11. A mixed water supply passage (served also as a raw water supply passage) 12 between the buffer tank BT and a reverse osmosis membrane RO is fitted with a pump P. In the buffer tank BT, titanium oxide is coated and an UV ultraviolet bactericidal lamp is embedded. Outside the buffer tank BT, a metal-made fin is attached and a cooler C is included. The reverse osmosis membrane RO is provided with a permeate circulation passage 22b connected to the buffer tank BT so as to circulate the permeate passing through the membrane to the water-intake side of the reverse osmosis membrane and a concentrated water circulation passage 32b connected to the buffer tank BT is provided so as to circulate the concentrated water to the water-intake side of the reverse osmosis membrane RO. COPYRIGHT: (C)2007,JPO&INPIT
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