| 摘要 |
PROBLEM TO BE SOLVED: To prevent proliferation of saprophytes in a distribution channel of drinking water and maintain a superior sanitary condition of drinking water.SOLUTION: A circulation flow passage is configured from a water-receiving vessel 7 for receiving drinking water in a raw water container 3, a raw water supply passage 10 for supplying the drinking water stored in the vessel to a cold water tank 2 by a pump 9, a first return pipe 26a and a second return pipe 26b which return the drinking water flowing through the raw water supply passage to the water-receiving vessel. A hot water tank 14 is provided in a midway of the first return pipe 26a and the second return pipe 26b, and heated water which is generated by heating the drinking water is supplied to the circulation flow passage via the hot water tank 14. The heated water is flowed through the water-receiving vessel 7 and so on and sterilized at a high temperature, whereby generation of saprophytes in the passage for drinking water can be obviated. |
