| 摘要 |
PROBLEM TO BE SOLVED: To provide an automatic vending machine for water which produces water matching a customer's preference by continuously or semicontinuously changing mineral concentration in water from mineral concentration in pure water to that in water of high hardness containing much mineral. SOLUTION: The automatic vending machine for water is provided with a function of injecting mineral into pure water produced by a pure water apparatus (1) while continuously or semicontinuously varying the amount of mineral components to be added by varying the number of pulses or the rotational frequency of a mineral injecting pump (4) with an electric signal from a desired concentration selector (6). COPYRIGHT: (C)2004,JPO
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