| 摘要 |
PROBLEM TO BE SOLVED: To provide a tank unit having a small arranging area. SOLUTION: A tank unit 20 is integrated with acidic and alkaline water tanks 21, 22 respectively storing acidic water and alkaline water and having an oblong shape in a plan view, an axially long acidic water pump motor 23 consisting of a pump P sending and supplying acidic water in the acidic water tank 21 under pressure and the motor M driving the pump P and having them in a coaxially arranged state and an axially long alkaline water pump motor 24 consisting a pump P sending and supplying alkaline water in the alkaline water tank 22 under pressure and having them in a coaxially arranged state. Both tanks 21, 22 are parallelly arranged in a state laterally displaced by predetermined quantity to ensure spaces S1, S2 on one side of the acidic water tank 21 and on the other side of the alkaline water tank 22 and the respective pump motors 23, 24 are arranged in the spaces S1, S2 so that the axial direction of them becomes longitudinal.
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