| 摘要 |
PROBLEM TO BE SOLVED: To provide a water supply device capable of continuing operation while preventing no-discharge operation of a pump. SOLUTION: This water supply device provided with the pump 3 and an inverter 2 for supplying electric power to the pump 3 and controlling rotation speed of the pump 3 is provided with a reference current value table 20 relating rotation frequency of the pump 3 to a reference current value which becomes a criterion for judging no-discharge operation in the rotation frequency, a frequency detector 21 detecting rotation frequency of the pump 3, a reference current value acquisition device 22 acquiring a reference current value corresponding to the rotation frequency detected by referring to the reference current value table 20, a current detector 23 detecting a current value of the pump 3, and a comparator 24 comparing the detected current value with the reference current value. |
