| 摘要 |
The invention aims to provide a water supply device which allows easy setting of parameters required by end pressure constant control. A target pressure setting unit of the water supply device enables a motor to run at a variable speed by a variable speed control unit. When the pressure detected by a pressure detection unit reaches a set first target pressure, and the vale of the current detected by a current detection unit reaches a rated value of the current stored in a storage unit under the rotating speed of the motor in this case, the rotating speed of the motor is stored as a first rotating speed via the storage unit, and is capable of running at a variable speed via the variable speed control unit. When the pressure detected by the pressure detection unit reaches a second target pressure which is set lower than the first target pressure, the rotating speed of the motor is stored as a second rotating speed via the storage unit. A relational expression representing the relationship between the amount of used water and the target pressure is generated by using the first target pressure and the first rotating speed and the second target pressure and the second rotating speed. |
