| 摘要 |
PROBLEM TO BE SOLVED: To provide a sprayer for simplifying a maintenance work, if the maintenance work such as one for washing the inside of a storage tank after completion of spray operation, washing water may be left in a discharge pump, although the left washing water may cause, if frozen, cracks in the individual portions of the discharge pump and although it is troublesome in operations and deteriorates the using facilities to turn ON and OFF the power supply switch while the storage tank being held empty.SOLUTION: In a power supply circuit 50 for a power supply to a discharge pump P, a maintenance switch 56 having a timer function is arranged in parallel with a power supply switch 53. When the maintenance switch 56 is turned on with the power supply switch being in the off-state, the discharge pump P is started for a predetermined time period by the timer function thereby to discharge the residual water. |
