| 摘要 |
PROBLEM TO BE SOLVED: To provide a high-pressure washing device not requiring application of load to a high-pressure pump during suspension of injection of a jet gun nozzle, and capable of rapidly re-injecting wash water when the injection is resumed.SOLUTION: A high-pressure washing device includes: a check valve 40 provided in a second water flow path 12 from a change-over valve 20 to a sub-hose 5; a first pressure sensor 71 for detecting the pressure of the second water flow path 12 downstream side of the check valve 40; and control means 81 for opening/closing an on-off valve 30 on the basis of a detection value of the first pressure sensor 71. In the control means 81, the on-off valve 30 is opened when the detection value at the first pressure sensor 71 reaches a preset reference value. |
