Abstract: An apparatus main body having wheels and configured to run on a floor includes an electrolysis device, which electrolyzes a cleaning water to alkaline water and acid water. A pressurizing pump selectively sucks and pressurizes the alkaline water or acid water obtained by electrolysis by the electrolysis device. A spray nozzle mechanism sprays the cleaning water comprising the alkaline water or acid water pressurized by the pressurizing pump on the floor. A suction nozzle is mounted behind the spray nozzle mechanism in the apparatus main body and is opened to the floor. A suction mechanism sucks the cleaning water sprayed on the floor together with a contaminant. A reservoir tank, which is mounted in the apparatus main body, stores the sucked cleaning water together with the contaminant.

Abstract: An apparatus main body having wheels and configured to run on a floor includes an electrolysis device, which electrolyzes a cleaning water to alkaline water and acid water. A pressurizing pump selectively sucks and pressurizes the alkaline water or acid water obtained by electrolysis by the electrolysis device. A spray nozzle mechanism sprays the cleaning water comprising the alkaline water or acid water pressurized by the pressurizing pump on the floor. A suction nozzle is mounted behind the spray nozzle mechanism in the apparatus main body and is opened to the floor. A suction mechanism sucks the cleaning water sprayed on the floor together with a contaminant. A reservoir tank, which is mounted in the apparatus main body, stores the sucked cleaning water together with the contaminant.