Abstract: An air-flushing device cleans a cleaning object by air-blowing to the object from a nozzle. The air-flushing device outputs a pressure value changing according to electromagnetic valve's opening/closing, and controls the valve's opening/closing based on two reference values of an upper-limit setting value and a lower-limit setting value lower than that. The air-flushing device closes the valve if the pressure value changes from lower than the upper-limit setting value to that or higher, and opens the valve if the pressure value changes from higher than the lower-limit setting value to that or lower.

Abstract: A cleaning position checking device, configured to be provided between a fluid supply section and a nozzle having a hole through which a fluid supplied from the fluid supply section is ejected so that a cleaned object is cleaned with the fluid, for checking a position which the fluid to be ejected is to reach, having a joint member having a tubular shape, and having an inlet part through which the fluid flows in the joint member, and an outlet part through which the fluid flows out of the joint member, and a holder having a first opening configured to have a light source disposed therethrough, and a light source section-provided-space formed in the holder configured to hold the light source section therein, so as to allow light to be emitted toward the outlet part.

Abstract: An air-flushing device cleans a cleaning object by air-blowing to the object from a nozzle. The air-flushing device outputs a pressure value changing according to electromagnetic valve's opening/closing, and controls the valve's opening/closing based on two reference values of an upper-limit setting value and a lower-limit setting value lower than that. The air-flushing device closes the valve if the pressure value changes from lower than the upper-limit setting value to that or higher, and opens the valve if the pressure value changes from higher than the lower-limit setting value to that or lower.