Abstract: Cleaner liquid flow passages for discharging cleaner liquid from a rotatable brush unit are formed in a rotatable brush unit. The cleaner liquid flow passages are formed as passages wherein the cleaner liquid fed to a hollow portion in a rotary shaft flows to openings in brush cleaner circular plates via lateral grooves provided around the outer circumference of a core roller and along the axial direction. A cleaner liquid fed to discs from a cleaner nozzle contains dirt when the discs are cleaned and the dirt is sucked into the cleaner liquid passages and the dirt is discharged from the rotatable brush unit.

Abstract: The present invention provides a disc drying device and a disc drying method that allow simultaneous and quick drying of plural discs by a batch process and realize miniaturization of the device. In the present invention, plural discs arranged along a single axis are simultaneously chucked at outer peripheries thereof so that central openings of the discs internally form a space; plural nozzles are disposed in the space so as to supply hot water from inner peripheral surfaces of two sides of each of the discs to heat the discs with the hot water; and the discs are simultaneously rotated to thereby move the hot water from inner peripheries to outer peripheries of the discs and discharge the hot water outwardly of the outer peripheries by centrifugal force. The discharged hot water flows through valley grooves provided in inner wall surfaces of a water receiving cover to the lower side of the discs to be discharged to the outside.