The present invention relates to a nozzle arrangement (10) for a floor cleaning device (100), comprising a nozzle housing (28); a brush (12) rotatable about a brush axis (14), wherein the brush (12) is partially surrounded by the nozzle housing (28) and protrudes from a bottom side (30) of said nozzle housing (28), said brush (12) being provided with brush elements (16) for picking up dirt and/or liquid particles (22, 24) from a surface to be cleaned (20) during the rotation of the brush (12), and a protection assembly (32) for preventing obstacles (40) from getting sucked into the nozzle housing (28) or wrapped around the brush (12), wherein said protection assembly (32) is arranged within the nozzle housing (28) and comprises a plurality of spaced apart ribs (34) that extend at least partly through the brush (12), wherein a suction channel (42) is defined between a back end (44) of the ribs (34) and an opposite inner wall element (46) of the nozzle housing (28), wherein said back end (44) of the ribs (34) is facing away from the brush axis (14) and said inner wall element (46) is facing towards said back end (44) of the ribs (34) and spaced apart from said back end (44), and wherein the brush elements (16) extend at least partly into the suction channel (42) during the brush's rotation.