A hydrodynamic nozzle comprising a nozzle body having a first, forward end and a second, rear end, in the rear end a section-wise centrally located intake for rinsing water, internal rinsing water channels by which rinsing water is directed from the rinsing water intake to multiple rinsing water discharges mouthing in the rear end of the nozzle body in a radially outer region with respect to the rinsing water intake. The hydrodynamic nozzle has a passage for air extending through the nozzle body, said air passage connecting an air intake, mouthing in the forward end of the nozzle body, to an air discharge mouthing in the rear end of the nozzle body, wherein the air discharge is defined partly through an outer wall located radially inside the rinsing water discharges, and partly through an inner wall located radially outside the rinsing water intake.