Abstract: The invention proposes a device for nebulizing or spraying or injecting liquid into an operating chamber, wherein at least one multi-jet nozzle (1) having at least two jet ducts (2, 3) for generating at least two liquid jets which at least partially impinge on one another in an impingement zone (7), such that a fan-shaped jet can substantially be generated, the extent of which in a fan plane is greater than, or at least twice as great as, the extent in a transverse direction with respect to said fan plane, by means of which device a highly stable and controlled fan-shaped jet is generated.