Device and method for generating dry ice snow

A method for generating dry ice snow using a device comprising a rotating body mounted in a housing so that it can rotate around a rotational axis, wherein the rotating body exhibits at least one expansion chamber on the circumference of the rotating body, a feed line for introducing liquid carbon dioxide into the at least one expansion chamber, an inlet opening of the housing for introducing a gaseous mass flow into the at least one expansion chamber, and an outlet opening of the housing for dispensing the dry ice snow generated in the at least one expansion chamber from the housing, characterized in that

• the liquid carbon dioxide is introduced into at least one expansion chamber of a rotating body and expands in the process, so that dry ice snow is generated in the at least one rotation chamber, wherein the at least one rotating body is rotated around a rotational axis, and wherein the at least one expansion chamber is arranged on the circumference of the rotating body, and extends continuously along the rotational axis, and wherein a gaseous mass flow is introduced into the at least one rotation chamber, in the form of compressed air, so that the mass flow streams through the at least one expansion chamber at least in sections along the rotational axis, during which the dry ice snow generated in the at least one expansion chamber is entrained and ejected out of the at least one expansion chamber along the rotational axis, onto a surface to be cleaned.