Patent ID: 8726683

Claim:
An apparatus for removing ice layers, snow layers and/or dirt layers from rotor blades of axial fans in a cooling installation for refrigerating and/or freezing products, comprising: at least one nozzle arranged on a suction side of the rotor blades, the at least one nozzle supplied with a substance to produce a gas cleaning jet, and adapted to coact with the cooling installation during operation for producing gas cleaning jet which is arranged in a vicinity of and directed to the rotor blades within certain time intervals, at least one other nozzle arranged a pressure side of the rotor blades, wherein each of the nozzles is aligned such that the gas cleaning jet produced by the at least one nozzle is directed toward surfaces of the rotor blades, and wherein the gas cleaning jet comprises gas selected from the group consisting of nitrogen, carbon dioxide, and mixtures of nitrogen and cargon dioxide, and comprises a momentum that separates and transports away said layers on the surfaces of the rotor blades.