Disclosed is a novel air blower for a unit cooler installed inside a unit cooler, preventing a blowing duct from being crushed or damaged easily by an external shock, blowing cooling air to a distant location by discharging cooling air generated by the unit cooler at high pressure, and having enhanced reliability since wires connected to motors comprised in a commercial heater and a blowing device installed on an outer periphery of the blowing duct are configured not to be separated by vibration from a driving motor. The air blower for a unit cooler of the present invention comprises: the blowing duct having a cylindrical shape and a flange with fastening holes, wherein the fastening holes are provided on outer sides of a front end and a rear end; a bracket fixed to a rear inner side of the blowing duct; the motor installed on the bracket and driving in a predetermined direction when an electric current is applied; and a blowing fan fixed to a front end of the rotary shaft in the motor and rotating to discharge cooling air generated by the unit cooler to an outer front end of the blowing duct, wherein an inner circumference surface on a front portion of the blowing duct is indented and protruding inwardly. Furthermore, the blowing duct has one or a plurality of projecting ledges in a ring shape and allowing cool air passing through the blowing duct to be discharged at high pressure by reinforcing the projecting ledges of the blowing duct and reducing the inner diameter of the blowing duct.;COPYRIGHT KIPO 2016
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