COOLING FAN FOR HEAT EXCHANGER

摘要

PURPOSE: A cooling fan for a heat exchanger is provided to prevent infiltration of impurities such as rain water and snow into a motor driving the cooling fan, and to smoothly cool down the motor. CONSTITUTION: A hub of a cooling fan(210) includes a rotary shaft housing part(221) housing a rotary shaft of a motor to prevent relative rotation of the rotary shaft; a hub front part(222) extended outward from a front part of the rotary shaft housing part; a side wall part(224) extended backward from a circumference of the hub front part in vertical direction; and a guide part(225) formed on an inside of the side wall part to guide air in the side wall part inwardly. A gap is formed between the motor and an inner end of the guide part by 4mm-10mm. The guide part is formed to be bent in a direction in which the hub is rotated. The guide part is extended along the inside of the side wall part to be perpendicular to the hub front part. The hub and blades(250) are formed integrally with each other.