LOW-NOISE COOLING FAN USING UNEVEN SPACING BLADE

摘要

PURPOSE: A low noise cooling fan using a unequally-spaced blade is provided to reduce noise which is generated from a cooling fan by arranging blades with unequal spaces between the blades. CONSTITUTION: A low noise cooling fan using a unequally-spaced blade comprises a hub (5) and multiple blades (20). The driving shaft is connected to the center of the hub. The blades are formed with unequal spaces from each other around the hub as the center, where the spaces have different angles from each other. One of equal angles which is produced by dividing 360° equally by the number of the blades is set as the reference angle. Each blade is arranged around the hub as the center by increasing or decreasing the rest of angles by 6-8% from the reference angle.