| 摘要 |
PURPOSE: A turbo fan for air conditioner is provided to reduce the noise generated by the air passing through each blade, while improving discharge pressure of the cooling air. CONSTITUTION: A turbo fan comprises a circular boss(20); a first blade(21a) having a predetermined inlet angle(theta1) and an outlet angle(theta2); and a second blade(21b) having an inlet angle(theta3) same as the inlet angle of the first blade, and an outlet angle(theta4) different from the outlet angle of the first blade. Pairs of first and second blades are arranged in sequence along the circumferential direction of the boss. Even when first and second blades are arranged at an equal spacing along the outer periphery of the boss, an air inlet and an air outlet have different area since the length of each blade is different. Thus, the blade pass noise of the air is reduced.
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