Efficient fan

The utility model relates to the field of fans, and particularly discloses an efficient fan which comprises a front shell and a rear shell, an air outlet is formed after the front shell and the rear shell are assembled, a pressurizing part is arranged at the air outlet and is of a protruding structure, the minimum diameter of the pressurizing part is smaller than the diameter of the inner wall of the air outlet, and the surface of the pressurizing part is an arc-shaped surface. The air pressure at the outlet of the fan is increased by reducing the diameter of the air outlet, and the surface of the pressurizing part is of an arc-shaped structure, so that the air flowing effect at the position is better, and furthermore, the efficiency of the fan is improved, and the energy consumption is reduced. 本实用新型涉及风机领域，具体公开了一种高效风机，包括前壳、后壳，前壳与后壳拼装后形成有出风口，出风口处设置有增压部，增压部设置为凸起结构，增压部的最小直径小于出风口内壁的直径，且增压部表面设置为弧形面，通过缩小出风口处的直径，实现该风机出口处风压的增加，并且增压部的表面设置为弧形结构，能够使该处的气体流动效果更好，进一步的，使得该风机效率提高、耗能减少。