Air door of making an uproar falls in unsmooth grain shape in surface

The utility model provides a shape is irregular and appears that air door of making an uproar falls in unsmooth grain shape in surface has unsmooth granule at the surface distribution of air door, unsmooth granule. The utility model discloses an at the surface machining of air door some rule or anomalous unsmooth grain shape, when fast -speed air current when the air door is surperficial, these unsmooth grain shape can reflect the air current, scattering, refraction and rectification to reduce vehicle air conditioner's wind and make an uproar, improve the air stream temperature homogeneity through this kind of air door surface simultaneously to a certain extent. 种表面凹凸颗粒形状的降噪风门，在风门的表面分布有凹凸颗粒，凹凸颗粒的形状为不规则形。本实用新型通过在风门的表面加工些规则或者不规则的凹凸颗粒形状，当高速的气流经过风门表面的时候，这些凹凸颗粒形状可以对气流进行反射、散射、折射和整流，从而降低汽车空调的风噪，同时在定程度上提高经过此种风门表面的气流温度均匀性。