| 摘要 |
An assembly of a fan and a shroud is provided to minimize noise caused by eddy and turbulence of air in a heat exchanger by slowing down a forward flow of air while maintaining a gap between the shroud and a fan band. An assembly of a fan and a shroud(20) comprises a counterflow prevention rib(24) formed at a portion between a blowhole(28) and a guide part(29). The counterflow prevention rib protrudes opposite the current of air to minimize noise caused by the backflow of air. The fan includes a hub coupled to a rotary shaft of a motor and a plurality of blades formed at an outer circumference of the hub. The shroud includes the guide part which surrounds the fan to guiding blowing air and the blowhole for moving air downstream. |
