Air flow direction "Small Cooling Fan" Once the wind box cavity outlet airflow rate, the effect of the formation of hair, it will cause the wind box surrounding air flow to follow up. On the one hand, the air from the fan on the back will be added after coming forward, to strengthen the central air effect, on the other hand, "Small Cooling Fan" outlet box outside air will be because of the negative pressure caused by the air flow coming together to complement and broaden the scope of hair . Various flow overlay, will form the base several times in the absorption capacity of the air blast effects. "Small Cooling Fan" air from the back came forward after the supplementary effect of strengthening the central casing peripheral blast air flow caused by negative because it came together supplement and broaden the scope of the airflow hair style box section