"Blower Fan" in order to make small, low noise, high efficiency and achieve a balanced, smooth airflow required. The research and development of the actual airflow blower. To detect exemplary figure as an example, there has been between the swirl blade. In principle, the need to curb the noise caused by the turbulence so that air flows along the blade surface can be made without departing from the blade surface. So, we have a little bit of changing the shape of the fan blade, repeat CFD analysis, optimization model was originally made of blades and volute shape. Then follow the shape of the trial blowers, air flow is detected by comparing the CFD analysis results, to improve the accuracy of analysis. By repeating this process, we come to the final shape.