New sixth-generation head of the traditional type cyclone cyclone head shortcomings improvement, so that the external vent outlet cross-sectional area larger than the internal cross-sectional area, and after many experiments testing the outlet blade angle adjusted to the optimum angle (30 degrees) riser significantly content volume rate enables the smooth discharge of fumes outdoors, enhance the performance range hood, so downdraught phenomenon completely improve and maintain your quality of living and health of their families.