Automatic rotating centrifugal oil throwing impeller

The utility model discloses an automatic rotating centrifugal oil throwing impeller for oil-gas separation of a range hood. The automatic rotating centrifugal oil throwing impeller consists of a slope-shaped oil gathering ring, a crossed supporting frame and a centrifugal impeller, wherein four outer ends of the crossed supporting frame are fixedly connected with the slope-shaped oil gathering ring; the center of the crossed supporting frame is connected with an axis of the centrifugal impeller through a bearing; the centrifugal impeller is arranged in the slope-shaped oil gathering ring and can flexibly and freely rotate under the supporting of a center shaft of the crossed supporting frame; the axial flow centrifugal impeller consists of 8-10 centrifugal blades which are integrally processed in the form of an involute and are provided with torsional angles. When a fan is started, and lampblack gas flow which flows into a suction opening flows through the centrifugal impeller, the centrifugal impeller can automatically rotate and generate centrifugal force and certain suction force; when oil particles mixed in flue gas collides the centrifugal impeller, the oil particles attached to the centrifugal impeller are thrown to the surrounding oil gathering ring under the action of the centrifugal force and then flow into an oil storage box of the range hood; the centrifugal blades are in the involute form which approaches a trace formed by a fact that the oil particles are thrown away by the centrifugal force, and the oil particles cannot fall off; the residual lampblack is sucked into the fan and is discharged out of a room through clearances between the centrifugal blades. The automatic rotating centrifugal oil throwing impeller is suitable for families and catering industries with large lampblack content and retrofitting and modification of new and old range hoods.