Airflow Classification Device.

Abstract

The present invention relates to an air flow classification apparatus. The apparatus comprises a feed component, an air flow classification device, a dust collector and a fan. The air flow classification device comprises: a classification chamber, in which an outer wall at an upper end of the classification chamber is fitted with a feed device, and one end of the classification chamber is fitted with a first discharge device; a drive unit fitted with a second discharge device; and a classification wheel arranged at the upper end of the classification chamber to form a classification zone, with the classification zone in communication with the second discharge device. When the apparatus of the present invention is in use, the materials enter the classification chamber under the negative pressure generated by the fan, and then, as they move in a spiral path within the classification chamber, the materials strike an inner circumferential wall of the chamber, generating frictional resistance. This prolongs the settling time of the materials within the classification chamber, thereby enabling a more thorough classification of the materials and increasing the accuracy of the classification process. Furthermore, the apparatus does not require numerous air inlets, thereby preventing excessively low negative pressure at the feed device, which would affect the feed rate.