Cold air drying device for red ginseng

The cold air drying device comprises a rack, a box body is hinged to the upper side of the rack, an air cylinder is hinged to one side of the rack, a telescopic rod of the air cylinder is hinged to the bottom of the box body, the upper side of the box body is of an open structure, and a feeding device is arranged on the upper side of the box body; the box body is rotationally connected with a plurality of air pipes, vent holes are uniformly formed in the upper semicircular surfaces of the air pipes, one side of the box body is fixedly connected with an air inlet box, one end of each air pipe is rotationally connected with the air inlet box, and a blocking plate is arranged at the other end of each air pipe and provided with a sampling inspection opening. By intermittently opening the blocking plate, a part of red ginseng slices falling into the air pipe are blown to the side edge of the blocking plate through air flow, and an inspector can take out a sample through a sampling inspection opening and send the s