Air extractor for nano calcium powder bin

The utility model discloses an air extractor for a nano calcium powder stock bin, which relates to the technical field of nano calcium powder stock bins and comprises a lower base and support legs, abox body is arranged in the middle of the top of the lower base, an upper base is arranged at the top of the box body, and an air extracting pump is mounted on one side of the top of the upper base. An air pump is installed on the other side of the top of the upper base, a three-way electromagnetic valve is movably connected between the air pump and the air pump, and a feeding port extending intothe box body is formed in the top of the upper base. The pipeline, the through hole, the air exhaust film and other structures are arranged, and the pipeline is designed to be of a spiral structure and is placed in the box body from top to bottom, so that when the air exhaust pump exhausts air, air in the box body can be uniformly introduced into the pipeline through the through hole and the air exhaust film and then is ex