Internal vacuum type single-cone spiral freeze dryer

The invention discloses an internal vacuum type single-cone spiral freeze dryer, and relates to the technical field of dryers, the internal vacuum type single-cone spiral freeze dryer comprises a single-cone shell, the single-cone shell is used for containing materials needing to be dried, a top sealing cover is mounted on a top flange of the single-cone shell, and a feeding pipe is further fixedly mounted at the top of the top sealing cover. According to the internal vacuum type single-cone spiral freeze dryer, materials contained in the single-cone shell are subjected to layered and segmented material turning treatment along the spiral track, the efficiency and frequency of spirally guiding the materials to the middle of the single-cone shell to be turned are improved, the stirring, turning and freezing efficiency of the materials can be improved when the materials are frozen, and the freezing efficiency of the materials is improved. And when the materials are heated to be dried, the drying efficiency of th