▎ 摘　　要

NOVELTY - graphene nano-machine by freeze-drying. material from the low-temperature quick freezing to freezing of water under the vacuum environment in the molecular direct sublimation into a vapour overflowing in the process, usually a fine amount of graphene, the lyophilisate loss and environmental pollution, so that the cost is increased. The utility model comprises a refrigeration vacuum drier (2), a vacuum pump (5), the air outlet is connected with the filter (1) of the feeding port of the vacuum freeze drier (14) connection, the negative pressure joint of said vacuum pump (10) connected with the vacuum pump through exhaust pipe (4). The utility model is used for graphene nanometre by freeze-drying machine.