▎ 摘　　要

NOVELTY - The bottle has a liner (101), a graphene cold screen (102), an outer liner (103) and a condensing pipe (104). The liner is connected with the outer liner to form an inner cavity (1). The graphene cold sheet is arranged in the inner cavity. The condensing tube is provided on the liner, and the liner is provided with a cold air exhaust hole (109). One end of the condensing tubes is connected to the cold exhaust hole. The other end is connected in contact with the external liner. The graphene cold screen is arranged on the condensate tube. The layer of graphene film layer is provided at the bottom of the graphene cold film sheet. USE - Dewar (RTM: Vacuum-insulated container) bottle for containing low temperature liquid used in physical, chemical and medicine field, and for containing superconducting quantum interference device (SQUID). ADVANTAGE - The graphene film on the graphene cold screen has good low-temperature heat conducting effect and low heat noise, reduces the Dewar heat noise at the same time, eliminates the vortex generated by Dewar. DESCRIPTION OF DRAWING(S) - The drawing shows a schematic view of Dewar bottle. Cavity (1) Liner (101) Graphene cold screen (102) Outer liner (103) Condensing pipe (104) Adiabatic material (105) Vacuum valve (106) Water-isolating ventilation valve (107) Activated carbon layer (108) Cold air exhaust hole (109)