Abstract: Disclosed is a flat plate heat transfer device, which includes a thermally conductive flat case installed between a heat source and a heat emitting unit and containing a working fluid evaporated with absorbing heat from the heat source and condensed with emitting heat to the heat emitting unit; and a mesh layer aggregate installed in the flat case and having a structure that a fine mesh layer for providing a flowing path of liquid and a coarse mesh layer for providing a flowing path of liquid and a dispersion path of vapor simultaneously are laminated. On occasions, the coarse and the fine mesh layers are alternately laminated repeatedly, and the fine mesh layer is replaced with a wick structure. The coarse mesh layer is preferably a screen mesh layer with wire diameter of 0.2 mm˜0.4 mm and mesh number of 10˜20. This device improves heat transfer performance.

Abstract: Disclosed is a flat plate heat transfer device which includes a flat plate case installed between a heat source and a heat dissipating unit and receiving a working fluid evaporated with absorbing heat at the heat source and condensed with dissipating heat at the heat dissipating unit, and at least one layer of mesh installed in the case and formed so that wires are alternatively woven each other horizontally and vertically in turns. A steam passage through which the working fluid may flow is formed along the surface of the wires from the junctions of the mesh.