HEAT PIPE

Abstract: a heat pipe is provided that that can raise the efficiency of circulation of a working fluid, and thereby possesses a superior thermal transport property. a heat pipe includes a container having an internal space s in which a working fluid f is sealed, the container including: a evaporation portion that evaporates a liquid-phase working fluid fto change phase to a gas-phase working fluid f; a condensation portion arranged at a position that is separated from the evaporation portion , and condenses the gas-phase working fluid fto change phase into the liquid-phase working fluid f; and a middle portion positioned between the evaporation portion and the condensation portion ; in which, viewing a transverse section of the evaporation portion , the heat pipe includes: a first sintered body layer consisting of a sintered body of a first copper powder, and formed in a specific area on an inner circumferential surface of the container ; and a second sintered body layer consisting of a sintered body of a second copper powder having a larger average particle size than the first copper powder, and formed annularly over an entirety of an inner circumferential surface of the container , in a state in which the first sintered body layer is interposed between the inner circumferential surface of the container and the second sintered body layer.

Inventor(s): Masahiro UEKUBO

CPC Classification: F28D15/046 (HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT (fluid heaters having heat generating means and heat transferring means ; furnaces ; details of heat-exchange apparatus of general))

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