Abstract: The present invention discloses a phase-change heat dissipation device comprising a phase-change assembly internally provided with a phase-change heat exchange medium, the phase-change assembly comprises an evaporator part and a condenser part, the evaporator part has an evaporation chamber therein, the condenser part has a condensation chamber therein, the evaporation chamber is communicated with the condensation chamber, and a heat source is in direct contact with the evaporation chamber, the phase-change heat exchange medium in the evaporation chamber is configured to absorb heat from the heat source and transfer the heat to the condensation chamber, and the condensation chamber is configured to radiate heat outwards, so as to cool the heat source.

Abstract: The present invention discloses a boiling enhancement device which comprises an evaporation chamber having a cavity therein and boiling enhancement fins, the boiling enhancement fins are arranged on an inner wall surface of the evaporation chamber, a phase-change heat exchange medium is arranged in the evaporation chamber, and the evaporation chamber absorbs heat from a heat source and transfers the heat to the phase-change heat exchange medium through the inner wall surface. The boiling enhancement fins can increase the number of vaporization cores on the inner wall of the evaporation chamber and increase the area of boiling heat exchange so as to promote boiling vaporization of the phase-change heat exchange medium and reduce boiling thermal resistance.

Abstract: The present invention discloses a phase-change heat dissipation device comprising a phase-change assembly internally provided with a phase-change heat exchange medium, and the phase-change heat exchange medium provided in the phase-change assembly is configured such that, in an operating state of the phase-change heat dissipation device, an air pressure within the phase-change assembly is greater than 0.15 MPa. When the phase-change heat dissipation device of the present invention works in a working temperature range of 30-80° C.