Photovoltaic inverter heat dissipation device

The utility model discloses a photovoltaic inverter heat radiation device comprising an inverter housing, an installation substrate fixedly installed in the inverter housing, an IGBT module fixedly installed on the installation substrate, a heat conduction plate fixedly installed on the IGBT module, and a heat radiator fixedly installed on the heat conduction plate. One end, away from the heat-conducting plate, of the radiator penetrates through the inner wall of the inverter shell and extends to the outside; when the IGBT module works, a large amount of heat is generated, the phase-change medium in the evaporation section absorbs the heat conducted by the heat conducting plate, the phase-change medium is heated and evaporated into a gas state and flows upwards, and when the phase-change medium rises to the condensation section, the phase-change medium releases heat and is condensed into a liquid state and flows back to the evaporation section under the action of gravity and capillary force. When the IGBT mod