Solar-powered seawater desalination device, stove combined device and using method thereof

The invention discloses a solar-powered seawater desalination device, a stove combined device and a using method thereof. The solar-powered seawater desalination device comprises a solar thermal collector, a seawater evaporator, a solar energy pumping station, an expansion tank, a condenser, a seawater storage container and a photovoltaic module, wherein the solar thermal collector is used for converting the solar radiation energy into heat energy so as to provide a heat source for a circulating medium; the seawater evaporator is used for heating the seawater so as to generate steam by taking the circulating medium provided by the solar thermal collector as a heat source; according to the solar energy pumping station, circulation of the circulating medium between the solar thermal collector and the seawater evaporator is realized; the expansion tank is connected with the solar energy pumping station, and the pressure change of the circulating medium in a circulating path is regulated by storing or releasing the circulating medium; the condenser is used for cooling the steam conveyed by the seawater evaporator so as to form fresh water; the seawater storage container is used for storing the seawater and supplying the stored seawater to the condenser so as to serve as cooling water by virtue of a seawater supply pump; and the photovoltaic module is used for converting the solar energy into electric energy for providing power for electric equipment. Therefore, seawater desalination can be rapidly realized by virtue of solar energy only.