Device for desalting seawater through solar energy and deep sea bottom low-temperature water

The invention relates to a device for desalting seawater through solar energy and deep sea bottom low-temperature water. The device is characterized in that a multi-layer evaporator (16) is arranged in a water pool (1), a sealed greenhouse (5) is arranged on the upper side of the water pool (1) and is made of glass or plastic cloth, the sealed greenhouse (5) faces the sun, a condensing chamber (6)is arranged on the side, close to the water pool (1), of the sealed greenhouse (5), a plurality of condensing pieces (7) are arranged in the condensing chamber (6), one end of each condensing piece (7) is connected with a condenser water inlet pipe (13), the condenser water inlet pipe (13) is communicated with a main water inlet pipe (2), the other ends of the condensing pieces (7) are connectedwith a water return pipe (8), a desalted water recovery pipe (9) is arranged on the lower side of the condensing pieces (7), and the desalted water recovery pipe (9) goes to a desalted water storage pool (10). By means of an electrostatic generator (12), the surfaces of the condensing pieces (7) carry charges and attract water molecules. The temperature difference is formed through the solar energy and the sea bottom low-temperature water, and therefore fresh water is prepared; the device is particularly suitable for occasions such as islands with few people and gobi with rich brackish water.