▎ 摘　　要

NOVELTY - The device has a water tank (9) and a photo-thermal conversion element. The photo-thermal conversion element floats in the seawater above the water tank. The photo-thermal conversion element includes a base structure formed of a foamed material, and a groove (42) with an upper side opening is formed on the base structure. The groove is filled with a foamed nickel matrix (20), and the lower wall surface of the matrix is provided with a capillary structure water delivery channel (18). The water delivery channel communicates with the water body of the water tank and the foamed nickel substrate (19), and the upper portion of the groove is provided with a photo-thermal conversion coating. The photo-thermal conversion coating is connected with the foamed nickel substrate, and the buoyancy of the foamed material is greater than gravity. The upper surface of the photo-thermal conversion coating maintains the same height as the upper surface of the water body. USE - Solar heat-collecting device for desalinating seawater used in solar heat collector (claimed). ADVANTAGE - The device generates a large amount of steam without the assistance of a heating device, suppresses the dissipation of the generated heat energy from the film to the lower layer of the liquid, improves the vaporization efficiency of the device and demonstrates great potential as a new energy material for photo-thermal conversion. The heat loss caused by the heat dissipation to the environment through the water body is greatly reduced. The device optimizes the porosity and the aperture of the photo-thermal conversion element and improves the conversion efficiency. The uniform heat exchange is ensured. The heat collecting effect is improved, the heat release capacity of the heat collecting pipe is improved and the energy consumption is reduced. DETAILED DESCRIPTION - INDEPENDENT CLAIMS are included for the following: (1) a method for preparing the photo-thermal conversion element of the solar heat-collecting seawater desalination device; and (2) a solar heat collector. DESCRIPTION OF DRAWING(S) - The drawing shows a schematic diagram of the solar heat-collecting device for desalinating seawater. (Drawing includes non-English language text) Water tank (9) Capillary structure water delivery channel (18) Foamed nickel substrate (19) Foamed nickel matrix (20) Groove (42)