Device for desalination by liquid water jet compression, wherein the desalination device comprises: • at least one latent heat exchanger of tubes or chambers located inside a shell, wherein said latent heat exchanger comprises: ∘ a feeding system with an inlet for an aqueous solution or seawater to be desalinated or purified, ∘ an evaporation chamber comprising an inner evaporating surface of the tubes or chambers, connecting the inlet of aqueous solution or seawater with an evaporated water vapor outlet, ∘ a condensation chamber comprising an external condensing surface of the tubes or chambers, ∘ a collection chamber, configured to collect a primary water vapor produced in the evaporation chamber, ∘ at least one primary water vapor outlet, and ∘ at least one secondary water vapor inlet to the condensation chamber; and • at least one vapor path from the at least one primary vapor outlet to the at least one secondary vapor inlet; characterized in that the desalination device further comprises: at least one liquid water pressure pump that provides pressurized water flow to at least one pressure nozzle configured to produce a liquid water jet into the at least one vapor path, wherein, in use, said liquid water jet is applied to the primary water vapor while said primary water vapor is moving through the vapor path, having the drops of the liquid water jet a speed greater than the speed of the primary water vapor and inputting kinetic energy to the primary water vapor, giving rise to the secondary saturated vapor that condenses on the condensing surface of the latent heat exchanger; and the at least one vapor path is at least one obstacle-free vapor path from the evaporating surface to the condensing surface of the latent heat exchanger, through which the vapor flows at high speed and flow rate. • at least one latent heat exchanger of tubes or chambers located inside a shell, wherein said latent heat exchanger comprises: ∘ a feeding system with an inlet for an aqueous solution or seawater to be desalinated or purified, ∘ an evaporation chamber comprising an inner evaporating surface of the tubes or chambers, connecting the inlet of aqueous solution or seawater with an evaporated water vapor outlet, ∘ a condensation chamber comprising an external condensing surface of the tubes or chambers, ∘ a collection chamber, configured to collect a primary water vapor produced in the evaporation chamber, ∘ at least one primary water vapor outlet, and ∘ at least one secondary water vapor inlet to the condensation chamber; and ∘ a feeding system with an inlet for an aqueous solution or seawater to be desalinated or purified, ∘ an evaporation chamber comprising an inner evaporating surface of the tubes or chambers, connecting the inlet of aqueous solution or seawater with an evaporated water vapor outlet, ∘ a condensation chamber comprising an external condensing surface of the tubes or chambers, ∘ a collection chamber, configured to collect a primary water vapor produced in the evaporation chamber, ∘ at least one primary water vapor outlet, and ∘ at least one secondary water vapor inlet to the condensation chamber; and • at least one vapor path from the at least one primary vapor outlet to the at least one secondary vapor inlet;