Patent ID: 7992554

Claim:
A liquid evaporator comprising: a liquid reservoir with a liquid to be evaporated; an evaporator tube; a heater for heating the evaporator tube, the evaporator tube having adjacent areas consisting of materials of different porosities, including one or more areas with one or more porous sintered glass or porous sintered ceramic elements, which said areas are in connection with the liquid in the liquid reservoir and are present on one front side of the liquid evaporator wherein the other front side is used to dispense the evaporated liquid, and an area of the evaporator tube outside the liquid reservoir, which said area is heated by means of the heater provided with a porous sintered metal or said porous sintered ceramic, which is not directly in connection with the liquid with at least two different cross section distributions of the materials having different porosities present in the longitudinal direction of the liquid evaporator, and the areas in the liquid evaporator are adjacently in connection by means of three-dimensionally shaped contact areas.