Electric heaters

An element for an electrically energized vaporizer of liquid, including a body of electro-conductive material having one major face defining a liquid inlet and a second major face defining a vapor outlet which body is both thermally and chemically stable and is permeable by a liquid to be vaporized, said body being electrically energizable to heat and vaporize liquid as it flows from said liquid inlet face to said vapor outlet face said body being in the form of a hollow cylinder wherein said vapor outlet face is a cylindrical surface, blind recess means in the form of a plurality of parallel elongated recesses comprising grooves or slots in said body open to said vapor outlet face, and extending substantially between the ends of the cylinder for providing effective escape routes for earliest produced vapor whereby the entrainment of liquid in vapor emerging from said second major face is reduced compared with the amount of entrainment of liquid which would result if the escape route means were not present.

An element for an electrically energized vaporizer of liquid, including a body of electro-conductive material having one major face defining a liquid inlet and a second major face defining a vapor outlet which body is both thermally and chemically stable and is permeable by a liquid to be vaporized, said body being electrically energizable to heat and vaporize liquid as it flows from said liquid inlet face to said vapor outlet face said body being in the form of a hollow cylinder having said vapor outlet face as the outer cylindrical surface, blind recess means in the form of blind holes of which the cross-sectional area and the distribution are predetermined for providing effective escape routes for earliest produced vapor whereby the entrainment of liquid in vapor emerging from said second major face is reduced compared with the amount of entrainment of liquid which would result if the escape route means were not present.