Electrical steam generator for intermittent operation

Claim 1

A steam generator intended for intermittent operation, consisting of a body (1), in which a water conducting passageway (3) and hollow spaces (8,9,10) and intermittently energizable electric resistance elements (7) in said hollow spaces are located, which body (1) is cylindrical and homogenous with said passageway (3) axially and symmetrically positioned therein, from which passageway at least one radial outlet passageway (4,5) extends out of the body (1), characterized in that the body (1) externally is provided with a heat insulating material (11), the thickness of which is about the same magnitude as the radius of said body (1), which material is enclosed in a casing (12) made of a material, at least the inner surface of which is reflective, said insulating material and said casing together being capable of maintaining said body at a standby temperature of at least 70° C. when said resistance elements are deenergized between intermittent periods of steam generation, said resistance elements being capable when reenergized of heating said body to a steam generating temperature from said standby temperature in about 30 seconds, and in that an atomizing nozzle is provided for introducing water into said water conducting passageway consisting of a pipe located in the water conducting passageway (3) along at least the greater part of the length of the water conducting passageway (3) and radially spaced from the walls of the water conducting passageway (3), said pipe being provided with a plurality of small apertures distributed along the entire length of said pipe for effecting a uniform spray of atomized water against substantially all of the water conducting passageway walls.