Abstract: The present invention refers to a volatile substance diffuser based on permeable membrane with a closure where a solid wall is applied to or separated from the membrane to stop or allow evaporation, respectively. The shape of the membrane is adapted to compensate possible vacuum inside the container.

Abstract: Electric vaporiser for a fragranced or insecticidal active substance with adjustment of the evaporation intensity, includes a support technical body, onto which a porous element impregnated with the active substance and an electric heating device located in the proximity of the porous element are fixed, in order to determine the evaporation of the active substance in an evaporation area. The electric heating device is housed in a drawer which is movable in a direction substantially perpendicular to the porous element, between a position of maximum evaporation intensity, near or adjacent to the porous element, and a position of minimum evaporation intensity, far from the porous element. The control mechanism which causes the shifting of the electrical device includes a variable-radius cam obtained in an adjustment disc, with which a pin integral with the drawer and protruding therefrom engages; the mechanism is located entirely outside the evaporation area.

Abstract: Electric vaporiser for a fragranced or insecticidal active substance with adjustment of the evaporation intensity, includes a support technical body, onto which a porous element impregnated with the active substance and an electric heating device located in the proximity of the porous element are fixed, in order to determine the evaporation of the active substance in an evaporation area. The electric heating device is housed in a drawer which is movable in a direction substantially perpendicular to the porous element, between a position of maximum evaporation intensity, near or adjacent to the porous element, and a position of minimum evaporation intensity, far from the porous element. The control mechanism which causes the shifting of the electrical device includes a variable-radius cam obtained in an adjustment disc, with which a pin integral with the drawer and protruding therefrom engages; the mechanism is located entirely outside the evaporation area.

Abstract: A combustion exhaler for the vaporization of an insecticide or perfumed substance, comprises a housing (1, 2) having intake and exit vents (4), and a solid porous combustible element (6, 9) impregnated with said substance, placed inside said housing between said intake and exit vents, and fixed onto appropriate support means. The combustible element shows a high ratio between the mass of the active substance and the mass of the combustible element and, in one embodiment, a low mass/length ratio.

Abstract: An electric evaporator for insecticides or perfumes in liquid formulation, contained in a bottle which can be steadily inserted into a container, includes a wick, an element for housing and centering the wick and a respective electric heating device. The wick housing and centering element are joined to the walls of the container through elastic bridge-pieces which have the shape of a loop extending respectively in horizontal and vertical planes. A cam device, which is actuated manually outside of the container, allows displacement of the wick housing and centering element in a direction perpendicular to the axis of the wick, towards or away from the heating device.