Dampferzeuger

The invention relates to a steam generator for a humidifier of an air-conditioning system connected, via a pipe, to the dilution cone positioned inside an air circulation duct of the humidifier. It comprises a receptacle (21) provided with an outlet orifice (22) for the steam generated inside said receptacle (21), the orifice (22) being connected to said pipe (4) of the humidifier, with a water-filling orifice (23) connected to the outlet of a feed valve (48), the inlet of which is connected to a water supply source, and, inside said receptacle (21), an electric resistor (30) which is immersed completely in the water contained, up to a certain level, in said receptacle (21), and a control unit (60) which receives the signals delivered by a hygrometer (9) and which controls the intensity of the current which passes through the resistor (30), said resistor (30) being supplied at constant voltage, the unit (60) bringing the intensity of the current in the resistor (30) under the control of the value of the signals delivered by the hygrometer (9). Application: air humidifier in aeroplanes.