US Patent 7382975 Evaporator device for active substances with fan

Incorporates a device for active substances (3) which has a wick (6) and a first heating resistor (8) for operating the diffuser on normal system. It also has a single button (12) connected through an electronic circuit (10) to an additional second heating resistor (9) located in the same channel and after the first heating resistor (8) in the vicinity of the wick (6). Activation of the button (12) determines the switching on of the second heating resistor (9) and can also activate at the same time a fan (4) or even based on a fan speed (4) increase the same, moving from normal operating mode to boost mode in which a substantial and instant increase in evaporation and diffusion of the active substances is produced.