Patent ID: 7840123

Claim:
A diffusion device, comprising: a housing; an opening in the housing adapted for insertion of a container having an active material therein and a wick extending therefrom, wherein the wick has an axis extending along a length thereof; a heater disposed in a rear portion of the housing and spaced from the wick when a container is inserted into the housing; a vent disposed in a front portion of the housing; an active material diffusion-interference member disposed directly above and aligned with the axis of the wick when the container is inserted into the device, wherein in use, the diffusion-interference member inhibits diffusion of the active material from the housing such that heat generated by the heater is trapped around the wick, thus increasing volatilization and dispersion of the active material from the diffusion device as compared to a diffusion device that does not have a diffusion-interference member and a fan disposed in a rear portion of the housing opposite the vent and spaced from a top portion of the wick, wherein the fan moves vaporized active material out of the housing through the vent.