Device for dispersing in the air a vapor of a liquid substance

An apparatus for dispersing in the air, in the vapor state, a substance which is in the liquid state at ambient temperature, and is contained in at least one storage container, the apparatus comprising:

• a ventilation system comprising a duct which opens out into the open air, and is configured to permit the passage of a flow of air into the duct;
• a at least one dispensing unit which is designed to be supplied with the liquid substance by the at least one storage container, the at least one dispensing unit comprising micro-ducts forming an outlet which is provided in the duct in order to constitute an area of evaporation of the substance therein;
• wherein the at least one storage container contains the substance and is connected to the at least one dispensing unit, wherein the at least one storage container has a discharge orifice which is connected to the at least one dispensing unit, and is oriented downwards when the apparatus is in a position of use, the at least one dispensing unit being below the discharge orifice in the position of use,
• a heating unit which is provided on or in the at least one dispensing unit, such as to control a flow of the substance through the at least one dispensing unit, wherein the substance has a viscosity which is variable according to the temperature, said viscosity being such that the substance can not flow through the micro-ducts of the at least one dispensing unit at an ambient temperature lower than a first temperature, and wherein the heating unit is configured to heat the at least one dispensing unit to a second temperature higher than the first temperature, such that a flow of the substance through the micro-ducts of the at least one dispensing unit takes place by capillarity in the position of use.