Abstract: An automatic scent dispensing system for distributing scents on a user-adjustable schedule without requiring user attention. The system includes a tank system for holding a scent substance that includes a reservoir, and a pump. A dispensing nozzle is mountable on an air duct. A duration timer controls a duration of dispensing of the scent substance, and is adjustable to set the duration of operation of the pump for dispensing the scent substance. An occurrence timer controls a time period between dispensing of scent, and triggers the duration timer after passage of a selected time period. A regular/irregular selector switch controls the actuation of the duration timer, and has an irregular setting for triggering the duration timer at selected events (such as circulating fan operation or an increase in duct air pressure) and a regular setting for triggering the duration timer by the occurrence timer after a selectable time period.

Abstract: A automatic scent dispensing system for distributing scents throughout a building on a user-adjustable schedule without requiring user attention. The automatic scent dispensing system includes a tank system for holding a scent substance, with the tank system including a tank housing having a plurality of reservoirs for holding a scent substance therein. A selector valve selects flow from one of the reservoirs. A pump pumps the scent substance out of the reservoirs. A dispensing nozzle mounts on the duct of the air circulating system such that an orifice of the nozzle is in communication with the air passage of the duct. The dispensing nozzle is connected to and in fluid communication with the outlet of the pump. A duration timer selectively controls a duration of dispensing of the scent substance. The duration timer controls supply of electrical power to the pump, and is adjustable to set the duration of the supply of electrical power to the pump for dispensing the scent substance.