Fragrance delivery system

A fragrance delivery system, comprising:

• a control unit configured to control a release mechanism to release at least one selected fragrance, said control unit comprising a selection unit configured to select said selected fragrance from at least two fragrances and said control unit controlling said release mechanism to release said selected fragrance, and
• a switching element configured to switch said release mechanism between a first release state and a second release state or vice versa,
• wherein said release mechanism releases said selected fragrance from said fragrance delivery system to a space in said first release state and in said second release state, and wherein said release mechanism releases said selected fragrance at a higher rate in said first release state than in said second release state, and
• wherein said switching element is further configured to switch said release mechanism between said first release state and said release second state during a first period of time, and to switch said release mechanism between said first release state and said second release state during a second period of time, wherein said first period of time is longer in duration than said second period of time,
• a timer configured to measure a measured period of said first state in the range of from 100 to 200 seconds and a measured period of said second state is in the range of from 20 to 100 seconds,
• a memory element in which at least one desired value of a period of the first and/or second state may be stored, and
• a comparator configured to compare said measured period of said first and/or second state with said desired value and output a switching signal to said switching element,
• wherein said switching element is arranged to change said release mechanism between said first state and said second state in response to said switching signal.