An air freshening system, including: an air compressor, for flowing air； a water inlet, for supplying water； a central pipe, for receiving the air from the air compressor, and for receiving the water from the water inlet； and a plurality of end devices, each including: a water dripper, including an inlet, for communicating with the central pipe； a filter, for filtering the air； and an outlet, for supplying filtered air, thereby allowing cleaning the filters of the plurality of end devices by supplying the water thereto.
