Intermittent aerosol dispensing valve

The valve assembly can emit an aerosol content automatically at intervals of predetermined from an aerosol container (12), without using electric power. A partition (40) defines partially at least the accumulation chamber (36) which receives gas promotion agents from some cans (12) between accumulation phases. If the internal pressure of an accumulation chamber (36) reaches a predetermined threshold value, a partition will move with a sealing part, sealing of an exit channel (51) will be canceled, and spray jet of a main activity medicine will be started by this. If the pressure in an accumulation chamber (36) becomes lower than threshold value pressure, a partition (40) will take the original position.