AUTOMATIC VALVE FOR AEROSOL DISPENSER

摘要

A dispenser can automatically dispense chemical from an aerosol container (22) at predetermined intervals without the use of electric power. A diaphragm (58) at least partially defines an accumulation chamber (56) that receives chemical from the can (22) during an accumulation phase. Once the internal pressure of the accumulation chamber (56) reaches a predetermined threshold, the diaphragm (58) moves, carring with it valving (33) that controls a spray burst. The diaphragm (58) assumes its original position when the pressure within the accumulation chamber (56) falls below a threshold pressure. A barrier prevents the aerosol container (22) from resuppling the accumulation chamber (56) at a high rate during the spray phase, preferably due to a porous gasket disposed in a passageway linking the dispenser to the aerosol container (22).