Importance

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Abstract

An ultra low volume fog or aerosol generator produces a fog with droplets whose particle size or sizes are easily varied from about 5 microns to about 20 microns during the operation of the machine. This generator includes an air blower, the discharge of which is directed along a prescribed path, thence, through a passageway and, thence, through a nozzle into the ambient air. Liquid supplied to the nozzle is entrained by the air as it passes through the nozzle for producing finely droplets dispersed in the air. The particle sizes of the droplets are regulated by altering the volume of air discharged through the nozzle by means of an air regulator valve, which diverts a portion of the air from its prescribed path. An electrical motor controls the opening and closing of the air regulator valve. In one embodiment, the motor cyclically modulates the opening and closing of the valve. In another embodiment, the motor is a reversible, D.C., stepping motor, the rotation of which alters the position of the gate in the valve to prescribe the amount to which the valve is opened or closed.

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First Claim