Atomizer nozzle

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A perfumery atomizer

An atomizer nozzle can take on many forms. The first atomizer nozzle also called a aspirator nozzle was invented by Dr. Thomas DeVilbiss of Toledo, OH in the late 1800s for producing a fine spray of a liquid based on the Venturi effect. His device was used for spraying medicine on the back of his patient's throats. Atomizer nozzles can create atomization from a variety of mechanical means, which includes but is not limited to: electrostatics processes, ultrasonic nozzle and centrifugal forces.

Principle of operation[edit]

When a gas is injected under pressure through a tube with a decreasing section, it speeds up, generating a pressure drop at the narrowest point (due to Bernoulli's principle).

The reduced pressure, due to the pressure difference between the two points, sucks up a liquid from a reservoir through a narrow tube into the moving gas flow, and projects it forward as a fine spray of droplets (although not atoms as the name suggests).

Principle of operation of an atomizer

They may be automated or manually operated, the latter being typically by means of a manual pump (rubber ball or piston), this being a traditional type of atomizer used for perfume.

Applications[edit]

Atomizer nozzles are used for spraying perfumes, for applying paint, in fuel injection systems, and in spray drying installations.

An airbrush is used for artwork and is an example of an atomizer nozzle. Air is passed in down the right hand tube, and the nozzle sucks up the paint from the receptacle and a very fine spray of paint is produced which gives an extremely soft edged coloration quite unlike that of a brush.

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