The principle of ultrasonic cleaning is to obtain a"Cavitation effect" in the cleaning fluid, that is, the cleaning fluid to form stretching and compression conditions, cleaning fluid when stretching will form a large number of fine bubbles, the bubbles may break when the cleaning fluid is compressed. The local pressure at which these bubbles form and break apart can reach the impact force of thousands of atmospheres, which is strong enough to cause changes in the molecules of matter, cause all kinds of chemical and physical changes (decomposition, chemical, emulsion, dispersion, etc.) , can be used to remove the surface of stripped articles of dust, oil stains, rust and other impurities.

The cavitation effect is the most important factor to evaluate the cleaning effect, and the ultrasonic frequency is directly related to the cavitation effect.

The frequency is inversely proportional to the bubble diameter in the liquid and positively related to the water permeability. The higher the frequency, the shorter the wavelength, the smaller the bubble diameter, the lower the explosion pressure, the better the permeability, more suitable for the surface smoothness, fine workpiece cleaning. In addition, the frequency can not be too high, or wavelength shortening, cavitation will become weak, thus reducing the efficiency of cleaning.

On the contrary, the lower the frequency of ultrasound, the easier it is to get cavitation in the liquid, resulting in less force, the stronger the effect, more suitable for rough surface and more difficult to clean stains. Ultrasonic frequency will also affect the work of the high-frequency noise, the lower the frequency, the more noise, usually in line with the cleaning effect, it is best to choose a relatively high frequency.

Here's how it works:

Low frequency 17K-23K: it is more suitable for cleaning the work piece with heavy stain or not easy to clean, and when the impact force of bubble burst is not easy to cause damage to the surface of work piece, it should choose low frequency ultrasonic cleaning machine to clean, for example: auto parts, textiles and so on.

Intermediate frequency 25K-28K: it is suitable for cleaning slightly heavy stains or cleaning difficulty is moderate, and the bubble burst impact force is not easy to cause damage to the surface of the workpiece, should choose intermediate frequency ultrasonic cleaning machine cleaning, for example: hardware equipment, electroplating industry.

Medium and high frequency 33K-60K: relatively suitable for cleaning stains relatively light or relatively easy to clean, and bubble burst impact on the surface of the workpiece is not easy to cause damage, should choose the medium and high frequency ultrasonic cleaning machine cleaning, optical lenses, electronic component, etc. .