Knowledge | 2022-08-02
What is the meaning of variable Wave and degassing in an ultrasonic cleaning machine?
Variable Wave: variable wave principle: variable wave = rough cleaning, is the use of ultrasonic frequency of the upper half-wave work, with strong cleaning characteristics, can effectively remove the surface of the macromolecule dirt.
Wave-changing effect: because the frequency of ultrasound is different, the effect of cavitation is different, the higher the frequency, the smaller the bubble produced, and the stronger the penetration, but the corresponding force is smaller. The lower the frequency, the larger the bubble, the weaker the penetration, but the stronger the cleaning force. So the effect of wave change is used to change the cleaning effect.
Degassing: the principle of degassing: when ultrasound is introduced into a solution, it produces an alternating pressure, the acoustic wave used for cavitation threshold can produce cavitation bubbles when propagating in liquid and can significantly improve the mass transfer rate of gas from solution to bubbles. Cavitation bubbles are produced by tiny gas nuclei in solution, which are produced by the action of tensile stress (negative pressure) in the rarefied phase of sound waves. If the tensile stress persists after the cavitation bubble is formed, the cavitation bubble will expand to many times the initial size.
In this case, the cavitation bubble remains spherical structure and then continues to grow, vibration, and collapse. At the Sonication stage, the gas components in the solution can enter the cavitation bubble through the "Directional diffusion" of the gas-liquid interface, and the gas escapes from the bubble, causing degassing. Degassing effect: Liquid Air Discharge, reduce the resistance of the bubbles generated by ultrasonic cavitation reaction, and enhance the cleaning efficiency of the ultrasonic cleaning machine. There is a role is the ultrasonic cleaning machine will produce a long time of ultrasonic fatigue, reduce the cleaning effect and efficiency, degassing function can also eliminate this ultrasonic fatigue.