< br / > < / span > < / p > < br / > < span style = "font - size: 16 px; Whether ultrasonic cleaners are harmful or not is relative. To clarify this issue, it is necessary to first understand the principle of ultrasonic cleaning. Ultrasonic cleaning utilizes the cavitation effect of ultrasonic waves in liquids and secondary effects, such as the direct current water inflow acceleration effect, mechanical effect and thermal effect, to directly or indirectly act on the workpiece to be cleaned, causing the dirt on the workpiece to peel off and achieving the purpose of high-cleanliness cleaning. Unlike infrasonic waves, ultrasonic waves have the characteristics of high frequency, good directionality, strong penetration ability, strong effect in the medium of transmission, no ion radiation risk, and little impact on the human body. A good example is that medical ultrasonic diagnosis and treatment equipment adopts the principle of ultrasonic waves. Infrasound may cause internal organ vibrations, and severe and intense resonance can lead to death.



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