As we all know, ultrasonic cleaner needs to be equipped with ultrasonic cleaning liquid to achieve a greater cleaning effect. Then how should we define its cleaning conditions?

        Bubbles are produced when high-frequency (ultrasonic frequency) and high-intensity sound waves are applied to a liquid. Therefore, any ultrasonic cleaning system must have three basic components: the tank for holding the cleaning solution, the transducer that converts electrical energy into mechanical energy, and the ultrasonic generator that generates high-frequency electrical signals.

        Theoretically, a burst cavitation bubble can generate a pressure of over 10,000 psi and a temperature of 20,000 °F (11,000 °C), and at the moment of its burst, the shock wave will rapidly radiate outward. The energy released by a single cavitation bubble is very small, but when several million cavitation bubbles burst simultaneously every second, the cumulative effect will be extremely strong. The powerful impact force generated will peel off the dirt on the surface of the workpiece. This is the characteristic of all ultrasonic cleaning.  

        If the ultrasonic energy is large enough, cavitation will occur throughout the cleaning solution, so ultrasonic waves can effectively clean tiny cracks and holes. Cavitation also promotes chemical reactions and accelerates the dissolution of surface films.

        However, cavitation will only occur in a certain area when the liquid pressure in that area is lower than the gas pressure within the bubble. Therefore, the ultrasonic amplitude generated by the transducer must be large enough to meet this condition. The minimum power required to generate cavitation is called the cavitation critical point. Different liquids have different cavitation critical points, so the ultrasonic energy must exceed this critical point to achieve the cleaning effect. That is to say, cavitation bubbles can only be generated when the energy exceeds the critical point for ultrasonic cleaning.