As is well known, the completion of the cleaning effect of ultrasonic cleaning machines mainly relies on the "cavitation effect". Therefore, the quality of the "cavitation" effect can affect the functionality of the machine; The level of machine functionality determines the cleaning effect. To achieve the intention of cleaning, one should trace its roots back to its source, so the influencing factors of cavitation effect cannot be ignored. Next, let's talk about the selection of frequency for ultrasonic cleaning machines.

Generally speaking, even if ultrasonic waves are introduced into the cleaning solution, cavitation bubbles can still occur; Even if cavitation bubbles occur, they are bound to completely burst; Even if it explodes, it is certain to achieve outstanding results in removing dirt.

Each liquid has its own 'cavitation threshold'. It is only when the negative pressure generated by ultrasonic vibration exceeds the static pressure of the liquid itself that it tears open and forms a vacuum bubble. The ultrasonic cavitation threshold is closely related to the ultrasonic frequency.

The higher the frequency, the higher the cavitation threshold. Due to the higher frequency of ultrasound, its energy will be very low, and there will not be as much force to tear open the liquid and form bubbles. So high-frequency ultrasound is not easy to form cavitation bubbles in liquids, and to cause cavitation, it is necessary to increase the sound power.

Conversely, the lower the frequency, the easier it is for cavitation to occur. Moreover, as the frequency decreases, the time distance between tearing and squeezing increases significantly. The generated bubbles have enough time to complete their growth and expand from small to large, resulting in a greater impact force when they explode, which is more conducive to cleaning.

High frequency and low frequency, like a horse running fast but with little strength, cannot pull too many heavy objects; And cows run very slowly, but they have great strength. They can stroll leisurely with a large cart of goods, and each has its own purpose.

We can divide the ultrasonic frequency into three frequency bands based on the cleaning target: low frequency (20KHz-50KHz), high frequency (50KHz-200KHz), and ultra-high frequency (above 700KHz-1MHz). At the same power, ultrasonic waves with a frequency of 40KHz generate more cavitation bubbles and have stronger penetration ability than ultrasonic waves with a frequency of 100KHz. However, they are prone to corrosion and damage to the surface of the instrument, and the noise is also greater.

Therefore, high-frequency ultrasound is suitable for cleaning fine and precise instruments, while low-frequency ultrasound is suitable for cleaning coarse and solid instruments. Knowing this knowledge, I believe that when using an ultrasonic cleaning machine to clean items, one can select the corresponding frequency in a targeted manner, and better utilize the effectiveness of the ultrasonic cleaning machine.

Article source: Kaiping ultrasonic cleaning machine http://www.kpzfcsb.com/