When the ultrasonic wave is introduced into the solution, the alternating pressure will be generated. When the acoustic wave for cavitation threshold propagates in the liquid, cavitation bubbles can be generated and the mass transfer rate of gas from the solution to the bubbles can be significantly improved. Cavitation bubbles are generated by tiny gas nuclei in the solution, and these bubbles will be generated due to the action of tensile stress (negative pressure) in the sparse phase of the acoustic wave. If the tensile stress continues to exist after the formation of the cavitation bubble, the cavitation bubble will expand to many times the initial size. In this case, the cavitation bubble maintains a spherical structure, and then continuously grows, vibrates and collapses. Under the action of ultrasound, the gas components in the solution can enter the cavitation bubble through the gas-liquid interface "directional diffusion", and the cavitation bubble enters the growth stage. When the cavitation bubble collapses on the surface of the solution, the gas will escape from the bubble, which causes degassing.

脫氣超聲波清洗機

Degassing ultrasonic cleaning machine

超聲波脫氣設備優點，泡沫為氣泡的大量聚集，超聲波脫氣氣設備是在泡沫生成前期、氣泡未大量聚集前對液體進行消泡、脫氣，或是對溶解、混合在液體內的氣體進行消泡、脫氣。整個過程不使用任何消泡劑，是完全的物理消泡方式，也可稱作機械消泡方式。對于已經生成的表面泡沫，該設備作用不明顯，需要配合消泡膜方式共同加以解決。

Advantages of ultrasonic degassing equipment: foam is a large number of bubbles. Ultrasonic degassing equipment is used to defoaming and degassing the liquid at the early stage of foam generation and before the bubbles are accumulated in large numbers, or to defoaming and degassing the gas dissolved and mixed in the liquid. The whole process does not use any defoamer. It is a complete physical defoamer, also known as mechanical defoamer. For the surface foam that has been generated, the effect of this equipment is not obvious, and it needs to be solved together with defoaming film.

脫氣主要運用的是超聲的“定向擴散”，一旦產生空化，內部還是有空氣，在一些熔融液脫氣純化應用中以不產生空化更佳。液體的空氣排掉，減少超聲波空化反應產生的氣泡的阻力，增強超聲波清洗機的清洗效率。還有一種作用就是超聲波清洗機工作時間久了會產生一種超聲波疲勞，減低清洗效果和效率，排氧脫氣功能還可以消除這種超聲波疲勞。

Ultrasonic "directional diffusion" is mainly used for degassing. Once cavitation occurs, there is still air inside. In some degassing and purification applications of molten liquid, it is better not to generate cavitation. The air of the liquid is discharged to reduce the resistance of the bubbles generated by the ultrasonic cavitation reaction and enhance the cleaning efficiency of the ultrasonic cleaner. Another function is that the ultrasonic cleaning machine will produce ultrasonic fatigue after working for a long time, reducing the cleaning effect and efficiency. The oxygen exhaust and degassing function can also eliminate this ultrasonic fatigue.

綜上，可以看出超聲波清洗設備的脫氣功能是非常強大的，能更好的達到清洗目的，提高清洗效果。

In conclusion, it can be seen that the degassing function of the ultrasonic cleaning equipment is very powerful, which can better achieve the cleaning purpose and improve the cleaning effect.

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