超聲波引入溶液中時(shí)，會(huì)產(chǎn)生交替壓力，用于空化閾的聲波在液體中傳播時(shí)能夠產(chǎn)生空化氣泡并且能顯著提高氣體從溶液中到氣泡的傳質(zhì)速率。空化氣泡由溶液中微小的氣核產(chǎn)生，在聲波的稀疏相內(nèi)由于張應(yīng)力（負(fù)壓力）的作用會(huì)產(chǎn)生這些空泡。

When the ultrasonic wave is introduced into the solution, it will generate alternating pressure. When the sound wave used for cavitation threshold propagates in the liquid, it can generate cavitation bubbles and significantly improve the mass transfer rate of gas from the solution to the bubbles. Cavitation bubbles are generated by tiny gas nuclei in the solution. These bubbles will be generated in the sparse phase of sound wave due to the effect of tensile stress (negative pressure).

如果張應(yīng)力在空泡形成后繼續(xù)存在，此時(shí)空化泡就會(huì)擴(kuò)張到初始尺寸的許多倍。在這種情況下，空化泡保持球形結(jié)構(gòu)，之后不斷地增長(zhǎng)、振動(dòng)、崩潰。超聲波作用時(shí)，溶液中氣體成分可通過(guò)氣-液界面“定向擴(kuò)散”進(jìn)入空化氣泡，空化氣泡進(jìn)人生長(zhǎng)階段，當(dāng)空化氣泡在溶液表面崩潰時(shí)，氣體會(huì)從氣泡中逸出，這就造成了脫氣作用。

If the tensile stress continues to exist after the cavitation is formed, the cavitation bubble will expand to many times its initial size. In this case, the cavitation bubble maintains a spherical structure, and then grows, vibrates and collapses continuously. Under the action of ultrasonic, the gas components in the solution can enter the cavitation bubble through the "directional diffusion" of the gas-liquid interface, 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, resulting in degassing.

超聲波脫氣設(shè)備優(yōu)點(diǎn)，泡沫為氣泡的大量聚集，超聲波脫氣氣設(shè)備是在泡沫生成前期、氣泡未大量聚集前對(duì)液體進(jìn)行消泡、脫氣，或是對(duì)溶解、混合在液體內(nèi)的氣體進(jìn)行消泡、脫氣。

Advantages of ultrasonic degassing equipment: foam is a large number of bubbles gathered. Ultrasonic degassing equipment is used to defoaming and degassing the liquid in the early stage of foam generation and before a large number of bubbles gather, or to defoaming and degassing the gas dissolved and mixed in the liquid.

整個(gè)過(guò)程不使用任何消泡劑，是完全的物理消泡方式，也可稱(chēng)作機(jī)械消泡方式。對(duì)于已經(jīng)生成的表面泡沫，該設(shè)備作用不明顯，需要配合消泡膜方式共同加以解決。

The whole process does not use any defoaming agent, which is a complete physical defoaming method, also known as mechanical defoaming method. For the generated surface foam, the equipment has no obvious effect, which needs to be solved together with the defoaming film method.

脫氣主要運(yùn)用的是超聲的“定向擴(kuò)散”，一旦產(chǎn)生空化，內(nèi)部還是有空氣，在一些熔融液脫氣純化應(yīng)用中以不產(chǎn)生空化佳。

Degassing mainly uses ultrasonic "directional diffusion". Once cavitation occurs, there is still air inside. In some applications of degassing and purification of molten liquid, it is best not to produce cavitation.

液體的空氣排掉，減少超聲波空化反應(yīng)產(chǎn)生的氣泡的阻力，增強(qiáng)超聲波清洗機(jī)的清洗效率。還有一種作用就是超聲波清洗機(jī)工作時(shí)間久了會(huì)產(chǎn)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。

The liquid air is discharged, which reduces the resistance of bubbles generated by ultrasonic cavitation reaction and enhances the cleaning efficiency of ultrasonic cleaning machine. Another function is that the ultrasonic cleaning machine will produce a kind of ultrasonic fatigue after working for a long time, which will reduce the cleaning effect and efficiency. The oxygen and degassing function can also eliminate this kind of ultrasonic fatigue.

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

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

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