Ultrasonic cleaning is the use of the socialized effect of ultrasound in liquids, the extreme acceleration effect, and the direct inflow effect to directly or indirectly affect the liquid and dirt, causing the dirt layer to be peeled off by the dispersed emulsified electrode and achieving the cleaning purpose. Among the ultrasonic cleaning machines currently used, cavitation and direct inflow are more commonly used.

（1）空化作用：空化作用就是超聲波以每秒兩萬次以上的壓縮力和減壓力交互性的高頻變換方式向液體進行透射。在減壓力作用時，液體中產生真空核群泡的現象，在壓縮力作用時，真空核群泡受壓力壓碎時產生強大的沖擊力，由此剝離被清洗物表面的污垢，從而達到精密洗凈目的。

(1) Cavitation: Cavitation refers to the high-frequency transformation of ultrasonic waves into a liquid through the interaction of compression force and pressure reduction at least 20000 times per second. During pressure reduction, a phenomenon of vacuum core bubbles is generated in the liquid. When compressed, the vacuum core bubbles generate a strong impact force when crushed by pressure, thereby stripping the dirt on the surface of the cleaned object and achieving precision cleaning.

（2）直進流作用：超聲波在液體中沿聲的傳播方向產生流動的現象稱為直進流。聲波強度在0.5W/cm2時，肉眼能看到直進流，垂直于振動面產生流動，流速約為10cm/s。通過此直進流使被清洗物表面的微油污垢被攪拌，污垢表面的清洗液也產生對流，溶解污物的溶解液與新液混合，使溶解速度加快，對污物的搬運起著很大的作用。

(2) Direct inflow: The phenomenon of ultrasonic waves flowing in the direction of sound propagation in a liquid is called direct inflow. When the sound wave intensity is 0.5W/cm2, the naked eye can see a direct inflow, which generates flow perpendicular to the vibration surface, and the flow velocity is about 10cm/s. Through this direct inflow, the micro oil and dirt on the surface of the cleaned object are stirred, and the cleaning solution on the dirt surface also generates convection. The dissolved solution of the dirt is mixed with the new solution, which accelerates the dissolution rate and plays a significant role in the transportation of the dirt.

（3）加速度：液體粒子推動產生的加速度。對于頻率較高的超聲波清洗機，空化作用就很不顯著了，這時的清洗主要靠液體粒子超聲作用下的加速度撞擊粒子對污物進行超精密清洗。

(3) Acceleration: The acceleration generated by the propulsion of liquid particles. For high-frequency ultrasonic cleaning machines, the cavitation effect is not significant. At this time, the cleaning mainly relies on the acceleration of liquid particles under the ultrasonic action to impact particles for ultra precision cleaning of dirt.

應注意以下問題：

The following issues should be noted:

極超聲波清洗機電源及電熱器電源必須有良好接地裝置。

The power supply of the extreme ultrasonic cleaning machine and the power supply of the electric heater must have a good grounding device.

極超聲波清洗機嚴禁無清洗液開機，即清洗缸沒有加一定數量的清洗液，不得合超聲波開關。

It is strictly prohibited to start the extremely ultrasonic cleaning machine without cleaning solution, that is, the cleaning cylinder does not add a certain amount of cleaning solution, and the ultrasonic switch cannot be turned on.

極有加熱設備的清洗設備嚴禁無液時打開加熱開關。

It is strictly prohibited to turn on the heating switch when there is no liquid in the cleaning equipment with extremely heating equipment.

極禁止用重物(鐵件)撞擊清洗缸缸底，以免能量轉換器晶片受損。

It is strictly prohibited to use heavy objects (iron parts) to impact the bottom of the cleaning cylinder to avoid damage to the energy converter chip.

極超聲波發生器電源應單獨使用一路220V/50Hz電源并配裝2000W以上穩壓器。

The power supply of the polar ultrasonic generator should use a separate 220V/50Hz power supply and be equipped with a voltage regulator of over 2000W.

極清洗缸缸底要定期沖洗，不得有過多的雜物或污垢。

The bottom of the extremely clean cylinder should be regularly rinsed without excessive debris or dirt.

極每次換新液時，待超聲波起動后，方可洗件。

When changing the solution every time, wait for the ultrasonic to start before washing the parts.