一、聲波的頻率

　　1、 The frequency of sound waves

　　<1>  小于20Hz，次聲波；

　　<1> Less than 20Hz, infrasound waves;

　　<2>  20-20000Hz，（人類能聽到正常）聲波；

　　<2> 20-20000Hz, (normal sound waves that humans can hear);

　　<3>  大于20000Hz，超聲波；

　　<3> Greater than 20000Hz, ultrasonic;

　　二、超聲波的組成：換能器（震子）+發生器（控制箱）

　　2、 Composition of ultrasonic waves: transducer (oscillator)+generator (control box)

　　三、超聲波清洗機的清洗原理

　　3、 The cleaning principle of ultrasonic cleaning machine

　　與碳氫清洗機不同，當超聲波電源將50Hz的日常供電頻率改變為28KHz后，通過輸出電纜線將其輸送給粘接在盛放清洗劑溶液的清洗槽底部的超聲波換能器，由換能器將高頻的電能轉換成機械振動并發射至清洗液中。當高頻的機械振動傳播到液體里后，清洗液內即產生上述空化現象，達到清洗的目的。由于超聲波的頻率很高，在液體中所產生的空化作用可以達到28000次/秒，幾乎可以說是不斷地在進行，在液體中由于空化現象所產生的氣泡數量眾多且無所不在，因此對于工件的清洗可以非常徹底（在工業清洗機上應用廣泛），即使是形狀復雜的工件內部，只要能夠接觸到溶液，就可以得到徹底的清洗，又因為每個氣泡的體積非常微小，因此雖然它們的破裂能量很高，但對于工件和液體來說，不會產生機械破壞和明顯的溫升。

　　Unlike hydrocarbon cleaning machines, when the ultrasonic power supply changes the daily power frequency from 50Hz to 28KHz, it is transmitted to the ultrasonic transducer attached to the bottom of the cleaning tank containing the cleaning solution through the output cable. The transducer converts high-frequency electrical energy into mechanical vibration and emits it into the cleaning solution. When high-frequency mechanical vibrations propagate into the liquid, the above-mentioned cavitation phenomenon occurs in the cleaning solution, achieving the purpose of cleaning. Due to the high frequency of ultrasound, the cavitation effect generated in liquid can reach up to 28000 times per second, which can be said to be continuous. The number of bubbles generated by cavitation in liquid is numerous and ubiquitous, so the cleaning of workpieces can be very thorough (widely used in industrial cleaning machines). Even for complex shaped workpieces, as long as they can come into contact with the solution, they can be thoroughly cleaned. Moreover, because the volume of each bubble is very small, although their rupture energy is high, there will be no mechanical damage or significant temperature rise for the workpiece and liquid.

　　50Hz——發生器（控制箱）轉化——28000Hz——換能器（震子）——電能轉換成機械能（振動）——產生空化效應——達到清洗目的

　　50Hz - generator (control box) conversion -28000Hz - transducer (oscillator) - electrical energy converted into mechanical energy (vibration) - generates cavitation effect - achieves cleaning purpose

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