空化效应是决定清洗效果的主要因素，而超声波频率则直接影响着空化效果，一般产生空化效应的超声波频率以20KHz-80KHz为适合。

Cavitation effect is the main factor to determine the cleaning effect, and the ultrasonic frequency directly affects the cavitation effect. Generally, the ultrasonic frequency for cavitation effect is 20khz-80khz.

频率与液体中气泡的直径成反比，与渗透性成正比。频率越高，波长较短，空泡直径小，爆炸压力低，渗透性好，适合于表面光滑度高、精细工件的清洗。另外，频率也不能过高，否则波长减短，空化作用反而会减弱，从而降低清洗效率。

The frequency is inversely proportional to the diameter of the bubble in the liquid and directly proportional to the permeability. The higher the frequency is, the shorter the wavelength is, the smaller the bubble diameter is, the lower the explosion pressure is, and the better the permeability is. In addition, the frequency should not be too high, otherwise the wavelength will be shortened, the cavitation effect will be weakened, thus reducing the cleaning efficiency.

反之，超声波频率越低，在液体中产生空化越容易，产生的力度大，作用也越强，适用于表面粗糙且较难清洗的污垢。超声波频率还影响着工作时所产生的高频噪声，频率越低，噪声越大，一般在满足清洗效果的前提下，尽量选择较高的频率。

On the contrary, the lower the ultrasonic frequency is, the easier it is to produce cavitation in the liquid, and the greater the force is, and the stronger the effect is. It is suitable for the dirt with rough surface and difficult to clean. The lower the frequency, the greater the noise. Generally, on the premise of meeting the cleaning effect, choose the higher frequency as far as possible.

基于以上原理：

Based on the above principles:

低频17K-23K：适用于清洗污垢较重或者比较难清洗的工件，且气泡爆破冲击力对工件表面不会造成伤害时，应选择低频超声波清洗，例如：汽配、纺织等。

Low frequency 17k-23k: suitable for cleaning the workpiece with heavy dirt or difficult to clean, and when the impact force of bubble explosion will not cause damage to the workpiece surface, low frequency ultrasonic cleaning should be selected, such as auto parts, textile, etc.

中频25K-28K：适用于清洗污垢稍重或者清洗易适中，且气泡爆破冲击力对工件表面不会造成伤害时，应选择中频超声波清洗，例如：五金机械、电镀行业等。

Medium frequency 25k-28k: suitable for cleaning with heavy dirt or easy cleaning, and the impact of bubble explosion will not cause damage to the workpiece surface, medium frequency ultrasonic cleaning should be selected, such as: Hardware machinery, electroplating industry, etc.

中高频33K-60K：适用于清洗污垢较轻或清洗较容易，且气泡爆破冲击力对工件表面不会造成伤害时，应选择中高频超声波清洗，例如：光学玻璃、电子元器件等。

Medium and high frequency 33k-60k: suitable for cleaning when the dirt is light or easy to clean, and the impact force of bubble explosion will not cause damage to the workpiece surface, medium and high frequency ultrasonic cleaning should be selected, such as optical glass, electronic components, etc.

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