随着生活水平的不断提高，超声波清洗机的使用频率越来越来多，那如何选择一台好的超声波清洗机，给人们带来很多的麻烦，不知从哪些方面着手，特别是外行人。

With the continuous improvement of living standards, more and more ultrasonic cleaning machines are used. How to choose a good ultrasonic cleaning machine brings people a lot of trouble. I don't know what to start from, especially the layman.

超声波清洗机有两种方式进行清洗工作，是低频清洗，另是高频清洗，这两种不同的清洗方法针对的是工件，清洗的程度不同。低频清洗和高频清洗有什么特点？

Ultrasonic cleaning machine has two ways of cleaning, low frequency cleaning and high frequency cleaning. These two different cleaning methods are aimed at the workpiece, and the degree of cleaning is different. What are the characteristics of low frequency cleaning and high frequency cleaning?

1. 低频清洗

1. Low frequency cleaning

低频清洗超声波清洗机适用于大型、重型零件，或一些高密度材料，其频率会很低，不会对工件表面造成任何损伤。

Low frequency cleaning ultrasonic cleaning machine is suitable for large, heavy parts, or some high-density materials, its frequency will be very low, will not cause any damage to the surface of the workpiece.

所以低频超声波清洗机合用于大部件表面或者污物和清洗件表面结合度高的场合。但易侵蚀清洗件表面，不相宜清洗表面光洁度高的部件，而且空化噪音大。４０ ＫＨＺ左右的频率，在相同声强下，产生的化泡数目比频率为２０ＫＨＺ时多，穿透力较强，宜清洗表面外形复杂或有盲孔的工件，空化噪音较小，但空化强度较低，适合清洗污物与被清洗件表面结协力较弱的场合。

Therefore, low frequency ultrasonic cleaning machine is suitable for large parts surface or high combination of dirt and cleaning parts surface. But it is easy to erode the surface of the cleaning parts, so it is not suitable to clean the parts with high surface finish, and the cavitation noise is large. When the frequency is about 40KHz, under the same sound intensity, the number of bubbles generated is more than that of 20kHz, and the penetration is strong. It is suitable to clean the workpiece with complex surface shape or blind hole. The cavitation noise is small, but the cavitation intensity is low. It is suitable for the occasions where the cleaning dirt and the surface of the cleaned part have weak cooperation.

2. 高频清洗

2. High frequency cleaning

高频清洗的特点是在功率不变的情况下，使空化泡变小，使释放的能量相对减少。因此，可以减少粘性边界层，减少工件表面损伤。

The characteristic of high frequency cleaning is that the cavitation bubble becomes smaller and the released energy is relatively reduced under the condition of constant power. Therefore, the viscous boundary layer can be reduced and the surface damage of the workpiece can be reduced.

适用于计算机，微电子元件的精细清洗；兆赫超声清洗合用于集成电路芯、硅片及波薄膜的清洗，能去除微米、亚微米级的污物而对清洗件没有任何损伤。因此从清洗效果及经济性考虑，频率一般选择在２０—１３０ＫＨＺ范围，当然准确选择频率关重要需要做一定的实验取得

It is suitable for the fine cleaning of computer and microelectronic components; megahertz ultrasonic cleaning is suitable for the cleaning of integrated circuit core, silicon wafer and wave film, which can remove micron and submicron scale dirt without any damage to the cleaning parts. Therefore, from the cleaning effect and economic considerations, the frequency is generally selected in the range of 20-130khz. Of course, the accurate selection of frequency is very important, and it needs to do some experiments

对于超声波清洗机来说，低频清洗和高频清洗是其有效的清洗方法。只是不同的工作有不同的选择。另外，需要注意的是，当低频低到一定程度时，可能会产生较大的噪声。

For ultrasonic cleaning machine, low frequency cleaning and high frequency cleaning are effective cleaning methods. It's just that different jobs have different choices. In addition, it should be noted that when the low frequency is low to a certain extent, large noise may be generated.