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Cleaning is an essential task in both daily life and industrial production. The quality of cleaning directly affects the performance and service life of products, from precision electronic components to everyday eyewear and jewelry, from complex mechanical parts to various optical instruments. Ultrasonic cleaning machines, with their unique cleaning principles and efficient cleaning effects, are gradually becoming the "star products" in the cleaning field.
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1¡¢ Development process: a leap from theory to application
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The development of ultrasonic cleaning technology can be traced back to the early 20th century. In 1914-1918, Langevin invented the sandwich piezoelectric transducer, laying the foundation for the development of ultrasonic technology. In the 1920s, Mason invented a variable amplitude rod that, when connected to a transducer, can generate high-intensity ultrasonic vibrations. In the 1930s, American radio company technicians proposed ultrasonic cleaning technology. China's ultrasonic cleaning devices began in the early 1950s and were initially mainly used in fields such as electronics, optics, and medicine. With the continuous development of technology, in the 1970s and 1980s, the United States and Europe widely applied ultrasonic technology to industrial production. In the late 1990s, there were various types of ultrasonic cleaning equipment, and the technology gradually matured. The proportion of high-frequency ultrasonic cleaning equipment also increased.
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2¡¢ Working principle: magical "cavitation effect"
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The working principle of ultrasonic cleaning machine is mainly based on the "cavitation effect" of ultrasonic waves. Ultrasonic waves are sound waves with frequencies higher than 20000 hertz, which have the characteristics of good directionality, strong penetration ability, and easy acquisition of concentrated sound energy. When ultrasound propagates in liquid, it causes microbubbles in the liquid to remain vibrating under the action of sound waves. When the pressure is reduced, vacuum nucleus bubbles are generated in the liquid; When subjected to compressive force, the vacuum core bubble is crushed by pressure to generate a strong impact force, which can peel off the dirt on the surface of the cleaned object and achieve precise cleaning.
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In addition to cavitation, ultrasound also produces direct flow and acceleration effects in liquids. Direct flow can stir the micro oil dirt on the surface of the cleaned object, promote the convection of the cleaning solution on the dirt surface, accelerate the fusion of the dissolved liquid and the new liquid, and play a role in transporting the dirt. For high-frequency ultrasonic cleaning machines, the acceleration effect relies on the acceleration of liquid particles under ultrasonic action to collide with particles for ultra precision cleaning of dirt.
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3¡¢ Structure composition: Three major modules work together
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The simplest ultrasonic cleaning equipment consists of three modules: ultrasonic generator, transducer, and cleaning tank.
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The function of an ultrasonic generator is to generate and provide ultrasonic energy to the transducer, converting the mains power into high-frequency AC signals that match the ultrasonic transducer. It is like the "heart" of an ultrasonic cleaning machine, providing power support for the entire cleaning process. The automatic frequency tracking and amplitude control characteristics are crucial, as they can adjust the output power according to the load and tool wear, ensuring cleaning quality and protecting the ultrasonic system.
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The transducer mainly converts the electrical power input by the ultrasonic generator into high-intensity mechanical vibration power and transmits it to the cleaning tank. In high-power ultrasonic cleaning machines, multiple transducers are often combined to form a transducer array to improve acoustic and electrical efficiency and enhance cleaning effectiveness. Common transducers include piezoelectric transducers and magnetostrictive transducers.
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The cleaning tank is usually made of stainless steel plate. The steel plate at the junction of the transducer and the cleaning tank should not be too thick, otherwise it will reduce the loss of sound energy. The bonding surface needs to be sandblasted to ensure that the transducer and the cleaning tank wall are firmly adhered. When the inner wall of the cleaning tank comes into contact with the cleaning solution, it needs to be polished to reduce cavitation corrosion of the cleaning tank.
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4¡¢ Diverse categories: meeting different needs
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According to different purposes, ultrasonic cleaning machines can be divided into industrial, commercial, laboratory, and household ultrasonic cleaning machines. Industrial ultrasonic cleaning machines are mainly used for cleaning mechanical components, electronic components, etc., and have the characteristics of high power and high cleaning efficiency; Commercial ultrasonic cleaning machines are commonly used in eyewear stores, jewelry stores, etc. to clean some small items; The laboratory ultrasonic cleaning machine requires high cleaning accuracy and can meet the cleaning needs in scientific research experiments; The household ultrasonic cleaning machine is easy to operate and compact in size, suitable for cleaning daily utensils, fruits, glasses, etc.
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According to the degree of automation, it can be divided into fully automatic, semi-automatic, and manual ultrasonic cleaning machines. The fully automatic ultrasonic cleaning machine can achieve one click operation, automatically completing a series of processes such as cleaning, rinsing, drying, etc; The semi-automatic ultrasonic cleaning machine requires manual assistance to complete some operations; Manual ultrasonic cleaning machines mainly rely on manual control of the cleaning process.
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In addition, ultrasonic cleaning machines can be classified according to capacity, number of tanks, and cleaning agents used. Different types of ultrasonic cleaning machines meet the diverse cleaning needs of various industries.
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5¡¢ Significant advantages: efficient, environmentally friendly, and safe
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Ultrasonic cleaning machines have many advantages. Firstly, it has high cleaning efficiency and can quickly remove various types of dirt. The cleaning speed is several times or even dozens of times faster than traditional cleaning methods. Secondly, the cleaning effect is good, which can deeply clean the fine gaps and holes on the surface of objects, achieving a cleanliness level that traditional cleaning methods cannot achieve, especially suitable for cleaning parts with complex surface shapes. Furthermore, ultrasonic cleaning machines can reduce the amount of chemical solvents used during the cleaning process, lower environmental pollution, and are more environmentally friendly. Moreover, it adopts a physical cleaning method, which causes minimal damage to the cleaned object and ensures the safety of the item.
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With the continuous advancement of technology, ultrasonic cleaning machines will develop towards higher efficiency, economy, and intelligence. In the future, we are expected to see more new types of ultrasonic cleaning equipment, bringing more convenience to our lives and production.
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