The working principle of ultrasonic bottle washing machine: The high-frequency oscillation signal emitted by the ultrasonic generator is converted into high-frequency mechanical oscillation by the transducer and propagated to the medium - cleaning solvent. The ultrasonic waves radiate forward in the cleaning solution, causing the liquid to flow and generate tens of thousands of tiny bubbles. These bubbles form and grow in the negative pressure zone where ultrasound propagates longitudinally, and quickly close in the positive pressure zone. In this process known as the "cavitation" effect, the closure of bubbles can form an instantaneous high pressure of over 1000 atmospheres, continuously generating instantaneous high pressure like a series of small "explosions" that constantly impact the surface of the object, causing the dirt on the surface and gaps of the object to quickly peel off, thereby achieving the goal of purifying the surface of the object.
Ultrasonic frequency: The lower the ultrasonic frequency, the easier cavitation is generated in the liquid, the greater the force generated, and the stronger the effect. It is suitable for initial cleaning of workpieces (coarse, dirty). High frequency results in strong directionality of ultrasound, making it suitable for fine object cleaning.
Cleaning temperature: Generally speaking, the cavitation effect of ultrasound is at 30-40 degrees Celsius. The higher the temperature, the more significant the effect of the cleaning agent. Usually, when ultrasonic cleaning is applied in practice, a working temperature of 40-60 degrees Celsius is used.
Cleaning medium: Ultrasonic cleaning is used, and there are generally two types of cleaning agents: chemical solvents, water-based cleaning agents, etc. The chemical action of cleaning media can accelerate the ultrasonic cleaning effect. Ultrasonic cleaning is a physical action that combines the two to thoroughly and effectively clean objects.
Power density: The higher the power density of ultrasound, the stronger the cavitation effect, the faster the speed, and the better the cleaning effect. However, for precision and highly polished objects, prolonged high-power density cleaning can cause "cavitation" corrosion on the surface of the object. The placement of workpieces and the selection of cleaning solution volume during bottle washing machine cleaning generally require the liquid level of the cleaning solution to be at least 100mm higher than the vibration surface. For larger workpieces, stainless steel mesh cages are generally used for cleaning, and the mesh size of the mesh cage is related to the working frequency of ultrasonic waves. Currently, industrial cleaning frequency requirements generally require a mesh size greater than 10mm or more.