What are the working principles and precautions for vacuum hydrocarbon cleaning machines?

　　Japan has long been using eco-friendly vacuum hydrocarbon cleaning machines, and they place great importance on energy conservation and environmental protection. Vacuum Hydrocarbon Cleaning Machine Another notable advantage is that the cleaning solvent used by this device is a hydrocarbon solvent. Hydrocarbon solvents are relatively environmentally friendly cleaning agents because their chemical composition is relatively simple and does not contain many complex elements. They are hydrocarbons—fractional distillation products of crude oil—that consist solely of two common elements, carbon (C) and hydrogen (H), though their molecular structures differ.

　　 Vacuum Hydrocarbon Cleaning Machine By utilizing the phenomena of cavitation, acceleration, and direct impingement of ultrasonic waves in liquids, the liquid and contaminants are directly or indirectly affected, causing the contaminant layer to disperse, emulsify, and detach, thereby achieving the purpose of cleaning. Among the vacuum ultrasonic cleaners currently in use, cavitation-based and DC-driven cleaners are relatively widely adopted.

　　(1) Cavitation: Cavitation occurs when ultrasonic waves propagate through a liquid in the form of high-frequency oscillations, with the alternating compression and rarefaction forces acting more than 20,000 times per second. Under the effect of reduced pressure, vacuum nuclei bubbles are generated within the liquid. When subjected to compressive forces, these vacuum nuclei bubbles are crushed by pressure, generating powerful shock waves that effectively dislodge dirt and contaminants from the surface of the object being cleaned, thereby achieving an excellent cleaning effect.

　　During the cleaning process in a vacuum ultrasonic cleaner, the bubbles visible to the naked eye are not vacuum nucleation bubbles—they are ordinary air bubbles. These bubbles inhibit cavitation and reduce cleaning efficiency. Only by completely removing the bubbles from the liquid can the cavitation effect of the vacuum nucleation bubble clusters achieve optimal results.

　　(2) Direct Flow: The phenomenon in which ultrasonic waves flow through a liquid along the direction of sound propagation is referred to as direct flow. When the sound wave intensity reaches 0.5 W/cm², a direct flow perpendicular to the vibrating surface can be observed with the naked eye, with a flow velocity of approximately 10 cm/s. Through this direct flow, fine oil and dirt on the surface of the objects being cleaned are agitated, and convective currents are also generated in the cleaning fluid covering the dirt surface. By mixing the dissolved cleaning solution with fresh liquid, the dissolution rate is accelerated, playing a significant role in effectively removing the dirt.

　　(3) Acceleration: The acceleration generated by the propulsion of liquid particles. For high-frequency vacuum ultrasonic cleaners, the cavitation effect is not pronounced. In such cases, cleaning primarily relies on the acceleration of liquid particles under the action of ultrasound to impact and thoroughly clean the particles.

　　(4) What are “direct” and “indirect” cleaning? Direct cleaning typically refers to the process in which workpieces are cleaned in a cleaning tank filled with a cleaning solution; the workpieces are usually placed on perforated trays or in tool baskets. A limitation of direct cleaning is that the choice of cleaning agents must not cause damage. Vacuum Hydrocarbon Cleaning Machine The cleaning solution for the tank. Indirect cleaning involves placing the workpieces to be cleaned in a beaker or a perforated tray. The beaker or tray is filled with the cleaning solution, rather than being directly immersed in the cleaning tank. When opting for indirect cleaning, make sure the water level in the tank remains at the standard position.

　　(5) Why is a special cleaning solution required for cleaning? The purpose of using a cleaning solution is to break the bond between the dirt and the workpiece; however, water alone cannot achieve an effective cleaning result. The primary function of ultrasonic cavitation is to facilitate cleaning with the aid of a supplementary cleaning solution. Cleaning solutions contain a variety of ingredients that work together to deliver excellent cleaning performance. For example, reducing the surface tension of the liquid can enhance cavitation intensity. In vacuum hydrocarbon cleaning machines, the cleaning fluid will include wetting agents or surfactants as active ingredients.