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Introduction to the principles, classifications, advantages and disadvantages of centrifugal atomizers
Release time：
2025-12-01 13:41:11
Atomizer is an instrument that converts liquid into micron-sized droplets, so it appears foggy on a macro scale. According to different uses, centrifugal atomizers can be mainly divided into air humidifiers and medical atomizers, also called atomizers or atomizers. Air humidifiers are used to improve the relative humidity of indoor air, and medical nebulizers are mainly used to treat upper and lower respiratory system diseases.
Centrifugal atomizerPrinciple: 1. Compress the centrifugal atomizer to make the compressed air or oxygen pass through the orifice of the pores at high speed. According to the Venturi effect, negative pressure will be generated near the orifice, causing the liquid medicine in the storage tank to hit the barrier with the high-speed airflow and be crushed into liquid particles of different sizes. Then after secondary screening, most of the particles with larger diameters will fall back into the liquid storage tank to wait for atomization again, while the particles with smaller diameters will be sprayed out at a medium speed. Generally speaking, the air flow rate of a compressed atomizer is 6L/min-8L/min, and the volume of the drug in the storage tank is about 5ml, which can produce ideal aerosol particles. The diameter of the aerosol particles produced by the compression atomizer is generally between 3 microns and 7 m, and the particles with a diameter of 5 microns are generally more than 50%, and some brands can reach more than 65%; 2. Ultrasonic centrifugal atomizer, through the high-frequency vibration of the ultrasonic thin plate, destroys the surface tension of the medicinal liquid, turning the medicinal liquid into aerosol particles, and its vibration frequency is inversely proportional to the particle size, that is, the lower the vibration frequency, the larger the liquid particle size, and vice versa. The intensity of vibration determines the density of atomized particles. The greater the vibration intensity, the greater the density of the particles. The size of the aerosol particles generated by the ultrasonic nebulizer is between 3 microns and 10 microns, and the sedimentation rate of the liquid inhaled into the lungs is between 2% and 12%. It should be noted that due to the high density of aerosols produced by ultrasonic nebulizers and the large median diameter of particles, patients with pulmonary heart disease are prone to shortness of breath or even suffocation due to low oxygen in the body. Replacing a compression nebulizer can avoid such problems to a large extent. The patient experience is significantly better than that of a superconducting nebulizer, and the clinical effect is also better than that of a superconducting nebulizer. 3. Mesh centrifugal atomizer is a new type of atomizer developed in recent years, which combines the principles and characteristics of ultrasonic atomizer and compression atomizer. A clean atomizer has a nozzle design with thousands of holes approximately 3 microns in diameter. During operation, the medicinal liquid is initially atomized by the tiny ultrasonic vibration generated by the vibrator, and then the medicinal liquid is extruded from the hole through the mesh nozzle to achieve secondary atomization, forming aerosol particles with smaller diameters. The diameter of atomized particles is concentrated between 3 microns and 7 microns. Particles with a diameter of 5 microns generally account for more than 50%, and some brands can reach 60%-90%. They are mainly used for atomization treatment of children.
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