An ultrasonic atomizer converts liquid into a fine mist using a generator and probe. The power supply converts low-frequency energy into high-frequency energy, creating vibrations that split the liquid into droplets. The atomizer has advantages over traditional methods and can be used for various applications.
An ultrasonic atomizer is a device that converts a normal stream of liquid into a very fine mist. It consists of a generator and a probe. The generator creates vibrations and concentrates them at the tip of the probe. As liquid flows through the probe, it is converted into fine particles. The ultrasonic atomizer is often used in manufacturing applications, such as coating fabrics, adding moisture to a gas stream, and injecting small amounts of liquid into a reactor.
The ultrasonic atomizer has a power supply that converts low-frequency electric energy into high-frequency electric energy. This electrical energy is then converted into mechanical vibrations by a piezoelectric transducer, which is typically ceramic. The vibration is sent back to the piezoelectric transducer after it bounces off the probe tip. This increases the strength of the vibration and creates a pumping action which pulls the liquid towards the center of the probe.
The liquid is introduced into the probe through a side inlet, usually by gravity or a low pressure pump. There are different probes for different applications. A flat-tip probe, for example, can focus particles to a specific location. A wide dispersion probe has an extended spray range, making it ideal for coating applications, and a radial probe is typically used to spray the inside walls of holes.
As liquid passes through the probe, it widens and flattens. The vibrations split the liquid into individual droplets. The size of the drop depends on the frequency of the electricity. The higher the frequency of the electrical energy, the stronger the vibrations produced by the piezoelectric transducer. Stronger vibrations produce smaller droplets.
When the droplets reach the tip of the probe, they are sprayed. The spray rate depends on the viscosity of the liquid and the frequency of the electrical energy. The higher the frequency and the viscosity, the lower the flow rate.
The ultrasonic atomizer has several advantages over traditional methods used to disintegrate liquids. Because the ultrasonic atomizer can accurately deliver a uniform spray, manufacturers can efficiently use raw materials and reduce pollution. The probe typically does not clog and is easy to clean. This allows atomization of different types of liquids, without the risk of contamination or probe erosion. Liquids containing long-chain polymers, however, are difficult to atomize due to their strong cohesive properties.
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