How do Ultrasonic Humidifiers Work?

Keeping the right amount of humidity level in your home can be a challenge, especially during the dry winter months. Fortunately, you can use a humidifier to help combat low moisture levels inside your home.

Ultrasonic humidifiers are a relatively new technology that allow you to humidify a space while using less energy than any other types of humidifiers. In this article, we will discuss how ultrasonic humidifiers actually work and look at the benefits of using them.

The ultrasonic humidifier is a device that adds moisture to the air. It does this by using a metal or ceramic diaphragm that vibrates at high frequencies, extremely fast inside a pool of water. 

As the diaphragm vibrates, microscopic water droplets are being produced. A fan blows these droplets into your room where they evaporate to add humidity to the air you are breathing.

In an ultrasonic humidifier, the real magic is happening at the piezoelectric transducer.

A piezoelectric transducer is a tool that converts electrical energy to high-frequency vibrations. The piezoelectric transducer connects to a diaphragm that vibrates against water. As the diaphragm vibrates against the water, mist droplets are created.

How ultrasonic atomization produces humidity

Ultrasonic atomization is the method that ultrasonic humidifiers use to create humidity. The principle is based on harnessing the power of 2 principles:

  1. Cavitation bubble implosions. Tiny cavitation bubbles are produced when a vibrating surface changes its amplitude.

  2. Capillary wave theory. Rayleigh surface waves are created by the vibrating surface. The crests of these waves emit small mist droplets into the air.

By using these two phenomena, ultrasonic humidifiers produce mist and humidity for your atmosphere for long periods of time while using minimal amounts of energy.

To create humidity, the piezoelectric transducer vibrates against water. As the vibration speed increases rapidly to a rate where water particles cannot cling to the diaphragm, a momentary vacuum and compression occurs. In this instant, air bubbles form via the process of cavitation.

When cavitation occurs, broken capillary waves are made, and tiny mist droplets break above the surface of the water and dissipate into your air.


Get your ultrasonic humidifier today