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At present, the products in the household humidifier market are mainly divided into three categories: ultrasonic humidifiers, direct evaporative humidifiers and thermal evaporative humidifiers:
Ultrasonic technology is a relatively mature technology in the world, which has been widely used in various fields. The ultrasonic humidifier uses ultrasonic high-frequency vibration to atomize water into 1-5 μ m ultrafine particles. The water mist is diffused into the air through the pneumatic device, making the air moist and accompanied by rich negative oxygen ions, which can clean the air, improve health, change the dry heat of the heating in winter, and create a comfortable living environment. According to experts, the advantages of ultrasonic humidifier are high humidification intensity, uniform humidification and high humidification efficiency; Energy saving and electricity saving, the power consumption is only 1/10 to 1/15 of the electric humidifier; Long service life, automatic humidity balance, water free automatic protection; It also has the functions of medical atomization, cold compress bath surface and jewelry cleaning. The disadvantage is that there are certain requirements for water quality.
Direct evaporative humidifier is also commonly referred to as pure humidifier. Pure humidification technology is a new technology just adopted in the field of humidification. The pure humidifier removes calcium and magnesium ions in water through molecular sieve evaporation technology, and completely solves the problem of "white powder". The water curtain is used to wash the air. The air is humidified and purified at the same time, and then the wet and clean air is sent to the room through the pneumatic device, so as to improve the environmental humidity. At the same time, the new humidifier is not limited by water quality; The filter evaporator is made of imported single fiber, which can filter air and kill bacteria, making humidification more pure; With an air circulation system, while humidification, clean water is used to wash the air, effectively removing the pollution in the air, purifying the air, promoting indoor air circulation, and ensuring human health to a greater extent.

Thermal humidifier is also called electric heating humidifier. Its working principle is to heat the water in the heating body to 100 degrees, generate steam, and send the steam out with the motor. Therefore, electric heating humidifier is the simplest humidification method in technology. Its disadvantages are high energy consumption, no dry burning, low safety factor and easy scaling on the heater. The market outlook is not optimistic.
Compared with the above three, the electric heating humidifier has no "white powder" phenomenon in use, low noise, but large power consumption, and it is easy to scale on the humidifier; The pure humidifier has no "white powder" phenomenon or scaling, low power, air circulation system, which can filter air and kill bacteria; The ultrasonic humidifier has large and uniform humidification intensity, low power consumption, long service life, and functions of medical atomization, cold compress bath surface, jewelry cleaning, etc., but it has certain requirements for water quality, and there will be a slight "white powder" phenomenon in use. Therefore, ultrasonic humidifier and pure humidifier are recommended first choice.