In precision manufacturing workshops, an invisible detail - air humidity - is quietly influencing product quality and production efficiency. 

And the wet film humidifier is an efficient solution to this hidden problem.

In modern industrial production, especially in industries such as electronics, textiles, printing, and medicine, air humidity control is of vital 

importance. Inappropriate humidity levels can lead to issues such as static electricity accumulation, material deformation, and microbial 

growth, directly affecting product quality and production efficiency. 

01 Working Principle of Wet Film Humidifier

The core component of the wet film humidifier is the evaporation medium - the wet film. This material is usually made by adding special 

chemical ingredients to plant fibers or glass fibers, and it has good hygroscopicity and wet stretchability.

When the water in the water tank is sent to the water distributor at the top of the humidifier, the water is evenly distributed on the top 

of the wet film and penetrates downward through the wet film material, forming a uniform water film.

When dry air passes through the wet film material, it comes into full contact with the moist surface of the wet film, and the moisture 

evaporates into the air, thus achieving the purpose of humidification. 

02 Four Major Performance Features

The wet film humidifier has several notable features. It boasts a high saturation efficiency, enabling clean humidification, saving space, 

and having a long service life.

The wet film humidifier possesses the characteristic of self-adjusting humidification capacity. Its humidification volume is influenced 

by various factors, including air volume, wet film thickness, wind pressure, wind speed, and parameters such as air temperature and humidity.

This humidifier adopts isenthalpic humidification, meaning it does not consider the enthalpy of water during the humidification process. 

Instead, it adds water with an enthalpy of 0 to the air. This increases the moisture content of the air. However, since the enthalpy remains 

constant, the latent heat increases, resulting in a decrease in sensible heat, thereby achieving a cooling effect.

In addition, the wet film humidifier operates with almost no noise and has a cleaning and filtering effect on the air, effectively purifying it. 

03 Advantages of Wet Film Humidifiers

Wet film humidifiers have many advantages. They have a simple structure, low power consumption, and perform exceptionally well in 

terms of energy saving and water conservation. Additionally, their investment and operating costs are relatively low.

This equipment can provide clean humidification without causing the "white powder" phenomenon. It has a cleaning and filtering effect 

on the air and can effectively purify the air.

Wet film humidifiers have the dual functions of humidification and cooling, and are particularly useful in summer. They produce almost 

no noise and do not interfere with the working environment. 

04 Limitations of Wet Film Humidifiers

Wet film humidifiers also have some limitations. They are relatively large in size but have a relatively small humidification capacity, 

which may restrict their application in large spaces.

Different types of wet film materials have their own problems: Organic wet films have good water absorption and low cost, but they 

are prone to rot and bacteria growth, and need to be replaced annually.

Inorganic glass fiber wet films also have good water absorption, but they are fragile and not convenient for installation and transportation, 

and are currently rarely used.

Aluminum alloy wet films have poor water absorption and low saturation efficiency, high cost, but they do not rot and can be repeatedly 

cleaned, making them suitable for recirculating water humidification systems.

If tap water is used, the wet film is prone to scaling. The scale does not absorb water, which will reduce the evaporation area and sharply 

decrease the humidification capacity. Therefore, the wet film needs to be replaced annually.

Direct drainage wet film humidifiers have low evaporation efficiency and will waste a lot of water during operation. 

05 How to Choose the Right Humidifier with Wet Film

When choosing a humidifier with wet film, several factors need to be considered. First, calculate the required humidification volume. 

Based on the size of the workshop and the humidity requirements, determine the maximum humidification volume to ensure that the 

entire space can reach the desired humidity level.

Select the type of wet film according to the water quality: If using tap water, consider using aluminum alloy or stainless steel wet films. 

These materials are more resistant to scale and can be cleaned and reused.

Consider maintenance costs: Although organic wet films are inexpensive, they need to be replaced annually. Metal wet films have a 

higher initial investment but have a long service life.

Ensure the equipment has necessary safety features: including water shortage protection, overheating shutdown, etc., to ensure the 

equipment operates stably for a long time.

Check compatibility: Consider whether the humidifier can seamlessly connect with other environmental control systems.

Choose products with hygiene certifications: especially for industries with high cleanliness requirements, select products that have been 

inspected by the health and epidemic prevention station. 

06 Application Examples of Electronic Workshop

A certain electronic factory workshop once faced serious static electricity problems, resulting in a high rate of defective products. A dry environment 

is prone to generating static electricity, and static electricity may damage sensitive electronic components or attract dust, affecting product quality.

After introducing a wet film humidification system to the workshop, the air humidity was maintained within the ideal range of 40%-60% RH, 

effectively reducing static electricity-induced dust accumulation and lowering the risk of component breakdown.

The wet film humidifier also has an air purification function, which can effectively remove some pollutants such as dust and smoke, further 

optimizing the workshop air quality.

After implementing the wet film humidification system, the humidity fluctuation in this electronic factory workshop decreased from ±15% RH 

to ±3% RH, and the defective product rate dropped by 28%.

The work efficiency of the workers also improved, as the suitable humidity enhanced the working comfort of the staff.

After introducing the wet film humidification system to a certain electronic factory workshop, the humidity fluctuation decreased from ±15% RH 

to ±3% RH, and the defective product rate dropped by 28%.

Workers no longer frequently interrupted production due to static electricity issues, and the maintenance team no longer had to worry about water 

scale blocking pipes. The wet film humidifier became an indispensable invisible guardian of this workshop, silently ensuring the stability of the 

production environment.