Is an air shower required in a clean room

The installation of air showers is a topic of great interest in the construction and operation of cleanrooms (clean sheds). The main function of an air shower as a transition area is to reduce contamination from the external environment to the interior of the cleanroom. In this paper, we will analyze the role of the air shower, working principle, structure and personnel in and out of the operation process, and explore the Wind speed of the air shower can effectively remove dust, and ultimately determine whether the clean shed needs to be equipped with the installation of air shower.

I, the role of the air shower

The main function of the air shower is to remove particles and microorganisms on the surface of personnel and articles entering the clean room through highly efficient air spraying technology. It forms a “barrier” in the entrance area of the clean room to prevent the intrusion of external pollutants, thus maintaining the environmental quality of the clean room. The air shower can significantly reduce the concentration of particles in the clean room, improve the product qualification rate and production efficiency.

II, the working principle of the air shower

The working principle of the air shower room is based on the spray of high-speed airflow. When people or goods enter the air shower, the nozzle will automatically open, generating a high air velocity airflow, the surface attached to the dust and microorganisms blown away. The circulation system of the air shower purifies the air through high-efficiency filters (e.g., HEPA) to ensure that the sprayed airflow is clean. At the same time, after a strict control system, the air shower can adjust the wind speed and spray time according to the actual needs, in order to achieve the best cleaning effect.

III, the structure of the air shower

The structure of the air shower generally includes the following main parts:

1. shell: stainless steel or high-strength aluminum alloy material, with good corrosion resistance and wear resistance.

2. spray system: configuration of multiple high-efficiency nozzles, can evenly distribute airflow, to ensure that all-round cleaning.

3. air filtration system: including primary filter and high efficiency filter (HEPA), effectively removing particles in the air.

4. Control system: controlled by microcomputer, it automatically detects and adjusts wind speed and spraying time to ensure easy and safe operation.

5. Observation window: it is easy to monitor the internal status and ensure the safety during operation.

IV, the air shower personnel in and out of the operation process

The operation process of the air shower is generally as follows:

1. Preparation before entering: Before entering the air shower, personnel should make sure that they are not carrying pollutants, such as dust and dirt.

2. Entering the air shower: open the door of the air shower and enter the room.

3. automatic spraying: after the door is closed, the air shower starts to work, the nozzles automatically spray high wind speed airflow, the duration is generally 20-30 seconds.

4. Finish cleaning: after the end of spraying, the door of the air shower opens automatically, and people can Enter the clean room safely.

5. regular maintenance: regular maintenance of the air shower to ensure the normal operation of the equipment and air filtration effect.

V, the wind speed of the air shower wind outlet can be blown off the people or goods above the dust

Air shower design wind speed is usually between 20-30m / s, this wind speed is sufficient to remove most of the particles attached to the surface of the people or goods. Studies have shown that high velocity airflow is effective in blowing light dust and microorganisms away from surfaces, reducing their environmental impact as they enter the cleanroom. However, too high a wind speed may lead to the displacement of items, so in the design of the air shower need to consider the efficiency and safety.

Vi, clean shed whether supporting the installation of air shower

Whether or not to install an air shower in a clean room depends on the following factors. 1:

1. Cleanliness requirements: for high cleanliness requirements of the environment (such as Semiconductor, Pharmaceutical industry), the installation of air shower is necessary to significantly reduce the risk of contamination.

2. Frequency of entry and exit: If there is a high frequency of entry and exit of people and goods in A Clean Room, an air shower can provide an effective cleaning guarantee and improve the overall performance of the clean room.

3. Cost considerations: Although the installation of an air shower increases the initial investment, this cost is often offset by the long-term benefits and increased product qualification rates it brings.

To summarize, air showers play a vital role in clean sheds, especially in ensuring the quality and stability of the clean environment. Summarizing the above analysis, we can draw conclusions:

The installation of an air shower is extremely recommended and necessary in high cleanliness industries. It not only effectively reduces the impact of external contaminants on the inside of the modular cleanroom, but also ensures that people and objects entering the environment meet certain cleanliness standards through its highly efficient air shower system. Despite the increased initial investment and maintenance costs, the long-term benefits it brings in terms of improved product quality, reduced rework rates, and reduced risk of cross-contamination are enough to make this investment seem extremely reasonable. Therefore, when planning a clean room, it would be a wise decision to consider installing an air shower.