ISO Cleanroom Classification—What is a cleanroom and what is cleanroom turnkey project?
Cleanroom Conception
1.What is cleanroom refer to?
Cleanroom refers to a specially designed room that will remove the particulates, toxic and harmful air, bacteria, and other pollutants in the air within a certain space, and control the indoor temperature, cleanliness, indoor pressure, airflow speed, and airflow distribution, noise and vibration, lighting, and static electricity within a certain range of needs. Cleanrooms are generally used in the electronics industry, the food industry, the pharmaceutical industry, and the hospital industry.
2.Working principle of cleanroom
Airflow → primary filter section → surface cooling section → heating → fan section → medium-efficiency filter section → pipeline → high-efficiency filter air outlet → blowing into the room → dilution of particles such as dust and bacteria → return air shutters → AHU, repeat the above process, you can achieve Purification purpose
Repeat the above process to achieve the purpose of purification.
Cleanroom Classification
1.Classification by usage
(1)Industrial cleanroom
Targeting the control of inanimate particles. Mainly controlling the contamination of air dust particles to work objects, the internal of the clean room generally maintains a positive pressure state. It is suitable for the precision machinery industry, electronic industry (semiconductor, integrated circuit, etc.), aerospace industry, high-purity chemical industry, atomic energy industry, optical magnetic products industry (optical disc, film, tape production), LCD (liquid crystal glass), computer hard disk, computer magnetic head production, and many other industries.
(2)Biological Cleanroom
The biological cleanroom mainly controls the contamination of the living particles (bacteria) and inanimate particles (dust)contamination to the working objects. It can be further divided into:
General biological cleanroom: mainly control the contamination of microbial (bacteria) objects. At the same time, its internal material should be able to withstand various sterilizing agents and is maintained under positive pressure. In essence, it should be an industrial cleanroom with internal materials that should be able to withstand various sterilization processes.
Biological safety cleanroom: mainly controls the contamination of the living particles from the work object to the outside world and humans. The interior should be kept at a negative pressure to the atmosphere.
2.Classification by air flow
(1)One-way flow cleanroom
A one-way flow cleanroom is also called a laminar flow cleanroom. It is also divided into vertical flow cleanroom and horizontal flow cleanroom. The airflow is parallel, straight and smooth from the indoor air supply side to the corresponding return air side. The pollutants from the indoor pollution source are pressed out of the room by the clean air before they diffuse into the room, and the clean air sent in plays an isolation role for the pollution source.
Features: The streamlines are unidirectionally parallel, which means that the time-averaged streamlines are parallel to each other, the direction is single, and the clean airflow is not one or several, but fills the entire room section, so this cleanroom does not rely on clean airflow to indoor dirty air. Instead, it relies on the push-out effect of clean airflow to discharge the indoor dirty air to the outside along the entire section to achieve the purpose of purifying the indoor air.
（2）Turbulence cleanroom
A turbulence cleanroom is also called a non-unidirectional flow cleanroom. The principle of a non-unidirectional flow cleanroom is to diffuse, mix and continuously dilute indoor air by clean air supply air, and gradually discharge indoor pollution to achieve balance. In short, the principle behind a non-unidirectional flow cleanroom is dilution.
Features: The turbulent cleanroom relies on multiple ventilations to achieve cleanliness and cleanliness. The number of air changes determines the purification level in the definition (the more air changes, the higher the purification level)
（3）Radial flow clean room
The radial flow cleanroom is also the vector flow clean room. The air supply and return vents need to be installed on opposite sides and arranged diagonally. The diffuser plate of the air supply port is generally made into a 1 /4 arc shape. Through this air supply port, the radial clean air flow is sent to the obliquely downward air return port, and the pollutants are “slanted” toward the air return port area, and finally discharged into the room.
Features: Under the same cleanliness requirements, the required air supply volume is very small, the energy saving effect is very significant, and the radial flow clean room can reach the cleanliness of class 1000 and below. But the purification effect is better than non-unidirectional flow clean room.
（4）Mixed flow cleanroom
The general form of the mixed flow cleanroom is that the entire clean room is a non-unidirectional flow clean room, but a unidirectional flow type cleaning measure is adopted above the area that requires strict air cleanliness, so that the area can obtain a unidirectional flow that meets the requirements. Type clean area to prevent the surrounding relatively poor air environment from affecting the local high cleanliness.
Features: The vertical one-way flow area is compressed to the minimum, and the large-area one-way flow is replaced by a large-area non-one-way flow to reduce the initial investment and operating costs.
Cleanroom Construction
1. Decorative structure class
(1)The purification equipment required for the cleanroom mainly includes:
The purification equipment required for the clean room mainly includes an air shower room, cargo shower room, laminar flow transfer window, high-efficiency air supply port, pressure relief valve, air volume control valve, etc. After the clean room is completed, some local purification level requirements are particularly high. Therefore, we recommend customers use clean benches, clean sheds, and other purification equipment.
(2)Decorative material
Clean room sandwich panel for enclosure structure, cleanroom door, cleanroom window, various aluminum profiles (slot aluminum, ceiling keel, angle aluminum, shape column aluminum, outer disc, three-dimensional joint, door plug, inner arc, etc.); Auxiliary materials: Angle iron, round steel, rubber stopper, white nail, pull hook, etc.
2. Air conditioning units:
(1)The main materials of the air-conditioning ventilation part are the air-conditioning host, return air pipe, galvanized water pipe (or PVC water pipe) water tower, gate valve water pump, Y-type filter, rubber hose, check valve, water flow switch, thermometer, pressure gauge, water filter, various pipe codes;
(2)The main materials of the ventilation part are: medium-efficiency booster box, air valve, air volume control valve, initial-efficiency rainproof louvers, wind-return louvers, primary-efficiency filter, medium-efficiency filter, high-efficiency filter, laminar flow hood ( FFU), thermal insulation cotton, moisturizing hose, various auxiliary materials;
3. Electrical part:
1. Air conditioning circuit;
2. Purification equipment circuit;
3. Lighting circuit;
4. Ground part:
1. Epoxy resin floor;
2. PVC floor;
3. Raised floor ground;
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