First, the definition of clean room

1. What is a clean room

Clean room refers to a specially designed room that eliminates particles, harmful air, bacteria and other pollutants in the air within a certain space range, and controls the indoor temperature, cleanliness, indoor pressure, airflow speed and airflow distribution, noise and vibration, lighting and static electricity within a certain demand range

2. Clean working principle

Air flow → initial effect purification → humidification section → heating section → surface cooling section → medium effect purification → fan air supply → pipe → high efficiency purification tuyere → blowing into the room → taking away particles such as dust bacteria → return air shutter → initial effect purification repeat the above process to achieve purification purpose.

Clean room structure drawing

Ii. Classification by use

1, industrial clean room

For the control of inanimate particles. It mainly controls the pollution of air dust particles to work objects, and generally maintains positive pressure inside. It is suitable for precision machinery industry, electronic industry (semiconductor, integrated circuit, etc.) aerospace industry, high purity chemical industry, atomic energy industry, optical magnetic products industry (CD, film, tape production) LCD (liquid crystal glass), computer hard disk, computer magnetic head production and other industries.

Industrial clean room

2. Biological clean room

In order to control the living particles (bacteria) and inanimate particles (dust) of the work object pollution. It can also be divided into:

A. General biological clean room, mainly to control the contamination of microbial (bacterial) objects. At the same time, the internal material should be able to withstand the erosion of various sterilizers, and the internal pressure is generally maintained. In essence, its internal materials should be able to withstand a variety of sterilization treatment of industrial clean room.

B. Biological safety clean room: mainly control the pollution of living particles to the outside world and people. The interior should maintain negative pressure with the atmosphere.

Biological clean room

Three, classification by air flow

1. One-way flow clean room

Uniflow cleanroom is also called flow clean room clean room is divided into vertical and horizontal flow clean room, the air flow is from indoor air supply side parallel, straight, smooth flow, to the corresponding return air side, it is the indoor pollution sources in before to the spread of indoor pollutants is out of the room, clean air pressure into the isolation effect to the pollution source of clean air.

Features: unidirectional parallel to the streamline, refers to the time average flow parallel to one another, single direction, and clean air is not one or a few shares, but fills the entire room section, so the clean room not by clean air on indoor dirty air mixing dilution effect, but by the launch of clean air will indoor dirty air along the entire section to the outdoor, achieve the purpose of purifying indoor air.

1. Turbulence clean room

Turbulence clean room is also called non-one-way flow clean room. The principle of non-one-way flow clean room is to rely on clean air supply air diffusion, mixing, and continuous dilution of indoor air, and gradually discharge indoor pollution to achieve balance. In short, the principle of non-unidirectional flow clean room is dilution. Features: Turbulence clean room is by multiple ventilation to achieve cleanliness and cleanliness level. The number of air changes determines the purification level in the definition (the more air changes, the higher the purification level)

2. Radial flow clean room

The radial flow clean room is also the vector flow clean room. The air supply port and the return air port should be installed on the opposite side and arranged diagonally. The air supply outlet diffusion orifice plate is generally made of 1/4 circular arc. Through this air supply outlet, the radial clean air flow is sent diagonally to the lower return air outlet, and the pollutants are "diagonally pushed" to the return air outlet area, and finally discharged indoors.

Features: Under the same cleanliness requirements, the required air supply is very small, the energy saving effect is very significant, and the radial flow clean room can reach the cleanliness of 1000 and below. But the purification effect is better than non - one-way flow clean room.

3. Mixed flow clean room

The general form of mixed flow clean room is that the whole clean room is a non-one-way flow clean room, but unilateral flow type cleaning measures should be adopted above the area with strict air cleanliness to make the area meet the requirements of one-way flow type clean area, so as to prevent the relatively poor surrounding air environment from affecting the local high cleanliness.

Features: the vertical unidirectional flow area is compressed to the minimum, and large area non-unidirectional flow is used to replace large area unidirectional flow to reduce initial investment and operating costs.