Building a clean room is a very complicated project. Building a clean room requires not only a very professional team, but also professional knowledge to understand the clean room; to understand the clean room, you can start with the clean room. Start with professional terminology, so that you can have a more thorough and comprehensive understanding of the clean room. Let's explain the meaning of the professional terms in the clean room.

1, clean room and related controlled environment

The clean room and its associated, auxiliary, associated open or closed internal or peripheral spaces, and parameters such as suspended particulate concentration in the space are also controlled by the relevant standards.

2. One-way flow clean room

The unidirectional flow with a single direction, parallel flow lines, and uniform and stable speed flows through the clean room of the entire cross section of the working area of the room.

3. Non-unidirectional flow clean room

refers to a clean room where the streamlines are not parallel, the direction is not single, the speed is uneven, and the turbulent airflow with cross-rotation flows through the entire cross section of the working area of the room. Also known as turbulent clean room.

4. Mixed flow clean room

There are two types of clean rooms with unidirectional flow and non-unidirectional flow.

5. Clean work shed

Clean work shed is an air purification equipment that can provide a local highly clean environment. It is mainly composed of cabinet, fan, primary air filter, damping layer, lamps, etc., and the shell is sprayed with plastic. The product can be hung and supported on the ground, with a compact structure and easy to use. It can be used singly or in multiple connections to form a strip-shaped clean area.

6. Aerosol

Suspended in the air, solid or liquid, active or inactive substances, the particle size is in the range of 10nm ~ 100μm.

7. Bioaerosol

A dispersion of tiny solid or liquid particles suspended in air.

8, plankton

Bacterial particles suspended in the air.

9. Settling bacteria

Bacterial particles landed on the surface_.

10. Test aerosol

The particles of solid or liquid suspended in a gaseous state have known and controlled particle size distribution and concentration.

11. Leakage

Contamination of pollutants caused by poor integrity or defects in the air filter system, the transmitted pollutants exceed the predicted value of the downwind concentration.

12. Leak detection

Find a way to leak filters and unit components, that is, use an aerosol photometer or optical particle counter to scan through the test area with overlapping scan areas.

13, ultra-clean workbench

Ultra-clean workbench is designed to meet the cleanliness requirements of local work areas in the fields of modern industry, optoelectronics industry, biopharmaceuticals, scientific research and experiment. It sucks the air into the pre-filter through the fan, and enters the high-efficiency filter through the static pressure box to filter, and sends the filtered air in the state of vertical or horizontal air flow, so that the operation area reaches 100-level cleanliness, ensuring the production of environmental cleanliness Claim.

14, static

All are completed and equipped with complete facilities, the purification air conditioning system is operating normally, and there are no personnel on site. At this time, the production equipment has been installed and the clean room has not been operated; or the production equipment has stopped operating and the self-cleaning has reached the specified time after the clean room; or the clean room is being operated in a manner agreed by the builder (user) and the builder. status. It is one of the three occupancy states (empty, static and dynamic) of the clean room.

15. High purity gas

Gas with a gas composition purity greater than or equal to 99.9995% and a water content of less than 5ppm.

16. Purified water

refers to water with a resistivity greater than 0.1×10^6Ω·cm at a temperature of 25°C.

17, high purity water

means that when the temperature is 25℃, the resistivity is greater than 0.1×10^6Ω·cm, the dust particles greater than or equal to 0.5μm in water are less than 300 particles/ml, and the living microorganisms are less than 9/ml Pure water.

18. Large (macro) particles

Particles with an equivalent diameter greater than 5μm.

19. Ultrafine particles

Particles with an equivalent diameter of less than 0.1 μm.

20, permanent gas

Gas with critical temperature below -10℃, such as air, oxygen, nitrogen, helium, methane, carbon oxide, etc.

21, special gas

In order to meet the specific purpose of the gas, including a single gas or mixed gas. There are 259 types of single gases, including 115 types of electronic gases, 63 types of organic gases, 35 types of inorganic gases, 29 types of halocarbon gases, and 17 types of isotope gases.

22, medical gases

A gas that meets the requirements of medical regulations and is used for medical treatment, diagnosis, and prevention.

23, clean gas

The amount of particles contained in a unit volume is less than or equal to the common gas used in the clean environment of this gas.

24, molecular pollutants

Contaminants with molecular weight levels contained in the air, such as acid gases, alkaline gases, condensable organic substances, dopants for semiconductors, highly volatile organic substances and molecules Grade metal, etc.

25, cleanliness

Cleanliness refers to the degree of dust contained in the air in the air environment.

26. Clean area

Confined space with controlled air suspended particle concentration, its construction and use should reduce the introduction and generation of particles in the space and the retention of particles, other relevant parameters in the space such as temperature, humidity, pressure, etc. according to requirements For control, the clean area can be open or closed.