The construction of clean rooms is a very complex project. The construction of clean rooms not only requires a very professional team, but also requires professional knowledge to understand clean rooms; To understand the clean room, you can start from the professional terms of the clean room, so that you can have a more thorough and comprehensive understanding of the clean room. The following scene to explain to you clean room professional terms are what it means.

1. Clean room and related controlled environment

The parameters of the clean room and its affiliated, auxiliary, and associated open or closed interior or surrounding space, such as the concentration of suspended particulates, are also controlled in accordance with relevant standards.

2, one-way flow clean room

The clean room with single direction, parallel streamline and uniform speed flows through the whole section of the room working area.

3. Non-one-way flow clean room

It refers to the clean room where the streamline is not parallel, the direction is not single, the speed is not uniform and the chaotic airflow with cross gyrate flows through the whole section of the room working area. Also known as turbulence clean room.

4. Mixed flow clean room

At the same time, there are two kinds of clean rooms with unidirectional flow and non-unidirectional flow respectively.

5, clean the work shed

Clean shed is a kind of air purification equipment which can provide local high clean environment. It is mainly composed of box body, fan, primary effect air filter, damping layer, lamps and lanterns, etc. The shell is sprayed with plastic. The product can be suspended, and ground support, compact structure, easy to use. It can be used singly or connected to form a belt clean area.

6. Aerosol

A substance suspended in air, solid or liquid, active or inactive, with a particle size ranging from 10nm to 100μm.

7. Bioaerosol

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

8. Plankton

Bacteria-carrying particles suspended in the air.

9. Sedimentation bacteria

A germ - carrying particle that lands on a surface.

Use aerosols

A solid or liquid particle suspended in a gaseous state whose particle size distribution and concentration are known and controlled.

11, leakage

Air filter system leakage of contaminants due to poor integrity or defects exceeding the expected downwind concentration.

12, leak detection

The method of finding leaks in filters and unit components is to use an aerosol photometer or optical particle counter to scan the pass area with overlapping scan areas.

13. Ultra-clean workbench

Ultra-clean table is designed to meet the needs of modern industry, photoelectric industry, biopharmaceutical, scientific research and other fields for the cleanliness of local work area. The air is sucked into the pre-filter through the fan, and filtered into the hePA filter through the hydrostatic chamber. The filtered air is sent out in the state of vertical or horizontal airflow, so that the operating area can reach the cleanliness of 100 grade and ensure the production of environmental cleanliness requirements.

14, static

All completed and complete facilities, purification and air conditioning system operating normally, no personnel on site. At this time the production equipment has been installed but not running clean room state; Or the production equipment stops running and self-cleaning to reach the clean room state after the specified time; Or the state of the clean room that is being operated in a manner agreed upon by the Builder (user) and the builder. It is one of the three occupied states (empty state, static state and dynamic state) of the clean room.

15. High purity gas

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

16, purified water

Water with a resistivity greater than 0.110^6 ω cm at 25℃.

17. High purity water

Refers to the temperature of 25℃, the resistivity is greater than 0.110^6 ω cm, the water is greater than or equal to 0.5μm dust particles less than 300 particles/mL, living microorganisms less than 9 / mL of pure water.

18. Large (macro) particles

Particles with an equivalent diameter greater than 5μm.

Ultrafine particles

Particles with an equivalent diameter less than 0.1μm.

20. Permanent gas

Gases whose critical temperature is below -10℃, such as air, oxygen, nitrogen, helium, methane, carbon oxide, etc.

21. Special gases

Gases for a specific purpose, including single gases or mixtures of gases. There are 259 kinds of single gases, including 115 kinds of electron gases, 63 kinds of organic gases, 35 kinds of inorganic gases, 29 kinds of halocarbon gases and 17 kinds of isotope gases.

22. Medical gases

Gas used for treatment, diagnosis, prevention and other medical purposes in accordance with relevant medical regulations.

23. Clean gas

A common gas whose number of particles per unit volume is less than or equal to the cleanliness of the clean environment in which the gas is used.

24. Molecular pollutants

Pollutants contained in the air at molecular level, such as acidic gases, alkaline gases, condensed organic matter, dopants used in semiconductors, highly volatile organic matter and metal at molecular level.

25. Cleanliness

Cleanliness refers to the amount of dust in the air environment.

26. Clean area

The concentration of air suspended particles is controlled by the limited space. Its construction and use should reduce the introduction and generation and retention of particles in the space. Other relevant parameters in the space, such as temperature, humidity and pressure, are controlled according to the requirements.

Air shower room

Air shower is a kind of local purification equipment with strong generality, which is installed between clean room and non-clean room. When people and goods want to enter the clean area, they need to be blown by the air shower, and the clean air blown out can remove the dust carried by people and goods, and can effectively block or reduce the dust source into the clean area.

28, filter leakage after installation

To verify that the filter is properly installed. Verify that the facility is free of bypass leakage, and that the sealing surface between the filter and the mounting frame is free of defects and leaks.

Air lock chamber

The buffer room is set at the entrance and exit of the clean room to block outdoor or adjacent room polluted air flow and differential pressure control.

30. Transfer window

The opening for transferring materials and tools arranged on the partition wall of the clean room is provided with window sashes that cannot be opened at the same time on both sides.

31. Self-cleaning time

After the clean room is contaminated, the time between the start of the clean air conditioning system and the return to a stable specified level of indoor cleanliness.

Air shower channel

Air shower channel is the supporting equipment of clean workshop and supporting clean room. It is used to blow away the dust attached to the surface of the human body and the objects that enter the clean area. At the same time, it acts as an air brake to prevent the unpurified air from entering the clean area.