Frame Material

The frame of the clean room is usually made of industrial aluminum profile, stainless steel square pass or baking paint iron square pass. Among them, aluminum profile has become the preferred material for the frame of clean room due to its light weight, high strength, not easy to rust, and no dust production. For example, 4040 and 4080 profiles are commonly used in the construction of general clean rooms due to their good load-bearing capacity and modular design. For larger sizes or double-storey structures, larger profiles such as 8080, 6060, 9090 or 100100 need to be considered.

Wall and top materials

A wide range of materials can be chosen for the walls and top of the cleanroom, including but not limited to stainless steel, baked cold rolled steel, anti-static grid curtains and pressed acrylic glass. All of these materials have excellent anti-dust, anti-static, and easy-to-clean properties, and can effectively maintain cleanliness inside the cleanroom. In addition, FFU (Fan Filter Unit) is an important part of the clean room, which is responsible for providing filtered air to ensure the air quality inside the clean room.

Other Components

In addition to the above materials, the clean room also includes some special components, such as anti-static flooring, dust-free doors, antibacterial coatings, etc., which also have a significant impact on the overall performance of the clean room. For example, anti-static flooring can effectively avoid static build-up, while dust-free doors can effectively separate clean and non-clean areas.

Features

The clean booth is characterized by modular design, easy installation and movement. It has a simple structure, the number of FFUs can be adjusted according to different cleanliness requirements, and the internal cleanliness level can reach 10 to 100,000. In addition, the Clean Shed is cost-effective and can be put into operation faster than traditional clean room construction with lower requirements for floor height.

Applications

Clean rooms are widely used in areas requiring high local cleanliness, such as precision machinery, electronics manufacturing, biomedical, food processing and other industries. In the field of health care, clean booths can be used to isolate patients or perform sterile surgical operations. In scientific research laboratories, it can provide a dust-free environment to protect sensitive experimental samples.

Airflow organization

Airflow organization inside a cleanroom is one of its core functions. In class 10-100 clean rooms, a unidirectional vertical airflow is required to achieve class 100 or higher cleanliness. This means that the airflow inside the cleanroom needs to be uniform in direction and velocity at any point in the same cross-section, in order to maximize the rapid removal of dust particles from the room.

In order to achieve this goal, high-efficiency filters are usually placed all over the roof to ensure the purity of the air. In the 1K-100K clean room, the direction of airflow organization is different from the previous category, the air flow at an uneven speed, there may be reflux and vortex phenomenon. This type of clean room mainly relies on the continuous dilution of the internal air flow to gradually eliminate pollution in order to achieve clean results.

Air Filtration System

The air filtration system of a clean room is the key to its clean function. The system consists of primary and high efficiency filters that capture and remove airborne particles. HEPA filters, in particular, intercept the majority of particles and ensure that the air fed into the clean room is as clean as it needs to be.

Air Velocity and Distribution

In order to ensure cleanliness in a cleanroom, airflow velocity and distribution must be precisely controlled. In a vertical flow clean room, air is sent out at a uniform velocity of about 0.45m/s±20% to form a homogeneous layer, which makes the clean air flow rise vertically and unidirectionally, thus effectively removing dust particles.

Design and construction standards of clean room

The design and construction of clean shed must follow a series of national standards, including “Clean Room Design Standards” GB50073-2001, “Hospital Outpatient Clean Operating Room Project Building Technical Standards” GB 50333-2002, “Microbiological Safety Laboratory Project Building Technical Standards” GB 50346-2004 and so on. These standards stipulate the specific requirements of air cleanliness level, noise control, micro-vibration control and many other aspects of the clean shed. For example, GB 50073-2001 stipulates details such as the distance between the fresh air outlet of the clean plant and the traffic artery, and the floor area of the room for personnel purification and the living room.

Testing and Evaluation of Clean Sheds

The performance evaluation of a clean shed usually involves the measurement of its parameters such as floating dust particle count, foundation settling bacteria, falling bacteria, air exchange rate, wind power, air exhaust, light intensity, noise, temperature, air humidity and so on. These parameters have a direct impact on the quality and effectiveness of the clean room and are the basis for judging whether it meets the relevant standards.