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Clean Laboratory Design Points

Jun 28, 2018

In our daily life, clean rooms are not heard very often. Everyone imagines that the clean room may be a relatively clean house. However, the clean room is very different from the house where our traditional home lives. The clean room is a A workshop on the industrial and manufacturing industries uses the principle of air flow to keep the interior clean at all times. When the clean room is designed, it needs to pay attention to a lot of problems. The following BOKA will introduce the relevant knowledge of clean room design.

Cleanroom design points:


1. Clean room clean room system:

Indoor air purification systems can be divided into horizontal laminar flow, vertical laminar flow, and turbulent flow. One reference convention is chosen for air flow and the other depends on the operating parameters of the room.


2. Cleanliness and air changes:

The cleanliness of the room depends on the number of air changes per unit time, so carefully consider the nature of the work of the room, and the production process requirements, and then determine the technical parameters of the purification system.


3. Structure:

In order to ensure that the air flow is virtually undisturbed, structural design must be carried out and necessary precautions can prevent the accumulation of dust anywhere in the room.


4. Design plan:

To determine the design plan, we must first carefully consider the nature of the work of the room and the air flow conditions in it. It is not advisable to use ground air supply in workshops with large dust emission, and workshops with high cleanliness requirements should be kept away from other workshops as much as possible.


5. Material:

As a clean room ceiling, the materials of the wall and floor must be materials that are not suitable for cracking, particles that do not adhere, and dust that can hardly be found. In addition, depending on the different working conditions of the room, the chemical properties of the material must be considered.


6. Pressure and air flow:

In order to ensure the cleanliness of the room, it is necessary to prevent contaminated air from entering the room. To achieve this goal, positive pressure must be maintained in the room. In order to obtain the required room pressure, appropriate fresh air must be replenished.


7. Auxiliary equipment:

If necessary, we must also install some auxiliary equipment: air indicators such as fresh air outlets, transmission windows on partitions, etc. These devices must fit the requirements of the room and must really understand its function.


8. Control of people and things:

People and things are the main source of dust in the clean room, so they must be fully controlled. For example, before entering the clean room, all people must pass through the human net system, change clean clothes, and receive basic education on the function of the cleansing system.


9. Water supply and drainage device and power supply:

According to the workshop to be operated, necessary water supply and drainage devices, air supply devices and power supplies must be provided. These devices and the equipment involved must be easy to use and design, and there must be no air purification system.


Clean room decoration and design requirements

I. Plane layout of VOLAB clean room


The clean room generally includes the clean area, the quasi-clean area and the auxiliary area.

The layout of the clean room can be in the following ways:

Verandah-style wraparound: The verandah can have windows and no windows, double as a visit and place some equipment, and some have on-site heating on duty. The outer window must be a double sealed window.

The corridor style: the clean room is located at the periphery and the corridor is located at the interior. The cleanliness level of this corridor is generally high, even at the same level as the clean room.

Two-point type: The clean area is set on one side, and the clean and auxiliary room is set on the other side.

Core type: In order to save land and shorten pipelines, the clean area can be the core, up, down, left and right surrounded by various auxiliary houses and concealed pipelines. This way avoids the influence of outdoor climate on the clean area and reduces the heat and cold energy. Consumption, conducive to energy saving.


Second, VOLAB personal purification route


In order to minimize the pollution caused by human activities during operation, personnel must change their clean clothes, shower, shower, and disinfect before entering the clean area. These measures are "personal purification" or "people net."

The clean room in the clean room should be ventilated, and positive pressure should be maintained in other rooms such as the entrance side, and a slight positive pressure should be maintained on the toilet and shower, while negative pressure should be maintained on the toilet and shower.


Third, the material purification route


All kinds of objects must be purified before being sent to the clean area, referred to as "net of things". The material purification route and the human net route should be separated. If the materials and personnel can only enter the clean room at the same place, they must also enter the door and the materials are first subjected to coarse purification. For the occasion where the production line is not strong, an intermediate library may be set in the middle of the material route. If the production line is very strong, straight-through material routes are used, and sometimes purification and delivery facilities need to be set up in the middle of the straight route. In the design of the system, the coarse purification and fine purification phases of the net clean room will blow off a lot of raw particles, so the negative pressure or zero pressure should be maintained in the relatively clean area, and if the risk of contamination is large, the negative pressure should be maintained in the inlet direction. .


The above is a description of VOLAB's introduction to clean room design and other knowledge. We all know that in production we need a dry, clean and clean place. The clean room is such a place, because the production is not the same , so the design requirements for the clean room are not the same. Cleanrooms not only provide cleanliness, but also need to be kept clean. Many particles can be excluded from the outdoors. The introduction of Xiaobian is over here and hopefully it will help everyone.