Air Change Methods in Clean Workshops
2024.12.18
In modern industrial production and scientific research fields, the importance of clean workshops is self-evident. And the air change methods, as one of the key factors for maintaining the clean environment of the workshop, directly affect the air quality, temperature and humidity balance, and the overall production efficiency of the workshop. Today, Guangzhou Cleanroom Construction Co., Ltd. will take you to have an in-depth understanding of the air change methods in clean workshops.
Unidirectional Flow Air Change Method
Unidirectional flow air change is a relatively common and efficient form of air change in clean workshops. Under this air change mode, air flows from one side of the workshop to the other side at a uniform speed and in a parallel air flow direction, just like a stable "air river". The incoming air is strictly purified through high-efficiency particulate air filters (HEPA) or ultra-low penetration air filters (ULPA) to ensure that the air sent into the workshop is at an extremely high level of cleanliness.
This air change method can quickly and effectively dilute and remove pollutants generated in the workshop, such as dust particles and microorganisms. It is suitable for environments with extremely high cleanliness requirements, such as semiconductor chip manufacturing workshops and aseptic production areas in biomedicine. In the unidirectional flow air change system, it can be further subdivided into vertical unidirectional flow and horizontal unidirectional flow according to the air flow direction. For vertical unidirectional flow, the filters are usually installed on the top of the workshop, and the clean air flows vertically from top to bottom, which can quickly take away the pollutants generated below. For horizontal unidirectional flow, the filters are arranged on one side wall of the workshop, and the air flows horizontally through the entire workshop, which has good applicability for some long and narrow clean areas.
Non-unidirectional Flow Air Change Method (Turbulent Flow Air Change)
The non-unidirectional flow air change, also known as turbulent flow air change, has a relatively complex air flow pattern. The air does not flow in a single parallel direction but forms irregular air vortices and mixtures in the workshop. This air change method mainly relies on a large number of air supply and return to achieve air renewal and pollutant dilution.
Although its air purification effect is slightly inferior to that of the unidirectional flow air change, it has the advantages of lower cost and relatively simple system design. Therefore, it is widely used in some places where the cleanliness requirement is not particularly stringent but a certain degree of air purification is needed, such as general electronic assembly workshops and food processing workshops. In the non-unidirectional flow air change system, the layout of the air supply outlets and return outlets is crucial and needs to be carefully calculated and simulated to ensure that relatively uniform air change effects can be achieved in every corner of the workshop, avoiding the appearance of air flow dead corners that may affect air quality and product quality.
Mixed Flow Air Change Method
The mixed flow air change method combines the characteristics of unidirectional flow and non-unidirectional flow air change and is a more flexible and efficient air change strategy. In practical applications, the unidirectional flow air change method is usually adopted in the key areas of the workshop, such as around the core production equipment and the operation stations that are sensitive to cleanliness, to ensure the high cleanliness requirements of these areas. While in other large areas of the workshop, the non-unidirectional flow air change method is adopted to reduce costs and achieve overall air circulation and pollutant dilution.
This air change method can carry out differentiated air change designs according to the functional needs and cleanliness requirements of different areas in the workshop, so as to optimize resource allocation and improve energy utilization efficiency under the premise of ensuring production quality. For example, in the clean workshops of some large pharmaceutical enterprises, the unidirectional flow air change is used in the drug filling area to ensure a sterile environment, while the non-unidirectional flow air change is used in the raw material storage area and the outer packaging area, which not only meets the requirements of the production process but also takes into account the economic benefits.
Regardless of which air change method is adopted, it is necessary to conduct comprehensive consideration and precise design based on various factors such as the specific use of the clean workshop, the cleanliness level, the spatial layout, the personnel density, and the heat generation of equipment. Guangzhou Cleanroom Construction Co., Ltd. has a professional technical team and rich industry experience, and can customize the most suitable air change scheme for clean workshops for customers. From the selection of air change equipment, installation and commissioning to later maintenance, we provide a full range of high-quality services to ensure that your clean workshop always maintains good air quality and a stable production environment.
If you are interested in the air change methods of clean workshops or other issues related to purification equipment, please feel free to contact us. We will answer your questions wholeheartedly!
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