During the operation of the laminar flow hood, it is very important to ensure that the airflow is uniform and stable. The following is an introduction from the aspects of design, installation, commissioning, maintenance, etc.
Reasonable structural design is the basis. The laminar flow hood usually adopts the design of top air supply and bottom air return, and a flow equalizer is set inside. The flow equalizer can evenly distribute the air entering the hood, avoid the airflow from concentrating in a certain area, and provide a preliminary guarantee for achieving uniform and stable airflow.
High-quality air filtration system is the key. Efficient filters are the core components of laminar flow hoods. For example, high-efficiency air filters (HEPA) can not only effectively filter tiny particles in the air, but also make the airflow more uniform when passing through the filter. At the same time, the reasonable configuration of primary and medium-efficiency filters to pre-filter the air can reduce the burden of high-efficiency filters and ensure the stable passage of airflow.
Appropriate fan selection and control are very important. Select a suitable fan according to the size of the laminar flow hood, the required air volume and other parameters to ensure that the fan can provide stable wind pressure and air volume. The frequency conversion speed regulation technology can adjust the fan speed in real time according to actual needs, maintain the stability of the airflow, and avoid uneven airflow caused by unstable fan operation.
Accurate installation is a necessary condition. The installation level and verticality of the laminar flow hood must be strictly controlled to ensure that it is tightly connected to the surrounding environment and has no gaps. If the installation is not standardized, such as tilt or gaps, it will cause airflow leakage or form local vortices, affecting the uniformity of the airflow.
Careful debugging cannot be ignored. After the installation is completed, the laminar flow hood needs to be fully debugged. By adjusting the operating parameters of the fan, the position of the flow plate, etc., the airflow speed of each part is detected and adjusted using professional equipment such as anemometers to make the airflow reach a uniform and stable state.
Regular maintenance and inspection are guarantees. Regularly check the blockage of the filter, and replace the filter with severe blockage in time to prevent the airflow distribution from being affected by the increase of filter resistance. At the same time, check the operating conditions of the fan, flow plate and other components to ensure their normal operation and uniform and stable airflow.
To ensure that the airflow of the laminar flow hood is uniform and stable, it is necessary to strictly control multiple links from design, equipment selection, installation, commissioning to maintenance. Problems in any link may lead to uneven local airflow. Only when all links work together can the laminar flow hood perform at its best and provide reliable protection for places that require a clean environment.
