What is a Laminar Air High Efficiency Filter? 

Laminar air HEPA filter is a high efficiency air filter, which can trap particulate dust above 0.5 um with a filtration efficiency of 99.99%. It is usually made of superfine glass fiber paper as filter material, offset paper, aluminum film and other materials as partition board, glued with wood frame aluminum alloy, made of special silicone rubber, odorless, the surface will not harden, there will be no cracks for a long time, stable chemical properties, corrosion resistance, can absorb the stress caused by thermal expansion and cold contraction without cracking, moderate hardness, good elastic recovery. 

How to create clean air with laminar flow

To create laminar clean air, the key is to achieve air purification and airflow control. Specifically, it is necessary to purify the air through a high-efficiency filter, and use a laminar flow ultra-clean device to control the direction of airflow, forming a fine, thin layer of airflow, which is transported in the same direction at a uniform flow rate. 

In addition, the laminar flow system is widely used in the operating room, for example, the purification of the air inside the operating room is achieved by the circulation of the air. This process includes the control of temperature, humidity, harmful gases and dust by the air conditioning purification system, as well as the maintenance of indoor positive pressure. 

For the operating room, it is also necessary to strictly purify the air. For example, the four corners of the operating room wall, the purification unit, the ceiling, the corridor, the fresh air fan and the exhaust fan are equipped with different levels of filters, which are regularly cleaned, repaired and replaced to strictly ensure the sterility of the indoor air. At the same time, in order to deal with possible external pollution sources, such as fresh air sent to the operating room, strict protective measures are also needed. 

What are the advantages of laminar clean air? 

Laminar clean air has the following advantages: 

1. Sterile environment: Laminar air can effectively remove dust, bacteria, viruses and other microorganisms in the air, creating a sterile environment. This is very important for operating rooms, laboratories and other environments that require a high degree of cleanliness. 

2. Reduce the risk of infection: Because laminar air can effectively remove microorganisms in the air, it can reduce the risk of exposing people to these microorganisms, thus reducing the possibility of infection. 

3. Improve air quality: Laminar air can not only remove microorganisms, but also remove odors and harmful gases in the air to improve air quality. This is very beneficial to protect people's health. 

4. Energy saving: Compared with ordinary air conditioning systems, laminar flow systems can save energy by recycling indoor air. This is because the laminar flow system only needs to filter and purify the air, and does not need to constantly introduce new air like traditional air conditioning systems. 

5. Improve comfort: Because laminar air can maintain a constant temperature and humidity, it can improve people's comfort. In addition, the laminar flow system can also reduce noise and vibration, further improving comfort. 

What is the typical laminar clean air flow rate created with a HEPA filter 

Laminar clean air flow rate is determined by the performance of the HEPA filter and the environment in which the filter is set, so it does not have a fixed velocity. However, in practical applications, such as in the operating room, after the air is purified by the high efficiency filter, it is necessary to control the flow direction of the airflow, that is, to use the laminar flow ultra-clean device to make the airflow flow from the area with high cleanliness to the area with low cleanliness, and to take away and discharge the dust particles and bacteria in the airflow. In the pharmaceutical, lithium battery, semiconductor, cosmetics, food and other industries that need clean environment to ensure production quality, the laminar flow hood can be widely used to create A-level areas in these B-level or C-level clean environments. 

Clean room, operating table, laminar air velocity. 

Laminar air velocities in clean operating rooms are typically set at 0.36-0.54 m/s. Laminar flow is a fine and thin layer of airflow, which is delivered in the same direction at a uniform flow rate. It requires not only highly clean air (the air entering the operating room must first be purified by a high-efficiency filter), but also the ability to control the direction of airflow (that is, the use of laminar flow ultra-clean devices), so that the airflow flows from the operation area with high cleanliness to the area with low cleanliness. And entrains and expels dust particles (motes) and bacteria from the air stream. 

In addition, the centralized air supply device of the clean operating room shall meet certain requirements. For example, the air supply area of the air supply device shall not be less than the values listed in Table 8.2.1. When the centralized air supply surface of the clean operating room needs to be separated, the air flow shall be overlapped at a height of about 2m above the ground. These measures are taken to ensure the cleanliness of the surgical area and to prevent infections that may be caused by microorganisms and other particles.