August 14, 2023
In general, laminar flow refers to the layering of indoor air. Efficient air filters, such as those used in cleanrooms, allow dust particles to move within this laminar flow. This means that dust particles are carried by the air. In cleanrooms and controlled environments within air conditioning systems, efficient air filters create a non-laminar flow, meaning that suspended particles in the air can quickly mix, stationary particles indoors can become airborne again, and some air might become stagnant.
How Effective is the Use of HEPA Filters?
HEPA filters primarily control bacteria and viruses. Microorganisms primarily attach to dust particles. By effectively controlling airborne dust particles, HEPA filters also control bacteria and viruses in the air. To achieve this, particle-blocking HEPA filters must be used for filtration. Generally, standard HEPA filters can achieve a filtering efficiency of up to 99.996% for bacteria, which essentially meets the requirements for filtration and purification in a biological cleanroom.
The main filtration principle of HEPA filters is based on the principle of inertia. Larger particles are filtered out but can accumulate and block the HEPA filter, reducing its lifespan. To counteract this, special construction and filter materials are used to give the filter a self-cleaning function. Large particles cannot adhere to the HEPA filter, ensuring that filtering efficiency is not compromised and extending the filter's lifespan.
What are the Product Characteristics of HEPA Filters?
1. HEPA filters can be categorized into on their structure: Mini-pleat HEPA Filter and Separator HEPA Filter
2. The outer frame of HEPA filters can be made from galvanized steel, aluminum alloy, or stainless steel, offering users various material choices.
3. HEPA filters can be classified into ordinary, high-temperature resistant, and humidity-resistant types based on their characteristics.
4. HEPA filters are known for their high filtration efficiency, low resistance, and high dust holding capacity.
HEPA filters use ultra-fine glass fiber paper as the filtration material and pleated paper as partitions. These components are assembled within the frame. They are applied in various purification and supply air systems, clean laminar flow hoods, clean workbenches, and air purifiers to achieve air cleanliness standards.
