1. The filtering effect of high-efficiency HEPA filters
HEPA (high-efficiency particulate air) filters are the core component of modern medical air purifiers. They can capture extremely small particles in the air, including bacteria, viruses and other pollutants. The high efficiency of HEPA filters is due to their strict filtering standards. They can filter out particles with a diameter of up to 0.3 microns with a filtration efficiency of up to 99.97%. According to many scientific studies, the diameter of viruses is generally between 0.02 and 0.3 microns, which makes HEPA filters an important tool for effectively removing viruses and bacteria.

The HEPA filters in medical air purifiers can not only filter dust, smoke and allergens in the air, but also effectively capture bacteria and viruses suspended in the air. These microorganisms can be transmitted through the air. Once they enter public medical environments such as hospitals and clinics, they may cause nosocomial infections or cross-infections. Therefore, medical air purifiers equipped with HEPA filters play an important role in epidemic prevention in these places.

2. Application of UV sterilization technology
In addition to HEPA filters, modern medical air purifiers are also equipped with ultraviolet (UV) sterilization lamp technology, which can further enhance the ability of air purifiers to remove viruses and bacteria from the air. Ultraviolet rays have a sterilizing effect. They can destroy the DNA or RNA of pathogenic microorganisms, thereby making them lose their ability to reproduce and achieve the effect of inactivation.

UV sterilization technology has been widely used in places such as hospitals and laboratories, especially in high-risk areas such as operating rooms and ICUs (intensive care units), and can effectively kill pathogens in the air. Unlike the physical filtration of HEPA filters, ultraviolet rays can eliminate microorganisms in the air through radiation, ensuring that the purified air no longer carries pathogenic bacteria and viruses.

3. The auxiliary role of negative ion technology
Negative ion technology is also an important function of many medical air purifiers. Negative ions can combine with tiny particles in the air and make them settle to the ground, thereby reducing suspended matter in the air. For pathogenic microorganisms such as bacteria and viruses, negative ions can help them settle and reduce their spread in the air.

Studies have shown that negative ions can not only remove dust, pollen and other particles in the air, but also slow down the spread of bacteria and viruses in the air to a certain extent. In medical environments, negative ion technology can be combined with HEPA filters and ultraviolet technology to create a cleaner and safer air environment for hospitals.

4. Intelligent control and air quality monitoring
Modern medical air purifiers not only have traditional air purification functions, but are also equipped with intelligent control systems and air quality monitoring functions. These devices monitor air quality in real time through built-in sensors and automatically adjust the purification mode and wind speed according to the degree of pollution. When the concentration of bacteria, viruses or other harmful substances in the air reaches a certain level, the air purifier will automatically start the high-efficiency purification mode to ensure that the microorganisms in the air are effectively removed.

5. Multi-level air purification technology
In medical environments, the purification ability of air purifiers is not only reflected in a single filtering technology, but through the combination of multiple purification technologies to form a comprehensive purification system. In addition to HEPA filters, ultraviolet sterilization and negative ion technology, many medical air purifiers also combine activated carbon filters, photocatalyst technology and other means to remove harmful gases and volatile organic compounds (VOCs) in the air.

Activated carbon filters can absorb harmful gases in the air, such as formaldehyde, benzene and other toxic substances; photocatalyst technology decomposes harmful substances in the air through light reactions, further improving the comprehensiveness and efficiency of air purification. This multi-level purification technology can purify the air while removing viruses, bacteria and other harmful substances in the air to the greatest extent.