The application scenarios of fresh air booster cabinets in the civilian field mainly focus on improving indoor air quality and enhancing the comfort of living or activities. They are particularly suitable for places with certain requirements for air cleanliness and ventilation efficiency, as follows: Residential buildings Ordinary residences: Modern residences have relatively strong airtightness. Keeping doors and Windows closed for a long time can easily lead to indoor air turbidity (such as the accumulation of formaldehyde, TVOC, kitchen fumes, pet odors, etc.). The fresh air booster cabinet can introduce filtered outdoor fresh air and at the same time create positive pressure indoors through pressurization, preventing unfiltered air from the outside (such as smog, pollen, and dust) from seeping in through the gaps of doors and Windows. It is particularly suitable for areas with frequent smog and poor air quality, or for people who are sensitive to air (such as the elderly, children, and those with allergic constitutions). High-end apartments/villas: These types of buildings often have large Spaces and multiple functional zones (such as basements, cloakrooms, studies, etc.), and some areas have poor natural ventilation conditions. The fresh air booster cabinet can be combined with the air duct system to deliver

The fresh air booster cabinet is widely used in many scenarios with high requirements for air quality and air pressure control due to its ability to introduce filtered fresh air and increase indoor air pressure to prevent external pollution from seeping in. Specifically, it is as follows: The medical and health field The key areas of the hospital: The operating room requires a strictly sterile environment. The fresh air booster cabinet can remove bacteria and particles in the air through multi-stage filtration and maintain positive pressure inside the room to prevent unclean air from outside from entering and reduce the risk of surgical infection. Areas with high requirements for air cleanliness, such as ICU wards and delivery rooms, also rely on it to provide continuous, clean, fresh air. In addition, in hospital pharmacies and testing laboratories (such as microbiology laboratories), the use of fresh air booster cabinets can prevent impurities in the air from affecting the quality of drugs or experimental results. The field of industrial production In the precision manufacturing industry, in microelectronics, semiconductors, hard disk manufacturing, LED optoelectronics, and other industries, even the tiniest dust and particles during the production process can lead to product scrapping. The fresh

Spray disinfection air shower, as a dedicated device integrating air purification and spray disinfection functions, is widely used in places with extremely high requirements for cleanliness and sterility (such as pharmaceutical workshops, food processing plants, biological laboratories, etc.). Its features are mainly reflected in multiple aspects such as disinfection efficiency, degree of automation, and applicability, as follows: 1. Double purification, more thorough disinfection The most distinctive feature of the spray disinfection air shower is that it combines the dual functions of physical dust removal and chemical disinfection, achieving an integrated process of “decontamination + sterilization”. Physical air shower dust removal: By using high-speed clean air flow (wind speed 20-30m/s), it blows off the floating dust, hair, dander, and other particles on the surface of personnel’s clothes and items, reducing the introduction of physical pollutants into the clean area. Chemical spray disinfection: Disinfectants (such as hydrogen peroxide, hypochlorous acid, etc.) are atomized into tiny droplets (5-50μm), evenly covering the surface of the object to be disinfected. By destroying the cell membranes, proteins, or nucleic acids of microorganisms, it kills pathogenic microorganisms such as bacteria, viruses, and fungi, solving the problem that simple air spray cannot sterilize. The combination of the two

The spray disinfection air shower is a device that combines air purification and spray disinfection functions. It is mainly used for surface disinfection of personnel or items in clean areas such as laboratories, food processing plants, and pharmaceutical workshops to prevent pollutants from entering the clean area. Its working principle can be divided into two core links: air filtration and purification, and spray disinfection. The details are as follows: I. Basic Structure and Core Components Spray disinfection air shower rooms are usually composed of the following parts: Closed cavity (inlet and outlet channels); High-efficiency air filters (HEPA or ULPA); Fan and air duct system; Spray disinfection device (including disinfectant storage tank, atomizing nozzle, pipeline, control system); Sensing devices (such as infrared sensors, photoelectric switches); Control panel (for controlling running time, disinfection mode, etc.). Ii. Work Process and Principles 1. Entry and activation of personnel/items When personnel or items enter the air shower through the entrance, the sensing device (such as an infrared sensor) detects the object, automatically closes the entrance door, and initiates the disinfection program (it can also be triggered manually). At this point, the exit door is locked to ensure that the cavity is sealed during the disinfection

Both spray disinfection air shower rooms and ordinary air shower rooms are protective equipment at the entrance of clean environments, but they have significant differences in functions, principles, and applicable scenarios. The core distinction lies in whether they can actively disinfect. The following is a detailed comparison from multiple dimensions: I. Differences in Core Functions and Principles Comparison item: ordinary air shower room, spray disinfection air shower room The core function only removes physical contaminants (dust, hair, dander, etc.) and simultaneously eliminates physical contaminants and kills microorganisms (bacteria, viruses, fungi, etc). The working principle relies on high-speed clean air flow (20-30m/s) to blow off surface dust. The air is purified through primary and high-efficiency filters and then circulates. Based on high-speed air shower dust removal, chemical spray disinfection is added: the disinfectant is atomized into micron-sized droplets to cover the surface and destroy the microbial structure. The treatment targets are only particulate matter pollution, taking into account both particulate matter pollution and microbial pollution. Ii. Differences in Structural Design Ordinary air shower room The structure is relatively simple and mainly consists of a cavity (made of stainless steel), a fan, a high-efficiency filter, a nozzle (for air outlet), and an

The spray disinfection air shower is a device that combines the functions of high-pressure spray disinfection and air shower purification. It disinfects the surfaces of people and objects in all directions by atomizing disinfectant, and at the same time uses clean air flow to remove residual particles. It is widely used in fields with extremely high requirements for hygiene and safety as well as cleanliness. The following are its main application fields and specific scenarios: I. Medical and health care field In hospital intensive care units (ICUs) and operating rooms, medical staff must pass through a spray disinfection air shower room before entering to kill any possible bacteria (such as bacteria, viruses, fungi, etc.) they may carry and prevent cross-infection. Infectious disease isolation area: For respiratory infectious diseases (such as influenza, COVID-19, etc.), efficient disinfection of people entering and leaving can be carried out through atomized disinfectants (such as peracetic acid, hypochlorous acid, etc.) to block the transmission chain. Biological laboratory: A laboratory that handles pathogenic microorganisms and genetic engineering samples, it is necessary to strictly control the contaminants brought in by personnel. Spray disinfection of air shower rooms can reduce the risk of experimental contamination. Pharmaceutical workshop: The production

There is no uniform standard for the replacement cycle of non-woven filters. It mainly depends on factors such as the usage environment, the configuration of the pre-filter, and the operating load, and is usually between three months and three years. The actual replacement needs to be determined in combination with specific working conditions. The following is a detailed explanation from three aspects: core influencing factors, typical scenario cycles, and judgment basis: I. Key Factors Affecting the Replacement Cycle Environmental cleanliness High-cleanliness environments (such as semiconductor cleanrooms and operating rooms): The particulate matter in the air is extremely small (the number of particles ≥0.5μm is ≤1000 per cubic meter), the dust accumulation rate of the filter material is slow, and the replacement cycle can be extended to 1.5 to 3 years. In general industrial environments (such as food workshops and laboratories), the dust content is relatively high (the number of particles ≥0.5μm is 10,000-500,000 per cubic meter), and the filter material is prone to clogging. The cycle may be shortened to 6-12 months. Harsh environments (such as dusty workshops, unpurified outdoor ventilation): A large amount of dust directly impacts the filter material, and the cycle may only last for 3 to

The service life of a filter without separators is not a fixed value. It is usually affected by factors such as the usage environment, filtration load, and maintenance methods, and generally ranges from 6 months to 3 years. The following is a detailed explanation from three aspects: key influencing factors, typical scenario lifespan, and methods to extend lifespan I. Core Factors Affecting Service Life Environmental dust content If the concentration of dust and particulate matter in the air of the application scenario is high (such as in food processing workshops, ordinary industrial areas), the filter material will quickly accumulate dust, the resistance will rise to the upper limit (usually 2-3 times the initial resistance), and the service life may be shortened to 6-12 months. If the environmental cleanliness is high (such as in semiconductor cleanrooms or operating rooms), the dust content is extremely low (≤0.1μm particle count ≤10 /m³), the filter material load is small, and the service life can be extended to 2-3 years. Operating air volume and air velocity When the actual operating air volume exceeds the designed air volume, the erosion of the filter material by the airflow intensifies, the dust accumulation speed increases, and it may

Non-woven filters and woven filters are the two mainstream types of high-efficiency air filters (HEPA), differing significantly in structure (with or without separators), performance, and applicable scenarios. The following is a comparative analysis of both advantages and disadvantages: I. Advantages and Disadvantages of Non-woven Filters Advantages Compact in size and space-saving The filter without separators fixes the filter material through hot melt adhesive or a folding process, without the need for metal or paper separators. Under the same filtration area, its thickness is only 1/3 to 1/2 of that of the filter with separators (for example, the thickness of a conventional filter without separators is about 22-90mm, while that of a filter with separators is 150-300mm). Suitable for scenarios with limited space (such as cleanroom ceilings, small biosafety cabinets). Light in weight and easy to install The filter material and frame material are lighter (such as aluminum frame, plastic frame), and the weight of a single unit is usually more than 50% lighter than that of the filter with separators of the same specification, reducing the load-bearing requirements during installation and labor costs. Lower wind resistance and better energy consumption The filter material folds more evenly, the air flow channel

The non-woven filter, with its advantages such as high-efficiency filtration, compact structure, and low resistance, is widely used in scenarios with extremely high requirements for air cleanliness, mainly covering the following major fields: 1. Pharmaceutical and medical device industry Aseptic production workshop: During the pharmaceutical manufacturing process, from raw material handling, formulation production, to packaging and other links, it is necessary to strictly control the microorganisms and dust particles in the air. The non-woven filter can provide clean air of Class 1-100, ensuring that the drugs meet the GMP (Good Manufacturing Practice) standards. Biopharmaceutical laboratory: It is used in scenarios such as vaccine research and development and bioengineering experiments to prevent the diffusion of aerosols generated during experiments and to avoid the influence of external pollutants on experimental results. Medical device cleaning and disinfection workshop: Purify the air in the cleaning and sterilization environment of surgical instruments and precision medical equipment to prevent secondary pollution. 2. Electronics and semiconductor industry Chip manufacturing workshop: Chip production is extremely sensitive to particles in the air, especially those smaller than 0.1μm. Non-woven filters (such as H14 grade) can effectively filter out such particles, preventing them from adhering to the wafer surface and causing

To determine whether a high-efficiency filter needs to be replaced, it is necessary to combine core indicators such as resistance changes, filtration efficiency decline, and physical condition checks, rather than relying solely on usage time. The following are the specific methods and criteria for judgment: I. Core judgment Index: Resistance (pressure difference) reaches the upper limit The resistance of high-efficiency filters will increase with the increase in usage time (as the filter material gradually clogs due to the adsorption of pollutants). When the resistance reaches the following thresholds, it must be replaced: Standard threshold: The operating resistance reaches twice the initial resistance (industry-wide standard). For example, the initial resistance of the new filter is 150Pa. When the resistance rises to 300Pa during operation, it needs to be replaced. Manufacturer threshold: For some special filters (such as ULPA ultra-high efficiency filters), manufacturers will indicate the upper limit of resistance (such as 400Pa), which should be followed first. Principle: Excessive resistance will lead to a decrease in air volume (affecting the air change rate in the clean room), a sharp increase in energy consumption (increasing the load on the fan), and the filter material is approaching the clogging limit. Continuing to use

The service life of high-efficiency filters is significantly influenced by factors such as environmental cleanliness, the performance of the pre-filtration system, and operating conditions, typically ranging from 6 months to 3 years. The specific duration should be determined based on the following scenarios: I. Core Factors Affecting Service Life Concentration of environmental pollutants Highly polluted environments (such as chemical workshops and dusty workshops): There are many pollutants and large particles, and filters are prone to clogging. Their lifespan is usually 6 to 12 months. Moderately polluted environments (such as ordinary laboratories and food workshops): The amount of dust is moderate, and the lifespan is approximately 1-2 years. Low-pollution environments (such as medical operating rooms and electronic clean rooms): There is less daily dust and strict pre-filtration, with a lifespan of up to 2-3 years. The effectiveness of the pre-filtering system Primary and medium-efficiency filters serve as the “protective layer” for high-efficiency filters. If the pre-filter is replaced regularly (1-2 months for the primary filter and 3-6 months for the medium filter), it can intercept over 80% of large particle pollutants, and the service life of the high-efficiency filter can be extended by 30% to 50%. If the pre-filter fails (such