High-temperature resistant filters are air purification devices that can maintain filtration efficiency and structural stability in high-temperature environments (typically withstanding temperatures of ≥150℃, and some special models can withstand temperatures above 300℃). Their filter materials are mostly made of high-temperature resistant materials such as glass fiber, ceramic fiber, and metal fiber, and the frames and sealing parts are also made of high-temperature resistant materials (such as stainless steel, silicone rubber, etc.). This type of filter is mainly applied in scenarios where there is high-temperature airflow and it is necessary to control particulate pollution. The following are its core application areas: 1. High-temperature production processes in industry Metallurgy and Metal processing During the processes of steelmaking, steel rolling, forging, etc., high-temperature flue gas or gas flow contains a large amount of metal dust and oxidation particles. High-temperature resistant filters can be used to purify the high-temperature gas discharged from furnaces and kilns, reduce wear on subsequent equipment (such as heat recovery devices), and at the same time lower air pollution. The purification of circulating air in metal heat treatment workshops (such as annealing and quenching) prevents high-temperature dust from adhering to the surface of workpieces and affecting product quality. Chemical engineering

Although laminar flow hoods and biosafety cabinets both fall under the category of air purification and protection equipment, they have significant differences in design purposes, airflow directions, protected objects, and application scenarios. The core difference lies in the emphasis on protection targets: Laminar flow hoods are mainly designed to “protect products/operation objects from contamination”, while biosafety cabinets are mainly designed to “protect operators, the environment and samples from cross-contamination”. The following are the specific differences: 1. Core functions and protection objectives Laminar flow hood The core function is to provide a local high-cleanliness environment, with a focus on protecting the operating objects (such as medicines, chips, food, etc.) from contamination by particles and microorganisms in the external environment. The protection direction is unidirectional protection: Only the products/materials within the operation area are purified and protected, without specifically considering the protection of the operators or the external environment. Biosafety cabinet The core function is to achieve multiple protections, with a focus on safeguarding operators, the laboratory environment, and operation samples (such as microorganisms, viruses, toxic reagents, etc.), to prevent cross-contamination among the three. The protection direction is bidirectional/three-directional protection: it not only prevents the sample from contaminating the environment and personnel,

Class A laminar flow hoods are air purification devices capable of providing A local Class A clean environment. Their core function lies in high-efficiency filtration (typically using HEPA or ULPA filters) and unidirectional airflow organization. The concentration of suspended particles in local areas is controlled at an extremely low level (meeting the Class 5 or higher standards in ISO 14644-1, corresponding to the A-level clean area requirements in GMP), and it is widely applied in fields with extremely high cleanliness requirements. The following are its main application fields: The pharmaceutical and biopharmaceutical industry This is the most core application field of Class A laminar flow hoods, which is directly related to the quality of drugs and patient safety. Sterile preparation production: such as injections (infusions, freeze-dried powder injections, small water injections), ophthalmic preparations, etc., in key operation links such as filling, sub-packaging, capping, and freeze-drying out of the box, A-class laminar flow hoods must be used to protect the products from environmental microorganisms and particle contamination. Biological product manufacturing: In the production processes of vaccines, blood products, genetic engineering drugs, etc., sensitive materials such as living cells and viruses are involved. A-level laminar flow hoods can prevent the materials from

Due to their different functional characteristics, the activated carbon adsorption cabinet and the fresh air pressurization cabinet have obvious differences in their applicable scenarios, as follows: I. Applicable Scenarios of Activated Carbon Adsorption Cabinets The core of the activated carbon adsorption cabinet is to adsorb odors and organic pollutants in the air (such as formaldehyde, VOCs, stench, etc.) through activated carbon, focusing on the purification of existing air without the need to introduce outdoor fresh air. It is suitable for the following scenarios: 1. Places with local pollutants or odors Newly renovated/refurbished Spaces: newly renovated residences, offices, children’s rooms, etc., can absorb harmful gases such as formaldehyde, benzene, and TVOC released by decoration materials, reducing the concentration of indoor pollutants. Kitchen/Dining area: For family kitchens and the back kitchens of small restaurants, it can absorb the smell of cooking fumes and food residues, reducing the spread of indoor cooking fumes. Bathroom/Pet activity area: The damp odor, pet feces, or body odor in the bathroom can be quickly improved in local air quality through activated carbon adsorption. Laboratory/small workshop: A place involving operations of chemical reagents, inks, adhesives, etc., which can adsorb volatile harmful gases (such as acetone, toluene), protecting the

Although both the fresh air booster cabinet and the activated carbon adsorption cabinet are related to air treatment, they have significant differences in core functions, working principles, and application scenarios, as follows: I. Core Functions and Design Objectives Fresh air booster cabinet The core function is to introduce and purify fresh outdoor air, while maintaining positive indoor pressure through pressurization to improve indoor ventilation and air quality. Its design objective is to address the issues of “insufficient air circulation” and “intrusion of external pollutants”, with a focus on “fresh air supply” and “air pressure control”. Activated carbon adsorption cabinet The core function is to purify the existing air in the room or specific space, removing odors and harmful gases (such as formaldehyde, VOCs, stench, etc.) in the air through the adsorption effect of activated carbon. Its design goal is to solve the problem of “existing air pollution”, with the focus on “air purification” rather than “fresh air introduction”. Ii. Working Principle Fresh air booster cabinet Fresh air is extracted from outside and passes through a filtration system (such as primary and medium-efficiency filters, with some including high-efficiency filters) to remove particulate matter, dust, pollen, etc. The filtered fresh air is

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