Air Purification & Air Filters - Air Filters

1. Air purification: 1. Overall purification: It can be divided into laminar flow type and turbulent flow type. Laminar flow means that the air flows from one side to the other side at the same speed, so that the dust particles or bacteria generated in the room will not spread to the surrounding and be pushed out of the room, so as to achieve a good sterilization effect. 2. Local purification: ⑴Clean laminar flow hood: The clean laminar flow hood is a local air purification device in the hospital. Generally, a vertical laminar flow method can be formed, and a transparent enclosure is used around it. The air of high cleanliness (class 10,000 to class 100) can be maintained in the entire hood. This clean laminar flow hood can be used for the treatment and protection of immunocompromised patients, so it is also called a sterile bed laminar flow hood. (2) Purifying the operating table: The air in the box is purified by horizontal or vertical laminar flow, which can make the purification in the operating table reach a high level. ⑶Electrostatic adsorption sterilization and purification technology: Electrostatic adsorption sterilization is based on the principle of industrial electrostatic precipitator, and has some innovations in miniaturization technology. ①Use the thin wire discharge electrode and the honeycomb aluminum box collector to form a grade line device; ②Use the mirror image force to charge adsorption. At present, there is a three-stage purification device, that is, pre-filtration-high-efficiency filtration-activated carbon adsorption, combined positive ion electrostatic adsorption sterilization, and use of large air volume air purification to ensure the number of indoor air purification, which is a good solution to the key departments of the hospital such as The continuous disinfection of the air in operating rooms, ICUs, maternal and child wards, hemodialysis rooms, etc. under the condition of people, can make the purification and cleanliness of indoor air in the hospital reach 100,000 to 10,000. (4) Negative ion purification technology: Negative ion is a negatively charged chemical group that can undergo reversible changes, has a very short existence time, and has no ability to kill microorganisms. Combined, multiple particles agglomerate and become larger and settle down quickly, so that the air can achieve the purpose of purification. Only when negative ions in the air have certain chemical properties, such as active oxygen ions, can they have the ability to infringe on proteins and thus kill microorganisms. Therefore, the ability of negative ions to purify the air is relatively limited, and the removal rate of microbial particles in the air can only reach 70%~90%. 2. Air filter: This is the core component of air purification. It adopts the filtering method (at least three levels: initial effect, medium effect, high efficiency or sub-efficiency) to make the air supply air clean. In the non-single-flow clean room, by rationally arranging the air supply and return air, it depends on the diffusion of clean air supply. Dilution, the pollutants are diluted and discharged from the return air outlet. Maintain pharma clean room aerosol concentrations within the required range. In the single-phase flow clean room, the contaminants can be 'pressed' out from the return air by the 'piston'-like push action of the clean supply air flow. 1. Primary-efficiency air filter: The primary-efficiency air filter is suitable for primary filtration of air-conditioning systems, mainly used to filter dust particles above 5μm. Inexpensive, light weight, versatile and compact. Features: The primary air filter has four styles: plate type, folding type, bag type and box type. The outer frame materials include paper frame, aluminum alloy frame, galvanized iron frame, and stainless steel frame. The filter material includes non-woven fabric, nylon mesh, Activated carbon filter cotton, metal mesh, etc. The protective net includes double-sided plastic-sprayed wire mesh and double-sided galvanized wire mesh. Inexpensive, light weight, versatile and compact. 2. Medium-efficiency air filter: Medium-efficiency air filters are mainly used in central air conditioning and centralized air supply systems. It can be used for primary filtration of air-conditioning systems to protect the next-level filter in the system and the system itself. In places where air purification and cleanliness requirements are not strict, the air treated by the medium-efficiency air filter can be directly sent to the user. Medium-efficiency air filters are widely used in industrial purification of central air-conditioning ventilation systems, pharmaceuticals, hospitals, electronics, food, etc. Medium-efficiency air filters can also be used as front-end filtration of high-efficiency air filters to reduce the load of high-efficiency air filters. , prolong its service life. Features: The frame of the medium-efficiency air filter (bag filter) is in the form of cold plate spraying, galvanized sheet, etc. The filter material is non-woven fabric, glass fiber, etc., the filtration particle size is 1~5um, and the filtration efficiency is 60~95% (ratio Color method), filter materials are usually divided into: F5 (khaki), F6 (green), F7 (light pink), F8 (light yellow), F9 (white). Medium-efficiency air filters are divided into two types: bag-type and non-bag-type, among which bag-type includes F5, F6, F7, F8, F9, non-bag-type includes FB (plate-type medium-efficiency filter), FS (partition-type medium-efficiency filter) filter), FV (combined medium efficiency filter). 1) Function: capture 1-5um dust particles 2) Filtration efficiency grade: F5, F6, F7, F8, F93, high-efficiency air filter: high-efficiency air filter is mainly used to capture particle dust below 0.5um and various suspended matter. The air purifier is mainly composed of a filter element and a shell. The basic requirements are high filtration efficiency, low flow resistance, and continuous use for a long time to reduce the cost of later consumables. Features: Using ultra-fine glass fiber paper as filter material,Offset paper, aluminum film and other materials are used as dividing boards, which are glued with wooden frame aluminum alloys. They are made of special silicone rubber. They are odorless, the surface will not harden, and there will be no cracks for a long time. The chemical properties are stable and corrosion-resistant. Absorb the stress generated by thermal expansion and contraction without cracking, moderate softness and hardness, and good elasticity recovery. Each unit has been tested by the sodium flame method and has the characteristics of high filtration efficiency, low resistance and large dust holding capacity. High-efficiency air filters can be widely used in optical electronics, LCD liquid crystal manufacturing, biomedicine, precision instruments, beverages, food, PCB printing and other industries in the dust-free purification pharmaceutical cleanroom of the air-conditioning end air supply. Both high-efficiency and ultra-high-efficiency filters are used at the end of the clean room, and their structural forms can be divided into: high-efficiency with partitions, high-efficiency without partitions, high-efficiency air volume, and ultra-high-efficiency filters. The filter element refers to the air filter, and the high-efficiency air filter plays a vital role in the air purification industry.

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