As the “connection hub” between the sterile and non-sterile environments in hospitals, the stability of the equipment performance of medical transfer Windows directly affects medical safety. To avoid the risk of cross-contamination caused by equipment failure, it is necessary to establish a systematic maintenance and care system. The specific methods can be divided into four major modules: daily maintenance, regular inspection, special maintenance of core components, and emergency handling. The following is a detailed explanation:   I. Daily cleaning and Disinfection: Basic protection is indispensable Daily cleaning should follow the principle of “clean first, then disinfect”, and be carried out at least once a day. For areas with high usage frequency (such as ICU and infectious disease wards), the frequency should be increased to 2-3 times. The specific steps are as follows: Surface cleaning: First, wipe the inner and outer walls of the transfer window, door frame, handle and observation window with a soft cloth dipped in neutral detergent (such as medical-specific multi-enzyme cleaner) to remove surface dust and stains. The gaps (such as door shafts and sealing strips) should be cleaned with a soft-bristled brush to prevent dirt accumulation and poor sealing. ​ Disinfection treatment: After cleaning, use medical

The transfer window is a key device for transferring items between sterile and non-sterile hospital environments. Its efficient air purification, disinfection functions, and sealed isolation design make it essential in many core hospital areas. The device helps avoid cross-contamination during item transfer, ensuring medical safety and the quality of diagnosis and treatment. Below is a detailed explanation by application scenario: I. Operating Room Area The operating room is one of the hospital areas with the highest aseptic requirements. Here, the transfer window acts as an important “bridge” between the operating room and external areas like the instrument preparation room and dressing room. Before an operation, nurses use the transfer window to bring in sterilized surgical instruments, dressings, and disposable surgical consumables. At this stage, the transfer window activates a dual purification process: ultraviolet disinfection and high-efficiency air filtration (HEPA). This process sterilizes the item surfaces and internal air, preventing non-sterile air from entering the operating room. After surgery, used and contaminated instruments and medical waste (which are sealed and packaged) are transferred out through the window to the external treatment area. This procedure helps prevent bacteria spreading by direct contact and protects medical staff from contamination. Some transfer windows in

In the pharmaceutical industry, the high-efficiency exhaust unit mainly serves GMP compliance, personnel safety protection and environmental protection standards, covering key scenarios throughout the entire process from production, experimentation to auxiliary operations. Chemical Synthesis Workshop Active pharmaceutical ingredient synthesis section: Discharge toxic and harmful gases (such as solvent vapor, hydrogen chloride, ammonia) produced by reaction vessels and distillation devices to prevent personnel poisoning and environmental leakage. Intermediate production area: Treats volatile organic compounds (VOCs) from processes such as esterification and nitrification, and cooperates with waste gas treatment equipment to achieve standard emissions, meeting environmental protection requirements. High-activity pharmaceutical ingredient (API) production area: Closed exhaust and high-efficiency filtration are adopted to prevent the spread of high-activity dust or aerosols, avoiding cross-contamination and occupational exposure of personnel. Preparation production workshop Solid dosage form crushing/screening/mixing section: Exhaust drug dust (such as dust from tablet and capsule raw materials) to prevent the risk of dust explosion and maintain the cleanliness of the workshop (meeting GMP grade D/above requirements). Liquid formulation preparation/potting area: Discharge solvent volatile gases and acid and alkali waste gases to prevent equipment corrosion and affect product stability. Aseptic preparation workshop (freeze-drying, filling area) : Discharge a small amount of microbial aerosols

High-efficiency exhaust units are deployed in environments demanding stringent air quality control, given their capability to rapidly evacuate contaminated air, uphold ISO-class cleanroom standards, and maintain differential pressure, including: I. Industrial production field In industrial environments, high-efficiency exhaust units function as critical point-source ventilation systems for hazardous substance containment, ensuring both occupational safety and process integrity. For example, in chemical manufacturing, paint shops, and printing facilities where volatile organic compounds (VOCs) are generated, these units enable real-time extraction of airborne contaminants, mitigating explosion risks and long-term exposure hazards such as toxic inhalation. In electronics assembly, localized exhaust ventilation systems remove welding fumes and particulate matter, preventing deposition on microelectronic substrates. In metal fabrication and grinding operations, continuous removal of metallic particulates reduces abrasive wear of machinery and lowers incidence of occupational pneumoconiosis. Ii. Medical and health care field The medical environment has extremely high requirements for air cleanliness and sterility, and the application of high-efficiency exhaust units is particularly important. In hospital operating rooms, it can maintain a negative pressure environment indoors, preventing bacteria and odors generated during surgeries from spreading to other areas. At the same time, it is combined with a purification system to ensure the cleanliness of

In the air purification system of a cleanroom, the pleated high-efficiency filter (HEPA) achieves terminal air purification through the full-process coordination of “pre-treatment + core filtration + airflow control + sealing guarantee”. The specific path is as follows: First, rely on the “preprocessing protection” of pre-filtering. Terminal purification is not achieved by HEPA alone. Its front end is connected to primary and medium-efficiency filters to form a “three-stage filtration chain” : the primary filter first removes large particles with a diameter of more than 5μm in the air (such as dust and hair), while the medium-efficiency filter intercepts medium particles with a diameter of 1-5μm (such as pollen and fiber debris). This step can prevent large particles from clogging the precision filter paper of the HEPA, reserve core filtration capacity for terminal deep purification, and at the same time extend the service life of the HEPA. ​ Secondly, the “high-efficiency filter carrier” relying on its own structure. As the core of terminal purification, the structural design of HEPA directly determines the purification effect First, the filter paper is made of glass fiber or synthetic fiber. The fibers interweave to form a filter layer with extremely small pores, which can precisely

In the production of high-precision products, the air cleanliness of cleanrooms directly determines product quality. With a filtration efficiency of over 99.97% for 0.3μm particles, the pleated high-efficiency filter (HEPA) has become the core equipment of air purification systems. ​ Its operation relies on the interception and inertial collision effects of filter paper (glass fiber or synthetic fiber), while the partition separates the filter paper to form a uniform air flow channel, enhancing the structural strength at the same time to ensure the stability of filtration. ​ In the air purification system of clean workshops, HEPA mainly plays two core roles: one is the terminal filtration, which is installed in the supply air system close to the clean room. The air that has been pre-treated by primary and medium-efficiency filters and then deeply purified by HEPA can meet the strict cleanliness level requirements from Class 1 to Class 100, such as preventing tiny particles from adhering to chips in the electronics industry and avoiding performance damage. The second is the fresh air treatment. Outdoor fresh air contains a large amount of dust and microorganisms and needs to be finally filtered by HEPA. After meeting the standards, it is mixed with

The core requirements for vertical flow workbenches in the biomedical field revolve around three key areas: sterility assurance, biosafety, and compliance. It is necessary to prevent sample contamination and also avoid the leakage of harmful microorganisms that could endanger operators. These requirements precisely match the high-risk characteristics of biomedical scenarios (such as cell culture and microbial testing), and can be specifically classified into the following five categories: 1. Ultimate cleanliness and air flow control This is the foundation for ensuring that the samples are not contaminated by miscellaneous bacteria, and the requirements are far higher than those in ordinary industrial scenarios. Cleanliness grade: It must reach ISO level 5 (Class 100), that is, the number of particles ≥0.5μm per cubic meter of air is ≤ 3,520, and there are no live microorganisms (sedimentation bacteria and airborne bacteria tests are required). Airflow stability: The vertical airflow velocity should be controlled within the range of 0.36-0.54m/s, and the airflow uniformity should be no less than 80% to prevent local airflow disorder from causing pollution diffusion. Airflow isolation: An “air curtain barrier” needs to be formed to prevent external non-clean air from invading from the edge of the workbench. In some scenarios, negative

The vertical flow workbench is an air purification device that provides a local high-cleanliness environment. Its airflow moves vertically, isolating external pollution and preventing the spread of pollutants during operation. It is widely used in fields with high cleanliness requirements, such as: I. Biomedical Field In microbiological research, it is used for experiments such as isolating, culturing, and identifying microorganisms like bacteria, fungi, and viruses. For example, when studying new pathogenic bacteria, researchers operate within a vertical flow workbench. This setup prevents external contaminants from affecting samples and reduces health threats to operators by containing pathogens. ​ Cell culture: The culture of animal cells, plant cells and stem cells has strict requirements for environmental cleanliness. The vertical flow workbench can create a sterile and dust-free environment, ensuring that cells are not contaminated during the culture process and maintaining their normal growth state and biological characteristics. It is an indispensable device in cell laboratories. ​ Medical device handling: For some precision medical devices (such as minimally invasive surgical instruments and ophthalmic surgical instruments), the assembly and debugging before use, as well as the cleaning, disinfection and examination after operation, need to be carried out in a clean environment. The vertical flow

I. Core Difference: Airflow Direction Vertical flow workbench Airflow direction: Clean air flows vertically downward from the top of the workbench, passes through the operation area, and is discharged from the bottom or side. ​ Features: The airflow coverage is uniform, effectively isolating the operation area from the external environment and reducing cross-contamination. ​ Horizontal flow workbench Airflow direction: Clean air is horizontally blown out from the back or side of the workbench, flows horizontally through the operation area, and is finally discharged from the front or the other side. ​ Characteristics: The airflow path is short and directly acts on the operating surface, but it is easily disturbed by external airflow. ​ Ii. Differences in Structure and Working Principle Dimension Vertical flow workbench Horizontal flow workbench Fan position It is usually located at the top and works in conjunction with a high-efficiency air filter (HEPA) to supply air downward Mostly on the back or sides, the fan is linked with the HEPA for horizontal air supply Operating space The top is unobstructed and the vertical space is spacious, making it suitable for handling large samples There is ample space in the horizontal direction, but there is an air supply

The core feature differences of supply air ceilings with different cleanliness grades are mainly concentrated in the filtration configuration, air flow pattern, structural design and applicable scenarios. The higher the grade, the stricter the cleanliness control and the more refined the functional configuration. The specific features are as follows: Class I (100 grade/ISO 5 grade) : High-purity and high-stability type Filtration system: Equipped with 8-10 H14 grade high-efficiency filters (filtration efficiency ≥99.995%@0.3μm), combined with a three-stage enhanced filtration system of “primary efficiency + medium efficiency + high-efficiency”, it has the strongest microbial interception capacity. Airflow organization: The entire room adopts a vertical unidirectional flow, with the wind speed stabilized at 0.25-0.35m/s, forming a “piston-like” airflow. There are no vortex dead corners, and the uniformity of cleanliness in the surgical area is the best. Structural design: Dimensions ≥2.95m×2.5m, adopting a leak-proof design. A medium-speed airflow compensation device is installed in the middle area to accommodate large shadowless lamps and prevent airflow attenuation. The panel is made of 304 stainless steel with an antibacterial coating, featuring extremely strong sealing performance (the splicing gap is ≤0.5mm). Adaptation core: Specifically designed for high-risk surgeries, it has slightly higher operating noise (but ≤65dB), higher energy

I. Background of the Plan During the production process of food processing plants, pollutants such as dust and microorganisms (like bacteria and mold) in the air can easily cause food contamination. This affects product quality and safety. As the core equipment for controlling air quality in the workshop, the filters that come with air handling equipment are vitally important. The non-woven high-efficiency filter (HEPA) is ideal for air treatment equipment in food processing plants. It has several advantages: high filtration efficiency, compact structure, and low resistance. ​ Ii. Key Points for Selecting High-Efficiency Filters Without Separators (1) Filtration efficiency Select the appropriate filtration efficiency based on the cleanliness level requirements of the food processing plant. For general food processing workshops, such as pastry and biscuit processing, use high-efficiency filters without separators rated H13. For workshops with high cleanliness requirements, such as dairy products and aseptic filling, use filters without separators with H14 or U15 efficiency. This ensures effective filtration of tiny particles and microorganisms in the air. (2) Air volume matching The rated air volume of the filter needs to match the air volume of the air handling equipment. When selecting the type, it is necessary to ensure that the

The daily maintenance of liquid tank high-efficiency filters is a key link to ensure their filtration efficiency, prevent clean environmental pollution and reduce production risks. Maintenance work should be carried out in a targeted manner in combination with its core structure of “liquid tank seal + high-efficiency filter material”. The specific key points are as follows: I. Basic Inspection: Daily/Weekly regular inspection Appearance and sealing condition inspection (once a day) Liquid tank observation: Check whether the sealing liquid in the liquid tank is clear, free of turbidity, odor, and floating impurities (such as dust and flocs). Check whether the liquid level is within the specified range (usually 1/2-2/3 of the liquid tank height, please refer to the equipment manual for details). If the liquid level is too low, replenish the same type of sealing liquid in time (avoid mixing different brands or types to prevent chemical reactions from damaging the sealing effect). ​ Filter material appearance: Check through a transparent observation window (or regular disassembly and inspection) whether there is any damage, deformation or bulging on the surface of the filter material, and whether the edge fits tightly with the sealing part of the liquid tank without lifting edges or