The cleanliness of a clean room is often affected by airflow. In other words, the movement and diffusion of dust produced by people, machine compartments, and building structures are dominated by airflow. The clean room uses HEPA and ULPA to filter the air, and its dust collection rate is as much as 99.97~99.99995%, so the air filtered by this filter can be said to be very clean. However, in addition to people, there are sources of dust in the clean room, such as machines. Once the generated dust spreads, the clean space cannot be maintained. Therefore, airflow must be used to quickly discharge the generated dust outside. Wind speed control The airflow in the clean room is an important factor affecting the performance of the clean room. Generally, the airflow speed of the clean room is selected between 0.25~0.5m/s. This airflow speed belongs to the breeze area, which is susceptible to interference by people, machines, etc. and tends to be chaotic. , Although increasing the wind speed can suppress the influence of this disturbance and maintain cleanliness, the increase in wind speed will affect the increase in operating costs. Therefore, it should be able to supply at the most appropriate wind speed when the required cleanliness level is met. Achieve appropriate wind speed supply to achieve economic results. On the other hand, in order to achieve a stable effect of clean room cleanliness, the maintenance of uniform airflow is also an important factor. If uniform airflow cannot be maintained, it means that the wind speed is different. Especially on the wall, the airflow will generate vortex along the wall. Achieving high cleanliness is actually very difficult. To maintain a uniform air flow in the vertical laminar flow direction, it must be: (A) There must be no difference in speed in the wind speed on the blowing surface; (B) There should be no difference in the wind speed on the suction surface of the floor return air plate. If the speed is too low or too high (0.2m/s, 0.7m/s), there will be eddy currents. At a speed of 0.5m/s, the airflow is more uniform. Generally, the wind speed of a clean room is 0.25~0.5m. /s between. Influencing factors There are many airflow factors that affect the clean room, such as process equipment, personnel,clean room assembly materials, lighting appliances, etc. At the same time, the diversion point of the airflow above the production equipment should also be considered. Generally, the air flow diversion point on the surface of the operating table or production equipment should be located at the distance between the clean room space and the clean room partition wall 2/3, so that the air flow can flow from the inside of the process area to the work area when the operator is working. The dust is taken away; if the diversion point is placed in front of the process area, it will become an improper air flow diversion. At this time, most of the air flow will flow to the process area, and the dust caused by the opera...
1. What is self-purification time? Self-cleaning time, in English, cleanliness vecoverly characteristic, refers to the time when the cleanliness air conditioning system starts to operate to return to a stable and regulated indoor cleanliness level after the clean room is polluted. 2. How is the clean room's self-purification time tested? Clean room self-purification time 1. The clean room self-cleaning time detection is suitable for non-unidirectional flow clean rooms. 2. The clean room self-cleaning time detection should use artificial dust sources such as atmospheric dust or smoke generators as the benchmark, and should be detected by a particle counter, and the following requirements should be met: (1) When taking atmospheric dust as the reference, the side must stop the clean room for a considerable period of time. When the indoor dust concentration is close to the atmospheric concentration, measure the dust concentration in the clean room near the return air outlet, then turn on the machine, and read it regularly. (Generally, it can be set to read once every 6S), until the dust concentration at the return air outlet returns to the original stable state, record the required time (t). (2) When the artificial dust source is used as the reference, the smoke generator should be placed in the center of the room above 1.8m from the ground, and the smoke should be stopped after 1 to 2 minutes, and then wait 1 minute to measure the dust concentration in the clean room near the return air outlet ( N0). Then boot, the method is the same as above. 3. From the initial concentration (N0), the indoor stable concentration (N), and the actual number of air exchanges(n), the calculated self-cleaning time (t0) can be obtained, which is compared with the actual self-cleaning time (t), if t≤1.2t0 , Is qualified. 4. Self-cleaning time method In addition to the above methods, there are also particle concentration change rate evaluation methods. The self-cleaning time detection method should be negotiated and determined. Welcome to inquiry sliding doors for clean room、cleanroom wall partitions、clean rooms false ceiling and cleanroom ceiling grid system etc.
Hospital operating rooms have very high environmental requirements. How is the air filter installed in the hospital operating room? Today we will introduce the installation principle of the air filter in the hospital operating room. To An air filter in a hospital operating room generally consists of two parts: three air conditioners and two purifiers. The working principle of medical air filters is divided into eight parts: Part 1: Return air section The return air section means that the air volume sent by the exhaust fan reaches the specified air volume, and the recovery system of the medical air filter can send out air. Part 2: Primary filtration Primary filtration is the first filtration procedure performed by non-wind. In this step, we need to replace or clean the equipment for a certain period of time. Part 3: Heating process The heating process is generally an electric heating process used for heating in winter. Part 4: The humidification stage of the medical air filter The humidification stage is mainly to humidify the blower unit through a humidifier, and then reach the temperature for people's affairs. Part 5: Secondary Filtration This is the final filtration stage of the air filter in the hospital operating room. This stage is the final pass to ensure air quality. The air is filtered once, then humidified, and finally filtered again. This ensures the purity of the air and can achieve the medical air filtration effect. Then the filtered air is output. Welcome to inquiry clean room doors&windows、cleanroom wall partitions、cleanroom ceiling grid system、clean room equipment etc.
Operating room laminar flow air supply ceiling-clean air supply ceiling is the clean operating room, the purifying air supply end of the laminar flow ward, it has the functions of high efficiency filtration, flow sharing and air flow compensation. The rationality of the structure of the laminar flow purifying air supply ceiling directly affects the air supply effect and purification level of the operating room. KLCFILTER laminar flow air supply ceiling is the crystallization of the experience and practice of operating room air supply terminal in the past ten years. This type of terminal has been used in nearly a thousand operating rooms. Its superior performance and unique double-layer DPP flow-sharing network energy The airflow is evenly sent to the working area, and the central airflow compensation device can effectively eliminate the influence of updraft caused by the heating of personnel and equipment on the laminar flow. To Operating room laminar flow air supply ceiling-clean air supply ceiling Working principle: The air supply ceiling consists of a high-efficiency air disinfection and filtration system, a fan power system, a noise reduction system, and an operation control system. When working, the fan inhales ambient air, filters it into clean and sterile air through the air purification and disinfection system, and then delivers clean air to the hospital bed area in the cover in a laminar flow, while maintaining a positive pressure in the cover to prevent dust in the external space Particles and microorganisms enter the hood. With the rapid development of modern medical science and technology, surgical technology has increasingly higher requirements for the clean conditions of the operating room. The 100-level laminar flow operating room is currently the most ideal. However, how to effectively manage the number of air colonies in the laminar flow operating room to meet the air environmental hygiene standards issued by the Ministry of Health, and to meet the clean operating room grade standards, and to reduce it to a minimum. There are few domestic search documents and data. A new topic worth discussing in the management of clean operating room. Laminar flow air supply ceiling adopts air cleaning technology to control microbial pollution in different degrees to achieve the requirements of air cleanliness in the controlled space environment and suitable for various operations; and provide suitable temperature and humidity to create a clean and comfortable operating space surroundings. Features of laminar flow ceiling: Hundred-level air supply ceiling-Dust-free purification ceiling manufacturer's new second-generation German FFA technology laminar flow purification ceiling, laminar flow ceiling is the purifying air supply end of clean operating room and laminar flow ward, it has both high-efficiency filtration, uniform flow and air flow Compensation effect. The rationality of the structure of the laminar flow ceiling directly affects the air...
1) Choose materials with good airtightness and small deformation due to temperature changes; when the wall is installed with light steel keel and insulation materials, non-combustible materials or non-combustible materials should be used; (2) The inner wall and ceiling surface of the clean room should be smooth, smooth, free of micro-patterns, avoid light reflection, and be corrosion-resistant. The corners of the wall and the floor should be smooth. Light steel keels are used as partition walls, and measures to prevent collisions must be taken; (3) The floor of the clean room should be good and smooth as a whole, with wear resistance, corrosion resistance and impact resistance. In addition, it should have anti-static and easy cleaning and dust removal functions; (4) When the light ceiling grid is used as the technical inspection space, the maintenance channel shall be laid in the space to the discharge outlet; (5) The exterior wall windows of clean rooms and personnel clean rooms must have good air tightness and have the function of preventing air leakage and condensation; (6) The shape of the doors and windows of the clean room is a simple, smooth structure that is not easy to retain dust and is easy to clean; do not set thresholds; and in order to prevent bacteria from being generated by moisture or deformation of doors and windows, wood products cannot be used for doors and windows in the clean area; (7) The windows of the clean room should be opened toward the room with high air cleanliness level, and the windows should be of sufficient size to facilitate the installation, repair and exchange of general equipment; (8) The inner wall of the clean room for installing doors and windows should be flat, and no window sills should be avoided as much as possible. If there is a window sill, in order to prevent the accumulation of dust and facilitate cleaning, it should be made as inclined as possible; (9) The doors on both sides of the delivery box must be interlocked and airtight, easy to clean; (10) The color of a clean room should be elegant, soft and harmonious. In addition, the light reflection coefficient of the decoration materials on each surface of the room is 0.6-0. 8 for suspended ceilings and walls, and 0.15-0. 35 for the ground. (11) The coatings for walls and ceilings in clean rooms should be flame-retardant, anti-crack, corrosion-resistant, wear-resistant, and have a smooth surface. They should be water-absorbent and non-degradable and mold-free paint; (12) If the walls and ceiling surfaces of the clean room are plastered, advanced plastering standards should be adopted, and the curing time should be sufficient; materials that deform, crack, mold, or pulverize due to heat and humidity should not be used. After plastering, the paint surface layer should be brushed, and the paint should be inflammable, non-cracking, resistant to cleaning, smooth surface, and not easy to absorb water and deteriorate.
Clean room door and window gap treatment: Generally speaking, clean room doors and windows have three types of structural gaps. The first category is: the combined splicing and the installation gap between the door and the clean room door; the second category is: the overlap gap between the door and the opening fan; the third category is: the installation gap between the glass or other core boards. The nature is different and their proportions on the clean room doors and windows are also different. Therefore, the airtight measures adopted for the airtightness of clean room doors and windows are not completely the same. Fixed gap treatment: Not only is the number of installed gaps in each clean room relatively small nowadays, but the combination of the door and the opening is relatively hidden after decoration, and it is a fixed gap that is easier to seal. The connection between the rib and the periphery of the hole should be firm, not only for the closed clean room doors and windows, but also the requirements of the general clean room door structure. Due to the large and fierce force of the clean room door, special attention should be paid to the process and the fixing of the clean room door. Whether the fixed points around the opening are firm and stable, but for closed clean room doors and windows, it must also be emphasized that the gap between the chamber and the clean room door or the hole should be tightly filled, and then covered with indoor and outdoor wall decoration layers. The air tightness of this type of gap is basically guaranteed. The second type of fixed gap is the installation gap of glass or other core panel. The treatment of the movable gap: How to overlap the opening fan of the clean room door and the frame material is the key to the design of the clean room door seal. The gap in the lap joint is different from the fixed gap. Because the movable fan needs to be opened, the wood can adopt the "one-and-for-all" sealing measures. Compared with Zhou, the opening fan of the clean room door is larger, and the movable gap occupies a larger proportion of the total structural gap of the clean room door. The number of openings of the clean room door is much more frequent than that of the clean room. The working conditions of the gaps around the door leaf are also more complicated. Take a single flat open clean room door as an example. The two sides along the vertical direction are small. The side with the handle is often subjected to various frictions or collisions during passage, and the side with the hinge is The direction of force applied to the bore due to the rotation of the fan is completely different from the other three sides. We are professional manufacturers of sliding doors clean room、clean room window、aluminium room door etc.
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