The following requirements should be met in the arrangement of high-efficiency filters in class 100 clean operating room:
When parallel to the decoration layer or the equalizer layer is arranged on the air supply surface of the lower part of the static pressure box, the full coverage ratio of the filter shall not be less than 0.75.
Net Section Area of High Efficiency Filter
Filling ratio of filters =-----------------------------------------------------------------------------------------------------------------------------------
Total area of section of high efficiency filter
When it is arranged on the side of the hydrostatic chamber, it should be arranged unilaterally or contralaterally, the full coverage ratio of the filter on the side should not be less than 0.75, and the air flow in the hydrostatic chamber should be fully mixed.
3 When restricted by floor height and indoor maintenance, air supply surface with leak-proof function can be used to filter.
The device is arranged outside the static pressure box, but it should be as close as possible to the static pressure box. The air flow in the static pressure box should be fully mixed.
Clean air flow rate is less than 0.85.
Clean air flow passing through the air supply surface
Clean air full coverage ratio
Total area of air supply surface
4. In the clean area below level 100, when centralized air supply outlets are arranged, the final high-efficiency filters in the air supply outlets can be centralized or decentralized, but the equalizing layer must be set on the air supply surface.
5. All clean rooms in the clean operation department should adopt bilateral lower return air. When the distance between the two sides is not more than 3 m, the lower return air on one side should be used, but not on four corners or four sides. Upper return air can be used in clean corridors and clean corridors.
6. The upper height of the lower return air outlet should not exceed 0.5m above the ground, and the lower side of the tunnel should not be less than 0.1M above the ground. The return air outlet of Class I clean operating room should be arranged continuously. The air velocity of indoor return air outlet should not be greater than 1.6m/s, and that of corridor return air outlet should not be greater than 3m/s.
7. Clean operating rooms should adopt indoor return air, and no residual pressure valve should be installed to return air to corridors.
Clean operating room must be equipped with upper air outlet, which should be located at the top of the patient's head. The blast speed of the exhaust outlet should be no more than 2m/s.
No additional air purification units should be installed in class 9 I and II clean operating rooms.
Installation Requirements of High Efficiency Filter in Operating Room
High-efficiency filters belong to hospital purification consumables. In order to ensure the cleaning effect, they are usually replaced every other time. Now most purification areas install high-efficiency filters in the ceiling air supply outlet. Installation methods and methods
Pre-installation confirmation completely determines whether the high-efficiency filter has leaks. The confirmation before installation provides effective objective conditions for more efficient installation, so we must pay attention to the following problems when installing.
1. When transporting and storing high-efficiency filters, they should be shelved in accordance with the direction marked by the manufacturer. During transportation, it should be handled lightly to prevent severe vibration and collision, so as to avoid man-made damage.
2. Before installing the high-efficiency filter, it is necessary to clean, wipe and purify the air-conditioning system. If there is dust in the clean room, it should be cleaned and wiped again to meet the cleaning requirements. If the high efficiency filter is installed in the technical interlayer or ceiling, the technical interlayer or ceiling should also be cleaned and wiped comprehensively.
3. After the clean room and the purified air-conditioning system meet the cleaning requirements, the purified air-conditioning system must be put into trial operation. Continuous operation for more than 12 hours, clean and wipe the clean room again, and install high efficiency filters immediately.
4. Before installation of high-efficiency filters, the appearance inspection must be carried out by unpacking the packages at the installation site. The contents include whether the filter paper, sealant and frame have burrs and rust spots (metal frame). Whether the product is qualified or not, and whether the technical performance meets the design requirements. Then leak detection is carried out. (See Appendix 6 and 1) Installation should be carried out immediately after inspection and leak detection. When installing, the resistance of each filter should be adjusted reasonably according to the size of resistance. For unidirectional flow, the difference between rated resistance and average resistance of each filter on the same air outlet or air supply surface should be less than 5%.
5. The frame for installing high efficiency filters should be flat. The allowable deviation of the flatness of the installation frame of each high efficiency filter is not more than 1 mm. And keep the arrows on the outer frame of the filter in the same direction as the airflow. When it is installed vertically, the filter paper creases should be perpendicular to the ground.
6. When sealing between high-efficiency filters and frames, such methods as gaskets, non-drying glue, negative pressure seals, liquid tank seals and double-ring seals are generally used, the packing surface, filter border surface, frame surface and liquid tank must be wiped clean. The thickness of the gasket should not exceed 8 mm, and the compression rate is 25%~30%. The joint form and material should meet the design requirements, and there should be no leakage at the joints of the frame. When Using Double-Ring seal strip, do not plug the hole in the ring cavity when sticking the seal; both double-ring seal and negative pressure seal must keep the negative pressure pipeline unblocked.
7. At present, most filters in China are installed by sealing gasket method, because the sponge rubber plate is closed-cell and has good air tightness, so it is generally used as sealing material. If necessary, it is better to apply some glass glue evenly on the sealing strip. When connecting the filter and the hydrostatic box, the force around the filter should be uniform. After 24 hours, the glass glue dried and then the purification system was run.
Shandong Aide Purification Engineering Co., Ltd. devotes itself to the fields of medical purification engineering, laboratory system engineering, clean workshop system and so on. After years of development, it has accumulated rich industry experience and gained "China's 3.15 Consumer Trusted Products", "Excellent Engineers in HVAC Purification Industry in 2017" and "Enterprises in 2017". The prize of listing and listing in the stock market reform is a powerful enterprise in the clean Engineering industry. To learn more about the medical purification industry, please pay attention to the Wechat Public Number: Aide-188