Hospital operating room renovation project
气压力根据其不同区域（如手术间、无菌 准备间、刷手间、麻醉间和周围干净区域等）洁净度 不同要求而不同。 The air pressure in the operating room varies according to the cleanliness of different areas (such as the operating room, sterile preparation room, brushing room, anesthesia room, and surrounding clean areas) . 其空 气洁净度标准不同，例如美国联邦 标准1000级为每立方尺空气中 ≥0.5μm的尘粒数，≤1000颗或每升空气中 ≤35颗。 Different levels of laminar flow operating rooms have different air cleanliness standards. For example, the US Federal Standard Class 1000 is the number of dust particles ≥ 0.5 μm per cubic foot of air , ≤ 1000 particles or ≤ 35 particles per liter of air . 的标准为每立方尺空气中 ≥0.5μm的尘粒数，≤10000颗或每升空气中 ≤350颗。 The standard for a class 10000 laminar flow operating room is the number of dust particles ≥ 0.5 μm per cubic foot of air , ≤ 10,000 particles or ≤ 350 particles per liter of air . And so on. 气量；去除尘埃和微生物；保持室内必要的正压。 The main purpose of ventilating the operating room is to eliminate the exhaust gas in each work room; ensure the necessary amount of fresh air in each work room ; remove dust and microorganisms; and maintain the necessary positive pressure in the room. 方式有以下两种。 There are two types of mechanical ventilation that can meet the ventilation requirements of the operating room . 、换气量及室内压力，通气效果较好。 Combined use of mechanical air supply and mechanical air exhaust: This ventilation method can control the number of ventilations, the ventilation volume and the indoor pressure, and the ventilation effect is better. Mechanical ventilation and natural exhaust are used together. The ventilation and the number of ventilations of this ventilation method are limited, and the ventilation effect is not as good as the former. 的尘埃粒子数和生物粒子数来区分。 The cleanliness level of the operating room is mainly distinguished by the number of dust particles and biological particles in the air . Currently, the most commonly used is the NASA classification standard. 技术通过正压净化 送风气流控制洁净度来达到无菌 的目的。 Purification technology achieves the purpose of sterility by controlling the cleanliness of the supply air flow with positive pressure purification .
方式不同，净化 技术可分为絮流 系统和层流系统两种。 Purification technology can be divided into two types : flocculation system and laminar flow system. 设于顶棚，回风口设于两侧或一侧墙面下部，过滤器 和空气处理比较简单，扩建方便，造价较低，但换气次数少，一般为10～50次/h，容易产生涡流，污染粒子可能在室内涡流区悬浮循环流动，形成污染气流 ，降低室内净化 度。 (1) Multi-Directional Manner: The air inlet and high-efficiency filter of the turbulent system are set on the ceiling, and the air return port is set on the sides or the lower part of the wall. , The cost is low, but the number of air exchanges is small, generally 10 to 50 times / h, eddy currents are easily generated, and polluting particles may circulate in the indoor vortex area, forming a polluted air flow , and reducing indoor purification . 室。 Only applicable to cleanrooms of class 10 000 to 1000 000 in NASA standard . 度随换气次数的增加而提高，适用于美国宇航局标准中100级的手术室。 (2) Laminal Flow System; The laminar flow system uses a uniformly distributed and appropriate flow velocity to bring particles and dust out of the operating room through the air return port. There is no vortex, so there is no floating dust. The increase in gas frequency increases and is suitable for a 100-level operating room in NASA standards. 密封破损率比较大，且造价较高。 However, the damage rate of the filter seal is relatively large, and the cost is high.
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