Laminar air smallpox [1] is a modern hospital operating room purification device must be used. The device is based on its leading domestic drain layer barrier technology, relying on the operating room Clean Ceiling devices using this equipment can reasonably clean indoor air distribution, effectively ensuring the cleanliness of the room (air plane 100). It can be widely used in hospital operating room clean, clean room, clean animal housing and other projects. Box sheet metal production, surface paint. With the rapid development of modern medical science and technology, surgical techniques for operating room clean condition requirements are also increasing. One hundred laminar flow operating room is the most ideal. But how effective management, the number of colonies laminar flow operating room air compliance issued by the Ministry of Health's Environmental Health air standards, but also meet the grade standard clean operating room, and it was reduced to a minimum, less domestic retrieve documents, is currently clean operating room management worth exploring a new topic. Smallpox is the use of laminar flow air supply clean air technology to take different levels of microbial contamination control, to control the air space environment is suitable for all types of surgery cleanliness requirements; and provide appropriate temperature, humidity, creating a clean and comfortable space surgery environment. Laminar flow clean operating room ceiling for anyone to conduct stringent indoor air filtration to remove bacteria floating in the air, and scientific airflow, so patient, the bacteria produce the medical staff with the air away, will not return to the surgical incision, from the air in order to avoid infection. Therefore, strict air filter, airflow rational organization, is the core technology operating room air purification system. Laminar flow operating room ceiling air purification processes. The new air into the return air segment, mixed with return air, and then into the early effect section, the early effect filters filter out large particles of dust 10um in diameter, into the heat exchanger section and humidification section, temperature, humidity control, and then into the fan pressurized section through efficiency filters, filter dust l-10um, and enters the muffler, the noise down to 58dB below the plenum to the operating room efficiency, high efficiency filter filtered 0.31um-1um of dust, the HEPA, the clean air to the operating room table. Operating room equipped with the early effect of the return air filter, return air duct is also equipped with a silencer on. Installing the operating room more than pressure valve, in order to maintain a constant indoor maintain positive values. Exhaust fan for rapid exclusion of odors and accelerate the addition of new wind.