One, 　 of clean room principle (one) the clean room of definition 　 　 of clean room is to show air is clean the space that spends those who reach formulary level to be able to offer person activity. Its function is control particle (dust particle) pollution. Will reach the production that satisfies accurate product and scientific test activity. Clean room is not to be confined to absolutely clean, disparate industry and branch are right temperature, temperature, illume, noise, electrostatic, small brace up have quite the muti_function integrated whole of the requirement, it is market structure adornment (what cut off relatively with atmosphere is airtight decorate) , purify conduit of cable of air conditioning, pure water, simple energy of life, power, illume report, craft to wait for a variety of professional technologies the child at an organic whole, clean room (or clean workshop) (2) the classifies implementation laminar flow lowest wind speed of clean room is worth 2.1 classify by utility (can divide it is two kinds big) 　 ① industry is clean room - it is an object with the control of insensate particle. The pollution of particle of dust of main control air to working object, interior maintains commonly controlling state. It applies to accurate and mechanical industry, electron industry (semiconductor, integrated circuit) industry of industry of space navigation industry, tall purity chemistry, nuclear energy industry, smooth magnetism product (CD, film, tape is produced) LCD (liquid crystal glass) , computer hard disk, computer magnetism. ② biology is clean room: Have life particle in order to control (bacterium) with insensate particle (dust) the pollution to working object. Can divide again for: A. Common live thing is clean room, main control is microbial (bacterium) the pollution of the object. At the same time its interior material wants to be able to endure all sorts of sterilization agents to erode, interior maintains commonly pressing. Substantial the industry that its interior material wants to be able to endure all sorts of sterilization to handle is clean room. B. Biologic safety is clean room: The outside life particle is opposite pollution of bound and person that basically controls working target. Interior should maintain with atmospheric negative pressure. 2.2 classify by air current (can divide by air current it is 4 kinds) 　 　 ① . One-way shed clean room (laminar flow, piston flows) 　 　 ② . Shed ③ of clean room 　 in disorder. Radiation flows (inclined stream) ④ of clean room 　 . Mix confluent and clean room (chaos shedding, laminar flow is in together) 　 (3) one-way stream (laminar flow) clean room (say to hang down to flow continuously again, parallel flows) 　 　 (1) already air current with even sectional speed, the clean room that is in next whole room smallpox is sectional passing with single way along parallel streamline. One-way shed clean room to rely on to send wind air current " piston " the extruding action like. Discharge indoor pollution quickly air return way. (the action that 2) wants to realize a piston to flow, the most important is efficient filter must suffusion. But have frame as a result of efficient filter, place tall shovel filter to also want to have support, impossible 100 percent suffusion. So our country " clean workshop designs a standard " regulation, hang down to shed clean room suffusion to be less than than answering continuously 60% , the level is one-way shed clean room to should not be less than 40% , it is local and one-way otherwise flowed. (4) the principle that sheds clean room in disorder and characteristic 　 1, definition: The definition that sheds clean room in disorder is air current with inhomogenous speed it is not parallel flow, companion has the clean room of circumfluence or backset. 2, principle: Shed clean room to rely on to send wind air current ceaseless and attenuant indoor air in disorder, indoor pollution gradually eduction, come real calamity is clean (shed clean room to be designed commonly in disorder level is purified to 300 thousand class in 1000 class above) . 3, characteristic: Shedding clean room in disorder is to rely on take a breath for many times to achieve clean level. Definition of decision of times of air replacement purifies level without what look back (times of air replacement is more, purify level taller) 　 　 (5) the 　 of new wind requirement of clean room is pressed " clean workshop design is normative " regulation, shed clean room new wind force to should not be less than the 10%-30% of total wind force in disorder; One-way shed clean room, new wind force should not be less than the 2%-4% of total wind force, also can decide according to the particular function of clean room of course.

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