In the past, if clean room environment safeguards personnel to want to assure a factory to the air in is achieved or exceed acceptable clean level, their practice raises filter namely filter efficiency and increase indoor take a breath to measure. However, air quality standard and solid Wu examine a result to make clear however, function of exorbitant requirement filter or empty throughput cannot be taken, because it is head and shoulders above the level of need of moving place of high-powered clean room. So far, air is handled and adjust the proportion that holds in the moving cost of clean room is the largest. The quantity of indoor take a breath that researcher discovers to the clean room that is as high as 40% runs cost and original and devoted cost and unit hour is concerned, the charge of 10~30% is used at sending wind, the purpose is to increase air in clean room " sweep " action. To filter, filter efficiency is taller, capture particle is more, inhaler cost can be higher also. This explained filter is pressed adequately fall to sweep the concern between efficiency with particle. Optimal method is maintain on one hand or improve filter data filter efficiency, the resistance that reduces air flow on the other hand reduces those who bring to bear on to go up in filter to press fall, thereby managing moving cost. In a lot of application, filter manufacturer is forced to rise ceaselessly filter efficiency, make its are head and shoulders above reasonable level. In the meantime, more and more final users begin attention and the electric power cost that moving air purifies a system to concern. So, find filter the equilibrium point between efficiency and cost is urgent affairs. 1. New evaluation already some occupation standard basically are aimed at discharge and quantity of take a breath with superintendency standard. Crucial question is: The standard asks to carry end HEPA to filter moves with the speed of 90FPM or have a test is without technical support, harmful even. Because indoor and average velocity of flow can cause turbulence too high to form eddy current, so the ISO1 class in semiconductor industry or clean room uses 2 level basically the velocity of flow of 75FPM. Make clean room or filter velocity of flow maintain can cause serious turbulence not only in 90FPM, still can make contaminant raise, dispersed the possibility in whole and clean room rises. Actually, filter the expression of the filter with inferior speed is ambitious at speed taller, the function of the edge face velocity of flow of filter and clean room has nothing to do. Truly important is indoor atomic chroma and the biology negative charge that spread through air the level is running process middleman and guarantor to hold changeless. Additional, the design goes out can achieve " proper " velocity of flow and the system that take a breath leads are very important. It is likewise important that devoted on filter at the beginning higher cost and long-range electric power run cost. A lot of clean rooms did not consider when build the likelihood needs more electric power and the product that add accordingly to produce cost at all. The consequence that increases filter amount blindly is you must consider profit space to whether can be propped up higher and higher initiative cost and higher moving cost. 2. Miniaturization trend as enter stage of production of accept rice technology, manufacturing space and the size that produce equipment do smaller more, the space that need maintains clean is less also cleaner. Reason can raise flexibility and managing cost through all sorts of methods. A lot of companies hope to get more effective clean room on one hand, also seeking the means that runs cost through reducing power comsumption to cut down actively on the other hand. And the flow of proper design air, clean air gross that reduces sanitary district need, it is to reduce prime cost and the effective method of moving cost. As HEPA and ULPA filter efficiency rises ceaselessly, the requirement of efficiency of user opposite filter is in however drop. Show the user nowadays to pay attention to an analysis what to need actually is in in clean room inside different area more filter level. A fundamental trend uses large space no longer namely clean, those who replace is clean area is set in the factory, assure to air quality maintains to reach admirable level inside clean area. Used this kind of method to reduce the air gross that need filters, also reduced moving cost. In addition, equipment and filter manufacturer are developing property hard stronger, more province report and the blower with minorrer volume. Air current is pressed through when filter enters a room, be being formed fall, this must lean blower restores with air adjustment equipment. Should fall a little only low pressure falls to be able to reduce expenditure of one part charge of electricity, use at the expenditure of charge of electricity of fan especially, and the main defray that this is business of operation of major clean room. First choice answers to satisfy when choosing filter filter to efficiency asks and be pressed fall the smallest filter. When the value that measures filter and function, efficiency and pressure falling is crucial. The collection that other element decides whole HEPA and ULPA filter efficiency. Include air to filter among them, speed, atomic animal sacrifice and filter medium feature. In general, collect efficiency to meet as filter of speed reduce rise with the accretion of atomic dimension. In addition, collect efficiency to meet as filter the Baidu of ash piece rises with the addition of density. 3. Lengthen filter life to be told from many sided, the life that prolongs filter is the focal point that people considers. Electrostatic charging is now a kind of technology that filter medium uses, it can improve the capacity of atomic filter and life. Its advantage depends on can be in specific product undertake on HEPA filter electrostatic charge, through a few remarkable, can the method of statistical amount will reduce cost, enhance performance, and filter manufacturer besides enhance performance still need to provide the data about running cost actually besides cost. There are a lot of electrostatic filter systems on the market at present, the method that they use bar standard and is not direct intercept captures through filter medium air is atomic, in industry of Dan Zaijie clean room, because open the cause of bar case technology, they just still basically are made beforehand filter system is used. Still can use more effective air to filter beforehand the action that the technology will come to develop it adequately, this both neither can increase air static pressure, also won't raise pay of charge of electricity, that is to say the pay that electrostatic action won't raise charge of electricity to go up significantly. Contain dirt quantity to increase not only, the static electrodeposit technology that perfects ceaselessly still can prolong filter life and reduce filter to safeguard. This is an important gains, for the company that gets control to equipment of pharmacy, medical treatment and other especially, the load amount that wants HEPA filter only sheds limitation to be under their moving standard compatibly, they need not change HEPA filter. Because change,filter can raise cost not only, and can suspend production, need time of prearrange good stop work, undertake new cleanness, new attestation is mixed affirm afresh. Include complete set even in regulating system of assembly parts of filter medium, filter, air the supplier such as clean room is various below the joint efforts, filter technology and design gain a lot of new headway. In last few years the progress of technology and design basically is reflected offerring effective " proper " air government measure, the price of the sources of energy that rises in order to suit ceaselessly and stricter empty temperament measure a level. Production domain of the clean room operator of continuation and other realises the air of use consciousness filters to be able to achieve the requirement of gain adequately.

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