不同潔凈度等級(jí)的潔凈區(qū)的劃分原則
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- 發(fā)布日期：2017-04-13 17:50:00
在確定潔凈區(qū)劃分原則時(shí)，首先需要確定保護(hù)對(duì)象
In determining the principle of division of the clean area, the first need to determine the protection object
1） 保護(hù)生產(chǎn)過(guò)程（產(chǎn)品）不受人員和環(huán)境污染；
1) to protect the production process (product) without the personnel and environmental pollution;
2） 保護(hù)人員（環(huán)境）不受生產(chǎn)過(guò)程污染；
2) the protection of persons (environment) is not subject to the process of production;
3） 防止生產(chǎn)過(guò)程與人員（環(huán)境）相互污染，即要綜合防護(hù)，1）和2）兩項(xiàng)同時(shí)要采用。
3) to prevent the production process and personnel (environment) mutual pollution, namely to comprehensive protection, 1) and two, while the use of.
如果要求采用隔離（屏障）工藝，即必須采用物理屏障密閉局部潔凈區(qū)，這樣就需要隔離：
If the requirements of the use of isolation (barrier) process, that is, the physical barrier must be confined to the clean area, which requires isolation:
1. 使生產(chǎn)過(guò)程與周?chē)h(huán)境（人員）隔離；
1 to isolate the production process and the environment (personnel);
2. 使環(huán)境、人員與生產(chǎn)過(guò)程隔離；
2 isolate the environment, personnel and production process;
潔凈室技術(shù)被廣泛應(yīng)用于保護(hù)生產(chǎn)過(guò)程（產(chǎn)品），不受人員和環(huán)境污染。為此需遵循下列三項(xiàng)原則之一：
Clean room technology is widely used in the protection of the production process (product), not the personnel and environmental pollution. One of the following three principles should be followed:
1.使?jié)崈羰冶３直揉徑块g更高的氣壓；
Make clean room maintain pressure of 1 neighboring room more;
2.在潔凈區(qū)與較不潔凈區(qū)的分界處應(yīng)保持較高的排風(fēng)風(fēng)速；
2 in the clean area and the relatively clean area of the boundary should be maintained at a high speed of the wind;
3.采用物理隔離的方式隔離不同的區(qū)域。
3 separate different regions by means of physical isolation.
壓差原則就是防止較不潔凈區(qū)的氣流向潔凈區(qū)倒灌（例如通過(guò)門(mén)縫），即在潔凈室內(nèi)保持恒定的高壓（５～２０Ｐａ）。其氣流組織原則是低速氣流由潔凈室向著鄰近區(qū)域并保持相對(duì)高的壓差。受控參數(shù)就是壓差。
Pressure difference principle is to prevent the air is not clean area to the clean area intrusion (for example through the crack of the door), namely in the clean room maintain a constant pressure (5 ~ 20). The principle of the air flow organization is that the low velocity air flow is from the clean room to the adjacent area and remains relatively high. Controlled parameter is differential pressure.
排風(fēng)原則就是形成低渦流或近似于單向氣流，風(fēng)速大于０．２米／秒，由較潔凈區(qū)吹向較不潔凈區(qū)，以防止氣流倒灌。
Exhaust principle is the formation of vortex flow or similar to the unidirectional air flow velocity is greater than 0.2 M / sec, by the relatively clean area blow to a clean area to prevent Backdraught airflow.
在應(yīng)用此種方式時(shí)，應(yīng)考慮到障礙物，熱源和污染物，排風(fēng)格柵位置等的影響。此項(xiàng)原則的特點(diǎn)就是低壓差，相對(duì)高的氣流風(fēng)速。運(yùn)用此項(xiàng)原則的實(shí)例就是位于較低潔凈度級(jí)別房間內(nèi)的層流潔凈區(qū)（單向氣流區(qū)）。
In the application of this method, the influence of the obstacle, heat source and pollutant, and the position of the wind grid should be considered. This principle is characterized by low pressure, relatively high airflow speed. Examples of the use of this principle is at a relatively low level of cleanliness in the room clean area (one-way flow area).
區(qū)域的物理分隔原則就是建立隔離裝置，對(duì)由較低潔凈度的房間產(chǎn)生的污染形成不可逾越的屏障，不致進(jìn)入較高潔凈度的潔凈室。
Area of physical separation principle is to establish isolation device, impassable for the formation of the pollution produced by the low cleanliness of the room the barrier, not into a high cleanliness of clean room.
如果是具有有害物的生產(chǎn)過(guò)程（個(gè)別品種的致病微生物，強(qiáng)烈反應(yīng)的化學(xué)制劑），則應(yīng)保證該處的氣壓相對(duì)于環(huán)境是負(fù)壓。
If there is a production process (individual species of pathogenic microorganisms, the strong reaction of the chemical agents), then should ensure that the pressure in the area is negative pressure.
應(yīng)予指出，建立負(fù)壓的要求是與潔凈室的工作原理相矛盾的，潔凈室是基于正壓差的。為了解決此項(xiàng)矛盾，便采用了另加的氣閘室，在潔凈室周?chē)⒌诙用荛]外殼（包括吊頂）使氣閘室相對(duì)于鄰近房間和有害作業(yè)具有高的正壓。
It should be pointed out that the requirement to establish negative pressure is in contradiction with the working principle of the clean room, clean room is based on the positive pressure difference. In order to solve this contradiction, adopt the plus the airlock, in clean room around the establishment of the second layer of the closed shell (including ceiling) the airlock relative to adjacent rooms and hazardous operation has high positive pressure.
為此，就可以采用隔離工藝，例如，在接觸有毒制劑時(shí)采用具有負(fù)壓得隔離裝置。
To this end, the separation process can be used, for example, the use of a negative pressure isolation device when exposed to toxic agents.
