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空气净化工程无尘车间的气流要注意些什么?
来源: http://www.bairbrepaws.com 浏览: 发布日期: 2021-01-21
1.送入的洁净气流能尽快均匀分布或扩散到整个洁净区,以冲淡室内污染源散发的尘和菌对空气的污染,维持生产环境所要求的洁净度。
1. The clean air flow can be evenly distributed or spread to the whole clean area as soon as possible, so as to dilute the air pollution caused by the dust and bacteria emitted by indoor pollution sources and maintain the cleanliness required by the production environment.
2.能快捷地把污染源散发到无尘车间的尘和菌从室内排走,避免或减少涡流和死角,缩短尘、菌在室内滞留时间,以减小与产品接触的几率。
2. It can quickly discharge the dust and bacteria from the pollution source to the dust-free workshop, avoid or reduce the eddy current and dead angle, shorten the residence time of dust and bacteria in the room, and reduce the probability of contacting with products.
3.兼顾室内温、湿度均匀性等空调送风的要求及工作人员的舒适要求。 由于与一般空调房间的主要任务不同,所以气流组织的方案也必然有所差异。
3. Take into account the indoor temperature, humidity uniformity and other air conditioning requirements and the comfort requirements of the staff. As the main task of air-conditioned room is different from that of general air-conditioned room, the scheme of air distribution must be different.
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对于舒适性空调房间和普通温、湿度精度的生产车间,考虑其空调气流组织方案的基点是采用尽可能大的送风温差,以便减小送风量,使系统设备、管道都更小,初投资和运行费用更低。所以通常夏季采用机器露点送风。
For comfortable air-conditioned rooms and production workshops with ordinary temperature and humidity accuracy, the basic point to consider the air distribution scheme of air-conditioning is to adopt the maximum air supply temperature difference, so as to reduce the air supply volume, make the system equipment and pipes smaller, and lower the initial investment and operating costs. Therefore, the dew point air supply is usually used in summer.
因为送入空气与室温温差大,为避免室内生活区、工作区温度不均匀或有吹冷风、吹热风的不舒适感,所以无论是采用侧送风口或是顶送散流器,都要求其出风有较强的紊流系数,具有一定的引射能力,以利于吸收了室内热湿负荷的空气被卷吸及掺混到送风气流中,使送风气流的温、湿度尽快地接近于室内设计温、湿度。
Because the temperature difference between the incoming air and the room temperature is large, in order to avoid the indoor living area and working area uneven temperature or the uncomfortable feeling of blowing cold air and hot air, whether the side air supply outlet or the top air supply diffuser is used, it is required that its air outlet has a strong turbulence coefficient and a certain injection capacity, so as to facilitate the air absorbing indoor heat and moisture load to be entrained and mixed into the air supply airflow To make the temperature and humidity of the air supply close to the indoor design temperature and humidity as soon as possible.
当送风气流以回流的状态进入生活区、工作区时,其温、湿度从工艺要求来看,已进入控制精度范围;从人的感受来说也是柔和和可接受的。普通空调房间侧送侧回、送风形成贴附射流就是空调房间典型的气流组织方案。
When the supply air flow enters the living area and working area in the state of backflow, its temperature and humidity have entered the control precision range from the perspective of process requirements, and it is soft and acceptable from the perspective of human feelings. The typical air distribution scheme of air-conditioned room is the attached jet formed by side supply, side return and air supply.
空调房间气流组织的特点是除了普通存在送风卷吸面上升的气流外,还有很多的涡流。这种上升气流与尘、菌受重力作用向下运动的方向相逆,尘、菌将随气流扬起,一些颗粒较大的尘粒将明显滞后于气流,在室内滞留时间将更长。涡流也助长了尘、菌在室内的回旋,而不是快捷地随气流从室内离去。这都是与洁净空气流组织的原则不同所致。
The characteristics of air distribution in air-conditioned rooms are that there are many vortices in addition to the air flow rising on the suction surface of the supply air. The updraft is opposite to the downward movement direction of dust and bacteria under the action of gravity. Dust and bacteria will rise with the airflow. Some larger dust particles will lag behind the airflow and stay longer indoors. The vortex also encourages the dust and bacteria to whirl in the room, rather than leaving the room quickly with the air flow. This is different from the principle of clean air flow organization.
无尘车间的气流流型无尘车间的气流组织或气流形态主要分为两类。一类是非单向流,以往称之为常规流型或乱流流型;另一类是单向流,以往习惯称之为层流流型。 往往无尘车间内不同区域有不同的洁净度要求,因此常常将前两类流型组合在一起。要求高的部位采用单向流,室内其他地方采用非单向流。
The air flow pattern of dust-free workshop the air distribution or air flow pattern of dust-free workshop can be divided into two categories. One is non unidirectional flow, which used to be called conventional flow pattern or turbulent flow pattern; the other is unidirectional flow, which used to be called laminar flow pattern. Often different areas in the dust-free workshop have different cleanliness requirements, so the first two types of flow patterns are often combined together. One way flow is used in high demand parts and non one way flow is used in other indoor places.
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