现如今，无论是厂房车间、办公大楼还是其他建筑，通通都安装有通风管道。通风管道的作用是排风、除尘等，一般分为排风和局部排风。今天，就分别从排风和局部排风这两个方面来说说通风管道设计的依据。
Nowadays, ventilation pipes are installed in workshops, office buildings and other buildings. The function of ventilation duct is to exhaust air and dust, which is generally divided into comprehensive exhaust and local exhaust. Today, Tianjiao HVAC explains the basis of ventilation duct design from two aspects: overall ventilation and partial ventilation.
排风一般是在外墙上安装一定数量的排风扇，依靠排风使室内形成负压，通风管道设计时就考虑到将室外的新鲜空气通过门窗进入室内，使整个车间得到通风换气并使有害气体浓度冲淡到合乎卫生标准要求。从事通风管道安装的小编提醒大家，当数种溶剂的蒸气或数种刺激性气体同时散发于空气中时，其通风量应按各自分别稀释高容许浓度所需空气量的总和计算。
Full ventilation is usually installed on the external wall with a certain number of exhaust fans, which can form negative pressure in the room. When designing the ventilation duct, it is necessary to take into account the fresh air entering the room through doors and windows, so that the whole workshop can be ventilated and ventilated, and the concentration of harmful gases can be diluted to meet the requirements of health standards. The small edition of ventilation duct installation reminds us that when vapors of several solvents or several irritating gases are emitted into the air at the same time, the ventilation volume should be calculated according to the sum of the air volume needed to dilute to the maximum allowable concentration respectively.
局部排风通风管道设计时就考虑到有害气体、蒸气和粉尘在车间内散布，主要采用局部排风系统从发生源处直接排出室外。局部排风系统由局部排风罩、通风管道，通风机、粉尘或有害气体净化设备和排风装置等组成。当产生的有害气体、蒸气或粉尘的工件较大而不能在排风柜内进行加工时，可采用一面敞开，其余面密闭的侧方排风罩，或各方均不能密闭的侧方排风罩，或上部排风的伞形罩，有单侧排风、双侧排风和吹吸式槽边排风各种形式。
When designing local exhaust ventilation pipeline, harmful gases, vapors and dust are dispersed in the workshop. Local exhaust system is mainly used to directly discharge outdoors from the source. Local exhaust system consists of local exhaust hood, ventilation duct, ventilator, dust or harmful gas purification equipment and exhaust device. When the harmful gas, vapor or dust produced is too large to be processed in the exhaust cabinet, one side of the exhaust hood can be open, the other side of the exhaust hood can be closed, or the other side of the exhaust hood can not be closed, or the upper exhaust umbrella hood, there are various forms of unilateral exhaust, bilateral exhaust and Blow-Suction slot side exhaust.
For more information on the processing of ventilation pipes in Shandong, please click on our official website: http://www.jnqsg.com./
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