想要实现通风管道的全面通风，就可以利用机械通风，也可以利用自然通风来实现。按系统持征不同，全面通风可分为全面送风，全面排风和全面送、排风三类。按作用机理不同，全面通风可分为稀释通风和置换通风两类。那么通风管道有哪些机械通风原则呢？
If you want to realize the comprehensive ventilation of ventilation duct, you can use mechanical ventilation or natural ventilation. According to the different characteristics of the system, the comprehensive ventilation can be divided into three types: comprehensive air supply, comprehensive exhaust and comprehensive air supply and exhaust. According to different action mechanism, general ventilation can be divided into dilution ventilation and displacement ventilation. So what are the mechanical ventilation principles for ventilation ducts?
1、稀释通风
1. Dilution ventilation
稀释通风又称混合通风，即送人比室内污染物浓度低的空气与室内空气混合，以此降低室内污染物的浓度，达到卫生标难。
Dilution ventilation, also known as mixed ventilation, is to send air with lower concentration than indoor pollutants to mix with indoor air, so as to reduce the concentration of indoor pollutants and meet the health standards.
2、置换通风
2. Displacement ventilation
在置换通风系统中，新鲜冷空气由房间底部以很低的速度送入，送风温差仅为2—4Y。送入的新鲜空气因密度大而像水一样弥漫整个房间的底部，热源引起的热对流气流使室内产生垂直的温度禅度，气流缓慢上升，脱离工作区，将余热和污染物推向房间顶部，由设在顶棚上或房间顶部的排风口直接排出。
In the displacement ventilation system, fresh cold air is fed from the bottom of the room at a very low speed, and the temperature difference of the air supply is only 2-4y. Because of the high density of the fresh air, it permeates the bottom of the room like water. The heat convection air flow caused by the heat source makes the room produce a vertical temperature Zen degree. The air flow rises slowly and leaves the working area. The waste heat and pollutants are pushed to the top of the room. Finally, it is directly discharged by the air outlet set on the ceiling or the top of the room.
室内空气近似活塞状流动，使污染物随空气流动从房间顶部排出，工作区基本处于送入空气中，即工作区污染物浓度约等于送人空气的浓度，这是置换通风与传统的稀释全面通风的区别。在通风管道中，显然置换通风的通风效果比稀释通风要好。
The indoor air flows like a piston, so that pollutants are discharged from the top of the room along with the air flow. The working area is basically in the incoming air, that is, the concentration of pollutants in the working area is approximately equal to the concentration of the air sent to the room. This is the biggest difference between displacement ventilation and traditional dilution ventilation. It is obvious that displacement ventilation is better than dilution ventilation in ventilation duct.
3、局部通风
3. Local ventilation
局部通风就是利用局部气流，使局部地点不受有害物的污染，造成良好的空气环境。
Local ventilation is the use of local air flow, so that local sites are not polluted by harmful substances, resulting in a good air environment.
局部通风系统分为局部送风和局部排风两大类。局部排风是将污染物就地捕集、净化后排放至室外。局部送风是将经过处理的、合乎要求的空气送到局部工作地点，以保证局部区域的空气条件。局部通风方式作为保证工作和生活环境空气品质、防止室内环境污染的技术措施应优先考虑。
Local ventilation system can be divided into local air supply and local exhaust. Local exhaust is to collect and purify pollutants on the spot and then discharge them to the outdoor. Local air supply is to send the treated and qualified air to the local working place to ensure the air condition in the local area. As a technical measure to ensure the air quality of working and living environment and prevent indoor environmental pollution, local ventilation should be given priority.
通风管道
Ventilation duct
以上这些就是高氏通风管道为大家介绍的通风管道的机械通风原则，了解机械通风原则对我们今后安装通风管道工程有很大的帮助的，还能够保证通风管道的工程质量，如果您还有不明白的地方，可以随时向我们咨询。
These are the mechanical ventilation principles of the ventilation duct introduced by Gao's ventilation duct. Understanding the mechanical ventilation principle will be of great help to our future installation of ventilation duct engineering, and can also ensure the engineering quality of the ventilation duct. If you have any questions, you can consult us at any time. 上一篇：济南酒店厨房排烟罩设计安装方法
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