想要實現通風管道的全面通風，就可以利用機械通風，也可以利用自然通風來實現。按系統持征不同，全面通風可分為全面送風，全面排風和全面送、排風三類。按作用機理不同，全面通風可分為稀釋通風和置換通風兩類。那么通風管道有哪些機械通風原則呢？
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、稀釋通風
1. Dilution ventilation
稀釋通風又稱混合通風，即送人比室內污染物濃度低的空氣與室內空氣混合，以此降低室內污染物的濃度，達到衛生標難。
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、置換通風
2. Displacement ventilation
在置換通風系統中，新鮮冷空氣由房間底部以很低的速度送入，送風溫差僅為2—4Y。送入的新鮮空氣因密度大而像水一樣彌漫整個房間的底部，熱源引起的熱對流氣流使室內產生垂直的溫度禪度，氣流緩慢上升，脫離工作區，將余熱和污染物推向房間頂部，由設在頂棚上或房間頂部的排風口直接排出。
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.
室內空氣近似活塞狀流動，使污染物隨空氣流動從房間頂部排出，工作區基本處于送入空氣中，即工作區污染物濃度約等于送人空氣的濃度，這是置換通風與傳統的稀釋全面通風的區別。在通風管道中，顯然置換通風的通風效果比稀釋通風要好。
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、局部通風
3. Local ventilation
局部通風就是利用局部氣流，使局部地點不受有害物的污染，造成良好的空氣環境。
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.
局部通風系統分為局部送風和局部排風兩大類。局部排風是將污染物就地捕集、凈化后排放至室外。局部送風是將經過處理的、合乎要求的空氣送到局部工作地點，以保證局部區域的空氣條件。局部通風方式作為保證工作和生活環境空氣品質、防止室內環境污染的技術措施應優先考慮。
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.
通風管道
Ventilation duct
以上這些就是高氏通風管道為大家介紹的通風管道的機械通風原則，了解機械通風原則對我們今后安裝通風管道工程有很大的幫助的，還能夠保證通風管道的工程質量，如果您還有不明白的地方，可以隨時向我們咨詢。
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.
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