通風管道主要應用在工業及建筑工程中，應用領域主要涉及：電子工業無塵廠房凈化系統，醫藥食品無菌車間凈化系統，酒店賓館、商場醫院、工廠及寫字樓的空調系統，工業污染控制用除塵、排煙、吸油等排風管、工業環境或崗位用送風管、煤礦抽放瓦斯用抽放瓦斯系統、煤礦礦井環境控制用送回風系統等等;
Ventilation ducts are mainly used in industrial and construction projects. The application fields mainly involve: dust-free workshop purification system in electronic industry, sterile workshop purification system in medicine and food, air conditioning system in hotels, shopping malls, hospitals, factories and office buildings, exhaust pipes for dust removal, smoke exhaust and oil absorption for industrial pollution control, air supply pipes for industrial environment or posts Gas drainage system for coal mine gas drainage, air supply and return system for coal mine environmental control, etc;
通風管道是利用自然界空氣(稱新鮮空氣或新風)來置換室內空氣，以提高室內空氣質量。那么，它是如何提高室內空氣質量的呢?
Ventilation duct uses natural air (called fresh air or fresh air) to replace indoor air to improve indoor air quality. So, how does it improve indoor air quality?
(1) 提供人呼吸所需要的氧氣;
(1) Provide oxygen for human breathing;
(2) 稀釋室內污染物或氣味;
(2) Dilute indoor pollutants or odors;
(3) 派出室內工藝過程產生的污染物;
(3) Pollutants produced by indoor process;
(4) 除去室內多余的熱量或濕量(以下簡稱余熱和余濕);
(4) Remove the excess heat or moisture in the room (hereinafter referred to as waste heat and residual moisture);
(5) 提供室內燃燒設備燃燒所需要的空氣。
(5) Provide air required for combustion of indoor combustion equipment.
通風管道的截面有三種形狀，下面由*人員介紹一下：
The cross section of the ventilation duct has three shapes, which are introduced by * personnel below:
1、圓形的，圓形管道一般是直接裝的管子，標注時要標清其直徑;
1. Circular pipes are generally directly installed pipes, and their diameters shall be marked clearly when marking;
2、矩形的，矩形的通風管道一般是建筑施工時砌成的，標注時標清長和寬;
2. Rectangular, rectangular ventilation pipes are generally built during construction, and the length and width shall be marked clearly when marking;
3、外觀是矩形的，里面內切圓，這種管道是裝好管子后后期外粉成的，標注時也只需標清長和寬。
3. The appearance is rectangular and the inside is inscribed round. This kind of pipe is made of external powder after the pipe is installed. When marking, only the length and width need to be marked.
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