With the passage of time, people's requirements for cleaning ventilation pipes and saving equipment and materials have gradually increased; With the progress of science and technology, people have higher and higher requirements for the quality of HVAC engineering. Many existing stainless steel air ducts and spiral circular air ducts are used to meet the functional requirements of ventilation, air conditioning and dust removal transportation.

通風管道

Ventilation duct

這就需要在現有技術上不斷進步，在裝備規劃、開發和制造方面采取更加經濟、健康和可持續的發展戰略。目前空調通風工程中使用的金屬風管主要有圓形風管和不銹鋼風管。圓形風管強度高，耗材少，但加工工藝雜亂，占用空間大；不銹鋼風管易于組織和加工，應用廣泛。也有用機器制造的。螺旋形狀由鋼帶、圓帶和矩形帶制成。為了節省空間，很多不銹鋼風管都是用扁圓做成的。

This requires continuous progress in existing technology and a more economic, healthy and sustainable development strategy in equipment planning, development and manufacturing. At present, the metal air ducts used in air conditioning and ventilation projects mainly include circular air ducts and stainless steel air ducts. The circular air duct has high strength and less consumables, but the processing technology is messy and takes up a large space; Stainless steel air duct is easy to organize and process and is widely used. It can also be made by machines. The spiral shape is made of steel strip, round belt and rectangular belt. In order to save space, many stainless steel air ducts are made of flat circles.

通風管道制造加工，尤其是一些小企業、手工作坊式企業，這些企業是撐不下去的。因為我們相信一個企業的發展離不開企業文化和戰略的發展。主風道雖然仍采用鐵板制作，但由于、使用壽命、防潮、隔音、承重等原因，在施工和防護方面存在諸多缺陷。這導致市場需要新產品來改掉這個問題。新型不銹鋼風管的出現剛剛適應了購物廣場的需求。經過多次應用和工程實踐，投資者逐漸接受。

Ventilation duct manufacturing and processing, especially some small enterprises and manual workshop enterprises, these enterprises can not sustain. Because we believe that the development of an enterprise is inseparable from the development of corporate culture and brand strategy. Although the main air duct is still made of iron plate, there are many defects in construction and protection due to environmental protection, service life, moisture-proof, sound insulation, load-bearing and other reasons. This leads to the need for new products to overcome this problem. The emergence of new stainless steel air ducts has just adapted to the needs of shopping malls. After many applications and engineering practice, investors gradually accept it.

風管一般分為三類：鍍鋅不銹鋼風管、不銹鋼風管、復合不銹鋼風管。同時，不銹鋼風管質量好，適用性強，但昂貴。目前，使用廣泛的不銹鋼風管是鍍鋅鋼管。鍍鋅不銹鋼風管基本上是不銹鋼風管的特點，但其比不銹鋼風管低三分之二甚更低。不銹鋼復合風管一般用于外部環境比較一般，對風管要求不太高的地方。由于鐵皮簡單，在各種環境中都會發生化學反應，導致腐蝕和生銹。然而，鋅在干燥空氣中幾乎不變化。在潮濕空氣中，鋅表面會形成良好的堿性碳酸鋅膜。不銹鋼風管主要是在風管的鐵皮上涂上一層鋅，起到保護鐵皮的作用。一旦鍍鋅層鈍化、染色或涂上光刻膠，其保護和裝飾性能就會得到顯著改變。

Air ducts in shopping malls are generally divided into three categories: galvanized stainless steel air ducts, stainless steel air ducts and composite stainless steel air ducts. At the same time, the stainless steel air duct has good quality and strong applicability, but the price is expensive. At present, the widely used stainless steel air duct in shopping malls is galvanized steel pipe. Galvanized stainless steel air duct is basically the characteristic of stainless steel air duct, but its price is two-thirds or even lower than that of stainless steel air duct. Stainless steel composite air duct is generally used in places with general external environment and low requirements for air duct. Because the iron sheet is simple, chemical reactions will occur in various environments, resulting in corrosion and rust. However, zinc hardly changes in dry air. In humid air, a good alkaline zinc carbonate film will be formed on the zinc surface. Stainless steel air duct is mainly coated with a layer of zinc on the iron sheet of the air duct to protect the iron sheet. Once the zinc coating is passivated, dyed or coated with photoresist, its protective and decorative properties will be significantly changed.

通風管道的耐用性較差。氯化鎂與氧化鎂的摩爾比是有科學依據的。氯化鎂含量應根據氧化鎂中鎂含量的測定來確定。然而，不合格產品的制造商并不知道氧化鎂的鎂含量的測定，更不用說合理的摩爾比值。只知道氧化鎂和鹽水會在氣管中凝固。風管殘留氯離子含量高，在潮濕空氣環境中易返鹵，使用壽命短。

The durability of ventilation ducts is poor. The molar ratio of magnesium chloride to magnesium oxide has a scientific basis. The content of magnesium chloride shall be determined according to the determination of magnesium content in magnesium oxide. However, manufacturers of unqualified products do not know the determination of magnesium content of magnesium oxide, let alone a reasonable molar ratio. All I know is that magnesium oxide and salt water solidify in the trachea. The residual chloride ion content of air duct is high, which is easy to return halogen in humid air environment and has short service life.