Advantages of fiber cloth duct and traditional iron duct

1) Convenience of construction 　　 galvanized iron sheet air duct is suitable for large-size processing and is convenient for mechanical processing. However, it is inconvenient to use mechanical equipment for small sizes, so the processing cycle is long and the speed is slow. In addition, it is difficult to control the installation accuracy during the construction of the galvanized iron sheet air duct; it is not easy to make accessories such as large and small pipes; the installation is difficult and requires high requirements for the construction personnel.　　The installation of fiber cloth air duct is simple and does not require special processing equipment, and the construction speed of fiber cloth air duct is fast, and the requirements for construction personnel are relatively low. Therefore, choosing fiber cloth air duct can save installation time to the greatest extent. (2) Energy-saving effect. The thermal conductivity of the fiber bag air duct is much lower than that of the galvanized iron sheet air duct, while the thermal conductivity of the galvanized iron sheet air duct (using 20mm rubber and plastic insulation material) is as high as 0.035-0.043W/(m? K), and when the insulating material of the galvanized iron sheet air duct is exposed to air for a long time, the phenomenon of moisture absorption will occur, which greatly increases the thermal conductivity of the galvanized iron sheet air duct.　　The fiber bag air duct does not require any thermal insulation materials, and the position of the ventilation openings is very flexible and accurately calculated, which can make the fan usage rate reach more than 90%, and the energy saving effect is the best.　　 (3) Fire performance 　　 Galvanized iron sheet is an inorganic material with good fire resistance and is non-combustible Class A. However, rubber and plastic insulation materials are often used on the outside. Greatly reduce the fire rating of the galvanized iron sheet air duct.　　The fiber cloth bag air pipe material has passed the authoritative inspection as a B1 permanent fire-retardant material, which greatly improves the fire safety performance. (4) The effect on the layer height The outside of the galvanized iron sheet air duct needs to be wrapped with an insulation layer on site, and it is often necessary to replace the insulation layer during maintenance. Therefore, in addition to the height of the air duct itself, a certain amount must be reserved. Installation and maintenance space.　　The fiber cloth bag air duct itself has the heat preservation effect, and can be installed close to the roof, no need to reserve installation space. The actual measurement shows that the use of fiber cloth bag air duct can save about 5~10cm higher than the galvanized iron sheet air duct. (5) Service life Galvanized iron sheet is easy to rust in a humid environment, while glass fiber, another insulation material commonly used in galvanized iron sheet ducts, tends to become brittle after moisture absorption, so the service life of galvanized iron sheet ducts is only about 5 to 10 years. . The service life of the fiber cloth duct is as long as 20 years. From this point of view, the fiber cloth air duct is far stronger than the galvanized iron sheet air duct. (6) Noise reduction performance The galvanized iron sheet air duct is a rigid air duct with no noise reduction effect. It will even transmit the noise of the equipment to the working place, so it is necessary to add a noise reduction cover and a noise reduction elbow. Sound accessories. In addition, when the galvanized iron sheet wind pipe suddenly encounters cold or hot air, due to thermal expansion and contraction, it will also produce stress and deformation, resulting in an unpleasant sound of 'quack and quack'. The fiber cloth duct itself is soft and has good noise reduction performance, so it is a very good tube muffler and does not require noise reduction treatment, which can reduce a lot of trouble. (7) Hygienic and healthy galvanized iron ducts are easy to rust, and are prone to cold bridges and condensation. Therefore, the galvanized iron ducts are very easy to breed bacteria, such as Legionella bacteria, which will cause secondary pollution to the air supply. . In addition, glass fiber, a commonly used insulation material for galvanized iron sheet air ducts, is also harmful to human health. The fiber cloth duct is not easy to produce condensed water when air is supplied, and the generation and spread of bacteria is well avoided. Therefore, from the perspective of hygiene and health, fiber cloth ducts are far better than galvanized iron ducts.　　From the above analysis, it can be known that fiber cloth air ducts are far stronger than galvanized iron sheet air ducts in other aspects. Therefore, fiber cloth air ducts should be promoted vigorously in the use of central air-conditioning air ducts.

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