The performance of fiber fabric air duct is much stronger than that of galvanized iron sheet air duct
Time: 2020-02-11 Preview times：1623
Due to the various problems and constants caused by the use of traditional iron sheet air ducts, central air conditioners have begun to use fiber fabric air ducts in large spaces. This combination will not only achieve the purpose of environmental protection and energy saving, but also make the central air conditioner more effective. Limit play. Let's talk about the difference between the two air duct systems in use, and what are the differences in performance?
(1) Convenience of construction
Galvanized iron sheet air duct is suitable for large-size processing and is convenient for machining. 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; it is difficult to install and requires high requirements for the construction personnel.
The installation of fiber fabric air duct is simple and does not require special processing equipment, and the construction speed of fiber fabric air duct is fast, and the requirements for construction personnel are relatively low. Therefore, the choice of fiber fabric air duct can greatly save installation time.
(2) Energy saving effect
The thermal conductivity of fiber fabric air duct is much lower than that of galvanized iron sheet, while the thermal conductivity of galvanized iron sheet (using 20mm rubber and plastic insulation material) is as high as 0.035-0.043W/(mK). When the thermal insulation material of the air duct is exposed to air for a long time, it will also absorb moisture, which greatly increases the thermal conductivity of the galvanized iron sheet air duct.
The fiber fabric air duct does not require any thermal insulation materials, and the position of the ventilation opening is very flexible and accurately calculated, which can make the fan usage rate reach more than 90%, and the energy saving effect is good.
(3) Fire performance
Galvanized iron sheet is an inorganic material with good fire resistance and is non-combustible Class A, but its exterior often uses rubber and plastic insulation materials. Greatly reduce the fire rating of the galvanized iron sheet air duct.
The fiber fabric wind pipe material has passed the authoritative inspection as a B1 permanent fire-proof and flame-retardant material, and the fire safety performance is greatly improved.
(4) Impact on floor height
The exterior of the galvanized iron sheet air duct needs to be wrapped with an insulation layer on site, and the insulation layer is often replaced during maintenance. Therefore, in addition to the height of the air duct itself, a certain amount of installation and maintenance space needs to be reserved.
The fiber fabric air duct itself has the effect of heat preservation and can be installed close to the roof without reserving installation space. Actual measurement shows that the use of fiber fabric 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 for galvanized iron sheet ducts, becomes brittle after moisture absorption. Therefore, the service life of galvanized iron sheet ducts is only about 5 to 10 years. The service life of fiber fabric air duct is as long as 20 years. From this point of view, the fiber fabric 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 silencing effect. It can even transmit the noise of the equipment to the work place, so it is necessary to add silencing hoods and silencing elbows. In addition, when the galvanized iron sheet wind pipe suddenly encounters cold or hot wind, due to thermal expansion and contraction, it will also produce stress and deformation, resulting in an unpleasant sound of "quack and quack". The fiber fabric air duct itself is soft and has good silencing performance, so it is a very good tube muffler, and no silencing treatment is required, which can reduce a lot of trouble.
(7) Hygiene and health
The galvanized iron sheet air duct is easy to rust, and is prone to cold bridges and condensation. Therefore, the galvanized iron sheet air duct is 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 ducts, is also harmful to human health. The fiber fabric air duct is not easy to produce condensed water when air is supplied, and the generation and spread of bacteria are well avoided. Therefore, from the perspective of hygiene and health, fiber fabric air duct is far better than galvanized iron sheet air duct.
From the above analysis, it is concluded that the performance and use of fiber fabric air ducts under actual application conditions are far stronger than galvanized iron sheet air ducts. Therefore, combining fiber fabric air ducts in the use of central air conditioning ducts can make breakthroughs. The various limitations and inconveniences of traditional air ducts are worthy of our application and promotion in various industries.