Installation specifications and dimensions of central air-conditioning ventilation ducts, and calculation rules for ventilation duct engineering quantities? The following is a detailed explanation of the fabric air duct ventilation duct manufacturer! 1. Sheet steel air duct (1) The air duct is calculated according to the expanded area according to different specifications, and the area occupied by the inspection hole, measuring hole, air supply port, air suction port, etc. on the pipe is not deducted. (2) When calculating the length of the air duct, the length of the center line in the legend shall prevail, including the length of the pipe fittings such as elbow, tee, reducing pipe, and round place, but shall not include ventilation components (such as air valve, air outlet, etc.) The length of the location. Duct diameter and circumference are expanded according to legend dimensions. However, the interface and flange amount of the bite duct shall not be included in the expansion area. (3) The air duct guide vanes are calculated according to the area of u200bu200bthe vanes. (4) Air duct accessories (except for flexible joints, which are calculated by square meters), inspection holes, measuring holes, etc., are calculated in units of different types and specifications. 2. The calculation rules of the fabric air duct and the aluminum plate air duct are the same as the thin steel plate air duct, and the components are calculated according to the weight of the designed finished product. 3. Plastic air ducts and components (1) The air ducts are calculated based on the expanded area according to the different specifications of the legend, and the area occupied by the inspection holes, measuring holes, air supply ports, and air suction ports will not be deducted. (2) When calculating the length of the air duct, the length of the center line in the legend shall prevail, including the length of the pipe fittings such as elbow, tee, reducing pipe, and round place, but shall not include ventilation components (such as air valve, air outlet, etc. ) at the location, the diameter and perimeter of the duct are expanded with the dimensions of the legend. (3) Standard parts and non-standard parts are calculated according to the weight of the finished product. Calculation of guide vanes: The function of guide vanes is to press out the cold air that passes through the exchange from the air conditioning host, and discharge it from the tuyere along the air duct to achieve the purpose of adjusting the indoor air. When the cold air passes through the elbow of the air duct, if it is not diverted, eddy currents are bound to affect the conduction of the cold air! Therefore, guide vanes must be installed at the elbow of the air duct! There are often some young bobbins who ignore the calculation of the guide vane, or overestimate it is very inaccurate. 1. Select the number of guide vanes corresponding to the size of the long side of the air duct. 2. According to the size of the short side of the air duct, select the number of single piece of the corresponding guide vane × the number of guide vanes selected according to the size of the long side u003d the total area of u200bu200bthe guide vane of the air duct of this specification. It is stipulated in the acceptance specification that guide vanes should be installed when the plane width is greater than or equal to 500mm, then the engineering quantity of the guide vanes should be calculated in both cases.
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