In installation calculation, there is a professional HVAC, in which the ventilation system is a very important link. Use ventilation system to explain operation method and precautions.
Firstly, there are two methods to calculate the installation of ventilation system, one is the drawing method, the other is the transformation method. This time it is aimed at the application of transformation mode.
Ventilation specialty mainly considers some accessories such as tuyeres, ducts, valves, air equipment, etc.
This paper mainly emphasizes the matters needing attention in the operation of air duct and air valve of ventilation system.
Firstly, the identification of airway
Before the pipeline transformation, one thing must be clear, that is, the pipeline elevation. When viewed with the height adjustment command, the results sometimes differ. This is because the elevation of the pipeline is the central elevation of the pipeline. If you're making a catheter, you'll do it a little differently. For example, the bottom of the pipe, or the center, or the top. Therefore, before using the air duct, it is necessary to see whether the air duct on the drawing is top flushed, bottom flushed or center flushed, and adjust the bottom elevation, center elevation and top elevation accordingly. (In addition, the corresponding ducts should also be used in the modification of ducts.
Now we need to do a good job in air duct renovation. In this step, we need to input the following aspects: firstly, the material of the duct; secondly, the wall thickness of the duct; thirdly, the type of duct interface; fourthly, the insulation thickness of the duct. A better way is to look at these parameters better. If not, please refer to the relevant provisions of 05n4-3.
Drawing of valve and matters needing attention
For the air valve can be converted or drawn directly, this method can refer to the conversion equipment. The contents of the air valve mentioned here are quite special. In the main pipeline, the valve does not deduct the length of the pipeline, but in the duct, the duct valve is deducted the length of the duct, for different types of duct valves, there are different deduction methods. As shown in the following figure, no matter how wide the duct is, the tightening of the valve is fixed; what is the value of the width of some ducts, the length of the duct is fixed and the height (or radius) of the duct is fixed; in another case, the width of the duct corresponds to the length of the valve. We can choose different types of valves according to specific requirements.