In the installation calculation, there is a professional HVAC, in which the ventilation system is a very important link. Explain the operation method and precautions of ventilation system.

　　首先，通风系统的安装计算有两种方法，一种是跟踪法，另一种是变换法。这一次，我将讨论转换的应用。

　　First of all, there are two methods to calculate the installation of ventilation system, one is tracking method, the other is transformation method. This time, I will discuss the application of transformation.

　　通风主要考虑风口、风管、阀门、风机设备及一些附件。

　　The ventilation specialty mainly considers the air outlet, air duct, valve, fan equipment and some accessories.

　　本文主要强调通风系统中风管、风门操作注意事项:

　　This paper mainly focuses on the precautions for the operation of the wind pipe and the air door of the ventilation system

　　一、风道识别

　　1、 Air duct identification

　　对于风管的改造，首先要有一个内容要明确，那就是关于风管的标高。当使用高度调整命令查看时，结果有时会不同。这是因为管道的标高和管道是管道或管道的标高。当我们谈论管道有多高时，我们把管道当做一条线。如果你画一个导管，你会有不同的表示海拔的方法。底层，中间层，顶层。因此，在风管安装前，要看图纸上的风管顶部是平的，底部是平的，还是是平的，并相应地调整风管底部、和顶部的标高。(另外，在风管转换时，也要有针对性地使用相应的风管)。

　　For the renovation of air duct, first of all, there should be a clear content, that is, the elevation of air duct. When you use the height adjustment command to view, the results are sometimes different. This is because the elevation of the pipe and the elevation of the center of the pipe or pipe. When we talk about how high the pipe is, we think of the pipe as a line. If you draw a catheter, you will have different ways to represent the altitude. Bottom, middle, top. Therefore, before installing the air duct, it is necessary to see whether the top of the air duct is flat, the bottom is flat or the center is flat on the drawing, and adjust the elevation of the bottom, center and top of the air duct accordingly. (in addition, when the duct is converted, the corresponding duct should also be used specifically.).

　　现在做风管的变换,这一步应该输入以下方面:个是风管的材料,第二个是风管道的壁厚,第三是风管道的接口类型,第四是风管的保温厚度。这些参数更好的描述，如果不是，请参考05n4-3的相关规定。

　　Now, for the transformation of air duct, the following aspects should be input: the first is the material of air duct, the second is the wall thickness of air duct, the third is the interface type of air duct, and the fourth is the insulation thickness of air duct. The best description of these parameters, if not, please refer to the relevant provisions of 05n4-3.

　　二、风阀的图纸及注意事项

　　2、 Drawing and precautions of air valve

　　关于风阀可以进行改造，也可以直接绘制，方法可以参考改造设备。这说明了顺风阀的一些特别之处。在管道行业中，阀门不是扣除管道长度，而是在风管中，风管阀门是扣除风管长度，对于不同类型的风管阀门，有不同的扣除方法。如下图所示，有足够的风管宽度，无论什么值，风阀只有扣一个固定值;有足够的风管宽度就什么值，气阀扣的长度固定加风管高度(或半径);还有一种情况是管道的宽度与阀门的长度有对应关系。我们可以根据具体说明选择不同类型的风阀。

　　The air valve can be modified or drawn directly. The method can refer to the modified equipment. This shows some special features of the downwind valve. In the pipeline industry, the valve does not deduct the pipe length, but in the air pipe, the air pipe valve deducts the air pipe length. For different types of air pipe valves, there are different deduction methods. As shown in the figure below, there is enough duct width. No matter what value, there is only one fixed value for the air valve. If there is enough duct width, the length of the air valve buckle is fixed plus the duct height (or radius). There is also a corresponding relationship between the width of the duct and the length of the valve. We can choose different types of air valves according to the specific instructions.