在安裝計算中，有一個是暖通空調，其中通風系統是非常重要的一部分。
In installation calculations, one major is HVAC, where ventilation systems are a very important part.
通風系統的安裝計算有兩種方法，一種是追蹤法，一種是變換法。
There are two methods for installing and calculating ventilation systems, one is the tracking method and the other is the transformation method.
通風主要考慮風口、風道、風閥、空氣設備和一些附件。下面通風管道廠家介紹通風系統中風管和風閥操作的注意事項：
Ventilation mainly considers air vents, ducts, dampers, air equipment, and some accessories. The following ventilation duct manufacturers will focus on the precautions for operating the ventilation system's air ducts and valves:
一、風管的標識
1、 Identification of air ducts
風管改造前，有一點必須先明確，就是風管的標高。使用高度調整命令查看時，有時顯示的結果會有所不同。那是因為管線和管道的標高是一條線或管道的標高，而當我們談到管道有多高時，我們就把管道看成一條線。如果制作風管，在表示立面時方法會有所不同。要說風管的底標高，或標高，或頂標高。所以在風管之前，一定要看清楚圖紙上的風管是未來平齊、未來平齊還是中間平齊，然后相應調整底標高、標高、頂標高。
Before the renovation of the air duct, it is necessary to clarify the elevation of the air duct. When using the height adjustment command to view, sometimes the displayed results may differ. That's because the elevation of pipelines and pipelines is the center elevation of a line or pipeline, and when we talk about how high the pipeline is, we consider the pipeline as a line. If air ducts are made, the method of representing the facade may vary. When it comes to the bottom elevation, center elevation, or top elevation of the air duct. So before installing the air duct, it is important to check whether the air duct on the drawing is future flush, future flush, or center flush, and then adjust the bottom elevation, center elevation, and top elevation accordingly.
現在，我們需要做好管道改造。在這一步，我們需要輸入以下幾個方面：一，風管的材質，二，風管的壁厚，三，風管的接頭類型，第四，風管的保溫厚度。
Now, we need to do a good job in pipeline renovation. In this step, we need to input the following aspects: first, the material of the air duct, second, the wall thickness of the air duct, third, the joint type of the air duct, and fourth, the insulation thickness of the air duct.
二、空氣閥圖紙及注意事項
2、 Air valve drawings and precautions
氣閥可直接轉換或繪制，方法可參考轉換設備。這里有一些關于空氣閥的特別之處。在管道，閥門是不扣除管道長度的，但是在風管中，風閥是扣除風管長度的，不同類型的風閥有不同的扣除方法。如下圖所示，風道寬度有的是，不管什么值，只從風閥中扣除一個固定值；有的是風管寬度的數值，風閥長度與風管高度固定；在另一種情況下，空氣導管的寬度和空氣閥的長度之間存在對應關系。我們可以根據具體說明選擇不同類型的氣閥。
The air valve can be directly converted or drawn, and the method can refer to the conversion equipment. Here are some special things about air valves. In the pipeline profession, valves do not deduct the length of the pipeline, but in the air duct, air valves deduct the length of the air duct, and different types of air valves have different deduction methods. As shown in the figure below, there are some air duct widths, and no matter what value, only a fixed value is deducted from the air valve; Some are numerical values for the width of the air duct, with the length of the air valve fixed to the height of the air duct; In another case, there is a corresponding relationship between the width of the air duct and the length of the air valve. We can choose different types of air valves based on specific instructions.
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