在安裝算量中，有一個項目為暖通，其中通風(fēng)系統(tǒng)是其中很重要的一環(huán)。以通風(fēng)系統(tǒng)說一下操作的方法及注意事項。
In the installation calculation, there is a project for HVAC, in which ventilation system is a very important part. With the ventilation system to say the operation method and precautions.
首先通風(fēng)系統(tǒng)在安裝算量中有兩種作法，一種是描圖方式，一種是轉(zhuǎn)化方式。這次針對性說一下轉(zhuǎn)化方式的應(yīng)用。
First of all, there are two methods in installation calculation of ventilation system, one is drawing mode, the other is conversion mode. This time, we will talk about the application of transformation mode.
本文主要強調(diào)通風(fēng)系統(tǒng)中風(fēng)管和風(fēng)閥操作注意事項：
This paper mainly emphasizes the precautions for the operation of air duct and air valve in ventilation system
一、風(fēng)管的識別
1、 Identification of air duct
對于風(fēng)管的轉(zhuǎn)化之前，有一個內(nèi)容必須要先明確，那就是關(guān)于風(fēng)管的標(biāo)高。用高度調(diào)整命令查看時，有時顯示出來的結(jié)果不一樣。那是因為，管線和管道的標(biāo)高就是線或管的標(biāo)高，平時再說管道多高時，就是把管道看成一根線。而如果做風(fēng)管，那在表示標(biāo)高時，方法就有些不同。要說風(fēng)管管底標(biāo)高，還是標(biāo)高，還是頂標(biāo)高。所以在風(fēng)管之前，要看清圖紙上的風(fēng)管將來是上平齊，還是下平齊，還是齊，那相對應(yīng)的調(diào)整管底標(biāo)高，標(biāo)高和頂標(biāo)高。（此外，在做風(fēng)管轉(zhuǎn)化時，也要針對性的要使用對應(yīng)的一種）。
Before the conversion of duct, there is a content that must be clear first, that is, the elevation of duct. When viewing with the height adjustment command, sometimes the results displayed are different. That is because the elevation of the pipeline and the pipeline is the elevation of the center of the line or pipe. When we talk about the height of the pipeline, we regard the pipeline as a line. However, if the air duct is used, the method for representing the elevation is somewhat different. The bottom elevation, the center elevation and the top elevation of the duct should be mentioned. Therefore, before the air duct, it is necessary to see whether the air duct on the drawing will be flush at the top, at the bottom, or at the bottom, or on the center, and adjust the bottom elevation, center elevation and top elevation of the duct accordingly. (in addition, when doing duct conversion, we should also use the corresponding one).
那現(xiàn)在要做好風(fēng)管轉(zhuǎn)化，這一步要輸入好以下方面：一是風(fēng)管的材質(zhì)，二是風(fēng)管的壁厚，三是風(fēng)管的接口型式，四是風(fēng)管的保溫厚度。這些參數(shù)更好看一下說明，如果沒有的話參考05N4-3的相關(guān)規(guī)定。
Now to do a good job in the conversion of air duct, the following aspects should be input: first, the material of the air duct; second, the wall thickness of the air duct; third, the interface type of the air duct; fourth, the insulation thickness of the air duct. It is better to read the description of these parameters, if not, refer to the relevant provisions of 05n4-3.
二、風(fēng)閥的繪制及注意事項
2、 Drawing of air valve and matters needing attention
關(guān)于風(fēng)閥可以用轉(zhuǎn)化，也可以直接繪制，方法可以參考轉(zhuǎn)化設(shè)備。這里說一下風(fēng)閥中比較特殊的內(nèi)容。在管道里面，閥門是不扣減管道長度的，但在風(fēng)管里面，風(fēng)閥是要扣減掉風(fēng)管的長度的，對于不同的風(fēng)閥類型，有不同的扣減方法。如下圖所示,有的是風(fēng)管寬度不論什么值，風(fēng)閥只扣一個固定值；有的是風(fēng)管寬度論什么值，風(fēng)閥長度扣固定加上風(fēng)管的高度（或半徑）；還有一種情況，風(fēng)管的寬度與風(fēng)閥的長度有一個對應(yīng)關(guān)系。我們可以根據(jù)具體的說明來選擇不同的風(fēng)閥類別。
The air valve can be converted or drawn directly. The method can refer to the conversion equipment. Here is a special part of the air valve. In the pipeline specialty, the valve does not deduct the length of the pipe, but in the air pipe, the air valve should deduct the length of the air pipe. There are different deduction methods for different types of air valve. As shown in the figure below, in some cases, no matter what the width of the air duct is, the air valve is only fixed with a fixed value; in some cases, the length of the air valve is fixed plus the height (or radius) 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 select different types of air valves according to the specific instructions.
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