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　　In installation calculation, there is a special system for HVAC, and ventilation system is an important part of HVAC. Let me talk about the operation method and precautions of the ventilation system.

　　首先，通風(fēng)系統(tǒng)在安裝計(jì)算中有兩種方法，一種是繪圖法，另一種是轉(zhuǎn)換法。 這次，談?wù)勣D(zhuǎn)換方法的應(yīng)用。

　　Firstly, there are two methods in installation calculation of ventilation system, one is drawing method, the other is conversion method. This time, talk about the application of conversion methods.

　　通風(fēng)考慮因素主要包括風(fēng)口，風(fēng)道，風(fēng)門，風(fēng)力設(shè)備和一些配件。

　　The major considerations of ventilation include air outlets, air ducts, air doors, wind power equipment and some accessories.

　　這次主要強(qiáng)調(diào)通風(fēng)系統(tǒng)中風(fēng)管和風(fēng)門的操作注意事項(xiàng)：

　　Emphasis is placed on the operation of air ducts and air doors in the ventilation system.

　　一，風(fēng)管的識(shí)別

　　1. Identification of air ducts

　　在轉(zhuǎn)換管道之前，必須有明確的內(nèi)容，即管道的高度。 使用高度調(diào)整命令查看時(shí)，有時(shí)顯示的結(jié)果會(huì)有所不同。 那是因?yàn)楣艿篮凸艿赖臉?biāo)高是管道或管道的中心標(biāo)高。 當(dāng)管道很高時(shí)，它就是管道。 如果使用風(fēng)管，則指示高程時(shí)方法會(huì)有所不同。 據(jù)說管道的底部是高程，或者是中心高程，或者是高海拔。 因此，在導(dǎo)風(fēng)管之前，有必要查看圖紙上的導(dǎo)風(fēng)管是否平齊或中心齊平，并相應(yīng)調(diào)整管的底部高度，中心高度和頂部高度。  （此外，在進(jìn)行風(fēng)管轉(zhuǎn)換時(shí)，還必須使用相應(yīng)的風(fēng)管）。

　　Before switching the pipeline, there must be a clear content, that is, the height of the pipeline. When viewed with the height adjustment command, sometimes the results will be different. That's because the elevation of pipes and pipes is the central elevation of pipes or pipes. When the pipe is very high, it is the pipe. If air duct is used, the method of indicating elevation will be different. It is said that the bottom of the pipeline is the elevation, or the central elevation, or the highest elevation. Therefore, before the duct, it is necessary to check whether the duct on the drawing is even or the center is even, and adjust the bottom height, the center height and the top height of the duct accordingly. (In addition, the corresponding duct must be used when the duct conversion is carried out).

　　現(xiàn)在有必要做好風(fēng)管轉(zhuǎn)換。 此步驟應(yīng)輸入以下方面：一個(gè)是管道的材料，另一個(gè)是管道的壁厚，第三個(gè)是管道的界面類型，第四個(gè)是管道的絕緣厚度。 好查看這些參數(shù)的說明，否則請(qǐng)參見05N4-3的相關(guān)規(guī)定。

　　Now it is necessary to do a good job of air duct conversion. This step should input the following aspects: one is the material of the pipe, the other is the wall thickness of the pipe, the third is the interface type of the pipe, and the fourth is the insulation thickness of the pipe. It is better to see the description of these parameters, otherwise please refer to the relevant provisions of 05N4-3.

　　二，風(fēng)閥的起草及注意事項(xiàng)

　　2. Drafting of air valves and matters needing attention

　　關(guān)于阻尼器，它可以轉(zhuǎn)換或直接繪制。 該方法可以參考轉(zhuǎn)換設(shè)備。 這里談?wù)勶L(fēng)門的特殊內(nèi)容。 在管道行業(yè)中，閥門并沒有扣除管道的長(zhǎng)度，但是在管道中，阻尼器就是要減少管道的長(zhǎng)度。 對(duì)于不同類型的阻尼器，有不同的推導(dǎo)方法。 如下圖所示，某些風(fēng)管寬度無論是什么值，風(fēng)門僅屈曲一個(gè)固定值； 一些是風(fēng)道寬度，風(fēng)門的長(zhǎng)度是固定的，風(fēng)道的高度（或半徑）的值； 管道的寬度與風(fēng)門的長(zhǎng)度相對(duì)應(yīng)。 我們可以根據(jù)具體說明選擇不同的風(fēng)門類別。

　　With respect to dampers, they can be converted or drawn directly. This method can refer to the conversion equipment. Here we talk about the special content of the damper. In the pipeline industry, the valve does not deduct the length of the pipeline, but in the pipeline, the damper is to reduce the length of the pipeline. There are different deduction methods for different types of dampers. As shown in the figure below, some duct widths, no matter what, buckle only a fixed value; some are duct widths, the length of the duct is fixed, the height (or radius) of the duct; the width of the duct corresponds to the length of the duct. We can choose different types of throttle according to the specific instructions.