通風管道出現(xiàn)的排煙不正常狀況的原因有哪些?

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1.主排氣管的通風面積不夠。

1. The ventilation area of the main exhaust pipe is not enough.

根據工程經驗，主管道風速不能超過15m/s，否則在運行一段時間后很容易使排煙系統(tǒng)通暢。在油煙凈化器的運行實踐中，大部分情況是由于排氣管通風面積不足所致，管道內氣體流量在15m/s以上。

According to engineering experience, the wind speed of the main pipeline shall not exceed 15m / s, otherwise it is easy to make the smoke exhaust system unobstructed after running for a period of time. In the operation practice of oil fume purifier, most cases are caused by insufficient ventilation area of exhaust pipe, and the gas flow in the pipe is more than 15m / s.

2.管道的橫截面面積變小

2. The cross-sectional area of the pipeline becomes smaller

由于需要通過建筑橫梁，管道的通風截面面積變小，截面上的阻力大，導致氣流不順暢。

Due to the need to pass through the building beam, the ventilation cross-section area of the pipeline becomes smaller and the resistance on the cross-section is large, resulting in unsmooth air flow.

3.使用排水管后集料的積聚

3. Aggregate accumulation after using drainage pipe

當排煙管通過建筑物橫梁或避開其他設備管道時，排煙管的某一部分將低于排煙管的整體水平。使用一段時間后，由于油水混合物將積聚在排氣管的下部，排煙將受到直接影響。

When the smoke exhaust pipe passes through the building beam or avoids other equipment pipes, a part of the smoke exhaust pipe will be lower than the overall level of the smoke exhaust pipe. After using for a period of time, the smoke exhaust will be directly affected because the oil-water mixture will accumulate in the lower part of the exhaust pipe.

4.低排煙不平坦

4. Low smoke exhaust is uneven

不同樓層的廚房煙氣通過同一主管道排出，廚房出口附近的廚房排煙效果較好，但下樓廚房的排煙不順暢。

The kitchen smoke of different floors is discharged through the same main pipe. The kitchen near the kitchen outlet has good smoke exhaust effect, but the smoke exhaust of the downstairs kitchen is not smooth.

5.建議安裝排煙風扇

5. It is recommended to install smoke exhaust fan

對于大排煙的廚房，還建議安裝排煙風扇。有三種排煙風扇：軸流風扇、空氣底盤和離心風扇。

For kitchens with large smoke exhaust, it is also recommended to install smoke exhaust fans. There are three types of smoke exhaust fans: axial fan, air chassis and centrifugal fan.

一般情況來講，通風管道在安裝過程當中提前設計好當前廚房的規(guī)劃，從而減少通風管道出現(xiàn)的排煙不正常狀況

Generally speaking, the current kitchen planning shall be designed in advance during the installation of the ventilation duct, so as to reduce the abnormal smoke exhaust of the ventilation duct