通風管道得安裝位置怎樣更合理？

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　　通風管道得安裝位置怎樣更合理？

　　How is the installation position of ventilation ducts more reasonable?

　　設置在高層建筑內的通風排煙管道設施，應具備以下要求：

　　Ventilation and smoke exhaust duct facilities installed in high-rise buildings should meet the following requirements:

　　（1）排煙口應設在頂棚上或靠近頂棚的墻面上，且與附近出口沿走道方向相鄰邊緣之間的水平距離不應小于1.50m。設在頂棚上的排煙口，距可燃構件或可燃物的距離不應小于1.00m。

　　(1) The smoke exhaust outlet should be located on the ceiling or on the wall near the ceiling, and the horizontal distance between it and the adjacent edge of the nearby safety exit along the aisle direction should not be less than 1.50m. The distance between the smoke exhaust outlet installed on the ceiling and combustible components or materials should not be less than 1.00m.

　　排煙口平時關閉，并應設置有手動和自動開啟裝置。

　　The smoke exhaust outlet should be closed normally and equipped with manual and automatic opening devices.

　　（2）防煙分區內的排煙口距遠點的水平距離不應超過30m。

　　(2) The horizontal distance between the smoke exhaust outlet in the smoke prevention zone and the farthest point should not exceed 30m.

　　在排煙支管上應設有當煙氣溫度超過280℃時能自行關閉的排煙防火閥。

　　A smoke exhaust fire damper that can close automatically when the smoke temperature exceeds 280 ℃ should be installed on the smoke exhaust branch.

　　（3）排煙風機可采用離心風機或采用排煙軸流風機，并應在其機房入口處設有當煙氣溫度超過280℃時能自動關閉的排煙防火閥。排煙風機應保證在280℃時能連續工作30min。

　　(3) The smoke exhaust fan can be a centrifugal fan or an axial flow smoke exhaust fan, and a smoke exhaust fire damper that can automatically close when the smoke temperature exceeds 280 ℃ should be installed at the entrance of the machine room. The smoke exhaust fan should be able to operate continuously for 30 minutes at 280 ℃.

　　（4）機械排煙系統中，當任一排煙口或排煙閥開啟時，排煙風機應能自行啟動。

　　(4) In a mechanical smoke exhaust system, when any smoke exhaust outlet or smoke exhaust valve is opened, the smoke exhaust fan should be able to start on its own.