First of all, it is very important to choose the installation location of the hood. Make sure the pipeline is as short as possible. Some owners will drag the water pipe quite long in order to be beautiful, so after turning off the lampblack machine, they will also put a lot of lampblack in the water pipe, and then pour it back indoors.

　　另外，為不破壞原有主二次煙道，其開啟方向不可隨意改變，必須擊中二次煙道內。業主不能根據自己的喜好隨意改變。但是，煙道內的孔可以擴大，但要注意不要損壞二次煙道的擋板。

　　In addition, in order not to destroy the original primary and secondary flue, the opening direction can not be changed at will, and must hit the secondary flue. Owners can not change at will according to their preferences. However, the holes in the flue can be enlarged, but care should be taken not to damage the baffle of the secondary flue.

　　山東飯店廚房排煙罩設計安裝不合理，經常會導致廚房排煙不暢通，直接影響油煙凈化器的使用，主要原因如下:

　　The unreasonable design and installation of kitchen smoke hood in Shandong Hotel often leads to the unobstructed exhaust of kitchen smoke, which directly affects the use of the lampblack purifier. The main reasons are as follows:

　　1. 主煙罩通風面積不足

　　1. insufficient ventilation area of main hood

　　快速排煙，防止廚房煙罩安裝異味

　　Quick smoke exhaust to prevent odor from kitchen hood installation

　　根據工程經驗，排煙總管風速不能超過15m/s，否則運行一段時間后排煙系統會被堵塞。在油煙凈化器的運行實踐中，大多數情況下是由于抽油煙機通風面積不足造成的，管道內氣體流量在15m/s以上。

　　According to the engineering experience, the air speed of the main exhaust pipe should not exceed 15 m/s, otherwise the exhaust system will be blocked after a period of operation. In the operation practice of lampblack purifier, most of the cases are caused by insufficient ventilation area of lampblack extractor, and the gas flow rate in the pipeline is more than 15 m/s.

　　2. 管道橫截面積變小

　　2. Reduction of cross-sectional area of pipeline

　　快速排煙，防止廚房煙罩安裝異味

　　Quick smoke exhaust to prevent odor from kitchen hood installation

　　由于排煙罩必須通過建筑梁，管道通風的截面面積變小，截面阻力增大，導致氣流受阻。

　　Because the exhaust hood must pass through the building beam, the cross-section area of the duct ventilation becomes smaller and the cross-section resistance increases, which results in the air flow obstruction.

　　三、使用后排水管道積存

　　3. Storage of drainage pipes after use

　　快速排煙，防止廚房煙罩安裝異味

　　Quick smoke exhaust to prevent odor from kitchen hood installation

　　當排煙罩穿過建筑梁或避開其他設備管道時，排煙罩的某一段將低于整個排煙罩平面。使用一段時間后，油水混合物會在煙機下部積聚，直接影響煙氣的順暢排出。

　　When the exhaust hood passes through the building beam or avoids other equipment pipelines, one section of the exhaust hood will be lower than the whole exhaust hood plane. After using for a period of time, oil-water mixture will accumulate in the lower part of the flue gas machine, directly affecting the smooth discharge of flue gas.