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　　With the development of economy and the improvement of people's living standard, it is very convenient to eat out now. People with different tastes can find a restaurant that suits their tastes. Now there are many catering companies, each restaurant must have a kitchen that can cook and a kitchen to cook, but due to the influence of exhaust ventilation pipe and its length and raw materials.

　　在操作過程中可能會產生很多噪音，這會影響周圍的環境，并會受到周圍環境的影響。居民投訴。那么，這種噪聲攻擊的原因是什么呢，遮光罩單元不牢固。如果方向不平整，螺釘松動并且零件掉落，則會在支架上形成共鳴聲。

　　During operation, there may be a lot of noise, which will affect the surrounding environment and will be affected by the surrounding environment. Complaints from residents. So, what is the cause of this noise attack? The hood unit is not firm. If the direction is not smooth, the screw is loose and the part falls, it will form a resonance sound on the bracket.

　　此時，有必要重新安裝抽油煙機或部件。必須估計位置以確保設備的正確性，止回閥裝置不正確。例如，如果止回閥失效或掉落，則排煙效果不好。煙灰在管道中，止回閥發生共振或氣流受到干擾，容易產生噪音。

　　At this time, it is necessary to reinstall the range hood or components. The position must be estimated to ensure the correctness of the equipment, and the check valve device is not correct. For example, if the check valve fails or falls, the smoke exhaust effect is not good. When the soot is in the pipeline, the check valve resonates or the air flow is disturbed, which is easy to generate noise.

　　這時，應重新安裝止回閥或用新的止動閥代替閥，轉子葉片變形，并且設備不正確。由于長期使用，風輪上附著了大量的機油，導致不平衡，并且葉片的部分破損可能會引起噪音。此時，應定期清潔抽油煙機，必要時應更換風輪。

　　At this time, the check valve should be reinstalled or replaced by a new check valve, the rotor blade is deformed, and the equipment is not correct. Due to long-term use, a large amount of oil is attached to the wind turbine, resulting in imbalance, and part of the blade damage may cause noise. At this time, the range hood shall be cleaned regularly and the fan wheel shall be replaced if necessary.