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　　通風管道是山東各類建筑中空氣流通的重要通道，長期使用后，管道內部會積累灰塵、油污甚至滋生微生物，不僅影響通風效率，還可能對室內空氣質量造成影響。尤其山東氣候四季分明，冬季供暖期管道內易凝結水汽，加速污垢堆積，因此掌握科學的清理方法十分必要。

　　Ventilation ducts are important channels for air circulation in various buildings in Shandong. After long-term use, dust, oil stains, and even microorganisms may accumulate inside the ducts, which not only affects ventilation efficiency but may also have an impact on indoor air quality. Especially in Shandong, the climate has distinct four seasons, and during the winter heating season, water vapor is prone to condense in the pipes, accelerating the accumulation of dirt. Therefore, it is necessary to master scientific cleaning methods.

　　清理前的準備工作不可或缺。首先需關閉通風系統電源，確保操作安全。然后根據管道的安裝位置和規格，準備合適的工具，如長度可調節的管道刷、高壓吹風機、吸塵器、內窺鏡等。對于吊頂內或墻體中的隱蔽管道，可通過檢修口進入，利用內窺鏡觀察內部污垢分布情況，確定清理重點區域。同時，在管道出風口和回風口處鋪設防塵布，防止清理過程中灰塵擴散到室內環境。若管道內油污較多（如餐飲場所的通風管道），還需準備中性清潔劑和熱水，避免使用腐蝕性強的化學藥劑損傷管道材質。

　　Preparation before cleaning is essential. Firstly, it is necessary to turn off the power supply of the ventilation system to ensure safe operation. Then, according to the installation position and specifications of the pipeline, prepare suitable tools such as adjustable length pipeline brushes, high-pressure blowers, vacuum cleaners, endoscopes, etc. For concealed pipes inside the ceiling or walls, they can be accessed through inspection ports and the distribution of internal dirt can be observed using an endoscope to determine the key areas for cleaning. At the same time, dust-proof cloth should be laid at the outlet and return outlet of the pipeline to prevent dust from spreading into the indoor environment during the cleaning process. If there is a lot of oil pollution in the pipeline (such as ventilation ducts in restaurants), neutral cleaning agents and hot water should be prepared to avoid using highly corrosive chemicals that can damage the pipeline material.

　　針對不同污垢類型，需采用對應的清理方式。對于干燥的灰塵和顆粒物，可先用高壓吹風機從管道一端向另一端吹掃，將浮塵集中到預設的收集口，再用吸塵器將灰塵徹底吸除。對于管道內壁附著的頑固塵垢，可使用帶有軟毛刷的延長桿進行反復擦拭，注意動作輕柔，避免毛刷脫落堵塞管道。若管道內存在油污，需先用稀釋后的中性清潔劑噴灑在油污處，靜置 10-15 分鐘使其軟化，再用沾有熱水的抹布擦拭，最后用清水沖洗干凈，并用干布吸干水分，防止殘留水分在管道內滋生霉菌。

　　Corresponding cleaning methods should be adopted for different types of dirt. For dry dust and particulate matter, you can first use a high-pressure blower to blow from one end of the pipeline to the other, collect the floating dust at the preset collection port, and then use a vacuum cleaner to thoroughly remove the dust. For stubborn dirt adhered to the inner wall of the pipeline, an extension rod with a soft bristled brush can be used for repeated wiping, paying attention to gentle movement to avoid the brush falling off and blocking the pipeline. If there is oil contamination in the pipeline, it is necessary to first spray diluted neutral cleaner on the oil contaminated area, let it sit for 10-15 minutes to soften it, then wipe it with a cloth dipped in hot water, and finally rinse it with clean water and absorb the water with a dry cloth to prevent residual water from breeding mold in the pipeline.

　　對于較長的通風管道，可采用分段清理的方式。先將管道按長度劃分成若干段，每段之間用擋板隔離，避免清理時污垢擴散到其他區域。從距離出風口最近的一段開始，逐步向深處推進，確保每段管道都清理徹底。彎道和接頭處是污垢容易堆積的部位，需用專用的彎道刷反復清理，確保無死角。清理過程中，可通過內窺鏡實時檢查清理效果，直至管道內壁無明顯污垢附著。

　　For longer ventilation ducts, segmented cleaning can be used. First, divide the pipeline into several sections according to length, and isolate each section with a baffle to prevent dirt from spreading to other areas during cleaning. Starting from the section closest to the air outlet, gradually push deeper to ensure that each section of the pipeline is thoroughly cleaned. Curves and joints are areas where dirt is prone to accumulate, and they need to be cleaned repeatedly with a specialized curve brush to ensure no dead corners. During the cleaning process, the cleaning effect can be checked in real time through an endoscope until there is no obvious dirt adhering to the inner wall of the pipeline.

　　清理后的維護措施能延長管道潔凈周期。清理完成后，需檢查管道連接處的密封性，更換老化的密封墊，防止外界灰塵再次進入。對于餐飲場所等油污產生較多的環境，建議在通風口安裝濾網，并定期清洗或更換濾網，減少油污進入管道的量。在山東潮濕的夏季，可適當增加通風系統的運行時間，降低管道內濕度，抑制微生物滋生。此外，建議每年至少進行一次全面清理，在冬季供暖前和夏季多雨期前各進行一次簡易檢查，及時處理輕微的污垢堆積。

　　The maintenance measures after cleaning can extend the pipeline cleaning cycle. After cleaning, it is necessary to check the sealing of the pipeline connection and replace the aging sealing gasket to prevent external dust from entering again. For environments with high levels of oil pollution, such as dining establishments, it is recommended to install filters at ventilation openings and regularly clean or replace them to reduce the amount of oil entering pipelines. In the humid summer of Shandong, the operation time of the ventilation system can be appropriately increased to reduce the humidity inside the pipeline and inhibit the growth of microorganisms. In addition, it is recommended to conduct a comprehensive cleaning at least once a year, with a simple inspection before winter heating and before the rainy season in summer, to promptly deal with minor dirt accumulation.

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