积尘：空气中的灰尘、颗粒物等会不断在通风管道内沉积，随着时间的推移，积尘量会逐渐增加。这不仅会影响通风效果，降低空气质量，还可能成为细菌、霉菌等微生物滋生的温床，对人体健康造成威胁。

Dust accumulation: Dust, particulate matter, etc. in the air will continuously deposit in the ventilation duct, and over time, the amount of dust accumulation will gradually increase. This not only affects ventilation effectiveness and reduces air quality, but may also become a breeding ground for bacteria, mold, and other microorganisms, posing a threat to human health.

滋生微生物：通风管道内相对潮湿且黑暗的环境适合微生物生长。长期积累的灰尘和适宜的温湿度条件会促使细菌、霉菌、病毒等微生物大量繁殖。这些微生物可能会随着通风气流传播到室内各个角落，引发呼吸道疾病、过敏反应等健康问题。

Microbial growth: The relatively humid and dark environment inside ventilation ducts is suitable for microbial growth. Long term accumulation of dust and suitable temperature and humidity conditions can promote the proliferation of bacteria, molds, viruses, and other microorganisms. These microorganisms may spread to various corners of the room with ventilation airflow, causing health problems such as respiratory diseases and allergic reactions.

腐蚀：如果通风管道所处环境存在腐蚀性气体、水汽或湿度较高，管道材质可能会发生腐蚀。尤其是金属材质的通风管道，容易生锈、穿孔，影响管道的结构强度和密封性，导致通风效率下降，甚至可能出现漏风现象。

Corrosion: If there are corrosive gases, water vapor, or high humidity in the environment where the ventilation duct is located, the material of the duct may corrode. Especially metal ventilation ducts are prone to rusting and perforation, which affects the structural strength and sealing of the ducts, leading to a decrease in ventilation efficiency and even the possibility of air leakage.

漏风：通风管道的连接部位可能会因长时间使用而出现松动、密封件老化等问题，从而导致漏风。此外，管道受到外力撞击、磨损或腐蚀穿孔也会造成漏风。漏风会使通风系统的能耗增加，影响通风效果，无法满足室内环境的通风需求。

Air leakage: The connection parts of ventilation ducts may become loose or the seals may age due to prolonged use, leading to air leakage. In addition, external impact, wear, corrosion, or perforation of pipelines can also cause air leakage. Air leakage can increase the energy consumption of the ventilation system, affect the ventilation effect, and fail to meet the ventilation needs of indoor environments.‘

堵塞：除了积尘外，通风管道内还可能会因异物进入、管道内的部件损坏脱落等原因造成堵塞。例如，在施工过程中不慎遗留的杂物、昆虫或小动物进入管道后死亡形成的堵塞等。堵塞会阻碍空气流通，使通风系统的阻力增大，风机负荷增加，甚至可能导致通风系统无法正常运行。

Blockage: In addition to dust accumulation, there may also be blockages in ventilation ducts due to foreign objects entering or components inside the ducts being damaged or detached. For example, blockages caused by debris, insects, or small animals that accidentally enter the pipeline during construction and die. Blockage can hinder air circulation, increase the resistance of the ventilation system, increase the load on the fan, and may even cause the ventilation system to malfunction.

保温性能下降：对于有保温层的通风管道，随着时间的推移，保温材料可能会老化、破损或受潮，导致保温性能降低。这会使通风管道表面出现结露现象，不仅浪费能源，还可能会损坏管道及周围的建筑结构，同时也会影响室内的舒适度。

Decreased insulation performance: For ventilation ducts with insulation layers, over time, the insulation material may age, break, or become damp, leading to a decrease in insulation performance. This will cause condensation on the surface of the ventilation duct, which not only wastes energy but may also damage the duct and surrounding building structures, while also affecting indoor comfort.

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