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The selection of ventilation pipe material also has a great impact on the construction quality of the pipe. Generally speaking, in order to ensure the weight of the pipeline, the pipeline with smaller plate thickness is required, but the size and pressure level of the pipeline need to be comprehensively considered. From a design point of view, it is worth noting that a system can have several pipe thicknesses corresponding to different static pressure levels at the same time. The transverse connection of air duct has certain stress. This connection method can be said to be a means to extend the length of the air duct, and also has the function of enhancing the rigidity and maintaining the transverse size of the air duct. Generally, the transverse connection method is angle steel flange connection. This connection mode depends on the wall thickness, the connection type and the plate wall reinforcement mode. The prefabricated air duct needs to be stored to avoid secondary pollution. The pipe orifice can be sealed with sealing materials such as plastic cloth, and then the air ducts can be stacked by categories. Before using the pipeline, please pay attention to the cleaning operation, confirm that the plate surface is free of corrosion, and do not clean it after drying.

通風管道

Ventilation duct

②油煙凈化器在炒菜時可按疾速抽風鈕，使油煙很多迅速地排出，而煮飯、燉菜時，按慢速抽風鈕就可以了。油煙凈化器運用一段時刻后，要注重缸杯的油大約有2/3時就可旋下，倒掉廢油再安上運用。若是不留神而溢出就會污染飯菜或爐面。

② When cooking, the fume purifier can press the fast exhaust button to discharge a lot of fume quickly. When cooking and stewing, just press the slow exhaust button. After using the fume purifier for a period of time, pay attention to that when about 2 / 3 of the oil in the cylinder cup can be unscrewed, the waste oil can be poured out and then installed for use. If it spills carelessly, it will pollute the food or stove surface.

③油煙凈化器運用半年上下，會發作抽油汽才能降低，那是葉輪油膩太多了，應停機，撥下插銷，將油煙凈化器的排風口松開即可卸下葉輪），用舊布擦洗后再用洗滌劑清潔潔凈，擦干后再裝上，擰緊螺絲，就可以持續運用了。

③ In the first and second half of the year when the oil fume purifier is used, the oil extraction steam can be reduced. That is, the impeller is too greasy. Stop the machine, remove the pin, loosen the air outlet of the oil fume purifier, and then remove the impeller). Scrub it with an old cloth, clean it with detergent, dry it, install it, tighten the screws, and it can be used continuously.

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