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Gas is a necessity in our daily life. Without gas, we will feel that room breathing and CO2 in the air are also the basic elements to maintain our daily life. Therefore, we should always maintain natural ventilation and consider our requirements for CO2, which is also the harm of ventilation pipe production and processing to our daily life, But what product quality problems are involved in the production of ventilation pipes in Jinan?

通風管道翼角及彎管聚焦點禁止

It is forbidden to focus on the wing angle and elbow of ventilation pipe

①主要表現：矩形框通風管道兩相對性平面圖、兩邊面不平行面;折邊不豎直;直線不相同;壓槽關不緊。

① Main manifestations: two relative plans of rectangular frame ventilation duct, two uneven surfaces on both sides; The hem is not vertical; The straight lines are different; The pressure groove cannot be closed tightly.

②危害：會使通風管道聯接承受力不勻稱，設備后的通風管道不豎直，法蘭片密封墊不嚴實，管理體系透風，產生空調負載損害，而且減少使用期。

② Harm: it will cause uneven bearing force of ventilation pipe connection, non vertical ventilation pipe behind the equipment, loose flange gasket, ventilation of management system, air conditioning load damage and reduce service life.

濟南市通風管道

Jinan ventilation duct

③緣故：板下料施工放樣禁止確;通風管道兩組平行面，相對性面的板材長短和總寬不相同。

③ Reason: it is forbidden to confirm the setting out of slab blanking construction; The length and total width of two groups of parallel surfaces and relative surfaces of ventilation duct are different.

④方法：開啟下料時，解決板材嚴苛角方，對一片板材的長短、總寬及其檢查直線，使他們的誤差操縱在同意范疇內;下料后的板材，應將通風管道相對性面的兩塊板材重疊檢查規格性。因為廚房所屬房屋建筑的布局及其廚房在房屋建筑中部位不一樣，有標準的廚房應由房屋建筑的集中空調系統軟件開展井然有序排風。

④ Methods: when starting blanking, solve the strict angle square of the plate, and check the length, total width and straight line of a plate to make their error control within the agreed range; For the plates after blanking, the two plates on the opposite surface of the ventilation pipe shall be overlapped to check the specification. Because the layout of the building to which the kitchen belongs and the position of the kitchen in the building are different, the standard kitchen should be discharged orderly by the central air conditioning system software of the building.

但現階段所碰到的絕大多數狀況是房屋建筑沒有設定廚房的排風系統軟件。很多帶飯店、廚房等的房屋建筑，僅設計方案了集中化供暖系統而無集中空調系統軟件。當廚房處在運行狀態時，通風系統資金投入運作，廚房內處在負壓力情況，新風系統來源于包含戶外新風系統滲入和飯店的氣體很多補入廚房。

However, the vast majority of the situation encountered at this stage is that there is no kitchen exhaust system software in the building. Many buildings with restaurants and kitchens only design centralized heating system without centralized air conditioning system software. When the kitchen is in operation, the ventilation system is put into operation, and the kitchen is under negative pressure. The fresh air system comes from the infiltration of outdoor fresh air system and a lot of gas from the hotel.