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?

通风管道翼角及弯管聚焦点禁止

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

①主要表现：矩形框通风管道两相对性平面图、两边面不平行面;折边不竖直;直线不相同;压槽关不紧。

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：会使通风管道联接承受力不匀称，设备后的通风管道不竖直，法兰片密封垫不严实，管理体系透风，产生空调负载损害，而且减少使用期。

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.

济南市通风管道

Jinan ventilation duct

③缘故：板下料施工放样禁止确;通风管道两组平行面，相对性面的板材长短和总宽不相同。

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：开启下料时，解决板材严苛角方，对一片板材的长短、总宽及其检查直线，使他们的误差操纵在同意范畴内;下料后的板材，应将通风管道相对性面的两块板材重叠检查规格性。因为厨房所属房屋建筑的布局及其厨房在房屋建筑中部位不一样，有标准的厨房应由房屋建筑的集中空调系统软件开展井然有序排风。

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.

但现阶段所碰到的绝大多数状况是房屋建筑沒有设定厨房的排风系统软件。很多带饭店、厨房等的房屋建筑，仅设计方案了集中化供暖系统而无集中空调系统软件。当厨房处在运行状态时，通风系统资金投入运作，厨房内处在负压力情况，新风系统来源于包含户外新风系统渗入和饭店的气体很多补入厨房。

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.