在实际用用中，排烟罩的种类有很多，在这里给大家简单的介绍几种
In the actual use, there are many kinds of smoke hood, here to give you a brief introduction of several
密闭罩
Airtight cover
污染源全部密闭在罩内，其优点排风量小，可有效控制有害物，不受环境的影响，但影响操作，主要用于控制要求高的场合，消除危害比较的的气体或烟尘。在食品厂或中央厨房的自动化生产线上应用较多。自动连续电炸锅，自动连续烘焙设备都是在这种烟罩里面工作。
The pollution sources are all sealed in the hood, which has the advantages of small exhaust volume, can effectively control harmful substances, and is not affected by the environment, but affects the operation. It is mainly used in the occasions with high control requirements, and to eliminate the harmful gas or smoke. It is widely used in automatic production line of food factory or central kitchen. Automatic continuous electric fryer and automatic continuous baking equipment all work in this kind of hood.
柜式排烟罩
Cabinet type smoke hood
柜式排烟罩有一面敞开用于人工操作，其他面均密封，敞开面保持一定的吸风速度，以保证柜内有害物不逸出，主要应用与实验室。
One side of the cabinet type smoke hood is open for manual operation, the other side is sealed, and the open side maintains a certain suction speed to ensure that harmful substances in the Cabinet do not escape. It is mainly used in the laboratory.
外部吸气罩
capturing hood
外部吸气罩位于烟气源附近，靠近烟口的抽吸作用将烟气吸入烟罩内。对生产操作影响小，安装维护方便，但增加了对周围空气的吸入，排风量大，效率低，控制有害物能力较差，主要用于因工艺要求或操作条件有限不能将污染物密闭的场合。
The external suction hood is located near the smoke source, and the smoke is sucked into the hood by the suction effect near the smoke port. It has little influence on production and operation, convenient installation and maintenance, but increases the inhalation of surrounding air, with large exhaust volume, low efficiency and poor ability to control harmful substances. It is mainly used in the occasions where the pollutants cannot be sealed due to the limited process requirements or operating conditions.