对于餐饮业的厨房来说，排烟是否通畅直接关系到厨房能否正常工作，油烟净化则只是厨房排烟系统中的一个净化空气的强制性功能。排烟系统和净化器的合理匹配是保证油烟净化器净化效率的关键，同时也是油烟净化器设计人员容易忽略的问题，如果排烟系统设计不合理而造成整个厨房排烟不畅，则将无法安装油烟净化器，即使安装了油烟净化器也无法正常工作。
For the kitchen in the catering industry, the smoothness of smoke exhaust is directly related to the normal operation of the kitchen, while the oil fume purification is only a mandatory function of purifying air in the kitchen smoke exhaust system. The reasonable matching of the smoke exhaust system and the purifier is the key to ensure the purification efficiency of the oil fume purifier, and it is also a problem that the oil fume purifier designers are easy to ignore. If the smoke exhaust system is not designed properly and the smoke exhaust in the whole kitchen is not smooth, the oil fume purifier will not be installed, even if the oil fume purifier is installed, it will not work normally.
由于在GB18483-2001中没有给出关于油烟排风收集系统与净化器匹配的计算依据，因而在实际进行油烟排风系统和净化器的设缺乏可靠实用的计算方法。掌握排烟系统的各部分特性及其对厨房整体排烟的影响，是进行油烟净化器选型和安装的前提，对于保证油烟净化器的正常工作具有非常重要的意义。
Because there is no calculation basis for matching the oil fume exhaust collection system with the purifier in GB18483-2001, there is no reliable and practical calculation method in the actual design of the oil fume exhaust system and the purifier. Mastering the characteristics of each part of the smoke exhaust system and its impact on the overall smoke exhaust of the kitchen is the prerequisite for the selection and installation of the oil smoke purifier, and is of great significance to ensure the normal operation of the oil smoke purifier.\
厨房的排烟系统主要由集烟罩、排烟管道、油烟净化器、排烟风机（含*）和厨房整体补风装置构成
The smoke exhaust system of the kitchen is mainly composed of smoke hood, smoke exhaust pipe, oil fume purifier, smoke exhaust fan (including *) and the overall air supply device of the kitchen
油烟净化器的类型和运行方式可以根据实际情况进行选择。在油烟净化器安装之前，要对排烟系统中各部分的实际运行参数，包括运行阻力和排风量进行核算。如果是新建项目，在设要充分考虑安装了油烟净化器后对排风系统的影响；如果是改造项目，在加装油烟净化器时需要对排风系统重新进行核算，必要时要对集烟罩、排烟管道和厨房整体补风装置进行改造并更换排烟风机。
The type and operation mode of oil fume purifier can be selected according to the actual situation. Before installing the oil fume purifier, the actual operation parameters of each part of the smoke exhaust system, including the operation resistance and exhaust air volume, should be calculated first. If it is a new project, the impact on the exhaust system after installing the oil fume purifier should be fully considered in the design; If it is a reconstruction project, the exhaust system needs to be re-accounted when installing the oil fume purifier. If necessary, the smoke hood, smoke exhaust pipe and the overall air supply device of the kitchen should be reconstructed and the smoke exhaust fan should be replaced.
由于厨房所在建筑物的格局以及厨房在建筑物中位置不同，有条件的厨房应由建筑物的集中空调系统进行有序送风。但目前所遇到的大部分情况是建筑物没有设置厨房的送风系统。许多带餐厅、厨房等的建筑物，仅设计了集中采暖系统而无集中空调系统。当厨房处于工作状态时，排风系统投入运行，厨房内处于负压状态，新风来源包括室外新风渗透和餐厅的空气大量补入厨房。
Due to the different layout of the building where the kitchen is located and the different location of the kitchen in the building, the conditional kitchen should be orderly ventilated by the central air-conditioning system of the building. However, most of the situations encountered at present are that the building does not have a kitchen air supply system. Many buildings with restaurants and kitchens have only designed central heating systems without central air-conditioning systems. When the kitchen is in the working state, the exhaust system is put into operation, and the kitchen is in the negative pressure state. The sources of fresh air include outdoor fresh air infiltration and a large amount of air from the restaurant is replenished into the kitchen.
3.1无序送风
3.1 Disordered air supply
无序送风会造成厨房的工作环境恶劣。特别是在夏季，虽然餐厅内通常会安装一些局部柜式空调机以降低餐厅的室内温度，但室内空气补入厨房，并不能厨房的热负荷并降低厨房温度。由于厨房油烟较大，如果在厨房内设局部柜式空调机以降低厨房内的温度，柜式空调机的回风过滤则应定期清理。
Disordered air supply will cause poor working environment in the kitchen. Especially in summer, although some local cabinet air conditioners are usually installed in the dining room to reduce the indoor temperature of the dining room, the supplement of indoor air into the kitchen cannot eliminate the heat load of the kitchen and reduce the temperature of the kitchen. Due to the large cooking fume in the kitchen, if a local cabinet air conditioner is installed in the kitchen to reduce the temperature in the kitchen, the return air filter of the cabinet air conditioner should be cleaned regularly.
3.2有序送风
3.2 Ordered air supply
对于设置集中空调系统的建筑来说，厨房的工作环境能够保证，其补风多为有序送风，灵活性也较大，在目前厨房的通风系统中，多为以下三种补风方式：
For buildings with centralized air conditioning system, the working environment of the kitchen can be guaranteed, and its air supply is mostly orderly and flexible. In the current kitchen ventilation system, there are mainly the following three air supply modes:
（1）餐厅空调为全新风直流式空调系统，空调新风送入餐厅，然后流入厨房经排风系统排出室外。此种方式投资较少，餐厅内采暖通风效果好。不足之处是大量空调风会被直接排出，新风能耗大，不利于。
(1) The dining room air conditioner is a fresh air direct-current air conditioning system. The fresh air from the air conditioner is first sent into the dining room, and then flows into the kitchen and is discharged out of the room through the exhaust system. This method has less investment and good heating and ventilation effect in the restaurant. The disadvantage is that a large amount of air-conditioning air will be directly discharged, and the fresh air consumption is large, which is not conducive to energy conservation.
（2）将组合式空调机组的新风一部分直接补入厨房，一部分送入餐厅，并通过回风机回到空调机。这样可以部分解决新风能耗大的问题，同时使用的灵活性也较大。可在厨房设置测压装置，当厨房排风机全部工作时，负压增大，则回风电动阀关闭，回风机停，餐厅送风大量补入厨房；当少部分排风机开启或排风机不工作时，负压不是很大，则回风电动阀打开，回风机启动，避免空调送风全部被排出。
(2) A part of the fresh air from the combined air conditioning unit is directly fed into the kitchen, and a part is fed into the dining room, and returned to the air conditioner through the return fan. This can partly solve the problem of high energy consumption of fresh air, and at the same time, it has greater flexibility in use. A pressure measuring device can be set in the kitchen. When the kitchen exhaust fans are all working and the negative pressure increases, the electric return air valve will be closed, the return air fan will stop, and the restaurant will supply a large amount of air into the kitchen; When a small number of exhaust fans are turned on or the exhaust fan is not working, and the negative pressure is not very large, the electric return air valve will be opened, and the return air fan will be started to prevent all the air supply from being discharged.
（3）用两台机组分别为餐厅、厨房服务，其中厨房为全新风直流系统，直接补充厨房炉灶的排风，而餐厅为一次回风全新空气系统，这个方案能保证餐厅和厨房的空调效果，而且厨房和餐厅系统互不干扰，缺点是初投资较大。
(3) Two units are used to serve the dining room and kitchen respectively. The kitchen is a fresh air direct current system, which directly supplements the exhaust of the kitchen stove, while the dining room is a fresh air system with primary return air. This scheme can ensure the air conditioning effect of the dining room and kitchen, and the kitchen and dining room systems do not interfere with each other. The disadvantage is that the initial investment is large.
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