专注通风管道加工·排烟罩

1) local ventilation

利用局部的送、排风控制室内局部地区的污染物的传播或控制局部地区的污染物的传播或控制局部地区的污染物浓度达到卫生标准要求的通风叫做局部通风。局部通风又分为局部排风和局部送风。

Ventilation is called local ventilation by using local air supply and exhaust air to control the spread of pollutants in local areas or to control the spread of pollutants in local areas or to control the concentration of pollutants in local areas to meet the requirements of health standards. Local ventilation is also divided into local exhaust and partial air supply.

①局部排风

Local exhaust air

局部排风是在集中所产生有害物的局部地点，设置有害物捕集装置，将有害物质就地排走，以控制有害物质向室内扩散。局部排风系统如图2-2所示。

Local air exhaust is a local place where harmful substances are produced in a centralized way, and a harmful collection device is set up to remove harmful substances in place to control the diffusion of harmful substances into the room. The local exhaust system is shown in Figure 2-2.

②局部送风

Local air supply

局部送风方式是利用通风机和风管，直接将室外新鲜空气或者经过处理后具有一定参数的空气送到工作地点。炼钢、锈造等高温车间经常采用这种通风方式。

The local air supply mode is to directly send outdoor fresh air or air with certain parameters to the working place by fan and air duct. This way of ventilation is often used in high temperature workshop such as steelmaking and rust making.

2） 通风

2) comprehensive ventilation

通风是对整个房间进行通风换气。通风包括排风，送风和送、排风。

Ventilation is the ventilation of the whole room. Comprehensive ventilation includes comprehensive exhaust, full air supply and full delivery and exhaust.

①排风

Overall exhaust ventilation

排风是从整个房间排除有害物质的通风方式，为了使室内产生的有害物尽可能不扩散到其它区域或领室去，可以在有害物比较集中产生的区域或房间采用机械排风。图2-4位机械排风系统，图2-4（a）是在墙上装有轴流风机的简单排风系统。

Comprehensive ventilation is the ventilation method of eliminating harmful substances from the whole room. In order to make the harmful substances produced indoors do not spread to other areas or leading rooms as far as possible, a comprehensive mechanical exhaust air can be adopted in the areas or rooms that are produced in a relatively concentrated area. Figure 2-4, a comprehensive mechanical exhaust system. Figure 2-4 (a) is the simplest comprehensive exhaust system equipped with axial fans on the wall.

②送风

Overall air supply

把符合卫生要求的空气送到整个房间各个部位的送风系统称为送风。可以通过自然通风和机械通风来实现。机械送风系统如图2-5所示，经过处理后的空气，在风机的作用下，经风管、送风口送入整个房间的各个部位，而排风可通过排风口或门窗排出。

The air supply system that accords with the hygienic requirements to the whole room is called the full air supply. It can be achieved through natural ventilation and mechanical ventilation. The overall mechanical air supply system, as shown in Figure 2-5, shows that the treated air is sent to all parts of the whole room by the wind pipe and air outlet under the action of the fan, and the exhaust air can be discharged through the exhaust vent or door and window.

③送、排风

Overall delivery and exhaust

在门窗紧闭，自然排风或进风比较困难的房间，常采用图2-4所示排风和图2-5所示的送风相结合的送、排风系统。

In a room with closed doors and windows, a room with a natural exhaust or a difficult entry, a comprehensive air supply and exhaust system combined with the overall air supply shown in Figure 2-5 is often used in Figure 2-4.