1) local ventilation

利用局部的送、排風(fēng)控制室內(nèi)局部地區(qū)的污染物的傳播或控制局部地區(qū)的污染物的傳播或控制局部地區(qū)的污染物濃度達(dá)到衛(wèi)生標(biāo)準(zhǔn)要求的通風(fēng)叫做局部通風(fēng)。局部通風(fēng)又分為局部排風(fēng)和局部送風(fēng)。

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局部排風(fēng)

Local exhaust air

局部排風(fēng)是在集中所產(chǎn)生有害物的局部地點(diǎn)，設(shè)置有害物捕集裝置，將有害物質(zhì)就地排走，以控制有害物質(zhì)向室內(nèi)擴(kuò)散。局部排風(fēng)系統(tǒng)如圖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局部送風(fēng)

Local air supply

局部送風(fēng)方式是利用通風(fēng)機(jī)和風(fēng)管，直接將室外新鮮空氣或者經(jīng)過處理后具有一定參數(shù)的空氣送到工作地點(diǎn)。煉鋼、銹造等高溫車間經(jīng)常采用這種通風(fēng)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） 通風(fēng)

2) comprehensive ventilation

通風(fēng)是對整個房間進(jìn)行通風(fēng)換氣。通風(fēng)包括排風(fēng)，送風(fēng)和送、排風(fēng)。

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

①排風(fēng)

Overall exhaust ventilation

排風(fēng)是從整個房間排除有害物質(zhì)的通風(fēng)方式，為了使室內(nèi)產(chǎn)生的有害物盡可能不擴(kuò)散到其它區(qū)域或領(lǐng)室去，可以在有害物比較集中產(chǎn)生的區(qū)域或房間采用機(jī)械排風(fēng)。圖2-4位機(jī)械排風(fēng)系統(tǒng)，圖2-4（a）是在墻上裝有軸流風(fēng)機(jī)的簡單排風(fēng)系統(tǒng)。

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送風(fēng)

Overall air supply

把符合衛(wèi)生要求的空氣送到整個房間各個部位的送風(fēng)系統(tǒng)稱為送風(fēng)。可以通過自然通風(fēng)和機(jī)械通風(fēng)來實(shí)現(xiàn)。機(jī)械送風(fēng)系統(tǒng)如圖2-5所示，經(jīng)過處理后的空氣，在風(fēng)機(jī)的作用下，經(jīng)風(fēng)管、送風(fēng)口送入整個房間的各個部位，而排風(fēng)可通過排風(fēng)口或門窗排出。

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、排風(fēng)

Overall delivery and exhaust

在門窗緊閉，自然排風(fēng)或進(jìn)風(fēng)比較困難的房間，常采用圖2-4所示排風(fēng)和圖2-5所示的送風(fēng)相結(jié)合的送、排風(fēng)系統(tǒng)。

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.