通风(feng)系统(tong)通常(chang)由通风(feng)设备、通风(feng)管(guan)道、消音器、风(feng)扇和控制系统(tong)组成(cheng)。

1，通风设备:棉花糖直播在线观看:实验室常用通风设备主要包括:棉花糖直播在线观看:通风柜、原(yuan)子吸(xi)(xi)收(shou)罩、通(tong)(tong)(tong)(tong)用(yong)排(pai)气(qi)(qi)(qi)罩、桌(zhuo)面(mian)(mian)通(tong)(tong)(tong)(tong)风罩等。通(tong)(tong)(tong)(tong)风柜is通(tong)(tong)(tong)(tong)风安(an)全处理(li)有害有毒气(qi)(qi)(qi)体(ti)或(huo)蒸汽的(de)(de)(de)设(she)(she)备。其(qi)功(gong)能(neng)是(shi)(shi)(shi)捕(bu)获(huo)、密(mi)封和转移污染物和有害气(qi)(qi)(qi)体(ti)，以(yi)防(fang)止它们逃逸到实(shi)验室(shi)(shi)，从而(er)最大限度(du)地(di)减少操作(zuo)人员通(tong)(tong)(tong)(tong)过吸(xi)(xi)入(ru)工作(zuo)区域的(de)(de)(de)污染物而(er)吸(xi)(xi)入(ru)和接触的(de)(de)(de)污染物。通(tong)(tong)(tong)(tong)风柜中的(de)(de)(de)气(qi)(qi)(qi)流通(tong)(tong)(tong)(tong)过排(pai)气(qi)(qi)(qi)扇(shan)将(jiang)实(shi)验室(shi)(shi)中的(de)(de)(de)空气(qi)(qi)(qi)吸(xi)(xi)入(ru)通(tong)(tong)(tong)(tong)风柜中，稀释通(tong)(tong)(tong)(tong)风柜中的(de)(de)(de)污染空气(qi)(qi)(qi)，并通(tong)(tong)(tong)(tong)过通(tong)(tong)(tong)(tong)风系(xi)统(tong)将(jiang)其(qi)排(pai)出(chu)室(shi)(shi)外，从而(er)实(shi)现低浓度(du)扩散(san)。原(yuan)子吸(xi)(xi)收(shou)罩主要(yao)(yao)(yao)适(shi)(shi)用(yong)于大规模精密(mi)仪(yi)器(qi)，如原(yuan)子吸(xi)(xi)收(shou)仪(yi)器(qi)，涉及高温，需(xu)要(yao)(yao)(yao)局部通(tong)(tong)(tong)(tong)风。需(xu)要(yao)(yao)(yao)定位(wei)(wei)和安(an)装(zhuang)，这也是(shi)(shi)(shi)实(shi)验室(shi)(shi)总体(ti)规划中必须考虑的(de)(de)(de)因素之一。通(tong)(tong)(tong)(tong)用(yong)吸(xi)(xi)油(you)烟机是(shi)(shi)(shi)本地(di)通(tong)(tong)(tong)(tong)风的(de)(de)(de)首(shou)选(xuan)，安(an)装(zhuang)简单，定位(wei)(wei)灵活。通(tong)(tong)(tong)(tong)风性能(neng)良好，能(neng)有效(xiao)保护实(shi)验室(shi)(shi)工人的(de)(de)(de)人身(shen)安(an)全。适(shi)(shi)用(yong)于液相(xiang)色谱(pu)、气(qi)(qi)(qi)相(xiang)色谱(pu)或(huo)少量废气(qi)(qi)(qi)、无高温的(de)(de)(de)实(shi)验。桌(zhuo)面(mian)(mian)通(tong)(tong)(tong)(tong)风盖主要(yao)(yao)(yao)适(shi)(shi)用(yong)于有机化学或(huo)需(xu)要(yao)(yao)(yao)长期(qi)蒸馏的(de)(de)(de)实(shi)验室(shi)(shi)。它是(shi)(shi)(shi)解决实(shi)验室(shi)(shi)整体(ti)通(tong)(tong)(tong)(tong)风要(yao)(yao)(yao)求(qiu)的(de)(de)(de)必要(yao)(yao)(yao)设(she)(she)备之一。

2，通风管道对于普通建筑，如果室内排放的气体无腐蚀性，通风管道可采用镀锌钢板。对于产生腐蚀性气体的实验室，风管应采用耐腐蚀材料制成的聚氯乙烯风管或玻璃钢风管。在总体实验室通风项目中，聚氯乙烯风管主要用于室内，玻璃钢风管主要用于室外。根据相关国家标准， 风管壁厚如下:中低压系统硬质聚氯乙烯圆形风管板厚(mm)

风管直径D

板厚(mm)

d ≤ 320

3.0

320 4.0

中低压系统硬质聚(ju)氯(lv)乙烯矩形风管板厚(mm)

风管长边尺寸b

板厚(mm)

b≤320

3.0

320 4.0

500 5.0

800 6.0

对于室内地(di)板(ban)高度(du)不足的实验(yan)室或具有大风管(guan)的实验(yan)室，通常使(shi)用(yong)方(fang)形风管(guan)来匹(pi)配场(chang)地(di)空间(jian)。 在满足风管(guan)要求的前提下(xia)，风管(guan)占用(yong)空间(jian)最小(xiao)。圆(yuan)形风管(guan)通过(guo)(guo)插(cha)件(jian)连(lian)接，方(fang)形风管(guan)通过(guo)(guo)法兰连(lian)接，插(cha)件(jian)也可以根(gen)据实际情(qing)况使(shi)用(yong)。

3。风机主要包括轴流风机、斜流风机和离心风机。轴流风扇和斜流风扇适用于具有小风压和短管道的通风系统，例如直接从窗户或墙外排放的通风系统，称为直接排放。玻璃离心风机适用于通风长管道系统，如通过风管轴或外墙连接管排放到屋顶，简称屋顶排放。风机材料:一般分为玻璃钢、PP、聚氯乙烯等。风扇的类型根据风量和气压来选择。

4，通风控制系统

通风控(kong)(kong)制系统可根据(ju)不同情况采用不同的控(kong)(kong)制方法，如(ru)单个(ge)通风设备恒定(ding)风量控(kong)(kong)制系统、多(duo)个(ge)通风设备恒定(ding)风量控(kong)(kong)制系统、多(duo)个(ge)通风设备变频通风控(kong)(kong)制系统、多(duo)个(ge)通风设备

单个通风装置的恒定风量通风控制系统意味着每个解毒装置柜的废气通过一组独立的通风管道和台风有效地排放到大气中。风机开关和排气系统启动安装在解毒柜或通风设备上，解毒柜上方的控制阀为电动阀或手动阀。

多个(ge)通(tong)(tong)风(feng)(feng)(feng)设(she)备的恒(heng)定(ding)风(feng)(feng)(feng)量通(tong)(tong)风(feng)(feng)(feng)控(kong)制系统是指(zhi)多个(ge)通(tong)(tong)风(feng)(feng)(feng)柜(ju)和通(tong)(tong)风(feng)(feng)(feng)设(she)备通(tong)(tong)过一组管道串(chuan)联由风(feng)(feng)(feng)机排(pai)出，解毒柜(ju)上方的控(kong)制阀(fa)为电动(dong)阀(fa)。

多台通风设备的变频通风控制系统是指多台通风设备共用一台风机，采用变频控制技术根据通风设备的使用情况自动调节风机的运行，达到节能的目的。排管柜上方的控制阀是一种电子空气调节阀，是一种新型微机空气阀。

变频变风量控(kong)制系(xi)统是指通(tong)风控(kong)制系(xi)统，用于解决通(tong)风设备末端(duan)的变风量要(yao)求和地面(mian)风速恒定的要(yao)求，实现进(jin)一步(bu)节(jie)能。包括(kuo)风速传感(gan)器、红(hong)外探(tan)测器、可变风量控(kong)制阀、自动控(kong)制面(mian)板和操作终端(duan)。