通風管道設計有哪些原(yuan)則？下面(mian)凱瑞(rui)空調公(gong)司的小編為大(da)家介紹一(yi)下；

　　通(tong)(tong)風(feng)(feng)管(guan)(guan)(guan)(guan)(guan)(guan)道是為了使空氣流(liu)通(tong)(tong)，降低有害氣體濃度的(de)一(yi)種市政基礎(chu)設(she)施。通(tong)(tong)風(feng)(feng)管(guan)(guan)(guan)(guan)(guan)(guan)，風(feng)(feng)管(guan)(guan)(guan)(guan)(guan)(guan)制作與安(an)裝所(suo)用(yong)板(ban)材(cai)(cai)(cai)、型材(cai)(cai)(cai)以及其他主要成品(pin)材(cai)(cai)(cai)料，應(ying)符合設(she)計及相關產品(pin)國家(jia)現行(xing)標準(zhun)的(de)規定，并應(ying)用(yong)出廠檢驗合格證明，材(cai)(cai)(cai)料進場時應(ying)按國家(jia)現行(xing)有關標準(zhun)進行(xing)驗收(shou)。通(tong)(tong)風(feng)(feng)管(guan)(guan)(guan)(guan)(guan)(guan)道按材(cai)(cai)(cai)質分：一(yi)般有：鋼(gang)板(ban)風(feng)(feng)管(guan)(guan)(guan)(guan)(guan)(guan)（普通(tong)(tong)鋼(gang)板(ban)）、鍍鋅(xin)板(ban)（白鐵）風(feng)(feng)管(guan)(guan)(guan)(guan)(guan)(guan)、不銹鋼(gang)通(tong)(tong)風(feng)(feng)管(guan)(guan)(guan)(guan)(guan)(guan)、玻(bo)璃鋼(gang)通(tong)(tong)風(feng)(feng)管(guan)(guan)(guan)(guan)(guan)(guan)、塑料通(tong)(tong)風(feng)(feng)管(guan)(guan)(guan)(guan)(guan)(guan)、復合材(cai)(cai)(cai)料通(tong)(tong)風(feng)(feng)管(guan)(guan)(guan)(guan)(guan)(guan)、彩鋼(gang)夾心保(bao)溫(wen)(wen)板(ban)通(tong)(tong)風(feng)(feng)管(guan)(guan)(guan)(guan)(guan)(guan)、雙面(mian)鋁(lv)箔保(bao)溫(wen)(wen)通(tong)(tong)風(feng)(feng)管(guan)(guan)(guan)(guan)(guan)(guan)、單面(mian)彩鋼(gang)保(bao)溫(wen)(wen)風(feng)(feng)管(guan)(guan)(guan)(guan)(guan)(guan)、涂膠布通(tong)(tong)風(feng)(feng)管(guan)(guan)(guan)(guan)(guan)(guan)（如礦用(yong)風(feng)(feng)筒）、礦用(yong)塑料通(tong)(tong)風(feng)(feng)管(guan)(guan)(guan)(guan)(guan)(guan)等；

　　首先，風管(guan)(guan)應盡可(ke)能按直(zhi)線(xian)布(bu)置。這一條要(yao)求對(dui)任何風管(guan)(guan)系統的布(bu)置都(dou)是最重要(yao)的準則。直(zhi)線(xian)布(bu)置的風管(guan)(guan)系統，在運行(xing)能耗和初投資兩方面都(dou)是最低的。從節能的觀點(dian)分析，空氣總是"希望"走直(zhi)線(xian)，這將減少能耗。從費(fei)用(yong)的觀點(dian)分析，直(zhi)管(guan)(guan)段的費(fei)用(yong)比(bi)各種(zhong)彎頭等管(guan)(guan)件(jian)要(yao)少很多。

　　其次，采用標(biao)(biao)準長(chang)(chang)度(du)(du)的直(zhi)(zhi)線(xian)管(guan)段，將各種變徑管(guan)和接頭(tou)的數量減(jian)至合理范圍(wei)。直(zhi)(zhi)的、標(biao)(biao)準長(chang)(chang)度(du)(du)的通風(feng)(feng)(feng)管(guan)道造(zao)價相對便宜，因為(wei)它們的加(jia)(jia)工費(fei)低，標(biao)(biao)準長(chang)(chang)度(du)(du)的直(zhi)(zhi)風(feng)(feng)(feng)管(guan)，可(ke)按標(biao)(biao)準寬度(du)(du)的鋼板卷材(cai)在白動生(sheng)產線(xian)上(shang)(shang)(shang)制作(zuo)。而(er)任何段非標(biao)(biao)準長(chang)(chang)度(du)(du)的矩形(xing)風(feng)(feng)(feng)管(guan)，從技術上(shang)(shang)(shang)說，都可(ke)當作(zuo)配件(jian)，因為(wei)它們不可(ke)能用標(biao)(biao)準卷材(cai)做成。螺旋圓(yuan)形(xing)風(feng)(feng)(feng)管(guan)實(shi)際(ji)上(shang)(shang)(shang)可(ke)做成任意長(chang)(chang)度(du)(du)。橢圓(yuan)形(xing)風(feng)(feng)(feng)管(guan)的標(biao)(biao)準長(chang)(chang)度(du)(du)則(ze)完全取決于金屬(shu)加(jia)(jia)工廠(chang)的加(jia)(jia)工標(biao)(biao)準。有的設(she)計(ji)者總是認為(wei)，在一個風(feng)(feng)(feng)管(guan)系(xi)統平(ping)面設(she)計(ji)中，頻繁(fan)地減(jian)小風(feng)(feng)(feng)管(guan)斷面尺寸，似乎就可(ke)以減(jian)少一次投資。其實(shi)不然。

　　第三(san)，只(zhi)要安裝空(kong)(kong)間范圍允許(xu)(xu)，就建議采用螺旋(xuan)圓管(guan)道(dao)。圓形(xing)通(tong)風(feng)管(guan)道(dao)允許(xu)(xu)采用較(jiao)高的(de)風(feng)速。一(yi)個中(zhong)型(xing)變(bian)風(feng)量空(kong)(kong)調系統(tong)，其(qi)風(feng)速可達(da)20m/s，而(er)一(yi)個大(da)型(xing)變(bian)風(feng)量寧調系統(tong)，其(qi)風(feng)速則可高達(da)30m/S。對矩形(xing)通(tong)風(feng)管(guan)道(dao)的(de)允許(xu)(xu)風(feng)速則一(yi)般都較(jiao)低，風(feng)速過(guo)高容易引(yin)起扁平風(feng)管(guan)壁的(de)共振而(er)產生(sheng)噪(zao)(zao)聲，特別是會產生(sheng)低頻噪(zao)(zao)聲并傳至室(shi)內。