主要問(wen)題(ti)
中(zhong)(zhong)空(kong)玻(bo)璃(li)作為建(jian)筑節能(neng)材料(liao),因其(qi)具(ju)有(you)良好的(de)隔熱和(he)隔音(yin)性能(neng)而被廣泛應(ying)用(yong)。同時對中(zhong)(zhong)空(kong)玻(bo)璃(li)的(de)質量要(yao)求越(yue)來越(yue)高。據了(le)解,中(zhong)(zhong)空(kong)玻(bo)璃(li)zui大(da)的(de)質量(liang)問題就是在使用(yong)中(zhong)(zhong)(zhong)空氣(qi)(qi)層結露(lu),而空氣(qi)(qi)層結露(lu)的(de)原因就是空氣(qi)(qi)層的(de)露(lu)點在使用(yong)過程中(zhong)(zhong)(zhong)升高了。因此(ci)控制(zhi)中(zhong)(zhong)(zhong)空玻璃的(de)露(lu)點是控制(zhi)中(zhong)(zhong)(zhong)空玻璃質量(liang)的(de)關鍵。
中空(kong)(kong)(kong)(kong)玻(bo)(bo)璃(li)(li)(li)在(zai)(zai)使(shi)用過程中,當環(huan)境溫(wen)度(du)(du)降低(di)到使(shi)玻(bo)(bo)璃(li)(li)(li)表(biao)面(mian)溫(wen)度(du)(du)降低(di)至干(gan)燥(zao)空(kong)(kong)(kong)(kong)氣(qi)(qi)層內的(de)(de)露點時,干(gan)燥(zao)空(kong)(kong)(kong)(kong)氣(qi)(qi)層的(de)(de)表(biao)面(mian)會產生結(jie)(jie)露或結(jie)(jie)霜(shuang)。由于玻(bo)(bo)璃(li)(li)(li)內表(biao)面(mian)的(de)(de)結(jie)(jie)露或結(jie)(jie)霜(shuang)而(er)影響中空(kong)(kong)(kong)(kong)玻(bo)(bo)璃(li)(li)(li)性(xing)能。如果保(bao)證空(kong)(kong)(kong)(kong)氣(qi)(qi)層在(zai)(zai)零下40攝(she)氏(shi)度(du)(du)以(yi)上(shang)不結(jie)(jie)露,中空(kong)(kong)(kong)(kong)玻(bo)(bo)璃(li)(li)(li)在(zai)(zai)使(shi)用過程中是(shi)不出現空(kong)(kong)(kong)(kong)氣(qi)(qi)層結(jie)(jie)露現象的(de)(de)。
中空(kong)(kong)玻(bo)璃(li)的露點(dian)是指密封于(yu)(yu)空(kong)(kong)氣(qi)層(ceng)中的空(kong)(kong)氣(qi)濕度(du)達到飽和狀態時(shi)(shi)的溫度(du)。低(di)于(yu)(yu)該溫度(du),空(kong)(kong)氣(qi)層(ceng)中的水(shui)蒸汽就會凝結成液態水(shui)。可推出:水(shui)的含量(liang)越(yue)高(gao),空(kong)(kong)氣(qi)的露點(dian)溫度(du)也就越(yue)高(gao),當玻(bo)璃(li)內(nei)表(biao)面(mian)溫度(du)低(di)于(yu)(yu)空(kong)(kong)氣(qi)層(ceng)內(nei)空(kong)(kong)氣(qi)的露點(dian)時(shi)(shi),空(kong)(kong)氣(qi)中的水(shui)分就會在玻(bo)璃(li)內(nei)表(biao)面(mian)結露或結霜(shuang)。
中空玻璃的露(lu)點上升是由外(wai)界(jie)的水分進入空氣層而不被干燥劑吸收而造(zao)成的,有三種原因可能(neng)會導致(zhi)露(lu)點上升:
(1)內存有氣泡(pao),導致空氣水(shui)分進入。
(2)水氣通過聚合(he)物擴散進入空氣層中。
(3)干燥劑的有效吸(xi)附(fu)能(neng)力低。
——來源 百度百科