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消(xiao)費者在選購時可以從(cong)以下三(san)個方面辨別假(jia)“中(zhong)(zhong)(zhong)空(kong)(kong)”和真(zhen)中(zhong)(zhong)(zhong)空(kong)(kong)：玻(bo)(bo)璃(li)(li)(li)是否密(mi)封(feng)。不少假(jia)中(zhong)(zhong)(zhong)空(kong)(kong)玻(bo)(bo)璃(li)(li)(li)門(men)窗的(de)(de)(de)兩片(pian)玻(bo)(bo)璃(li)(li)(li)是用(yong)中(zhong)(zhong)(zhong)空(kong)(kong)玻(bo)(bo)璃(li)(li)(li)加(jia)工(gong)設(she)(she)(she)備(bei)中(zhong)(zhong)(zhong)空(kong)(kong)玻(bo)(bo)璃(li)(li)(li)加(jia)工(gong)設(she)(she)(she)備(bei)黑色PVC發泡條黏(nian)合的(de)(de)(de)，并沒有密(mi)封(feng)效(xiao)果(guo)。而真(zhen)正(zheng)的(de)(de)(de)中(zhong)(zhong)(zhong)空(kong)(kong)玻(bo)(bo)璃(li)(li)(li)門(men)窗是用(yong)專(zhuan)用(yong)密(mi)封(feng)膠條黏(nian)合玻(bo)(bo)璃(li)(li)(li)的(de)(de)(de)，可以保證一(yi)定密(mi)封(feng)。其(qi)次(ci)，真(zhen)中(zhong)(zhong)(zhong)空(kong)(kong)玻(bo)(bo)璃(li)(li)(li)兩片(pian)玻(bo)(bo)璃(li)(li)(li)之間(jian)有一(yi)條鋁隔條，鋁隔條上還有許多透氣(qi)(qi)孔(kong)，里(li)面放(fang)上干(gan)燥劑，可以吸收氣(qi)(qi)體中(zhong)(zhong)(zhong)的(de)(de)(de)水分(fen)，防止玻(bo)(bo)璃(li)(li)(li)門(men)窗受熱后出現“霧蒙(meng)蒙(meng)”的(de)(de)(de)現象，而假(jia)“中(zhong)(zhong)(zhong)空(kong)(kong)”玻(bo)(bo)璃(li)(li)(li)沒有這些(xie)設(she)(she)(she)備(bei)。之后，實地測試門(men)窗的(de)(de)(de)隔音(yin)效(xiao)果(guo)。真(zhen)中(zhong)(zhong)(zhong)空(kong)(kong)玻(bo)(bo)璃(li)(li)(li)門(men)窗的(de)(de)(de)隔音(yin)效(xiao)果(guo)非常好，而假(jia)“中(zhong)(zhong)(zhong)空(kong)(kong)”門(men)窗的(de)(de)(de)隔音(yin)效(xiao)果(guo)則很(hen)一(yi)般。

此外(wai)，玻璃(li)清(qing)(qing)洗機玻璃(li)清(qing)(qing)洗機型(xing)材里安裝的寸(cun)鋼也(ye)有(you)質(zhi)量上的差異。好的寸(cun)鋼厚度(du)(du)在1.2毫米(mi)以(yi)上，而劣質(zhi)型(xing)材使(shi)用的寸(cun)鋼往(wang)往(wang)厚度(du)(du)不夠(gou)，甚至還有(you)黑心商家在型(xing)材里套(tao)木頭來欺(qi)騙(pian)消費者，這些都要注意(yi)。

型(xing)材(cai)質(zhi)量的辨別優質(zhi)中空(kong)玻璃(li)門窗使用的是(shi)優質(zhi)型(xing)材(cai)，而劣質(zhi)中空(kong)玻璃(li)門窗使用的是(shi)低(di)檔型(xing)材(cai)，有的甚至是(shi)動了手腳的二次回收(shou)型(xing)材(cai)（外觀貼上(shang)知名型(xing)材(cai)的薄膜，以(yi)次充好）。優質(zhi)的型(xing)材(cai)看上(shang)去表面(mian)光滑細膩、平整潔凈、顏(yan)色均(jun)勻；沒有裂(lie)痕、氣泡；焊接(jie)處沒有斷裂(lie)開(kai)焊的現(xian)象；硬(ying)度厚度足(zu)夠，用榔頭敲擊型(xing)材(cai)表面(mian)不(bu)(bu)出現(xian)破裂(lie)。而劣質(zhi)的型(xing)材(cai)顏(yan)色不(bu)(bu)均(jun)勻，有氣泡雜質(zhi)，用榔頭敲擊會(hui)出現(xian)破裂(lie)，甚至用手捏都(dou)會(hui)變(bian)形。

據介紹，正(zheng)規的(de)(de)中(zhong)空(kong)(kong)(kong)玻璃(li)(li)生產(chan)線中(zhong)空(kong)(kong)(kong)玻璃(li)(li)生產(chan)線中(zhong)空(kong)(kong)(kong)玻璃(li)(li)門窗(chuang)(chuang) ，要先(xian)將兩(liang)片玻璃(li)(li)用密封膠條密封好，將中(zhong)間抽成真空(kong)(kong)(kong)，再填入(ru)惰性氣體(ti)。這樣的(de)(de)結構使得真正(zheng)的(de)(de)中(zhong)空(kong)(kong)(kong)玻璃(li)(li)門窗(chuang)(chuang)具有(you)良好的(de)(de)隔音(yin)隔熱性能。而(er)前不少廉(lian)價劣質的(de)(de)“中(zhong)空(kong)(kong)(kong)”玻璃(li)(li)門窗(chuang)(chuang)只是簡單將兩(liang)塊玻璃(li)(li)膠合起來，并(bing)沒(mei)有(you)經過(guo)上述(shu)處(chu)理(li)，因此也沒(mei)有(you)中(zhong)空(kong)(kong)(kong)玻璃(li)(li)所(suo)有(you)的(de)(de)那種隔音(yin)隔熱效果(guo)。