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消費者在選購(gou)時(shi)可(ke)以(yi)從以(yi)下(xia)三(san)個方面(mian)辨別假“中(zhong)空(kong)(kong)(kong)(kong)(kong)”和真(zhen)(zhen)中(zhong)空(kong)(kong)(kong)(kong)(kong)：玻璃(li)是否(fou)密(mi)封(feng)。不少假中(zhong)空(kong)(kong)(kong)(kong)(kong)玻璃(li)門(men)(men)(men)窗(chuang)(chuang)的(de)兩(liang)(liang)片(pian)玻璃(li)是用(yong)中(zhong)空(kong)(kong)(kong)(kong)(kong)玻璃(li)加(jia)工(gong)設(she)備(bei)中(zhong)空(kong)(kong)(kong)(kong)(kong)玻璃(li)加(jia)工(gong)設(she)備(bei)黑(hei)色PVC發泡(pao)條(tiao)黏(nian)合的(de)，并沒有(you)(you)密(mi)封(feng)效果。而(er)(er)真(zhen)(zhen)正(zheng)的(de)中(zhong)空(kong)(kong)(kong)(kong)(kong)玻璃(li)門(men)(men)(men)窗(chuang)(chuang)是用(yong)專用(yong)密(mi)封(feng)膠條(tiao)黏(nian)合玻璃(li)的(de)，可(ke)以(yi)保證一定(ding)密(mi)封(feng)。其次，真(zhen)(zhen)中(zhong)空(kong)(kong)(kong)(kong)(kong)玻璃(li)兩(liang)(liang)片(pian)玻璃(li)之(zhi)間有(you)(you)一條(tiao)鋁隔(ge)條(tiao)，鋁隔(ge)條(tiao)上(shang)還(huan)有(you)(you)許多(duo)透氣孔，里面(mian)放(fang)上(shang)干燥劑，可(ke)以(yi)吸收氣體中(zhong)的(de)水分，防止玻璃(li)門(men)(men)(men)窗(chuang)(chuang)受(shou)熱后(hou)出現“霧蒙蒙”的(de)現象(xiang)，而(er)(er)假“中(zhong)空(kong)(kong)(kong)(kong)(kong)”玻璃(li)沒有(you)(you)這些(xie)設(she)備(bei)。之(zhi)后(hou)，實地測試門(men)(men)(men)窗(chuang)(chuang)的(de)隔(ge)音效果。真(zhen)(zhen)中(zhong)空(kong)(kong)(kong)(kong)(kong)玻璃(li)門(men)(men)(men)窗(chuang)(chuang)的(de)隔(ge)音效果非常(chang)好，而(er)(er)假“中(zhong)空(kong)(kong)(kong)(kong)(kong)”門(men)(men)(men)窗(chuang)(chuang)的(de)隔(ge)音效果則(ze)很一般。

此外，玻璃清(qing)洗機(ji)玻璃清(qing)洗機(ji)型(xing)材(cai)里安裝的寸鋼(gang)也有質量上的差異。好的寸鋼(gang)厚度在1.2毫米以上，而劣質型(xing)材(cai)使用的寸鋼(gang)往往厚度不夠，甚至還有黑(hei)心商家在型(xing)材(cai)里套木頭來欺(qi)騙消費者，這些都要注意。

型材(cai)質量的(de)辨別優質中空玻(bo)璃門(men)窗使用(yong)的(de)是優質型材(cai)，而劣質中空玻(bo)璃門(men)窗使用(yong)的(de)是低(di)檔型材(cai)，有的(de)甚至(zhi)是動了手腳的(de)二次回收型材(cai)（外觀(guan)貼上知名型材(cai)的(de)薄膜，以次充好）。優質的(de)型材(cai)看上去(qu)表面(mian)光滑(hua)細膩、平整潔凈、顏色(se)(se)均勻；沒有裂痕、氣泡；焊接(jie)處沒有斷裂開焊的(de)現象(xiang)；硬(ying)度(du)厚度(du)足夠，用(yong)榔(lang)頭敲(qiao)擊型材(cai)表面(mian)不(bu)出(chu)現破(po)裂。而劣質的(de)型材(cai)顏色(se)(se)不(bu)均勻，有氣泡雜質，用(yong)榔(lang)頭敲(qiao)擊會出(chu)現破(po)裂，甚至(zhi)用(yong)手捏(nie)都會變(bian)形。

據介紹(shao)，正規(gui)的中(zhong)(zhong)(zhong)空(kong)玻(bo)璃(li)(li)生(sheng)產(chan)線中(zhong)(zhong)(zhong)空(kong)玻(bo)璃(li)(li)生(sheng)產(chan)線中(zhong)(zhong)(zhong)空(kong)玻(bo)璃(li)(li)門窗(chuang) ，要先將兩片(pian)玻(bo)璃(li)(li)用密(mi)封(feng)膠條密(mi)封(feng)好，將中(zhong)(zhong)(zhong)間抽成真(zhen)空(kong)，再填入惰性(xing)氣體。這樣的結構使(shi)得真(zhen)正的中(zhong)(zhong)(zhong)空(kong)玻(bo)璃(li)(li)門窗(chuang)具有(you)良好的隔音(yin)隔熱性(xing)能。而前不少廉價劣質的“中(zhong)(zhong)(zhong)空(kong)”玻(bo)璃(li)(li)門窗(chuang)只是簡(jian)單(dan)將兩塊(kuai)玻(bo)璃(li)(li)膠合起來，并(bing)沒(mei)(mei)有(you)經過上(shang)述(shu)處(chu)理，因(yin)此也沒(mei)(mei)有(you)中(zhong)(zhong)(zhong)空(kong)玻(bo)璃(li)(li)所(suo)有(you)的那種(zhong)隔音(yin)隔熱效果。