按照波(bo)長,紫外(Ultra Violet,UV)光(guang)通(tong)(tong)常分(fen)(fen)為UVA(315nm-400nm)、UVB(280nm-315nm)、UVC(200nm-280nm)。其(qi)(qi)中(zhong)(zhong)波(bo)長UVC波(bo)段(duan)又稱為“日盲”波(bo)段(duan),由于(yu)大氣(qi)中(zhong)(zhong)臭氧的(de)強(qiang)烈吸收(shou),在(zai)近地太陽光(guang)譜中(zhong)(zhong)幾(ji)乎(hu)不含有該波(bo)段(duan)紫外光(guang)。UVC主(zhu)要應(ying)用包括(kuo)水(shui)/空氣(qi)/表面的(de)消毒(du)/凈(jing)化(hua)、分(fen)(fen)析(xi)儀器(分(fen)(fen)光(guang)光(guang)度(du)法(fa)、液相(xiang)色譜、氣(qi)相(xiang)色譜等),礦物分(fen)(fen)析(xi)。UVC波(bo)段(duan)波(bo)長短,能量高,短時間內破壞微生物機體(細(xi)菌(jun)(jun)、病(bing)毒(du)等病(bing)原(yuan)體)細(xi)胞中(zhong)(zhong)分(fen)(fen)子(zi)結(jie)構,通(tong)(tong)過破壞微生物的(de)DNA和RNA阻止其(qi)(qi)繁(fan)殖,可以實現高效快速的(de)廣(guang)譜殺菌(jun)(jun)效果,從(cong)而對水(shui)、空氣(qi)和物體表面進行殺菌(jun)(jun)消毒(du),使細(xi)胞無法(fa)再生,因(yin)此(ci)廣(guang)泛應(ying)用于(yu)醫療衛生領域,在(zai)個人(ren)健(jian)康和家(jia)庭衛生領域,紫外光(guang)可用于(yu)水(shui)杯(bei)碗筷消毒(du)、空氣(qi)凈(jing)化(hua)除菌(jun)(jun)、殺滅螨蟲、鞋襪殺菌(jun)(jun)除臭、嬰兒奶瓶消毒(du)等。
相(xiang)比于其他殺(sha)菌(jun)方法如加氯法、臭氧法及紫外汞燈殺(sha)菌(jun)法,深紫外LED殺(sha)菌(jun)有諸多(duo)優勢:
(1)高效(xiao)殺菌(jun)性,深紫外(wai)(wai)LED所發出的UVC段紫外(wai)(wai)光對細菌(jun)、病毒殺滅作用一(yi)般(ban)在幾(ji)秒以內,傳統水殺菌(jun)方法如氯化物以及(ji)臭(chou)氧(yang)等(deng)方法,達到深紫外(wai)(wai)殺菌(jun)效(xiao)率一(yi)般(ban)需要20分(fen)鐘(zhong)至1小(xiao)時;
(2)廣泛殺菌(jun)(jun)性,由于(yu)細菌(jun)(jun)、病(bing)毒抗原體等(deng)微(wei)生(sheng)物對紫(zi)外(wai)光不具(ju)有(you)可(ke)抗性,因此深紫(zi)外(wai)光對大部分細菌(jun)(jun)和病(bing)毒都能高(gao)效(xiao)率殺滅(mie),并且深紫(zi)外(wai)LED殺菌(jun)(jun)技(ji)術,還能在(zai)一(yi)定程度上(shang)抑(yi)制一(yi)些較高(gao)等(deng)的水生(sheng)生(sheng)物生(sheng)長(chang),如藻類、紅蟲、草履蟲等(deng);
(3)安全(quan)環保(不(bu)含汞(gong)(gong)),深(shen)紫(zi)(zi)外LED器(qi)件相(xiang)對(dui)于目前(qian)市場上的(de)汞(gong)(gong)激發(fa)紫(zi)(zi)外燈(deng)最明顯(xian)優(you)勢在于其殺(sha)菌光(guang)源不(bu)含汞(gong)(gong),而(er)汞(gong)(gong)是(shi)一(yi)種(zhong)重(zhong)金屬物(wu)質,俗稱水(shui)銀,汞(gong)(gong)在常溫下(xia)即可蒸發(fa),汞(gong)(gong)蒸氣和(he)汞(gong)(gong)化合物(wu)有(you)劇毒(慢性),傳統紫(zi)(zi)外汞(gong)(gong)燈(deng)殺(sha)菌燈(deng)在殺(sha)菌過程(cheng)中(zhong),一(yi)旦燈(deng)管(guan)破裂,將(jiang)引起嚴(yan)重(zhong)的(de)水(shui)質污(wu)染(ran),而(er)深(shen)紫(zi)(zi)外LED器(qi)件是(shi)一(yi)種(zhong)安全(quan)可靠(kao)的(de)裝(zhuang)置,不(bu)含重(zhong)金屬,操作(zuo)簡(jian)單(dan)、運(yun)行安全(quan)可靠(kao);
(4)節能(neng)、壽命長、維護成(cheng)本(ben)低(di),深(shen)紫(zi)(zi)外(wai)(wai)LED殺菌器正逐漸取代(dai)市(shi)場上普遍的汞燈紫(zi)(zi)外(wai)(wai)殺菌器,重要原因之一(yi)是紫(zi)(zi)外(wai)(wai)LED功耗較低(di),十分節能(neng),深(shen)紫(zi)(zi)外(wai)(wai)LED功率大約(yue)是汞燈十分之一(yi),這一(yi)比(bi)率大大節省(sheng)了成(cheng)本(ben);
(5)體積小、設(she)計靈活(huo)、安裝方(fang)便(bian),深紫(zi)(zi)外LED器件(jian),體積小,其(qi)殺菌裝置設(she)計靈活(huo),可以應(ying)用在傳統(tong)紫(zi)(zi)外汞燈(deng)無法應(ying)用的狹小空間(jian)。