PTC加熱(re)器(qi)的(de)按結(jie)構特點分
(1)普通實用(yong)型PTC加(jia)熱(re)器(qi)(qi)(qi)陶瓷(ci)加(jia)熱(re)器(qi)(qi)(qi).這類(lei)器(qi)(qi)(qi)具主要有:?電熱(re)蚊(wen)藥驅蚊(wen)器(qi)(qi)(qi)、暖(nuan)手(shou)器(qi)(qi)(qi)、干(gan)燥器(qi)(qi)(qi)、電熱(re)板(ban)、電燙斗、電烙鐵、電熱(re)粘合器(qi)(qi)(qi)、卷發(fa)燙發(fa)器(qi)(qi)(qi)等.其特點是(shi)功(gong)率不大,但熱(re)效(xiao)率高很實用(yong).
(2)自動恒(heng)(heng)溫(wen)(wen)(wen)(wen)型PTC加熱器加熱器.這類器具主(zhu)要有:小(xiao)型晶(jing)體器件恒(heng)(heng)溫(wen)(wen)(wen)(wen)槽、恒(heng)(heng)溫(wen)(wen)(wen)(wen)培養箱、電子保(bao)(bao)溫(wen)(wen)(wen)(wen)瓶、?保(bao)(bao)溫(wen)(wen)(wen)(wen)箱、保(bao)(bao)溫(wen)(wen)(wen)(wen)杯、保(bao)(bao)溫(wen)(wen)(wen)(wen)盤、保(bao)(bao)溫(wen)(wen)(wen)(wen)柜(ju)、保(bao)(bao)溫(wen)(wen)(wen)(wen)桌等。其特(te)點是自動保(bao)(bao)溫(wen)(wen)(wen)(wen)、結(jie)構簡(jian)單、?恒(heng)(heng)溫(wen)(wen)(wen)(wen)特(te)性(xing)好、熱效率高、使(shi)用環境溫(wen)(wen)(wen)(wen)度范圍寬.??
(3)熱(re)(re)(re)風PTC加(jia)熱(re)(re)(re)器(qi)(qi)加(jia)熱(re)(re)(re)器(qi)(qi).這類熱(re)(re)(re)風PTC加(jia)熱(re)(re)(re)器(qi)(qi)加(jia)熱(re)(re)(re)器(qi)(qi)主要(yao)有:小型(xing)溫風取(qu)暖(nuan)器(qi)(qi)、電吹風、暖(nuan)房機(ji)、烘干(gan)(gan)(gan)機(ji)、干(gan)(gan)(gan)衣(yi)柜、干(gan)(gan)(gan)衣(yi)機(ji)、工業烘干(gan)(gan)(gan)設備(bei)等(deng).?其特點(dian)是(shi)輸出熱(re)(re)(re)風功率大、速熱(re)(re)(re)、安全、能(neng)自動(dong)調節風溫和功耗。
ptc電(dian)(dian)(dian)加(jia)(jia)熱(re)器(qi)(qi)暖風機(ji)采(cai)用強制對(dui)(dui)流(liu)方(fang)式(shi)加(jia)(jia)熱(re)室溫,因為強制對(dui)(dui)流(liu)空(kong)氣的(de)(de)(de)(de)傳(chuan)熱(re)系數(shu)是自然對(dui)(dui)流(liu)的(de)(de)(de)(de)幾十(shi)倍,所以(yi)(yi)傳(chuan)遞同樣熱(re)量所需的(de)(de)(de)(de)換熱(re)面積就可(ke)(ke)以(yi)(yi)小(xiao)(xiao)(xiao)到幾十(shi)分之一(yi),一(yi)個100—120W的(de)(de)(de)(de)ptc電(dian)(dian)(dian)加(jia)(jia)熱(re)器(qi)(qi)組件(jian)可(ke)(ke)以(yi)(yi)作(zuo)到24×15×2.2mm3這樣小(xiao)(xiao)(xiao)的(de)(de)(de)(de)體(ti)積,這正是同等功率(lv)情況下,ptc電(dian)(dian)(dian)加(jia)(jia)熱(re)器(qi)(qi)暖風機(ji)可(ke)(ke)以(yi)(yi)做得小(xiao)(xiao)(xiao)巧輕便(bian)的(de)(de)(de)(de)關鍵所在,它(ta)的(de)(de)(de)(de)體(ti)積和重量可(ke)(ke)以(yi)(yi)小(xiao)(xiao)(xiao)到同功率(lv)電(dian)(dian)(dian)熱(re)油汀(ting)的(de)(de)(de)(de)五分之一(yi)左(zuo)右(you)。老化(hua)(hua)衰(shuai)(shuai)減(jian)(jian)是衡量ptc電(dian)(dian)(dian)加(jia)(jia)熱(re)器(qi)(qi)暖風機(ji)質(zhi)量的(de)(de)(de)(de)較(jiao)主要參數(shu)之一(yi),ptc電(dian)(dian)(dian)加(jia)(jia)熱(re)器(qi)(qi)元(yuan)(yuan)件(jian)使用的(de)(de)(de)(de)前400個小(xiao)(xiao)(xiao)時(shi)老化(hua)(hua)速度較(jiao)快,而后(hou)(hou)日(ri)趨平(ping)(ping)緩,在連續(xu)工作(zuo)1000個小(xiao)(xiao)(xiao)時(shi)后(hou)(hou),好的(de)(de)(de)(de)ptc電(dian)(dian)(dian)加(jia)(jia)熱(re)器(qi)(qi)元(yuan)(yuan)件(jian)輸出功率(lv)約衰(shuai)(shuai)減(jian)(jian)10%左(zuo)右(you),其(qi)后(hou)(hou)趨于平(ping)(ping)穩,這對(dui)(dui)ptc電(dian)(dian)(dian)加(jia)(jia)熱(re)器(qi)(qi)暖風機(ji)的(de)(de)(de)(de)加(jia)(jia)熱(re)功能影響不(bu)大。影響ptc電(dian)(dian)(dian)加(jia)(jia)熱(re)器(qi)(qi)老化(hua)(hua)衰(shuai)(shuai)減(jian)(jian)的(de)(de)(de)(de)因素很(hen)多,居里點偏高是其(qi)主要原因,居里點越(yue)高老化(hua)(hua)越(yue)快,但隨著時(shi)間的(de)(de)(de)(de)推移(yi),老化(hua)(hua)衰(shuai)(shuai)減(jian)(jian)則(ze)很(hen)明顯。
(1)?PTC?加熱片(pian)具有自動恒溫(wen)的特點,不需要溫(wen)度控制系統,將?PTC?加熱片(pian)直接(jie)通電即可。
(?2)?當?PTC?加(jia)熱片用來加(jia)熱液(ye)體(ti)(如水)時,液(ye)體(ti)燒干后,?PTC?加(jia)熱片不會損壞。
(?3)?若?PTC?加(jia)熱(re)片用來加(jia)熱(re)冷風(feng),不送(song)風(feng)時,?PTC?加(jia)熱(re)片不會損壞。
(?4?)使用(yong)壽命(ming)(ming)長,正(zheng)常環境下(xia)使用(yong),壽命(ming)(ming)可達?10?年以上。
(?5?)工(gong)作(zuo)可(ke)靠,利用(yong)?PTC?加熱(re)片內部特(te)性控溫(wen),永遠不會超溫(wen)。
(?6?)工(gong)作電壓非(fei)常(chang)寬:當工(gong)作電壓變化?2?倍時,表面(mian)溫(wen)度的變化非(fei)常(chang)小。
(?7?)多個(ge)?PTC?加熱片一起使用時,應并聯(lian),不可串聯(lian)。
(8)?不同(tong)散(san)熱條件使(shi)得?PTC?加熱片的發(fa)熱功率差別很大。??
(9)?發(fa)熱功(gong)率(lv)在通電后由大(da)到(dao)小,?直到(dao)穩定(ding)。穩定(ding)功(gong)率(lv)與(yu)使用(yong)條件有關,同一件?PTC?發(fa)熱器(qi),使用(yong)條件不(bu)同,則功(gong)率(lv)可能相(xiang)差(cha)?幾倍(bei)。散熱越(yue)快則穩定(ding)功(gong)率(lv)越(yue)大(da);?PTC?的表面溫度越(yue)高則功(gong)率(lv)越(yue)高。
(1)以熱(re)(re)傳(chuan)導(dao)為(wei)主的(de)PTC加(jia)熱(re)(re)器(qi)陶瓷加(jia)熱(re)(re)器(qi).其特點是通過PTC加(jia)熱(re)(re)器(qi)發熱(re)(re)元(yuan)(yuan)件(jian)表面安裝的(de)電(dian)極板(導(dao)電(dian)兼傳(chuan)熱(re)(re))絕緣(yuan)層(隔電(dian)兼傳(chuan)熱(re)(re))導(dao)熱(re)(re)蓄(xu)熱(re)(re)板(有的(de)還(huan)附加(jia)有導(dao)熱(re)(re)膠)等多層傳(chuan)熱(re)(re)結構,把PTC加(jia)熱(re)(re)器(qi)元(yuan)(yuan)件(jian)發出的(de)熱(re)(re)量傳(chuan)到被加(jia)熱(re)(re)的(de)物(wu)體上.
(2)以所形成的(de)熱(re)風進行對流式傳(chuan)熱(re)的(de)各種PTC加熱(re)器陶瓷(ci)熱(re)風器.其特點(dian)是輸(shu)出(chu)功率大,并能自動(dong)調節吹出(chu)風溫和輸(shu)出(chu)熱(re)量.
(3)紅(hong)(hong)外(wai)線(xian)輻射(she)(she)加熱(re)器(qi).其特(te)點實際利用PTC加熱(re)器(qi)元件或(huo)導熱(re)板(ban)表面迅速發出(chu)的(de)熱(re)量直接(jie)或(huo)間接(jie)地激發接(jie)觸其表面的(de)遠紅(hong)(hong)外(wai)涂(tu)料或(huo)遠紅(hong)(hong)外(wai)材料使之輻射(she)(she)出(chu)紅(hong)(hong)外(wai)線(xian),便構成了PTC加熱(re)器(qi)陶瓷紅(hong)(hong)外(wai)輻射(she)(she)加熱(re)器(qi)。??