[高低溫試驗箱]高低溫試驗箱低溫不穩定故障分析排除及解決
[高低溫試驗箱]高(gao)低溫試(shi)驗箱低溫度不穩定故障(zhang)分(fen)析排除及(ji)解(jie)決方(fang)法
故障原(yuan)因:高低(di)(di)溫試驗箱低(di)(di)溫度不(bu)穩定
故障分析:首先觀察高(gao)低溫(wen)箱制(zhi)冷壓(ya)(ya)縮(suo)(suo)機(ji)(ji)在(zai)高(gao)低溫(wen)試驗箱運行過(guo)程中(zhong)是否能(neng)夠啟動(dong),如果高(gao)低溫(wen)箱的壓(ya)(ya)縮(suo)(suo)機(ji)(ji)在(zai)運行過(guo)程中(zhong)都能(neng)夠啟動(dong),說明從主電源到各高(gao)低溫(wen)箱壓(ya)(ya)縮(suo)(suo)機(ji)(ji)的電器(qi)線路都正(zheng)常,電器(qi)系統方面也就沒有問(wen)題(ti)。
當高低(di)溫(wen)箱的電(dian)氣(qi)(qi)系統(tong)都(dou)沒有問題時,則(ze)繼續(xu)檢(jian)(jian)查(cha)制(zhi)冷(leng)系統(tong)。首先(xian)檢(jian)(jian)查(cha)高低(di)溫(wen)箱的兩組(zu)(zu)(zu)制(zhi)冷(leng)壓縮(suo)機組(zu)(zu)(zu),如(ru)果(guo)低(di)溫(wen)(R23)級壓縮(suo)機的排(pai)氣(qi)(qi)和吸(xi)氣(qi)(qi)壓力都(dou)較正常值偏低(di),而且吸(xi)氣(qi)(qi)壓力呈抽空(kong)狀(zhuang)態,這(zhe)就說(shuo)明(ming)主制(zhi)冷(leng)機組(zu)(zu)(zu)的制(zhi)冷(leng)劑量明(ming)顯不(bu)足。再(zai)用手(shou)摸一下高低(di)溫(wen)箱的主機組(zu)(zu)(zu)R23壓縮(suo)機的排(pai)氣(qi)(qi)和吸(xi)氣(qi)(qi)管路(lu),如(ru)發現排(pai)氣(qi)(qi)管路(lu)的溫(wen)度不(bu)高,吸(xi)氣(qi)(qi)管路(lu)的溫(wen)度也不(bu)低(di)(未結霜),這(zhe)也說(shuo)明(ming)了主機組(zu)(zu)(zu)的R23制(zhi)冷(leng)劑的缺(que)乏。
高(gao)低(di)溫(wen)(wen)(wen)(wen)試(shi)驗箱(xiang)的(de)(de)一個為(wei)主(zhu)(zhu)機組(zu),另一個為(wei)輔助(zhu)(zhu)機組(zu),在(zai)(zai)降溫(wen)(wen)(wen)(wen)速率(lv)較大時(shi),兩組(zu)機組(zu)同時(shi)工(gong)(gong)作(zuo),在(zai)(zai)溫(wen)(wen)(wen)(wen)度保(bao)持階段初期,兩組(zu)機組(zu)依然(ran)同時(shi)工(gong)(gong)作(zuo)。待(dai)溫(wen)(wen)(wen)(wen)度初步穩定下來,輔助(zhu)(zhu)機組(zu)就(jiu)停(ting)止(zhi)工(gong)(gong)作(zuo),由(you)主(zhu)(zhu)機組(zu)來維(wei)持溫(wen)(wen)(wen)(wen)度的(de)(de)降溫(wen)(wen)(wen)(wen)及穩定。如果主(zhu)(zhu)機組(zu)R23泄露,會使主(zhu)(zhu)機組(zu)的(de)(de)制冷(leng)效果不(bu)大,由(you)于(yu)降溫(wen)(wen)(wen)(wen)過程中,兩機組(zu)同時(shi)工(gong)(gong)作(zuo),故(gu)沒有溫(wen)(wen)(wen)(wen)度穩定不(bu)住(zhu)的(de)(de)現(xian)象,而指(zhi)示(shi)降溫(wen)(wen)(wen)(wen)速率(lv)降低(di)。在(zai)(zai)溫(wen)(wen)(wen)(wen)度保(bao)持階段,一旦輔助(zhu)(zhu)機組(zu)停(ting)止(zhi)工(gong)(gong)作(zuo),主(zhu)(zhu)機組(zu)又(you)無制冷(leng)作(zuo)用,高(gao)低(di)溫(wen)(wen)(wen)(wen)試(shi)驗箱(xiang)內(nei)的(de)(de)空氣溫(wen)(wen)(wen)(wen)度就(jiu)會緩慢(man)上升,當溫(wen)(wen)(wen)(wen)度上升到一定程度,控制系統(tong)就(jiu)會又(you)啟動輔助(zhu)(zhu)機組(zu)來降溫(wen)(wen)(wen)(wen),然(ran)后輔助(zhu)(zhu)機組(zu)又(you)停(ting)止(zhi)工(gong)(gong)作(zuo),如此反復,便會出(chu)現(xian)低(di)溫(wen)(wen)(wen)(wen)度保(bao)持不(bu)住(zhu)的(de)(de)故(gu)障現(xian)象。
至(zhi)此,已(yi)確認高低溫(wen)箱的(de)故障原因是主(zhu)制冷(leng)機組(zu)的(de)低溫(wen)(R23)級機組(zu)的(de)制冷(leng)劑R23泄(xie)漏。 高低溫(wen)試驗箱維修方(fang)法:對高低溫(wen)試驗箱的(de)制冷(leng)系統(tong)進行查漏,用(yong)檢(jian)漏儀和肥(fei)皂水相結合的(de)方(fang)法來(lai)檢(jian)查漏點在哪,如果(guo)發現是熱氣旁(pang)通電(dian)磁閥(fa)(fa)的(de)閥(fa)(fa)桿裂了有細縫,則更換此電(dian)磁閥(fa)(fa),如發現其它地方(fang)的(de)泄(xie)漏,則用(yong)氧(yang)焊(han)將(jiang)泄(xie)漏處補焊(han)完整(zheng),再對系統(tong)重(zhong)新(xin)充氟,系統(tong)運(yun)行即可恢復(fu)正常。
經上文可以看(kan)出,對高(gao)(gao)低(di)溫(wen)試(shi)(shi)驗(yan)(yan)(yan)箱低(di)溫(wen)度(du)保持(chi)不住的(de)(de)(de)故障(zhang)現(xian)象,分析和(he)(he)判斷基本上是(shi)從易到(dao)難,先外后(hou)里(li),先電氣后(hou)冷氣的(de)(de)(de)方式進行(xing)分析和(he)(he)判斷,熟(shu)悉(xi)和(he)(he)了解(jie)高(gao)(gao)低(di)溫(wen)試(shi)(shi)驗(yan)(yan)(yan)箱的(de)(de)(de)原(yuan)(yuan)理和(he)(he)工作(zuo)過(guo)程則(ze)是(shi)分析故障(zhang)判斷故障(zhang)的(de)(de)(de)基礎。只有深入了解(jie)高(gao)(gao)低(di)溫(wen)試(shi)(shi)驗(yan)(yan)(yan)箱的(de)(de)(de)工作(zuo)原(yuan)(yuan)理和(he)(he)工作(zuo)過(guo)程,才能迅速地解(jie)決高(gao)(gao)低(di)溫(wen)試(shi)(shi)驗(yan)(yan)(yan)箱在運行(xing)過(guo)程中出現(xian)的(de)(de)(de)各種問題。
常見(jian)故障的解(jie)決辦法有哪些?
工程師專業為您解(jie)答:高(gao)低(di)溫(wen)(wen)(wen)試(shi)驗(yan)箱屬于環境類測(ce)試(shi)儀器。它適用(yong)(yong)于高(gao)溫(wen)(wen)(wen),低(di)溫(wen)(wen)(wen),濕(shi)度(du)(du)試(shi)驗(yan),測(ce)試(shi)電子電工,LED,化工,橡塑(su)膠等(deng)產(chan)(chan)品的可靠(kao)性能(neng),提高(gao)產(chan)(chan)品質量。但是在運(yun)行過(guo)程中,如果遇到(dao)高(gao)低(di)溫(wen)(wen)(wen)試(shi)驗(yan)箱溫(wen)(wen)(wen)度(du)(du)達不到(dao)溫(wen)(wen)(wen)度(du)(du)指標、低(di)溫(wen)(wen)(wen)降溫(wen)(wen)(wen)慢、濕(shi)度(du)(du)不能(neng)按照預定運(yun)行三(san)大故障,經(jing)過(guo)多(duo)年的技術研發結合實踐的經(jing)驗(yan),以下就如何解(jie)決處理高(gao)低(di)溫(wen)(wen)(wen)試(shi)驗(yan)箱的常見故障詳細分(fen)析,以供使(shi)用(yong)(yong)高(gao)低(di)溫(wen)(wen)(wen)試(shi)驗(yan)箱用(yong)(yong)戶參考借(jie)鑒。希望能(neng)幫(bang)助(zhu)客戶日常的維護及保(bao)養。
一、如何解(jie)決高(gao)低(di)溫(wen)試(shi)驗箱低(di)溫(wen)達不(bu)到試(shi)驗的指標(biao)?
高(gao)低溫試(shi)驗(yan)(yan)箱(xiang)低溫達(da)不到(dao)指標,降(jiang)溫很(hen)慢(man)那你就要(yao)觀察(cha)溫度(du)(du)的(de)(de)變化(hua),是(shi)(shi)(shi)溫度(du)(du)降(jiang)的(de)(de)很(hen)慢(man),還是(shi)(shi)(shi)溫度(du)(du)到(dao)一(yi)定值后(hou)溫度(du)(du)有(you)回升的(de)(de)趨勢(shi),前(qian)者就要(yao)檢查(cha)一(yi)下,做低溫試(shi)驗(yan)(yan)前(qian)是(shi)(shi)(shi)否將(jiang)工(gong)(gong)作(zuo)室(shi)烘干(gan),使(shi)工(gong)(gong)作(zuo)室(shi)保持干(gan)燥(zao)后(hou)再將(jiang)試(shi)驗(yan)(yan)樣品(pin)放入工(gong)(gong)作(zuo)室(shi)內再做試(shi)驗(yan)(yan),工(gong)(gong)作(zuo)室(shi)內的(de)(de)試(shi)驗(yan)(yan)樣品(pin)是(shi)(shi)(shi)否放置(zhi)的(de)(de)過多,使(shi)工(gong)(gong)作(zuo)室(shi)內的(de)(de)風不能充分循環,在(zai)排除上述原因后(hou),就要(yao)考慮是(shi)(shi)(shi)否是(shi)(shi)(shi)制冷系統中(zhong)的(de)(de)故(gu)障了(le),這樣就要(yao)請廠家的(de)(de)專業(ye)人員進行檢修。后(hou)者的(de)(de)現(xian)象是(shi)(shi)(shi)高(gao)低溫試(shi)驗(yan)(yan)箱(xiang)設備(bei)(bei)的(de)(de)使(shi)用(yong)環境不好(hao)所致,設備(bei)(bei)放置(zhi)的(de)(de)環境溫度(du)(du),放置(zhi)的(de)(de)位置(zhi)(箱(xiang)體后(hou)與墻的(de)(de)距(ju)離)要(yao)滿足要(yao)求(在(zai)設備(bei)(bei)操(cao)作(zuo)使(shi)用(yong)說(shuo)明中(zhong)都有(you)規(gui)定)。
二、如(ru)何(he)解(jie)決高低溫試(shi)驗箱在運行(xing)過程中,溫度變化達不到試(shi)驗溫度值?
在高溫(wen)(wen)試驗中(zhong),如(ru)溫(wen)(wen)度變化達(da)不到(dao)試驗溫(wen)(wen)度值時,可(ke)以檢查電器系(xi)統(tong),逐(zhu)一排(pai)除故(gu)障(zhang)。如(ru)高低溫(wen)(wen)試驗箱溫(wen)(wen)度升得很慢,就要(yao)查看風循(xun)環系(xi)統(tong),看一下風循(xun)環的(de)調(diao)節擋板是否(fou)開啟正(zheng)常,反之,就檢查風循(xun)環的(de)電機運轉(zhuan)是否(fou)正(zheng)常。如(ru)溫(wen)(wen)度過沖厲害那(nei)么(me)就需要(yao)整定PID的(de)設置參數(shu)。如(ru)果溫(wen)(wen)度直接上升,過溫(wen)(wen)保(bao)護(hu),那(nei)么(me)控制器出故(gu)障(zhang),須更換控制儀表。
三、高低溫(wen)試驗箱在濕(shi)熱(re)試驗過(guo)程中,濕(shi)度(du)達不到指定要求,是哪里出現問題?
高低(di)溫試(shi)(shi)驗(yan)(yan)(yan)箱在做(zuo)濕(shi)熱試(shi)(shi)驗(yan)(yan)(yan)中(zhong),出(chu)現實(shi)(shi)際濕(shi)度(du)(du)會達到100%或(huo)者實(shi)(shi)際濕(shi)度(du)(du)與目標濕(shi)度(du)(du)相(xiang)差很大,數值低(di)得(de)很多,前者的(de)(de)(de)現象(xiang):可(ke)(ke)能是(shi)(shi)濕(shi)球(qiu)傳感(gan)器(qi)上(shang)的(de)(de)(de)紗(sha)布干燥引(yin)起(qi),那(nei)就要(yao)檢查(cha)濕(shi)球(qiu)傳感(gan)器(qi)的(de)(de)(de)水(shui)槽中(zhong)是(shi)(shi)否(fou)缺水(shui),水(shui)槽中(zhong)的(de)(de)(de)水(shui)位(wei)(wei)(wei)(wei)是(shi)(shi)由一水(shui)位(wei)(wei)(wei)(wei)控制(zhi)(zhi)(zhi)(zhi)器(qi)自動控制(zhi)(zhi)(zhi)(zhi)的(de)(de)(de),查(cha)水(shui)位(wei)(wei)(wei)(wei)控制(zhi)(zhi)(zhi)(zhi)器(qi)供(gong)水(shui)系(xi)(xi)(xi)統(tong)是(shi)(shi)否(fou)供(gong)水(shui)正(zheng)常,水(shui)位(wei)(wei)(wei)(wei)控制(zhi)(zhi)(zhi)(zhi)器(qi)工作是(shi)(shi)否(fou)正(zheng)常。另一種可(ke)(ke)能就是(shi)(shi)濕(shi)球(qiu)紗(sha)布因(yin)(yin)使(shi)用(yong)時間(jian)長,或(huo)供(gong)水(shui)水(shui)質純凈(jing)度(du)(du)的(de)(de)(de)原因(yin)(yin),會使(shi)紗(sha)布變硬,使(shi)紗(sha)布無法吸收水(shui)份而干燥,只(zhi)要(yao)更換(huan)或(huo)清洗紗(sha)布即(ji)可(ke)(ke)排除(chu)以(yi)(yi)上(shang)現象(xiang)。后者的(de)(de)(de)現象(xiang)主要(yao)是(shi)(shi)高低(di)溫試(shi)(shi)驗(yan)(yan)(yan)箱的(de)(de)(de)加濕(shi)系(xi)(xi)(xi)統(tong)不工作,查(cha)看加濕(shi)系(xi)(xi)(xi)統(tong)的(de)(de)(de)供(gong)水(shui)系(xi)(xi)(xi)統(tong),供(gong)水(shui)系(xi)(xi)(xi)統(tong)內是(shi)(shi)否(fou)有一定的(de)(de)(de)水(shui)量,控制(zhi)(zhi)(zhi)(zhi)加濕(shi)鍋(guo)爐(lu)水(shui)位(wei)(wei)(wei)(wei)的(de)(de)(de)水(shui)位(wei)(wei)(wei)(wei)控制(zhi)(zhi)(zhi)(zhi)是(shi)(shi)否(fou)正(zheng)常,加濕(shi)鍋(guo)爐(lu)內的(de)(de)(de)水(shui)位(wei)(wei)(wei)(wei)是(shi)(shi)否(fou)正(zheng)常。如(ru)以(yi)(yi)上(shang)一切都正(zheng)常,那(nei)就要(yao)檢查(cha)電器(qi)控制(zhi)(zhi)(zhi)(zhi)系(xi)(xi)(xi)統(tong),請專業維(wei)(wei)修(xiu)人員進行檢修(xiu)。高低(di)溫試(shi)(shi)驗(yan)(yan)(yan)箱,因(yin)(yin)為有使(shi)用(yong)時限,所以(yi)(yi)運行時間(jian)超長的(de)(de)(de)高低(di)溫試(shi)(shi)驗(yan)(yan)(yan)箱,難免(mian)會出(chu)現一些(xie)各(ge)種各(ge)樣的(de)(de)(de)小故(gu)障,平時注意(yi)定期保養和維(wei)(wei)護,一般都可(ke)(ke)以(yi)(yi)大部分避免(mian)。
廣東劍喬試(shi)驗(yan)(yan)(yan)設(she)備(bei)有限(xian)公司(si)是專注于振(zhen)動及環境試(shi)驗(yan)(yan)(yan)設(she)備(bei)研發、生產(chan)(chan)、銷售(shou)大型生產(chan)(chan)廠家,主營產(chan)(chan)品(pin):振(zhen)動臺(tai)、振(zhen)動試(shi)驗(yan)(yan)(yan)機(ji)、振(zhen)動試(shi)驗(yan)(yan)(yan)臺(tai)、沖(chong)擊(ji)試(shi)驗(yan)(yan)(yan)臺(tai)、沖(chong)擊(ji)試(shi)驗(yan)(yan)(yan)機(ji)、老化(hua)房、恒溫(wen)(wen)恒濕(shi)試(shi)驗(yan)(yan)(yan)室、恒溫(wen)(wen)恒濕(shi)機(ji)、快(kuai)速(su)溫(wen)(wen)變試(shi)驗(yan)(yan)(yan)箱(xiang)(xiang)、高(gao)低(di)溫(wen)(wen)試(shi)驗(yan)(yan)(yan)箱(xiang)(xiang)、冷熱沖(chong)擊(ji)試(shi)驗(yan)(yan)(yan)箱(xiang)(xiang)、冷熱沖(chong)擊(ji)箱(xiang)(xiang)、恒溫(wen)(wen)恒濕(shi)箱(xiang)(xiang)、恒溫(wen)(wen)恒濕(shi)試(shi)驗(yan)(yan)(yan)箱(xiang)(xiang)等(deng)產(chan)(chan)品(pin)。