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風冷式工業冷水機故障怎么辦?風冷式工業冷水機應該怎么檢修?

來源:深圳市辛普森制冷技術有限公司     發布時間:2020-09-04     瀏覽:1146 次  

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  風冷式工業冷水機故障怎么辦?風冷式工業冷水機應該怎么檢修?
  風冷式工業冷水機故障:壓縮機排氣壓力過高,導致高壓保護繼電器動作。壓縮機排氣壓力反映冷凝壓力,正常值為1.4 ~ 1.6兆帕,保護值為2.0兆帕。如果壓力長期過高,會導致壓縮機運行電流過大,容易燒毀電機,損壞壓縮機出口閥板。風冷式工業冷水機高壓故障的原因如下:
  冷卻(que)(que)(que)(que)水(shui)(shui)(shui)(shui)(shui)(shui)(shui)溫度(du)偏高(gao)(gao),導致(zhi)冷凝(ning)(ning)效(xiao)果不(bu)(bu)(bu)佳(jia)。冷卻(que)(que)(que)(que)器(qi)(qi)需要額(e)定(ding)溫度(du)為30~35的(de)(de)冷卻(que)(que)(que)(que)水(shui)(shui)(shui)(shui)(shui)(shui)(shui)。水(shui)(shui)(shui)(shui)(shui)(shui)(shui)溫高(gao)(gao),散熱差(cha)(cha),不(bu)(bu)(bu)可避免地會(hui)導致(zhi)冷凝(ning)(ning)壓(ya)力高(gao)(gao),這(zhe)種情況經常發生在高(gao)(gao)溫季(ji)節。水(shui)(shui)(shui)(shui)(shui)(shui)(shui)溫高(gao)(gao)的(de)(de)原因可能是:冷卻(que)(que)(que)(que)塔故障(zhang),如風機(ji)不(bu)(bu)(bu)開甚至反(fan)轉(zhuan),布水(shui)(shui)(shui)(shui)(shui)(shui)(shui)器(qi)(qi)不(bu)(bu)(bu)轉(zhuan),說明(ming)冷卻(que)(que)(que)(que)水(shui)(shui)(shui)(shui)(shui)(shui)(shui)溫度(du)很(hen)高(gao)(gao),上升很(hen)快;外部空(kong)氣(qi)溫度(du)高(gao)(gao),水(shui)(shui)(shui)(shui)(shui)(shui)(shui)路短,可回收(shou)的(de)(de)水(shui)(shui)(shui)(shui)(shui)(shui)(shui)量(liang)少。在這(zhe)種情況下,冷卻(que)(que)(que)(que)水(shui)(shui)(shui)(shui)(shui)(shui)(shui)溫度(du)通(tong)(tong)常保持在高(gao)(gao)水(shui)(shui)(shui)(shui)(shui)(shui)(shui)平,這(zhe)可以通(tong)(tong)過增加儲水(shui)(shui)(shui)(shui)(shui)(shui)(shui)箱來解決。冷卻(que)(que)(que)(que)水(shui)(shui)(shui)(shui)(shui)(shui)(shui)流量(liang)不(bu)(bu)(bu)足,達不(bu)(bu)(bu)到額(e)定(ding)水(shui)(shui)(shui)(shui)(shui)(shui)(shui)流量(liang)。主要表(biao)現為機(ji)組進(jin)出(chu)口水(shui)(shui)(shui)(shui)(shui)(shui)(shui)壓(ya)差(cha)(cha)減小(與(yu)系統(tong)運行(xing)初(chu)期(qi)(qi)的(de)(de)水(shui)(shui)(shui)(shui)(shui)(shui)(shui)壓(ya)差(cha)(cha)相比),溫差(cha)(cha)增大(da)。水(shui)(shui)(shui)(shui)(shui)(shui)(shui)流不(bu)(bu)(bu)足的(de)(de)原因是系統(tong)缺水(shui)(shui)(shui)(shui)(shui)(shui)(shui)或空(kong)氣(qi)不(bu)(bu)(bu)足,解決辦法是在排氣(qi)管道(dao)的(de)(de)高(gao)(gao)度(du)安裝(zhuang)一個(ge)排氣(qi)閥;管道(dao)過濾(lv)器(qi)(qi)堵(du)塞(sai)或選(xuan)擇過細,透水(shui)(shui)(shui)(shui)(shui)(shui)(shui)性(xing)有(you)限。應選(xuan)擇合適的(de)(de)過濾(lv)器(qi)(qi),并定(ding)期(qi)(qi)清(qing)潔濾(lv)網;水(shui)(shui)(shui)(shui)(shui)(shui)(shui)泵(beng)很(hen)小,與(yu)系統(tong)不(bu)(bu)(bu)匹(pi)配。冷凝(ning)(ning)器(qi)(qi)結垢(gou)或堵(du)塞(sai)。一般來說,自來水(shui)(shui)(shui)(shui)(shui)(shui)(shui)用于(yu)冷凝(ning)(ning)水(shui)(shui)(shui)(shui)(shui)(shui)(shui),當溫度(du)超過30時,冷凝(ning)(ning)水(shui)(shui)(shui)(shui)(shui)(shui)(shui)容易結垢(gou)。此(ci)外,由于(yu)冷卻(que)(que)(que)(que)塔是開放式的(de)(de),直接暴(bao)露在空(kong)氣(qi)中(zhong),灰塵和(he)(he)異物很(hen)容易進(jin)入冷卻(que)(que)(que)(que)水(shui)(shui)(shui)(shui)(shui)(shui)(shui)系統(tong),造(zao)成冷凝(ning)(ning)器(qi)(qi)臟污堵(du)塞(sai),換熱面(mian)積(ji)小,效(xiao)率低,還(huan)會(hui)影響(xiang)水(shui)(shui)(shui)(shui)(shui)(shui)(shui)的(de)(de)流量(liang)。其性(xing)能是機(ji)組進(jin)出(chu)口水(shui)(shui)(shui)(shui)(shui)(shui)(shui)的(de)(de)壓(ya)差(cha)(cha)和(he)(he)溫差(cha)(cha)變大(da),手觸摸冷凝(ning)(ning)器(qi)(qi)上下溫度(du)很(hen)高(gao)(gao),冷凝(ning)(ning)器(qi)(qi)出(chu)口銅管發熱。該(gai)裝(zhuang)置(zhi)應定(ding)期(qi)(qi)進(jin)行(xing)反(fan)沖洗(xi),必要時進(jin)行(xing)化學(xue)清(qing)洗(xi)和(he)(he)除垢(gou)。

風冷式工業冷水機

  制冷(leng)劑過(guo)量。這(zhe)(zhe)(zhe)種(zhong)情(qing)況(kuang)通(tong)常發生在(zai)維修后(hou),這(zhe)(zhe)(zhe)表明(ming)吸(xi)(xi)入(ru)和(he)排(pai)(pai)出壓(ya)(ya)(ya)力(li)(li)以及平(ping)(ping)衡壓(ya)(ya)(ya)力(li)(li)都偏高,壓(ya)(ya)(ya)縮機運行電(dian)(dian)流也偏高。在(zai)額定(ding)工作(zuo)條件(jian)下,根據吸(xi)(xi)氣(qi)和(he)排(pai)(pai)氣(qi)壓(ya)(ya)(ya)力(li)(li)、平(ping)(ping)衡壓(ya)(ya)(ya)力(li)(li)和(he)工作(zuo)電(dian)(dian)流放(fang)氣(qi),直到正常為止。制冷(leng)劑與(yu)空(kong)氣(qi)和(he)氮氣(qi)等(deng)不可(ke)冷(leng)凝的(de)氣(qi)體混合(he)。這(zhe)(zhe)(zhe)種(zhong)情(qing)況(kuang)通(tong)常發生在(zai)維護之后(hou),并且抽真空(kong)沒有完成。它只能排(pai)(pai)干,再次抽真空(kong),并重(zhong)新(xin)注入(ru)制冷(leng)劑。電(dian)(dian)氣(qi)故障(zhang)(zhang)引起的(de)誤報警。由(you)于潮濕、高壓(ya)(ya)(ya)保護繼電(dian)(dian)器接(jie)觸不良或(huo)損壞(huai)、單元(yuan)電(dian)(dian)子板(ban)潮濕或(huo)損壞(huai),通(tong)信故障(zhang)(zhang)導致(zhi)誤報警。在(zai)這(zhe)(zhe)(zhe)種(zhong)假故障(zhang)(zhang)中,電(dian)(dian)子板(ban)上的(de)高壓(ya)(ya)(ya)故障(zhang)(zhang)指示(shi)燈不亮或(huo)微亮,高壓(ya)(ya)(ya)保護繼電(dian)(dian)器手動復位(wei)無效,計(ji)算機顯示(shi)“高壓(ya)(ya)(ya)復位(wei)”,或(huo)自動消失,測(ce)得的(de)壓(ya)(ya)(ya)縮機運行電(dian)(dian)流正常,吸(xi)(xi)排(pai)(pai)氣(qi)壓(ya)(ya)(ya)力(li)(li)也正常。
  工業冷(leng)(leng)(leng)(leng)(leng)水(shui)(shui)(shui)(shui)(shui)機(ji)(ji)(ji)組(zu)(zu)低(di)(di)(di)壓(ya)(ya)(ya)(ya)(ya)(ya)(ya)故(gu)(gu)(gu)障(zhang):壓(ya)(ya)(ya)(ya)(ya)(ya)(ya)縮(suo)(suo)機(ji)(ji)(ji)吸(xi)入(ru)(ru)壓(ya)(ya)(ya)(ya)(ya)(ya)(ya)力(li)(li)(li)(li)過(guo)(guo)低(di)(di)(di),導(dao)致低(di)(di)(di)壓(ya)(ya)(ya)(ya)(ya)(ya)(ya)保(bao)護(hu)繼(ji)電(dian)(dian)器(qi)動作(zuo)。壓(ya)(ya)(ya)(ya)(ya)(ya)(ya)縮(suo)(suo)機(ji)(ji)(ji)的(de)(de)(de)(de)(de)吸(xi)入(ru)(ru)壓(ya)(ya)(ya)(ya)(ya)(ya)(ya)力(li)(li)(li)(li)反映了(le)蒸發(fa)壓(ya)(ya)(ya)(ya)(ya)(ya)(ya)力(li)(li)(li)(li),正常(chang)(chang)(chang)值為0.4 ~ 0.6兆(zhao)(zhao)帕(pa),保(bao)護(hu)值為0.2兆(zhao)(zhao)帕(pa)。如果吸(xi)入(ru)(ru)壓(ya)(ya)(ya)(ya)(ya)(ya)(ya)力(li)(li)(li)(li)低(di)(di)(di),回風(feng)量(liang)就會(hui)(hui)少,制(zhi)冷(leng)(leng)(leng)(leng)(leng)量(liang)就會(hui)(hui)不(bu)足,造成電(dian)(dian)能(neng)(neng)的(de)(de)(de)(de)(de)浪(lang)費(fei)。由回風(feng)冷(leng)(leng)(leng)(leng)(leng)卻(que)的(de)(de)(de)(de)(de)壓(ya)(ya)(ya)(ya)(ya)(ya)(ya)縮(suo)(suo)機(ji)(ji)(ji)電(dian)(dian)機(ji)(ji)(ji)散(san)熱(re)(re)不(bu)好,容(rong)易損(sun)壞(huai)電(dian)(dian)機(ji)(ji)(ji)。低(di)(di)(di)壓(ya)(ya)(ya)(ya)(ya)(ya)(ya)故(gu)(gu)(gu)障(zhang)的(de)(de)(de)(de)(de)原(yuan)因如下(xia)(xia):制(zhi)冷(leng)(leng)(leng)(leng)(leng)劑(ji)(ji)(ji)不(bu)足或(huo)(huo)泄漏(lou)。如果制(zhi)冷(leng)(leng)(leng)(leng)(leng)劑(ji)(ji)(ji)不(bu)足且僅(jin)部分泄漏(lou),停機(ji)(ji)(ji)時(shi)平(ping)衡(heng)壓(ya)(ya)(ya)(ya)(ya)(ya)(ya)力(li)(li)(li)(li)可(ke)能(neng)(neng)較(jiao)(jiao)高,而啟動后(hou)吸(xi)入(ru)(ru)壓(ya)(ya)(ya)(ya)(ya)(ya)(ya)力(li)(li)(li)(li)和(he)排出(chu)(chu)壓(ya)(ya)(ya)(ya)(ya)(ya)(ya)力(li)(li)(li)(li)較(jiao)(jiao)低(di)(di)(di),壓(ya)(ya)(ya)(ya)(ya)(ya)(ya)縮(suo)(suo)機(ji)(ji)(ji)運(yun)(yun)(yun)行電(dian)(dian)流(liu)(liu)較(jiao)(jiao)小(xiao)(xiao),如果運(yun)(yun)(yun)行時(shi)間(jian)(jian)(jian)較(jiao)(jiao)短,將報(bao)告(gao)低(di)(di)(di)壓(ya)(ya)(ya)(ya)(ya)(ya)(ya)故(gu)(gu)(gu)障(zhang)。計(ji)算機(ji)(ji)(ji)顯(xian)示“低(di)(di)(di)壓(ya)(ya)(ya)(ya)(ya)(ya)(ya)電(dian)(dian)流(liu)(liu)”,同時(shi)單元電(dian)(dian)子板(ban)(ban)的(de)(de)(de)(de)(de)低(di)(di)(di)壓(ya)(ya)(ya)(ya)(ya)(ya)(ya)故(gu)(gu)(gu)障(zhang)指示燈亮(liang)起(qi)。幾秒鐘后(hou),計(ji)算機(ji)(ji)(ji)顯(xian)示“低(di)(di)(di)壓(ya)(ya)(ya)(ya)(ya)(ya)(ya)復位”,單元電(dian)(dian)子板(ban)(ban)的(de)(de)(de)(de)(de)低(di)(di)(di)壓(ya)(ya)(ya)(ya)(ya)(ya)(ya)故(gu)(gu)(gu)障(zhang)指示燈熄滅。如果大部分制(zhi)冷(leng)(leng)(leng)(leng)(leng)劑(ji)(ji)(ji)泄漏(lou),平(ping)衡(heng)壓(ya)(ya)(ya)(ya)(ya)(ya)(ya)力(li)(li)(li)(li)非(fei)常(chang)(chang)(chang)低(di)(di)(di),啟動后(hou)會(hui)(hui)立(li)即(ji)報(bao)告(gao)低(di)(di)(di)壓(ya)(ya)(ya)(ya)(ya)(ya)(ya)故(gu)(gu)(gu)障(zhang)。如果吸(xi)入(ru)(ru)壓(ya)(ya)(ya)(ya)(ya)(ya)(ya)力(li)(li)(li)(li)低(di)(di)(di)于0.2兆(zhao)(zhao)帕(pa),則不(bu)能(neng)(neng)啟動,計(ji)算機(ji)(ji)(ji)顯(xian)示“低(di)(di)(di)壓(ya)(ya)(ya)(ya)(ya)(ya)(ya)電(dian)(dian)流(liu)(liu)”,機(ji)(ji)(ji)組(zu)(zu)電(dian)(dian)子板(ban)(ban)低(di)(di)(di)壓(ya)(ya)(ya)(ya)(ya)(ya)(ya)故(gu)(gu)(gu)障(zhang)指示燈亮(liang)。另一(yi)種可(ke)能(neng)(neng)是制(zhi)冷(leng)(leng)(leng)(leng)(leng)劑(ji)(ji)(ji)充足,但(dan)膨(peng)脹閥(fa)(fa)太小(xiao)(xiao)或(huo)(huo)堵(du)塞(sai)(或(huo)(huo)制(zhi)冷(leng)(leng)(leng)(leng)(leng)劑(ji)(ji)(ji)管道不(bu)通(tong)(tong)暢),這也(ye)(ye)可(ke)能(neng)(neng)導(dao)致低(di)(di)(di)壓(ya)(ya)(ya)(ya)(ya)(ya)(ya)故(gu)(gu)(gu)障(zhang)。在(zai)(zai)(zai)這種情(qing)況(kuang)下(xia)(xia),平(ping)衡(heng)壓(ya)(ya)(ya)(ya)(ya)(ya)(ya)力(li)(li)(li)(li)往往很(hen)高,但(dan)吸(xi)入(ru)(ru)壓(ya)(ya)(ya)(ya)(ya)(ya)(ya)力(li)(li)(li)(li)很(hen)低(di)(di)(di),排出(chu)(chu)壓(ya)(ya)(ya)(ya)(ya)(ya)(ya)力(li)(li)(li)(li)很(hen)高,壓(ya)(ya)(ya)(ya)(ya)(ya)(ya)縮(suo)(suo)機(ji)(ji)(ji)運(yun)(yun)(yun)行電(dian)(dian)流(liu)(liu)也(ye)(ye)很(hen)大,閥(fa)(fa)門溫度(du)也(ye)(ye)很(hen)低(di)(di)(di),膨(peng)脹閥(fa)(fa)結(jie)霜(shuang),停機(ji)(ji)(ji)后(hou)壓(ya)(ya)(ya)(ya)(ya)(ya)(ya)力(li)(li)(li)(li)可(ke)以長(chang)時(shi)間(jian)(jian)(jian)恢(hui)復平(ping)衡(heng)。這種情(qing)況(kuang)通(tong)(tong)常(chang)(chang)(chang)發(fa)生在(zai)(zai)(zai)每年的(de)(de)(de)(de)(de)低(di)(di)(di)溫期或(huo)(huo)運(yun)(yun)(yun)行初(chu)期,運(yun)(yun)(yun)行一(yi)段時(shi)間(jian)(jian)(jian)后(hou)可(ke)以恢(hui)復正常(chang)(chang)(chang)。制(zhi)冷(leng)(leng)(leng)(leng)(leng)劑(ji)(ji)(ji)水(shui)(shui)(shui)(shui)(shui)流(liu)(liu)量(liang)不(bu)足,吸(xi)收(shou)熱(re)(re)量(liang)少,制(zhi)冷(leng)(leng)(leng)(leng)(leng)劑(ji)(ji)(ji)蒸發(fa)效(xiao)果差(cha)(cha),為過(guo)(guo)冷(leng)(leng)(leng)(leng)(leng)過(guo)(guo)飽和(he)蒸汽,易產生濕(shi)壓(ya)(ya)(ya)(ya)(ya)(ya)(ya)縮(suo)(suo),表(biao)明(ming)機(ji)(ji)(ji)組(zu)(zu)進出(chu)(chu)口水(shui)(shui)(shui)(shui)(shui)壓(ya)(ya)(ya)(ya)(ya)(ya)(ya)差(cha)(cha)變小(xiao)(xiao),溫差(cha)(cha)變大,吸(xi)入(ru)(ru)溫度(du)低(di)(di)(di),吸(xi)入(ru)(ru)口結(jie)霜(shuang)。水(shui)(shui)(shui)(shui)(shui)流(liu)(liu)量(liang)不(bu)足的(de)(de)(de)(de)(de)原(yuan)因是:系統中(zhong)有空(kong)氣(qi)或(huo)(huo)水(shui)(shui)(shui)(shui)(shui)短缺,解決(jue)辦法(fa)是在(zai)(zai)(zai)排氣(qi)管道的(de)(de)(de)(de)(de)高度(du)安裝一(yi)個排氣(qi)閥(fa)(fa);管道過(guo)(guo)濾器(qi)堵(du)塞(sai)或(huo)(huo)選(xuan)(xuan)擇過(guo)(guo)細,透水(shui)(shui)(shui)(shui)(shui)性有限。應(ying)選(xuan)(xuan)擇合適(shi)的(de)(de)(de)(de)(de)過(guo)(guo)濾器(qi),并定(ding)期清潔濾網;選(xuan)(xuan)擇與(yu)(yu)系統不(bu)兼容(rong)的(de)(de)(de)(de)(de)較(jiao)(jiao)小(xiao)(xiao)的(de)(de)(de)(de)(de)泵(beng)(beng)。選(xuan)(xuan)擇較(jiao)(jiao)大的(de)(de)(de)(de)(de)泵(beng)(beng),或(huo)(huo)啟用備用泵(beng)(beng)。蒸發(fa)器(qi)堵(du)塞(sai),熱(re)(re)交換差(cha)(cha),制(zhi)冷(leng)(leng)(leng)(leng)(leng)劑(ji)(ji)(ji)不(bu)能(neng)(neng)蒸發(fa)。其危(wei)害與(yu)(yu)缺水(shui)(shui)(shui)(shui)(shui)相同,但(dan)不(bu)同的(de)(de)(de)(de)(de)是進水(shui)(shui)(shui)(shui)(shui)和(he)出(chu)(chu)水(shui)(shui)(shui)(shui)(shui)的(de)(de)(de)(de)(de)壓(ya)(ya)(ya)(ya)(ya)(ya)(ya)差(cha)(cha)變大,吸(xi)入(ru)(ru)口也(ye)(ye)會(hui)(hui)結(jie)霜(shuang)。因此,機(ji)(ji)(ji)組(zu)(zu)應(ying)定(ding)期反沖洗。電(dian)(dian)氣(qi)故(gu)(gu)(gu)障(zhang)引起(qi)的(de)(de)(de)(de)(de)誤(wu)報(bao)警。潮(chao)濕(shi)短路、低(di)(di)(di)壓(ya)(ya)(ya)(ya)(ya)(ya)(ya)保(bao)護(hu)繼(ji)電(dian)(dian)器(qi)接觸不(bu)良或(huo)(huo)損(sun)壞(huai)、單元電(dian)(dian)子板(ban)(ban)潮(chao)濕(shi)或(huo)(huo)損(sun)壞(huai)以及通(tong)(tong)信故(gu)(gu)(gu)障(zhang)引起(qi)的(de)(de)(de)(de)(de)誤(wu)報(bao)警。當外界空(kong)氣(qi)溫度(du)低(di)(di)(di),冷(leng)(leng)(leng)(leng)(leng)卻(que)水(shui)(shui)(shui)(shui)(shui)溫度(du)很(hen)低(di)(di)(di)時(shi),也(ye)(ye)會(hui)(hui)發(fa)生低(di)(di)(di)壓(ya)(ya)(ya)(ya)(ya)(ya)(ya)故(gu)(gu)(gu)障(zhang);機(ji)(ji)(ji)組(zu)(zu)運(yun)(yun)(yun)行時(shi),由于預熱(re)(re)不(bu)足,冷(leng)(leng)(leng)(leng)(leng)凍油溫度(du)低(di)(di)(di),制(zhi)冷(leng)(leng)(leng)(leng)(leng)劑(ji)(ji)(ji)沒有完全分離(li),也(ye)(ye)會(hui)(hui)出(chu)(chu)現低(di)(di)(di)壓(ya)(ya)(ya)(ya)(ya)(ya)(ya)故(gu)(gu)(gu)障(zhang)。在(zai)(zai)(zai)前一(yi)種情(qing)況(kuang)下(xia)(xia),可(ke)以采取關(guan)閉(bi)冷(leng)(leng)(leng)(leng)(leng)卻(que)塔和(he)對冷(leng)(leng)(leng)(leng)(leng)卻(que)水(shui)(shui)(shui)(shui)(shui)進行節流(liu)(liu)等措施來(lai)提高冷(leng)(leng)(leng)(leng)(leng)卻(que)水(shui)(shui)(shui)(shui)(shui)溫度(du)。在(zai)(zai)(zai)后(hou)一(yi)種情(qing)況(kuang)下(xia)(xia),預熱(re)(re)時(shi)間(jian)(jian)(jian)延長(chang),冷(leng)(leng)(leng)(leng)(leng)凍油的(de)(de)(de)(de)(de)溫度(du)通(tong)(tong)常(chang)(chang)(chang)會(hui)(hui)在(zai)(zai)(zai)上升(sheng)后(hou)恢(hui)復正常(chang)(chang)(chang)。
  工(gong)業冷(leng)水機組(zu)閥(fa)(fa)(fa)門(men)(men)溫(wen)度(du)(du)(du)低故(gu)(gu)(gu)障(zhang):膨(peng)(peng)脹(zhang)閥(fa)(fa)(fa)出口溫(wen)度(du)(du)(du)反映(ying)蒸發(fa)溫(wen)度(du)(du)(du),是(shi)影響傳熱的(de)一(yi)個因(yin)素。一(yi)般(ban)情況(kuang)下(xia),出口溫(wen)度(du)(du)(du)與冷(leng)媒水的(de)溫(wen)差(cha)為(wei)5~6。當閥(fa)(fa)(fa)門(men)(men)溫(wen)度(du)(du)(du)低故(gu)(gu)(gu)障(zhang)發(fa)生時(shi),壓(ya)縮(suo)機將停止,當閥(fa)(fa)(fa)門(men)(men)溫(wen)度(du)(du)(du)升高(gao)時(shi),壓(ya)縮(suo)機將自動恢復運行,保護值為(wei)-2。閥(fa)(fa)(fa)門(men)(men)溫(wen)度(du)(du)(du)低故(gu)(gu)(gu)障(zhang)的(de)原因(yin)如下(xia):少量(liang)制冷(leng)劑泄(xie)漏,一(yi)般(ban)顯示(shi)閥(fa)(fa)(fa)門(men)(men)溫(wen)度(du)(du)(du)低故(gu)(gu)(gu)障(zhang),而不(bu)(bu)是(shi)壓(ya)力低故(gu)(gu)(gu)障(zhang)。制冷(leng)劑在膨(peng)(peng)脹(zhang)閥(fa)(fa)(fa)出口蒸發(fa)不(bu)(bu)足,導致冷(leng)卻,其特征是(shi)膨(peng)(peng)脹(zhang)閥(fa)(fa)(fa)出口結霜(shuang)

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