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工业冷冻机维修

来(lai)源:actimos.com 发布时间:

工业冷水机(ji)(ji)在使(shi)用过(guo)程(cheng)(cheng)中,难免会(hui)有机(ji)(ji)械磨(mo)损,会(hui)影(ying)响制(zhi)冷量。J9九游会AG 在冷水机(ji)(ji)的(de)使(shi)用过(guo)程(cheng)(cheng)中,记录运行(xing)参(can)数(shu)(shu),经常听听运行(xing)时的(de)声音,检查制(zhi)冷剂、冷冻油等(deng)情(qing)况(kuang),定期对其进行(xing)维护保(bao)养。万(wan)一冷水机(ji)(ji)出(chu)现故障时,维修人(ren)员(yuan)可以根据(ju)记录参(can)数(shu)(shu)做参(can)考,快速(su)找出(chu)问题症结,解决故障。

在工业冷冻机(ji)发(fa)生故障需要进行维(wei)修时,按一(yi)下步骤进行:

排(pai)净工业冷冻(dong)(dong)机系统内(nei)的制冷剂(ji)(ji):在(zai)冷水机吸(xi)气侧均会预(yu)留针阀(fa),将充(chong)气三通(tong)阀(fa)连接在(zai)针阀(fa)上,打开操作阀(fa)门,将工业冷冻(dong)(dong)机系统内(nei)部的制冷剂(ji)(ji)全(quan)部排(pai)放掉;

更换(huan)工业冷冻机有问(wen)(wen)题(ti)(ti)的零(ling)部(bu)件(jian):如果了解是哪些(xie)零(ling)部(bu)件(jian)有问(wen)(wen)题(ti)(ti),则(ze)直接更换(huan)掉(diao)有问(wen)(wen)题(ti)(ti)的零(ling)部(bu)件(jian);

3、冲氮(dan)试(shi)(shi)压(ya)(ya)(ya):还是通过冷(leng)(leng)(leng)(leng)水机吸(xi)气侧的(de)针阀将氮(dan)气注入(ru)冷(leng)(leng)(leng)(leng)水机系统(tong)(tong)内。试(shi)(shi)压(ya)(ya)(ya)时(shi)(shi)应(ying)采取逐(zhu)步(bu)向(xiang)冷(leng)(leng)(leng)(leng)水机系统(tong)(tong)内充(chong)入(ru)氮(dan)气、缓慢(man)升(sheng)压(ya)(ya)(ya)的(de)办法。首先可升(sheng)压(ya)(ya)(ya)到(dao)试(shi)(shi)验(yan)(yan)压(ya)(ya)(ya)力的(de)50%,然后按(an)lO%左右的(de)试(shi)(shi)验(yan)(yan)压(ya)(ya)(ya)力逐(zhu)级升(sheng)压(ya)(ya)(ya),当压(ya)(ya)(ya)力达到(dao)气压(ya)(ya)(ya)试(shi)(shi)验(yan)(yan)压(ya)(ya)(ya)力时(shi)(shi)即可。对制冷(leng)(leng)(leng)(leng)剂(ji)R22,氮(dan)气压(ya)(ya)(ya)力一般保持在1-1.9MPa,打压(ya)(ya)(ya)以后,可用(yong)洗洁精检漏(lou),也(ye)可将被(bei)检部件(jian)沉浸在水中进行(xing)检漏(lou),如(ru)有气泡冒(mao)出,表明(ming)有泄漏(lou),记下(xia)相应(ying)部位进行(xing)修复。也(ye)可对制冷(leng)(leng)(leng)(leng)系统(tong)(tong)进行(xing)保压(ya)(ya)(ya)试(shi)(shi)验(yan)(yan),在6-24h内压(ya)(ya)(ya)力基本不(bu)降低,则为正常。

4、抽真(zhen)(zhen)空(kong)(kong)(kong):工业冷冻(dong)机经过打压(ya)试(shi)验后确保没问题则(ze)需要(yao)进(jin)行(xing)抽真(zhen)(zhen)空(kong)(kong)(kong)处理。将冷水(shui)机系统(tong)中的(de)氮气(qi)放出(chu),然后抽真(zhen)(zhen)空(kong)(kong)(kong),抽真(zhen)(zhen)空(kong)(kong)(kong)可(ke)以(yi)抽走(zou)系统(tong)中残留(liu)的(de)不(bu)凝性气(qi)体(ti)和水(shui)分,也是充注制冷剂前(qian)必须进(jin)行(xing)的(de)工作。三通充气(qi)阀一端(duan)接(jie)真(zhen)(zhen)空(kong)(kong)(kong)压(ya)力表,另一端(duan)还(hai)是连接(jie)在针(zhen)阀上,管(guan)路连接(jie)好后,开动真(zhen)(zhen)空(kong)(kong)(kong)泵,空(kong)(kong)(kong)冷水(shui)机系统(tong)内的(de)空(kong)(kong)(kong)气(qi)与水(shui)分被抽出(chu),真(zhen)(zhen)空(kong)(kong)(kong)压(ya)力表的(de)指(zhi)针(zhen)逐渐转向低(di)(di)压(ya)读(du)数(shu)。抽真(zhen)(zhen)空(kong)(kong)(kong)的(de)时间一般(ban)为(wei)30min左(zuo)右(you)。若外界温度低(di)(di)于15℃,抽真(zhen)(zhen)空(kong)(kong)(kong)的(de)时间可(ke)延长至(zhi)1h,以(yi)达到真(zhen)(zhen)空(kong)(kong)(kong)压(ya)力表zui低(di)(di)压(ya)力读(du)数(shu)不(bu)再(zai)降低(di)(di)为(wei)止(压(ya)力读(du)数(shu)为(wei)1.33kPa),然后关闭三通阀,再(zai)关闭真(zhen)(zhen)空(kong)(kong)(kong)泵。

5、充注制冷剂:冷水(shui)机充注制冷剂的方式有两种(zhong),分别是低压(ya)侧充注法和高压(ya)侧充注法。

①低压(ya)(ya)侧充注(zhu)法(fa)一(yi)般是向制冷系统(tong)内充注(zhu)制冷剂气体,可(ke)在(zai)开(kai)机状(zhuang)(zhuang)态(tai)下充注(zhu)。对(dui)小(xiao)型往复式全(quan)封闭(bi)式压(ya)(ya)缩(suo)机,机壳上(shang)只有(you)一(yi)个工(gong)艺(yi)管,可(ke)以(yi)采取(qu)开(kai)机吸入的(de)方法(fa),也可(ke)在(zai)停机状(zhuang)(zhuang)态(tai)进(jin)行液体充注(zhu)。

②高(gao)压(ya)侧充注(zhu)(zhu)法(fa)是(shi)指在停机时从(cong)高(gao)压(ya)气(qi)门嘴向系(xi)统充注(zhu)(zhu)制(zhi)冷(leng)剂(ji),制(zhi)冷(leng)剂(ji)液体大部分进入(ru)冷(leng)凝器,适(shi)用于对制(zhi)冷(leng)剂(ji)按重量(liang)定量(liang)充注(zhu)(zhu),是(shi)一种较安全快速的充注(zhu)(zhu)方法(fa)。

试(shi)运行(xing):以上步骤(zhou)完成后对冷水机进行(xing)试(shi)运行(xing),确保没问(wen)题后即可。

工业冷冻机在维(wei)修完成,故(gu)障排除(chu)后,对冷水机相(xiang)应的零(ling)部件(jian)进行(xing)(xing)性能检测,确保机组安(an)全平稳运(yun)行(xing)(xing)。

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