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空调制冷系统故障的检修

时间:2018-10-16 点击次数:2083次 作者:成都中央空调安装 | 成都中央空调保养 | 成都中央空调维修


 

        制冷系统(tong)正常工(gong)作的条件(jian)是(shi):管(guan)路不堵、不漏(lou)、不缺制冷剂(ji)、压缩机(ji)排(pai)气(qi)压力足够高、四通(tong)换(huan)向阀工(gong)作不串气(qi)和管(guan)道内无空气(qi)。

1.空调制冷管路系统堵塞故障的检修

        管路(lu)系统堵塞主要表现为制(zhi)(zhi)冷效(xiao)果差、低压压力(li)偏(pian)低,电流略(lve)有下降(以空调在(zai)制(zhi)(zhi)冷状态为主,制(zhi)(zhi)冷状态与此(ci)同(tong)理)。
        堵(du)(du)(du)(du)塞分为(wei)冰(bing)堵(du)(du)(du)(du)和脏堵(du)(du)(du)(du)两种,如(ru)果是冰(bing)堵(du)(du)(du)(du),一(yi)般(ban)在毛细(xi)管处。冰(bing)堵(du)(du)(du)(du)的典型表现(xian)是冰(bing)堵(du)(du)(du)(du)出现(xian)时自(zi)动关(guan)机(ji),过(guo)(guo)一(yi)会儿(er)压(ya)力(li)便会回(hui)升。排除(chu)的方法很(hen)多(duo),如(ru)放(fang)掉制冷剂(ji),用(yong)氮气冲(chong)洗管道后(hou)再抽(chou)空加(jia)氟。脏堵(du)(du)(du)(du)后(hou)压(ya)力(li)不一(yi)定(ding)会回(hui)升,脏堵(du)(du)(du)(du)一(yi)般(ban)堵(du)(du)(du)(du)塞在毛细(xi)管或(huo)过(guo)(guo)滤器处。过(guo)(guo)滤器如(ru)堵(du)(du)(du)(du)塞,换(huan)之即(ji)可。如(ru)毛细(xi)管堵(du)(du)(du)(du)塞,可利用(yong)高压(ya)排堵(du)(du)(du)(du)或(huo)换(huan)新件。

2.空调制冷管系统泄露故障的检修

        管(guan)(guan)路泄(xie)露(lu)则(ze)表现(xian)为缺制(zhi)冷(leng)剂,轻(qing)微泄(xie)露(lu)会(hui)造成低(di)压(ya)(ya)压(ya)(ya)力(li)(li)降(jiang)低(di),严重漏(lou)气时(shi),由于系(xi)统内(nei)吸入空气,所有(you)(you)低(di)压(ya)(ya)压(ya)(ya)力(li)(li)与(yu)正常(chang)时(shi)相近,但(dan)此时(shi)系(xi)统内(nei)已经没有(you)(you)制(zhi)冷(leng)剂而是空气,所以压(ya)(ya)力(li)(li)波动很大,且关(guan)机后平(ping)衡压(ya)(ya)力(li)(li)会(hui)比(bi)正常(chang)时(shi)停机的平(ping)衡压(ya)(ya)力(li)(li)高。发(fa)现(xian)此故障(zhang)时(shi),找到管(guan)(guan)路漏(lou)点(dian)后补好即(ji)可。

3.空调压缩机排气压力不高故障的检修

        压(ya)(ya)缩机(ji)(ji)排气压(ya)(ya)力不(bu)(bu)高的表(biao)现(xian)为(wei)制冷(leng)效果差(cha),排气温(wen)度偏(pian)低。发现(xian)此(ci)现(xian)象后应把压(ya)(ya)缩机(ji)(ji)排气管(guan)焊开(kai),测高压(ya)(ya)压(ya)(ya)力是否足(zu)够(gou),如确实不(bu)(bu)够(gou)应更换压(ya)(ya)缩机(ji)(ji),当然如有能力恢(hui)复也可修复。

4.空调四通换向阀串气故障的检修

        四通换(huan)向(xiang)阀(fa)串气表现为(wei)高压与低(di)压的温差不大、低(di)压 管(guan)温度(du)和压力明(ming)显升(sheng)高。发现此现象,应更换(huan)四通换(huan)向(xiang)阀(fa)。

5.空调制冷系统故障的快速判断

        空调大多(duo)使用(yong)(yong)R22为制冷(leng)剂,使用(yong)(yong)工况大致相同。因(yin)此,其运行时高地压侧压力有一定规律,当(dang)环境温度为30℃左右时:
        ⑴低(di)压压力P1为0.45--0.55MPa
        ⑵高压压力P2为21.8--2MPa
        ⑶停机(ji)时平均压力P3为0.85--0.9MPa

 

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