推荐回答(5个)
这类制冷器具在更换毛细管的时候需要特别注意以下事情:
1、更换毛细管焊接时候,焊枪的火力温度要调节的高一些,焊接过程中速度要快,焊料量适中,以免造成毛细管端口堵塞;
2、更换的毛细管规格须与之前的规格一致;
3、毛细管长度如果有锯断,锯断的端口毛刺要清理干净,不能有缩口、变形;
4、毛细管端口插入管路内的长度不能过长,以控制在5mm左右的长度为佳;
5、在更换毛细管的同时,最好把系统管路中的干燥过滤器一并更换掉,防止后面出现脏堵或者冰堵;
6、更换完毛细管一定要首先充高压气体保压检漏,然后抽真空、保负压;确定没有问题了再加制冷剂。
更换毛细管对过程操作要求很高,一定要按照规范要求进行操作。
不同内径毛细管长度换算系数(倍数)
新内径 0.79 0.91 1.12 1.27 1.04 1.63
倍数
原内径
0.71 1.59
0.76 1.16
0.79 1.00 2.00
0.81 0.86 1.75
0.84 0.75 1.54
0.86 0.65 1.35
0.89 0.58 1.16 2.88
0.91 0.50 1.00 2.56
0.94 0.45 0.95 2.22
0.97 0.39 0.80 1.92
0.99 0.35 0.71 1.75
1.02 0.31 0.62 1.55 2.78
1.04 0.28 0.56 1.38 2.50
1.07 0.25 0.50 1.24 2.23
1.09 0.23 0.45 1.11 1.98
1.12 0.20 0.39 1.00 1.79 2.78
1.14 0.35 0.90 1.60 2.52
1.17 0.32 0.82 1.47 2.27
1.19 0.74 1.31 2.06
1.22 0.67 1.20 1.87
1.24 0.61 1.09 1.69
1.27 0.56 1.00 1.56
1.30 0.51 0.93 1.44
1.32 0.47 0.85 1.32
1.35 0.43 0.87 1.20
1.37 0.39 0.70 1.09 2.18
1.40 0.36 0.64 1.00 2.00
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