看空(kong)調銅管結霜(shuang)處(chu),然后(hou)放(fang)掉空(kong)調系(xi)統(tong)(tong)里(li)(li)的(de)R22,割開制(zhi)冷(leng)(leng)系(xi)統(tong)(tong),將氮(dan)氣(qi)打進系(xi)統(tong)(tong)里(li)(li),用(yong)氮(dan)氣(qi)的(de)壓力,把(ba)制(zhi)冷(leng)(leng)系(xi)統(tong)(tong)的(de)贓物沖出,放(fang)入干(gan)燥箱(xiang)中干(gan)燥,然后(hou),用(yong)焊把(ba)系(xi)統(tong)(tong)封(feng)好(hao),封(feng)系(xi)統(tong)(tong)的(de)時候特別(bie)注意,一定要快,不(bu)(bu)要讓過多的(de)空(kong)氣(qi)進去(qu),因為(wei)空(kong)氣(qi)里(li)(li)帶有好(hao)的(de)水(shui)蒸(zheng)汽在(zai)(zai)里(li)(li)面,不(bu)(bu)要,臟(zang)堵(du)修好(hao)了,冰堵(du)有來了,那(nei)就得不(bu)(bu)常失了,焊好(hao)后(hou),要讓銅管自然冷(leng)(leng)卻(que),不(bu)(bu)要用(yong)冷(leng)(leng)水(shui),或其他的(de)東西(xi)來冷(leng)(leng)卻(que),那(nei)樣冷(leng)(leng)卻(que)以(yi)后(hou),銅管的(de)內壁(bi)會(hui)產(chan)生氧(yang)化皮,掉在(zai)(zai)系(xi)統(tong)(tong)里(li)(li)。
將封(feng)好(hao)的系統,沖入氮氣(qi)封(feng)好(hao),飽壓24小(xiao)時,看(kan)壓力表掉壓了(le)沒(mei)有(you),如果掉壓證明,制冷系統沒(mei)有(you)封(feng)好(hao),請補焊。