Welding considerations of air-conditioner

in air-conditioner maintenance, there is a need to welding. This service we have seen it, if improper operation, is dangerous. So the welding process is executed in the commercial freezer, we should pay attention to what issues? Below with freezers price to learn together, the welding process of the pipeline in the freezer, attention should be paid to the following questions: ( 1) Clean the cooler metal surface welding of pipes, pipe fittings, in order to avoid moisture, oil and dirt and other impact on the quality of welding. ( 2) According to the welding pieces of suitable electrode material selection and flux. The use of the flux has a great influence on the quality of welding, flux is generally selected temperature lower than the electrode temperature of 50 ℃ advisable. ( 3) The cooler casing welding method of pipe welding is generally adopted. The capillary into tubes. Or welded pipe to make the cup mouth, then another tube inserted into the cup inside the mouth. Whatever the insert welding method, on the depth of insertion and clearance has certain requirements. If the insert is too short, not only influence the intensity and sealing, and easy to inject apertures, solder jam: if the clearance is too small, cannot flow into the solder, can only be attached to the outside interface, welding strength is poor, it is easy to crack and cause leakage; If the clearance is too large, not only waste of solder and solder easily into the cooler tube caused by congestion. ( 4) Welding parts must be fixed firm, had better use flat welding and welding pipes. For vertical welding, pipe expansion pipe nozzle must be down, to avoid molten solder into the freezer when welding pipe caused by congestion. ( 5) When welding, must be welded to a preheated. When preheating, but by changing the flame core endings and the distance between the welding parts, cause the preheating pieces for different temperature. For the same kind of material pipe, need to insert pipe, heating and heating flaring pipeline. Welds to uniform heating, the heating time shoulds not be too long, lest the air-conditioner pipeline caused by oxide layer, caused by capillary cooling system, dry filter clogging. ( 6) Capillary with dry welding filter installation location. Capillary insert filters, about 15 mm depth to the right. If the insert too deep, will hit the strainer screen, easy to cause congestion. Insert a shallow, welding solder easily blocked in capillary, impurities may cause dirty plugging directly into the freezer capillary. When welding, must grasp the flame heating rate of capillary and filter drier, to prevent excessive and capillary heating deformation or melting. In a word, had better use strong flame welding welding quickly, try to shorten the welding time, in order to prevent the pipe in oxide generated too much. Caused by oxide increases the flow of the refrigerant refrigeration system dirty plugging, serious when still can cause of air-conditioner compressor failure. So everyone in the future operation of air-conditioner welding time, not only need good welding, but also to pay attention to safety.
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