Copper tube nitrogen charging and welding method and nitrogen charging and welding control device
A welding method and copper tube technology, applied in auxiliary devices, welding equipment, auxiliary welding equipment, etc., can solve the problems of capillary or expansion valve blockage, compressor cylinder stuck, stuck cylinder, etc., to improve quality, proper flow, reduce cost effect
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[0025] Attached below figure 1 , the welding control device of the copper tube nitrogen filling welding method provided by the present invention will be described in detail. The operation method of copper pipe nitrogen filling welding is as follows:
[0026] The nitrogen supply pressure is set below 0.05MPa; the nitrogen flow value is set, the precondition is that the diameters of the welded copper pipes from the inlet to the outlet should be the same, and the ports of the pipes are open. When the diameter of the copper pipe is 25.4mm and the wall thickness is 1mm, the cross-sectional area of the pipe is 3.14*(25.4 / 2-1) 2 =429.8mm 2 , The nitrogen flow rate is proportional to the cross-sectional area of the copper tube, thus, the calculated value of the nitrogen flow rate is about 4L / min. The flow rate of nitrogen filling is not specially stipulated, and the implementation value of the flow rate can be optimized according to the experimental results. Using this flow rat...
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