MANUFACTURING METHOD OF TUBE FOR HEAT EXCHANGER

摘要

PURPOSE: A manufacturing method of tube for heat exchanger is provided to improve productivity by assembling a plural tube rows in a single process in a heat exchanger for carbon dioxide and manufacturing the tube rows easily with an existing facility. CONSTITUTION: The manufacturing method of an integral tube(50) for heat exchanger comprises extrusion step of integrally forming at least two or more tube bodies(52,54) in which a refrigerant pipe is longitudinally formed as a continuous line and a bridge(56) for connecting the tube bodies; drilling step of forming penetration holes(58) on the bridge in a length direction of the bridge with spaced apart from each other in a certain distance; cutting step of cutting the integral tube(50) to a certain length from a part where the penetration holes are formed; and a post-processing step of processing both end parts of the cut integral tube, wherein both end parts of the tube bodies are processed in a shape corresponding to shape of tube holes of header pipes(10,20) for heat exchanger into which the tube bodies are inserted in the post-processing step, and wherein the bridge(56) is thinner than the tube bodies(52,54).