COPPER HEAT TRANSFER PIPE FOR REFRIGERATING MACHINE, AND METHOD FOR MANUFACTURING THE COPPER HEAT PIPE

摘要

PROBLEM TO BE SOLVED: To realize a copper heat transfer pipe for an absorption type refrigerating machine for improving wettability or preventing them from deteriorating, and preventing the surface of a copper pipe from being discolored or a paint film from being released. SOLUTION: A colloidal silica covering film 2 and a silane coupling agent covering film 3 for covering the covering film 2 are provided on the outer surface of the copper pipe 1.