Double pipe and heat exchanger having the same

摘要

A double pipe (10) and a heat exchanger having the same are provided. The double pipe (10) including an outer pipe (11) and an inner pipe (13) formed within the outer pipe (11) includes: a plurality of barrier ribs (11a) formed in a length direction and disposed at a predetermined distance in a circumferential direction between the outer pipe (11) and the inner pipe (13); and a plurality of protruding portions (13a) formed at positions corresponding to each of the plurality of barrier ribs (11a) and protruded in a center direction and formed in a length direction of the inner pipe (13) from an inner circumferential surface of the inner pipe (13).