Double pipe and heat exchanger having the same

A double pipe heat exchanger comprising:

• a double pipe comprising a plurality of barrier ribs formed in a length direction and disposed at a predetermined distance in a circumferential direction between an outer pipe and an inner pipe, and a plurality of protruding portions formed at positions corresponding to each of the plurality of barrier ribs and protruded in a center direction and formed in a length direction of the inner pipe from an inner circumferential surface of the inner pipe;
• and
• a connector coupled to an end portion of the double pipe,
• wherein all the outer pipe, the inner pipe, the plurality of barrier ribs, and the plurality of protruding portions are integrally formed, and
• an outer pipe opening for inserting the double pipe is formed at one side of the connector, an inner pipe opening for inserting the other pipe having the same diameter as that of the inner pipe of the double pipe is formed at the other side of the connector, and space to be connected to an outer pipe flow path formed between the inner pipe and the outer pipe of the double pipe is formed within the connector.