| 摘要 |
A double pipe heat exchanger is disclosed. According to an embodiment of the present invention, the double pipe heat exchanger comprises: an internal circulation pipe of which a first fluid flows into the inside; an external circulation pipe arranged to surround the internal circulation pipe, wherein a second fluid flows into a space formed between an inner circumferential surface and an outer circumferential surface of the internal circulation pipe; and at least one flow velocity device arranged between the external circulation pipe and the internal circulation pipe, wherein a support unit supporting a gap between an outer circumferential surface of the internal circulation pipe and an inner circumferential surface of the external circulation pipe is formed in a portion, and an opening unit through which the second fluid passes is formed in the other portion. Therefore, even if the double pipe heat exchanger is bent, a predetermined space can be formed between the internal circulation pipe and the external circulation pipe. |
