DUAL-PIPE HEAT EXCHANGER AND METHOD FOR MANUFACTURE THEREOF Russian patent published in 2022 - IPC F28D7/10 F28F9/04 

FIELD: heat engineering.

SUBSTANCE: invention relates to heat engineering and can be used in dual-pipe heat exchangers. In a dual-pipe heat exchanger containing an external pipe and an internal pipe, arranged concentrically forming an annular gap between the pipes, inlet and outlet connections of the first fluid medium flowing in the first annular gap, and inlet and outlet connections of the internal pipe for intake and outtake of the second fluid medium flowing in the internal pipe for indirect heat exchange with the first fluid medium, the internal pipe is formed by at least two pipe sections interconnected by means of a butt-type connection. One of the pipe sections is made integrally in the form of a single part monolithic with the mounting wall, connecting the first end of the external pipe with the internal pipe so as to seal the first annular gap at the first end of the external pipe. The second annular gap is formed between the internal pipe and the mounting wall. The second annular gap is open to air and is not in fluid communication with either the first annular gap or the internal pipe, and is at least partially surrounded by the first annular gap.

EFFECT: creation of a heat exchanger with an internal and an external pipe.

14 cl, 26 dwg