US 12,235,049 B2
Heat exchanger
Masakazu Enomura, Izumi (JP)
Assigned to M. TECHNIQUE CO., LTD., Izumi (JP)
Appl. No. 17/783,111
Filed by M. Technique Co., Ltd., Izumi (JP)
PCT Filed Dec. 20, 2019, PCT No. PCT/JP2019/050216
§ 371(c)(1), (2) Date Jun. 7, 2022,
PCT Pub. No. WO2021/124582, PCT Pub. Date Jun. 24, 2021.
Prior Publication US 2023/0020370 A1, Jan. 19, 2023
Int. Cl. F28D 7/02 (2006.01); F28F 9/00 (2006.01); F28F 19/02 (2006.01)
CPC F28D 7/02 (2013.01) [F28F 9/001 (2013.01); F28F 19/02 (2013.01)] 19 Claims
OG exemplary drawing
 
1. A heat exchanger comprising:
a first tube;
a second tube, the second tube being concentric with the first tube;
a first flow path and a second flow path, each of the first flow path and the second flow path extending spirally in a space formed between the first tube and the second tube,
wherein a heat exchange is performed between a first fluid flowing through the first flow path and a second fluid flowing through the second flow path via a heat transfer body,
wherein at least any one of the first tube and the second tube is a cylinder having a circular cross section,
wherein the heat transfer body is spirally attached to the first tube to form the second flow path between the heat transfer body and the first tube,
wherein flights of the heat transfer body are spaced from each other so that the first tube forms part of the first flow path, and
wherein the space is partitioned into the first flow path and the second flow path by the heat transfer body.