US 12,228,347 B2
Heat exchanger core and heat exchanger
Hiroyuki Nakaharai, Tokyo (JP); Nobuhide Hara, Tokyo (JP); Yoichi Uefuji, Tokyo (JP); Koichi Tanimoto, Tokyo (JP); Masaya Hatanaka, Tokyo (JP); Shunsaku Eguchi, Tokyo (JP); and Takuo Oda, Tokyo (JP)
Assigned to MITSUBISHI HEAVY INDUSTRIES, LTD., Tokyo (JP)
Appl. No. 17/798,202
Filed by MITSUBISHI HEAVY INDUSTRIES, LTD., Tokyo (JP)
PCT Filed Feb. 24, 2021, PCT No. PCT/JP2021/006767
§ 371(c)(1), (2) Date Aug. 8, 2022,
PCT Pub. No. WO2021/172320, PCT Pub. Date Sep. 2, 2021.
Claims priority of application No. 2020-031381 (JP), filed on Feb. 27, 2020; and application No. 2020-031402 (JP), filed on Feb. 27, 2020.
Prior Publication US 2023/0092417 A1, Mar. 23, 2023
Int. Cl. F28F 9/02 (2006.01); B21D 53/06 (2006.01); F28D 7/10 (2006.01); F28D 7/16 (2006.01)
CPC F28D 7/1669 (2013.01) [B21D 53/06 (2013.01); F28D 7/10 (2013.01)] 7 Claims
OG exemplary drawing
 
1. A heat exchanger core, comprising:
a core body including a plurality of axial passages extending along an axial direction; and a header adjacent to at least one end portion of the core body in the axial direction and having a header passage communicating with the plurality of axial passages,
wherein the header passage includes:
at least one radial passage extending along a radial direction, and a plurality of circumferential passages branched from each radial passage and communicating with one or more of the axial passages, respectively,
wherein a flow passage area of each radial passage is smaller in a second position than in a first position, where the second position is inward of the first position in the radial direction,
wherein at least one opening is formed by the at least one radial passage on an outer peripheral surface of the heat exchanger core in the header, and
wherein a total area of opening areas of each opening is equal to or smaller than a total area of areas of the plurality of circumferential passages when viewed from the axial direction.