# US 2024/0200877 A1 · Heat exchanger plate, heat exchanger plate laminate, and microchannel heat exchanger > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2024/0200877 A1 - Document ID: US20240200877A1 - Status: Published application - Kind: A1 - Application number: 18/554,912 - Filed: 2022-12-21 - Published: 2024-06-20 - Earliest claimed: 2021-12-28 - Assignees: Mayekawa Mfg. Co., Ltd.; The University of Electro-Communications - Applicants: Mayekawa Mfg. Co., Ltd.; The University of Electro-Communications - Inventors: Kosaku NISHIDA; Ikuro AKADA; Koji ENOKI - Web page: https://patentgrep.com/patent/US20240200877A1 ## CPC - F28D 9/0037: {the conduits for the other heat-exchange medium also being formed by paired plates touching each other (F28D9/0043 takes precedence)} - F28D 9/005: {the plates having openings therein for both heat-exchange media} - F28D 9/0075: {the plates having openings therein for circulation of the heat-exchange medium from one conduit to another} - F28D 9/02: the heat-exchange media travelling at an angle to one another (F28D9/04 takes precedence) - F28F 3/04: the means being integral with the element - F28F 3/048: {in the form of ribs integral with the element or local variations in thickness of the element, e.g. grooves, microchannels} - F28F 3/08: Elements constructed for building-up into stacks, e.g. capable of being taken apart for cleaning - F28F 9/0268: {in the form of multiple deflectors for channeling the heat exchange medium} - F28F 13/12: by creating turbulence, e.g. by stirring, by increasing the force of circulation (F28F13/08 takes precedence) - F28F 9/02: Header boxes; End plates - F28D: HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT (fluid heaters having heat generating means and heat transferring means F24H; furnaces F27; details of heat-exchange apparatus of general) - F28F: DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION (water and air traps, air venting F16) ## Abstract A first heat exchanger plate includes: an inlet header formed by a first opening; an outlet header formed by a second opening; and a plurality of partition walls disposed between the inlet header and the outlet header so as to partition a flow path for a fluid from the inlet header toward the outlet header into a plurality of parallel flow paths. At least one partition wall among the plurality of partition walls includes at least one notch. A pair of the parallel flow paths on both sides of the partition wall having the notch connect with each other via the notch. A first distance between the inlet header and the at least one notch in a flow direction of the fluid is less than a second distance between the outlet header and the at least one notch in the flow direction. ## Claims ### Claim 1 A heat exchanger plate, comprising: an inlet header formed by a first opening; an outlet header formed by a second opening; and a plurality of partition walls disposed between the inlet header and the outlet header so as to partition a flow path for a fluid from the inlet header toward the outlet header into a plurality of parallel flow paths, wherein at least one partition wall among the plurality of partition walls includes at least one notch, wherein a pair of the parallel flow paths on both sides of the partition wall having the notch connect with each other via the notch, and wherein a first distance between the inlet header and the at least one notch in a flow direction of the fluid is less than a second distance between the outlet header and the at least one notch in the flow direction. ### Claim 2 (depends on 1) The heat exchanger plate according to claim 1, wherein the at least one notch includes a plurality of first notches included in the plurality of partition walls respectively and arranged at the same position in the flow direction. ### Claim 3 (depends on 1) The heat exchanger plate according to claim 1, wherein the first distance is greater than 0% and less than 10% with respect to an entire length of the parallel flow paths. ### Claim 4 (depends on 1) The heat exchanger plate according to claim 1, wherein the at least one notch includes: at least one first notch having a distance from the inlet header, which is the first distance; and at least one adjacent notch located downstream of the first notch and adjacent to the first notch in the flow direction, and wherein an adjacent distance between the inlet header and the adjacent notch is not less than 25% and less than 90% with respect to an entire length of the parallel flow paths. ### Claim 5 (depends on 1) The heat exchanger plate according to claim 1, wherein the at least one notch includes: at least one first notch whose distance from the inlet header is the first distance; and at least one second notch disposed downstream of the first notch in the flow direction and having a distance from the outlet header, which is the second distance. ### Claim 6 (depends on 5) The heat exchanger plate according to claim 5, wherein the second distance is not less than 10% and not greater than 35% with respect to an entire length of the parallel flow paths in the flow direction. ### Claim 7 (depends on 1) The heat exchanger plate according to claim 1, wherein the at least one notch includes: at least one first notch having a distance from the inlet header, which is the first distance; at least one second notch disposed downstream of the first notch in the flow direction and having a distance from the outlet header, which is the second distance; and at least one third notch located between the first notch and the second notch and adjacent to the second notch in the flow direction, and wherein a distance between the inlet header and the third notch is not less than 50% and less than 60% with respect to an entire length of the parallel flow paths. ### Claim 8 (depends on 1) The heat exchanger plate according to claim 1, wherein the at least one notch includes: at least one first notch having a distance from the inlet header, which is the first distance; at least one second notch disposed downstream of the first notch in the flow direction and having a distance from the outlet header, which is the second distance; and at least one fourth notch located between the first notch and the second notch and adjacent to the first notch in the flow direction, and wherein a distance between the inlet header and the fourth notch is not less than 25% and less than 35% with respect to an entire length of the parallel flow paths. ### Claim 9 (depends on 1) The heat exchanger plate according to claim 1, wherein at least one partition wall among the plurality of partition walls includes: at first notch having a distance from the inlet header, which is the first distance; and a plurality of fifth notches that are a plurality of notches located downstream of the first notch and in a range where a distance from the inlet header in the flow direction of the fluid is not less than 32.5% and not greater than 67.5% with respect to an entire length of the parallel flow paths, the plurality of fifth notches having different positions in the flow direction. ### Claim 10 (depends on 9) The heat exchanger plate according to claim 9, wherein a separation distance in the flow direction between two of the fifth notches adjacent in the flow direction among the plurality of fifth notches is not less than 2% and not greater than 5% with respect to the entire length of the parallel flow paths. ### Claim 11 (depends on 9) The heat exchanger plate according to claim 9, wherein the plurality of fifth notches are included in the plurality of partition walls respectively and arranged at the same position in the flow direction. ### Claim 12 (depends on 9) The heat exchanger plate according to claim 9, wherein the plurality of fifth notches include: a fifth A notch; a fifth B notch located downstream of the fifth A notch and adjacent to the fifth A notch in the flow direction; and a fifth C notch located downstream of the fifth B notch and adjacent to the fifth B notch in the flow direction. ### Claim 13 (depends on 12) The heat exchanger plate according to claim 12, wherein the plurality of fifth notches include a fifth D notch located downstream of the fifth C notch and adjacent to the fifth C notch in the flow direction. ### Claim 14 (depends on 1) A heat exchanger plate laminate comprising a plurality of the heat exchanger plates according to claim 1. ### Claim 15 (depends on 14) A microchannel heat exchanger comprising the heat exchanger plate laminate according to claim 14.