# US 2021/0239404 A1 · Plate Heat Exchanger > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2021/0239404 A1 - Document ID: US20210239404A1 - Status: Published application - Kind: A1 - Application number: 16/325,812 - Filed: 2017-08-22 - Published: 2021-08-05 - Earliest claimed: 2016-08-25 - Assignees: Zhejiang Sanhua Intelligent Controls Co., Ltd. - Applicants: Zhejiang Sanhua Intelligent Controls Co., Ltd - Inventors: Fangfang YIN; Jiang ZOU; Wei ZHANG; Jiabin YE; Gang LV - Web page: https://patentgrep.com/patent/US20210239404A1 ## CPC - F28D 9/005: {the plates having openings therein for both heat-exchange media} - F28D 9/0056: {with U-flow or serpentine-flow inside conduits; with centrally arranged openings on the plates} - F28F 3/025: {the means being corrugated, plate-like elements} - F28F 3/06: the means being attachable to the element - F28F 3/08: Elements constructed for building-up into stacks, e.g. capable of being taken apart for cleaning - F28F 9/24: Arrangements for promoting turbulent flow of heat-exchange media, e.g. by plates (F28F1/38 takes precedence; in general F15D) - F28F 2275/06: by welding - 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 plate heat exchanger includes a first plate sheet and a second plate sheet. A blocking member is disposed between a front surface of the second plate sheet and a back surface of the first plate sheet. The blocking member is located between a first corner hole and a second corner hole of the second plate sheet, and one end of the blocking member is located on a side portion of the second plate sheet. A first corner hole of the second plate sheet bypasses the other end of the blocking member to communicate with a second corner hole of the second plate sheet. In the plate heat exchanger, a blocking member is disposed between two plate sheets, accordingly fluid can be evenly distributed, and the plate heat exchanger has good heat exchange performance. ## Claims ### Claim 1 A plate heat exchanger, comprising a heat exchange core, and a first flow passage and a second flow passage isolated from each other being formed in the heat exchange core, wherein the heat exchange core comprises first plates and second plates, each of the first plates comprises a front surface and a back surface at an opposite side of the front surface, and each of the second plates comprises a front surface and a back surface at an opposite side of the front surface; portions of the second flow passage are formed between the front surfaces of the first plates and the back surfaces of the adjacent second plates, and portions of the first flow passage are formed between the front surfaces of the second plates and the back surfaces of the adjacent first plates; the first plate comprises a first corner hole, a second corner hole, a third corner hole and a fourth corner hole, and the second plate also comprises a first corner hole, a second corner hole, a third corner hole and a fourth corner hole; the first corner hole, the second corner hole, the third corner hole and the fourth corner hole of the first plate are arranged to correspond to the first corner hole, the second corner hole, the third corner hole and the fourth corner hole of the second plate, respectively; and the first corner hole and the second corner hole of the second plate are in communication with each other, a blocking member is arranged between the front surface of the second plate and the back surface of the first plate, the blocking member is located between the first corner hole and the second corner hole of the second plate, one end of the blocking member is located at a side portion of the heat exchange core, and the first corner hole of the second plate is in communication with the second corner hole of the second plate by rounding another end of the blocking member. ### Claim 2 (depends on 1) The plate heat exchanger according to claim 1, wherein the heat exchange core further comprises fins, and each of the fins is arranged between the front surface of the second plate and the back surface of the corresponding first plate; each of the fins comprises a first hole, a second hole, a third hole, and a fourth hole; the first hole, the second hole, the third hole and the fourth hole of the fin correspond to the first corner hole, the second corner hole, the third corner hole and the fourth corner hole of the second plate, respectively; and the fin is further provided with a notch, the notch is located between the first hole and the second hole, the notch extends from a side close to the first hole and the second hole to an opposite side; the blocking member is arranged at the notch, and the notch is in a clearance fit with the blocking member. ### Claim 3 (depends on 2) The plate heat exchanger according to claim 2, wherein the first corner hole, the second corner hole, the third corner hole and the fourth corner hole of the second plate are located at four corners of the second plate respectively; the first corner hole and the second corner hole of the second plate are located at a same side, and the third corner hole and the fourth corner hole of the second plate are located at a same side; the first corner hole and the third corner hole of the second plate are diagonally arranged, and the second corner hole and the fourth corner hole of the second plate are diagonally arranged; and the first hole, the second hole, the third hole and the fourth hole of the fin are also located at four corners of the fin, a length of a fin region between the first hole and the second hole is L2, a length of a fin region between the first hole and the notch is L1, and L1 and L2 satisfy: ¼≤L1/L2≤¾; and, a width of the notch is B1, a width of the fin is B2, and B1 and B2 satisfy: ¼≤B1/B2≤¾. ### Claim 4 (depends on 3) The plate heat exchanger according to claim 3, wherein the blocking member is a baffle, the fin, the baffle and the second plate are fixed together by welding, L1 is half of L2, and ¼≤B1/B2≤½. ### Claim 5 (depends on 1) The plate heat exchanger according to claim 1, wherein the first corner hole, the third corner hole and the fourth corner hole of the second plate are located at three of the four corners of the second plate, respectively, and the third corner hole and the fourth corner hole are diagonally arranged; and the second corner hole is located between the first corner hole and the third corner hole, the blocking member is of an arc-shaped or irregular structure, and one end of the blocking member is close to a corner of the second plate where no corner hole is provided. ### Claim 6 (depends on 5) The plate heat exchanger according to claim 5, wherein the blocking member is a baffle, and the baffle and the second plate are fixed together by welding. ### Claim 7 (depends on 1) The plate heat exchanger according to claim 1, wherein the blocking member is a rib protruding from the front surface of the second plate by a certain distance, the second plate is stamped to form the rib, and the rib and the second plate are integrated. ### Claim 8 (depends on 1) The plate heat exchanger according to claim 1, wherein the number of the portions of the second flow passage formed between the front surfaces of the first plates and the back surfaces of the second plates is n1, the number of the portions of the first flow passage formed between the front surfaces of the second plates and the back surfaces of the first plates is n2, and n2 is greater than n1. ### Claim 9 (depends on 1) The plate heat exchanger according to claim 1, wherein both the first plate and the second plate are provided with a concave-convex structure formed by stamping, a portion of the first plate corresponding to the blocking member is provided with a plane portion, and/or a portion of the second plate corresponding to the blocking member is provided with a plane portion, and, the blocking member and the plane portion of the first plate and/or the plane portion of the second plate are fixed together by welding. ### Claim 10 (depends on 1) The plate heat exchanger according to claim 1, wherein a blocking member is further arranged between the front surface of the first plate and the back surface of the second plate, the blocking member between the front surface of the first plate and the back surface of the second plate is located between the third corner hole and the fourth corner hole of the first plate, one end of the blocking member between the front surface of the first plate and the back surface of the second plate is located at a side portion of the heat exchange core, and the third corner hole of the first plate bypasses another end of the blocking member between the front surface of the first plate and the back surface of the second plate to communicate with the fourth corner hole of the first plate. ### Claim 11 (depends on 2) The plate heat exchanger according to claim 2, wherein the first corner hole, the third corner hole and the fourth corner hole of the second plate are located at three of the four corners of the second plate, respectively, and the third corner hole and the fourth corner hole are diagonally arranged; and the second corner hole is located between the first corner hole and the third corner hole, the blocking member is of an arc-shaped or irregular structure, and one end of the blocking member is close to a corner of the second plate where no corner hole is provided. ### Claim 12 (depends on 2) The plate heat exchanger according to claim 2, wherein the blocking member is a rib protruding from the front surface of the second plate by a certain distance, the second plate is stamped to form the rib, and the rib and the second plate are integrated. ### Claim 13 (depends on 3) The plate heat exchanger according to claim 3, wherein the blocking member is a rib protruding from the front surface of the second plate by a certain distance, the second plate is stamped to form the rib, and the rib and the second plate are integrated. ### Claim 14 (depends on 5) The plate heat exchanger according to claim 5, wherein the blocking member is a rib protruding from the front surface of the second plate by a certain distance, the second plate is stamped to form the rib, and the rib and the second plate are integrated. ### Claim 15 (depends on 11) The plate heat exchanger according to claim 11, wherein the blocking member is a rib protruding from the front surface of the second plate by a certain distance, the second plate is stamped to form the rib, and the rib and the second plate are integrated. ### Claim 16 (depends on 2) The plate heat exchanger according to claim 2, wherein a blocking member is further arranged between the front surface of the first plate and the back surface of the second plate, the blocking member between the front surface of the first plate and the back surface of the second plate is located between the third corner hole and the fourth corner hole of the first plate, one end of the blocking member between the front surface of the first plate and the back surface of the second plate is located at a side portion of the heat exchange core, and the third corner hole of the first plate bypasses another end of the blocking member between the front surface of the first plate and the back surface of the second plate to communicate with the fourth corner hole of the first plate. ### Claim 17 (depends on 3) The plate heat exchanger according to claim 3, wherein a blocking member is further arranged between the front surface of the first plate and the back surface of the second plate, the blocking member between the front surface of the first plate and the back surface of the second plate is located between the third corner hole and the fourth corner hole of the first plate, one end of the blocking member between the front surface of the first plate and the back surface of the second plate is located at a side portion of the heat exchange core, and the third corner hole of the first plate bypasses another end of the blocking member between the front surface of the first plate and the back surface of the second plate to communicate with the fourth corner hole of the first plate. ### Claim 18 (depends on 5) The plate heat exchanger according to claim 5, wherein a blocking member is further arranged between the front surface of the first plate and the back surface of the second plate, the blocking member between the front surface of the first plate and the back surface of the second plate is located between the third corner hole and the fourth corner hole of the first plate, one end of the blocking member between the front surface of the first plate and the back surface of the second plate is located at a side portion of the heat exchange core, and the third corner hole of the first plate bypasses another end of the blocking member between the front surface of the first plate and the back surface of the second plate to communicate with the fourth corner hole of the first plate. ### Claim 19 (depends on 11) The plate heat exchanger according to claim 11, wherein a blocking member is further arranged between the front surface of the first plate and the back surface of the second plate, the blocking member between the front surface of the first plate and the back surface of the second plate is located between the third corner hole and the fourth corner hole of the first plate, one end of the blocking member between the front surface of the first plate and the back surface of the second plate is located at a side portion of the heat exchange core, and the third corner hole of the first plate bypasses another end of the blocking member between the front surface of the first plate and the back surface of the second plate to communicate with the fourth corner hole of the first plate. ### Claim 20 (depends on 7) The plate heat exchanger according to claim 7, wherein a blocking member is further arranged between the front surface of the first plate and the back surface of the second plate, the blocking member between the front surface of the first plate and the back surface of the second plate is located between the third corner hole and the fourth corner hole of the first plate, one end of the blocking member between the front surface of the first plate and the back surface of the second plate is located at a side portion of the heat exchange core, and the third corner hole of the first plate bypasses another end of the blocking member between the front surface of the first plate and the back surface of the second plate to communicate with the fourth corner hole of the first plate.