# US 9,752,833 B2 · Heat exchanger > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 9,752,833 B2 - Document ID: US9752833B2 - Status: Granted - Kind: B2 - Application number: 13/825,051 - Filed: 2011-05-09 - Published: 2014-12-18 - Granted: 2017-09-05 - Earliest claimed: 2010-06-21 - Assignees: Sanhua (Hangzhou) Micro Channel Heat Exchange Co., Ltd.; Danfoss A/S - Applicants: Qiang Gao; Yanxing Li; Lin-Jie Huang - Inventors: Qiang Gao; Yanxing Li; Lin-Jie Huang - Web page: https://patentgrep.com/patent/US9752833B2 ## CPC - F28F 1/00: Tubular elements; Assemblies of tubular elements (specially adapted for movement F28F5/00) - F25B 1/005: {of the single unit type (F25B1/10 takes precedence)} - F25B 39/02: Evaporators - F25B 40/00: Subcoolers, desuperheaters or superheaters - F28D 1/0476: {the conduits having a non-circular cross-section} - F28D 15/04: with tubes having a capillary structure - F28F 9/0234: {having a second heat exchanger disposed there within, e.g. oil cooler} - F28F 9/027: {in the form of distribution pipes} - F28F 2250/06: Derivation channels, e.g. bypass - F28F: DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION (water and air traps, air venting F16) - F25B: REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS - 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) ## Abstract A heat exchanger comprises a first header (1), a second header (2) spaced apart from the first header (1) by a predetermined distance, flat tubes (3) each of which defines two ends connected to the first and second headers (1, 2), respectively, to communicate the first and second headers (1, 2), fins (4) interposed between adjacent flat tubes (3), and a flow member defining a fluid-flow passage and forming a partition-wall-type heat-exchanging unit with the second header (2). A refrigeration system comprises a compressor, a condenser, a throttle device, and an evaporator that is the heat exchanger. The compressor, condenser, throttle device, and evaporator are connected sequentially, and at least part of refrigerant flowing out of an outlet of the condenser enters into the flow member to exchange heat with a refrigerant flowing out of an outlet of the evaporator. ## Claims ### Claim 1 A heat exchanger comprising: a first header; a second header spaced apart from the first header by a predetermined distance and including an inner chamber; a plurality of flat tubes each of which defines two ends connected to the first and second headers, respectively, to communicate the first and second headers; a plurality of fins interposed between adjacent ones of the flat tubes; and a flow member defining a fluid-flow passage and forming a partition-wall-type heat-exchanging unit with the second header, wherein at least a part of the flow member is disposed inside the second header, wherein the partition-wall-type heat-exchanging unit includes a first fluid-flow passage through which a first refrigerant flows and a second fluid-flow passage isolated from the first fluid-flow passage through which a second refrigerant flows, wherein at least a part of the inner chamber of the second header defines the first fluid-flow passage, the fluid-flow passage defined by the flow member is configured as the second fluid-flow passage, and the second refrigerant exchanges heat with the first refrigerant flowing in the first fluid-flow passage while flowing in the second fluid-flow passage. ### Claim 2 (depends on 1) The heat exchanger according to claim 1, wherein the flow member includes a first partition plate disposed in the second header along a substantially axial direction of the second header to divide an inner chamber of the second header into first, second, and third chambers, the first chamber is communicated with the flat tubes and isolated from the second and third chambers, and the second and third chambers are communicated with each other. ### Claim 3 (depends on 2) The heat exchanger according to claim 2, wherein the second and third chambers are communicated with each other at rear ends thereof, the second chamber is formed with an inlet in a front-end surface thereof, and the third chamber is formed with an outlet in a front-end surface thereof. ### Claim 4 (depends on 2) The heat exchanger according to claim 2, wherein the first partition plate is T-shaped. ### Claim 5 (depends on 1) The heat exchanger according to claim 1, wherein the flow member includes a flow tube disposed in the second header along an axial direction of the second header and defining inlet and outlet ends that are extended out of the second header. ### Claim 6 (depends on 5) The heat exchanger according to claim 5, wherein the flow tube is disposed at a lower portion of an inner chamber of the second header and the inlet and outlet ends of the flow tube are extended out from front- and rear-end surfaces, respectively, of the second header. ### Claim 7 (depends on 5) The heat exchanger according to claim 5, wherein the flow member includes further a second partition plate dividing an inner chamber of the second header into upper and lower chambers communicated with each other, the flow tube is disposed in the lower chamber, and the outlet end of the flow tube is extended into the first header. ### Claim 8 (depends on 7) The heat exchanger according to claim 7, wherein the upper and lower chambers are communicated with each other at rear ends thereof, the inlet end of the flow tube is extended out of the second header from a lower side of a front portion of the second header along a substantially radial direction of the second header, and the outlet end of the flow tube is extended out of the second header from a rear-end surface of the lower chamber. ### Claim 9 (depends on 7) The heat exchanger according to claim 7, wherein a throttle mechanism is disposed in a portion of the flow tube extended between the first and second headers. ### Claim 10 (depends on 5) The heat exchanger according to claim 5, wherein the flow tube defines a circular cross-section. ### Claim 11 (depends on 5) The heat exchanger according to claim 5, wherein the flow tube is a micro-channel tube defining a plurality of micro-channels therein. ### Claim 12 (depends on 11) The heat exchanger according to claim 11, wherein the micro-channel tube defines a substantially circular arc cross-section. ### Claim 13 (depends on 11) The heat exchanger according to claim 11, wherein the flow member includes further inlet and outlet manifolds that are connected to two ends, respectively, of the micro-channel tube and inner chambers of the inlet and outlet manifolds are communicated with the micro-channels, respectively, of the micro-channel tube. ### Claim 14 (depends on 11) The heat exchanger according to claim 11, wherein the micro-channel tube is substantially U-shaped and a plurality of corrugated sub-fins are interposed between two side walls of the micro-channel tube. ### Claim 15 (depends on 5) The heat exchanger according to claim 5, wherein the flow member includes further a plurality of capillary tubes. ### Claim 16 (depends on 1) The heat exchanger according to claim 1, wherein the heat exchanger comprises further a third header communicated with an upper portion of an inner chamber of the second header and a gas-outlet pipe is disposed and communicated with an inner chamber of the third header. ### Claim 17 (depends on 16) The heat exchanger according to claim 16, wherein the third header is communicated with the inner chamber of the second header via a plurality of first connection tubes. ### Claim 18 (depends on 1) The heat exchanger according to claim 1, wherein the flow member includes a flow tube, third and fourth partition plates are disposed in the flow tube and divide an inner chamber of the flow tube into fourth, fifth, and sixth chambers, the fourth chamber is communicated with an inner chamber of the second header, and the fifth and sixth chambers are communicated with each other and isolated from the fourth chamber. ### Claim 19 (depends on 18) The heat exchanger according to claim 18, wherein the fifth and sixth chambers are communicated with each other at rear ends thereof, the fifth chamber is formed with an inlet in a front-end surface thereof, and the sixth chamber is formed with an outlet in a front-end surface thereof. ### Claim 20 (depends on 18) The heat exchanger according to claim 18, wherein the fourth chamber is communicated with the inner chamber of the second header via a plurality of second connection tubes connected between the flow tube and second header. ### Claim 21 (depends on 1) The heat exchanger according to claim 1, wherein the heat exchanger comprises further a third header communicated with an upper portion of an inner chamber of the second header, a gas-outlet pipe is disposed and communicated with an inner chamber of the third header, and the flow member includes a flow tube disposed in the third header and defining inlet and outlet ends that are extended out of the third header. ### Claim 22 (depends on 21) The heat exchanger according to claim 21, wherein the inlet end of the flow tube is extended out from a front portion of the third header along a substantially radial direction of the third header and the outlet end of the flow tube is extended out from a rear-end surface of the third header. ### Claim 23 (depends on 21) The heat exchanger according to claim 21, wherein the outlet end of the flow tube is extended into the first header. ### Claim 24 (depends on 23) The heat exchanger according to claim 23, wherein a throttle mechanism is disposed in a portion of the flow tube extended between the first and third headers. ### Claim 25 (depends on 1) The heat exchanger according to claim 1, wherein each of the flat tubes includes a bent segment and a plurality of straight segments connected to first and second ends, respectively, of the bent segment, the bent segment is twisted relative to the straight segments by a predetermined angle, and the fins are interposed between adjacent ones of the straight segments. ### Claim 26 A refrigeration system comprising: a compressor; a condenser; a throttle device; and an evaporator including: a first header; a second header spaced apart from the first header by a predetermined distance and including an inner chamber; a plurality of flat tubes each of which defines two ends connected to the first and second headers, respectively, to communicate the first and second headers; a plurality of fins interposed between adjacent ones of the flat tubes; and a flow member wherein at least a part of the flow member is disposed inside the second header, said flow member defining a fluid-flow passage and forming a partition-wall-type heat-exchanging unit with the second header, wherein the partition-wall-type heat-exchanging unit includes a first fluid-flow passage through which a first refrigerant flows and a second fluid-flow passage isolated from the first fluid-flow passage through which a second refrigerant flows, wherein at least a part of the inner chamber of the second header defines the first fluid-flow passage, the fluid-flow passage defined by the flow member is configured as the second fluid-flow passage, and the second refrigerant exchanges heat with the first refrigerant flowing in the first fluid-flow passage while flowing in the second fluid-flow passage, wherein the compressor, condenser, throttle device, and evaporator are connected sequentially, at least part of refrigerant flowing out of an outlet of the condenser enters into the flow member to exchange heat with a refrigerant flowing out of an outlet of the evaporator.