# US 12,215,876 B2 · Heat exchanger fin, heat exchanger, indoor unit and air conditioner > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,215,876 B2 - Document ID: US12215876B2 - Status: Granted - Kind: B2 - Application number: 17/764,972 - Filed: 2020-03-02 - Published: 2022-12-22 - Granted: 2025-02-04 - Earliest claimed: 2019-10-23 - Assignees: Gd Midea Heating & Ventilating Equipment Co., Ltd.; Midea Group Co., Ltd. - Applicants: Gd Midea Heating & Ventilating Equipment Co., Ltd.; Midea Group Co., Ltd. - Inventors: Baisong Zhou; Bin Luo; Feng Li; Zhaohui Li; Kun Yang; Lin Wu - Web page: https://patentgrep.com/patent/US12215876B2 ## CPC - F24F 1/0067: by the shape of the heat exchangers or of parts thereof, e.g. of their fins - F28F 1/325: {Fins with openings} - F28F 1/20: the means being attachable to the element (F28F1/22 takes precedence) - F28F 1/32: the means having portions engaging further tubular elements - F28F 13/08: by varying the cross-section of the flow channels - F24F 13/30: Arrangement or mounting of heat-exchangers - F28D 1/024: {with an air driving element} - F28D 1/05316: {Assemblies of conduits connected to common headers, e.g. core type radiators (F28D1/05366 takes precedence)} - F28F 2210/08: Assemblies of conduits having different features - F28F 2210/10: Particular layout, e.g. for uniform temperature distribution - F28F 2215/00: Fins - F28F 2250/02: Streamline-shaped elements - F24F: AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING (removing dirt or fumes from areas where they are produced B08B15/00; vertical ducts for carrying away waste gases from buildings E04F17/02; tops for chimneys or ventilating shafts, terminals for flues F23L17/02) - F28F: DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION (water and air traps, air venting F16) - 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 Disclosed are a heat exchanger fin, a heat exchanger, an indoor unit and an air conditioner. The heat exchanger fin includes a fin body, and the fin body includes an air outlet contour line arranged on one side and an air inlet contour line arranged on the other side; refrigerant pipe mounting holes are provided in the fin body; and on a straight line where the curvature radius of the air outlet contour line of the fin body is located, or on a straight line where the curvature radius of the air inlet contour line of the fin body is located, the distance between the air inlet contour line and the air outlet contour line of the fin body is gradually reduced from the middle to two ends of the heat exchanger fin. ## Claims ### Claim 1 A heat exchanger fin, comprising: a fin body, comprising an air outlet contour line arranged at one side and an air inlet contour line arranged at other side, and provided with refrigerant pipe mounting holes; wherein the fin body is curved from a center of the heat exchanger fin to two ends of the heat exchanger fin; a distance between the air inlet contour line and the air outlet contour line of the fin body, on a straight line of a curvature radius of the air outlet contour line of the fin body or on a straight line of a curvature radius of the air inlet contour line of the fin body, decreases from the center of the heat exchanger fin to the two ends of the heat exchanger fin; the fin body is concave in a direction from an air inlet side to an air outlet side of the fin body; a distance between adjacent refrigerant pipe mounting holes is positively correlated with a diameter of the refrigerant pipe mounting holes: both the distance between adjacent refrigerant pipe mounting holes and the diameter of the refrigerant pipe mounting holes decreases from the center of the heat exchanger fin to the two ends of the heat exchanger fin; and number of the refrigerant pipe mounting holes is decreased from the center to the two ends of the heat exchanger fin. ### Claim 2 (depends on 1) The heat exchanger fin according to claim 1, wherein the fin body is a one-piece structure. ### Claim 3 (depends on 1) The heat exchanger fin according to claim 1, wherein at least part of the air outlet contour line of one heat exchanger fin overlaps with the air inlet contour line of an adjacent heat exchanger fin. ### Claim 4 (depends on 3) The heat exchanger fin according to claim 3, wherein a first end and a second end of the air inlet contour line are connected to the air outlet contour line respectively. ### Claim 5 (depends on 4) The heat exchanger fin according to claim 4, wherein a straight line corresponding to the maximum distance extends along an air inlet direction for the heat exchanger fin. ### Claim 6 (depends on 5) The heat exchanger fin according to claim 5, wherein the fin body is symmetrical relative to the straight line corresponding to the maximum distance. ### Claim 7 (depends on 5) The heat exchanger fin according to claim 5, wherein a length of the air inlet contour line at one side of the straight line corresponding to the maximum distance is greater than a length of the air inlet contour line at the other side of the straight line corresponding to the maximum distance. ### Claim 8 (depends on 7) The heat exchanger fin according to claim 7, wherein the air outlet contour line comprises five are segments connected in sequence, and curvatures decrease from the center to the two ends of the heat exchanger fin. ### Claim 9 (depends on 5) The heat exchanger fin according to claim 5, wherein a plane where an air inlet direction for the fin body is located is a first plane, and a plane which is perpendicular to the first plane is a second plane; and the fin body is of a larger projection size on the second plane than that on the first plane. ### Claim 10 (depends on 9) The heat exchanger fin according to claim 9, wherein the fin body is of a larger projection size on the second plane at one side of the straight line corresponding to the maximum distance than that on the second plane at the other side of the straight line corresponding to the maximum distance. ### Claim 11 (depends on 9) The heat exchanger fin according to claim 9, wherein the fin body is of a larger projection size on the first plane at one side of the straight line corresponding to the maximum distance than that on the first plane at the other side of the straight line corresponding to the maximum distance. ### Claim 12 (depends on 1) The heat exchanger fin according to claim 1, wherein the heat exchanger fin is formed as an equidistant region at the center, and the distance between the air inlet contour line and the air outlet contour line is equal within the equidistant region. ### Claim 13 (depends on 12) The heat exchanger fin according to claim 12, wherein the air inlet contour line and the air outlet contour line within the equidistant region are any one or any combination of an arc and a straight line. ### Claim 14 (depends on 1) The heat exchanger fin according to claim 1, wherein an inner diameter of the refrigerant pipe mounting holes are decreased from the center to the two ends of the heat exchanger fin. ### Claim 15 (depends on 1) The heat exchanger fin according to claim 1, wherein the distance between the air inlet contour line and the air outlet contour line of the fin body corresponding to the refrigerant pipe mounting holes are positively correlated with an internal diameter of each refrigerant pipe mounting hole, on a straight line of a curvature radius of the air outlet contour line of the fin body or on a straight line of a curvature radius of the air inlet contour line of the fin body: both the distance between the air inlet contour line and the air outlet contour line of the fin body and the internal diameter of each refrigerant pipe mounting hole decreases from the center of the heat exchanger fin to the two ends of the heat exchanger fin. ### Claim 16 (depends on 1) The heat exchanger fin according to claim 1, wherein an internal diameter of each refrigerant pipe mounting hole is linear-positively correlated with a distance of circle centers between any two adjacent refrigerant pipe mounting holes, on a straight line of a curvature radius of the air outlet contour line of the fin body or on a straight line of a curvature radius of the air inlet contour line of the fin body: both the internal diameter of each refrigerant pipe mounting hole and the distance of circle centers between any two adjacent refrigerant pipe mounting holes decreases from the center of the heat exchanger fin to the two ends of the heat exchanger fin. ### Claim 17 (depends on 1) A heat exchanger, comprising: at least one heat exchanger fin as defined in claim 1, which are arranged side by side, wherein a distance between any two adjacent heat exchanger fins is not less than a preset interval; and a refrigerant pipe, wherein a pipe diameter of the refrigerant pipe fits with a size of a refrigerant pipe mounting hole of the heat exchanger fin, and the refrigerant pipe passes through the refrigerant pipe mounting hole. ### Claim 18 (depends on 17) An indoor unit, comprising: a shell, provided with an air inlet and an air outlet; a fan, arranged inside the shell; and a heat exchanger as defined in claim 17, arranged inside the shell and arranged corresponding to the fan. ### Claim 19 (depends on 18) An air conditioner, comprising: an outdoor unit; and an indoor unit as defined in claim 18, connected to the outdoor unit.