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EP-4290168-B1 - HEAT EXCHANGER

EP4290168B1EP 4290168 B1EP4290168 B1EP 4290168B1EP-4290168-B1

Inventors

  • LI, HUA
  • SHEN, Shijie

Dates

Publication Date
20260506
Application Date
20220129

Claims (10)

  1. A heat exchanger (1), comprising a first plate (10) and a second plate (20) that are arranged in a stacked manner, wherein the first plate (10) comprises a first base plate (11) and first protrusions (12) protruding from the first base plate (11), and the second plate (20) comprises a second base plate (21) and second protrusions (22) protruding from the second base plate (21); and each of the first protrusions (12) comprises a first protrusion top portion (121) and a first protrusion side portion (122) arranged around the first protrusion top portion (121), and each of the second protrusions (22) comprises a second protrusion top portion (221) and a second protrusion side portion (222) arranged around the second protrusion top portion (221); characterized in that : a thickness of the first plate (10) at the first protrusion top portion (121) is less than the thickness of the first plate (10) at the first protrusion side portion (122), a thickness of the second plate (20) at the second protrusion top portion (221) is less than the thickness of the second plate (20) at the second protrusion side portion (222), and the first protrusion top portion (121) is fixedly connected to the second protrusion top portion (221), wherein the first base plate (11) has a thickness of H1, the first protrusion (12) has a height of h1, wherein 0.2 ≤H1/h1 ≤ 1; and/ or the second base plate (21) has a thickness of H2, the second protrusion (22) has a height of h2, wherein 0.2 ≤ H2/h2 ≤ 1.
  2. The heat exchanger (1) according to claim 1, wherein the first protrusion (12) has a first recess (13) recessed relative to the first base plate (11), and the second protrusion (22) has a second recess (23) recessed relative to the second base plate (21), wherein an orthographic projection area of a fixed region (50), at which the first protrusion top portion (121) and the second protrusion top portion (221) are fixed to each other, on a plane in which the first base plate (11) is located is represented as "s"; an orthographic projection area of the first protrusion (12) on the plane in which the first base plate (11) is located is represented as "s1", wherein 2.5 ≤ (s+s1)/h1 ≤ 8; and/or an orthographic projection area of the second protrusion (22) on a plane in which the second base plate (21) is located is represented as "s2", wherein 2.5 ≤(s+s2)/h2 ≤ 8.
  3. The heat exchanger (1) according to claim 1, wherein the first protrusion top portion (121) is of an arc surface structure, and the second protrusion top portion (221) is of an arc surface structure, wherein a first recess bottom portion (131) and a first recess side portion (132) arranged around the first recess bottom portion (131) are provided at one side, facing away from the second plate (20), of the first protrusion (12); a second recess bottom portion (231) and a second recess side portion (232) arranged around the second recess bottom portion (231) are provided at one side, facing away from the first plate (10), of the second protrusion (22); and wherein the first recess bottom portion (131) is of a planar structure, and/or the second recess bottom portion (231) is of a planar structure.
  4. The heat exchanger (1) according to claim 1, wherein the first protrusion top portion (121) is of an arc surface structure, and the second protrusion top portion (221) is of an arc surface structure, wherein a first recess bottom portion (131) and a first recess side portion (132) arranged around the first recess bottom portion (131) are provided at one side, facing away from the second plate (20), of the first protrusion (12); a second recess bottom portion (231) and a second recess side portion (232) arranged around the second recess bottom portion (231) are provided at one side, facing away from the first plate (10), of the second protrusion (22); and wherein a curvature radius of the first recess bottom portion (131) is smaller than that of the first recess side portion (132), and/or a curvature radius of the second recess bottom portion (231) is smaller than that of the second recess side portion (232).
  5. The heat exchanger (1) according to claim 1, wherein the first protrusion top portion (121) is provided with a first planar portion (1211) facing the second protrusion (22), the second protrusion top portion (221) is provided with a second planar portion (2211) facing the first protrusion (12), wherein the first planar portion (1211) is in contact with the second planar portion (2211).
  6. The heat exchanger (1) according to claim 5, wherein a first recess bottom portion (131) and a first recess side portion (132) arranged around the first recess bottom portion (131) are provided at one side, facing away from the second plate (20), of the first protrusion (12); a second recess bottom portion (231) and a second recess side portion (232) arranged around the second recess bottom portion (231) are provided at one side, facing away from the first plate (10), of the second protrusion (22); and wherein a curvature radius of the first recess bottom portion (131) is smaller than that of the first recess side portion (132), and/or a curvature radius of the second recess bottom portion (231) is smaller than that of the second recess side portion (232).
  7. The heat exchanger (1) according to any one of claims 1 to 6, wherein the first plate (10) and the second plate (20) each is an aluminum alloy plate; and wherein one side, facing the second protrusion (22), of the first plate (10) is provided with a composite layer; and/or one side, facing the first protrusion (12), of the second plate (20) is provided with a composite layer; and the first protrusion top portion (121) and the second protrusion top portion (221) are fixed to each other by welding.
  8. The heat exchanger (1) according to claim 7, wherein the composite layer located at the first protrusion top portion (121) and/or the composite layer located at the second protrusion top portion (221) form a fixed region (50) by welding; the first protrusion side portion (122) is not in contact with the second protrusion side portion (222); and an angle between a tangent of the first protrusion side portion (122) at an outer edge of the fixed region (50) and a tangent of the second protrusion side portion (222) at the outer edge of the fixed region (50) is represented as "a", wherein "a" is equal to or less than 120 degrees.
  9. The heat exchanger (1) according to claim 7, wherein the composite layer located at the first protrusion top portion (121) and/or the composite layer located at the second protrusion top portion (221) form a fixed region (50) by welding, wherein for the composite layer located in the fixed region (50), a thickness of part of the composite layer away from a center of the fixed region (50) is greater than that of another part of the composite layer closer to the center of the fixed region (50).
  10. The heat exchanger (1) according to any one of claims 1 to 6, wherein the first plate (10) further comprises a plurality of third protrusions (14) protruding away from the second plate (20), and third recesses (15) are formed at one side, facing the second plate (20), of the plurality of third protrusions (14), respectively; and the second plate (20) further comprises a plurality of fourth protrusions (24) protruding away from the first plate (10), and fourth recesses (25) are formed at one side, facing the first plate (10), of the plurality of fourth protrusions (24), respectively; and wherein in a length direction of the heat exchanger (1), the first protrusions (12) and the third recesses (15) are alternately arranged, and the second protrusions (22) and the fourth recesses (25) are alternately arranged.

Description

FIELD The present application relates to the technical field of heat exchange, and in particular to a heat exchanger. BACKGROUND Multiple channels are formed in a heat exchanger mainly by partition of stacked plates, and different media in adjacent channels exchange heat during circulation. In order to reduce the weight of the heat exchanger, aluminum alloy plates generally having a thickness of about 0.5 mm are usually used as the plates, and recesses or protrusions with different shapes are usually processed on the surface of the plate to improve the heat exchange performance. In order to further reduce the weight and cost of the heat exchanger, thinner and thinner plates, even less than 0.4 mm, have been developed in related industries. When recesses or protrusions are processed on an ultra-thin plate, a large material thinning rate, usually around 20% or even higher, exists locally in the process of pulling up the plate with a flat structure, which will affect the strength of the heat exchanger. The document US 20110180247 A1 discloses a plate heat exchanger, which comprises at least one heat exchanger plate. At least one of the exchanger plates comprises at least one section including indentations configured to be placed against corresponding indentations of a heat exchanger plate of a corresponding design. The indentations include at least a first type of indentations and at least a second type of indentations, and the first type of indentations and the second type of indentations are of a different design. SUMMARY The objective of the present application is to provide a heat exchanger, to ensure the strength of the heat exchanger. A heat exchanger is provided according to the invention. The heat exchanger includes a first plate and a second plate that are arranged in a stacked manner, where the first plate includes a first base plate and first protrusions protruding from the first base plate, and the second plate includes a second base plate and second protrusions protruding from the second base plate. Each of the first protrusions includes a first protrusion top portion and a first protrusion side portion arranged around the first protrusion top portion, where a thickness of the first plate at the first protrusion top portion is less than the thickness of the first plate at the first protrusion side portion. Each of the second protrusions includes a second protrusion top portion and a second protrusion side portion arranged around the second protrusion top portion. A thickness of the second plate at the second protrusion top portion is less than the thickness of the second plate at the second protrusion side portion, and the first protrusion top portion is fixedly connected to the second protrusion top portion. The first base plate has a thickness of H1, the first protrusion has a height of h1, where 0.2 ≤ H1/h1 ≤ 1; and/or the second base plate has a thickness of H2, the second protrusion has a height of h2, where 0.2 ≤ H2/h2 ≤ 1. The first plate according to the present application includes the first protrusions, each of the first protrusions includes the first protrusion top portion and the first protrusion side portion arranged around the first protrusion top portion. Multiple second protrusions are formed on the second plate, each of the second protrusions includes the second protrusion top portion and the second protrusion side portion arranged around the second protrusion. The thickness H1 of the first base plate and the height h1 of the first protrusion are set to satisfy 0.2 ≤ H1/h1 ≤ 1, and/or, the thickness H2 of the second base plate and the height h2 of the second protrusion are set to satisfy 0.2 ≤ H2/h2 ≤ 1. By setting the relationship between the thickness of the first plate and/or second plate and the height of the first protrusions and/or the second protrusions, the deformation amount of the thickness of the protrusion top portion and the thickness of the protrusion side portion can be adjusted, so that a maximum thinned region of the first plate and/or second plate is distributed at the protrusion top portion, and the range of the maximum thinned region of the first plate and/or second plate is reduced, so as to ensure that the thickness around the protrusion top is enough. The thickness of the first protrusion side portion is greater than that of the first protrusion top portion, the thickness of the second protrusion side portion is greater than that of the second protrusion top portion, and the first protrusion top portion having a large thinning amount is fixed to the second protrusion top portion having a large thinning amount, and the weakest regions of the first plate and the second plate are superimposed together to increase the thickness, thereby facilitating the improvement of the strength of the heat exchanger. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a schematic perspective structural view of a heat exchanger according to the present application;FIG. 2 is a schemati