EP-4317886-B1 - HEAT EXCHANGER

EP4317886B1EP 4317886 B1EP4317886 B1EP 4317886B1EP-4317886-B1

Inventors

LI, HUA
SHEN, Shijie

Dates

Publication Date: 20260506
Application Date: 20220330

Claims (10)

A heat exchanger (1), comprising a plurality of heat exchange plates (10) arranged in a stacked manner, wherein each of the heat exchange plates comprises a base plate (11), a first protrusion (12) and a second protrusion (13), a direction perpendicular to the base plate is defined as a first direction, both the first protrusion and the second protrusion protrude towards the first direction, a first groove (14) is formed on a back side of the first protrusion, a second groove (15) is formed on a back side of the second protrusion, the base plate comprises two side surfaces, a side surface facing the first direction is defined as a first side surface (111), and a side surface facing away from the first direction is defined as a second side surface (112); a maximum width of an orthographic projection of the first groove on a plane where the second side surface of the base plate is located is defined as λ1, a maximum width of an orthographic projection of the second groove on the plane where the second side surface of the base plate is located is defined as λ2, a depth of the first groove relative to the second side surface of the base plate is defined as Dp1, a depth of the second groove relative to the second side surface of the base plate is defined as Dp2, a thickness of a protrusion top of the first protrusion is defined as h1, a thickness of a protrusion top of the second protrusion is defined as h2, characterised in that − 0.05 mm ≤ h 1 + Dp 1 − h 2 + Dp 2 ≤ 0.05 mm , Dp 1 > Dp 2 , and λ 1 < λ 2 .
The heat exchanger according to claim 1, wherein a thickness of the base plate is H, the depth Dp1 of the first groove relative to the second side surface of the base plate, the depth Dp2 of the second groove relative to the second side surface of the base plate, and the thickness H of the base plate meet the following relationship: Dp2<Dp1<Dp2+2.8H.
The heat exchanger according to claim 2, wherein the maximum width λ1 of the orthographic projection of the first groove on the plane where the second side surface of the base plate is located, the maximum width λ2 of the orthographic projection of the second groove on the plane where the second side surface of the base plate is located, the depth Dp1 of the first groove relative to the second side surface of the base plate and the depth Dp2 of the second groove relative to the second side surface of the base plate meet the following relationship: 0.2≤(λ1·Dp2)/(λ2·Dp1)≤0.9.
The heat exchanger according to claim 3, wherein the maximum width λ1 of the orthographic projection of the first groove on the plane where the second side surface of the base plate is located and the depth Dp1 of the first groove relative to the second side surface of the base plate meet the following relationship: 2.5≤λ1/Dp1≤5; and the maximum width λ2 of the orthographic projection of the second groove on the plane where the second side surface of the base plate is located and the depth Dp2 of the second groove relative to the second side surface of the base plate meet the following relationship: 3.5≤λ2/Dp2≤7.
The heat exchanger according to any one of claims 1 to 4, wherein the heat exchange plate comprises a first corner hole area, a second corner hole area and a heat exchange area, along a length direction of the heat exchange plate, the heat exchange plate comprises a first end and a second end, wherein the first corner hole area is close to the first end of the heat exchange plate, the second corner hole area is close to the second end of the heat exchange plate, the heat exchange area is located between the first corner hole area and the second corner hole area, a first flow guide area is provided between the first corner hole area and the heat exchange area, a second flow guide area is provided between the second corner hole area and the heat exchange area, the first protrusion is provided in the heat exchange area, and the second protrusion is provided in the first flow guide area and/or the second flow guide area; and/or, along a width direction of the heat exchange plate, the first corner hole area is provided with a first corner hole and a second corner hole, and the second corner hole area is provided with a third corner hole and a fourth corner hole, wherein the second protrusion is provided between the first corner hole and the second corner hole, and/or, the second protrusion is provided between the third corner hole and the fourth corner hole.
The heat exchanger according to claim 5, wherein the heat exchange plate is further provided with a plurality of protruding parts protruding towards the first direction; the protruding parts are respectively arranged around an edge of the first corner hole and an edge of the third corner hole, and the first corner hole and the third corner hole are each provided at a top of the corresponding protruding part; and/or, the protruding parts are arranged at outer peripheries of the second corner hole and the fourth corner hole, and predetermined distances are respectively provided between the second corner hole and the corresponding protruding part, and between the fourth corner hole and the corresponding protruding part; along the width direction of the heat exchange plate, the first corner hole and the third corner hole are arranged on a same side of the heat exchange plate, or the first corner hole and the third corner hole are arranged on two sides of the heat exchange plate; and a back side of the protrusion top of the first protrusion has a first flat part, a back side of the protrusion top of the second protrusion has a second flat part, a back side of a top of each of the protruding parts has a third flat part, wherein a width Wb1 of the first flat part, a width Wb2 of the second flat part, and a width Wb3 of the third flat part meet the following relationship: Wb1≤Wb2<Wb3.
The heat exchanger according to any one of claims 1 to 4, wherein the first protrusion is a wave-shaped protrusion, a plurality of the wave-shaped protrusions are provided along a length direction of the heat exchange plate, a first recess is formed between two adjacent wave-shaped protrusions, each of the wave-shaped protrusions comprises a plurality of extension sections, and the plurality of extension sections are arranged obliquely relative to the length direction of the heat exchange plate.
The heat exchanger according to any one of claims 1 to 4, wherein a third protrusion protruding towards the first direction is provided between at least part of pairs of adjacent first protrusions, a third groove is formed on a back side of the third protrusion, and a height of the third protrusion relative to the first side surface of the base plate is smaller than a height of the first protrusion relative to the first side surface of the base plate; and the first protrusion is a wave-shaped protrusion, a plurality of the wave-shaped protrusions are provided along a length direction of the heat exchange plate, each of the wave-shaped protrusions comprises a plurality of extension sections, the plurality of extension sections are arranged obliquely relative to the length direction of the heat exchange plate, the third protrusion is a wave-shaped protrusion, and a second recess is formed between the third protrusion and the corresponding first protrusion which are adjacent to each other.
The heat exchanger according to any one of claims 1 to 4, wherein a fourth groove that is recessed away from the first direction is provided between at least part of pairs of adjacent first protrusions, a fourth protrusion is formed on a back side of the fourth groove, a height of the first protrusion relative to the first side surface of the base plate is greater than a height of the fourth protrusion relative to the second side surface of the base plate; and the first protrusion is a wave-shaped protrusion, a plurality of the wave-shaped protrusions are provided along a length direction of the heat exchange plate, each of the wave-shaped protrusions comprises a plurality of extension sections, the plurality of extension sections are arranged obliquely relative to the length direction of the heat exchange plate, the fourth protrusion is a wave-shaped protrusion, and the fourth protrusion is provided between two adjacent first grooves.
The heat exchanger according to any one of claims 1 to 4, wherein the heat exchange plate comprises a first corner hole area, a second corner hole area and a heat exchange area, along a length direction of the heat exchange plate, the heat exchange plate comprises a first end and a second end, wherein the first corner hole area is close to the first end of the heat exchange plate, the second corner hole area is close to the second end of the heat exchange plate, the heat exchange area is located between the first corner hole area and the second corner hole area, the first protrusion is provided in the heat exchange area, the first groove is a pit structure, the heat exchange area is further provided with a recessed portion, and a plurality of the first protrusions are arranged around the recessed portion.

Description

FIELD The present application relates to the technical field of heat exchange, and in particular to a heat exchanger. BACKGROUND A heat exchanger in the conventional technology includes a plurality of heat exchange plates arranged in a stacked manner, the heat exchange plate is provided with protrusions to increase the contact area between the heat exchange plate and the heat exchange fluid, and to disturb the heat exchange fluid to improve heat exchange performance. For a compact plate heat exchanger, especially in application scenarios such as automobiles or energy-efficient refrigeration equipment, a flow-channel size of the heat exchanger is significantly reduced, from a traditional hydraulic diameter of 3 to 5mm, to a hydraulic diameter below 3mm, even 2mm or less. In such a situation, higher requirements are put forward for the manufacturing accuracy of the heat exchange plate, especially for plate molds, stamping technology, brazing technology, etc., the technical difficulty is significantly increased compared with related applications in traditional industries. The heat exchange plate usually adopts a full profiling mold manufacturing technology, that is, the mold is manufactured by complete profile modeling according to the structure of the heat exchange plate. In the case that the heat exchange plate is provided with two or more different structures of protrusions, it is easy to cause the heights of tops of some protrusions to be different, and pseudo soldering is prone to occur at a position with a lower height of the top of the protrusion, which ultimately affects the heat exchange performance and the reliability of a product. CN-A-106197093, CN-A-210718795 and WO-A-2021023031 all disclose a heat exchanger according to the preamble of claim 1. SUMMARY The object of the present application is to provide a heat exchanger, which reduces height differences of tops of protrusions of a heat exchange plate, to reduce pseudo soldering of the heat exchanger. A heat exchanger is provided according to the embodiments of the present application. The heat exchanger includes multiple heat exchange plates arranged in a stacked manner, each of the heat exchange plates includes a base plate, a first protrusion and a second protrusion, a direction perpendicular to the base plate is defined as a first direction, both the first protrusion and the second protrusion protrude towards the first direction, a first groove is formed on a back side of the first protrusion, a second groove is formed on a back side of the second protrusion, the base plate includes two side surfaces, a side surface facing the first direction is defined as a first side surface, and a side surface facing away from the first direction is defined as a second side surface; a maximum width of an orthographic projection of the first groove on a plane where the second side surface of the base plate is located is defined as λ1, a maximum width of an orthographic projection of the second groove on the plane where the second side surface of the base plate is located is defined as λ2, a depth of the first groove relative to the second side surface of the base plate is defined as Dp1, a depth of the second groove relative to the second side surface of the base plate is defined as Dp2, a thickness of a protrusion top of the first protrusion is defined as h1, a thickness of a protrusion top of the second protrusion is defined as h2, where -0.05mm≤(h1+ Dp1)-(h2+ Dp2)≤0.05mm, Dp1> Dp2, and λ1<λ2. The heat exchange plate has the first protrusion and the second protrusion, the first groove is formed on the back side of the first protrusion, the second groove is formed on the back side of the second protrusion, -0.05mm≤(h1+Dp1)-(h2+Dp2)≤0.05mm is met, Dp1>Dp2, and λ1<λ2. Since λ1<λ2, the deformation of the heat exchange plate in the area where the first protrusion is located is greater than the deformation of the heat exchange plate in the area where the second protrusion is located, which easily causes the thinning degree of the material of the top of the first protrusion to be greater than the thinning degree of the material of the top of the second protrusion. That is, a thickness of the top of the first protrusion is smaller than a thickness of the top of the second protrusion, which easily causes the top of the first protrusion to be lower than the top of the second protrusion. By increasing the depth Dp1 of the first groove, that is, by making the depth Dp1 of the first groove greater than the depth Dp2 of the second groove, the thinned amount of the top of the first protrusion is compensated through the depth of the first groove, which reduces the height difference between the top of the first protrusion and the top of the second protrusion, and thereby reducing the pseudo soldering of the heat exchanger. BRIEF DESCRIPTION OF THE DRAWINGS Figure 1 is a three-dimensional view showing the structure of a heat exchanger according to the present application;Fi