Heat exchanger

Abstract

The utility model discloses a heat exchanger, which comprises a first end plate and a first heat exchange plate, the first end plate comprises a first plane part and a first convex part, the first plane part is welded and fixed with the first heat exchange plate, the first convex part protrudes from the first plane part, and the first upper end surface of the first convex part is used as a welding matching surface. Due to the fact that a certain distance exists between the first upper end face and the first plane part, the influence on the first plane part can be weakened when the first upper end face and the bolt are welded, and the welding quality of the first end plate and the first heat exchange plate can be improved.

Description

Technical Field

[0001] The utility model relates to the technical field of heat exchange equipment, in particular to a heat exchanger. Background Art

[0002] Figure 1a A schematic diagram of the three-dimensional structure of a heat exchanger of the background technology; Figure 1b for Figure 1a Front view of the middle end plate. As shown in the figure, the heat exchanger includes an end plate 01, multiple heat exchange plates 02 and bolts 03. The end plate 01 includes a concave area 011. One side of the concave area 011 is welded and fixed to the adjacent heat exchange plate, and the other side of the concave area 011 is welded and fixed to the bolts 03. Although this structure theoretically strengthens the structural strength of the concave area 011, in fact, during the production process, the end plate 01 is first welded to the multiple heat exchange plates 02, and then the bolts 03 are welded to the concave area 011. Therefore, the heat generated when welding the bolts 03 will affect the welding quality of the concave area 011 and the adjacent heat exchange plates.

[0003] In view of this, how to improve the heat exchanger to reduce the thermal impact of secondary welding provides a topic for improvement for those skilled in the art. Utility Model Content

[0004] The heat exchanger provided by the utility model includes a first end plate and a first heat exchange plate adjacent to the first end plate, an inter-plate flow channel is formed between the first end plate and the first heat exchange plate, the first end plate includes a first planar portion, a first corrugated portion and a first convex portion, the first planar portion is welded and fixed to the first heat exchange plate, the first convex portion protrudes from the first planar portion toward a direction away from the first heat exchange plate, the first end plate has a fluid port, along the length direction of the first end plate, there is a distance between the first convex portion and the fluid port, the first convex portion has a first upper end surface, and the first upper end surface serves as a welding mating surface.

[0005] The heat exchanger of the present application includes a first end plate and a first heat exchange plate, the first end plate includes a first plane portion and a first convex portion, the first plane portion is welded and fixed to the first heat exchange plate, the first convex portion protrudes from the first plane portion, and the first upper end surface of the first convex portion serves as a welding mating surface. Since the first upper end surface is at a certain distance from the first plane portion, the influence of the first upper end surface on the first plane portion when being welded with the bolt can be reduced, and the welding quality of the first end plate and the first heat exchange plate can be improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0006] Figure 1a : Background technology A schematic diagram of the three-dimensional structure of a heat exchanger;

[0007] Figure 1b : Figure 1aThe front view of the middle board;

[0008] Figure 2 : A front view of a first end plate of a heat exchanger provided by the utility model;

[0009] Figure 3 : Figure 2 Schematic diagram of the cross section along the AA direction;

[0010] Figure 4 : Figure 2 Schematic diagram of the cross section along the BB direction;

[0011] Figure 5 : A front view of a first heat exchange plate of a heat exchanger provided by the utility model;

[0012] Figure 6 : A front view of a second end plate of a heat exchanger provided by the utility model;

[0013] Figure 7 : Figure 6 Schematic diagram of the cross section along the middle DD direction;

[0014] Figure 8 : Figure 6 Schematic diagram of the cross section along the CC direction.

[0015] Figure 2-Figure 8 Explanation of symbols:

[0016] 1-first end plate, 10-fluid port;

[0017] 11-first planar portion, 12-first corrugated portion;

[0018] 121- ridge, 122- valley;

[0019] 13-the first convex part, 131-the first upper end surface;

[0020] 14- a second flat portion, 15- a second convex portion;

[0021] 151- second upper end surface, 16- first bending portion;

[0022] 2-first heat exchange plate, 21-second corrugated portion;

[0023] 3-second end plate, 31-third plane portion;

[0024] 32- boss portion, 33- welding matching portion;

[0025] 331-lower end surface, 34-second bending portion;

[0026] 4-second heat exchange plate, 5-bolts. DETAILED DESCRIPTION

[0027] In order to enable those skilled in the art to better understand the technical solution of the utility model, the utility model is further described in detail below in conjunction with the accompanying drawings and specific implementation methods. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can also be obtained based on these drawings without paying creative labor. The directional words such as upper and lower involved in this article are defined by the positions of the parts shown in the drawings relative to each other, just for the clarity and convenience of expressing the technical solution. It should be understood that the directional words used in this article should not limit the scope of protection requested by this application.

[0028] Figure 2 A front view of a first end plate of a heat exchanger provided by the utility model; Figure 3 for Figure 2 Schematic diagram of the cross section along the AA direction; Figure 4 for Figure 2 Schematic diagram of the cross section along the BB direction; Figure 5 This is a front view of a first heat exchange plate of a heat exchanger provided by the utility model.

[0029] As shown in the figure, the heat exchanger of this embodiment is specifically a plate heat exchanger, including a first end plate 1 and a plurality of heat exchange plates. The plurality of heat exchange plates include a first heat exchange plate 2 adjacent to the first end plate 1, and an inter-plate flow channel is formed between the first end plate 1 and the first heat exchange plate 2 for fluid heat exchange.

[0030] In this embodiment, the first end plate 1 serves as the front end plate of the heat exchanger, and specifically includes a first plane portion 11, a first corrugated portion 12, a first convex portion 13 and a first bent portion 16. The first bent portion 16 is bent toward the first heat exchange plate 2, and the first bent portion 16 is used to connect with the first heat exchange plate 2. The first plane portion 11 is fixed to the first heat exchange plate 2 by welding, and the first corrugated portion 12 includes a ridge 121 and a valley 122. The ridge 121 protrudes from the first plane portion 11 in a direction away from the first heat exchange plate 2, and the valley 122 is flush with the height of the first plane portion 11. The first convex portion 13 protrudes from the first plane portion 11 in a direction away from the first heat exchange plate 2. The first end plate 1 has a fluid port 10, which is located at both ends of the first end plate 1 in the length direction, and the fluid port 10 is used to connect the fluid inlet and outlet pipes. In order to avoid interference with the fluid inlet and outlet pipes when welding the bolts 5, the position of the first protrusion 13 has certain requirements, that is, along the length direction of the first end plate 1, there is a distance between the first protrusion 13 and the fluid port 10. Figure 3 Combination Figure 2 As shown, the first protrusion 13 has a first upper end surface 131 , and the first upper end surface 131 serves as a welding mating surface for being welded to the bolt 5 .

[0031] In this embodiment, the first convex portion 13 is provided to protrude from the first plane portion 11 in a direction away from the first heat exchange plate 2, and the first upper end surface 131 of the first convex portion 13 is used as a welding matching surface for welding with the bolt 5. Since the first upper end surface 131 is at a certain distance from the first plane portion 11, the influence of the first upper end surface 131 on the first plane portion 11 when welding with the bolt 5 can be reduced, and the welding quality of the first end plate 1 and the first heat exchange plate 2 can be improved.

[0032] In this embodiment, Figure 5 As shown, the first heat exchange plate 2 includes a second corrugated portion 21, and the first planar portion 11 is specifically welded to the second corrugated portion 21. Since the surfaces of the first planar portion 11 and the second corrugated portion 21 are plane, and the second corrugated portion 21 is a concave-convex structure, multiple contact welding points will be formed after the two are welded.

[0033] Furthermore, the first convex portion 13 is specifically a truncated cone structure, and the first upper end surface 131 of the first convex portion 13 is a circular surface. Such a design facilitates stamping and can be adapted to the bolt 5. Furthermore, there are at least two first convex portions 13, which are integrally formed on the first end plate 1 by stamping, and the first convex portions 13 are arranged along the length direction of the first end plate 1. Such a design makes it possible to adjust the position of the welding with the bolt 5 in the length direction of the first end plate 1. That is, the bolt welding position of the heat exchanger of this embodiment can be adaptively adjusted according to the system installation position and the size of the installation space.

[0034] like Figure 2 As shown, a center line extending along the length direction of the first end plate 1 is defined as X, and the first protrusions 13 are symmetrically arranged relative to the center line X, that is, the center of the first upper end surface 131 of each first protrusion 13 (the center of the circular surface) is located on the center line X. By so arranging, the bolts 5 welded and fixed to the first upper end surface 131 are also roughly located at the center in the width direction of the first end plate 1, so that the vibration of the heat exchanger is reduced when working in the system, and the connection reliability between the first protrusion 13 and the bolts 5 is improved.

[0035] Of course, it is conceivable that the first corrugated portion 12 is symmetrically arranged relative to the center line X, so that the flow channels on the left and right sides of the center line X are symmetrical and the heat exchange is uniform.

[0036] As a specific implementation scheme, Figure 2 As shown, the first corrugated portion 12 surrounds the first planar portion 11. Since the first planar portion 11 is welded to the first heat exchange plate 2 to form a plurality of contact welding points, the flow of the fluid will be blocked to a certain extent. By setting the first corrugated portion 12 around the first planar portion 11, the flow of the fluid on the left and right sides of the center line X can be strengthened, thereby improving the heat exchange efficiency.

[0037] Further, such as Figure 2As shown, the first end plate 1 further includes a second plane portion 14 and a second convex portion 15. The second plane portion 14 is flush with the height of the first plane portion 11. Similarly, the second plane portion 14 is welded and fixed to the first heat exchange plate 2, and the second convex portion 15 protrudes from the second plane portion 14 in a direction away from the first heat exchange plate 2. In actual production, the first plane portion 11 and the second plane portion 14 are a metal plate substrate before stamping, and the first corrugated portion 1, the first convex portion 13, and the second convex portion 15 are formed on the substrate by stamping.

[0038] In order to avoid interference with the fluid inlet and outlet pipes when welding the bolt 5, the position of the second protrusion 15 also has certain requirements, that is, along the length direction of the first end plate 1, there is a distance between the second protrusion 15 and the fluid port 10. The second protrusion 15 has a second upper end surface 151, and the second upper end surface 151 is flush with the height of the first upper end surface 131. The second upper end surface 151 serves as a welding mating surface for welding with the bolt 5.

[0039] Furthermore, the second convex portion 15 is specifically a truncated cone structure, and the second upper end surface 151 of the second convex portion 15 is a circular surface. Such a design is convenient for stamping and forming, and can be adapted to the bolt 5. Furthermore, there are at least two second convex portions 15, which are integrally formed on the first end plate 1 by stamping, and the second convex portions 15 are arranged along the length direction of the first end plate 1. The center line extending along the width direction of the first end plate 1 is defined as Y, and the second convex portion 15 and the first convex portion 13 are symmetrically arranged relative to the center line Y. Such a design, on the one hand, makes the position of the welding with the bolt 5 in the length direction of the first end plate 1 adjustable; on the other hand, the second convex portion 15 and the first convex portion 13 are symmetrically arranged relative to the center line Y, so that the bolt 5 can also be symmetrically arranged relative to the center line Y, and the bolt 5 is subjected to uniform force in the length direction of the first end plate 1, so that the vibration of the heat exchanger is reduced when working in the system, and the connection reliability of the first convex portion 13, the second convex portion 15 and the bolt 5 is improved.

[0040] It is conceivable that there are at least two bolts 5 , which are respectively welded and fixed to the first protrusion 13 and the second protrusion 15 .

[0041] Figure 6 A front view of a second end plate of a heat exchanger provided by the utility model; Figure 7 for Figure 6 Schematic diagram of the cross section along the middle DD direction; Figure 8 for Figure 6 Schematic diagram of the cross section along the CC direction.

[0042] In this embodiment, the heat exchanger further includes a second end plate 3 and a second heat exchange plate 4 adjacent to the second end plate 3. The second end plate 3 serves as a rear end plate of the heat exchanger. The second heat exchange plate 4 has the same structure as the first heat exchange plate 2 (eg, Figure 5As shown), an inter-plate flow channel is formed between the second end plate 3 and the second heat exchange plate 4.

[0043] As a specific implementation, the second end plate 3 includes a third plane portion 31, a boss portion 32, a welding matching portion 33, and a second bending portion 34. The second bending portion 34 is bent away from the second heat exchange plate 4, and the second bending portion 34 is used to connect with the second heat exchange plate 4. The boss portion 32 protrudes from the third plane portion 31 toward the second heat exchange plate 4, the boss portion 32 is welded and fixed to the second heat exchange plate 4, the welding matching portion 33 is flush with the third plane portion 31, and the boss portion 32 is arranged around the welding matching portion 33. Figure 7 Combination Figure 6 As shown, the welding fitting 33 has a lower end surface 331 , and the lower end surface 331 serves as a welding fitting surface.

[0044] By setting the boss portion 32 to protrude from the third plane portion 31 toward the second heat exchange plate 4, the boss portion 32 and the second heat exchange plate 4 are fixed by welding, and the lower end surface 331 of the welding matching portion 33 is used as a welding matching surface for welding and connecting with the bolt 5. Since there is a certain distance between the boss portion 32 and the lower end surface 331, the influence of the lower end surface 331 on the boss portion 32 when welding with the bolt 5 can be weakened, and the welding quality of the second end plate 3 and the second heat exchange plate 4 can be improved.

[0045] Furthermore, there are at least two welding matching parts 33, and the welding matching parts 33 are arranged along the length direction of the second end plate 3. In this way, the welding position of the bolt 5 in the length direction of the second end plate 3 is adjustable. In addition, the boss part 32 is extended along the length direction of the second end plate 3, so that the welding matching area between the boss part 32 and the second heat exchange plate 4 can be increased.

[0046] Correspondingly, there are at least two bolts 5 that match the welding matching parts 33 , and the two bolts 5 are respectively welded and fixed to the corresponding welding matching parts 33 .

[0047] The above are only preferred implementations of the present invention. It should be pointed out that ordinary technicians in this technical field can make several improvements and modifications without departing from the principles of the present invention. These improvements and modifications should also be regarded as the protection scope of the present invention.

Claims

1. A heat exchanger, comprising a first end plate and a first heat exchange plate adjacent to the first end plate, wherein an inter-plate flow channel is formed between the first end plate and the first heat exchange plate, characterized in that: The first end plate includes a first planar portion, a first corrugated portion and a first convex portion, the first planar portion is welded and fixed to the first heat exchange plate, the first convex portion protrudes from the first planar portion toward a direction away from the first heat exchange plate, the first end plate has a fluid port, and along the length direction of the first end plate, there is a distance between the first convex portion and the fluid port, and the first convex portion has a first upper end surface, and the first upper end surface serves as a welding mating surface.

2. The heat exchanger according to claim 1, characterized in that The first heat exchange plate includes a second corrugated portion, and the first planar portion and the second corrugated portion are welded and fixed to form a plurality of contact welding points.

3. The heat exchanger according to claim 2, characterized in that The first protrusion is a truncated cone, there are at least two first protrusions, the first protrusions are integrally formed with the first end plate, and the first protrusions are arranged along the length direction of the first end plate.

4. The heat exchanger according to claim 3, characterized in that A center line extending along the length direction of the first end plate is defined as X, the first convex portion is symmetrically arranged relative to the center line X, and the first corrugated portion is symmetrically arranged relative to the center line X.

5. The heat exchanger according to claim 1, characterized in that The first corrugated portion surrounds the first planar portion and includes a ridge and a valley. The ridge protrudes from the first planar portion toward a direction away from the first heat exchange plate, and the valley is flush with the height of the first planar portion.

6. The heat exchanger according to any one of claims 1 to 5, characterized in that: The first end plate also includes a second planar portion and a second convex portion, the second planar portion is flush with the height of the first planar portion, the second planar portion is welded and fixed to the first heat exchange plate, the second convex portion protrudes from the second planar portion in a direction away from the first heat exchange plate, along the length direction of the first end plate, there is a distance between the second convex portion and the fluid port, the second convex portion has a second upper end surface, and the second upper end surface serves as a welding mating surface.

7. The heat exchanger according to claim 6, characterized in that The second protrusion is a truncated cone, there are at least two second protrusions, the second protrusions are integrally formed on the first end plate, the second protrusions are arranged along the length direction of the first end plate, and the center line extending along the width direction of the first end plate is defined as Y. The first protrusion and the second protrusion are symmetrically arranged relative to the center line Y.

8. The heat exchanger according to claim 6, characterized in that The second upper end surface is flush with the height of the first upper end surface. The heat exchanger further includes bolts. There are at least two bolts. The bolts are respectively welded and fixed to the first protrusion and the second protrusion.

9. The heat exchanger according to any one of claims 1 to 5, characterized in that: It also includes a second end plate and a second heat exchange plate adjacent to the second end plate, wherein an inter-plate flow channel is formed between the second end plate and the second heat exchange plate; The second end plate includes a third plane portion, a boss portion and a welding fitting portion, wherein the boss portion protrudes from the third plane portion toward the second heat exchange plate, the boss portion is welded and fixed to the second heat exchange plate, the welding fitting portion is flush with the third plane portion, the boss portion is arranged around the welding fitting portion, and the welding fitting portion has a lower end surface, which serves as a welding fitting surface.

10. The heat exchanger according to claim 9, characterized in that There are at least two welding matching parts, the welding matching parts are arranged in an array along the length direction of the second end plate, and the boss part is extended along the length direction of the second end plate; The heat exchanger further comprises bolts, wherein there are at least two bolts, and the bolts are welded and fixed to the welding fitting portion.

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