Heat exchange plate, heat exchange unit and heat exchange core

Abstract

The utility model provides a heat exchange plate, a heat exchange unit and a heat exchange core, and belongs to the technical field of heat transfer. The technical problems of low heat exchange efficiency, low welding spot density, low structural strength, stress concentration, gas-liquid separation, bypass, lateral flow and the like of an existing water heating connection structure are solved. The heat exchange plate comprises a plurality of wave crest units which are transversely distributed along a plate body, the horizontal sections of the wave crest units are discontinuous curves, a groove unit is formed between every two adjacent wave crest units, each wave crest unit comprises a plurality of wave crests which are vertically distributed along the plate body, and the horizontal sections of the wave crests are arc sections. Two adjacent wave crests are opposite to each other, a flow guide groove is arranged between the head and the tail of the two adjacent wave crests, a recess capable of being communicated with the two adjacent flow guide grooves is arranged between the two adjacent flow guide grooves, and the groove is communicated with the recess. The heat exchanger has the advantages of being high in heat exchange efficiency, capable of improving welding spot density within the same range and the like.

Description

Technical Field

[0001] The utility model belongs to the field of heat transfer technology, and in particular relates to a heat exchange plate, a heat exchange unit and a heat exchange core. Background Art

[0002] A heat exchange plate is a heat exchange element made of sheet metal. It efficiently transfers heat through the flow of refrigerant between the plates, enabling heat exchange between different media. Existing technology often uses herringbone plate stacks, which suffer from low weld density, leading to strength and stress concentration issues. Furthermore, issues such as gas-liquid separation, bypass, and lateral flow are common during use, resulting in suboptimal heat exchange efficiency. Utility Model Content

[0003] The purpose of the present invention is to solve the above problems and provide a heat exchange plate that can improve the heat exchange efficiency and increase the density of welding points within the same range.

[0004] Another object of the present invention is to provide a heat exchange unit.

[0005] Another object of the present invention is to provide a heat exchange core.

[0006] To achieve the above-mentioned purpose, the present invention adopts the following technical solutions: the heat exchange plate includes a plurality of wave crest units distributed transversely along the plate body and having a discontinuous curve in horizontal cross-section, and a groove unit is formed between two adjacent wave crest units. The wave crest unit includes a plurality of wave crests distributed vertically along the plate body and having an arc segment in horizontal cross-section. The two adjacent wave crests are opposite to each other and a guide groove is provided between the head and tail of the two adjacent wave crests. A depression that can be connected to the guide grooves is provided between the two adjacent guide grooves. The groove unit is connected to the depression to form a main channel, and the two adjacent main channels are connected through the guide groove.

[0007] The discontinuous curve wave peak unit increases the surface area of ​​the heat exchange plate, provides more heat exchange interfaces, and helps to increase the contact area between the fluid and the heat exchange plate, thereby improving the heat exchange efficiency; due to the connection between the groove unit and the depression, the turbulence and mixing of the fluid are promoted, making the flow of the fluid on the surface of the heat exchange plate more complex, enhancing the heat conduction and convection heat transfer inside the fluid, and improving the overall heat exchange performance; the two adjacent wave peaks are opposite to each other and a guide groove is provided between the head and tail of the two adjacent wave peaks, which helps to guide the fluid to flow along a specific path, reduce the dead zone of the fluid flow, and improve the uniform distribution of the fluid on the surface of the heat exchange plate, thereby improving the uniformity of heat exchange; the wave peak with an arc segment in the horizontal cross section not only increases the heat exchange area, but also enables the heat exchange plate to better disperse stress when under pressure, improves the structural strength and durability of the heat exchange plate, and increases the density of welds; the design of the grooves and depressions helps to prevent the deposition of impurities in the fluid, reducing the difficulty of cleaning and maintenance.

[0008] In the aforementioned heat exchange plate, the central axis of the guide groove is parallel to or overlaps with the central axis of the crest unit; alternatively, the central axis of the guide groove is transversely perpendicular to the central axis of the crest unit; alternatively, the central axis of the guide groove is inclined relative to the central axis of the crest unit. That is, the guide groove is parallel to, perpendicular to, or inclined relative to the flow direction of the main channel. When the central axis of the guide groove is parallel to or overlaps with the central axis of the crest unit, it facilitates rapid passage through the crest unit and reduces flow resistance; when it is transversely perpendicular to the central axis of the crest unit, it increases the contact area of ​​the fluid on the heat exchange plate and improves heat exchange efficiency; when it is inclined relative to the central axis of the crest unit, it optimizes fluid distribution and heat exchange.

[0009] In the aforementioned heat exchange plate, the horizontal cross-section of the wave crests is C-shaped, V-shaped, or semi-elliptical. The C-shaped wave crests, due to their curved shape, can enhance fluid disturbance and improve heat exchange efficiency; the V-shaped wave crests provide a certain degree of vertical support, helping to enhance the structural strength of the heat exchange plate; and the semi-elliptical wave crests help evenly distribute the fluid on the heat exchange plate, reducing flow resistance.

[0010] In the aforementioned heat exchange plate, the groove units comprise grooves disposed between the crests of one crest unit and the crests of another crest unit between two adjacent rows of crest units. These grooves communicate with the flow-guiding grooves. The connection between the grooves and the flow-guiding grooves forms a complex network of fluid channels, which helps guide the fluid to flow and mix more fully within the heat exchange plate, thereby improving heat exchange efficiency and facilitating uniform distribution of the fluid across the plate.

[0011] In the aforementioned heat exchange plate, the cross-sectional shape of the guide grooves can be any one of V-shaped, trapezoidal, semicircular, or arc-shaped. V-shaped grooves provide deeper fluid channels, helping to increase the heat exchange area. The gradually expanding cross-sectional shape of the trapezoidal guide grooves helps to gradually decelerate and smoothly transition the fluid during flow, reducing fluid impact and noise. The cross-sectional shape of the semicircular or arc-shaped guide grooves allows the fluid to maintain a relatively uniform flow rate and direction during flow, contributing to uniform heat exchange across the heat exchange plate.

[0012] In the heat exchange plate described above, the crest top surface is flat, while the recessed bottom is provided with a welding surface. The welding surface provides a stable contact surface during welding, reducing defects such as deformation and cracking during welding, helping to ensure the quality and strength of the welded joint, thereby improving the reliability of the overall structure.

[0013] The present invention relates to a heat exchange unit, comprising two heat exchange plates as described above, wherein the two heat exchange plates are connected and the guide grooves are arranged inwards.

[0014] The two heat exchange plates are connected with the inward-facing flow guide grooves, making the entire heat exchange unit more compact and stable. This design helps reduce deformation and displacement of the heat exchange plates when subjected to changes in fluid pressure and temperature. Furthermore, because the flow guide grooves are facing inward, the connection between the two heat exchange plates can be more tightly sealed, reducing the risk of fluid leakage, which helps improve the reliability and safety of the heat exchange unit.

[0015] In the aforementioned heat exchange unit, the two heat exchange plates are symmetrically connected by welding, or one heat exchange plate is welded to another horizontally flipped heat exchange plate. The symmetrical or flipped arrangement of the two heat exchange plates can create different flow paths to meet different heat exchange requirements.

[0016] In the aforementioned heat exchange unit, the contact surface between the crests of one heat exchange plate and the crests of another heat exchange plate is partially or fully welded. Welding the flat surfaces at the tops of the two crests together ensures weld quality and improves overall structural reliability through sufficient welding area. The optional use of partial or full welding can further reduce production costs while maintaining overall structural strength.

[0017] The present invention relates to a heat exchange core, comprising at least two heat exchange units as described above, wherein the end faces of two adjacent heat exchange units are connected; and / or, at least two heat exchange units are also provided on the same plane, wherein the two adjacent heat exchange units are symmetrically arranged and connected at the side edges, and the main flow channels of the two adjacent heat exchange units are interconnected and correspond one to one.

[0018] The combination of multiple heat exchange units significantly increases the heat exchange area, thereby improving the overall heat exchange capacity. The wave crest and guide groove design inside each heat exchange unit has optimized the fluid flow and heat exchange effect, and the combination of multiple units further amplifies this effect. The heat exchange core is composed of multiple heat exchange units tightly connected, with a compact overall structure and a small footprint. This design enables the heat exchange core to achieve efficient heat exchange in a limited space, making it suitable for various space-constrained occasions.

[0019] In the aforementioned heat exchange core, the outer wall of the flow guide groove of a heat exchange plate in one heat exchange plate unit is welded to the outer wall of the flow guide groove of a heat exchange plate in another heat exchange plate unit. This welded connection creates a reliable sealing surface, ensuring a tight connection between the heat exchange plate units. This gives the heat exchange core greater structural strength when subjected to fluid pressure and temperature fluctuations, and reduces the risk of loosening or leakage caused by vibration or pressure changes.

[0020] In the aforementioned heat exchange core, the side edges of the heat exchange plates of two adjacent heat exchange units on the same plane are welded to the side edges of the heat exchange plates of the other unit. This welded connection provides the heat exchange core with greater structural rigidity. Through the welded side edges, a stable connection is formed between adjacent heat exchange units, effectively resisting deformation or displacement caused by factors such as fluid pressure, temperature changes, and external vibrations, thereby ensuring the overall stability of the heat exchange core and its long-term operational reliability.

[0021] Compared with existing technologies, this heat exchange plate design significantly improves heat exchange efficiency and service life by optimizing fluid flow paths, increasing heat exchange area, and improving flow uniformity and structural strength, while maintaining low manufacturing and maintenance costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a schematic diagram of the heat exchange plate structure of Example 1 provided by the present utility model.

[0023] Figure 2 It is a schematic diagram of the cross-sectional structure of the heat exchange plate of Example 1 provided by the present utility model.

[0024] Figure 3 This is a schematic structural diagram of a heat exchange unit according to a first embodiment of the present invention.

[0025] Figure 4 It is a schematic diagram of the cross-sectional structure of the heat exchange unit of Example 1 provided by the present utility model.

[0026] Figure 5 This is a schematic diagram of the refrigerant form inside the heat exchange unit of Example 1 provided by the present utility model.

[0027] Figure 6 This is a schematic structural diagram of the heat exchange unit according to the second embodiment of the present invention.

[0028] Figure 7 This is a schematic diagram of the cross-sectional structure of the heat exchange unit of Example 2 provided by the present utility model.

[0029] Figure 8 This is a schematic diagram of the refrigerant form inside the heat exchange unit of Example 2 provided by the present utility model.

[0030] Figure 9 This is a schematic cross-sectional structure diagram of the heat exchange unit of Example 3 provided by the present utility model.

[0031] Figure 10 This is a schematic diagram of the refrigerant form inside the heat exchange unit of Example 3 provided by the present utility model.

[0032] Figure 11 It is a schematic cross-sectional structure diagram of the heat exchange unit of Example 4 provided by the present utility model.

[0033] Figure 12 This is a schematic diagram of the refrigerant form inside the heat exchange unit of Example 4 provided by the present utility model.

[0034] Figure 13 This is a schematic diagram of the heat exchange core structure of Example 1 provided by the present utility model.

[0035] Figure 14 This is a schematic diagram of the heat exchange core structure of Example 5 provided by the present utility model.

[0036] Figure 15 This is a CFD flow trace diagram of Example 1 provided by the present utility model.

[0037] Figure 16 This is a schematic diagram of the heat exchange core structure of Example 6 provided by the present utility model.

[0038] Figure 17 This is a schematic diagram of the heat exchange core structure of Example 7 provided by the present utility model.

[0039] In the figure, the plate body 1, the main channel 11, the peak unit 2, the peak 21, the guide groove 22, the welding plane 221, the depression 23, the groove unit 3, the groove 31, the heat exchange plate 4, and the heat exchange unit 5. DETAILED DESCRIPTION

[0040] Example 1

[0041] like Figures 1 to 5 As shown in Figures 13 and 15, a heat exchange plate comprises a plurality of peak units 2 which are distributed laterally along the plate body 1 and have a discontinuous curve in the horizontal cross section, a groove unit 3 is formed between two adjacent peak units 2, the peak unit 2 comprises a plurality of peaks 21 which are distributed vertically along the plate body 1 and have an arc segment in the horizontal cross section, two adjacent peaks 21 are opposite to each other and a guide groove 22 is provided between the head and tail of the two adjacent peaks 21, a depression 23 which can be connected with the guide grooves 22 is provided between the two adjacent guide grooves 22, the groove unit 3 is connected with the depression 23 to form a main channel 11, and the two adjacent main channels 11 are connected through the guide groove 22.

[0042] In this embodiment, the refrigerant exchanges heat with the plate body 1 when flowing through the surface of the plate body 1. While flowing along the main channel 11, the refrigerant can also flow between the recesses 23 through the guide grooves 22, which can solve the problem of gas-liquid separation and bypass, and at the same time solve the lateral flow problem, thereby improving the heat exchange efficiency.

[0043] More specifically, the central axis of the guide groove 22 is parallel to or overlaps with the central axis of the crest unit 2 ; the horizontal cross section of the crest 21 is C-shaped; and the cross section of the guide groove 22 is trapezoidal.

[0044] More specifically, the groove unit 3 includes a groove 31 disposed between the crest 21 of one crest unit 2 and the crest 21 of another crest unit 2 between two adjacent rows of crest units 2 , and the groove 31 is communicated with the guide groove 22 .

[0045] More specifically, the top surface of the crest 21 is a plane, and the bottom of the recess 23 is provided with a welding plane 221 .

[0046] like Figures 3 to 5 As shown, the heat exchange unit 5 includes two heat exchange plates 4, which are connected and the guide grooves 22 are arranged inward.

[0047] In this embodiment, the two heat exchange plates 4 are connected by the guide grooves 22 facing inward, forming a flow channel between the two heat exchange plates 4, and the refrigerant exchanges heat while flowing through the flow channel; the two heat exchange plates 4 are symmetrical in structure and connected by welding.

[0048] More specifically, the contact surfaces of the wave crests 21 of one heat exchange plate and the wave crests 21 of another heat exchange plate are all welded.

[0049] like Figure 13 As shown, a heat exchange core includes at least two heat exchange units 5, the end faces of two adjacent heat exchange units 5 are connected, and the outer wall of the guide groove 22 of a heat exchange plate 4 of one heat exchange plate unit 5 is welded to the outer wall of the guide groove 22 of a heat exchange plate 4 of another heat exchange plate unit 5.

[0050] In this embodiment, two heat exchange units 5 form a heat exchange core, which can provide stronger thermal performance.

[0051] More specifically, the two heat exchange plates 4 of each heat exchange unit 5 are symmetrical in structure.

[0052] Example 2

[0053] The content of this embodiment is basically the same as that of the first embodiment, except that: Figures 6 to 8 As shown, one heat exchange plate 4 is horizontally rotated 180 degrees with another heat exchange plate 4 of symmetrical structure and then welded together.

[0054] In this embodiment, one heat exchange plate 4 is connected to another heat exchange plate 4 that is flipped 180 degrees by welding. Compared with the first embodiment, a flow channel with a different structure is formed between the two heat exchange plates 4.

[0055] Example 3

[0056] The content of this embodiment is basically the same as that of the first embodiment, except that: Figure 9 and 10 As shown, one heat exchange plate 4 is horizontally rotated 90 degrees to another heat exchange plate 4 with a symmetrical structure and then welded to each other.

[0057] More specifically, the contact surface between the wave crest 21 of one heat exchange plate and the wave crest 21 of another heat exchange plate is partially welded.

[0058] In this embodiment, one heat exchange plate 4 is horizontally rotated 90 degrees with another symmetrical heat exchange plate 4 and then welded together to form flow channels with different structures. The welding area is small and the production cost is lower.

[0059] Example 4

[0060] The content of this embodiment is basically the same as that of the first embodiment, except that: Figure 11 and 12 As shown, one heat exchange plate 4 is horizontally rotated 270 degrees with another heat exchange plate 4 of symmetrical structure and then welded together.

[0061] More specifically, the contact surface between the wave crest 21 of one heat exchange plate and the wave crest 21 of another heat exchange plate is partially welded.

[0062] In this embodiment, one heat exchange plate 4 is horizontally rotated 270 degrees with another symmetrical heat exchange plate 4 and then welded together to form flow channels with different structures. The welding area is small and the production cost is lower.

[0063] Example 5

[0064] The content of this embodiment is basically the same as that of the first embodiment, except that: Figure 14 As shown, the two heat exchange plates 4 of the heat exchange unit 5 are one heat exchange plate 4 and the other heat exchange plate 4 that is horizontally flipped.

[0065] Example 6

[0066] The content of this embodiment is basically the same as that of the first embodiment, except that: Figure 16 As shown, the heat exchange core has two adjacent heat exchange units 5 on the same plane, and the side edge of the heat exchange plate 4 of one heat exchange unit 5 is welded to the side edge of the heat exchange plate 4 of the other heat exchange unit 5 .

[0067] In this embodiment, two heat exchange units 5 on the same plane are horizontally welded to form a more stable structure of the heat exchange core in the same plane, which can better ensure the overall stability of the heat exchange core when subjected to fluid pressure and temperature changes.

[0068] Example 7

[0069] The content of this embodiment is basically the same as that of the first embodiment, except that: Figure 17 As shown, the heat exchange core has four adjacent heat exchange units 5 on the same plane, and the side edge of the heat exchange plate 4 of one heat exchange unit 5 is welded to the side edge of the heat exchange plate 4 of another heat exchange unit 5 .

[0070] The specific embodiments described herein are merely illustrative of the spirit of the present invention. Persons skilled in the art may make various modifications, additions, or substitutions to the described specific embodiments without departing from the spirit of the present invention or exceeding the scope defined by the appended claims.

[0071] Although this document frequently uses terms such as plate, main channel, crest unit, crest, guide groove, welding plane, depression, groove unit, groove, heat exchange plate, and heat exchange unit, the use of other terms is not excluded. These terms are used only to more conveniently describe and explain the essence of the present invention. Interpreting them as any additional limitation is contrary to the spirit of the present invention.

Claims

1. A heat exchange plate, characterized in that: The invention comprises a plurality of wave crest units (2) which are distributed transversely along the plate body (1) and whose horizontal cross sections are in the form of discontinuous curves, a groove unit (3) is formed between two adjacent wave crest units (2), the wave crest unit (2) comprises a plurality of wave crests (21) which are distributed vertically along the plate body (1) and whose horizontal cross sections are in the form of arc segments, the two adjacent wave crests (21) are in opposite directions to each other, and a guide groove (22) is provided between the head and tail of the two adjacent wave crests (21), a depression (23) which can be connected with the guide grooves (22) is provided between the two adjacent guide grooves (22), the groove unit (3) is connected with the depression (23) to form a main channel (11), and the two adjacent main channels (11) are connected through the guide groove (22).

2. The heat exchange plate according to claim 1, characterized in that The central axis of the guide groove (22) is parallel to or overlaps with the central axis of the peak unit (2); Alternatively, the central axis of the guide groove (22) is transversely perpendicular to the central axis of the peak unit (2); Alternatively, the central axis of the guide groove (22) is inclined to the central axis of the peak unit (2).

3. The heat exchange plate according to claim 1, characterized in that The horizontal cross section of the wave crest (21) is any one of a C-shape, a V-shape or a semi-ellipse.

4. The heat exchange plate according to claim 1, characterized in that The groove unit (3) comprises a groove (31) arranged between the crest (21) of one crest unit (2) and the crest (21) of another crest unit (2) between two adjacent rows of crest units (2), and the groove (31) is connected to the guide groove (22).

5. The heat exchange plate according to claim 1, characterized in that: The cross-sectional shape of the guide groove (22) is any one of a V-shape, a trapezoidal shape, a semicircular shape or an arc shape.

6. The heat exchange plate according to claim 1, characterized in that The top surface of the wave crest (21) is a plane.

7. The heat exchange plate according to any one of claims 1 to 6, characterized in that: A welding plane (221) is provided at the bottom of the recess (23).

8. A heat exchange unit, characterized in that: The heat exchange plate comprises two heat exchange plates (4) according to any one of claims 1 to 7, wherein the two heat exchange plates (4) are connected and the guide grooves (22) are arranged inwards.

9. The heat exchange unit according to claim 8, characterized in that The two heat exchange plates (4) are symmetrical in structure and connected by welding.

10. The heat exchange unit according to claim 8, characterized in that One heat exchange plate (4) is welded to another heat exchange plate (4) that has been flipped horizontally.

11. The heat exchange unit according to claim 9 or 10, characterized in that: The contact surfaces of the wave crests (21) on one heat exchange plate (4) and the wave crests (21) on another heat exchange plate are partially welded or completely welded.

12. A heat exchange core, characterized in that: comprising at least two heat exchange units (5) according to any one of claims 8 to 11, wherein the end faces of two adjacent heat exchange units (5) are connected; And / or, at least two heat exchange units (5) are also provided on the same plane, the two adjacent heat exchange units (5) are symmetrically arranged and connected at their sides, and the main channels (11) of the two adjacent heat exchange units (5) are interconnected and correspond one to one.

13. The heat exchange core according to claim 12, characterized in that: In two heat exchange units (5) connected at their end faces, the outer wall of the guide groove (22) of a heat exchange plate (4) of one heat exchange unit (5) is welded to the outer wall of the guide groove (22) of a heat exchange plate (4) of the other heat exchange unit (5).

14. The heat exchange core according to claim 12, characterized in that: In two adjacent heat exchange units (5) on the same plane, the side edge of the heat exchange plate (4) of one heat exchange unit (5) is welded to the side edge of the heat exchange plate (4) of the other heat exchange unit (5).

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