A tree corrugated plate water-water plate heat exchanger

Abstract

This invention relates to a tree-shaped corrugated plate water-to-water heat exchanger, belonging to the field of heat exchanger technology. It includes: plates with corner holes, a corrugated region in the center of the plates, a flow-guiding region between the corner holes and the corrugated region, and several main branches within the corrugated region. Each main branch includes two linear structures arranged at an α angle, and several branch structures are arranged on the linear structures of the main branches. The synergistic effect of the branch structures and the herringbone corrugated main branches accelerates and initially distributes the fluid as it flows through the main corrugations; upon entering the branch corrugations, the fluid from different directions collides and shears, generating large-scale vortices and achieving macroscopic mixing; thus forming a dual enhancement of "macroscopic turbulence + microscopic disturbance," significantly improving the heat transfer coefficient compared to a pure herringbone plate heat exchanger.

Description

Technical Field

[0001] This invention relates to a corrugated plate heat exchanger, belonging to the field of heat exchanger technology. Background Technology

[0002] Plate heat exchangers are highly efficient and compact heat exchange devices widely used in chemical, energy, refrigeration, food processing, and HVAC industries. Traditional plate heat exchangers consist of a series of stacked heat exchange plates, with fluid flowing within the channels between the plates for heat exchange. Plate heat exchangers can not only achieve the fluid temperature control required in industrial processes but also effectively recover waste heat. The heat exchange plates are the core components that complete the heat exchange between hot and cold fluids within the plate heat exchanger, directly determining the heat exchange efficiency and operating power consumption of the plate heat exchanger.

[0003] In existing technologies, heat exchange plates generally come in four forms: herringbone, straight corrugated, oblique corrugated, and irregularly shaped. Herringbone plates are the most widely used, but due to uneven distribution of flow channels between plates, local overheating often occurs. Compared with herringbone plates, straight corrugated plates have improved flow channels and reduced flow resistance, but their heat transfer efficiency decreases. For example, US20250102233A1 discloses a plate heat exchanger, which features a multi-segmented corrugated plate. The plate comprises at least two corrugated units to divide the plate into segments. Each segment includes a high-wave zone, a transition zone, and a centerline. The corrugation angles of adjacent segments can differ, and obstacles can be formed through phase shift and independent setting of the centerline height window. This allows for independent control of the flow paths and resistance of different fluids, enabling independent optimization of heat transfer coefficients and pressure drops for various fluids with different physicochemical properties. It achieves particularly high-efficiency heat exchange under low to medium flow rate conditions. However, the design operates at a segmented scale between macroscopic and microscopic levels, systematically managing and customizing flow through the combination of segments, phase shift, and window characteristics. It addresses the challenge of independently and precisely balancing heat transfer performance and flow resistance for various fluids with different characteristics, emphasizing design flexibility and customization. The invention, with publication number CN223376404U, entitled "A Plate Heat Exchanger with Unequal High and Low Heat Transfer Zones," discloses a technical solution where the plates are divided along the flow direction into a medium inlet zone, a medium middle zone, and a medium outlet zone. The angle between the corrugations and the centerline of each zone and its sub-zones (near end, middle end, far end) differs; for example, a greater than 60° angle indicates a high flow resistance zone, and a less than 40° angle indicates a low flow resistance zone, thus forming a preset high and low flow resistance distribution. Based on the flow and heat transfer requirements of the medium in different zones (inlet, middle, outlet) of the plates, different angles of corrugations are used to create unequal flow resistance zones, optimizing the overall plate flow distribution. This addresses the problem of uneven fluid distribution caused by varying flow path lengths, aiming to achieve overall flow balance. Therefore, it does not propose a technical solution to enhance fluid mixing. While the inclined corrugated plates balance heat transfer and flowability, they do not fully highlight the characteristics of the herringbone or inclined corrugated plate shape. To balance the heat transfer performance of plate heat exchangers and improve fluid flow resistance between plates, this invention proposes a tree-shaped corrugated irregular plate for water-to-water plate heat exchangers. The shortcomings and deficiencies of existing technologies are as follows: 1. The traditional corrugated plate has a simple flow channel structure and uneven fluid distribution, which leads to local thermal stress concentration and affects the service life of the equipment. 2. The corrugated shape of the plate has a weak ability to suppress fluid-induced vibrations, which can easily lead to structural fatigue; traditional corrugated plates also have problems with local flow dead zones and insufficient heat exchange area.

[0004] Therefore, there is an urgent need to propose a tree-shaped corrugated plate water-to-water plate heat exchanger to solve the above-mentioned technical problems. Summary of the Invention

[0005] To address the aforementioned problems, a tree-shaped corrugated plate water-to-water plate heat exchanger is provided. A brief overview of the invention is given below to provide a basic understanding of certain aspects of the invention. It should be understood that this overview is not an exhaustive summary of the invention. It is not intended to identify key or essential parts of the invention, nor is it intended to limit the scope of the invention.

[0006] The technical solution of this invention: A tree-shaped corrugated plate water-to-water plate heat exchanger includes: corner holes on the plates, a corrugated region in the middle of the plates, a flow guiding region between the corner holes and the corrugated region, several main branches in the corrugated region, each main branch including two linear structures arranged at an α angle, and several branch structures on the linear structures of the main branches.

[0007] Preferably, several branch structures are evenly arranged along the linear structure of the main trunk, and the branch structures on both sides of the main trunk are staggered.

[0008] Preferably, the linear structure of the main trunk is inclined on both the water-facing and back-facing sides, and the length of the branch structure is 0.2-2 times the width of the main trunk.

[0009] Preferably, the corrugated area is hexagonal, and the tip of the main stem is set to correspond to the input side of the plate.

[0010] Preferably, a sealing gasket is provided on the plate, and several plates are stacked in sequence to form a corrugated plate group, in which one plate is set at 180° with the adjacent plate.

[0011] Preferably, the main trunk and branch structures on the plate are formed by stamping, and a recess is formed on the back of the protruding structure. The positions of the branch structures on adjacent plates differ by Δh, and the branch structures between adjacent plates do not overlap.

[0012] Preferably, it further includes: a first outer plate, a first tie rod, a cold fluid outlet, a cold fluid inlet, a hot fluid outlet, a hot fluid inlet, and a second outer plate. The first outer plate and the second outer plate are respectively located on both sides of the corrugated plate assembly. The first outer plate and the second outer plate clamp and fix the corrugated plate assembly by the evenly arranged first tie rod.

[0013] Preferably, the second outer plate is provided with a first outlet corner hole, a first inlet corner hole, a second inlet corner hole, and a second outlet corner hole at positions corresponding to the four corner holes. The four corner holes of the stacked plates form a cold fluid outlet on the right side, a cold fluid inlet on the right side, a hot fluid outlet on the left side, and a hot fluid inlet on the left side of the corrugated plate group. The first outlet corner hole is connected to the cold fluid outlet, the first inlet corner hole is connected to the cold fluid inlet, the second inlet corner hole is connected to the hot fluid inlet, and the second outlet corner hole is connected to the hot fluid outlet.

[0014] Preferably, it also includes a second pull rod, and the two ends of the plate are provided with arc-shaped notches, and the second pull rod passes through the second outer plate, the arc-shaped notches, and the first outer plate.

[0015] The present invention has the following beneficial effects: The synergistic effect of the branch structure and the herringbone corrugated main body of this invention accelerates and initially distributes the fluid as it flows through the main corrugated body; after entering the branch corrugated body, the fluid from different directions collides and shears with each other, generating large-scale vortices and achieving macroscopic mixing; forming a dual enhancement of "macroscopic turbulence + microscopic disturbance", the heat transfer coefficient is significantly improved compared with the pure herringbone plate heat exchanger. The tree-like fractal flow channel network of the present invention ensures that the fluid can be automatically and rationally distributed from the main channel to each branch channel, covering the edges and corners of the plate. This design avoids the "flow channel short circuit" and "flow dead zone" phenomena commonly found in traditional corrugated plates from the root, making the temperature and heat load distribution on the plate surface more uniform, which not only improves the overall heat exchange efficiency, but also alleviates local thermal stress.

[0016] The manufacturing process of this invention is feasible and economical. It adopts a "one-time stamping forming" process, in which tree-like branches and corrugations are formed simultaneously, without the need for secondary processing. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of a tree-shaped corrugated plate water-to-water plate heat exchanger.

[0018] Figure 2 This is an exploded view of a tree-shaped corrugated plate water-to-water plate heat exchanger.

[0019] Figure 3 This is a front view of adjacent plates.

[0020] Figure 4 It is a reverse view of adjacent plates.

[0021] Figure 5 This is a three-dimensional view of a tree-shaped corrugated plate water-to-water heat exchanger.

[0022] Figure 6 This is a rear view of a tree-shaped corrugated plate water-to-water heat exchanger.

[0023] Figure 7 This is a schematic diagram of a tree-shaped corrugated plate water-to-water plate heat exchanger. Detailed Implementation

[0024] To make the objectives, technical solutions, and advantages of this invention clearer, the invention is described below with reference to specific embodiments shown in the accompanying drawings. However, it should be understood that these descriptions are merely exemplary and not intended to limit the scope of the invention. Furthermore, descriptions of well-known structures and technologies are omitted in the following description to avoid unnecessarily obscuring the concept of the invention.

[0025] Specific implementation method one: Combining Figure 1-7 This embodiment describes a tree-shaped corrugated plate water-to-water plate heat exchanger, comprising: a corner hole 18 at each of the four corners of a square plate; a corrugated region 11 in the middle of the plate; a flow guiding region 17 between the corner holes 18 and the corrugated region 11; the flow guiding region 17 having several radial linear protrusions; the upper left corner hole communicating with the corrugated region through the upper left flow guiding region; the corrugated region communicating with the lower left corner hole through the lower left flow guiding region; and so on on the right side. The corrugated region 11 contains... Several uniformly arranged main trunks 12 are provided. The main trunks 12 are symmetrical herringbone structures. Each main trunk 12 includes two linear structures arranged at an angle α to the X direction. Several branch structures 13 are provided on the linear structures of the main trunks 12. The branch structures 13 are symmetrically arranged with Y as the center. The plates are tree-shaped composite corrugated plates. The heat exchange area (corrugated area) of the plates is composed of periodically arranged herringbone units. This area includes the herringbone main trunk and the branch structures 13 extending from the inclined surface of the main trunk, forming a tree-shaped flow channel network. This invention addresses the problems of uneven fluid distribution, localized thermal stress, flow dead zones, and vibration fatigue in traditional corrugated plates. It pursues an integrated design of "geometric adaptation, flow synergy, heat transfer enhancement, and structural reliability." It introduces branching corrugations on the herringbone main corrugation to form a tree-like fractal flow channel network, thereby optimizing the micro-flow field on the plate surface and enhancing fluid mixing and disturbance.

[0026] Specific Implementation Method Two: Combining Figure 1-7 This embodiment describes a tree-shaped corrugated plate water-to-water plate heat exchanger. The tree-shaped branch structure 13 can be configured as a straight protrusion perpendicular to the center line Y, or the angle between the branch and the main trunk can be 15°–45°, with a length 0.2–2 times the width of the main trunk. Several branch structures 13 are evenly arranged along the linear structure (inclined straight protrusion structure) of the main trunk 12. The branch structures 13 on the water-facing side and the branch structures 13 on the back side of the same main trunk 12 are staggered in the linear structure direction, for example… Figure 3As shown on the left, taking the linear structure on the left side of the main trunk 12 in the first row as an example, there are five branch structures 13 on the water-facing side, and one branch structure is set on the back side between adjacent water-facing branch structures. There are a total of four branch structures 13 on the back side. Several main trunks 12 are evenly arranged along the Y direction so that the adjacent branch structures 13 are staggered. The heat exchange efficiency of this invention is extremely high. The tree structure generates a dual enhancement of "macro-turbulence + micro-disturbance". Through the structural characteristics of the creative tree-like flow channel network, the impact force of the fluid on the plate is dispersed, while the continuous and severe destruction of the water boundary layer is achieved. The tree-like fractal flow channel network of the present invention ensures that the fluid can be automatically and rationally distributed from the main channel to each branch channel, covering the edges and corners of the plate. This design avoids the "flow channel short circuit" and "flow dead zone" phenomena commonly found in traditional corrugated plates from the root, making the temperature and heat load distribution on the plate surface more uniform, which not only improves the overall heat exchange efficiency, but also alleviates local thermal stress.

[0027] Specific implementation method three: Combining Figure 1-7 This embodiment describes a tree-shaped corrugated plate water-to-water plate heat exchanger. The linear structure of the main trunk 12 has both its water-facing and water-returning surfaces (inlet and outlet sides) inclined. Specifically, the cross-section of the linear structures on both sides of the herringbone main trunk 12 is a triangular protruding structure. One end of the branch structure 13 connects to the protruding tip of the main trunk 12 (e.g., at...). Figure 2 The branch structure 13 is connected to the upper side of the main trunk 12, and the other end of the branch structure 13 does not contact the adjacent main trunk 12. The length of the branch structure 13 is 0.2-2 times the width of the linear structure of the herringbone main trunk 12. The present invention innovates at the micro-channel scale and solves the problems of extremely uniform fluid distribution and extreme heat transfer enhancement through intense mixing by perturbing the flow field through fractal geometry inside a single corrugated unit.

[0028] Specific implementation method four: Combination Figure 1-7 This embodiment describes a tree-shaped corrugated plate water-to-water plate heat exchanger. The corrugated region 11 is hexagonal, and the tips of the main stems 12 within the hexagonal corrugated region 11 correspond to the input side of the plates. That is, the two tips of the hexagonal corrugated region 11 are located in the plate input-to-output direction. Figure 5 On the center line Y (upper and lower), the corrugated area 11 is a hexagon symmetrically arranged with respect to the center line Y. The middle edge of the corrugated area 11 is parallel to the center line Y. The herringbone main body 12 ( Figure 5 The linear structures on both sides (left and right) are arranged parallel to the two end slopes of the corrugated area 11 input side, and the structures on both sides of the herringbone trunk 12 near the output side are shortened according to the shape of the end slopes of the hexagonal output side. This invention significantly improves heat exchange efficiency: the synergistic effect of the branch structure and the herringbone corrugated main body accelerates and initially distributes the fluid as it flows through the main corrugated body; after entering the branch corrugated body, the fluid from different directions collides and shears with each other, generating large-scale vortices and achieving macroscopic mixing; forming a dual enhancement of "macroscopic turbulence + microscopic disturbance", the heat transfer coefficient is significantly improved compared with pure herringbone plate heat exchangers.

[0029] Specific Implementation Method Five: Combining Figure 1-7 This embodiment describes a tree-shaped corrugated plate water-to-water plate heat exchanger. Each plate is equipped with a sealing gasket 9. Several plates are stacked sequentially to form a corrugated plate group 1. In the corrugated plate group 1, one plate is positioned at 180° to the adjacent plate 1. This can be understood as follows: Figure 3 or Figure 4 The left-side plate 1 shown is marked as the original position of a plate. The adjacent plate rotates 180° around its center to form the right-side plate 1. The sealing gasket on the plate also rotates with it.

[0030] Specific Implementation Method Six: Combination Figure 1-7 This embodiment describes a tree-shaped corrugated plate water-to-water plate heat exchanger, such as... Figure 3 As shown, the main trunk 12 and branch structures 13 on the plates are formed by stamping, which is convenient for processing. A recess is formed on the back of the raised structure. The positional difference between the branch structures 13 on adjacent plates is Δh = 4.13-4.2 mm, ensuring that adjacent branch structures 13 do not overlap. When the fluid passes through adjacent plates, the raised and recessed structures on both sides of the fluid generate a pressure difference, pushing the fluid to deflect. A small-scale backflow zone is formed when the fluid passes through the recessed branch structure on the back. The stable main flow and the multi-point distributed backflow interact, significantly increasing the intensity of turbulence. The fluid distribution is extremely uniform; the tree-like fractal structure automatically distributes the fluid to every corner of the plate. This invention fundamentally eliminates flow dead zones and short circuits. Regarding vibration and fatigue resistance, the invention utilizes a branched structure to perform secondary cutting and guidance of the fluid, generating strong local eddies and lateral (Y and Z) mixing. Considering factors such as contact area and fluid flow, it not only enhances heat transfer but also, through its innovative structural design, allows for one-time stamping, facilitating manufacturing and controlling production and usage costs, thus improving heat transfer efficiency and possessing significant economic and promotional value. The complex tree-like structure enhances plate stiffness and the ability to suppress fluid disturbances, optimizing flow distribution while simultaneously suppressing vibration and enhancing fluid mixing.

[0031] Specific implementation method seven: Combination Figure 1-7This embodiment describes a tree-shaped corrugated plate water-to-water plate heat exchanger, which further includes: a first outer plate 2, a first tie rod 3, a cold fluid outlet 10, a cold fluid inlet 14, a hot fluid outlet 15, a hot fluid inlet 16, and a second outer plate 20. The first outer plate 2 and the second outer plate 20 serve as clamping plates located on both sides of the corrugated plate assembly 1. The first outer plate 2 and the second outer plate 20 clamp and fix the corrugated plate assembly 1 by the evenly arranged first tie rods 3. The first tie rod 3 includes a bolt and a nut, and the first tie rod 3 passes through the first outer plate 2 and the second outer plate 20 and is threadedly connected to the nut.

[0032] Specific implementation method eight: Combination Figure 1-7 This embodiment describes a tree-shaped corrugated plate water-to-water plate heat exchanger. The second outer plate 20 has four corner holes 18 corresponding to a first outlet corner hole 5, a first inlet corner hole 7, a second inlet corner hole 6, and a second outlet corner hole 8. The first outlet corner hole 5 can be a cold fluid outlet corner hole, the first inlet corner hole 7 can be a cold fluid inlet corner hole, the second inlet corner hole 6 can be a hot fluid inlet corner hole, and the second outlet corner hole 8 can be a hot fluid outlet corner hole. Flanges 4 are provided at the outlet and inlet corner holes. The four corner holes 18 of several stacked plates form a cold fluid outlet 10 on the right side of the corrugated plate group 1, a cold fluid inlet 14 on the right side, a hot fluid outlet 15 on the left side, and a hot fluid inlet 16 on the left side. The first outlet corner hole 5 communicates with the cold fluid outlet 10, the first inlet corner hole 7 communicates with the cold fluid inlet 14, the second inlet corner hole 6 communicates with the hot fluid inlet 16, and the second outlet corner hole 8 communicates with the hot fluid outlet 15.

[0033] Specific Implementation Method Nine: Combining Figure 1-7 This embodiment describes a tree-shaped corrugated plate water-to-water plate heat exchanger, which also includes a second tie rod 21. The plates have arc-shaped notches 19 at the middle of both ends in the Y direction. The second tie rod 21 passes through the second outer plate 20, the arc-shaped notches 19, and the first outer plate 2 to fix the corrugated plate assembly 1 neatly, which is convenient for installation. The structure of the second tie rod 21 is the same as that of the first tie rod 3.

[0034] Example 1: Combination Figures 1-7 The tree-shaped corrugated plate heat exchanger of this embodiment is a plate heat exchanger with a herringbone trunk and branching plates. The plates include the plate body, and the heat exchange area of ​​the plates is composed of periodically arranged herringbone units. The herringbone unit includes a herringbone trunk, which is composed of two trunk slopes (sloping walls on a linear structure, including a water-facing side and a water-returning side) that intersect at a certain angle. On one or two trunk slopes of the herringbone trunk, a branching structure extending from the slope is provided.

[0035] The bifurcated branch structure consists of branch ribs protruding from the inclined surface of the main trunk.

[0036] The bifurcated branch structure forms a non-zero angle with the centerline of the herringbone trunk slope, with a branch angle of 15°-45°.

[0037] The bifurcated branch structures on the same herringbone-shaped main slope are multiple and arranged sequentially along the direction of fluid flow.

[0038] like Figure 7 The direction of the middle arrow indicates the flow direction. Along the fluid flow direction, adjacent branch structures are arranged in an alternating pattern on the main slope.

[0039] The length of the bifurcated branch structure is 0.2-2 times the width of the herringbone trunk.

[0040] The bifurcated branch structures on the two main inclined surfaces of the herringbone-shaped trunk have the same distribution density, branch angle, or length.

[0041] The plate is stacked with the same plate after being rotated 180°, so that the herringbone-shaped main body of the two plates supports each other and forms a complex cross flow channel.

[0042] like Figure 5 and Figure 7 As shown, the heat exchange area of ​​the plate in this embodiment is composed of periodically arranged herringbone units. Each herringbone unit includes a herringbone trunk, which is composed of two inclined surfaces of the trunk at a certain angle.

[0043] like Figure 7 As shown, the bifurcated branch structure is set on both main inclined surfaces, and the branches on both sides are staggered; in addition, the branch structure is in the form of protruding ribs, and its branch angle is 15°-45°; this design can generate stronger lateral mixing in the flow channel.

[0044] like Figure 7As shown, the fluid does not flow in a straight line, but is forced to flow along the inclined wall of the herringbone-shaped main channel, resulting in a zigzag overall flow path and generating a large-scale spiral secondary flow perpendicular to the main flow direction. When the fluid flows along the inclined surface of the main channel, some of the fluid, especially the low-velocity fluid near the wall, enters the bifurcation structure 13. Because the bifurcation branches form a certain angle with the centerline of the inclined surface of the main channel, the flow direction of this part of the fluid is changed again. At the instants when the fluid flows into, through, and out of the bifurcation branches, strong local vortices are generated due to the sudden change in the flow cross-section and the sharp deflection of the direction. These vortices-carrying fluids, after flowing out of the bifurcation branches, collide at high speed and merge into the main flow of the main channel. The bifurcation structure is arranged periodically along the flow direction. This process generates a series of smaller vortices, increasing the mixing between fluids and lengthening the actual flow path of the fluid on the heat exchange surface. These three factors work together to greatly enhance the heat exchange process.

[0045] Example 2: Combination Figures 1-7 The tree-shaped corrugated plate heat exchanger of this embodiment includes a tree-shaped composite corrugated plate 1, two outer plates, a first tie rod 3 (clamping bolt), a flange 4, and a sealing gasket 5; Assembly process: Stack 20 plates at intervals using sealing gaskets 5 (alternating arrangement of cold and hot runners), fix them on both sides with 15mm thick carbon steel clamping plates (first outer plate 2, second outer plate 20), and lock them in place with 10 M20 clamping bolts (eight first tie rods 3, two second tie rods 21). Align flange 4 with the corner holes of the plates to complete the assembly.

[0046] It should be noted that in the above embodiments, as long as the technical solutions are not contradictory, they can be permuted and combined. Those skilled in the art can exhaust all possibilities based on the mathematical knowledge of permutation and combination. Therefore, the present invention will not describe the technical solutions after permutation and combination one by one, but it should be understood that the technical solutions after permutation and combination have been disclosed by the present invention.

[0047] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A tree-shaped corrugated plate water-to-water plate heat exchanger, comprising plates, wherein corner holes (18) are provided on the plates, a corrugated region (11) is provided in the middle of the plates, and a flow guiding region (17) is provided between the corner holes (18) and the corrugated region (11), characterized in that: The corrugated area (11) is provided with several herringbone-shaped main trunks (12). The herringbone-shaped main trunks (12) include two linear structures arranged at an angle α. Several branch structures (13) are provided on the linear structures of the herringbone-shaped main trunks (12). The corrugated region (11) includes a herringbone trunk (12) and branch structures (13) extending from the slope of the trunk, forming a tree-like flow channel network; The angle between the branch structure (13) and the trunk is 15°–45°; Several branch structures (13) are evenly arranged along the linear structure of the herringbone trunk (12), and the branch structures (13) on both sides of the herringbone trunk (12) are staggered. A sealing gasket (9) is provided on the plate. Several plates are stacked in sequence to form a corrugated plate group (1). In the corrugated plate group (1), one plate is set at 180° with the adjacent plate. The herringbone-shaped main trunk (12) and branch structures (13) on the plate are formed by stamping. Several branch structures (13) are raised along the linear structure of the herringbone-shaped main trunk (12), and a depression is formed on the back of the raised structure. The positions of the branch structures (13) on adjacent plates differ by Δh, and the branch structures (13) between adjacent plates do not overlap. The synergistic effect of the branch structure (13) and the herringbone trunk (12) causes the fluid to be accelerated and initially distributed when it flows through the herringbone trunk (12); after entering the branch structure (13), the fluids from different directions collide and shear each other, generating large-scale vortices. When the fluid passes through adjacent plates, the convex and concave structures on both sides of the fluid generate a pressure difference, which pushes the fluid to deflect. When the fluid passes through the concave structure on the back, a small-scale backflow zone is formed. The stable main flow and the multi-point distributed backflow interact with each other, significantly increasing the intensity of turbulence. The fluid distribution is extremely uniform, and the tree-like fractal structure automatically distributes the fluid to every corner of the plate, fundamentally eliminating flow dead zones and short circuits.

2. The tree-shaped corrugated plate water-to-water plate heat exchanger according to claim 1, characterized in that: The linear structure of the herringbone trunk (12) is inclined on both sides, and the length of the branch structure (13) is 0.2-2 times the width of the herringbone trunk (12).

3. A tree-shaped corrugated plate water-to-water plate heat exchanger according to claim 2, characterized in that: The corrugated area (11) is hexagonal, and the tip of the herringbone main body (12) is set to correspond to the input side of the plate.

4. A tree-shaped corrugated plate water-to-water plate heat exchanger according to claim 3, characterized in that: Also includes: The first outer plate (2), the first tie rod (3), the cold fluid outlet (10), the cold fluid inlet (14), the hot fluid outlet (15), the hot fluid inlet (16) and the second outer plate (20) are respectively located on both sides of the corrugated plate assembly (1). The first outer plate (2) and the second outer plate (20) clamp and fix the corrugated plate assembly (1) by the evenly arranged first tie rod (3).

5. A tree-shaped corrugated plate water-to-water plate heat exchanger according to claim 4, characterized in that: The second outer plate (20) is provided with a first outlet corner hole (5), a first inlet corner hole (7), a second inlet corner hole (6), and a second outlet corner hole (8) respectively, corresponding to the four corner holes (18). The four corner holes (18) of several stacked plates form a cold fluid outlet (10) on the right side of the corrugated plate group (1), a cold fluid inlet (14) on the right side, a hot fluid outlet (15) on the left side, and a hot fluid inlet (16) on the left side. The first outlet corner hole (5) is connected to the cold fluid outlet (10), the first inlet corner hole (7) is connected to the cold fluid inlet (14), the second inlet corner hole (6) is connected to the hot fluid inlet (16), and the second outlet corner hole (8) is connected to the hot fluid outlet (15).

6. A tree-shaped corrugated plate water-to-water plate heat exchanger according to claim 5, characterized in that: It also includes a second pull rod (21), and the two ends of the plate are provided with arc-shaped notches (19). The second pull rod (21) passes through the second outer plate (20), the arc-shaped notches (19), and the first outer plate (2).

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