A mixing and splitting device and heat exchanger assembly

Abstract

This invention discloses a mixing and flow-dividing device and a heat exchanger assembly. The mixing and flow-dividing device includes an inlet pipe, a primary flow-dividing structure, a secondary flow-dividing structure, and an outlet pipe. Through a differential mixing layout, it effectively neutralizes distribution differences in various spatial directions, allowing flow deviations and gas-liquid ratio deviations in vertical, horizontal, and different orientations to compensate and cancel each other out. The secondary flow-dividing is not a simple redistribution, but a re-collection and equalization based on the primary flow-dividing. The secondary flow-dividing, through interval selection and cross-directional collection, precisely compensates for the distribution deviations caused by different orientations in the primary flow-dividing, significantly reducing the adverse effects of gravity and external acceleration on fluid distribution. This achieves a stable and uniform distribution of the gas-liquid two-phase refrigerant under any orientation and vehicle acceleration conditions.

Description

Technical Field

[0001] This invention relates to the field of flow divider technology, and more particularly to a mixing flow divider device and heat exchanger assembly. Background Technology

[0002] The flow distribution structure is one of the core components for achieving efficient heat exchange in plate heat exchangers and various heat exchange equipment. Its main function is to evenly distribute the refrigerant or heat exchange medium into each independent flow channel, ensuring that the medium velocity, flow rate, and heat exchange state in each channel remain stable and consistent. For gas-liquid two-phase refrigerants, the uniformity of the liquid distribution directly determines the overall heat exchange efficiency, pressure loss, and operational stability of the heat exchanger. Due to the significant density difference between the gas and liquid phases, flow inertia, velocity distribution, and channel resistance all significantly affect the distribution effect. An ideal flow distribution structure must balance channel consistency, medium uniformity, and structural reliability. The design rationality, manufacturing precision, and assembly process of the flow distribution structure together determine the uniformity of medium distribution in the multi-channel parallel heat exchange process, which is a key factor affecting the overall performance of the heat exchanger.

[0003] Currently, traditional plate heat exchangers and similar heat exchange equipment generally suffer from uneven flow distribution between flow channels. The medium distribution is not only significantly affected by gravity, but also, in vehicle-mounted operation scenarios, by continuous disturbances from lateral, longitudinal, and vertical vehicle acceleration, further exacerbating the distribution deviation. Due to factors such as the large density difference between the gas and liquid phases and manufacturing errors in the geometry of each flow channel, it is difficult to achieve uniform flow distribution between the channels, easily leading to localized over / underflow and uneven heat exchange.

[0004] Therefore, there is an urgent need to propose a mixing and splitting device and heat exchanger assembly to solve the above problems. Summary of the Invention

[0005] The purpose of this invention is to provide a mixing and diversion device that effectively eliminates the adverse effects of gravity and acceleration on fluid distribution, and achieves full mixing and homogenized distribution of gas-liquid two-phase refrigerant.

[0006] To achieve this objective, the present invention adopts the following technical solution: A hybrid flow splitter includes: Inlet pipe, used to receive refrigerant; A single-flow splitting structure includes multiple splitting pipelines. One end of the inlet pipeline is connected to multiple splitting pipelines respectively. The cross-section of the splitting inlet of each splitting pipeline is equal, and the multiple splitting inlets are evenly distributed along the circumference of the inlet pipeline. The secondary diversion structure includes at least two manifolds, and at least two equally spaced diversions are connected to the same manifold. The outlet pipe is connected to the inlet of the collection pipe.

[0007] Preferably, the secondary diversion structure also includes a shell, multiple manifolds are located inside the shell and are evenly distributed along the circumference of the shell, the diversion pipes are sandwiched between the inner wall of the shell and the manifolds, and the manifolds have at least two manifold inlets on the side facing the diversion pipes, and the diversion pipes are connected to the manifolds through the manifold inlets.

[0008] Preferably, the axis of the manifold is parallel to the axis of the housing, and multiple branch pipes spirally surround the outer wall of the manifold.

[0009] Preferably, at least two manifold inlets are spaced apart along the axial direction of the manifold.

[0010] Preferably, the number of collection inlets and the number of branch pipes are equal and correspond one-to-one, and the number of branch pipes is an integer multiple of the number of collection pipes.

[0011] Preferably, the outlet pipe is installed in the shell and connected to the manifold, and the number of outlet pipes is not greater than the number of manifolds.

[0012] Preferably, the mixing and diversion device is a cylindrical structure, with the inlet pipe located at the end of the cylindrical structure, and the axis of the inlet pipe coincides with the axis of the cylindrical structure.

[0013] Preferably, the outlet pipe is located at the other end of the cylindrical structure.

[0014] Preferably, the mixing and diversion device is a one-piece molded part.

[0015] Another objective of this invention is to provide a heat exchanger assembly that eliminates the adverse effects of gravity and multi-directional acceleration on fluid distribution through a built-in mixing and diversion device, thereby achieving sufficient disturbance mixing and homogeneous distribution of the gas-liquid two-phase refrigerant and ensuring uniform and consistent medium distribution in each flow channel of the heat exchanger.

[0016] To achieve this objective, the present invention adopts the following technical solution: A heat exchanger assembly includes a heat exchanger and the aforementioned mixing and splitting device, wherein the manifold is connected to the inlet of the heat exchanger via an outlet pipe.

[0017] The beneficial effects of this invention are: This invention provides a mixing and distribution device, including an inlet pipe, a primary distribution structure, a secondary distribution structure, and an outlet pipe. Through a differential mixing layout, the gas-liquid two-phase refrigerant in the inlet pipe is initially distributed into sixteen distribution pipes, completing the primary liquid separation. Due to differences in spatial distribution, gravity, and multi-directional acceleration, the refrigerant in each distribution pipe exhibits significant differences in flow path, local resistance, and phase distribution, resulting in significant unevenness in the refrigerant mass flow rate and gas-liquid ratio within each distribution pipe. After the primary liquid separation, the refrigerant flow rate deviation in each distribution pipe is large, failing to directly meet the requirements for uniform heat exchange. Subsequently, the sixteen distribution pipes are merged into a single pipe every four pipes according to an equidistant interval rule, achieving secondary liquid separation. This merging method effectively neutralizes the spatial distribution differences in various directions, allowing flow rate deviations and gas-liquid ratio deviations in vertical, horizontal, and different orientations to compensate and cancel each other out. Secondary liquid separation is not simply a redistribution, but a recollection and equalization based on primary liquid separation, ultimately converging into four manifolds, significantly reducing the differences in flow rate and phase state between each manifold. Primary liquid separation employs a ring-shaped, uniformly distributed layout, ensuring that the sixteen branch pipes are angularly uniform and structurally symmetrical in the circular space, with only the orientation being a variable. Secondary liquid separation, through interval selection and cross-directional convergence, precisely compensates for the distribution deviation caused by the different orientations in primary liquid separation, significantly mitigating the adverse effects of gravity and external acceleration on fluid distribution. This achieves stable and uniform distribution of the gas-liquid two-phase refrigerant under any orientation and vehicle acceleration conditions.

[0018] This invention also provides a heat exchanger assembly, including a heat exchanger and the aforementioned mixing and distribution device, wherein the manifold is connected to the inlet of the heat exchanger via an outlet pipe. The refrigerant undergoes thorough disturbance, shearing, and homogenization mixing within the device, resulting in a more uniform phase distribution. It is then distributed step-by-step to each branch via a precisely symmetrical flow channel structure, ensuring a high degree of consistency in the medium flow rate, gas-liquid ratio, and flow state entering each channel of the heat exchanger. This significantly improves upon problems such as flow deviation, unevenness, and localized overheating that are prone to occur in traditional liquid-liquid separation structures, greatly enhancing the heat exchanger's adaptability under complex operating conditions, varying orientations, and varying accelerations, and effectively improving heat exchange uniformity and overall heat exchange efficiency. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of the mixing and diversion device provided in this embodiment; Figure 2 yes Figure 1 A sectional view; Figure 3 This is a schematic diagram of the primary flow splitting structure provided in the embodiment; Figure 4 yes Figure 3 A sectional view; Figure 5This is a schematic diagram of the secondary flow splitting structure provided in this embodiment; Figure 6 yes Figure 5 Cross-section Figure 1 ; Figure 7 yes Figure 5 Cross-section Figure 2 ; Figure 8 This is a schematic diagram of the distribution of the branch pipes and the collection pipes provided in this embodiment.

[0020] In the picture: 10. Inlet pipe; 20. Primary diversion structure; 21. Diversion pipe; 211. Diversion inlet; 30. Secondary diversion structure; 31. Combining pipe; 311. Combining inlet; 312. Combining outlet; 32. Shell; 40. Outlet pipe. Detailed Implementation

[0021] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, and not all of the structures.

[0022] In the description of this invention, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0023] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0024] In the description of this embodiment, the terms "upper," "lower," "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the present invention. In addition, the terms "first" and "second" are used only for distinction in description and have no special meaning.

[0025] This embodiment provides a mixing and diversion device that effectively eliminates the adverse effects of gravity and acceleration on fluid distribution, and achieves full mixing and homogenized distribution of gas-liquid two-phase refrigerant.

[0026] Specifically, such as Figures 1 to 7 As shown, a mixing and diversion device includes an inlet pipe 10, a primary diversion structure 20, a secondary diversion structure 30, and an outlet pipe 40. The inlet pipe 10 receives refrigerant. The primary diversion structure 20 includes multiple diversion pipes 21, one end of which is connected to each of the multiple diversion pipes 21. The diversion inlets 211 of each diversion pipe 21 have equal cross-sections, and the multiple diversion inlets 211 are evenly distributed circumferentially along the inlet pipe 10. In this embodiment, the number of diversion pipes 21 is sixteen. In other embodiments, the number of diversion pipes 21 can be eight or 32, etc. It should be noted that, for ease of understanding, this embodiment uses sixteen diversion pipes 21 as an example for discussion; this explanation is intended to avoid misunderstanding. The total flow rate of the gas-liquid two-phase refrigerant transported in the inlet pipe 10 is precisely divided into sixteen equal parts, so that each branch pipe 21 receives refrigerant with consistent flow rate and similar state. The uniform initial splitting of the gas-liquid two-phase refrigerant is completed before entering the heat exchange channel, ensuring that the distribution of each branch pipe 21 is balanced and stable.

[0027] The secondary distribution structure 30 includes at least two manifolds 31, with at least two equally spaced branch pipes 21 connected to the same manifold 31. In this embodiment, there are four manifolds 31; in other embodiments, the number of manifolds 31 can be two or eight, etc. From the sixteen branch pipes 21, one is selected from every four adjacent branch pipes 21 and connected to the manifold 31, forming four independent manifolds 31. Through a uniformly spaced arrangement, the four branch pipes 21 are respectively merged into the corresponding manifold 31, completing the stable secondary distribution of the gas-liquid two-phase refrigerant and further improving the uniformity of distribution.

[0028] The outlet pipe 40 and the collector outlet 312 of the collector pipe 31 are connected to the inlet of the outlet pipe 40, so that the gas-liquid two-phase refrigerant that has been fully mixed and evenly distributed is stably discharged from the mixing and distribution device, providing a uniform medium supply for each flow channel of the subsequent heat exchanger.

[0029] Through a differential mixing layout, the gas-liquid two-phase refrigerant in the inlet pipe 10 is initially distributed into sixteen branch pipes 21, completing the first liquid separation. Due to differences in spatial distribution, gravity, and multi-directional acceleration, the refrigerant in each branch pipe 21 exhibits significant differences in flow path, local resistance, and phase distribution, resulting in significant unevenness in the mass flow rate and gas-liquid ratio of the refrigerant in each branch pipe 21. After the first liquid separation, the flow rate deviation of the refrigerant in each branch pipe 21 is large, failing to directly meet the requirements for uniform heat exchange. Subsequently, the sixteen branch pipes 21 are merged into one branch pipe every four according to an equidistant interval rule, achieving a second liquid separation. This merging method effectively neutralizes the distribution differences in various spatial directions, allowing the flow rate deviations and gas-liquid ratio deviations in vertical, horizontal, and different orientations to compensate and cancel each other out. The second liquid separation is not a simple redistribution, but a re-collection and equalization based on the first liquid separation, ultimately converging to form four manifolds 31, significantly reducing the differences in flow rate and phase state between each branch. The primary distributor employs a ring-shaped, uniformly distributed layout, ensuring that the sixteen branch pipes 21 are angularly uniform and structurally symmetrical in the circular space, with only the orientation being a variable. The secondary distributor, through intermittent selection and cross-directional convergence, precisely compensates for the distribution deviation caused by the orientation difference in the primary distributor, significantly reducing the adverse effects of gravity and external acceleration on fluid distribution. This achieves stable and uniform distribution of the gas-liquid two-phase refrigerant under any orientation and vehicle acceleration conditions. Compared to traditional distributor heads, this method provides more uniform distribution, ensuring uniform mixing of the gas-liquid two-phase flow regardless of changes in external installation position and angle, or the application of gravity or external acceleration, greatly improving environmental adaptability and heat exchange efficiency.

[0030] The hybrid diversion device provided in this embodiment has strong structural scalability. The 1-to-16 diversion structure 20 can be expanded into 1-to-32 or other combinations. The four collection pipes 31 of the secondary diversion structure 30 can be combined into one, and can be expanded into eight or two or other combinations, depending on the specific outlet conditions.

[0031] Furthermore, the cross-sectional area of ​​the inlet pipe 10 should be slightly smaller than the sum of the cross-sectional areas of the sixteen branch pipes 21. This minimizes the flow resistance during liquid separation, and the branch inlets 211 are arranged evenly in a circumferential pattern. The gas-liquid two-phase refrigerant flows in through the inlet pipe 10, then passes through the sixteen branch pipes 21, and merges into the collector pipe 31 at the collector inlet 311, before flowing into the outlet pipe 40 from the collector pipe 31.

[0032] The specific rendezvous method is as follows, such as Figure 8 As shown: Convergence 1: 1+5+9+13 → Combination Pipeline 31④; Convergence 2: 2+6+10+14 → Combination Pipeline 31③; Convergence 3: 3+7+11+15 → Combination Pipeline 31②; Convergence 4: 4+8+12+16 → Combination Pipeline 31①.

[0033] Furthermore, the mixing and diversion device is a one-piece molded component, manufactured using a one-piece molding process. The interface between the inlet pipe 10 and the diversion pipe 21 is seamlessly integrated, resulting in a simple and clear assembly relationship. This eliminates numerous intermediate welding steps found in traditional structures, eliminating additional welding joints and fundamentally reducing the risk of media leakage. This significantly improves the product's structural strength and long-term operational reliability. In this embodiment, the overall mixing and diversion device is integrally molded using metal 3D printing, enabling a seamless and unsuspended structural design for the diversion pipe 21 and the collection pipe 31. The pipe inner walls are smooth and continuous, resulting in excellent fluid flow and minimal pressure loss. Simultaneously, the one-piece molding optimizes material distribution, avoids redundant structures, and significantly reduces overall material consumption, combining lightweight, high efficiency, and high reliability advantages.

[0034] Optionally, such as Figures 5 to 6 As shown, the secondary diversion structure 30 also includes a housing 32. Multiple manifolds 31 are located within the housing 32 and are evenly distributed circumferentially around the housing 32. Diversion pipes 21 are sandwiched between the inner wall of the housing 32 and the manifolds 31. At least two manifold inlets 311 are provided on the side of the manifolds 31 facing the diversion pipes 21, and the diversion pipes 21 are connected to the manifolds 31 through the manifold inlets 311. The manifolds 31 are arranged within the inner space of the diversion pipes 21, making full use of the internal area enclosed by the diversion pipes 21. The structural layout is compact and reasonable, requiring no additional external installation space. Through the nested internal and external structural design, the overall dimensions of the mixing and diversion device are effectively reduced, lowering the overall volume and space occupied. Simultaneously, the amount of material used is reduced, and the overall weight of the device is lightened, achieving a lightweight design and improving structural compactness and space utilization.

[0035] Furthermore, the axis of the manifold 31 is parallel to the axis of the housing 32, and multiple branch pipes 21 spirally surround the outer wall of the manifold 31. The multiple branch pipes 21 are arranged in a spiral pattern along the outer ring, forming a continuous and uniform outer circumferential flow channel structure. The manifold 31 used for secondary liquid separation adopts a straight column structure arranged in the inner ring, with the inner and outer flow channels coaxially nested and clearly layered. The branch pipes 21 and the manifold 31 smoothly connect and converge at a predetermined intersection point through the wall surface, making full use of radial and circumferential space to achieve a highly compact structural layout, maximizing space utilization. The overall pipe transition is continuous and smooth, without sharp corners, abrupt changes in cross-section, or local dead angles. The fluid flow path is gentle and smooth, effectively avoiding eddies, flow separation, and sudden increases in local resistance, significantly reducing overall flow resistance and improving the flow stability and distribution uniformity of the gas-liquid two-phase refrigerant.

[0036] Furthermore, at least two manifold inlets 311 are axially spaced along the manifold 31, effectively avoiding localized impacts, eddies, and flow segregation caused by refrigerant concentrating at the same cross-section. This allows the fluid in each branch pipe 21 to gradually and smoothly converge axially, reducing local pressure fluctuations. The refrigerant in multiple branch pipes 21 flows into the manifold 31 along the same circumference or in the same direction, avoiding mutual collisions, interference, and mixing of different flow directions, ensuring consistent flow direction. The axially spaced arrangement also balances the timing and pressure distribution of each manifold inlet 311, further reducing uneven distribution caused by gravity, acceleration, and flow channel differences, making fluid convergence more stable and orderly, significantly reducing mutual interference in the discharge direction, and improving overall flow stability and liquid distribution uniformity.

[0037] Furthermore, the number of manifold inlets 311 and branch pipes 21 are equal and correspond one-to-one. The number of branch pipes 21 is an integer multiple of the number of manifold inlets 31, so that each manifold inlet 31 corresponds to the exact same number of branch pipes 21. This ensures that the total refrigerant flow into each manifold inlet 31 is basically consistent from the source of distribution, effectively avoiding flow deviation in branch pipes 21. Flow balance provides a basis for full mixing of gas and liquid phases, further ensuring uniform refrigerant phase and flow distribution, and improving overall distribution stability.

[0038] Furthermore, the outlet pipe 40 passes through the housing 32 and connects to the manifold 31, adopting an internal arrangement structure. This fully utilizes the internal space of the housing 32, reduces the number of external pipes and joints, lowers the risk of leakage, and improves structural compactness and overall strength. The number of outlet pipes 40 does not exceed the number of manifolds 31, ensuring that each outlet pipe 40 corresponds to one or more manifolds 31, avoiding excessive outlets that could cause flow dispersion, uneven pressure, and disordered distribution. This design can stably output a uniformly mixed gas-liquid two-phase refrigerant, simplify the structure, reduce flow resistance, ensure stable fluid output and balanced pressure, and further improve the reliability and liquid separation effect of the device.

[0039] Optionally, such as Figures 1 to 2 As shown, the mixing and distribution device is a cylindrical structure. The inlet pipe 10 is located at the end of the cylindrical structure, and the axis of the inlet pipe 10 coincides with the axis of the cylindrical structure. This allows the gas-liquid two-phase refrigerant to enter the mixing and distribution device symmetrically from the center, effectively avoiding lateral flow deviation, gravity offset, and uneven flow caused by eccentric inflow. This enables the fluid to diffuse evenly along the circumferential direction, further improving the uniformity of refrigerant distribution in the inlet pipe 10 to each distribution pipe 21, and ensuring that each distribution pipe 21 obtains a stable and consistent flow rate and phase state.

[0040] Furthermore, the outlet pipe 40 is located at the other end of the cylindrical structure. The outlet pipe 40 and the inlet pipe 10 are respectively arranged at opposite ends of the cylindrical structure, forming a through-flow axial path. This ensures that the gas-liquid two-phase refrigerant has a complete and stable flow path, guaranteeing that the fluid is fully mixed and evenly distributed within the device before flowing smoothly out through the outlet pipe 40. This layout effectively avoids the fluid from flowing directly from the inlet pipe 10 to the outlet pipe 40 over a short distance, preventing flow short-circuiting and eliminating problems of insufficient mixing and uneven distribution caused by short circuits, thus improving the flow distribution effect and operational stability.

[0041] Another objective of this invention is to provide a heat exchanger assembly that eliminates the adverse effects of gravity and multi-directional acceleration on fluid distribution through a built-in mixing and diversion device, thereby achieving sufficient disturbance mixing and homogeneous distribution of the gas-liquid two-phase refrigerant and ensuring uniform and consistent medium distribution in each flow channel of the heat exchanger.

[0042] Specifically, a heat exchanger assembly includes a heat exchanger and the aforementioned mixing and distribution device. The manifold 31 is connected to the heat exchanger inlet via the outlet pipe 40. The mixing and distribution device provided in this embodiment, through a two-stage distribution structure combining internal primary and secondary distribution, effectively eliminates the adverse effects of gravity, multi-dimensional vehicle acceleration, and changes in installation posture on the distribution of the gas-liquid two-phase refrigerant. The refrigerant undergoes sufficient disturbance, shearing, and homogenization mixing within the device, resulting in a more uniform phase distribution. It is then distributed step-by-step to each branch via a precisely symmetrical flow channel structure. This structure ensures a high degree of consistency in the flow rate, gas-liquid ratio, and flow state of the medium entering each channel of the heat exchanger. It significantly improves problems such as flow deviation, unevenness, and localized overheating that are prone to occur in traditional liquid distribution structures. This greatly enhances the heat exchanger's adaptability under complex operating conditions, varying postures, and varying accelerations, effectively improving heat exchange uniformity and overall heat exchange efficiency. Simultaneously, it reduces flow resistance and leakage risk, enhancing the long-term stability and reliability of the system.

[0043] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the implementation of the present invention. Those skilled in the art will be able to make various obvious changes, readjustments, and substitutions without departing from the scope of protection of the present invention. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the scope of protection of the claims of the present invention.

Claims

1. A mixing and diverting device, characterized in that, include: An inlet pipe (10) is used to receive refrigerant; A primary diversion structure (20) includes multiple diversion pipes (21), one end of the inlet pipe (10) is connected to the multiple diversion pipes (21) respectively, the cross-section of the diversion inlet (211) of each diversion pipe (21) is equal, and the multiple diversion inlets (211) are evenly distributed along the circumference of the inlet pipe (10); The secondary diversion structure (30) includes at least two collection pipes (31), and at least two equally spaced diversion pipes (21) are connected to the same collection pipe (31); The outlet pipe (40) is connected to the inlet of the outlet pipe (40) via the collection outlet (312) of the collection pipe (31).

2. The mixing and diverting device according to claim 1, characterized in that, The secondary diversion structure (30) also includes a housing (32), a plurality of the collecting pipes (31) are located inside the housing (32), and the plurality of collecting pipes (31) are evenly distributed along the circumferential spacing of the housing (32). The diversion pipe (21) is sandwiched between the inner wall of the housing (32) and the collecting pipe (31). The collecting pipe (31) has at least two collecting inlets (311) on the side facing the diversion pipe (21), and the diversion pipe (21) is connected to the collecting pipe (31) through the collecting inlets (311).

3. The mixing and diverting device according to claim 2, characterized in that, The axial direction of the manifold (31) is parallel to the axial direction of the housing (32), and a plurality of the branch pipes (21) are spirally wrapped around the outer wall of the manifold (31).

4. The mixing and diverting device according to claim 3, characterized in that, At least two of the collection inlets (311) are spaced apart along the axial direction of the collection pipe (31).

5. The mixing and diverting device according to claim 4, characterized in that, The number of the collection inlets (311) and the number of the branch pipes (21) are equal and correspond one-to-one, and the number of the branch pipes (21) is an integer multiple of the number of the collection pipes (31).

6. The mixing and diverting device according to claim 2, characterized in that, The outlet pipe (40) passes through the housing (32) and communicates with the collection pipe (31). The number of outlet pipes (40) is not greater than the number of collection pipes (31).

7. The mixing and diverting device according to claim 1, characterized in that, The mixing and diversion device is a cylindrical structure, the inlet pipe (10) is located at the end of the cylindrical structure, and the axis of the inlet pipe (10) coincides with the axis of the cylindrical structure.

8. The mixing and diverting device according to claim 7, characterized in that, The outlet pipe (40) is located at the other end of the cylindrical structure.

9. The mixing and splitting device according to any one of claims 1-8, characterized in that, The mixing and diversion device is a one-piece molded part.

10. A heat exchanger assembly, characterized in that, Includes a heat exchanger and a mixing and diverting device as described in any one of claims 1-9, wherein the manifold (31) is connected to the inlet of the heat exchanger via the outlet pipe (40).

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