A curved heat exchanger based on additive manufacturing

Abstract

The application relates to a curved surface heat exchanger based on additive manufacturing, which comprises a heat exchange channel, a distributor and a collector, one end of the heat exchange channel is communicated with the distributor, and the other end of the heat exchange channel is communicated with the collector; the heat exchange channel comprises a plurality of single cell structures which are communicated in sequence, the single cell structure comprises an intermediate transition cavity, an inlet cavity and an outlet cavity, the inlet cavity and the outlet cavity are respectively arranged on the two sides of the intermediate transition cavity and are communicated with the intermediate transition cavity, a liquid inlet is arranged on the inlet cavity, a liquid outlet is arranged on the outlet cavity, and the directions of the liquid inlet and the liquid outlet are opposite; the liquid inlet of one single cell structure is communicated with the liquid outlet of an adjacent single cell structure, and the intermediate transition cavities of the adjacent two single cell structures are independently arranged; and the outer surface of the intermediate transition cavity of the single cell structure is a curved surface structure. The curved surface heat exchanger has the advantages of high heat exchange capacity, small volume, light weight, space saving for air conditioners, liquid cooling and electronic equipment, and integrated production and manufacturing by combining the process of additive manufacturing.

Description

Technical Field

[0001] This invention relates to the fields of additive manufacturing and electronic device structure technology, and in particular to a curved surface heat exchanger based on additive manufacturing. Background Technology

[0002] To address the heat dissipation challenges of highly integrated, high-power weaponry within limited space and weight constraints, research into efficient heat exchange technologies is essential. This reduces resource consumption in cooling systems, conserves resources for environmental control equipment, maximizes system efficiency, and can also be applied to heat dissipation in electronic devices. Efficient heat exchange technology is a widely used unit device in industries such as chemical, petroleum, pharmaceutical, energy, and electronic equipment heat dissipation. Traditional heat exchanger types include spiral baffle heat exchangers, tube-fin heat exchangers, plate heat exchangers, and parallel flow heat exchangers. Currently, the most commonly used heat exchanger types for air conditioning, liquid cooling equipment, and other electronic equipment are tube-fin and parallel flow heat exchangers. However, with the development of additive manufacturing, computational fluid dynamics, and complex structure topology optimization technologies, structural optimization and lightweight design technologies based on complex surfaces have gradually emerged. Simultaneously, research on heat exchange technologies utilizing the high area ratio of complex surfaces has become a hot topic and is gradually becoming one of the important technical approaches to achieving efficient heat exchanger design. Furthermore, existing heat exchangers are large and heavy, failing to meet the current heat dissipation requirements of efficient heat exchangers. Summary of the Invention

[0003] In order to solve one or more technical problems existing in the prior art, the present invention provides a curved surface heat exchanger based on additive manufacturing.

[0004] The technical solution of the present invention to solve the above-mentioned technical problems is as follows: a curved surface heat exchanger based on additive manufacturing, comprising a heat exchange channel, a liquid distributor and a liquid collector, wherein one end of the heat exchange channel is connected to the liquid distributor and the other end of the heat exchange channel is connected to the liquid collector;

[0005] The heat exchange channel includes multiple sequentially connected unit cell structures. Each unit cell structure includes an intermediate transition cavity, an inlet cavity, and an outlet cavity. The inlet cavity and the outlet cavity are respectively located on both sides of the intermediate transition cavity and are both connected to the intermediate transition cavity. The inlet cavity has a liquid inlet, and the outlet cavity has a liquid outlet. The inlet cavity and the outlet cavity face opposite directions. The liquid inlet of one unit cell structure is connected to the liquid outlet of the adjacent unit cell structure. The intermediate transition cavities of two adjacent unit cell structures are independently set. The outer surface of the intermediate transition cavity of the unit cell structure is a curved surface structure.

[0006] The beneficial effects of this invention are as follows: This invention, based on additive manufacturing of curved surface heat exchangers, not only achieves the required heat exchange performance but also imposes strict requirements on its size and weight, while simultaneously ensuring the pressure resistance of the heat exchanger itself. This invention, based on additive manufacturing of complex curved surface high-efficiency heat exchangers, maintains the same heat exchange capacity while reducing weight by more than 30% and spatial dimensions by 15% compared to traditional heat exchangers, while meeting the system pressure requirement of 4.0 MPa. The high-efficiency heat exchanger has a higher surface area ratio, better thermal performance, load-bearing capacity, and compactness. This heat exchanger features high heat exchange capacity, small size, and light weight, saving space in the design of air conditioning, liquid cooling, and electronic equipment. Furthermore, combined with additive manufacturing processes, it achieves integrated production, and the pressure resistance and structural strength also meet design requirements. It is particularly suitable for the miniaturization design of air conditioning, liquid cooling equipment, and electronic equipment, effectively solving the miniaturization problem of various environmental control and electronic equipment.

[0007] Based on the above technical solution, the present invention can be further improved as follows.

[0008] Furthermore, heat dissipation fins are provided on the outer surface of the intermediate transition cavity and / or the outer surface of the inlet cavity and / or the outer surface of the outlet cavity, and an air duct is formed between two adjacent heat dissipation fins. The air duct is arranged at an angle to the liquid inlet and outlet direction of the heat exchange channel.

[0009] The beneficial effects of adopting the above-mentioned further solution are: the arrangement of heat dissipation fins can form an air duct that is angled to the heat exchange channel, which can realize cross-counterflow heat exchange and achieve good heat exchange effect.

[0010] Furthermore, the air duct is arranged perpendicular to the liquid inlet and outlet directions of the heat exchange channel.

[0011] Furthermore, the heat dissipation fins are arranged at an angle toward the liquid inlet side of the unit cell structure.

[0012] The beneficial effect of adopting the above-mentioned further solution is that it makes the air duct closer to the outer surface of the heat exchange channel, resulting in better heat exchange effect.

[0013] Furthermore, the outer surface of the intermediate transition cavity is a three-period minimal surface.

[0014] The beneficial effects of adopting the above-mentioned further scheme are as follows: The three-period minimal surface is a surface with an average curvature of zero, and its gradual curvature characteristics give it good self-support and connectivity. Simultaneously, the complex surface features of the three-period minimal surface can effectively thin the thermal boundary layer when used as a heat flow structure, and the continuous changes in its internal geometry lead to changes in the internal fluid flow state, achieving fluid mixing. Combined with its inherent high specific surface area, this effectively improves the heat transfer capacity of the heat flow structure. Furthermore, the smooth and continuous outer contour of the three-period minimal surface results in lower flow resistance when the fluid flows through it, thus meeting the requirement of low air resistance in heat exchangers.

[0015] Furthermore, the configuration of the three-period minimal surface includes:

[0016] P-type: φ P =cos(X)+cos(Y)+cos(Z)=C;

[0017] Type G: φ G =sin(X)cos(Y)+sin(Z)cos(X)+sin(Y)cos(Z)=C;

[0018] Type D: φ D =cos(X)cos(Y)cos(Z)-sin(X)sin(Y)sin(Z)=C;

[0019] Type I: φ I-WP =2[cos(X)cos(Y)+cos(Y)cos(Z)+cos(Z)cos(X)]-[cos(2X)+cos(2Y)+cos(2Z)]=C;

[0020] Where C represents the curvature value of the three-period minimum surface, used to control the size of the pores inside the intermediate transition cavity; X = 2nπx, Y = 2nπy, Z = 2nπz in the P-type, G-type, D-type, and I-type equations, where n can be 1 / 2 or a positive integer; indicates the periodic adjustment parameters of the P-type, G-type, D-type, and I-type equations on the X, Y, and Z axes.

[0021] Furthermore, there are multiple inlet chambers and multiple outlet chambers, and the multiple inlet chambers and multiple outlet chambers are arranged in a one-to-one correspondence along the liquid inlet and outlet directions of the heat exchange channel.

[0022] Furthermore, there are four inlet chambers, which are respectively arranged at the four corners on one side of the intermediate transition cavity and arranged in a square; there are four outlet chambers, which are respectively arranged at the four corners on the other side of the intermediate transition cavity and arranged in a square.

[0023] Furthermore, the liquid separator is connected to an inlet pipe, and the liquid collector is connected to an outlet pipe.

[0024] Furthermore, the multiple sequentially connected unit cell structures of the heat exchange channel are formed using 3D printing. Attached Figure Description

[0025] Figure 1 This is a three-dimensional structural schematic diagram of the curved surface heat exchanger based on additive manufacturing according to the present invention;

[0026] Figure 2 This is a three-dimensional structural diagram of the heat exchange channel of the present invention;

[0027] Figure 3 This is a schematic diagram of the two unit cell structures arranged vertically in this invention;

[0028] Figure 4 This is a three-dimensional structural diagram of the unit cell structure of the present invention. Figure 1 ;

[0029] Figure 5 This is a three-dimensional structural diagram of the unit cell structure of the present invention. Figure 2 ;

[0030] Figure 6 This is a schematic diagram of the structure of the P-type three-period minimal surface of the present invention.

[0031] The attached diagram lists the components represented by each number as follows:

[0032] 1. Heat exchange channel; 11. Unit cell structure; 12. Intermediate transition cavity; 13. Inlet cavity; 14. Outlet cavity; 15. Liquid inlet; 16. Liquid outlet;

[0033] 2. Dispenser; 3. Collector; 4. Heat sink fins; 5. Inlet pipe; 6. Outlet pipe; 7. Mounting plate. Detailed Implementation

[0034] The principles and features of the present invention are described below with reference to the accompanying drawings. The examples given are only for explaining the present invention and are not intended to limit the scope of the present invention.

[0035] like Figures 1-6As shown, this embodiment of a curved heat exchanger based on additive manufacturing includes a heat exchange channel 1, a distributor 2, and a collector 3. One end of the heat exchange channel 1 is connected to the distributor 2, and the other end of the heat exchange channel 1 is connected to the collector 3. The heat exchange channel 1 includes a plurality of sequentially connected unit cell structures 11. Each unit cell structure 11 includes an intermediate transition cavity 12, an inlet cavity 13, and an outlet cavity 14. The inlet cavity 13 and the outlet cavity 14 are respectively located on both sides of the intermediate transition cavity 12 and are both connected to the intermediate transition cavity 12. An inlet port 15 is provided on the inlet cavity 13, and an outlet port 16 is provided on the outlet cavity 14. The inlet port 15 and the outlet port 16 face opposite directions. The inlet port 15 of one unit cell structure 11 is connected to the outlet port 16 of the adjacent unit cell structure 11, and the intermediate transition cavities 12 of two adjacent unit cell structures 11 are independently arranged. The outer surface of the intermediate transition cavity 12 of the unit cell structure 11 is a curved structure. Among them, multiple unit cell structures can be arranged and combined in different ways to form heat exchange channels with different structures and forms; the heat exchange channels are used in combination to form curved heat exchangers with different heat exchange capacities and different structural forms, so as to solve the heat dissipation needs of different air conditioners, liquid cooling equipment and electronic devices with different heat outputs.

[0036] like Figures 2-5 As shown, in this embodiment, heat dissipation fins 4 are provided on the outer surface of the intermediate transition cavity 12 and / or the outer surface of the inlet cavity 13 and / or the outer surface of the outlet cavity 14. An air duct is formed between two adjacent heat dissipation fins 4, and the air duct is arranged at an angle to the liquid inlet and outlet direction of the heat exchange channel 1. The arrangement of the heat dissipation fins can form an air duct arranged at an angle to the heat exchange channel, which can realize cross-counterflow heat exchange and achieve good heat exchange effect.

[0037] like Figures 2-5 As shown, in this embodiment, the air duct is arranged perpendicular to the liquid inlet and outlet direction of the heat exchange channel 1.

[0038] like Figures 2-5 As shown, in this embodiment, the heat dissipation fins 4 are arranged at an angle toward the liquid inlet 15 of the unit cell structure 11, with the angle of inclination being 5° to 85° relative to the liquid inlet / outlet direction, preferably 15° to 60°. This makes the air duct closer to the outer surface of the heat exchange channel, resulting in better heat exchange performance.

[0039] When additively manufacturing curved heat exchangers, overhanging structures can occur, leading to 3D printing failures. Many factors affect the forming quality of self-supporting overhanging structures, including the tilt angle of the overhanging surface, the overhang length, laser input energy, residual stress, and the structure's own configuration. The most common optimization method is to add support structures or adjust the forming direction and process parameters to minimize deformation. However, since the support structure is connected to the part, removing it can cause uncontrollable damage to the part's surface. Adding supports not only wastes material but also increases post-processing time and difficulty. Therefore, this embodiment optimizes the support structure within the heat exchanger's unit cell during its structural design, employing a combination of an intermediate transition cavity, inlet cavity, and outlet cavity to achieve 3D printing of the heat exchanger while minimizing impact on its performance. Simultaneously, the design of the heat dissipation fins also considers additive manufacturing processes, ensuring a fin thickness greater than 2mm and controlling the fin tilt angle to meet 3D printing requirements, enabling the printing of complex curved 3D objects.

[0040] like Figures 2-5 As shown, the outer surface of the intermediate transition cavity 12 in this embodiment is a three-period minimal surface. A three-period minimal surface is a surface with an average curvature of zero, and its gradual curvature characteristics give it good self-support and connectivity. Simultaneously, the complex surface features of the minimal surface can effectively thin the thermal boundary layer in applications as a heat flow structure, and the continuous changes in its internal geometry lead to changes in the internal fluid flow state, achieving fluid mixing. Combined with its inherent high specific surface area, this effectively improves the heat transfer capacity of the heat flow structure. Furthermore, the outer contour of the minimal surface has smooth and continuous surface features, resulting in lower flow resistance when the fluid flows through it, thus meeting the requirement of low air resistance in the heat exchanger.

[0041] The configurations of the three-period minimal surface include:

[0042] P-type: φ P =cos(X)+cos(Y)+cos(Z)=C;

[0043] Type G: φ G =sin(X)cos(Y)+sin(Z)cos(X)+sin(Y)cos(Z)=C;

[0044] Type D: φ D =cos(X)cos(Y)cos(Z)-sin(X)sin(Y)sin(Z)=C;

[0045] Type I: φ I-WP=2[cos(X)cos(Y)+cos(Y)cos(Z)+cos(Z)cos(X)]-[cos(2X)+cos(2Y)+cos(2Z)]=C;

[0046] Where C represents the curvature value of the three-period minimum surface, used to control the size of the pores inside the intermediate transition cavity; in the P-type, G-type, D-type, and I-type equations, X = 2nπx, Y = 2nπy, Z = 2nπz, where n can be 1 / 2 or a positive integer. When n is 1 / 2, the period is 1 / 2; when n is 1, the period is 1, and so on. The period of the above equations on the X, Y, and Z axes is n; indicating the period adjustment parameters of the P-type, G-type, D-type, and I-type equations on the X, Y, and Z axes. In this embodiment, the curvature value and period are adjusted to adjust the basic shape of the three-period surface. Combined with the flow channel direction, the pores of the periodic surface are filled and the structure is adjusted, and an integrated fin structure is added to form a three-period heat exchanger unit cell structure.

[0047] This embodiment of the curved heat exchanger employs a three-cycle minimal curved surface design to achieve a higher specific surface area and save space required for heat exchange. Good connectivity and surface curvature result in lower system flow resistance for the complex and efficient curved heat exchanger. Through integrated heat dissipation fins, it achieves a weight reduction of over 30% and a size reduction of 15% compared to traditional heat exchangers, while increasing heat exchange capacity. Simultaneously, through integrated structural design and additive manufacturing processes, the addition of internal support structures within the three-cycle flow channels enhances system pressure resistance, meeting the system pressure requirement of 4.0 MPa. The unsupported printed structure design of the heat dissipation fins enables the design and additive manufacturing of the complex curved heat exchanger. This curved heat exchanger boasts high heat exchange capacity, small size, and light weight, saving space in the design of air conditioning, liquid cooling, and electronic equipment. Combined with additive manufacturing processes, it achieves integrated production, and its pressure resistance and structural strength also meet design requirements. It is particularly suitable for the miniaturization design of air conditioning, liquid cooling equipment, and electronic equipment, effectively solving the miniaturization problem of various environmental control and electronic equipment.

[0048] like Figures 2-5 As shown, in this embodiment, there are multiple inlet chambers 13 and multiple outlet chambers 14, and the multiple inlet chambers 13 and multiple outlet chambers 14 are arranged in a one-to-one correspondence along the liquid inlet and outlet directions of the heat exchange channel 1.

[0049] Preferably, there are four inlet chambers 13, which are respectively arranged at the four corners on one side of the intermediate transition cavity 12 and arranged in a square; there are four outlet chambers 14, which are respectively arranged at the four corners on the other side of the intermediate transition cavity 12 and arranged in a square.

[0050] like Figure 1As shown, in this embodiment, the liquid separator 2 is connected to an inlet pipe 5, the liquid collector 3 is connected to an outlet pipe 6, and the liquid separator 2 and the liquid collector 3 are respectively provided with mounting plates 7.

[0051] In a preferred embodiment, the multiple sequentially connected unit cell structures 11 of the heat exchange channel 1 are formed by 3D printing.

[0052] Among them, such as Figure 1 As shown, this embodiment designs the structural layout of the inlet pipe, distributor, collector, outlet pipe, and mounting plate based on the size and structural arrangement of the heat exchanger. Simultaneously, based on the heat exchanger's airflow, liquid supply, and heat exchange capacity, the number and structural dimensions of the heat exchanger's heat exchange channels are adjusted according to requirements to meet the design specifications for heat exchange capacity, structural dimensions, and weight. Different combinations of fans (external circulation airflow) and curved surface heat exchangers can be used to match different heat exchange capacities, solving the heat dissipation problems of different air conditioners, liquid cooling equipment, and electronic devices with different heat outputs.

[0053] The heat exchange channel in this embodiment is composed of a number of complex three-period minimal curved surface heat exchanger unit cell structures. The external circulation airflow direction is in a counter-current direction to the liquid flow direction of the heat exchanger, achieving the maximum heat exchange effect of the complex three-period minimal curved surface heat exchanger unit cell structure. Based on the dimensions, structural layout, and airflow parameters of the heat exchange channel, the parameters of the complex three-period minimal curved surface heat exchanger unit cell structure are designed. Further heat exchange simulation calculations are performed on the unit cell structure to ensure its heat exchange capacity meets the design requirements. Finally, by adjusting the unit cell structure dimensions and integrated fin parameters, the heat exchange channel's heat exchange performance is further improved.

[0054] This embodiment is based on an additively manufactured curved surface heat exchanger. During the design process, the design of the complex curved surface heat exchanger is guided by indicators such as heat transfer and flow resistance, combined with the heat exchanger structural layout. For example, the first step involves constructing an additively manufactured geometric model based on the dimensions of the heat exchanger geometric model and the three-period minimum surface modeling parameters. This model includes the additively manufactured self-supporting structure design of the heat exchanger's unit cell structure. The second step involves conducting thermal and mechanical simulations of the heat exchanger's performance based on the curved surface heat exchanger model. The third step involves comparing the simulation results with the heat exchanger's indicators. If the design indicators are met, the design process is complete; otherwise, the process returns to the construction of the heat exchanger geometric model for iterative optimization of the curved surface heat exchanger design.

[0055] This embodiment utilizes an additively manufactured curved heat exchanger installed inside liquid cooling equipment, air conditioning equipment, or electronic equipment. During operation, the heat exchanger is equipped with an air supply system (typically a fan) and simultaneously supplies the heat exchanger with low-temperature refrigerant or coolant to achieve its heat exchange function. The curved heat exchanger can save internal space in electronic equipment, air conditioning systems, and liquid cooling systems, or increase the heat exchange capacity of these systems and reduce the internal temperature of electronic equipment.

[0056] This embodiment utilizes an additively manufactured curved surface heat exchanger. Besides achieving the required heat exchange performance, it also imposes strict requirements on its size and weight, while simultaneously ensuring the pressure resistance of the heat exchanger itself. This invention, based on a complex curved surface high-efficiency heat exchanger manufactured using additive manufacturing, maintains the same heat exchange capacity while reducing weight by more than 30% and spatial dimensions by 15% compared to traditional heat exchangers. It also meets the system pressure requirement of 4.0 MPa. The high-efficiency heat exchanger has a higher surface area ratio, better thermal performance, load-bearing capacity, and compactness. This heat exchanger features high heat exchange capacity, small size, and light weight, saving space in the design of air conditioning, liquid cooling, and electronic equipment. Furthermore, combined with additive manufacturing processes, it achieves integrated production, and its pressure resistance and structural strength also meet design requirements. It is particularly suitable for the miniaturization design of air conditioning, liquid cooling equipment, and electronic equipment, effectively solving the miniaturization problem of various environmental control and electronic equipment.

[0057] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, 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 this invention.

[0058] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0059] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., 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, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0060] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0061] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0062] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A curved surface heat exchanger based on additive manufacturing, characterized in that, It includes a heat exchange channel, a liquid distributor, and a liquid collector, wherein one end of the heat exchange channel is connected to the liquid distributor, and the other end of the heat exchange channel is connected to the liquid collector; The heat exchange channel includes multiple sequentially connected unit cell structures. Each unit cell structure includes an intermediate transition cavity, an inlet cavity, and an outlet cavity. The inlet cavity and outlet cavity are respectively located on both sides of the intermediate transition cavity and are both connected to the intermediate transition cavity. The inlet cavity has a liquid inlet, and the outlet cavity has a liquid outlet. The inlet cavity and outlet cavity face opposite directions. The liquid inlet of one unit cell structure is connected to the liquid outlet of the adjacent unit cell structure. The intermediate transition cavities of two adjacent unit cell structures are independently arranged. The outer surface of the intermediate transition cavity of the unit cell structure is a curved surface structure. There are multiple inlet cavities and multiple outlet cavities, and the multiple inlet cavities and multiple outlet cavities are arranged in a one-to-one correspondence along the liquid inlet and outlet directions of the heat exchange channel. Heat dissipation fins are provided on the outer surface of the intermediate transition cavity and / or the outer surface of the inlet cavity and / or the outer surface of the outlet cavity. An air duct is formed between two adjacent heat dissipation fins. The air duct is arranged at an angle to the liquid inlet and outlet direction of the heat exchange channel. The outer surface of the intermediate transition cavity is a three-period minimal surface; the configuration of the three-period minimal surface includes: P-type: ; Type G: ; Type D: ; Type I: ; Where C represents the curvature value of the three-period minimum surface, used to control the size of the pores inside the intermediate transition cavity; X=2nπx, Y=2nπy, Z=2nπz in the P-type, G-type, D-type, and I-type equations, where n can be 1 / 2 or a positive integer; indicates the periodic adjustment parameters of the P-type, G-type, D-type, and I-type equations on the X, Y, and Z axes.

2. The curved surface heat exchanger based on additive manufacturing according to claim 1, characterized in that, The air duct is arranged perpendicular to the liquid inlet and outlet direction of the heat exchange channel.

3. The curved surface heat exchanger based on additive manufacturing according to claim 1, characterized in that, The heat dissipation fins are arranged at an angle toward the liquid inlet side of the unit cell structure.

4. The curved surface heat exchanger based on additive manufacturing according to claim 1, characterized in that, There are four inlet chambers, which are respectively arranged at the four corners on one side of the intermediate transition cavity and arranged in a square; there are four outlet chambers, which are respectively arranged at the four corners on the other side of the intermediate transition cavity and arranged in a square.

5. A curved surface heat exchanger based on additive manufacturing according to claim 1, characterized in that, The separator is connected to an inlet pipe, and the collector is connected to an outlet pipe.

6. The curved surface heat exchanger based on additive manufacturing according to claim 1, characterized in that, The heat exchange channels are formed by 3D printing of multiple sequentially connected unit cell structures.

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