Radiator and method for determining structural parameters of radiator

Abstract

The invention relates to the field of radiators, particularly provides a radiator and a method for determining structural parameters of the radiator, and aims to solve the problem that the structural parameters of a fin type radiator with the lowest height cannot be quickly matched according to the requirements of different cooling systems in the prior art. The radiator comprises a radiating body, the radiating body is provided with a plurality of fins which are sequentially connected in the first direction, the fins extend in the second direction according to a sinusoidal waveform, and the cross section of the waveform of each fin is trapezoidal; the lower width of the fins on the cross section is larger than or equal to 1.5 times of the upper width of the fins on the cross section and smaller than or equal to 2 times of the upper width. According to the method, the proportion of the upper width and the lower width of the cross section of the fin is limited, under the proportion, the radiator structure parameters which can meet the requirements of different cooling systems and have the lowest fin height can be rapidly found out, the fin and the parameter determination method can adapt to different cooling systems so as to achieve platformization of the radiator, and the cost is reduced. And the manufacturing cost of the fins is reduced.

Description

Technical Field

[0001] The present invention relates to the field of radiators, and specifically provides a radiator and a method for determining structural parameters of the radiator. Background Art

[0002] At present, there are many types of radiators in the cooling system, among which fin-type cooling channels have begun to be widely used in cooling systems. Different cooling systems have different requirements for cooling capacity. The main technical parameter indicators required for fluid cooling systems are usually thermal resistance and flow resistance. Thermal resistance is a characterization of the cooling capacity of the cooling system; flow resistance is a characterization of the coolant flow capacity of the cooling system, which is often a requirement of the entire vehicle system. There is often an opposing relationship between thermal resistance and flow resistance. Often, the flow resistance is large and the thermal resistance is small, or the flow resistance is small and the thermal resistance is large.

[0003] The fin-type heat sinks currently used have various shapes and sizes of fins to solve their own thermal resistance and flow resistance problems. However, there is often no unified method to describe the relationship between the two characterizing thermal resistance and flow resistance of the cooling system, which leads to different fin shapes, inability to miniaturize, poor platformization, and difficulty in iteration. It is impossible to quickly match different fin-type heat sink parameters according to the requirements of different cooling systems, and redundant designs appear to meet the single indicators of thermal resistance or flow resistance.

[0004] In addition, in order to save costs, the size of the fins of the heat sink needs to be made as small as possible to meet the requirements of economy and miniaturization while meeting the requirements of thermal resistance and flow resistance. At the same time, the height of the fins will limit their production process. For example, extrusion parts can produce fins with very high heights, but stamping parts can only produce fins with smaller heights. In order to make the fins adapt to more molding processes, the size of the fins also needs to be made smaller. For example, if the height of the fins is small, it can be manufactured by both extrusion and stamping processes.

[0005] Accordingly, the art needs a new technical solution to solve the above problems. Summary of the invention

[0006] The present invention aims to solve the above technical problem, that is, to solve the problem that the prior art cannot quickly match the structural parameters of the fin-type heat sink with the lowest height according to the requirements of different cooling systems. To this end, the present invention provides a heat sink, including a heat dissipation body, the heat dissipation body having a plurality of fins connected in sequence along a first direction, the fins extending in a second direction according to a sinusoidal waveform y=A sin(2πx / B), the cross section of the fin waveform is a trapezoid; the lower width of the fin at the cross section is greater than or equal to 1.5 times the upper width of the fin at the cross section, and less than or equal to 2 times the upper width of the fin at the cross section.

[0007] In the above specific embodiment with a radiator, the radiator further comprises: a cover plate and a bottom plate, the cover plate is arranged on the bottom plate and forms a water channel cavity between the cover plate and the bottom plate, the heat dissipation body is arranged in the water channel cavity; the water channel cavity is used to accommodate the cooling medium.

[0008] In the above specific implementation with the heat sink, the heat sink body, the cover plate and the bottom plate are connected by welding.

[0009] In the above specific implementation of the heat sink, the height of the fins ranges from 4±0.1 mm.

[0010] In the above specific embodiment with the heat sink, the upper width of the fin is 1.8 mm, the lower width of the fin is 3.4 mm, the height of the fin is 4 mm, the amplitude of the fin is 0.5 mm, and the period of the fin is 9 mm.

[0011] A method for determining structural parameters of a radiator, the radiator being the above-mentioned radiator, the method for determining structural parameters of the radiator comprising: determining target parameters that affect the heat dissipation performance of the radiator, the target parameters comprising at least one of fin amplitude, fin period, fin upper width, and fin lower width; determining a first data range of the target parameters; based on a situation where the fin height is a preset height value, taking different values ​​of the target parameter within the first data range to conduct actual tests, and determining a second data range that satisfies the heat dissipation performance, the second data range being smaller than the first data range; within the second data range, taking different values ​​of the target parameter to conduct actual tests, and determining a first data set of the target parameter, the first data set being a data set when the heat dissipation performance of the radiator is optimal in the test results; based on the first data set of the target parameters, determining through actual tests a minimum height value of the fin height on the premise of satisfying the heat dissipation performance.

[0012] In a specific implementation of the above-mentioned method for determining the structural parameters of the radiator, the target parameters include the upper width of the fin and the lower width of the fin; the method also includes: based on the case where the fin height is the minimum value, taking different values ​​of the target parameter within the second data range to conduct actual tests to determine a second data set of the target parameter, the second data set being the data set with the largest upper width of the fin and the lower width of the fin under the premise of meeting the heat dissipation performance of the radiator in the test results.

[0013] In the above-mentioned specific implementation method of the method for determining the structural parameters of the radiator, the structural parameters of the radiator also include: the width of the heat dissipation body in the first direction and the length of the heat dissipation body in the second direction; "determining the first data range of the target parameter" also includes: determining the width and length of the heat dissipation body; determining the first data range of the target parameter based on the width and length.

[0014] In the specific implementation of the method for determining the structural parameters of the heat sink, "determining the width and length of the heat sink body" specifically includes: determining the width and length of the heat sink body according to the size of the heat dissipation area.

[0015] In the above-mentioned specific implementation method of the method for determining the structural parameters of the heat sink, "determining the first data range of the target parameters according to the width and length" is specifically: the length is a multiple of the period of the fin, and the preliminary value range of the period is determined according to the length; the width is a multiple of the sum of the amplitude and the upper width, and the preliminary value range of the amplitude and the upper width is determined according to the width; the width is an integer multiple of the lower width, and the preliminary value range of the lower width is determined according to the width.

[0016] Under the condition of adopting the above technical scheme, the present invention has made improvements from two perspectives, namely, the structure and the method for determining the structural parameters. The structure of the radiator fin is made into a shape extending along the sine wave. The various parameters in the sinusoidal fin are interrelated, which is convenient for DOE (Design of Experiments) experiments, and the fin-type radiator cooling system formed by the sinusoidal fin can use a unified method to describe the relationship between thermal resistance and flow resistance; according to the relationship between the structural parameters of the radiator fin, a corresponding parameter determination method is provided, which can quickly iterate the fin parameters that can meet different heat dissipation requirements, accelerate the design iteration speed, reduce the iteration cost, and facilitate the platform design of the fin-type radiator; and the ratio of the upper width to the lower width at the fin cross section is limited. Under this ratio, the minimum height H of the fin can be obtained, so that the fin can be minimized on the basis of meeting the cooling requirements. The smaller the height of the fin, the lower the production cost, and the volume of the radiator will also be reduced accordingly, so as to realize the miniaturization of the radiator, and achieve the purpose of saving manufacturing costs, adapting to a variety of manufacturing methods, occupying a smaller installation space and facilitating placement. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The preferred embodiments of the present invention are described below in conjunction with the accompanying drawings, in which:

[0018] Figure 1 is a top view of the heat dissipation body in the present invention;

[0019] Figure 2 It is a side view of the heat dissipation body at a certain cross section in the present invention;

[0020] Figure 3 is a schematic structural diagram of a fin cross section in the present invention;

[0021] Figure 4 is an exploded view of the radiator of the present invention;

[0022] Figure 5 It is a flow chart of the steps of the method for determining the structural parameters of the radiator in the present invention.

[0023] In the figure: 1, fin, 2, cover plate, 3, bottom plate. DETAILED DESCRIPTION

[0024] The preferred embodiments of the present invention are described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are only used to explain the technical principles of the present invention and are not used to limit the scope of protection of the present invention. Those skilled in the art can make adjustments to them as needed to adapt to specific application scenarios.

[0025] It should be noted that in the description of the present invention, the terms "upper", "lower", "left", "right", "inner", "outer", etc. indicating directions or positional relationships are based on the directions or positional relationships shown in the drawings, which are only for the convenience of description, and do not indicate or imply that the relevant devices or elements must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, ordinal numbers such as "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0026] In addition, it should be noted that in the description of the present invention, unless otherwise clearly specified and limited, the terms "installation" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0027] Furthermore, in order to more clearly demonstrate the core technical solution of the present invention, the description of certain well-known structures in the radiator is omitted in the following description. However, such omission is only for the convenience of description and does not mean that the radiator may be without these structures.

[0028] like Figure 1-5As shown, the present invention proposes a method for determining the structural parameters of a heat sink, wherein the heat sink includes a heat sink body, the heat sink body has a plurality of fins 1 connected in sequence along a first direction, the fins 1 extend in a second direction according to a sinusoidal waveform y=A sin(2πx / B), and the cross section of the waveform of the fins 1 is a trapezoid; the structural parameters of the heat sink include: the amplitude A of the fins 1, the period B of the fins 1, the upper width a, the lower width b and the height H of the fins 1. The various parameters included in the heat sink have different effects on the thermal resistance and the flow resistance, for example: the larger the A, the larger the flow resistance of the cooling system and the smaller the thermal resistance; the larger the B, the smaller the flow resistance of the cooling system and the larger the thermal resistance; when the structural parameters of the heat sink also include the width W of the heat sink body in the first direction and the length L of the heat sink body in the second direction, when W is a constant value, the smaller a and b, the larger the flow resistance of the cooling system and the smaller the thermal resistance; the larger H, the smaller the flow resistance of the cooling system and the smaller the thermal resistance, but when H is large to a certain extent, the influence on the flow resistance and the thermal resistance will be flat. Therefore, it is necessary to find a unified method to adjust the values ​​of various parameters in the radiator so that the performance of the radiator can be minimized while meeting the cooling requirements of the system, thereby reducing the manufacturing cost of the fins, improving the adaptability of the fins to different production processes, and enabling the fin-type radiator to be platform-based.

[0029] In this embodiment, the method includes: determining a target parameter that affects the heat dissipation performance of the heat sink, the target parameter including at least one of fin amplitude A, fin period B, fin upper width a, and fin lower width b. In this embodiment, the target parameters include fin amplitude A, fin period B, fin upper width a, and fin lower width b as an example for description, but those skilled in the art can select which parameters to include in the target parameters according to actual needs, for example, period B is a fixed value, and amplitude A, fin upper width a, and fin lower width b are selected for subsequent actual experiments.

[0030] Determine the first data range of the target parameter; the first data range is only an approximate range, estimated based on the size of the heat dissipation area, and aims to provide a reasonable data range for subsequent actual experiments; the first data range can be larger to ensure that important target parameter combinations are not missed in subsequent iterations, and at the same time, it can also limit the value range of parameter iteration to improve iteration efficiency.

[0031] In order to narrow the numerical range of the target parameter, based on the situation where the fin height is a preset height value, different numerical values ​​of the target parameter are taken within the first data range for actual testing (which can be actual testing or numerical simulation) to determine a second data range that meets the heat dissipation performance, and the second data range is smaller than the first data range. When the thermal resistance of the radiator is less than or equal to the thermal resistance required by the cooling system, and the flow resistance of the radiator is less than or equal to the flow resistance required by the cooling system, the radiator is said to be able to "meet the heat dissipation performance." For example, the heat dissipation requirements of a cooling system are: the thermal resistance is 0.14℃ / W, and at a temperature of 25℃, the flow resistance needs to reach 12Kpa. When the thermal resistance of the radiator is less than or equal to 0.14℃ / W, and the flow resistance of the radiator is around 12Kpa (or within an acceptable range), the radiator is said to be able to meet the heat dissipation performance of the cooling system.

[0032] In the process of this step, the value of the target parameter is continuously adjusted, and simulation data is collected. The influence of different parameter changes on the heat dissipation performance is analyzed according to the degree of increase or decrease of thermal resistance and flow resistance. If the value of the parameter changes, the change of thermal resistance and flow resistance is large, then the value change range has a great influence on the heat dissipation performance; if the value of the parameter changes, the change of thermal resistance and flow resistance is small or almost unchanged, then the value change range has a small influence on the heat dissipation performance. In the first data range, some value ranges have a great influence on the heat dissipation performance (i.e., sensitive direction), and some value ranges have a small influence on the heat dissipation performance. According to the magnitude of the influence on the heat dissipation performance, the first data range of the target parameter is first narrowed to the value range that has a great influence on the heat dissipation performance (i.e., the first data range of the target parameter is narrowed to the sensitive direction); then, the value range that can meet the heat dissipation requirements is found from the narrowed value range as the second data range, and the second data range finally obtained is the value range that has a great influence on the heat dissipation performance and can meet the heat dissipation performance requirements. Through these two steps, the range of parameter values ​​is gradually narrowed. This process can involve the adjustment of a single parameter (such as adjusting B first), or it can involve the joint adjustment of multiple parameters (such as adjusting B and A at the same time). By exploring the sensitive direction of the parameters to thermal resistance and flow resistance, the range of the parameters can be quickly narrowed down. This step provides a more accurate range of the target parameters for subsequent steps, namely the second data range, making subsequent actual experiments more efficient.

[0033] For example, the first data range of the period B of fin 1 is 5-20mm. Through a series of experiments, it is found that when B increases from 5mm to 10mm, the flow resistance and thermal resistance change significantly, indicating that within this value range, B has a greater impact on the heat dissipation performance (that is, the sensitive direction of B); however, when B continues to increase from 10mm to 20mm, the change in heat dissipation performance becomes very small, or even tends to be stable. Based on these observations, the value range of B can be narrowed to 5-10mm first, so as to more accurately explore the impact of B on heat dissipation performance in subsequent iterations; then see which values ​​of B can meet the heat dissipation performance within the range of 5-10mm. If the heat dissipation performance can be met when the value of B is within 7-10mm, the second data range of B will be narrowed to 7-10mm. At the same time, other parameters (such as A, a, b) will continue to be adjusted in the future, and their impact on the output results will be observed to determine whether they are also parameters in the sensitive direction, and their value ranges will be narrowed accordingly.

[0034] Based on the case where the fin height is a preset height value, within the second data range, actual tests are performed on the target parameters with different values ​​(which can be actual tests or numerical simulations) to determine the first data set of the target parameters, which is the data set when the heat dissipation performance of the radiator is the best in the test results. When the fin height is a preset value, the combination of the various parameters in the target parameters can reduce the thermal resistance of the radiator and make the flow resistance close to the flow resistance required by the cooling system, which is the data set with the best heat dissipation performance of the radiator.

[0035] Based on the first data set of target parameters, the minimum height value of the fin height under the premise of meeting the heat dissipation performance is determined through actual experiments. Take a set of target parameter values ​​from the first data set, take different fin heights for iteration, and finally find the minimum height value that can meet the heat dissipation performance. This step uses the height H as a variable for iteration, which is a key step for accurately optimizing H based on the previous two steps. Through this step, the minimum H value that meets the heat dissipation performance can be found. For example, when A, B, a, and b take a certain set of values, H can meet the heat dissipation performance when it is 8mm, and it can also meet the heat dissipation performance when H is 4mm, but it cannot meet the heat dissipation performance when H is 3mm, so H is 4mm.

[0036] In this embodiment, in order to solve the problem that different fin-type heat sink parameters cannot be quickly matched according to the requirements of different cooling systems in the prior art, improvements are made from two perspectives: structure and method for determining structural parameters. The structure of the heat sink fin 1 is made into a shape extending along a sine wave, and the various parameters in the fin 1 having a sinusoidal waveform are interrelated, which is convenient for DOE (Design of Experiments) experiments, and the fin-type heat sink cooling system formed by the sinusoidal fin can use a unified method to describe the relationship between thermal resistance and flow resistance; according to the correlation between the structural parameters of the heat sink fin 1, a corresponding parameter determination method is provided, which can quickly iterate fin parameters that can meet different heat dissipation requirements, accelerate the design iteration speed, reduce the iteration cost, and facilitate the platform design of the fin-type heat sink; and the minimum height H of the fin 1 is obtained, so that the fin 1 is minimized on the basis of being able to meet the cooling requirements. The smaller the height of the fin 1, the lower the production cost, and the volume of the heat sink will also be reduced accordingly, realizing the miniaturization of the heat sink, achieving the purpose of saving manufacturing costs, adapting to a variety of manufacturing methods, occupying a smaller installation space and facilitating placement.

[0037] Furthermore, when the target parameter includes the upper width of the fin and the lower width of the fin, the method further includes: based on the case where the fin height is the minimum value, taking different values ​​of the target parameter within the second data range to conduct actual tests, and determining a second data set of the target parameter, the second data set is the data set with the largest upper width of the fin and the largest lower width of the fin under the premise of meeting the heat dissipation performance of the radiator in the test results. Because when H remains unchanged, the larger a and b are, the less material is required for the heat dissipation body, which can further reduce the manufacturing cost of the heat dissipation body in the radiator.

[0038] When the target parameters include the upper width of the fin, the lower width of the fin and the fin period; the second data set can also be based on keeping the fin height at the minimum value, first making the upper width of the fin and the lower width of the fin as large as possible, and secondly making the period B as small as possible; under the condition that the requirements of system flow resistance and thermal resistance can be met, the smaller the period B, the smaller the length L of the fin 1 in the second direction. In this step, under the condition that the heat dissipation performance is met, a and b can be made as large as possible, and / or the fin period B can be made as small as possible, on the basis of keeping H at the minimum value, so as to reduce the material cost of the fin 1.

[0039] Furthermore, the structural parameters of the radiator also include: the width W of the heat dissipation body in the first direction, and the length L of the heat dissipation body in the second direction; "determining the first data range of the target parameter" also includes: determining the width and length of the heat dissipation body; determining the first data range of the target parameter based on the width and length. Figure 1 In the figure, X represents the first direction and Y represents the second direction.

[0040] Furthermore, "determine the width and length of the heat sink" is specifically: determine the width and length of the heat sink according to the size of the heat sink area. Under the same cooling system requirements, if only the area of ​​the heat sink area needs to be increased, the requirements can be met by increasing L and W, so that the fin-type heat sink can be platformized. In the actual production process, the width and length of the heat sink can also be determined according to the heat sink space reserved in the system.

[0041] Further, "determine the first data range of the target parameter according to the width and length" is specifically: the length is a multiple of the period, L = nB, where n is a positive number; determine the initial value range of the period B according to the length. After determining the length, combine the existing manufacturing process, for example: what size B can be processed by the existing equipment, and preliminarily determine the value range of B. In actual use, n is generally set to a positive integer, but there may be a case where n is a non-positive integer, such as n is 10.5, etc.

[0042] The width is a multiple of the sum of the amplitude and the upper width, W = m (A + a), where m is a positive integer; the initial value range of A and a is determined based on the width. After the width is determined, the value range of A and a is initially determined in combination with the existing manufacturing process, for example, how large the amplitude A can be processed by the existing equipment.

[0043] The width is an integer multiple of the lower width, W=qb, where q is a positive integer; the initial value range of b is determined based on the width. After the width is determined, the value range of b is initially determined in combination with the value of a.

[0044] It should be noted that if the cooling system requirements are the same and only the heat dissipation area needs to be increased, the requirement can be met by increasing L and / or W. The enlarged L may be an integer multiple of B or not an integer multiple of B; the enlarged W may be an integer multiple of the sum of A and a or not an integer multiple of the sum of A and a.

[0045] Furthermore, in order to facilitate the circulation of the coolant, b is generally set to be greater than or equal to a. When setting the initial value range of b, the relationship between a and b can be used to narrow the initial value range of a and b.

[0046] Furthermore, in the iterative process of determining the structural parameters, it was found that a, b, and H have a certain correlation. Generally, when the lower width is greater than or equal to 1.5 times the upper width and less than or equal to 2 times the upper width, that is, 1.5a≤b≤2a, the radiator can minimize H while meeting the requirements of different cooling systems.

[0047] Furthermore, a certain cooling system requires that the thermal resistance is 0.14°C / W and the flow resistance needs to reach 12KPa at a temperature of 25°C. Under the requirements of this cooling system, the iterative minimum value of the fin height H is in the range of 4±0.1mm. In order to facilitate processing and manufacturing, the minimum value of H is selected as 4mm.

[0048] Furthermore, the requirement of a certain cooling system is: thermal resistance is 0.14℃ / W, and at a temperature of 25℃, the flow resistance needs to reach 12Kpa. Under the requirements of this cooling system, the iterative optimal fin parameters are: a=1.8mm, b=3.4mm, H=4mm, A=0.5mm, B=9mm.

[0049] A radiator, the parameters of the radiator are determined according to the above-mentioned method for determining the structural parameters of the radiator.

[0050] like Figure 5 As shown, in one possible operation process:

[0051] S1: Determine target parameters that affect the heat dissipation performance of the radiator, the target parameters include: amplitude A, period B, upper width a and lower width b (here, the target parameters include fin amplitude A, fin period B, fin upper width a and fin lower width b as an example for explanation).

[0052] S2: Determine the width W and length L of the heat dissipation body according to the size of the heat dissipation area.

[0053] S3: According to W and length L, determine the first data range of A, B, a, b.

[0054] S4: Based on the situation that the fin height is a preset height value, actual tests are performed on the target parameter with different values ​​within the first data range to determine a second data range that satisfies the heat dissipation performance.

[0055] S5: Within the second data range, perform actual tests on different values ​​of the target parameter to determine a first data set of the target parameter.

[0056] S6: Based on the first data set of target parameters, determine the minimum height value of the fin under the premise of meeting the heat dissipation performance through actual experiments.

[0057] S7: Based on the case where the fin height is the minimum value, different values ​​of the target parameter are tested within the second data range to determine a second data set of the target parameter.

[0058] Further, if Figure 4As shown, the radiator further includes: a cover plate 2 and a bottom plate 3. The cover plate 2 is arranged on the bottom plate 3 to form a water channel cavity with the bottom plate 3. The heat dissipation body is arranged in the water channel cavity. The water channel cavity contains a cooling medium for taking away heat. The heat dissipation body, the cover plate 2 and the bottom plate 3 can be assembled together by brazing.

[0059] It should be pointed out that Figure 1 The number of fins of the heat dissipation body shown in the figure is only for example, and is not a limitation of the present invention. Without departing from the basic principle of the present invention, those skilled in the art may adopt other numbers of fins. Similarly, Figure 1 The period of the fins shown in the figure is also only for example, and those skilled in the art may adopt a larger or smaller period without departing from the basic principles of the present invention.

[0060] Those skilled in the art will appreciate that, although some embodiments described herein include certain features included in other embodiments but not other features, the combination of features of different embodiments is meant to be within the scope of the present application and form different embodiments. For example, in the claims of the present application, any one of the claimed embodiments may be used in any combination.

[0061] So far, the technical solutions of the present invention have been described in conjunction with the preferred embodiments shown in the accompanying drawings. However, it is easy for those skilled in the art to understand that the protection scope of the present invention is obviously not limited to these specific embodiments. Without departing from the principle of the present invention, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will fall within the protection scope of the present invention.

Claims

1. A radiator, characterized in that: The heat sink includes a heat dissipation body, which has a plurality of fins connected in sequence along a first direction, and the fins extend in a second direction according to a sinusoidal waveform y=A sin(2πx / B), and the cross-section of the fin waveform is a trapezoid; the lower width of the fin at the cross-section is greater than or equal to 1.5 times the upper width of the fin at the cross-section, and is less than or equal to 2 times the upper width of the fin at the cross-section.

2. The heat sink according to claim 1, characterized in that: The radiator further comprises: A cover plate (2) and a bottom plate (3), wherein the cover plate (2) is arranged on the bottom plate (3) and forms a water channel cavity between the cover plate (2) and the bottom plate (3), and the heat dissipation body is arranged in the water channel cavity; the water channel cavity is used to accommodate a cooling medium.

3. The heat sink according to claim 2, characterized in that: The heat dissipation body, the cover plate (2) and the bottom plate (3) are connected by welding.

4. The heat sink according to claim 1, characterized in that: The height of the fins ranges from 4±0.1 mm.

5. The heat sink according to claim 1, characterized in that The upper width of the fin is 1.8 mm, the lower width of the fin is 3.4 mm, the height of the fin is 4 mm, the amplitude of the fin is 0.5 mm, and the period of the fin is 9 mm.

6. A method for determining structural parameters of a radiator, characterized in that: The radiator is the radiator according to any one of claims 1 to 3, and the method comprises: Determine a target parameter affecting the heat dissipation performance of the heat sink, wherein the target parameter includes at least one of a fin amplitude, a fin period, an upper fin width, and a lower fin width; determining a first data range of the target parameter; Based on the case where the fin height is a preset height value, performing actual tests on the target parameter with different values ​​within the first data range to determine a second data range that satisfies the heat dissipation performance, wherein the second data range is smaller than the first data range; Within the second data range, taking different values ​​of the target parameter to conduct actual tests to determine a first data set of the target parameter, wherein the first data set is a data set when the heat dissipation performance of the radiator is optimal in the test results; Based on the first data set of the target parameters, a minimum height value of the fin under the premise of satisfying the heat dissipation performance is determined through actual experiments.

7. The method for determining the structural parameters of a radiator according to claim 6, characterized in that: The target parameters include the upper width of the fin and the lower width of the fin; The method further comprises: Based on the situation that the fin height is the minimum value, actual tests are performed on the target parameter with different values ​​within the second data range to determine a second data set of the target parameter, wherein the second data set is a data set in which the upper width of the fin and the lower width of the fin are the largest under the premise of meeting the heat dissipation performance of the radiator in the test results.

8. The method for determining the structural parameters of a radiator according to claim 6, characterized in that: The structural parameters of the heat sink also include: the width of the heat sink body in the first direction and the length of the heat sink body in the second direction; "Determining the first data range of the target parameter" also includes: Determining the width and length of the heat dissipation body; A first data range of the target parameter is determined according to the width and the length.

9. The method for determining the structural parameters of a heat sink according to claim 8, characterized in that: The “determining the width and length of the heat dissipation body” is specifically: The width and length of the heat dissipation body are determined according to the size of the heat dissipation area.

10. The method for determining the structural parameters of a heat sink according to claim 8, characterized in that: The “determining the first data range of the target parameter according to the width and the length” is specifically: The length is a multiple of the period, and a preliminary value range of the period is determined according to the length; The width is a multiple of the sum of the amplitude and the upper width, and the initial value range of the amplitude and the upper width is determined according to the width; The width is an integer multiple of the lower width; and a preliminary value range of the lower width is determined according to the width.

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