Slotted water-drop-shaped fin micro-channel heat sink

Abstract

The utility model relates to the technical field of heat exchangers, and discloses a slotted water-drop-shaped fin microchannel heat sink which comprises a heat sink upper cover plate and a heat sink lower cavity, the heat sink upper cover plate and the heat sink lower cavity are connected in a sealed mode to form a heat exchange cavity, the heat sink upper cover plate is provided with a liquid inlet and a liquid outlet, and the liquid inlet and the liquid outlet are communicated with the heat exchange cavity. The liquid inlet and the liquid outlet are communicated with the heat exchange cavity, a micro-channel unit is arranged in the heat exchange cavity, the micro-channel unit comprises a plurality of fins which are distributed in an array mode, and each fin is in a water drop shape and comprises an arc end and a sharp corner end opposite to the arc end; a first through groove and a second through groove are formed in the arc end in the direction facing the sharp corner end in a spaced mode, and the arc end is a fluid input end. The utility model has the following technical effects: 1, the heat transfer surface area is increased, and the heat exchange efficiency is improved; resistance is reduced, and system efficiency is improved; accumulation of dirt and sediments is reduced, and the maintenance cost is reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of heat exchangers, and in particular relates to a slotted water drop-shaped fin microchannel heat sink. Background Art

[0002] In engineering, heat exchangers, as key components for heat energy conversion and fluid cooling, are essential for maintaining thermodynamic balance and operating efficiency of industrial systems and civil equipment. The performance optimization of heat exchangers, especially the enhancement of their heat transfer efficiency, has always been a core topic in engineering thermodynamics and fluid mechanics research.

[0003] In existing heat exchanger design practices, fin structures are widely used to increase the contact area between the fluid and the heat exchange surface, thereby improving the heat transfer efficiency. The fins disturb the flow of the fluid and induce the formation of vortices between the fins. This fluid dynamic behavior helps to enhance the local heat transfer coefficient. However, the use of fins is also accompanied by several design challenges: first, the heat transfer surface area of ​​the traditional flat fin structure is small and the heat transfer efficiency is not improved; second, the presence of fins increases the resistance to fluid flow, which not only leads to an increase in pumping power, but also may cause additional energy consumption; and, the fin structure may become a gathering point for dirt and deposits, which will reduce the heat exchange efficiency, increase maintenance costs, and may shorten the service life of the heat exchanger. Utility Model Content

[0004] In order to address the deficiencies of the prior art, the utility model provides a slotted teardrop-shaped fin microchannel heat sink, which achieves the purpose of increasing the heat transfer surface area, improving heat exchange efficiency, reducing resistance, improving system efficiency, reducing the accumulation of dirt and sediment, and reducing maintenance costs.

[0005] The technical purpose to be achieved by the utility model is achieved through the following technical solutions:

[0006] The utility model provides a slotted water drop-shaped fin microchannel heat sink, the microchannel heat sink comprises a heat sink upper cover plate and a heat sink lower cavity, the heat sink upper cover plate and the heat sink lower cavity are sealed and connected to form a heat exchange cavity;

[0007] The heat sink upper cover plate is provided with a liquid inlet and a liquid outlet, and the liquid inlet and the liquid outlet are connected to the heat exchange cavity;

[0008] A microchannel unit is arranged in the heat exchange cavity, and the microchannel unit includes a plurality of fins distributed in an array;

[0009] The fin is teardrop-shaped, including an arc end and a pointed end opposite to the arc end, the arc end is provided with a first through groove and a second through groove spaced apart in a direction toward the pointed end, and the arc end is a fluid input end.

[0010] In some implementations, the radius of the arc end is 1.70-1.80 mm, and the distance between the pointed end and the two endpoints on the arc end is 3.80-4.20 mm, that is, the fin is a symmetrical structure along its center line. This structural design can better guide the flow of fluid, and the limitations under this size can meet the requirements of microneedle fin design, while achieving better heat exchange efficiency.

[0011] In some implementations, the width of the first through groove and the second through groove are both 1.00-1.20 mm, which are used to limit the flow rate of the fluid to ensure the heat exchange effect.

[0012] In some implementations, the height of the fins is 2.00-2.20 mm, which limits the flow rate of the entire fluid to ensure the heat exchange effect.

[0013] In some implementations, the spacing between two adjacent fins distributed along the fluid direction is 0.70-0.80 mm. This spacing design can increase the heat transfer surface area and improve the heat exchange efficiency.

[0014] In some implementations, the spacing between two adjacent fins distributed perpendicular to the fluid direction is 0.85-0.95 mm. This spacing design can increase the heat transfer surface area and improve the heat exchange efficiency.

[0015] In some implementations, the liquid inlet is connected to a liquid inlet copper tube, and the liquid outlet is connected to a liquid outlet copper tube, and the liquid inlet copper tube and the liquid outlet copper tube respectively play a role in liquid input and liquid outlet.

[0016] In some implementations, the liquid inlet copper tube and the liquid outlet copper tube are both hollow cylindrical copper tubes with an outer diameter of 3.00-4.00 mm and an inner diameter of 2.00-3.00 mm, which limit the flow rate of the fluid to ensure the heat exchange effect.

[0017] In some implementations, a locking assembly is also included. Through holes for the locking assembly to pass through are provided at the edges of the upper cover plate of the heat sink and the lower cavity of the heat sink, thereby ensuring a locking connection between the upper cover plate of the heat sink and the lower cavity of the heat sink. The heat sink can also be disassembled when necessary to facilitate rework, etc.

[0018] In some implementations, a plurality of temperature detectors are installed inside the lower cavity of the heat sink to detect the temperature inside the heat exchange cavity and obtain the heat exchange condition of the microchannel heat sink.

[0019] In summary, the utility model has at least the following benefits:

[0020] 1. The slotted teardrop-shaped fin microchannel heat sink provided by the utility model designs the fin into a teardrop shape and has a first groove and a second groove, which significantly increases the heat transfer surface area. Compared with traditional flat fins, more surfaces are provided to contact the fluid, thereby improving the heat exchange efficiency. The teardrop-shaped structure can guide the fluid to form turbulence in the channel instead of laminar flow. This turbulent flow has a higher heat transfer coefficient, so that the fluid can absorb heat more effectively when in contact with the fins, further improving the heat transfer efficiency.

[0021] 2. The slotted teardrop-shaped fin microchannel heat sink provided by the utility model reduces resistance and requires less energy to push the fluid compared to traditional flat fins, thereby reducing the energy consumption of the pump and improving system efficiency.

[0022] 3. The slotted teardrop-shaped fin microchannel heat sink provided by the utility model reduces the accumulation of dirt and sediment, reduces the frequency of cleaning and maintenance, thereby reducing maintenance costs, and at the same time increases the service life of the microchannel, ensuring that the channel can maintain efficient heat exchange after long-term use. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the structure of the microchannel heat sink of Examples 1 and 2 of the utility model;

[0024] Figure 2 It is a schematic diagram of the structure of the heat sink lower cavity of Examples 1 and 2 of the utility model;

[0025] Figure 3 It is a schematic diagram of the structure of the fins of Examples 1 and 2 of the utility model;

[0026] Figure 4 This is a schematic structural diagram of a microchannel heat sink according to Example 3 of the utility model;

[0027] 100. Heat sink upper cover plate;

[0028] 200, heat sink lower cavity;

[0029] 300, liquid inlet;

[0030] 400. Liquid outlet;

[0031] 500, microchannel unit; 510, fin; 511, arc end; 512, sharp end; 513, first through groove; 514, second through groove;

[0032] 600, liquid inlet copper tube;

[0033] 700, liquid outlet copper tube;

[0034] 800, locking assembly;

[0035] 900. Temperature detector. DETAILED DESCRIPTION

[0036] In order to make the purpose, technical solution and advantages of the implementation of the utility model clearer, the technical solution in the implementation of the utility model will be clearly and completely described below in conjunction with the drawings in the implementation of the utility model. The described implementation is a part of the implementation of the utility model, not all of the implementations.

[0037] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the present invention for which protection is sought, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0038] Embodiment 1:

[0039] See also Figure 1-Figure 3 , a slotted teardrop-shaped fin 510 microchannel heat sink, can be used in industrial manufacturing, air conditioning systems, cooling systems and other fields, and can also be used in automotive engineering and other occasions requiring heat exchange or cooling.

[0040] The microchannel heat sink includes a heat sink upper cover plate 100 and a heat sink lower cavity 200, which are sealed and connected to form a heat exchange cavity. That is, the fluid enters the heat exchange cavity for heat exchange, and the heat sink upper cover plate 100 and the heat sink lower cavity 200 are sealed and connected to ensure the sealing and stability of the fluid during heat exchange. It can be understood that the sealed connection can be achieved by adding a mosaic structure or installing a sealing ring at the connection between the edge of the heat sink upper cover plate 100 and the edge of the heat sink lower cavity 200 to achieve a sealing effect, which is not limited here.

[0041] The heat sink upper cover plate 100 is provided with a liquid inlet 300 and a liquid outlet 400 , both of which are connected to the heat exchange cavity. The liquid enters the heat exchange cavity through the liquid inlet 300 to flow and exchange heat, and then is output through the liquid outlet 400 .

[0042] A microchannel unit 500 is arranged in the heat exchange cavity, and the microchannel unit 500 includes a plurality of fins 510 distributed in an array. For example, in an application scenario, the direction along the fluid flow is the left-right direction, and the direction perpendicular to the fluid flow is the front-back direction. The microchannel unit 500 includes 6 groups of fins 510 distributed in the left-right direction, and each group of fins 510 includes 5 fins 510 arranged in the front-back direction, that is, 30 fins 510 distributed in an array are arranged in the heat exchange cavity. Of course, the specific array distribution number of the fins 510 is not limited in this embodiment, and can be adjusted according to actual needs.

[0043] The fin 510 is teardrop-shaped, including a circular arc end 511 and a pointed end 512 opposite to the circular arc end 511 , wherein the circular arc end 511 is provided with a first through groove 513 and a second through groove 514 spaced apart in a direction toward the pointed end 512 , and the circular arc end 511 is a fluid input end.

[0044] It is known that the water drop-shaped structure usually includes an arc end 511 and a pointed end 512. In the present embodiment, the arc end 511 is the fluid input end, that is, after the liquid enters the heat exchange cavity through the liquid inlet 300, during the flow of the liquid, when passing through each fin 510, the liquid can be diverted to flow in along the first through groove 513 and the second through groove 514 close to the arc end 511, and then flow out from the first through groove 513 and the second through groove 514 close to the pointed end 512. Of course, some liquid still flows between adjacent fins 510.

[0045] In this embodiment, the fin 510 is designed to be teardrop-shaped, and a first through groove 513 and a second through groove 514 are provided in the direction from the arc end 511 toward the pointed end 512. The arc shape of the arc end 511 can guide the flow of the liquid. Compared with the conventional flat fin 510 structure, it can help maintain the uniformity of the fluid flow, increase the heat exchange area, enhance the disturbance of the fluid in the microchannel unit 500, and reduce the flow resistance, thereby achieving the purpose of enhancing heat exchange and reducing energy loss at the same time.

[0046] Embodiment 2:

[0047] The difference between this embodiment and embodiment 1 is that this embodiment further optimizes the structure of the microchannel heat sink of the utility model, see Figure 1-Figure 3 .

[0048] The radius of the arc end 511 is 1.70-1.80 mm, and the distance between the pointed end 512 and the two end points on the arc end 511 is 3.80-4.20 mm, that is, the fin 510 is a symmetrical structure along its center line. This structural design can better guide the flow of fluid, and the limitations under this size can meet the requirements of microneedle fin design and achieve better heat exchange efficiency.

[0049] For example, the radius of the arc end 511 is 1.75 mm, the arc end 511 includes a first endpoint and a second endpoint, the distance between the pointed end 512 and the first endpoint on the arc end 511 is 4.00 mm, and the distance between the pointed end 512 and the second endpoint on the arc end 511 is also 4.00 mm, that is, the teardrop-shaped fin 510 presents a symmetrical structure. It can be further understood that the teardrop-shaped fin 510 is composed of a semicircular structure and an isosceles triangle structure.

[0050] The design of the symmetrical structure can better guide the fluid flow and maintain the uniformity of the fluid flow process, thereby improving the heat exchange efficiency.

[0051] In some embodiments, the width of the first through groove 513 and the second through groove 514 are both 1.00-1.20 mm, which are used to limit the flow rate of the fluid to ensure the heat exchange effect.

[0052] For example, the widths of the first through groove 513 and the second through groove 514 are both 1.00 mm. The width direction is understood as the distance between the two opposite side walls of the first through groove 513 and the distance between the two side walls of the second through groove 514. The limitation of the width dimension can increase the heat exchange area, enhance the disturbance of the fluid in the microchannel unit 500, and reduce the flow resistance, thereby achieving the purpose of enhancing heat exchange and reducing energy loss at the same time.

[0053] In some embodiments, the height of the fin 510 is 2.00-2.20 mm. Limiting the height of the fin 510 can limit the flow rate of the entire fluid to ensure the heat exchange effect. For example, the height of the fin 510 is 2.00 mm.

[0054] In some embodiments, the spacing between two adjacent fins 510 distributed along the fluid direction is 0.70-0.80 mm, and this spacing design can increase the heat transfer surface area and improve the heat exchange efficiency. The spacing between two adjacent fins 510 distributed perpendicular to the fluid direction is 0.85-0.95 mm, and this spacing design can increase the heat transfer surface area and improve the heat exchange efficiency.

[0055] For example, the spacing between two adjacent fins 510 distributed along the fluid direction is 0.75 mm, and the spacing between two adjacent fins 510 distributed perpendicular to the fluid direction is 0.90 mm. Through this array-like distribution of fins 510, the fluid can generate more disturbances during the flow process, promote the mixing of cold and hot fluids, and achieve the purpose of reducing thermal resistance.

[0056] Embodiment 3:

[0057] The difference between this embodiment and embodiment 1 is that this embodiment further optimizes the structure of the microchannel heat sink of the utility model, see Figure 4 .

[0058] The liquid inlet 300 is connected to a liquid inlet copper tube 600 , and the liquid outlet 400 is connected to a liquid outlet copper tube 700 . The liquid inlet copper tube 600 and the liquid outlet copper tube 700 respectively play a role of liquid input and liquid outlet.

[0059] The liquid inlet copper tube 600 and the liquid outlet copper tube 700 are both hollow cylindrical copper tubes with an outer diameter of 3.00-4.00 mm and an inner diameter of 2.00-3.00 mm, which limit the flow rate of the fluid to ensure the heat exchange effect.

[0060] For example, the liquid inlet copper tube 600 and the liquid outlet copper tube 700 are both hollow cylindrical copper tubes with an outer diameter of 3.00 mm and an inner diameter of 2.00 mm. The number of the liquid inlet 300 and the liquid outlet 400 provided on the heat sink upper cover plate 100 are both two. Correspondingly, the number of the liquid inlet copper tube 600 and the liquid outlet copper tube 700 are also two. In this example, a double-pass inlet method is adopted to ensure that the fluid can flow through the water drop-shaped fins 510 more evenly after entering the microchannel unit 500, so that the heat exchange can be more fully carried out.

[0061] In some embodiments, the microchannel heat sink also includes a locking assembly 800, and through holes for the locking assembly 800 to pass through are provided at the edges of the heat sink upper cover plate 100 and the heat sink lower cavity 200, thereby ensuring a locking connection between the heat sink upper cover plate 100 and the heat sink lower cavity 200. At the same time, they can also be disassembled when necessary to facilitate rework, etc.

[0062] For example, 8 through holes for the locking assembly 800 to pass through are provided at the edges of the upper cover plate 100 of the heat sink and the lower cavity 200 of the heat sink. The 8 through holes are evenly distributed around the edges of the upper cover plate 100 of the heat sink and the lower cavity 200 of the heat sink. Correspondingly, the number of the locking assembly 800 is also 8 groups. After the 8 groups of locking assemblies 800 pass through the through holes on the upper cover plate 100 of the heat sink and the lower cavity 200 of the heat sink, respectively, the upper cover plate 100 of the heat sink and the lower cavity 200 of the heat sink are locked. The locking assembly 800 may include bolts and nuts. After the bolts pass through the through holes on the upper cover plate 100 of the heat sink and the lower cavity 200 of the heat sink, they are locked by nuts, that is, they play a locking connection role. It should be noted that the number of through holes, the specific distribution position and the structure of the locking assembly 800 are not limited in this example, and they can all be adjusted according to actual conditions.

[0063] In some embodiments, a plurality of temperature detectors 900 are installed inside the heat sink lower cavity 200 to detect the temperature inside the heat exchange cavity and obtain the heat exchange condition of the microchannel heat sink.

[0064] For example, the number of the temperature detectors 900 is four, and correspondingly, four mounting holes for mounting the temperature detectors 900 are opened inside the heat sink lower cavity 200, and the mounting holes are evenly spaced to ensure the accuracy of temperature detection.

[0065] The slotted teardrop-shaped fin microchannel heat sink of the utility model designs the fin into a teardrop shape and has a first groove and a second groove, which significantly increases the heat transfer surface area. Compared with traditional flat fins, more surfaces are provided to contact the fluid, thereby improving the heat exchange efficiency. The teardrop-shaped structure can guide the fluid to form turbulence in the channel rather than laminar flow. This turbulent flow has a higher heat transfer coefficient, so that the fluid can absorb heat more effectively when in contact with the fins, further improving the heat transfer efficiency; reducing resistance, compared with traditional flat fins, only less energy is required to push the fluid, reducing the energy consumption of the pump and improving the system efficiency; reducing the accumulation of dirt and sediment, reducing the frequency of cleaning and maintenance, thereby reducing maintenance costs, and at the same time, increasing the service life of the microchannel, ensuring that the channel can maintain efficient heat exchange after long-term use.

[0066] In the present invention, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", "fix" and the like 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, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0067] In the description of the present utility model, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate the orientation or position relationship based on the orientation or position relationship shown in the accompanying drawings, or the orientation or position relationship in which the utility model product is usually placed when in use, which is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0068] In addition, the terms "horizontal", "vertical", "overhanging" and the like do not mean that the components are required to be absolutely horizontal or overhanging, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0069] In the present utility model, unless otherwise clearly specified and limited, the first feature being above or below the second feature may include the first and second features being in direct contact, or may include the first and second features not being in direct contact but being in contact through another feature between them. Moreover, the first feature being above, above, and above the second feature includes the first feature being directly above and obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. The first feature being below, below, and below the second feature includes the first feature being directly below and obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0070] Although the utility model is described in conjunction with the above specific embodiments, it is obvious that those skilled in the art can make many substitutions, modifications and changes based on the above content. Therefore, all such substitutions, improvements and changes are included in the spirit and scope of the appended claims.

Claims

1. A slotted teardrop-shaped fin microchannel heat sink, characterized in that: The microchannel heat sink comprises a heat sink upper cover plate (100) and a heat sink lower cavity (200), wherein the heat sink upper cover plate (100) and the heat sink lower cavity (200) are sealed and connected to form a heat exchange cavity; The heat sink upper cover plate (100) is provided with a liquid inlet (300) and a liquid outlet (400), and the liquid inlet (300) and the liquid outlet (400) are in communication with the heat exchange cavity; A microchannel unit (500) is disposed in the heat exchange cavity, and the microchannel unit (500) includes a plurality of fins (510) distributed in an array; The fin (510) is teardrop-shaped, comprising a circular arc end (511) and a pointed end (512) opposite to the circular arc end (511); the circular arc end (511) is provided with a first through groove (513) and a second through groove (514) spaced apart in a direction toward the pointed end (512); and the circular arc end (511) is a fluid input end.

2. The slotted teardrop-shaped fin microchannel heat sink according to claim 1, characterized in that: The radius of the arc end (511) is 1.70-1.80 mm, and the distance between the pointed end (512) and two end points on the arc end (511) is 3.80-4.20 mm.

3. The slotted teardrop-shaped fin microchannel heat sink according to claim 2, characterized in that: The width of the first through groove (513) and the second through groove (514) are both 1.00-1.20 mm.

4. The slotted teardrop-shaped fin microchannel heat sink according to claim 1, characterized in that: The height of the fin (510) is 2.00-2.20 mm.

5. The slotted teardrop-shaped fin microchannel heat sink according to claim 1, characterized in that: The distance between two adjacent fins (510) distributed along the fluid direction is 0.70-0.80 mm.

6. The slotted teardrop-shaped fin microchannel heat sink according to claim 1, characterized in that: The distance between two adjacent fins (510) distributed perpendicularly to the fluid direction is 0.85-0.95 mm.

7. The slotted teardrop-shaped fin microchannel heat sink according to claim 1, characterized in that: The liquid inlet (300) is connected to a liquid inlet copper tube (600), and the liquid outlet (400) is connected to a liquid outlet copper tube (700).

8. The slotted teardrop-shaped fin microchannel heat sink according to claim 7, characterized in that: The liquid inlet copper tube (600) and the liquid outlet copper tube (700) are both hollow cylindrical copper tubes with an outer diameter of 3.00-4.00 mm and an inner diameter of 2.00-3.00 mm.

9. The slotted teardrop-shaped fin microchannel heat sink according to claim 1, characterized in that: It also includes a locking assembly (800), and through holes for the locking assembly (800) to pass through are provided at the edges of the heat sink upper cover plate (100) and the heat sink lower cavity (200).

10. The slotted teardrop-shaped fin microchannel heat sink according to any one of claims 1 to 9, characterized in that: A plurality of temperature detectors (900) are installed inside the heat sink lower cavity (200).

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