Liquid cooling power module heat sink structure with groove pin teeth

Abstract

The invention belongs to the technical field of liquid cooling radiators, particularly relates to a liquid cooling power module heat sink structure with groove pin teeth, and aims to solve the problem that the heat dissipation efficiency provided by heat dissipation teeth of a liquid cooling radiator of a power module in an existing form is insufficient to meet requirements due to continuous improvement of power density and continuous improvement of chip heat dissipation requirements. According to the scheme, the heat dissipation structure comprises a heat dissipation substrate; the multiple heat dissipation teeth are fixedly connected to the bottom of the heat dissipation substrate at equal intervals; and the water jacket is fixedly connected to the bottom of the heat dissipation substrate. According to the liquid cooling power module heat sink structure with the groove pin teeth, the heat dissipation teeth of the groove tooth-shaped structure can be different from traditional circular and rhombic heat dissipation teeth, the surface heat exchange area and the turbulence degree can be remarkably improved, and therefore the heat exchange performance is improved, the chip temperature is reduced, and the heat dissipation efficiency is improved. Meanwhile, the radiating teeth of the groove tooth-shaped structure can break the trailing vortex and reduce the flow resistance, and the distance between the radiating teeth is increased.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of liquid cooling heat sink, and particularly relates to a liquid cooling power module heat sink structure with grooved pin teeth. BACKGROUND

[0002] The liquid cooling heat sink is a device for circulating heat dissipation by using cooling liquid, and the water cooling heat dissipation system circulates the cooling liquid in the heat dissipation pipe by using a pump to dissipate heat, and the heat absorption part on the heat sink is used to absorb heat, and the heat absorbed by the heat absorption part is discharged through the heat sink designed on the back of the machine body, and has the advantages of silence and fast heat dissipation.

[0003] In the prior art, the heat dissipation teeth of the liquid cooling heat sink of the power module are mainly circular, rhombic, elliptical, powder injection special-shaped and micro-cut fins, but as the power density is continuously improved, the demand for chip heat dissipation is continuously improved, and the heat dissipation efficiency provided by the heat dissipation teeth of the current form of the power module liquid cooling heat sink is insufficient to meet the demand. SUMMARY

[0004] The present application discloses a liquid cooling power module heat sink structure with grooved pin teeth, which aims to solve the technical problem that the heat dissipation efficiency provided by the heat dissipation teeth of the current form of the power module liquid cooling heat sink is insufficient to meet the demand due to the continuous improvement of the power density and the continuous improvement of the demand for chip heat dissipation in the background art.

[0005] The present application provides a liquid cooling power module heat sink structure with grooved pin teeth, which comprises a heat dissipation base plate.

[0006] A plurality of heat dissipation teeth are fixedly connected to the bottom of the heat dissipation base plate at equal intervals.

[0007] A water jacket is fixedly connected to the bottom of the heat dissipation base plate.

[0008] A flow-out pipe is fixedly connected to one side of the water jacket.

[0009] A flow rate adjusting module is arranged on the water jacket, and the flow rate adjusting module comprises a flow-in pipe fixedly connected to the side of the water jacket away from the flow-out pipe, two mounting holes are formed in the flow-in pipe, two shafts are rotatably connected in the two mounting holes, and adjusting flow guide plates are fixedly connected to the outer portions of the two shafts.

[0010] In a preferred scheme, the plurality of heat dissipation teeth are all rhombic teeth, and grooves are formed in the plurality of surfaces of the plurality of heat dissipation teeth.

[0011] In a preferred scheme, a plurality of flow channels are equidistantly arranged inside the water jacket, and two corresponding fixing holes are arranged on the water jacket, and a liquid inlet pipe and a liquid outlet pipe are fixedly connected in the two fixing holes respectively.

[0012] In a preferred scheme, a connecting layer one is arranged above the heat dissipation substrate, a metal connecting layer is arranged above the connecting layer one, an insulating substrate is arranged above the metal connecting layer, and a conductive metal layer is arranged above the insulating substrate.

[0013] In a preferred scheme, a plurality of connecting layers two are arranged on the top of the conductive metal layer, a plurality of power chips are arranged above the connecting layers two respectively, a connecting layer three is arranged above the plurality of power chips respectively, and a conductive metal piece is arranged above one of the connecting layers two on one side of the plurality of power chips, and the bottom of the end of the conductive metal piece away from the connecting layer two is fixedly connected with the top of the plurality of connecting layers three.

[0014] In a preferred scheme, a plurality of lead frames are arranged above the two connecting layers two on the two sides respectively.

[0015] In a preferred scheme, the flow speed adjusting module further comprises a mounting sleeve, a mounting groove is arranged on the top of the water jacket, the mounting sleeve is fixedly connected in the mounting groove, and the top of the mounting sleeve is in contact with the bottom of the heat dissipation substrate.

[0016] In a preferred scheme, a piston piece is slidably connected with the inner wall of the mounting sleeve, and a connecting rod piece is fixedly connected on one side of the piston piece.

[0017] In a preferred scheme, a sliding tooth rod is slidably connected with the top of the flow inlet pipe, and the bottom of the end of the connecting rod piece away from the piston piece is fixedly connected with the top of the sliding tooth rod.

[0018] In a preferred scheme, gears are fixedly connected with the upper ends of the two rotating shafts respectively, and the two gears are mutually engaged with the sliding tooth rod.

[0019] As can be seen from the above, the liquid cooling power module heat sink structure with grooved needle teeth provided by the application can cover the chip heating area by the heat dissipation teeth of the grooved tooth structure, can be distinguished from the traditional circular and rhombic heat dissipation teeth, can significantly improve the surface heat exchange area and the turbulence degree, thereby improving the heat exchange performance and reducing the chip temperature, meanwhile, the grooved tooth structure heat dissipation teeth can break the tail vortex, reduce the flow resistance, and increase the distance between the heat dissipation teeth, thereby reducing the risk of blockage. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 The figure is a schematic diagram of the overall structure of the liquid cooling power module heat sink structure with grooved needle teeth provided by the application.

[0021] Figure 2 A cross-sectional structure schematic diagram of a liquid-cooled power module heat sink structure with grooved needle teeth is proposed in the present application;

[0022] Figure 3 A water jacket internal and heat dissipation tooth structure schematic diagram of a liquid-cooled power module heat sink structure with grooved needle teeth is proposed in the present application;

[0023] Figure 4 A flow speed adjusting module structure schematic diagram of a liquid-cooled power module heat sink structure with grooved needle teeth is proposed in the present application;

[0024] Figure 5 A heat dissipation tooth cross-section one structure schematic diagram of a liquid-cooled power module heat sink structure with grooved needle teeth is proposed in the present application;

[0025] Figure 6 A heat dissipation tooth cross-section two structure schematic diagram of a liquid-cooled power module heat sink structure with grooved needle teeth is proposed in the present application;

[0026] Figure 7 A heat dissipation tooth cross-section three structure schematic diagram of a liquid-cooled power module heat sink structure with grooved needle teeth is proposed in the present application;

[0027] Figure 8 A heat dissipation tooth arrangement schematic diagram of a liquid-cooled power module heat sink structure with grooved needle teeth is proposed in the present application;

[0028] Figure 9 A multi-layer heat dissipation tooth schematic diagram of a liquid-cooled power module heat sink structure with grooved needle teeth is proposed in the present application.

[0029] In the figure: 1, heat dissipation substrate; 2, water jacket; 3, flow speed adjusting module; 301, flow inlet pipe; 302, mounting sleeve; 303, piston piece; 304, connecting rod piece; 305, sliding tooth rod; 306, rotating shaft; 307, adjusting flow guide plate; 308, gear; 4, connecting layer one; 5, metal connecting layer; 6, insulating substrate; 7, conductive metal layer; 8, connecting layer two; 9, power chip; 10, connecting layer three; 11, conductive metal piece; 12, lead frame; 13, liquid inlet pipe; 14, liquid outlet pipe; 15, heat dissipation tooth; 16, flow outlet pipe. DETAILED DESCRIPTION

[0030] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all the embodiments.

[0031] The application discloses a liquid-cooled power module heat sink structure with grooved needle teeth, which is mainly applied to the scene that the existing power module liquid cooling radiator cannot meet the demand of heat dissipation due to the continuous improvement of power density and the continuous improvement of chip heat dissipation demand.

[0032] Embodiment one

[0033] With reference to Figures 1-8 A liquid-cooled power module heat sink structure with grooved needle teeth, comprising a heat dissipation base plate 1;

[0034] A plurality of heat dissipation teeth 15 are fixedly connected to the bottom of the heat dissipation base plate 1 at equal intervals.

[0035] A water jacket 2 is fixedly connected to the bottom of the heat dissipation base plate 1.

[0036] An outflow pipe 16 is fixedly connected to one side of the water jacket 2.

[0037] A flow rate adjusting module 3 is arranged on the water jacket 2, and the flow rate adjusting module 3 comprises an inflow pipe 301 fixedly connected to the side of the water jacket 2 away from the outflow pipe 16, two mounting holes are formed in the inflow pipe 301, two shafts 306 are rotatably connected in the two mounting holes, adjusting flow guide plates 307 are fixedly connected to the outer portions of the two shafts 306, and the flow rate adjusting module 3 adjusts the flow rate of the heat exchange cooling liquid according to the temperature of the heat dissipation base plate 1, so as to change the heat exchange efficiency.

[0038] With reference to Figure 1 、 Figure 2 and Figure 3 The plurality of heat dissipation teeth 15 are all diamond-shaped teeth, and grooves are formed in the plurality of surfaces of the plurality of heat dissipation teeth 15.

[0039] With reference to Figure 1 、 Figure 2 and Figure 3 A plurality of flow channels are formed in the water jacket 2 at equal intervals, and two corresponding fixing holes are formed in the water jacket 2, and an inflow pipe 13 and an outflow pipe 14 are fixedly connected in the two fixing holes respectively.

[0040] With reference to Figure 1 、 Figure 2 and Figure 3 A connecting layer one 4 is arranged above the heat dissipation base plate 1, a metal connecting layer 5 is arranged above the connecting layer one 4, an insulating substrate 6 is arranged above the metal connecting layer 5, and a conductive metal layer 7 is arranged above the insulating substrate 6.

[0041] With reference to Figure 1 、 Figure 2 and Figure 3The top of the conductive metal layer 7 is provided with a plurality of connection layers two 8, the upper side of each of the plurality of connection layers two 8 is provided with a power chip 9, the upper side of each of the plurality of power chips 9 is provided with a connection layer three 10, and the upper side of one of the connection layers two 8 on one side of the plurality of power chips 9 is provided with a conductive metal piece 11, and the bottom of the end of the conductive metal piece 11 away from the connection layer two 8 is fixedly connected to the top of the plurality of connection layer threes 10.

[0042] Referring to Figure 1 , Figure 2 and Figure 3 , the upper side of each of the two connection layers two 8 on both sides is provided with a plurality of lead frames 12.

[0043] In a specific application scenario, the heat transfer cooling liquid is injected between the heat dissipation base plate 1 and the water jacket 2 through the liquid inlet pipe 13, absorbs the heat conducted by the heat dissipation teeth 15, and when the heat transfer cooling liquid flows through the heat dissipation teeth 15, the recesses on the surfaces of the heat dissipation teeth 15 increase the heat exchange area and disrupt the flow trajectory of the heat transfer cooling liquid, causing irregular flow, stirring the boundary layer between the heat dissipation teeth 15 and the heat transfer cooling liquid, and reducing the thermal resistance; the heat transfer cooling liquid is injected through the flow inlet pipe 301, discharged through the flow outlet pipe 16 after flowing through the internal flow channel of the water jacket 2, and absorbs and carries away the heat transferred by the heat transfer cooling liquid while flowing; in use, the surface heat exchange area and the turbulence degree can be significantly improved, thereby improving the heat exchange performance and reducing the chip temperature, and the recess tooth structure heat dissipation teeth 15 can break the trailing vortex, reduce the flow resistance, and increase the distance between the heat dissipation teeth 15, thereby reducing the risk of blockage.

[0044] Referring to Figure 1 , Figure 3 and Figure 4 , the flow speed adjusting module 3 further comprises a mounting sleeve 302, the top of the water jacket 2 is provided with a mounting groove, the mounting sleeve 302 is fixedly connected in the mounting groove, and the top of the mounting sleeve 302 is in contact with the bottom of the heat dissipation base plate 1.

[0045] Referring to Figure 1 , Figure 3 and Figure 4 , the inner wall of the mounting sleeve 302 is slidably connected with a piston 303, and one side of the piston 303 is fixedly connected with a connecting rod 304.

[0046] Referring to Figure 1 , Figure 3 and Figure 4 , the top of the flow inlet pipe 301 is slidably connected with a sliding tooth rod 305, and the bottom of the end of the connecting rod 304 away from the piston 303 is fixedly connected to the top of the sliding tooth rod 305.

[0047] Referring to Figure 1 ,Figure 3 and Figure 4 The upper end of each of the two rotating shafts 306 is fixedly connected with a gear 308, and the two gears 308 are in meshing connection with the sliding toothed rod 305.

[0048] In a specific application scenario, when the heat transferred by the heat dissipation base plate 1 increases and the temperature rises, because the mounting sleeve 302 is in contact with the heat dissipation base plate 1, the gas inside the mounting sleeve 302 expands by thermal expansion and contraction, pushing the piston 303 to slide outward, and the connecting rod 304 pushes the sliding toothed rod 305 to slide on the flow inlet pipe 301. Because the teeth of the sliding toothed rod 305 are in meshing connection with the gears 308, the sliding toothed rod 305 moves to mesh the rotating gears 308 and the rotating shafts 306, thereby driving the adjusting guide plate 307 to rotate inward to close, reducing the flow inner diameter, increasing the flow rate of the heat exchange cooling liquid, and increasing the heat exchange efficiency. When the temperature decreases, the piston 303 drives the sliding toothed rod 305 to reset, the flow channel inner diameter increases, and the flow rate of the heat exchange cooling liquid decreases. During use, the flow rate adjusting module 3 can automatically adjust the flow rate of the heat exchange cooling liquid according to different temperatures, thereby adjusting the heat exchange efficiency, and realizing dynamic matching of the heat exchange efficiency and the temperature.

[0049] It should be noted that the heat dissipation base plate 1 and the water jacket 2, and the water jacket 2 and the components mounted on the water jacket 2, are coated with sealing material to play a role in bonding, fixing and sealing, and ensure the liquid cooling sealing performance.

[0050] Example Two

[0051] The liquid cooling power module heat sink structure with grooved needle teeth provided in Example One is further optimized, as shown in Figure 5 The heat dissipation teeth 15 with a grooved tooth structure are replaced with heat dissipation teeth 15 with rounded corners. When the heat transfer cooling liquid flows through the heat dissipation teeth 15, the fluid boundary layer is smoother, the local stress is reduced, the structure life is prolonged, the flow separation and turbulence are reduced, the resistance along the way is reduced, and the heat transfer cooling liquid can more uniformly cover the surface of the heat dissipation teeth 15, thereby improving the heat exchange efficiency.

[0052] Example Three

[0053] The liquid cooling power module heat sink structure with grooved needle teeth provided in Example One is further optimized, as shown in Figures 6-7As shown, the heat dissipation teeth 15 with one groove on each side are replaced by heat dissipation teeth 15 with different numbers of grooves on each side. By increasing the number of grooves in the incoming flow direction and the vortex direction, the contact area between the heat dissipation teeth 15 and the heat transfer coolant can be further increased, the heat exchange efficiency can be improved, and the turbulence of the heat transfer coolant flowing through the heat dissipation teeth 15 can be further strengthened. At the same time, the increased grooves can prolong the flow path of the heat transfer coolant, increase the contact time of the heat transfer coolant and the heat dissipation teeth 15, and further enhance heat absorption.

[0054] Example Four

[0055] The liquid-cooled power module heat sink structure with grooved needle teeth provided in Example One is further optimized, as shown in Figure 8 The heat dissipation teeth 15 that can be arranged throughout the radiator are replaced by heat dissipation teeth 15 arranged only at the corresponding positions of the chips, which can increase the flow of heat transfer coolant at the chip positions, further enhance the heat dissipation efficiency at the chip positions, avoid the risk of insufficient heat dissipation at the chip periphery, and significantly reduce fluid resistance.

[0056] Example Five

[0057] The liquid-cooled power module heat sink structure with grooved needle teeth provided in Example One is further optimized, as shown in Figure 9 Different designs in different directions can be made based on the structure of the heat dissipation teeth 15, such as different layer designs. The staggered arrangement of the heat dissipation teeth 15 can optimize the heat transfer path, significantly improve the heat dissipation efficiency in the near heat source area, achieve balanced overall temperature distribution, and enhance system reliability.

[0058] Working principle: The heat transfer cooling liquid is injected between the heat dissipation base plate 1 and the water jacket 2 through the inlet pipe 13, and absorbs the heat conducted by the heat dissipation teeth 15. When the heat transfer cooling liquid flows through the heat dissipation teeth 15, the grooves on the multiple surfaces of the heat dissipation teeth 15 increase the heat exchange area and disrupt the flow trajectory of the heat transfer cooling liquid, causing turbulent flow, stirring the boundary layer between the heat dissipation teeth 15 and the heat transfer cooling liquid, reducing the thermal resistance, increasing the surface heat exchange area and turbulence, thereby improving the heat exchange performance and reducing the chip temperature. At the same time, the groove tooth structure of the heat dissipation teeth 15 can break the trailing vortex, reduce the flow resistance, and increase the distance between the heat dissipation teeth 15, reducing the risk of blockage. The heat transfer cooling liquid is injected through the flow inlet pipe 301, flows through the internal flow channel of the water jacket 2, and is discharged through the flow outlet pipe 16. The heat transfer cooling liquid absorbs and carries away the heat transferred out while flowing. When the heat transferred out by the heat dissipation base plate 1 increases and the temperature rises, the installation sleeve 302 is in contact with the heat dissipation base plate 1, and through the thermal expansion and contraction effect, the gas inside the installation sleeve 302 expands and pushes the piston 303 to slide outward. The connecting rod 304 pushes the sliding tooth rod 305 to slide on the flow inlet pipe 301. Since the teeth of the sliding tooth rod 305 are engaged with the gear 308, the sliding tooth rod 305 moves and engages the rotating gear 308 and the shaft 306, thereby rotating the adjusting guide plate 307 inward to close and reduce the flow diameter, increase the flow rate of the heat transfer cooling liquid, and increase the heat exchange efficiency. When the temperature decreases, the piston 303 drives the sliding tooth rod 305 to reset, the flow channel diameter increases, the flow rate of the heat transfer cooling liquid decreases, and the flow rate adjusting module 3 can automatically adjust the flow rate of the heat transfer cooling liquid according to different temperatures, thereby adjusting the heat exchange efficiency and realizing dynamic matching of the heat exchange efficiency and the temperature.

[0059] The above is only a preferred embodiment of the present application, but the protection scope of the present application is not limited thereto. Any skilled person in the art can make equivalent replacements or changes within the technical scope disclosed by the present application according to the technical solution and inventive concept of the present application, which should be covered within the protection scope of the present application.

Claims

1. A liquid-cooled power module heat sink structure with grooved pin teeth, characterized in that: It includes a heat dissipation substrate (1); Heat dissipation teeth (15), a plurality of heat dissipation teeth (15) are fixedly connected to the bottom of the heat dissipation substrate (1) at equal distances; A water jacket (2), the water jacket (2) being fixedly connected to the bottom of the heat dissipation substrate (1); a flow outlet pipe (16), wherein the flow outlet pipe (16) is fixedly connected to one side of the water jacket (2); A flow rate regulating module (3) is provided on the water jacket (2), the flow rate regulating module (3) comprising a flow inlet pipe (301), the flow inlet pipe (301) being fixedly connected to a side of the water jacket (2) away from the flow outlet pipe (16), the flow inlet pipe (301) being provided with two mounting holes, a rotating shaft (306) being rotatably connected in both mounting holes, and an adjusting guide plate (307) being fixedly connected to the outside of both rotating shafts (306), the flow rate regulating module (3) regulating the flow rate of the heat exchange coolant according to the temperature of the heat dissipation substrate (1), thereby changing the heat exchange efficiency.

2. The liquid-cooled power module heat sink structure with grooved pin teeth according to claim 1, characterized in that: The plurality of heat dissipation teeth (15) are all diamond-shaped teeth, and grooves are formed on the plurality of surfaces of the plurality of heat dissipation teeth (15).

3. The liquid-cooled power module heat sink structure with grooved pin teeth according to claim 2, characterized in that: A plurality of flow channels are provided at equal intervals inside the water jacket (2), and two corresponding fixing holes are provided on the water jacket (2), wherein a liquid inlet pipe (13) and a liquid outlet pipe (14) are fixedly connected to the two fixing holes respectively.

4. The liquid-cooled power module heat sink structure with grooved pin teeth according to claim 3, characterized in that: A connection layer (4) is provided above the heat dissipation substrate (1), a metal connection layer (5) is provided above the connection layer (4), an insulating substrate (6) is provided above the metal connection layer (5), and a conductive metal layer (7) is provided above the insulating substrate (6).

5. The liquid-cooled power module heat sink structure with grooved pin teeth according to claim 4, characterized in that: A plurality of connection layers (8) are provided on the top of the conductive metal layer (7), wherein power chips (9) are provided above the plurality of connection layers (8), connection layers (10) are provided above the plurality of power chips (9), and a conductive metal part (11) is provided above one connection layer (8) located on one side of the plurality of power chips (9), and the bottom of one end of the conductive metal part (11) away from the connection layer (8) is fixedly connected to the top of the plurality of connection layers (10).

6. The liquid-cooled power module heat sink structure with grooved pin teeth according to claim 5, characterized in that: A plurality of lead frames (12) are provided above the two second connection layers (8) located on both sides.

7. The liquid-cooled power module heat sink structure with grooved pin teeth according to claim 1, characterized in that: The flow rate regulating module (3) further comprises a mounting sleeve (302), a mounting groove is provided on the top of the water jacket (2), the mounting sleeve (302) is fixedly connected in the mounting groove, and the top of the mounting sleeve (302) contacts the bottom of the heat dissipation substrate (1).

8. The liquid-cooled power module heat sink structure with grooved pin teeth according to claim 7, characterized in that: The inner wall of the mounting sleeve (302) is slidably connected to a piston member (303), and one side of the piston member (303) is fixedly connected to a connecting rod member (304).

9. The liquid-cooled power module heat sink structure with grooved pin teeth according to claim 8, characterized in that: The top of the flow inlet pipe (301) is slidably connected to a sliding gear rod (305), and the bottom of one end of the connecting rod (304) away from the piston (303) is fixedly connected to the top of the sliding gear rod (305).

10. The liquid-cooled power module heat sink structure with grooved pin teeth according to claim 9, characterized in that: The upper ends of the two rotating shafts (306) are fixedly connected with gears (308), and the two gears (308) are meshed with the sliding gear rod (305).

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