Liquid cooling heat dissipation device and vehicle power distribution box

Abstract

The utility model relates to power distribution box heat dissipation technical field especially discloses a liquid cooling heat dissipation device and vehicle power distribution box, and liquid cooling heat dissipation device includes shell body, inner casing, water inlet pipe and water outlet pipe, and the cooling cavity is formed in the shell body, and the surface of shell body is equipped with water inlet and water outlet at intervals, and water inlet and water outlet are linked together, and the inner casing is located in the cooling cavity, and with the cavity inner wall of cooling cavity forms flowing space, to supply cooling liquid to flow, and the mounting cavity is formed in the inner casing, and the mounting cavity is used to accommodate the electrification terminal, and one end of water inlet pipe is linked together with water inlet, and the other end is used to be connected with external liquid storage device, and one end of water outlet pipe is linked together with water outlet, and the other end is used to be connected with external liquid storage device, and need not open the heat dissipation hole on the surface of vehicle power distribution box, ensure the sealing of vehicle power distribution box itself, thereby improved the working life of the internal structure of vehicle power distribution box.

Description

Technical Field

[0001] This utility model relates to the field of heat dissipation technology for power distribution boxes, and in particular to a liquid cooling heat dissipation device and a vehicle power distribution box. Background Technology

[0002] When the vehicle's electrical distribution box is in operation, the internal power terminals will generate a lot of heat due to their own current, so a heat dissipation structure is needed to dissipate heat from the power terminals.

[0003] Existing automotive power distribution boxes typically use air cooling to dissipate heat from the energized terminals. This is achieved by creating ventilation holes on the surface of the box, allowing air convection to carry away heat from the terminals. However, automotive power distribution boxes usually require a certain level of sealing. Therefore, when using air cooling, the ventilation holes on the surface of the box can easily compromise its seal, leading to potential damage to the internal structure. Utility Model Content

[0004] The main purpose of this utility model is to propose a liquid cooling heat dissipation device, which aims to solve the problem that when existing vehicle power distribution boxes use air cooling to dissipate heat from the power-conducting terminals, the sealing of the vehicle power distribution box itself is easily damaged, thus causing damage to the internal structure of the vehicle power distribution box.

[0005] To solve the above problems, this utility model proposes a liquid cooling heat dissipation device, comprising:

[0006] The outer casing has a cooling cavity formed inside it, and the surface of the outer casing is provided with a water inlet and a water outlet spaced apart, and the water inlet and the water outlet are connected to each other;

[0007] An inner housing is disposed in the cooling cavity and forms a flow space with the inner wall of the cooling cavity for the flow of coolant. An installation cavity is formed inside the inner housing for accommodating power-conducting terminals.

[0008] In one embodiment, the liquid cooling heat dissipation device further includes an inlet pipe and an outlet pipe, one end of which is connected to the inlet and the outlet respectively, and the other end of which is used to connect to an external liquid storage device.

[0009] In one embodiment, the water inlet is located at the top of the outer casing, and the water outlet is located on the periphery of the outer casing;

[0010] And / or, the inner contour of the inner housing is arranged in a gourd shape and is adapted to the outer contour of the power-on terminal.

[0011] In one embodiment, the outer peripheral side of the inner housing in the axial direction is provided with a recessed portion, which is used to engage with a power terminal.

[0012] In one embodiment, the liquid cooling heat dissipation device further includes a connector through which both the inlet pipe and the outlet pipe pass to fix the inlet pipe and the outlet pipe.

[0013] In one embodiment, the liquid cooling heat dissipation device further includes a first extension and a second extension. The first extension protrudes from the opening edge of the water inlet and is connected to one end of the water inlet pipe. The second extension protrudes from the opening edge of the water outlet and is connected to one end of the water outlet pipe.

[0014] In one embodiment, the liquid cooling heat dissipation device further includes a mounting plate, which is connected to the bottom periphery of the housing.

[0015] In one embodiment, the surface of the mounting plate is provided with a plurality of through holes spaced apart, and the plurality of through holes are used to thread the liquid cooling heat dissipation device to the main body of the power distribution box.

[0016] This utility model also proposes a vehicle power distribution box, including a power distribution box body and a liquid cooling heat dissipation device. The liquid cooling heat dissipation device is the liquid cooling heat dissipation device described above. The liquid cooling heat dissipation device is located inside the power distribution box body and covers the power-conducting terminals inside the power distribution box body.

[0017] In one embodiment, the vehicle power distribution box includes multiple liquid cooling heat dissipation devices. The main body of the power distribution box has multiple power terminals. One of the liquid cooling heat dissipation devices is mounted on one of the power terminals of the main body of the power distribution box, and the multiple liquid cooling heat dissipation devices are connected in series through multiple water pipes to form a series structure.

[0018] This utility model proposes a liquid cooling heat dissipation device, including an outer shell and an inner shell. When heat dissipation is required for the energized terminals, external coolant is introduced into the cooling chamber of the outer shell through the inlet and flows in the flow space formed by the inner wall of the cooling chamber and the inner shell, thereby carrying away the heat of the energized terminals located in the mounting cavity of the inner shell, thus completing the heat dissipation. There is no need to open heat dissipation holes on the surface of the vehicle power distribution box, ensuring the sealing of the vehicle power distribution box itself, thereby improving the service life of the internal structure of the vehicle power distribution box. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0020] Figure 1 This is a schematic diagram of the structure of an embodiment of the liquid cooling heat dissipation device of this utility model;

[0021] Figure 2 for Figure 1 A structural diagram of part of the embodiment;

[0022] Figure 3 for Figure 2 A cross-sectional view of the Chinese embodiment.

[0023] Explanation of icon numbers:

[0024] 100. Liquid cooling heat dissipation device; 10. Outer shell; 11. Cooling chamber; 12. Water inlet; 13. Water outlet; 20. Inner shell; 21. Mounting cavity; 30. Water inlet pipe; 40. Water outlet pipe; 50. Connector; 60. First extension; 70. Second extension; 80. Mounting plate; 81. Through hole.

[0025] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0026] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0027] If the present utility model involves directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a certain posture (as shown in the figure). If the specific posture changes, the directional indicators will also change accordingly.

[0028] Furthermore, if the embodiments of this utility model involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of indicated technical features. Therefore, features defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. If the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0029] like Figures 1 to 3 In one embodiment, the liquid cooling heat dissipation device 100 includes an outer shell 10, an inner shell 20, a water inlet pipe 30, and a water outlet pipe 40. A cooling cavity 11 is formed inside the outer shell 10. A water inlet 12 and a water outlet 13 are spaced apart on the surface of the outer shell 10 and are connected to each other. The inner shell 20 is disposed in the cooling cavity 11 and forms a flow space with the inner wall of the cooling cavity 11 for the flow of coolant. An installation cavity 21 is formed inside the inner shell 20 for accommodating electrical terminals.

[0030] In this embodiment, the outer casing 10 serves to protect the internal components and create a cooling space. It is typically made of a material with sufficient strength and corrosion resistance, such as a metal alloy or high-strength plastic. The outer casing 10 has a hollow interior, forming a cooling chamber 11. This cooling chamber 11 provides space for the installation of the inner casing 20 and the flow of coolant. The surface of the outer casing 10 has an inlet 12 and an outlet 13, serving as channels for coolant to enter and exit the cooling chamber 11. These two outlets are connected through the internal space of the cooling chamber 11, allowing the coolant to circulate within it. The inner casing 20 is located within the cooling chamber 11, forming a flow space between itself and the inner wall of the cooling chamber 11 for coolant flow. The inner casing 20 itself has an internal mounting cavity 21 to accommodate the electrical terminals that require heat dissipation. These terminals generate heat during operation, which is promptly dissipated by the inner casing 20 and the surrounding coolant circulation system. The inner casing 20 is typically made of a material with good thermal conductivity, such as aluminum or copper, to effectively transfer the heat generated by the electrical terminals to the coolant.

[0031] The liquid cooling heat dissipation device 100 proposed in this utility model includes an outer shell 10 and an inner shell 20. When it is necessary to dissipate heat from the energized terminals, the external coolant is introduced into the cooling cavity 11 of the outer shell 10 through the water inlet 12, and flows in the flow space formed by the inner wall of the cooling cavity 11 and the inner shell 20, thereby carrying away the heat of the energized terminals located in the mounting cavity 21 of the inner shell 20, thus completing the heat dissipation. There is no need to open heat dissipation holes on the surface of the vehicle power distribution box, ensuring the sealing of the vehicle power distribution box itself, thereby improving the working life of the internal structure of the vehicle power distribution box.

[0032] like Figures 1 to 3 In one embodiment, the liquid cooling heat dissipation device 100 further includes an inlet pipe 30 and an outlet pipe 40. One end of the inlet pipe 30 and the outlet pipe 40 are respectively connected to the inlet 12 and the outlet 13, and the other end is used to connect to an external liquid storage device.

[0033] In this embodiment, the inlet pipe 30 and the outlet pipe 40 serve as a bridge connecting the liquid cooling heat dissipation device 100 and the external liquid storage device. One end of the inlet pipe 30 is connected to the inlet port 12 on the outer casing 10, and the other end is connected to the external liquid storage device. Its function is to introduce the coolant from the external liquid storage device into the cooling chamber 11. Conversely, the outlet pipe 40 is connected to the outlet port 13 at one end and the other end is connected to the external liquid storage device. It is used to return the coolant, which has increased in temperature after heat exchange, to the external liquid storage device for cooling or circulation. These two pipes are typically made of flexible and corrosion-resistant materials, such as PRP pipes, to ensure smooth coolant delivery and long-term stable operation.

[0034] like Figures 1 to 3 In one embodiment, the water inlet 12 is located at the top of the outer casing 10, and the water outlet 13 is located on the periphery of the outer casing 10.

[0035] And / or, the inner contour of the inner housing 20 is arranged in a gourd shape and is adapted to the outer contour of the power-on terminal.

[0036] In this embodiment, the inlet 12 is located at the top of the outer casing 10, allowing the coolant to enter the cooling chamber 11 from the top and fall naturally under gravity, which helps the coolant to form a more uniform flow distribution within the cooling chamber 11. The outlet 13 is located on the periphery of the outer casing 10, usually at a lower position on the side. This layout ensures that the coolant flows fully within the cooling chamber 11 and completes heat exchange before being smoothly discharged from the side, avoiding dead zones where the coolant stagnates within the chamber and improving heat dissipation efficiency.

[0037] With or without the above embodiments, the inner contour of the inner housing 20 is designed in a gourd shape. This shape allows for optimal adaptation to the outer contour of the energized terminal, ensuring that the cavity wall of the mounting cavity 21 fits snugly against the outer surface of the energized terminal. This reduces the gap between the inner housing 20 and the energized terminal, thereby more effectively transferring heat from the energized terminal to the inner housing 20, where it is then carried away by the coolant. If the energized terminal is cylindrical in other embodiments, the inner contour of the inner housing 20 can also be cylindrical; this is not a limitation.

[0038] In other embodiments, the distance between the top wall of the cooling cavity 11 and the top of the inner shell 20 is L, where 5mm≤L≤8mm.

[0039] If L is too small, the flow of coolant will be restricted, creating significant flow resistance. This prevents the coolant from fully absorbing the heat transferred from the inner shell 20, resulting in reduced cooling efficiency. If L is too large, the top space of the cooling chamber 11 will be too large, making the coolant flow path within the chamber less compact, reducing heat exchange efficiency, and increasing the overall size and cost of the liquid cooling device 100. Therefore, a value of 5mm ≤ L ≤ 8mm is set. For example, L can be 5mm, 6mm, or 7mm. This allows the coolant to flow at a reasonable velocity and flow rate, ensuring sufficient contact with the top of the inner shell 20, guaranteeing good heat dissipation of the liquid cooling device 100, while reducing manufacturing costs. Simultaneously, the circumferential gap D between the cooling chamber 11 and the inner shell 20 can be 3mm ≤ D ≤ 8mm.

[0040] like Figures 1 to 3 In one embodiment, the outer peripheral side of the inner housing 20 in the axial direction is provided with a recess 22, which is used to engage with the power terminal.

[0041] In this embodiment, the middle section of the inner housing 20 in the axial direction is recessed inward, thereby forming a recessed portion 22 on the outer peripheral side, thus forming a snap-fit ​​structure in the mounting cavity 21 and snapping it with the power terminal, which enhances the connection stability between the two and further ensures the heat dissipation effect.

[0042] like Figures 1 to 3 In one embodiment, the liquid cooling heat dissipation device 100 further includes a connector 50, through which both the inlet pipe 30 and the outlet pipe 40 pass to fix the inlet pipe 30 and the outlet pipe 40.

[0043] In this embodiment, the connector 50 is used to fix the inlet pipe 30 and the outlet pipe 40. Its material can be engineering plastic or metal alloy to give it high strength and corrosion resistance. Specifically, the connector 50 is a plate-shaped structure with two through holes 81 spaced apart on its surface. The size of the through holes 81 matches the outer diameter of the inlet pipe 30 and the outlet pipe 40, so that the two pipes can pass through tightly. After the inlet pipe 30 and the outlet pipe 40 pass through the two through holes 81, the inlet pipe 30 and the outlet pipe 40 are fixed by threaded connection or snap-fit, etc., to achieve a stable connection between the inlet pipe 30 and the outlet pipe 40 and the connector 50. This effectively prevents the inlet pipe 30 and the outlet pipe 40 from displacing, shaking or even falling off under the pressure generated by the flow of coolant, and ensures that the coolant can flow stably along the predetermined path, thereby improving the reliability of the entire liquid cooling system.

[0044] like Figures 1 to 3In one embodiment, the liquid cooling heat dissipation device 100 further includes a first extension 60 and a second extension 70. The first extension 60 protrudes from the opening edge of the water inlet 12 and is connected to one end of the water inlet pipe 30. The second extension 70 protrudes from the opening edge of the water outlet 13 and is connected to one end of the water outlet pipe 40.

[0045] In this embodiment, the first extension 60 and the second extension 70 are connected to the outer casing 10 by welding or integral design, ensuring the structural stability and sealing of both parts with the casing. Both the first extension 60 and the second extension 70 are columnar structures with through holes 81 along the axial direction, and are connected to the inlet 12 and the outlet 13, ensuring smooth flow of coolant. The first extension 60 and the second extension 70 can be connected to the inlet pipe and the outlet pipe 40 by quick-connect fitting, threaded connection, or other methods, improving the ease of connection between the inlet pipe and the outlet pipe 40 and the outer casing 10 while ensuring sealing, further improving the cooling effect.

[0046] In other embodiments, both the first extension 60 and the second extension 70 are threaded on their outer peripheral sides, and are threadedly connected to one end of the inlet pipe 30 and the outlet pipe 40, respectively. By creating threads on their outer peripheral sides, the first extension 60 and the second extension 70 achieve threaded connections with the inlet and outlet pipes 40, ensuring stable connections and forming a reliable seal between the inlet and outlet pipes 40 and the outer casing 10. This effectively prevents coolant leakage and further improves the cooling effect of the liquid cooling device 100. Furthermore, the threaded connection method is simple to operate, requiring no special tools for installation and disassembly, further improving the installation flexibility of the liquid cooling device 100.

[0047] like Figures 1 to 3 In one embodiment, the liquid cooling heat dissipation device 100 further includes a mounting plate 80, which is connected to the bottom periphery of the housing 10.

[0048] In this embodiment, the mounting plate 80 is a rectangular structure that is welded to the outer periphery of the bottom of the outer casing 10, thereby increasing the contact area between the liquid cooling heat dissipation device 100 and the external structure. This allows the liquid cooling heat dissipation device 100 to have sufficient space to be connected and fixed to the external structure. The fixing method can be snap-fit ​​or threaded connection to ensure the installation stability of the liquid cooling heat dissipation device 100.

[0049] like Figures 1 to 3 Furthermore, the surface of the mounting plate 80 is provided with a plurality of through holes 81 spaced apart, which are used to thread the liquid cooling heat dissipation device 100 to the main body of the power distribution box.

[0050] In this embodiment, the mounting plate 80 has multiple threaded holes evenly distributed on its surface, thereby achieving a threaded connection between the liquid cooling heat dissipation device 100 and the main body of the distribution box. This allows the liquid cooling heat dissipation device 100 to be stably installed on the main body of the distribution box, providing heat dissipation protection for heat-generating components such as the power terminals inside the distribution box, ensuring the normal operation of the distribution box. Furthermore, the threaded connection method is simple and quick, requiring no complex operations, further improving the installation efficiency of the liquid cooling heat dissipation device 100.

[0051] This utility model also proposes a vehicle power distribution box, which includes a power distribution box body and a liquid cooling heat dissipation device 100. The liquid cooling heat dissipation device is located inside the power distribution box body and covers the power-conducting terminals inside the power distribution box body. The specific structure of the liquid cooling heat dissipation device 100 is as described in the above embodiments. Since the liquid cooling heat dissipation device 100 adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be described in detail here.

[0052] like Figure 1 In one embodiment, the vehicle power distribution box includes multiple liquid cooling heat dissipation devices 100, the main body of the power distribution box has multiple power terminals, a liquid cooling heat dissipation device 100 is mounted on a power terminal of the main body of the power distribution box, and the multiple liquid cooling heat dissipation devices 100 are connected in series through multiple water supply pipes to form a series structure.

[0053] In this embodiment, the specific number of liquid cooling heat dissipation devices 100 is determined according to the number of power-on terminals to ensure that each power-on terminal can be cooled. At the same time, multiple liquid cooling heat dissipation devices 100 are connected in series through water supply pipes. For example, when the vehicle power distribution box has two liquid cooling heat dissipation devices 100, the water inlet pipe 30 is connected to the water inlet 12 of one liquid cooling heat dissipation device 100, and the water outlet pipe 40 is connected to the water outlet 13 of the other liquid cooling heat dissipation device 100. Meanwhile, the water outlet 13 of one liquid cooling heat dissipation device 100 is connected to the water inlet 12 of the other liquid cooling heat dissipation device 100 through water supply pipes, thereby forming a series structure. This allows multiple liquid cooling heat dissipation devices 100 to be equipped with only one external liquid storage device, reducing the number of components and thus reducing system costs.

[0054] The above description is merely an exemplary embodiment of the present utility model and does not limit the patent scope of the present utility model. Any equivalent structural transformations made based on the technical concept of the present utility model and the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present utility model.

Claims

1. A liquid cooling heat dissipation device, characterized in that, The liquid cooling heat dissipation device includes: The outer casing has a cooling cavity formed inside it, and the surface of the outer casing is provided with a water inlet and a water outlet spaced apart, and the water inlet and the water outlet are connected to each other; An inner housing is disposed in the cooling cavity and forms a flow space with the inner wall of the cooling cavity for the flow of coolant. An installation cavity is formed inside the inner housing for accommodating power-conducting terminals.

2. The liquid cooling heat dissipation device as described in claim 1, characterized in that, The liquid cooling heat dissipation device also includes an inlet pipe and an outlet pipe. One end of the inlet pipe and the outlet pipe are respectively connected to the inlet and the outlet, and the other end of each is used to connect to an external liquid storage device.

3. The liquid cooling heat dissipation device as described in claim 1, characterized in that, The water inlet is located at the top of the outer casing, and the water outlet is located on the periphery of the outer casing; And / or, the inner contour of the inner housing is arranged in a gourd shape and is adapted to the outer contour of the power-on terminal.

4. The liquid cooling heat dissipation device as described in claim 1, characterized in that, The outer periphery of the inner housing in the axial direction is provided with a recessed portion, which is used to engage with the power terminal.

5. The liquid cooling heat dissipation device as described in claim 2, characterized in that, The liquid cooling heat dissipation device also includes a connector, through which both the inlet pipe and the outlet pipe pass to fix them in place.

6. The liquid cooling heat dissipation device as described in claim 5, characterized in that, The liquid cooling heat dissipation device further includes a first extension and a second extension. The first extension protrudes from the opening edge of the water inlet and is connected to one end of the water inlet pipe. The second extension protrudes from the opening edge of the water outlet and is connected to one end of the water outlet pipe.

7. The liquid cooling heat dissipation device as described in any one of claims 1 to 4, characterized in that, The liquid cooling heat dissipation device also includes a mounting plate, which is connected to the bottom periphery of the outer casing and is used to fix the liquid cooling heat dissipation device to the main body of the power distribution box.

8. The liquid cooling heat dissipation device as described in claim 7, characterized in that, The surface of the mounting plate is provided with a plurality of through holes spaced apart, which are used to thread the liquid cooling heat dissipation device to the main body of the power distribution box.

9. A vehicle power distribution box, characterized in that, The vehicle power distribution box includes a power distribution box body and a liquid cooling heat dissipation device. The liquid cooling heat dissipation device is the liquid cooling heat dissipation device as described in any one of claims 1 to 8. The liquid cooling heat dissipation device is located inside the power distribution box body and covers the power-conducting terminals inside the power distribution box body.

10. The vehicle power distribution box as described in claim 9, characterized in that, The vehicle power distribution box includes multiple liquid cooling heat dissipation devices. The main body of the power distribution box has multiple power terminals. One of the liquid cooling heat dissipation devices is mounted on one of the power terminals of the main body of the power distribution box, and the multiple liquid cooling heat dissipation devices are connected in series through multiple water pipes to form a series structure.

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