Liquid cooling radiator and power conversion device
By employing a combination structure of shell, heat conductor, sealing ring, drain groove, and through hole in the liquid cooler, the problem of easy leakage in liquid coolers is solved, achieving efficient sealing and low-cost heat dissipation, and it is suitable for various liquid coolers.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- HUAWEI TECH CO LTD
- Filing Date
- 2025-04-15
- Publication Date
- 2026-06-23
AI Technical Summary
Existing liquid-cooled radiators are prone to leakage due to gaps between material components, which can lead to coolant leakage and damage to heat-generating components.
A liquid-cooled radiator was designed, which adopts a combination structure of shell, heat conductor, first sealing ring and second sealing ring. The design of drainage groove and through hole achieves the sealing between shell and heat conductor, reducing the probability of coolant leakage. The cooperation between drainage groove and through hole prevents coolant from directly contacting the sealing ring, thus improving the sealing effect.
It effectively reduces the risk of coolant leakage, improves the reliability of heating elements and sealing rings, reduces processing costs, and supports lightweight and miniaturized designs.
Smart Images
Figure CN224401888U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of liquid cooling technology, and in particular to a liquid cooling radiator and power conversion device. Background Technology
[0002] Liquid cooling radiators are widely used due to their superior heat dissipation performance. Existing liquid cooling radiators reduce manufacturing costs by assembling components made of two materials (e.g., aluminum alloy and copper). However, gaps exist between these two materials, making liquid cooling radiators prone to leakage. Utility Model Content
[0003] This application provides a liquid-cooled radiator and a power conversion device, which aims to solve the problem of liquid leakage risk in liquid-cooled radiators.
[0004] In a first aspect, embodiments of this application provide a liquid-cooled heat sink, which includes a housing, a heat conductor, a first sealing ring, and a second sealing ring. The housing includes a fluid cavity, a mounting opening, a drain groove, and a through hole. The mounting opening is located on one side of the housing in the thickness direction and communicates with the fluid cavity. The drain groove is located on the side of the housing with the mounting opening and surrounds the mounting opening, and is spaced apart from the fluid cavity. The through hole penetrates the housing along the thickness direction and communicates with the drain groove. The first sealing ring is located between the drain groove and the mounting opening and surrounds the mounting opening. The second sealing ring surrounds the drain groove. The heat conductor contacts the housing and covers the drain groove, the through hole, and the mounting opening, and abuts against the first and second sealing rings.
[0005] In the liquid-cooled heat sink provided in this application embodiment, coolant flows in the fluid cavity, and the heat conductor can exchange heat with the heat-generating device. The heat generated by the heat-generating device can be transferred to the coolant in the fluid cavity through the heat conductor, and then transferred to the external environment through the coolant, thereby achieving heat dissipation for the heat-generating device. The design of the first sealing ring and the second sealing ring can achieve a seal between the shell and the heat conductor, which helps to reduce the probability of coolant flowing into the external environment from the installation opening through the gap between the heat conductor and the shell, which helps to reduce the risk of leakage, reduces the risk of damage to the heat-generating device due to contact between the coolant and the heat-generating device, and improves the reliability of the heat-generating device.
[0006] Furthermore, in the event of failure of the first sealing ring, the coolant will flow from the first sealing ring to the second sealing ring. The design of the drain channel and through hole ensures that the coolant flows into the drain channel and then out of the liquid-cooled radiator through the through hole during its flow to the second sealing ring. This avoids contact between the coolant and the second sealing ring, which improves the reliability and sealing effect of the second sealing ring, reduces the risk of leakage, and enhances the reliability of heat-generating components. Moreover, it eliminates the need for additional designs for the first and second sealing rings; only the drain channel and through hole need to be created in the housing. This simplifies the design, making it widely applicable and versatile, suitable for various liquid-cooled radiators. Additionally, it reduces manufacturing costs. The design of the through hole being spaced apart from the fluid cavity prevents coolant in the fluid cavity from directly flowing into the drain channel through the through hole and contacting the second sealing ring, thus preventing its failure. This further improves the reliability and sealing effect of the second sealing ring and reduces the risk of leakage.
[0007] In one possible implementation, the thermal conductivity of the heat conductor is greater than that of the housing. Because the thermal conductivity of the heat conductor is greater than that of the housing, the heat generated by the heat-generating device can be transferred to the coolant in the fluid cavity more quickly, which is beneficial to improving the heat dissipation efficiency of the heat-generating device. Moreover, compared to increasing the overall thermal conductivity of the liquid cooler, only the thermal conductivity of the heat conductor needs to be increased, which helps to reduce processing costs and facilitates the lightweight design of the liquid cooler.
[0008] In one possible implementation, the drain channel includes a first channel wall, which is disposed opposite to the opening of the drain channel, and the area of the opening of the drain channel projected along the thickness direction of the shell is greater than the area of the first channel wall projected along the thickness direction of the shell.
[0009] This approach allows for an increase in the size of the bleed groove opening, which in turn increases the flow rate of coolant flowing towards the second sealing ring into the bleed groove. This improves the bleed efficiency of the coolant, enhances the bleed effect of the bleed groove, reduces the risk of coolant contact with the second sealing ring, and improves the reliability of the second sealing ring.
[0010] In one possible implementation, the drain channel includes a second channel wall fixedly connected to the first channel wall, the second channel wall facing the second sealing ring and inclined relative to the first channel wall along the width direction of the drain channel toward the first sealing ring, and the second channel wall in contact with the heat conductor.
[0011] In this way, the second tank wall can guide the coolant flowing into the drain tank, which helps to increase the flow rate of the coolant flowing towards the second sealing ring into the drain tank, improves the drainage effect of the drain tank, reduces the risk of coolant contacting the second sealing ring, and improves the reliability of the second sealing ring.
[0012] In one possible implementation, the overflow channel further includes a connecting channel wall, which is fixedly connected between the second channel wall and the first channel wall, and the connecting channel wall is perpendicular to the first channel wall.
[0013] With the second tank wall fixedly connected to the first tank wall, the angle of inclination between the second and first tank walls is positively correlated with the size of the drain channel opening. The larger the angle of inclination between the second and first tank walls, the larger the size of the drain channel opening. The design of the second tank wall being fixedly connected to the first tank wall ensures a large angle of inclination between them, thereby guaranteeing a high flow rate of coolant into the drain channel. Simultaneously, it helps to reduce the size of the drain channel opening, shorten the distance between the first and second sealing rings, improve space utilization, and facilitate the miniaturization design of the liquid-cooled radiator.
[0014] In one possible implementation, the width of the overflow channel gradually decreases in the direction from the opening of the overflow channel toward the first channel wall.
[0015] In this way, the flow velocity of the coolant at the bottom of the drain channel will be greater than that at the opening of the drain channel, so that the coolant can flow out of the drain channel to the outside of the liquid-cooled radiator more quickly. This is beneficial to improving the drainage efficiency of the coolant, improving the drainage effect of the drain channel, reducing the risk of coolant contact with the second sealing ring, and improving the reliability of the second sealing ring.
[0016] In one possible implementation, the minimum distance between the effluent groove and the first sealing ring is less than the minimum distance between the effluent groove and the second sealing ring in the width direction of the effluent groove.
[0017] This helps to shorten the distance between the drain groove and the first sealing ring, allowing the coolant to flow into the drain groove more quickly. This improves the drainage efficiency of the coolant, enhances the drainage effect of the drain groove, reduces the risk of coolant contact with the second sealing ring, and improves the reliability of the second sealing ring.
[0018] In one possible implementation, the dimension of the drain channel in the thickness direction of the housing is smaller than the dimension of the heat conductor in the thickness direction of the housing.
[0019] In this way, while ensuring that the drainage channel has a good drainage effect, it is beneficial to reduce the size of the drainage channel in the thickness direction of the shell, which is beneficial to improving the structural stability and reliability of the shell, and thus to improving the structural stability and reliability of the liquid cooling radiator.
[0020] In one possible implementation, the housing has a mounting groove communicating with the mounting opening on one side in the thickness direction. The mounting groove includes a bottom wall disposed opposite to the opening of the mounting groove, and the heat conductor is housed in the mounting groove and fixedly stacked with the bottom wall of the mounting groove.
[0021] This design improves the space utilization between the casing and the heat conductor, facilitating the miniaturization of liquid-cooled radiators. Furthermore, the larger contact area between the heat conductor and the casing enhances the connection strength, thereby improving the structural stability and reliability of the liquid-cooled radiator.
[0022] In one possible implementation, in the housing and the heat conductor, one of them has a receiving groove on one side in the thickness direction of the housing, and the other covers the receiving groove. The receiving groove surrounds the mounting opening and is used to receive a first sealing ring or a second sealing ring.
[0023] In this way, the receiving groove can serve to position the first and second sealing rings for installation, facilitating the placement of the sealing rings (including the first and second sealing rings) in the liquid-cooled radiator and reducing the processing cost of the liquid-cooled radiator. Moreover, the design of the receiving groove helps to improve space utilization and facilitates the miniaturization design of the liquid-cooled radiator.
[0024] In one possible implementation, the heat conductor has heat dissipation teeth on the side facing the mounting opening, and the heat dissipation teeth are housed in the fluid cavity.
[0025] This increases the contact area between the heat conductor and the coolant in the fluid cavity, increases the efficiency of heat transfer from the heat-generating device to the coolant via the heat conductor, and improves the heat dissipation efficiency of the heat-generating device.
[0026] In one possible implementation, the housing includes a first plate and a second plate. The first plate and the second plate are opposite to and fixedly connected in the thickness direction of the housing. The material of the first plate is the same as that of the second plate.
[0027] In this way, the first and second plates can be fixedly connected to form a shell, which helps to reduce the processing difficulty and cost of the shell. In addition, the design that the first and second plates are made of the same material increases the strength of the fixed connection between them, which helps to improve the structural stability and reliability of the shell, and thus improves the structural stability and reliability of the liquid cooling radiator.
[0028] Secondly, embodiments of this application also provide a power conversion device. The power conversion device includes a liquid-cooled heat sink and a heating element as described in any of the first aspects, with the heating element contacting and disposed on the side of the heat conductor facing away from the mounting opening.
[0029] In one possible implementation, the projection of the heating element along the thickness direction of the housing overlaps with the projection of the mounting opening along the thickness direction of the housing.
[0030] In this way, the heat generated by the heating device can be transferred along the thickness of the shell to the coolant in the fluid cavity through the heat conductor, which helps to shorten the heat dissipation path and improve the heat dissipation efficiency of the heating device. Attached Figure Description
[0031] To more clearly illustrate the technical solutions in the embodiments of this application or the background art, the accompanying drawings used in the embodiments of this application or the background art will be described below.
[0032] Figure 1 This is a three-dimensional structural schematic diagram of a power conversion device provided in an embodiment of this application;
[0033] Figure 2 yes Figure 1 The diagram shows a cross-section of the power conversion device along line AA.
[0034] Figure 3 yes Figure 2 The power conversion device shown is a three-dimensional structural diagram omitting the circuit board;
[0035] Figure 4 yes Figure 3 An exploded three-dimensional structural diagram of the liquid-cooled heat sink of the power conversion device shown.
[0036] Figure 5 yes Figure 3 A three-dimensional structural schematic diagram of a portion of the power conversion device cut along line BB;
[0037] Figure 6 yes Figure 3 The power conversion device shown is a partial structural diagram from another angle, omitting the heating element, heat conductor, and fasteners.
[0038] Figure 7 yes Figure 3 A three-dimensional structural schematic diagram of the power conversion device shown, cut along the CC line;
[0039] Figure 8 yes Figure 2 An enlarged view of section VIII of the power conversion device shown;
[0040] Figure 9 This is a partial structural schematic diagram of another power conversion device provided in an embodiment of this application. Detailed Implementation
[0041] This application provides a liquid-cooled heat sink and a power conversion device. The liquid-cooled heat sink is applied to the power conversion device. The power conversion device is an electronic device used for power conversion (including voltage conversion and voltage transformation).
[0042] The embodiments of this application are described below with reference to the accompanying drawings.
[0043] Please see Figure 1 , Figure 2 and Figure 3 , Figure 1 This is a three-dimensional structural diagram of a power conversion device 1000 provided in an embodiment of this application. Figure 2 yes Figure 1 The diagram shows a cross-section of the power conversion device 1000 along line AA. Figure 3 yes Figure 2 The power conversion device 1000 shown is a three-dimensional structural diagram omitting the circuit board 300.
[0044] like Figure 1 , Figure 2 and Figure 3 As shown, the power conversion device 1000 can be an inverter, specifically a photovoltaic inverter. The power conversion device 1000 can be used to convert the direct current output from the photovoltaic module into alternating current to supply the power grid (or AC load). The power conversion device 1000 may include a liquid-cooled heat sink 100, a heat-generating device 200, and a circuit board 300. The heat-generating device 200 and the circuit board 300 are sequentially arranged on one side of the liquid-cooled heat sink 100. The heat-generating device 200 is electrically connected to the photovoltaic module and the power grid (or AC load) through the circuit board 300. The heat-generating device 200 is a power module or a combination of multiple power modules. The heat-generating device 200 is used to convert the direct current output from the photovoltaic module into alternating current to supply the power grid (or AC load). The heat generated by the heat-generating device 200 can be quickly transferred to the external environment through the liquid-cooled heat sink 100, achieving heat dissipation for the heat-generating device 200. In some other embodiments, the power conversion device 1000 may also include other heat-generating devices 200, such as resistors, capacitors, diodes or transistors, and other electronic devices that generate heat during operation.
[0045] In other embodiments, the power conversion device 1000 may also be a rectifier. The power conversion device 1000 can convert alternating current (AC) output from the power grid or AC power source into direct current (DC) to supply DC loads. The power conversion device 1000 may also be an energy storage device, and may further include a battery disposed on the side of the circuit board 300 facing or away from the heating device 200, which converts AC output from the power grid or AC power source into DC to store in the battery.
[0046] Please see Figure 4 , Figure 5 , Figure 6 and Figure 7 and combined Figure 2 and Figure 3 , Figure 4 yes Figure 3 An exploded three-dimensional structural diagram of the liquid-cooled heat sink 100 of the power conversion device 1000 shown. Figure 5 yes Figure 3 The diagram shows a partial three-dimensional structure of the power conversion device 1000 cut along line BB. Figure 6 yes Figure 3 The power conversion device 1000 shown is partially structurally schematic from another angle, omitting the heating element 200, heat conductor 20, and fastener 60. Figure 7 yes Figure 3 The diagram shows a three-dimensional structure of the power conversion device 1000 cut along line CC.
[0047] like Figure 2 , Figure 3 and Figure 4 As shown, the liquid-cooled radiator 100 includes a housing 10, a heat conductor 20, a first sealing ring 30, a second sealing ring 40, and a liquid-cooling connector 50. For ease of description, the three mutually perpendicular directions in this embodiment are defined sequentially as the first direction (X-axis direction in the figure), the second direction (Y-axis direction in the figure), and the third direction (Z-axis direction in the figure). In this embodiment, the thickness direction of the housing 10 is parallel to the third direction (Z-axis direction in the figure), the length direction of the housing 10 is parallel to the first direction (X-axis direction in the figure), and the width direction of the housing 10 is parallel to the second direction (Y-axis direction in the figure). In some other embodiments, the length direction of the housing 10 may also be parallel to the second direction (Y-axis direction in the figure), and the width direction of the housing 10 may be parallel to the first direction (X-axis direction in the figure).
[0048] like Figure 2 , Figure 5 and Figure 6As shown, the housing 10 includes a fluid cavity 11, a mounting opening 12, a drain groove 13, and a through hole 14. The mounting opening 12 is located on one side of the housing 10 in the thickness direction (i.e., one side of the housing 10 in the Z-axis direction) and communicates with the fluid cavity 11. The drain groove 13 is located on the side of the housing 10 where the mounting opening 12 is located and surrounds the mounting opening 12, and is spaced apart from the fluid cavity 11. The drain groove 13 is spaced apart from the mounting opening 12, and its opening 131 is located on the side of the housing 10 where the mounting opening 12 is located. The through hole 14 penetrates the housing 10 along the Z-axis direction (i.e., the thickness direction of the housing 10) and communicates with the drain groove 13. In the Z-axis direction, the through hole 14 is located on one side of the drain groove 13. The projection of the through hole 14 along the Z-axis direction lies within the projection of the drain groove 13 along the Z-axis direction. The through hole 14 is spaced apart from the fluid cavity 11.
[0049] like Figure 2 , Figure 3 and Figure 7 As shown, specifically, the fluid cavity 11 includes a first connecting section 111, a second connecting section 112, and a plurality of third connecting sections 113. In the Y-axis direction, the first connecting section 111 and the second connecting section 112 are opposite to each other and spaced apart. The plurality of third connecting sections 113 communicate between the first connecting section 111 and the second connecting section 112 and are sequentially spaced apart along the X-axis direction. The mounting opening 12 communicates with the third connecting sections 113. The projection of the mounting opening 12 along the Z-axis direction overlaps with the projection of the third connecting section 113 along the Z-axis direction. The drain channel 13 is located on one side of the first connecting section 111 in the Z-axis direction and is spaced apart from the first connecting section 111; it is also located on one side of the second connecting section 112 in the Z-axis direction and is spaced apart from the second connecting section 112. The installation includes multiple mounting openings 12, multiple drainage channels 13, and multiple through holes 14. Each mounting opening 12 corresponds to one third connecting section 113, one drainage channel 13, and multiple through holes 14. The mounting opening 12 communicates with the third connecting section 113, the drainage channel 13 surrounds the mounting opening 12 and is spaced apart from it, and the multiple through holes 14 communicate with the drainage channel 13 and are spaced apart around the mounting opening 12. In some other embodiments, the number of mounting openings 12, the number of drainage channels 13, and the number of through holes 14 may be one.
[0050] like Figure 2 , Figure 4 and Figure 6As shown, both the first sealing ring 30 and the second sealing ring 40 are disposed on the side of the housing 10 where the mounting opening 12 is provided. The first sealing ring 30 is located between the drain groove 13 and the mounting opening 12 and surrounds the mounting opening 12; wherein, the first sealing ring 30 is spaced apart from the drain groove 13 and the mounting opening 12. The second sealing ring 40 surrounds the drain groove 13; wherein, the second sealing ring 40 is spaced apart from the drain groove 13. Exemplarily, there are multiple first sealing rings 30 and multiple second sealing rings 40. Each mounting opening 12 corresponds to one first sealing ring 30 and one second sealing ring 40. In some other embodiments, the number of first sealing rings 30 and the number of second sealing rings 40 may also be one.
[0051] like Figure 2 , Figure 4 and Figure 5 As shown, in the Z-axis direction (i.e., the thickness direction of the housing 10), the heat conductor 20 is disposed on the side of the first sealing ring 30 and the second sealing ring 40 facing away from the housing 10. The heat conductor 20 contacts the housing 10 and covers the drain groove 13, the through hole 14, and the mounting opening 12, and abuts against the first sealing ring 30 and the second sealing ring 40, that is, the first sealing ring 30 and the second sealing ring 40 abut against the heat conductor 20 and the housing 10. The heat conductor 20 is fixedly connected to the housing 10. Specifically, the heat conductor 20 contacts and is fixedly stacked on the side of the housing 10 with the mounting opening 12. The projections of the drain groove 13, the through hole 14, and the mounting opening 12 along the Z-axis direction are all located within the projection of the heat conductor 20 along the Z-axis direction. In the Z-axis direction, the first sealing ring 30 and the second sealing ring 40 abut against the housing 10 and the heat conductor 20.
[0052] exist Figure 2 , Figure 4 and Figure 5 In the illustrated embodiment, the liquid-cooled radiator 100 further includes a fastener 60. The heat conductor 20 is fixedly connected to the housing 10 via the fastener 60. Specifically, the heat conductor 20 contacts and overlaps with the side of the housing 10 that has the mounting opening 12. The housing 10 also has a fixing hole 15 on the side facing the heat conductor 20 in the Z-axis direction. The fixing hole 15 extends along the Z-axis direction and is located on the side of the second sealing ring 40 facing away from the first sealing ring 30, and is spaced apart from the second sealing ring 40. The heat conductor 20 also has a corresponding fixing hole 21, which penetrates the heat conductor 20 along the Z-axis direction and communicates with the fixing hole 15. The fastener 60 is partially inserted into the fixing hole 15 and the corresponding fixing hole 21, and partially abuts against the side of the heat conductor 20 facing away from the housing 10 in the Z-axis direction. This reduces the difficulty of assembling the housing 10 and the heat conductor 20, and also reduces the processing cost of the liquid cooler 100. Furthermore, it facilitates the maintenance and replacement of the heat conductor 20 and the maintenance of the liquid cooler 100.
[0053] For example, there are multiple fixing holes 15, corresponding fixing holes 21, and fasteners 60. The fixing holes 15, corresponding fixing holes 21, and fasteners 60 correspond one-to-one, and the multiple fixing holes 15, multiple corresponding fixing holes 21, and multiple fasteners 60 are arranged at intervals around the second sealing ring 40. In some other embodiments, the fasteners 60 may also be omitted, and the heat conductor 20 may also be fixedly connected to the housing 10 by means including but not limited to welding or adhesive bonding.
[0054] The thermal conductivity of the heat conductor 20 is greater than that of the housing 10. The thermal conductivity of component A refers to the thermal conductivity of the material of component A. For example, the housing 10 is made of aluminum, and the heat conductor 20 is made of copper. In some other embodiments, the housing 10 may also be made of copper, and the heat conductor 20 may also be made of silver. The housing 10 may also be made of iron, and the heat conductor 20 may also be made of copper, aluminum, or silver. The side of the heat conductor 20 facing away from the mounting opening 12 is used to mount the heating element 200. The heating element 200 contacts and is mounted on the side of the heat conductor 20 facing away from the mounting opening 12. Specifically, the heating element 200 is fixedly connected to the heat conductor 20 by means including but not limited to welding or adhesive bonding. The heating element 200 and the heat conductor 20 exchange heat.
[0055] For example, there are multiple heat conductors 20 and multiple heating elements 200, with each heat conductor 20 covering one mounting opening 12. The multiple heat conductors 20 are arranged sequentially at intervals along the X-axis, and each heating element 200 is fixedly connected to one heat conductor 20. In some other embodiments, the number of heat conductors 20 and heating elements 200 may be only one.
[0056] like Figure 2 , Figure 3 and Figure 7 As shown, the liquid cooling connector 50 is disposed on one side of the housing 10 in the thickness direction. Specifically, the liquid cooling connector 50 is disposed on the side of the housing 10 opposite to the heat conductor 20 in the thickness direction (i.e., the side of the housing 10 opposite to the heat conductor 20 in the Z-axis direction). The liquid cooling connector 50 is fixedly stacked with the housing 10 by means including but not limited to fasteners, welding, or adhesive bonding. In some other embodiments, the liquid cooling connector 50 may also be integrally formed with the housing 10, which is beneficial for improving strength, structural stability, and reliability.
[0057] The liquid cooling connector 50 is connected to the fluid cavity 11. Specifically, the liquid cooling connector 50 includes a fluid channel 51, which includes two mating openings 511. One mating opening 511 is connected to the fluid cavity 11, and the other mating opening 511 is located on one side of the liquid cooling connector 50 in the X-axis direction and exposed outside the liquid cooling radiator 100. There are multiple fluid channels 51, including a first fluid channel 51a and a second fluid channel 51b spaced apart in the Y-axis direction. The first fluid channel 51a is connected to the first connecting section 111 of the fluid cavity 11, and the second fluid channel 51b is connected to the second connecting section 112 of the fluid cavity 11.
[0058] The fluid chamber 11 is used for the flow of coolant. The coolant can be a fluid such as water, ethylene glycol, or propylene glycol. The coolant flows into or out of the fluid chamber 11 through the liquid cooling connector 50. Specifically, the coolant flows from the first fluid channel 51a into the first connecting section 111, then through multiple third connecting sections 113 into the second connecting section 112, and then out of the liquid-cooled radiator 100 through the second fluid channel 51b. The heat generated by the heat-generating device 200 can be transferred through the heat conductor 20 to the coolant in the third connecting section 113 (fluid chamber 11), and then to the external environment, thus achieving heat dissipation for the heat-generating device 200.
[0059] like Figure 2 , Figure 3 and Figure 5 As shown in the embodiment of this application, in the liquid-cooled radiator 100, coolant flows in the fluid cavity 11, and the heat conductor 20 can exchange heat with the heat-generating device 200. The heat generated by the heat-generating device 200 can be transferred to the coolant in the fluid cavity 11 through the heat conductor 20, and then transferred to the external environment through the coolant, thereby achieving heat dissipation for the heat-generating device 200. The design of the first sealing ring 30 and the second sealing ring 40 can achieve a seal between the housing 10 and the heat conductor 20, which helps to reduce the probability of coolant flowing from the installation opening 12 through the gap between the heat conductor 20 and the housing 10 to the external environment, which helps to reduce the risk of leakage, reduces the risk of damage to the heat-generating device 200 due to contact between the coolant and the heat-generating device 200, and improves the reliability of the heat-generating device 200.
[0060] Furthermore, in the event of failure of the first sealing ring 30, the coolant will flow from the first sealing ring 30 to the second sealing ring 40. The design of the drain groove 13 and the through hole 14 ensures that the coolant flows into the drain groove 13 and then out of the liquid-cooled radiator 100 through the through hole 14 during the process of flowing towards the second sealing ring 40. This avoids contact between the coolant and the second sealing ring 40, which is beneficial to improving the reliability and sealing effect of the second sealing ring 40, reducing the risk of leakage, and improving the reliability of the heat-generating device 200. Moreover, it avoids the need for additional design of the first sealing ring 30 and the second sealing ring 40. It can be achieved simply by opening the drain groove 13 and the through hole 14 in the housing 10, which is convenient for design. It is not only widely applicable and universal, but can also be applied to various liquid-cooled radiators 100. In addition, the processing cost is low, which helps to reduce the processing cost of the liquid-cooled radiator 100. The design of the through hole 14 and the fluid cavity 11 being spaced apart can prevent the coolant in the fluid cavity 11 from flowing directly into the drain groove 13 through the through hole 14 and then contacting the second sealing ring 40, which would cause the second sealing ring 40 to fail. This is beneficial to improving the reliability and sealing effect of the second sealing ring 40 and reducing the risk of leakage.
[0061] Because the thermal conductivity of the heat conductor 20 is greater than that of the housing 10, the heat generated by the heating element 200 can be transferred to the coolant in the fluid cavity 11 more quickly, which is beneficial to improving the heat dissipation efficiency of the heating element 200. Moreover, compared to improving the overall thermal conductivity of the liquid-cooled radiator 100, only the thermal conductivity of the heat conductor 20 needs to be improved, which helps to reduce processing costs and facilitates the lightweight design of the liquid-cooled radiator 100. Figure 2 , Figure 3 and Figure 5 In the illustrated embodiment, compared to a design where both the housing 10 and the heat conductor 20 are made of aluminum, the design uses aluminum for the housing 10 and copper for the heat conductor 20. Since copper has a higher thermal conductivity than aluminum, the heat conductor 20 can transfer the heat from the heating element 200 to the coolant in the fluid cavity 11 more quickly, thus improving the heat dissipation efficiency of the heating element 200. Compared to a design where both the housing 10 and the heat conductor 20 are made of copper, the design uses aluminum for the housing 10 and copper for the heat conductor 20. Because aluminum is lighter than copper, this design helps reduce the weight of the liquid-cooled radiator 100, facilitating a lightweight design.
[0062] In some embodiments, the projection of the heating element 200 along the Z-axis (i.e., the thickness direction of the housing 10) overlaps with the projection of the mounting opening 12 along the Z-axis (i.e., the thickness direction of the housing 10). In this way, the heat generated by the heating element 200 can be transferred along the Z-axis (i.e., the thickness direction of the housing 10) to the coolant in the fluid cavity 11 via the heat conductor 20, which helps to shorten the heat dissipation path and improve the heat dissipation efficiency of the heating element 200.
[0063] In some embodiments, the heat conductor 20 has heat dissipation teeth 22 on the side facing the mounting opening 12, and the heat dissipation teeth 22 are housed in the fluid cavity 11. Specifically, the heat dissipation teeth 22 are in contact with and fixedly stacked with the heat conductor 20. This is beneficial to increasing the contact area between the heat conductor 20 and the coolant in the fluid cavity 11, which is beneficial to increasing the efficiency of heat transfer from the heat-generating device 200 to the coolant via the heat conductor 20, and thus improving the heat dissipation efficiency of the heat-generating device 200. In the Z-axis direction, the heat dissipation teeth 22 are in contact with the cavity wall of the fluid cavity 11. Specifically, the heat dissipation teeth 22 are in contact with the cavity wall of the third connecting section 113. This is beneficial to increasing the contact area between the heat dissipation teeth 22 and the coolant, which is beneficial to improving the heat dissipation efficiency of the heat dissipation teeth 22, and thus improving the heat dissipation efficiency of the heat-generating device 200. Exemplarily, there are multiple heat dissipation teeth 22, which are spaced apart from each other. In other embodiments, there may be only one heat dissipation tooth 22. The heat dissipation teeth 22 may also not be in contact with the cavity wall of the fluid cavity 11.
[0064] like Figure 2 , Figure 4 and Figure 7 As shown, in some embodiments, the housing 10 includes a first plate 16 and a second plate 17. In the Z-axis direction (i.e., the thickness direction of the housing 10), the first plate 16 and the second plate 17 are opposite to and fixedly connected. The material of the first plate 16 is the same as that of the second plate 17. The first plate 16 and the second plate 17 can be fixedly connected by means including but not limited to brazing, gluing, or fastener connection. The first plate 16 and the second plate 17 together form a fluid cavity 11. In the Z-axis direction, a heat conductor 20 is disposed on the side of the first plate 16 facing away from the second plate 17, and the heat conductor 20 is fixedly connected to the first plate 16. A heating element 200 is disposed on the side of the heat conductor 20 facing away from the first plate 16. A liquid cooling connector 50 is disposed on the side of the second plate 17 facing away from the first plate 16.
[0065] In this way, the first plate 16 and the second plate 17 are fixedly connected to form the shell 10, which helps to reduce the processing difficulty and processing cost of the shell 10. In addition, the design that the first plate 16 and the second plate 17 are made of the same material helps to increase the strength of the fixed connection between them, which helps to improve the structural stability and reliability of the shell 10, and also helps to improve the structural stability and reliability of the liquid cooling radiator 100.
[0066] Please see Figure 8 and combined Figure 4 , Figure 5 and Figure 6 , Figure 8 yes Figure 2 An enlarged view of section VIII of the power conversion device 1000 shown.
[0067] like Figure 5 , Figure 6 and Figure 8 As shown, in some embodiments, the housing 10 has a mounting groove 18 communicating with the mounting opening 12 on one side of its thickness direction (i.e., the housing 10 in the Z-axis direction). The mounting groove 18 includes a bottom wall 182 disposed opposite to the opening 181 of the mounting groove 18, and the heat conductor 20 is housed in the mounting groove 18 and fixedly stacked with the bottom wall 182 of the mounting groove 18. Specifically, the mounting groove 18 is disposed on the side of the first plate 16 facing away from the second plate 17, and the opening 181 of the mounting groove 18 is located on the side of the first plate 16 facing away from the second plate 17. In the Z-axis direction, the mounting opening 12 is disposed on the side of the bottom wall 182 of the mounting groove 18 facing the heat conductor 20, specifically, the mounting opening 12 is located on the surface of the bottom wall 182 of the mounting groove 18 facing the heat conductor 20. That is, the mounting opening 12 is disposed on the side of the first plate 16 facing away from the second plate 17. The fixing hole 15 communicates with the mounting groove 18. The drain groove 13 is located on the side of the first plate 16 facing away from the second plate 17, and the opening 131 of the drain groove 13 is located on the side of the bottom wall 182 of the mounting groove 18 facing the heat guide 20.
[0068] This improves the space utilization between the housing 10 and the heat conductor 20, and facilitates the miniaturization design of the liquid-cooled radiator 100. Furthermore, the large contact area between the heat conductor 20 and the housing 10 enhances the connection strength between them, thereby improving the structural stability and reliability of the liquid-cooled radiator 100.
[0069] Furthermore, the dimension of the heat conductor 20 in the Z-axis direction is less than or equal to the dimension of the mounting groove 18 in the Z-axis direction. This improves the space utilization of the heat conductor 20 and the housing 10, and facilitates the miniaturization design of the liquid-cooled heat sink 100. Specifically, the dimension of the heat conductor 20 in the Z-axis direction is equal to the dimension of the mounting groove 18 in the Z-axis direction. In some other embodiments, the dimension of the heat conductor 20 in the Z-axis direction may also be smaller than the dimension of the mounting groove 18 in the Z-axis direction.
[0070] In some embodiments, one of the housing 10 and the heat conductor 20 has a receiving groove 19 on one side in the Z-axis direction (i.e., the thickness direction of the housing 10), and the other covers the receiving groove 19. The receiving groove 19 surrounds the mounting opening 12 and is used to receive the first sealing ring 30 or the second sealing ring 40. In this way, the receiving groove 19 can play a positioning role for the installation of the first sealing ring 30 and the second sealing ring 40, which facilitates the setting of sealing rings (including the first sealing ring 30 and the second sealing ring 40) in the liquid-cooled radiator 100 and helps to reduce the processing cost of the liquid-cooled radiator 100. Moreover, the design of the receiving groove 19 helps to improve space utilization and facilitates the miniaturization design of the liquid-cooled radiator 100.
[0071] Specifically, the receiving groove 19 is disposed on the side of the bottom wall 182 of the mounting groove 18 facing the heat conductor 20. The opening 191 of the receiving groove 19 is located on the side of the bottom wall 182 of the mounting groove 18 facing the heat conductor 20. The projection of the heat conductor 20 along the Z-axis direction covers the projection of the receiving groove 19 along the Z-axis direction. For example, there are multiple receiving grooves 19. The multiple receiving grooves 19 include a first receiving groove 19a and a second receiving groove 19b. The first receiving groove 19a is located between the mounting opening 12 and the drain groove 13, and surrounds the mounting opening 12 and is spaced apart from the mounting opening 12. The second receiving groove 19b surrounds the drain groove 13 and is spaced apart from the drain groove 13. The first sealing ring 30 is received in the first receiving groove 19a and abuts against the first plate 16 (i.e., the housing 10) and the heat conductor 20 in the Z-axis direction. The second sealing ring 40 is housed in the second receiving groove 19b and abuts against the first plate 16 (i.e., the housing 10) and the heat conductor 20 in the Z-axis direction. In some other embodiments, the receiving groove 19 may also be located on the side of the heat conductor 20 facing the housing 10 in the Z-axis direction, and the bottom wall 182 of the mounting groove 18 covers the receiving groove 19.
[0072] In some embodiments, the drain channel 13 includes a first channel wall 132, which is disposed opposite to the opening 131 of the drain channel 13. The projected area of the opening 131 of the drain channel 13 along the Z-axis (i.e., the thickness direction of the housing 10) is larger than the projected area of the first channel wall 132 along the Z-axis (i.e., the thickness direction of the housing 10). This is beneficial for increasing the size of the opening 131 of the drain channel 13, increasing the flow rate of coolant flowing into the drain channel 13 towards the second sealing ring 40, improving the draining efficiency of the coolant, enhancing the draining effect of the drain channel 13, reducing the risk of coolant contact with the second sealing ring 40, and improving the reliability of the second sealing ring 40.
[0073] Furthermore, the drain channel 13 includes a second channel wall 133 fixedly connected to the first channel wall 132. The second channel wall 133 faces the second sealing ring 40 and is inclined relative to the first channel wall 132 along the width direction of the drain channel 13 towards the first sealing ring 30. The second channel wall 133 is in contact with the heat conductor 20. In this way, the second channel wall 133 can guide the coolant flowing into the drain channel 13, which helps to increase the flow rate of the coolant flowing towards the second sealing ring 40 into the drain channel 13, which helps to improve the draining effect of the drain channel 13, reduces the risk of coolant contact with the second sealing ring 40, and improves the reliability of the second sealing ring 40.
[0074] Furthermore, the overflow channel 13 also includes a connecting channel wall 134, which is fixedly connected between the second channel wall 133 and the first channel wall 132, and is perpendicular to the first channel wall 132. With the second channel wall 133 and the first channel wall 132 fixedly connected, the angle of inclination between the second channel wall 133 and the first channel wall 132 is positively correlated with the size of the opening 131 of the overflow channel 13; the larger the angle of inclination between the second channel wall 133 and the first channel wall 132, the larger the size of the opening 131 of the overflow channel 13. The design of the second tank wall 133 being fixedly connected to the first tank wall 132 by connecting the tank wall 134 ensures that the inclination angle between the second tank wall 133 and the first tank wall 132 is large, thereby ensuring that the flow rate of coolant into the drain tank 13 is large. At the same time, it is beneficial to reduce the size of the opening 131 of the drain tank 13, to shorten the distance between the first sealing ring 30 and the second sealing ring 40, to improve space utilization, and to facilitate the miniaturization design of the liquid cooling radiator 100.
[0075] exist Figure 5 , Figure 6 and Figure 8 In the illustrated embodiment, the drain channel 13 further includes a mating channel wall 135. The mating channel wall 135 is fixedly connected to the first channel wall 132. In the width direction of the drain channel 13, the mating channel wall 135 and the connecting channel wall 134 are opposite to and spaced apart. The mating channel wall 135 is perpendicular to the first channel wall 132. In the direction from the opening 131 of the drain channel 13 towards the first channel wall 132 (i.e., the negative Z-axis direction), the distance between the mating channel wall 135 and the second channel wall 133 gradually decreases, while the distance between the mating channel wall 135 and the connecting channel wall 134 remains constant. This ensures a high flow rate of coolant into the drain channel 13 while reducing the size of the opening 131 of the drain channel 13, shortening the distance between the first sealing ring 30 and the second sealing ring 40, improving space utilization, and facilitating the miniaturization design of the liquid-cooled radiator 100. In some other embodiments, the mating groove wall 135 may also be inclined relative to the first groove wall 132 toward the second sealing ring 40 (or the first sealing ring 30).
[0076] In some embodiments, the minimum distance d1 between the drain groove 13 and the first sealing ring 30 is less than the minimum distance d2 between the drain groove 13 and the second sealing ring 40 in the width direction of the drain groove 13. Specifically, the minimum distance between the second groove wall 133 and the first sealing ring 30 is less than the distance between the mating groove wall 135 and the second sealing ring 40. This helps to shorten the distance between the drain groove 13 and the first sealing ring 30, allowing the coolant to flow into the drain groove 13 more quickly, improving the coolant drainage efficiency, enhancing the drainage effect of the drain groove 13, reducing the risk of coolant contact with the second sealing ring 40, and improving the reliability of the second sealing ring 40.
[0077] In some embodiments, the dimension of the drain channel 13 in the Z-axis direction (i.e., the thickness direction of the housing 10) is smaller than the dimension of the heat conductor 20 in the Z-axis direction (i.e., the thickness direction of the housing 10). This, while ensuring good drainage performance, helps to reduce the dimension of the drain channel 13 in the Z-axis direction (i.e., the thickness direction of the housing 10), which is beneficial to improving the structural stability and reliability of the housing 10, and consequently, the structural stability and reliability of the liquid-cooled radiator 100.
[0078] like Figure 4 , Figure 5 and Figure 6 As shown, in some embodiments, the housing 10 is provided with mounting holes 171. Specifically, the mounting holes 171 are provided in the second plate 17. The mounting holes 171 communicate with the third connecting section 113 (i.e., the fluid cavity 11). The heat conductor 20 is provided with a limiting part 23 on the side facing the mounting opening 12. The limiting part 23 is partially received in the third connecting section 113 (i.e., the fluid cavity 11) and partially received in the mounting holes 171. Exemplarily, the number of mounting holes 171 and the number of limiting parts 23 are both multiple, specifically four. In other embodiments, the number of mounting holes 171 and the number of limiting parts 23 may also be one, two, or more. In this way, the cooperation of the mounting holes 171 and the limiting parts 23 can play a positioning role in the installation of the heat conductor 20 and the housing 10, which helps to reduce the assembly difficulty of the heat conductor 20 and the housing 10 and helps to reduce the processing cost of the liquid cooler 100.
[0079] Please see Figure 9 and combined Figure 8 , Figure 9 This is a partial structural schematic diagram of another power conversion device 1000 provided in an embodiment of this application.
[0080] like Figure 8 and Figure 9 As shown, Figure 9 The illustrated embodiments and Figure 8The embodiments shown are similar in structure, except that the structure of the overflow channel 13 is different. Figure 9 In the illustrated embodiment, the connecting wall 134 of the drain groove 13 can be omitted, and the second wall 133 contacts and is fixedly connected to the first wall 132. The width of the drain groove 13 gradually decreases in the direction (i.e., the negative Z-axis direction) from the opening 131 of the drain groove 13 towards the first wall 132. This results in a higher flow velocity of the coolant at the bottom of the drain groove 13 compared to the opening 131, allowing the coolant to flow out of the drain groove 13 to the outside of the liquid-cooled radiator 100 more quickly. This improves the coolant drainage efficiency, enhances the drainage effect of the drain groove 13, reduces the risk of coolant contact with the second sealing ring 40, and improves the reliability of the second sealing ring 40.
Claims
1. A liquid-cooled heat sink, characterized in that, The liquid-cooled radiator includes a housing, a heat conductor, a first sealing ring, and a second sealing ring; The housing includes a fluid cavity, a mounting opening, a drain groove, and a through hole. The mounting opening is located on one side of the housing in the thickness direction and communicates with the fluid cavity. The drain groove is located on the side of the housing where the mounting opening is located and surrounds the mounting opening, and is spaced apart from the fluid cavity. The through hole penetrates the housing along the thickness direction and communicates with the drain groove. The first sealing ring is located between the drain groove and the mounting opening and surrounds the mounting opening; the second sealing ring surrounds the drain groove. The heat conductor contacts the housing and covers the drain groove, the through hole and the mounting opening, and abuts against the first sealing ring and the second sealing ring.
2. The liquid-cooled heat sink according to claim 1, characterized in that, The thermal conductivity of the heat conductor is greater than that of the shell.
3. The liquid-cooled radiator according to claim 1, characterized in that, The through hole is spaced apart from the fluid cavity.
4. The liquid-cooled radiator according to any one of claims 1-3, characterized in that, The drain channel includes a first channel wall, which is disposed opposite to the opening of the drain channel. The area of the opening of the drain channel projected along the thickness direction of the shell is greater than the area of the first channel wall projected along the thickness direction of the shell.
5. The liquid-cooled radiator according to claim 4, characterized in that, The drain channel includes a second channel wall fixedly connected to the first channel wall. The second channel wall faces the second sealing ring and is inclined relative to the first channel wall along the width direction of the drain channel toward the first sealing ring. The second channel wall is in contact with the heat conductor.
6. The liquid-cooled radiator according to claim 5, characterized in that, The overflow channel also includes a connecting channel wall, which is fixedly connected between the second channel wall and the first channel wall, and the connecting channel wall is perpendicular to the first channel wall.
7. The liquid-cooled radiator according to claim 4 or 5, characterized in that, The width of the overflow channel gradually decreases in the direction from the opening of the overflow channel toward the first channel wall.
8. The liquid-cooled radiator according to any one of claims 1-7, characterized in that, In the width direction of the drain groove, the minimum distance between the drain groove and the first sealing ring is less than the minimum distance between the drain groove and the second sealing ring.
9. The liquid-cooled radiator according to any one of claims 1-8, characterized in that, The dimension of the drain channel in the thickness direction of the housing is smaller than the dimension of the heat conductor in the thickness direction of the housing.
10. The liquid-cooled radiator according to any one of claims 1-9, characterized in that, The housing has a mounting groove on one side in the thickness direction that communicates with the mounting opening. The mounting groove includes a bottom wall that is disposed opposite to the opening of the mounting groove. The heat conductor is housed in the mounting groove and is fixedly stacked with the bottom wall of the mounting groove.
11. The liquid-cooled radiator according to any one of claims 1-10, characterized in that, In the housing and the heat conductor, one of them has a receiving groove on one side in the thickness direction of the housing, and the other covers the receiving groove. The receiving groove surrounds the mounting opening and is used to receive the first sealing ring or the second sealing ring.
12. The liquid-cooled radiator according to any one of claims 1-11, characterized in that, The heat conductor has heat dissipation teeth on the side facing the mounting opening, and the heat dissipation teeth are housed in the fluid cavity.
13. The liquid-cooled radiator according to any one of claims 1-12, characterized in that, The housing includes a first plate and a second plate. In the thickness direction of the housing, the first plate and the second plate are opposite to each other and fixedly connected. The material of the first plate is the same as that of the second plate.
14. A power conversion device, characterized in that, The power conversion device includes a liquid-cooled heat sink and a heating element as described in any one of claims 1-13, wherein the heating element is in contact with and disposed on the side of the heat conductor facing away from the mounting opening.
15. The power conversion device according to claim 14, characterized in that, The projection of the heating element along the thickness direction of the housing overlaps with the projection of the mounting opening along the thickness direction of the housing.