Base plate structure and liquid cooling radiator thereof

Abstract

The present application provides a base plate structure and a liquid cooling radiator thereof. The liquid cooling radiator comprises a base plate structure, a jointing material and a channel structure. The base plate structure has a plurality of fins to form a plurality of liquid cooling flow channels. The top ends of the fins are provided with a covering portion and an exposed portion. The covering portion covers the top ends of the fins and / or the plurality of liquid cooling flow channels. The exposed portion forms a plurality of water inlet openings and water outlet openings which communicate with the plurality of liquid cooling flow channels. The channel structure is fixed to the covering portion by the jointing material. A water inlet channel and a water outlet channel in the channel structure communicate with the plurality of liquid cooling flow channels through the plurality of water inlet openings and water outlet openings to form a liquid flow channel. The covering portion covers the top ends of the fins and / or the plurality of liquid cooling flow channels to prevent the jointing material from being sucked into the gaps between the fins to block the liquid cooling flow channels.

Description

Technical Field

[0001] This invention relates to a water-cooled heat dissipation device for electronic devices, and more particularly to a base plate structure that prevents solder from clogging the gaps between fins, and a liquid-cooled heat sink using this base plate structure. Background Technology

[0002] In electronic devices, such as servers, there are various electronic components inside, such as central processing units (CPUs) and graphics processing units (GPUs). These electronic components generate heat when they operate, so coolant (such as cooling water) must be used to cool them to prevent the electronic components from malfunctioning due to overheating, which could lead to the entire server becoming unusable.

[0003] There are many types of liquid cooling technologies and coolants available, each with varying performance. Among them, water-cooled plates (heads) are widely used in server products due to their high cooling efficiency and relatively low manufacturing cost. A typical water-cooled plate consists of a base plate and a top cover. The base plate has multiple fins, and solder is placed between these fins and the top cover. The solder is heated to melt and hard-solder the fins to the top cover, thus forming a single, integrated water-cooled plate structure.

[0004] However, with the ever-increasing demands for cooling efficiency, the spacing between multiple fins in a water-cooled plate structure has been reduced from more than 0.15 mm to 0.1 mm, or even 0.07 mm or less. Only water-cooled plates with microchannels formed in this way can meet current water cooling requirements. However, due to the significant reduction in the spacing between multiple fins, capillary forces are easily generated between them. When the solder is heated and melted, the solder on the multiple fins is drawn into the gaps between them due to the capillary forces, thus blocking the water cooling channels between the fins. This results in reduced cooling efficiency or even failure of the water-cooled plate structure.

[0005] Therefore, how to solve the technical problem of solder clogging the water cooling channels caused by the significant reduction in the spacing between multiple fins in the water-cooled plate structure is a direction that relevant developers are eager to study and improve. Summary of the Invention

[0006] Therefore, in order to effectively solve the above problems, the purpose of this invention is to provide a base plate structure that can prevent solder from clogging the gaps between fins.

[0007] Another object of the present invention is to provide a liquid-cooled heat sink using a base plate structure.

[0008] To achieve the above objectives, the present invention provides a base plate structure, characterized in that it comprises:

[0009] A base has a body and a plurality of fins. The body has a heat-absorbing side and a heat-conducting side opposite to the heat-absorbing side. The plurality of fins are disposed on the heat-conducting side, and a plurality of liquid cooling channels are formed between the plurality of fins and the heat-conducting side. The top of the plurality of fins is provided with a covering part and an exposed part. The covering part is used to cover the plurality of liquid cooling channels and / or the top of the plurality of fins, and the exposed part is used to form a plurality of openings communicating with the plurality of liquid cooling channels.

[0010] The covering portion includes at least one stop member, which is disposed on the top of the plurality of fins. The exposed portion of the plurality of fins is not covered by the stop member and is exposed, and the plurality of openings are formed in the exposed portion.

[0011] The covering portion includes at least one folded edge, which is integrally formed with the fin.

[0012] The folded edge includes a fixed end and a free end. The fixed end is connected to the fin, and the free end abuts against or crosses over another adjacent fin.

[0013] The stop member has at least one connecting portion and one stopping portion. The connecting portion is connected to the top of the plurality of fins, and the stopping portion is used to stop at least one connecting material.

[0014] It also includes:

[0015] A welding fixing part is provided on the joint and the plurality of fins to connect the joint and the plurality of fins.

[0016] The welding fixing part includes a plurality of welding points, which are arranged in a straight line, an oblique line, a zigzag line, or a wavy line.

[0017] To achieve another objective mentioned above, the present invention provides a liquid-cooled heat sink, characterized in that it comprises:

[0018] A base plate structure includes a base, the base having a body and a plurality of fins, the body having a heat-absorbing side and a heat-conducting side opposite to the heat-absorbing side, the plurality of fins being disposed on the heat-conducting side, and a plurality of liquid cooling channels being formed between the plurality of fins and the heat-conducting side, wherein the top of the plurality of fins is provided with a covering part and an exposed part, the covering part being used to cover the plurality of liquid cooling channels and / or the top of the plurality of fins, and the exposed part being used to form a plurality of water inlet openings and a plurality of water outlet openings communicating with the plurality of liquid cooling channels;

[0019] A channel structure is disposed on the base plate structure and covers the plurality of fins. The channel structure and the base plate structure together form a cold liquid flow channel. The cold liquid flow channel includes at least one inlet channel and one outlet channel disposed within the channel structure, and a plurality of liquid cooling channels, a plurality of inlet openings, and a plurality of outlet openings disposed on the base plate structure. The inlet channel and the outlet channel are respectively connected to the plurality of liquid cooling channels through the plurality of inlet openings and the plurality of outlet openings.

[0020] A connecting material is disposed between the channel structure and the cover portion to fix the channel structure to the base plate structure.

[0021] The liquid-cooled radiator is characterized in that the cover portion includes at least one stop member, the at least one stop member is disposed on the top of the plurality of fins, the exposed portion of the plurality of fins is not covered by the stop member and is exposed, and the plurality of water inlet openings and the plurality of water outlet openings are formed in the exposed portion, and the channel structure has at least one groove to accommodate the stop member and the bonding material.

[0022] The liquid-cooled radiator is characterized in that the cover includes at least one folded edge, which is integrally formed with the fin.

[0023] The liquid-cooled heat sink is characterized in that it further comprises:

[0024] A top cover structure is disposed on the channel structure. The top cover structure has a water inlet and a water outlet. The water inlet channel is connected to the water inlet, and the water outlet channel is connected to the water outlet.

[0025] Therefore, the base plate structure provided by the present invention has a cover portion at the top of a plurality of fins. This cover portion covers the plurality of liquid cooling channels and / or the tops of the plurality of fins, preventing the bonding material from being drawn into the gaps between the fins. This solves the problem of the bonding material clogging the channels between the fins in traditional systems. Thus, the present invention, through the provision of this cover portion, can effectively prevent the bonding material from being drawn into the gaps between the plurality of fins, thereby ensuring that the liquid cooling channels defined between the fins are not blocked by the bonding material and maintaining unobstructed flow, thus ensuring and improving the cooling efficiency of the base plate structure. Furthermore, the cover portion also reinforces the fin structure to prevent deformation of the fins under external forces, and ensures that the liquid cooling radiator does not bulge during pressure testing. Attached Figure Description

[0026] Figure 1 This is a three-dimensional schematic diagram of the liquid-cooled heat sink of the present invention;

[0027] Figure 2 for Figure 1An exploded view of a liquid-cooled heatsink;

[0028] Figure 3 for Figure 2 A top view of the base plate structure in a liquid-cooled radiator;

[0029] Figure 4 for Figure 3 A side view of the base plate structure in a liquid-cooled radiator;

[0030] Figure 5 For along Figure 1 A cross-sectional diagram shown in section line 5-5;

[0031] Figure 6 For along Figure 1 A cross-sectional diagram shown in section line 6-6;

[0032] Figure 7 for Figure 2 A three-dimensional schematic diagram of the top plate of the channel in a liquid-cooled heat sink;

[0033] Figure 8 for Figure 7 A three-dimensional schematic diagram of the top plate of the passageway from another direction;

[0034] Figure 9 for Figure 2 A three-dimensional schematic diagram of the channel base plate in a liquid-cooled heat sink;

[0035] Figure 10 for Figure 9 A three-dimensional schematic diagram of the channel floor from another direction;

[0036] Figure 11 This is a top view of another base plate structure in the liquid-cooled heat sink of the present invention;

[0037] Figure 12 This is a side view of another base plate structure in the liquid-cooled heat sink of the present invention.

[0038] Explanation of reference numerals in the attached drawings: Liquid-cooled radiator 1; Base plate structure 2; Base 21; Receiving part 210; Body 211; Heat-absorbing side 2111; Heat-conducting side 2112; Fins 212; Liquid cooling channel 213; Covering part 22; Stop 221; Joint 2211; Stop 2212; Metal frame 224; Through-hole 225; Welding fixing part 23; Welding point 231; Exposed part 24; Opening 241; Water inlet opening 2411; Water outlet opening 2412; Channel structure 3; Cold liquid flow channel 30; Water inlet channel 301; Water outlet channel 302; Channel base plate 31; Water inlet through hole 311; Water outlet through hole 312; groove 313; protruding part 314; mounting part 315; channel top plate 32; water inlet chamber 320; water inlet inner channel 321; water inlet outer channel 322; water outlet chamber 323; water outlet outer channel 324; water outlet inner channel 325; concave groove 326; groove groove 327; bonding material 4; solder 41; upper cover structure 7; water inlet 71; water inlet channel 710; water outlet 72; water outlet channel 720; protruding part 73; bottom plate structure 8; base 81; body 811; fin 812; liquid cooling channel 813; folded edge 814; fixed end 8141; free end 8142. Detailed Implementation

[0039] The above-mentioned objectives of the present invention and its structural and functional characteristics will be described with reference to the preferred embodiments shown in the accompanying drawings.

[0040] like Figures 1 to 10 As shown, the present invention provides a liquid-cooled heat sink 1, comprising: a base plate structure 2, a channel structure 3, a bonding material 4, and a top cover structure 7. The base plate structure 2 includes a base 21, which has a body 211 and a plurality of fins 212 formed by a shovel tooth process. The body 211 has a heat-absorbing side 2111 and a heat-conducting side 2112 opposite to the heat-absorbing side 2111. The plurality of fins 212 are disposed on the heat-conducting side 2112, and a plurality of liquid cooling channels 213 are formed between the plurality of fins 212 and the heat-conducting side 2112. A covering portion 22 and an exposed portion 24 are provided on the top area of ​​the plurality of fins 212. The covering portion 22 extends and is arranged along the normal direction of the plurality of fins 212 to cover the plurality of liquid cooling channels 213 and / or the top of the plurality of fins 212. The exposed portion 24 is used to form a plurality of openings 241 communicating with the plurality of liquid cooling channels 213.

[0041] In this embodiment, the covering portion 22 includes at least one stopper 221, which is disposed on the top ends of the plurality of fins 212 to cover the top ends of the plurality of fins 212 to form the covering portion 22. The top ends of the plurality of fins 212 that are not covered by the stopper 221 and are exposed are defined as the exposed portion 24, and a plurality of openings 241 are formed on the exposed portion 24. The channel structure 3 is disposed on the base plate structure 2 and covers the plurality of fins 212, the covering portion 22, and the exposed portion 24. The bottom of the channel structure 3 has at least one groove 313 to accommodate the stopper 221 located on the top ends of the plurality of fins 212, such that the bottom surface of the channel structure 3 is aligned with the top ends of the plurality of fins 212, and together with the base plate structure 2, forms a cold liquid flow channel 30. The cold liquid flow channel 30 includes an inlet channel 301 and an outlet channel 302 disposed within the channel structure 3, and a plurality of liquid cooling channels 213 and a plurality of openings 241 disposed on the base plate structure 2. The inlet channel 301 and the outlet channel 302 are connected to the plurality of liquid cooling channels 213 via the plurality of openings 241. Furthermore, the connecting material 4 is disposed within the groove 313 of the channel structure 3 and located between the channel structure 3 and the cover portion 22, so that the channel structure 3 can be fixed to the cover portion 22 of the base plate structure 2 via the connecting material 4. The upper cover structure 7 is disposed on the channel structure 3. The upper cover structure 7 has an inlet 71 and an outlet 72. The inlet channel 301 is connected to the inlet 71, and the outlet channel 302 is connected to the outlet 72, thus forming the liquid-cooled radiator 1.

[0042] like Figures 2 to 6 As shown, the stop member 221 has at least one connecting portion 2211 and a stopping portion 2212. The stop member 221 covers the top ends of the plurality of fins 212, wherein the connecting portion 2211 is connected to the top ends of the plurality of fins 212, and the stopping portion 2212 is used to stop and support the joining material 4. In this embodiment, the connecting portion 2211 is connected to the top ends of the plurality of fins 212 by a welded fixing portion 23 formed by welding. The welded fixing portion 23 is provided on the connecting portion 2211 and the plurality of fins 212 to connect the connecting portion 2211 and the plurality of fins 212, and to fix the connecting portion 2211 to the top ends of the plurality of fins 212. In addition, the welded fixing portion 23 is formed by laser welding, but it is not limited to this. Other welding methods such as diffusion welding can also be applied to the present invention. In this embodiment, the welding fixing part 23 includes a plurality of welding points 231 formed by laser spot welding. The penetration depth of each welding point 231 is approximately less than 0.15 mm. The joint part 2211 is fixed to the plurality of fins 212 by the plurality of welding points 231, and the plurality of welding points 231 are arranged in two straight lines on the surface of the stop part 2212, such as... Figure 3 As shown. However, it is not limited to this. Other arrangement shapes, such as single or multiple diagonal lines, curves, serrated lines, wavy lines, meandering lines, or interlaced arrangements, can also be applied to the plurality of welding points 231 of the present invention. In other words, the present invention does not limit the arrangement shape of the plurality of welding points 231. In addition, in this embodiment, the covering part 22 includes a plurality of stop members 221, each stop member 221 is a metal sheet, and a plurality of welding points 231 in the form of two straight lines are formed on each metal sheet. Each welding point 231 is approximately 0.4 mm to 1 mm away from the side edge of the metal sheet. However, it is not limited to this and can be adjusted according to the actual situation, with the principle that the metal sheet does not warp or break and the welding point 231 must fall on the metal sheet. Understandably, the more curved or complex the shape of the plurality of welding points 231 is, the more points they connect with the tops of the plurality of fins 212 below. This can increase the bonding force between the stop 221 and the plurality of fins 212, and effectively strengthen the overall structural strength of the base plate structure 2, so as to prevent the plurality of fins 212 from deforming due to external forces.

[0043] In this embodiment, the stops 221 comprise a plurality of metal sheets, each having the connecting portion 2211 and the stop portion 2212. However, this is not the only possibility; the metal sheets can also be connected as a single unit to form a metal frame 224 with an opening pattern, such as... Figure 11 As shown, a plurality of through openings 225 are provided on the metal frame 224. In other words, the present invention does not limit the specific detailed shape of the stop 221. In this embodiment, the metal sheets are arranged in parallel intervals, and the length direction of the metal sheets is perpendicular to the length direction of the plurality of liquid cooling channels 213 defined between the plurality of fins 212. By placing the metal sheets on the top of the plurality of fins 212, a plurality of openings 241 are formed on the base plate structure 2, and the plurality of openings 241 connect the plurality of liquid cooling channels 213, and are interconnected with the water inlet channel 301 and the water outlet channel 302 of the channel structure 3 through the plurality of openings 241. Understandably, the plurality of openings 241 includes multiple inlet openings 2411 and outlet openings 2412, and the plurality of inlet openings 2411 and outlet openings 2412 are used to respectively connect the inlet channel 301 and the outlet channel 302 of the channel structure 3 to form the cold liquid flow channel 30. Specifically, the metal sheet is a copper sheet, but it is not limited to this; other thermally conductive metals such as gold, silver, aluminum, titanium, alloys, or stainless steel sheets can also be used in this invention.

[0044] Furthermore, such as Figures 2 to 6As shown, in this embodiment, the channel structure 3 may include a channel bottom plate 31 and a channel top plate 32 disposed on the channel bottom plate 31. The channel bottom plate 31 is disposed on the bottom plate structure 2 and covers the plurality of fins 212 and the stop member 221, so as to completely surround the plurality of fins 212 and the stop member 221 and tightly fix them to the bottom plate structure 2 to jointly form the cold liquid flow channel 30. The channel bottom plate 31 is provided with a plurality of water inlet holes 311 and water outlet holes 312 to respectively connect to the plurality of water inlet openings 2411 and water outlet openings 2412 on the bottom plate structure 2, and the channel bottom plate 31 is also provided with a plurality of elongated grooves 313 to accommodate the stop member 221. Since the connecting material 4 needs to be provided on the stop member 221, it is used to connect and fix it to the channel bottom plate 31 of the channel structure 3. Therefore, in this embodiment, the bonding material 4 includes a plurality of solder 41s, and the solder 41s are respectively disposed on the stop members 221, and the stop members 221 are welded and fixed to the channel bottom plate 31 by the solder 41s. It is understood that since the solder 41s are stopped or blocked by the stop members 221s, they will not flow downward (be sucked) into the gaps between the plurality of fins 212s, so as to avoid clogging of the plurality of liquid cooling channels 213s. In addition, since the stop members 221s are similar to being embedded in the grooves 313s, the stop members 221s can confine the solder 41s within the grooves 313s, thus effectively preventing the solder 41s from flowing out of the grooves 313s, and also enhancing the strength of the connection structure between the stop members 221s and the channel bottom plate 31.

[0045] like Figures 5 to 10As shown, in this embodiment, the channel top plate 32 is fixedly mounted on the channel bottom plate 31. The channel top plate 32 includes a water inlet chamber 320, a plurality of internal water inlet channels 321 communicating with the water inlet chamber 320, a plurality of external water inlet channels 322 respectively communicating with the internal water inlet channels 321, a water outlet chamber 323, a plurality of external water outlet channels 324 communicating with the water outlet chamber 323, and a plurality of internal water outlet channels 325 respectively communicating with the external water outlet channels 324. The water inlet chamber 320 and the water outlet chamber 323 are located on the channel top plate 31. The upper side of the channel 2, and the outlet chamber 323 surrounding the inlet chamber 320 to form a U-shaped structure, the inner inlet channels 321 extend downward from the inlet chamber 320 and penetrate the channel top plate 32, the outer inlet channels 322 extend forward and backward from the inner inlet channels 321 along the lower side of the channel top plate 32, the outer outlet channels 324 extend downward from the outlet chamber 323 and penetrate the channel top plate 32, and the inner outlet channels 325 extend from the outer outlet channels 324 along the lower side of the channel top plate 32 towards the center. The inlet holes 311 on the channel bottom plate 31 are respectively connected to the inner inlet channels 321 and the outer inlet channels 322, and the outlet holes 312 are respectively connected to the inner outlet channels 325 and the outer outlet channels 324.

[0046] It is understood that the water inlet chamber 320, the internal water inlet channels 321, the external water inlet channels 322, and the water inlet through holes 311 can be considered as jointly forming the water inlet channel 301, and the water outlet chamber 323, the external water outlet channels 324, the internal water outlet channels 325, and the water outlet through holes 312 can be considered as jointly forming the water outlet channel 302. Furthermore, the water inlet channel 301 and the water outlet channel 302 of the channel structure 3, as well as the plurality of liquid cooling channels 213 and the plurality of openings 241 of the base plate structure 2, can be considered as jointly forming the cold liquid flow channel 30. In this embodiment, the channel top plate 32 and the channel bottom plate 31 are two independently configured components, but this is not the only possibility. The channel top plate 32 and the channel bottom plate 31 can also be integrally formed into a single component, which can be manufactured by metal injection molding, metal casting, or 3D printing. In other words, the present invention does not limit the detailed structure of the channel structure 3, as long as it can form a channel structure that can split water inlet and outlet.

[0047] In addition, such as Figure 2 , Figures 5 to 6As shown, the upper cover structure 7 is disposed on the channel structure 3. The water inlet 71 of the upper cover structure 7 is connected to the water inlet channel 301 via a water inlet channel 710, and the water outlet 72 is connected to the water outlet channel 302 via a water outlet channel 720. In this embodiment, the upper cover structure 7 and the channel structure 3 are two independent components, but this is not the case. The upper cover structure 7 and the channel structure 3 can also be integrally formed into a single component, which can be manufactured by metal injection molding, metal casting, or 3D printing. In other words, the present invention does not limit the detailed structure of the upper cover structure 7, as long as it can form a cover structure with a water inlet and a water outlet pipe joint for connection with an external water cooling pipe. At the same time, the present invention can also choose to integrate the upper cover structure 7 and the channel structure 3 into a single distributor element.

[0048] Please refer to Figure 2 , Figures 5 to 10 As shown, when coolant (e.g., cold water, indicated by dashed arrows in the diagram) enters the water inlet chamber 320 in the water inlet channel 301 from the water inlet 71 of the upper cover structure 7 via the water inlet channel 710, it enters the water inlet through holes 311 located in the middle of the channel bottom plate 31 below through the water inlet inner channels 321 in the channel top plate 32. At the same time, the water inlet outer channels 322 connected to the water inlet inner channels 321 will transport the cold water from the water inlet inner channels 321 to the front and rear sides of the channel bottom plate 31 and enter the water inlet through holes 311 located on both sides. In this way, the cold water can pass through all the water inlet through holes 311 of the channel bottom plate 31 and enter the plurality of liquid cooling channels 213 through the plurality of water inlet openings 241. When the coolant absorbs the heat energy of the heat-conducting side 2112 and becomes hot water (represented by solid arrows in the figure), it enters the external water outlet channels 324 and the internal water outlet channels 325 of the channel top plate 32 through the plurality of liquid cooling channels 213 in the bottom plate structure 2, the plurality of water outlet openings 2412 and the water outlet through holes 312 of the channel bottom plate 31. Then, the hot water in the internal water outlet channels 325 flows into the external water outlet channels 324, and then enters the water outlet chamber 323. Finally, it leaves the water outlet channel 302 through the water outlet 720 and leaves the top cover structure 7 from the water outlet 720. In this way, the entire heat exchange process of the coolant in the cold liquid flow channel 30 is completed.

[0049] It is understandable that, in order to ensure that the upper cover structure 7, the channel structure 3, and the bottom plate structure 2 can be reliably and tightly joined to form the cold liquid flow channel 30, interlocking and fixing structures can be provided between them to achieve a watertight effect. For example... Figure 2 , Figures 5 to 6As shown, a protruding latching portion 314 is provided on the bottom plate 31 of the channel, and a recessed latching groove 326 corresponding to the protruding latching portion 314 is provided on the top plate 32 of the channel. The recessed latching groove 326 can engage with the protruding latching portion 314 to fix the top plate 32 of the channel onto the bottom plate 31 of the channel. In addition, a groove 327 is provided on the top plate 32 of the channel, and a protruding latching portion 73 is provided on the upper cover structure 7. The protruding latching portion 73 can engage with the groove 327 to fix the upper cover structure 7 onto the top plate 32 of the channel. Furthermore, a receiving portion 210 is provided around the body 211 of the base plate structure 2, surrounding the plurality of fins 212. A mounting portion 315 corresponding to the receiving portion 210 is provided on the channel base plate 31. The mounting portion 315 can be fixed to the receiving portion 210 to completely surround the plurality of fins 212. It is understood that adhesive can be provided between the recessed groove 326 and the protruding part 314, between the protruding part 73 and the groove 327, and between the mounting portion 315 and the receiving portion 210 to bond and fix them together and form a tight structure. However, this is not limited to this; welding methods such as hard soldering or diffusion welding can also be used to weld and fix the above components together. Furthermore, the contact surfaces between the top cover structure 7 and the channel structure 3, the contact surfaces between the channel structure 3 and the bottom plate structure 2, and the contact surfaces between the channel top plate 32 and the channel bottom plate 31 in the channel structure 3 can also be connected and fixed together to form a watertight structure using diffusion welding, hard welding, or adhesive bonding techniques, thereby forming the cold liquid flow channel 30.

[0050] like Figure 12As shown, another base plate structure 8 of the present invention can be used to replace the base plate structure 2 described above. This base plate structure 8 also includes a base 81, which has a body 811 and a plurality of fins 812 formed by a serrated process, with a plurality of liquid cooling channels 813 formed between the plurality of fins 812. The main difference between this base plate structure 8 and the base plate structure 2 described above is that each fin 812 has an integrally formed flange 814 at its top end, and the flange 814 is bent and extended along the normal direction of the fin 812 so that the flange 814 and the fin 812 form an L-shape in side view. The flange 814 includes a fixed end 8141 and a free end 8142. The fixed end 8141 connects to the fin 812, and the free end 8142 abuts against or crosses over another adjacent fin 812, thereby achieving the purpose of covering the liquid cooling channels 813. It is understandable that since the folded edge 814 and the aforementioned stop 221 serve the same purpose—to prevent the bonding material 4 from being sucked (flowed) into the gaps between the plurality of fins 812—the structural difference lies in that the folded edge 814 is located between the tops of two adjacent fins 812, while the stop 221 is located above the tops of the plurality of fins 212. Furthermore, the folded edge 814 is integrally formed with the fins 812, while the stop 221 needs to be fixed to the plurality of fins 212 by welding the fixing part 23. Therefore, the folded edge 814 can be considered as another embodiment of the aforementioned covering part 22. In other words, the present invention does not limit the detailed specific structure of the covering part 22; as long as it can achieve the effect of preventing the bonding material 4 from being sucked (flowed) into the gaps between the plurality of fins 812, it can be applied in the present invention.

[0051] In summary, the present invention provides a liquid-cooled heat sink comprising a base plate structure with a cover portion. The cover portion effectively prevents the bonding material from flowing (or being drawn into) the gaps between the plurality of fins, thus ensuring that the liquid cooling channels defined between the plurality of fins are not blocked by the bonding material and remain unobstructed, thereby ensuring and improving the cooling efficiency of the base plate structure. Furthermore, the cover portion also reinforces the plurality of fins in the base plate structure to prevent deformation of the fins under external forces, and ensures that the liquid-cooled heat sink does not bulge during pressure testing.

[0052] The present invention has been described in detail above, but the above description is only a preferred embodiment of the present invention and should not be construed as limiting the scope of the present invention. All equivalent changes and modifications made based on the present invention should still fall within the patent coverage of the present invention.

Claims

1. A base plate structure, characterized in that, Include: A base has a body and a plurality of fins. The body has a heat-absorbing side and a heat-conducting side opposite to the heat-absorbing side. The plurality of fins are disposed on the heat-conducting side, and a plurality of liquid cooling channels are formed between the plurality of fins and the heat-conducting side. The top of the plurality of fins is provided with a covering part and an exposed part. The covering part is used to cover the plurality of liquid cooling channels and / or the top of the plurality of fins, and the exposed part is used to form a plurality of openings communicating with the plurality of liquid cooling channels.

2. The base plate structure as described in claim 1, characterized in that, The covering portion includes at least one stop member, which is disposed on the top of the plurality of fins, the exposed portion of the plurality of fins is not covered by the stop member and is exposed, and the plurality of openings are formed in the exposed portion.

3. The base plate structure as described in claim 1, characterized in that, The cover includes at least one folded edge, which is integrally formed with the fin.

4. The base plate structure as described in claim 3, characterized in that, The folded edge includes a fixed end and a free end. The fixed end is connected to the fin, and the free end abuts against or crosses over another adjacent fin.

5. The base plate structure as described in claim 2, characterized in that, The stop member has at least one engaging portion and a stop portion, the engaging portion engaging with the top of the plurality of fins, and the stop portion being used to stop at least one engaging material.

6. The base plate structure as described in claim 5, characterized in that, Also includes: A welding fixing part is provided on the joint and the plurality of fins to connect the joint and the plurality of fins.

7. The base plate structure as described in claim 6, characterized in that, The welded fixing part includes a plurality of welding points, which are arranged in a straight line, a diagonal line, a zigzag line, or a wavy line.

8. A liquid-cooled heat sink, characterized in that, Include: A base plate structure includes a base, the base having a body and a plurality of fins, the body having a heat-absorbing side and a heat-conducting side opposite to the heat-absorbing side, the plurality of fins being disposed on the heat-conducting side, and a plurality of liquid cooling channels being formed between the plurality of fins and the heat-conducting side, wherein the top of the plurality of fins is provided with a covering part and an exposed part, the covering part being used to cover the plurality of liquid cooling channels and / or the top of the plurality of fins, and the exposed part being used to form a plurality of water inlet openings and a plurality of water outlet openings communicating with the plurality of liquid cooling channels; A channel structure is disposed on the base plate structure and covers the plurality of fins. The channel structure and the base plate structure together form a cold liquid flow channel. The cold liquid flow channel includes at least one inlet channel and one outlet channel disposed in the channel structure, and a plurality of liquid cooling channels, a plurality of inlet openings and a plurality of outlet openings disposed on the base plate structure. The inlet channel and the outlet channel are respectively connected to the plurality of liquid cooling channels through the plurality of inlet openings and the plurality of outlet openings. as well as A connecting material is disposed between the channel structure and the cover portion to fix the channel structure to the base plate structure.

9. The liquid-cooled heat sink as described in claim 8, characterized in that, The covering portion includes at least one stop member, which is disposed on the top of the plurality of fins. The exposed portion of the plurality of fins is not covered by the stop member and is exposed. The exposed portion forms the plurality of water inlet openings and the plurality of water outlet openings. The channel structure has at least one groove to accommodate the stop member and the bonding material.

10. The liquid-cooled heat sink as described in claim 8, characterized in that, The cover includes at least one folded edge, which is integrally formed with the fin.

11. The liquid-cooled heat sink as described in claim 8, characterized in that, Also includes: A top cover structure is disposed on the channel structure. The top cover structure has a water inlet and a water outlet. The water inlet channel is connected to the water inlet, and the water outlet channel is connected to the water outlet.

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