A cold plate heat sink

Abstract

The utility model provides a cold plate radiator, include: base and at least one group of cold plate module, and cold plate module is fixedly installed on the base through the elastic clamping piece. Among them, the cold plate module includes base and apron, and the base is opened with the receiving cavity for accommodating the cooling liquid, and apron covers the opening at the receiving cavity, and the lateral surface of base is opened with the through -hole, and the through -hole is through with the receiving cavity. The adjacent two cold plate modules are equipped with the bellows, and the both ends of bellows are connected on the inner wall of two through -holes, and the cooling liquid flows between multiple cold plate modules through the bellows, and a plurality of pipe sections are formed on the bellows, each pipe section has a convex wave crest, and the adjacent two pipe sections form a recessed wave trough. The cold plate radiator can make the stress between multiple cold plate modules after assembly more uniform, and compatible small displacement and tolerance in the assembly process, reduce the generation of subsection gap, and then improve the welding quality, realize good sealing effect.

Description

Technical Field

[0001] This utility model relates to the field of heat dissipation technology, and in particular to a cold plate heat sink. Background Technology

[0002] Electronic devices generate heat during data processing. To effectively dissipate the heat from operating electronic components, heat dissipation devices are needed at the heat-generating parts of the electronic devices. Heat dissipation for electronic components mainly includes air cooling, heat pipe cooling, and water cooling. A common method using a cold plate heat sink involves mounting the device to be cooled onto the cold plate substrate, and then circulating a cooling medium through the substrate to achieve cooling.

[0003] In existing cold plate heat dissipation devices, the mainstream solution is to connect multiple cold plates in series and parallel through pipes. Chinese patent CN116234265A discloses a cold plate structure and heat dissipation device, including at least one set of cold plate modules. The cold plate module includes a cold plate base and a cover plate assembly disposed on the cold plate base. The cold plate base includes multiple integral cold plate bodies, each of which is provided with multiple flow channels. The cover plate assembly includes at least one cold plate cover and at least one water distributor, which is disposed on the cold plate cover. The water distributor has a hollow structure. The cold plate cover has multiple cover plate bodies, each of which has an inwardly recessed structure. The cover plate bodies cooperate with the cold plate bodies to form a sealed cavity communicating with the water distributor, and the multiple flow channels are located in the sealed cavity.

[0004] However, during the assembly of existing cold plate heat dissipation devices, due to uneven stress among multiple cold plates during assembly and factors such as assembly tolerances, gaps are easily formed when multiple cold plates are connected by pipes. This means that the connection between the pipes and the cold plates is not tight enough, leading to leakage.

[0005] Therefore, how to design a cold plate heat sink that can make the force between multiple cold plates more uniform after assembly, and accommodate the small displacements and tolerances during the assembly process, reduce the generation of segment gaps, thereby improving welding quality and achieving a good sealing effect. Utility Model Content

[0006] To address the shortcomings of existing technologies, this utility model provides a cold plate heat sink that enables more uniform stress distribution among multiple cold plates after assembly, accommodates minor displacements and tolerances during assembly, reduces segment gaps, thereby improving welding quality and achieving a good sealing effect.

[0007] The objective of this utility model is achieved through the following technical solution:

[0008] A cold plate heat sink includes: a base and at least one set of cold plate modules, wherein the cold plate modules are fixedly mounted on the base by elastic clamping members.

[0009] The cold plate module includes a base and a cover plate. The base has a receiving cavity for containing coolant, and the cover plate covers the opening of the receiving cavity. The side of the base has a through hole that communicates with the receiving cavity.

[0010] A corrugated pipe is provided between two adjacent cold plate modules. The two ends of the corrugated pipe are respectively connected to the inner walls of the two through holes. The coolant flows between the multiple cold plate modules through the corrugated pipe. Several pipe sections are formed on the corrugated pipe. Each pipe section has a raised peak, and a concave valley is formed between two adjacent pipe sections.

[0011] In one embodiment, the bellows is brazed to the inner wall of the through hole, at least two pipe sections at both ends of the bellows are inserted into the through hole, and the opening edge of the through hole is welded to one of the crests of the bellows.

[0012] In one embodiment, an inner sleeve is provided inside the through hole, and a retaining gap is formed between the inner sleeve and the inner wall of the through hole, and both ends of the bellows are inserted into the retaining gap;

[0013] The corrugated pipe is brazed to connect the inner sleeve and the inner wall of the through hole. Part of the corrugated pipe's crests abut against the inner wall of the through hole, and part of the corrugated pipe's troughs abut against the inner sleeve. The opening edge of the through hole is welded to one of the corrugated pipe's crests.

[0014] In one embodiment, both the base and the bellows are made of copper.

[0015] In one embodiment, the thickness of the corrugated pipe is 0.16 mm, and the gap between two adjacent cold plate modules is 3-6 mm.

[0016] In one embodiment, the elastic clamping member has two elastic arms, and each of the cover plates has a positioning groove adapted to the elastic arms. The elastic clamping member is detachably clamped on the base. During installation, the elastic arms are received in the positioning grooves and pressed against the cover plate, thereby locking the cold plate module on the base.

[0017] In one embodiment, the elastic clamping member is provided with a barb portion, and the base is provided with a snap-fit ​​port that mates with the barb portion. When the elastic clamping member mates with the base, the barb portion passes through the snap-fit ​​port.

[0018] In one embodiment, the elastic clamping member is made of a one-piece molded spring steel structure.

[0019] In summary, the cold plate heat sink of this utility model enables more uniform stress distribution among multiple cold plate modules after assembly, and is compatible with minor displacements and tolerances during the assembly process, reducing the generation of segment gaps, thereby improving welding quality and achieving a good sealing effect. Attached Figure Description

[0020] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the embodiments will be briefly described below.

[0021] Figure 1 This is a schematic diagram of the structure of the cold plate heat sink of this utility model;

[0022] Figure 2 for Figure 1 The diagram shown is an exploded view of the cold plate heat sink.

[0023] Figure 3 for Figure 2 The diagram shown is an exploded view of the cold plate module.

[0024] Figure 4 for Figure 2 The plan sectional view of the bellows shown;

[0025] Figure 5 for Figure 1 A partial schematic diagram of the cold plate heat sink is shown;

[0026] Figure 6 for Figure 2 The plan sectional view of the cold plate module shown;

[0027] Figure 7 This is a schematic diagram showing the fit between the bellows and the cold plate module.

[0028] Figure 8 This is a partial structural diagram of the cold plate module in another embodiment;

[0029] Figure 9 This is a schematic diagram illustrating the fit between the bellows and the cold plate module in another embodiment. Detailed Implementation

[0030] To facilitate understanding of this utility model, a more comprehensive description will be provided below with reference to the accompanying drawings. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification. It should be noted that the structures, proportions, sizes, etc., depicted in the accompanying drawings are merely for illustrative purposes to aid those skilled in the art and are not intended to limit the implementation conditions of this utility model. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in proportions, or adjustments to size, without affecting the effects and objectives achieved by this utility model, should still fall within the scope of the technical content disclosed in this utility model. Furthermore, the terms "upper," "lower," "left," "right," and "middle," etc., used in this specification are merely for clarity of description and are not intended to limit the scope of implementation of this utility model. Changes or adjustments to their relative relationships are also considered within the scope of implementation of this utility model without substantial changes to the technical content.

[0031] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0032] This utility model provides a cold plate heat sink 10, such as Figure 1 , Figure 2 and Figure 3 As shown, it includes: a base 100 and at least one set of cold plate modules 200, the cold plate modules 200 being fixedly mounted on the base 100 by elastic clamping members 300.

[0033] The cold plate module 200 includes a base 210 and a cover plate 220. The base 210 has a receiving cavity 201 for containing coolant, and the cover plate 220 covers the opening of the receiving cavity 201. The side of the base 210 has a through hole 211 (e.g., Figure 6 As shown, the through hole 211 communicates with the receiving cavity 201.

[0034] A bellows 230 is provided between two adjacent cold plate modules 200. The two ends of the bellows 230 are respectively connected to the inner walls of two through holes 211. Coolant flows between the multiple cold plate modules 200 through the bellows 230. Furthermore, as... Figure 4As shown, a plurality of pipe sections 231 are formed on the bellows 230, each pipe section 231 having a raised crest 2311, and a recessed trough 2312 being formed between two adjacent pipe sections 231. Compared with the straight pipe connection method of the prior art, the bellows 230 can better achieve contact sealing and transmit radial pressure, and its specific design principle is explained below.

[0035] Preferably, the bellows 230 is brazed to the inner wall of the through hole 211, and at least two pipe sections 231 at both ends of the bellows 230 are inserted into the through hole 211, and the opening edge of the through hole 211 is welded to one of the corrugations 2311 of the bellows 230 (e.g., Figure 7 (As shown).

[0036] In the cold plate heat sink 10 of this utility model, the elastic clamping member 300 provides downward pressure for fixing the cold plate module 200 to the base 100. For example, Figure 3 As shown, the elastic clamping member 300 has two elastic arms 310, and the cover plate 220 is provided with positioning grooves 221 that are adapted to the elastic arms 310 (e.g., Figure 5 As shown, the elastic clamping member 300 is detachably clamped onto the base 100. When the elastic clamping member 300 is installed, the elastic arm 310 is received in the positioning groove 221 and the elastic arm 310 is pressed against the cover plate 220, thereby locking the cold plate module 200 onto the base 100.

[0037] In this embodiment, as Figure 5 As shown, the elastic clamping member 300 is provided with a barb portion 320, and the base 100 is provided with a snap-fit ​​port 110 that mates with the barb portion 320. When the elastic clamping member 300 mates with the base 100, the barb portion 320 passes through the snap-fit ​​port 110. Preferably, the elastic clamping member 300 is made of one-piece molded spring steel, which has high strength and a certain degree of flexibility and plasticity.

[0038] The working principle of the cold plate heat sink 10 of this utility model will be explained below in conjunction with the above structure:

[0039] In use, multiple sets of cold plate modules 200 are arranged side by side on the base 100 (e.g. Figure 2 As shown in this embodiment, there are four sets of cold plate modules 200, and the first set of cold plate modules 200 and the last set of cold plate modules 200 are respectively connected to the liquid inlet pipe and the liquid outlet pipe; adjacent cold plate modules 200 are connected by a corrugated pipe 230 (e.g., Figure 7 (As shown). During heat dissipation, the cold plate radiator 10 is in contact with the heat source, and the coolant enters the receiving cavity 201 through the inlet pipe, flows through multiple receiving cavities 201 through the bellows 230, and is finally discharged from the outlet pipe.

[0040] Compared with existing straight pipes, the bellows 230 of this invention can better transmit radial pressure and is beneficial for sealing welding. The specific design principle of the bellows 230 is as follows:

[0041] During assembly, the elastic clamping member 300 applies pressure to each cold plate module 200. However, due to tolerances and errors, the pressure on each cold plate module 200 cannot be completely uniform, resulting in uneven force distribution among the multiple cold plate modules 200 and inconsistent downward displacement. Connecting adjacent cold plate modules 200 via a bellows 230, which has sections 231, allows for better transmission of radial pressure, thus making the force distribution among the multiple cold plate modules 200 more uniform. In other words, when one of the two adjacent cold plate modules 200 is subjected to greater pressure, the pressure will also be transmitted to one end of the bellows 230, thereby providing radial force to the bellows 230. The bellows 230 transmits the radial force to the other end and to the other cold plate module 200, so that the pressure on the two cold plate modules 200 tends to be the same, thus making the pressure on the multiple cold plate modules 200 more uniform.

[0042] Furthermore, during assembly, the crests 2311 of the bellows 230 can more tightly abut against the inner wall of the through hole 211 (e.g., Figure 7 As shown in the diagram, this allows heat to be transferred more quickly between the corrugated peak 2311 and the inner wall of the through-hole 211 during brazing, resulting in better fusion of the corrugated peak 2311 and the inner wall of the through-hole 211 and a tighter weld. It should be noted that the corrugated pipe 230 is partially inserted into the through-hole 211. This means that at least two pipe sections 231 on the corrugated pipe 230 are inserted into the through-hole 211, and the opening edge of the through-hole 211 is welded to one of the corrugated peaks 2311 of the corrugated pipe 230. In this way, the corrugated pipe 230 and the inner wall of the through-hole 211 form at least three seals, effectively achieving a tight seal.

[0043] Thus, the design of the bellows 230 allows for more uniform stress distribution among multiple cold plate modules 200, while also being compatible with minor displacements and tolerances during assembly. Furthermore, it can form multiple seals at the connection points, enhancing sealing performance and effectiveness, and reducing the generation of segment gaps.

[0044] In another embodiment, to further seal the bellows 230 and the through hole 211, such as... Figure 8 As shown, an inner sleeve 2111 is provided inside the through hole 211, and a retaining gap 2112 is formed between the inner sleeve 2111 and the inner wall of the through hole 211. Both ends of the bellows 230 are inserted into the retaining gap 2112. After assembly, as shown... Figure 9As shown, the bellows 230 is brazed to the inner wall of the inner sleeve 2111 and the through hole 211. Part of the corrugations 2311 of the bellows 230 abut against the inner wall of the through hole 211, and part of the troughs 2312 of the bellows 230 abut against the inner sleeve 2111. The opening edge of the through hole 211 is welded to one of the corrugations 2311 of the bellows 230.

[0045] By incorporating the inner sleeve 2111, the troughs 2312 of the bellows 230 can also be brazed together, forming multiple seals. Furthermore, the passage between external air and internal coolant becomes more tortuous, further improving sealing. Additionally, in this configuration, the welding points between the crests 2311 and the inner wall of the through-hole 211 do not come into contact with the coolant, reducing corrosion and further extending the product's service life.

[0046] Preferably, both the base 210 and the bellows 230 are made of copper, which has good ductility, thermal conductivity, and corrosion resistance, thus increasing heat dissipation performance and extending service life. Preferably, the thickness of the bellows 230 is 0.16mm, the gap between two adjacent cold plate modules 200 is 3-6mm, and the maximum fluctuation range of the gap is 0.5mm.

[0047] In summary, the cold plate heat sink 10 of this utility model can make the force between multiple cold plate modules 200 more uniform after assembly, and is compatible with small displacements and tolerances during the assembly process, reducing the generation of segment gaps, thereby improving welding quality and achieving a good sealing effect.

[0048] The embodiments described above are merely illustrative of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A cold plate heat sink, characterized in that, include: The base and at least one set of cold plate modules, wherein the cold plate modules are fixedly mounted on the base by elastic clamping members. The cold plate module includes a base and a cover plate. The base has a receiving cavity for containing coolant, and the cover plate covers the opening of the receiving cavity. The side of the base has a through hole that communicates with the receiving cavity. A corrugated pipe is provided between two adjacent cold plate modules. The two ends of the corrugated pipe are respectively connected to the inner walls of the two through holes. The coolant flows between the multiple cold plate modules through the corrugated pipe. Several pipe sections are formed on the corrugated pipe. Each pipe section has a raised peak, and a concave valley is formed between two adjacent pipe sections.

2. The cold plate heat sink according to claim 1, characterized in that, The corrugated pipe is brazed to the inner wall of the through hole, and at least two pipe sections at both ends of the corrugated pipe are inserted into the through hole, and the opening edge of the through hole is welded to one of the crests of the corrugated pipe.

3. The cold plate heat sink according to claim 1, characterized in that, An inner sleeve is provided inside the through hole, and a retaining gap is formed between the inner sleeve and the inner wall of the through hole. Both ends of the bellows are inserted into the retaining gap. The corrugated pipe is brazed to connect the inner sleeve and the inner wall of the through hole. Part of the corrugated pipe's crests abut against the inner wall of the through hole, and part of the corrugated pipe's troughs abut against the inner sleeve. The opening edge of the through hole is welded to one of the corrugated pipe's crests.

4. The cold plate heat sink according to claim 1, characterized in that, Both the base and the corrugated pipe are made of copper.

5. The cold plate heat sink according to claim 4, characterized in that, The gap between two adjacent cold plate modules is 3-6mm.

6. The cold plate heat sink according to claim 1, characterized in that, The elastic clamping member has two elastic arms, and each of the cover plates has a positioning groove adapted to the elastic arms. The elastic clamping member is detachably clamped on the base. During installation, the elastic arms are received in the positioning grooves and pressed against the cover plate, thereby locking the cold plate module on the base.

7. The cold plate heat sink according to claim 6, characterized in that, The elastic clamping member is provided with a barb portion, and the base is provided with a snap-fit ​​port that cooperates with the barb portion. When the elastic clamping member is cooperated with the base, the barb portion passes through the snap-fit ​​port.

8. The cold plate heat sink according to claim 7, characterized in that, The elastic clamping component is made of one-piece molded spring steel.

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