CN213755477U

CN213755477U - Liquid cooling radiator

Info

Publication number: CN213755477U
Application number: CN202022919935.3U
Authority: CN
Inventors: 余远建; 白晓峰; 连娟丽
Original assignee: Vertiv Tech Co Ltd
Current assignee: Weidi new energy Co.,Ltd.
Priority date: 2020-12-07
Filing date: 2020-12-07
Publication date: 2021-07-20
Anticipated expiration: 2030-12-07

Abstract

The utility model provides a liquid cooling radiator, this liquid cooling radiator includes: a housing having a liquid inlet and a liquid outlet; at least two sprue, parallelly connected setting in the casing, the both ends of every sprue communicate with inlet and liquid outlet respectively, and every sprue all includes a plurality of horizontal segments and a plurality of vertical section, is provided with a vertical section between two adjacent horizontal segments, a plurality of horizontal segment parallel arrangement. Through the technical scheme that this application provided, can solve the problem that the liquid cooling radiator among the prior art can't satisfy the heat dissipation demand.

Description

Liquid cooling radiator

Technical Field

The utility model relates to a radiator technical field particularly, relates to a liquid cooling radiator.

Background

At present, along with the high integration of power density in the power electronic industry, the requirement cannot be met by traditional air cooling heat dissipation inside equipment, so that the application of a liquid cooling technology in the power electronic industry is more introduced, and a liquid cooling radiator is widely adopted as a core heat dissipation component.

A typical water cooling technology in the power electronic industry is applied to a wind energy converter, the power density of the converter is higher due to the rapid development of the offshore wind power industry in recent years, but the existing liquid cooling radiator cannot meet the heat dissipation requirement.

SUMMERY OF THE UTILITY MODEL

The utility model provides a liquid cooling radiator to solve the problem that the liquid cooling radiator among the prior art can't satisfy the heat dissipation demand.

The utility model provides a liquid cooling radiator, liquid cooling radiator includes: a housing having a liquid inlet and a liquid outlet; at least two sprue, parallelly connected setting in the casing, the both ends of every sprue communicate with inlet and liquid outlet respectively, and every sprue all includes a plurality of horizontal segments and a plurality of vertical section, is provided with a vertical section between two adjacent horizontal segments, a plurality of horizontal segment parallel arrangement.

Further, the liquid cooling radiator also comprises a shunting structure, and the shunting structure is arranged in at least part of the horizontal section.

Further, the shunting structure includes the reposition of redundant personnel baffle, and the extending direction of reposition of redundant personnel baffle is the same with the extending direction of horizontal segment.

Further, the shunting structure includes a plurality of reposition of redundant personnel baffles, a plurality of reposition of redundant personnel baffles parallel arrangement.

Further, the liquid cooling radiator further comprises a bypass flow channel, and two ends of the bypass flow channel are respectively communicated with the two adjacent vertical sections.

Further, the bypass flow channel is arranged close to the liquid inlet.

Further, the liquid cooling radiator comprises a first main flow channel and a second main flow channel, and the first main flow channel is arranged on the periphery of the second main flow channel in a surrounding mode.

Further, the liquid inlet is positioned at the lower part of the shell, and the liquid outlet is positioned at the upper part of the shell.

Further, the main flow passage is symmetrically arranged in the housing in a thickness direction of the housing.

Furthermore, the main runner and the shell are of an integrally formed structure.

Use the technical scheme of the utility model, this liquid cooling radiator includes casing and two at least sprue, and two at least sprue are parallelly connected to be set up in the casing. Wherein, the casing has inlet and liquid outlet, and the both ends of every sprue communicate with inlet and liquid outlet respectively, and liquid can follow the inlet and get into two at least sprue respectively in, utilize two sprue to dispel the heat simultaneously. And, every sprue all includes a plurality of horizontal segments and a plurality of vertical section, is provided with a vertical section between two adjacent horizontal segments, a plurality of horizontal segments parallel arrangement. Because a plurality of horizontal segments and a plurality of vertical section series connection setting, the liquid that gets into in the sprue can flow through a plurality of horizontal segments and a plurality of vertical section in proper order, at the flow in-process of liquid, because a plurality of horizontal segments parallel arrangement, the liquid can flow in the casing reciprocating, and the casing has enough big heat transfer area, and then can promote the heat dispersion of liquid cooling radiator, and then makes the liquid cooling radiator satisfy the heat dissipation demand.

Drawings

The accompanying drawings, which form a part of the present application, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention and not to limit the invention. In the drawings:

fig. 1 shows a schematic structural diagram of a liquid-cooled heat sink according to an embodiment of the present invention;

fig. 2 is a schematic structural diagram illustrating another view angle of a liquid-cooled heat sink according to an embodiment of the present invention;

fig. 3 is a schematic structural diagram illustrating a liquid-cooled radiator provided with no bypass flow channel according to an embodiment of the present invention;

fig. 4 is a schematic structural diagram illustrating a liquid-cooled radiator provided with a bypass flow channel according to an embodiment of the present invention;

fig. 5 shows a schematic structural diagram of a liquid cooling radiator provided with an IGBT tube according to an embodiment of the present invention.

Wherein the figures include the following reference numerals:

10. a housing; 11. a liquid inlet; 12. a liquid outlet; 20. a main flow channel; 21. a horizontal segment; 22. a vertical section; 23. a first main flow passage; 24. a second main flow passage; 30. a flow splitting structure; 31. a flow dividing partition plate; 40. a bypass flow channel; 50. and (4) an IGBT tube.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

As shown in fig. 1 to 4, an embodiment of the present invention provides a liquid cooling radiator, which includes a housing 10 and at least two main flow channels 20, wherein the at least two main flow channels 20 are disposed in parallel in the housing 10. Wherein, casing 10 has inlet 11 and liquid outlet 12, and the both ends of every main flow passage 20 communicate with inlet 11 and liquid outlet 12 respectively, and liquid accessible inlet 11 gets into main flow passage 20 in, and after accomplishing the heat transfer, liquid can flow out casing 10 through liquid outlet 12. In the present embodiment, each main flow passage 20 includes a plurality of horizontal segments 21 and a plurality of vertical segments 22, one vertical segment 22 is disposed between two adjacent horizontal segments 21, and the plurality of horizontal segments 21 are disposed in parallel.

Use the liquid cooling radiator that this embodiment provided, liquid can get into two at least sprue 20 respectively from inlet 11 in, utilize two sprue 20 to dispel the heat simultaneously, the liquid that gets into in the sprue 20 can flow through a plurality of horizontal segments 21 and a plurality of vertical section 22 in proper order, at the flow in-process of liquid, because a plurality of horizontal segments 21 parallel arrangement, the liquid can be in casing 10 reciprocating flow, casing 10 has enough big heat transfer area, and then can promote the heat dispersion of liquid cooling radiator, and then make the liquid cooling radiator satisfy the heat dissipation demand.

The traditional liquid cooling radiator mostly adopts simple multi-branch parallel flow channels, heat exchange is realized through a large flow channel and large flow, and the traditional liquid cooling radiator is difficult to meet the requirement of high heat dissipation efficiency (more flow needs to be taken away under unit flow).

In this embodiment, the length of the horizontal section 21 is greater than the length of the vertical section 22, so as to ensure that the distance between two adjacent horizontal sections 21 is not too long, and further ensure that the liquid cooling radiator has a large enough heat exchange area.

As shown in fig. 1 and fig. 4, in order to further improve the heat dissipation effect, in this embodiment, the liquid-cooled heat sink further includes a flow dividing structure 30, and the flow dividing structure 30 is disposed in at least a portion of the horizontal section 21. The flow dividing structure 30 may be provided in all the horizontal segments 21, or may be provided in a part of the horizontal segments 21.

In other embodiments, the flow diversion structure 30 may also be disposed within the vertical section 22.

Specifically, the flow dividing structure 30 includes, but is not limited to, a flow dividing plate, a flow dividing boss, and the like, as long as the liquid in the flow channel can be divided.

As shown in fig. 1, in the present embodiment, the flow dividing structure 30 includes a flow dividing partition plate 31, and the extending direction of the flow dividing partition plate 31 is the same as the extending direction of the horizontal section 21, so that while the flow dividing of the liquid in the flow channel is realized by the flow dividing partition plate 31, it is ensured that the flow dividing partition plate 31 does not apply too much resistance to the liquid, so as to ensure the flow rate of the liquid in the flow channel.

In this embodiment, the length dimension of reposition of redundant personnel baffle 31 is the same with the length dimension of horizontal segment 21, all is provided with reposition of redundant personnel baffle 31 in whole horizontal segment 21 promptly, and in liquid gets into horizontal segment 21 until the in-process that liquid flows out from horizontal segment 21, liquid all is in the state of reposition of redundant personnel, so can guarantee the reposition of redundant personnel effect, and then guarantee the heat transfer effect.

In other embodiments, the dividing wall 31 may not be disposed over the entire horizontal section 21 according to the use requirement, so as to meet various use requirements.

As shown in fig. 1 and 2, the flow dividing structure 30 includes a plurality of flow dividing partitions 31, and the plurality of flow dividing partitions 31 are arranged in parallel. Under the reposition of redundant personnel effect of a plurality of reposition of redundant personnel baffles 31, the liquid that gets into in horizontal section 21 can be shunted into stranded fluid, utilizes stranded fluid to carry out the heat transfer simultaneously, and then can promote the heat transfer effect.

In the present embodiment, three dividing partitions 31 are disposed in parallel in the horizontal section 21, and the three dividing partitions 31 divide the horizontal section 21 into four small flow paths connected in parallel.

The traditional liquid cooling radiator water channel is simple in design, generally has no turbulent flow design, and is low in heat exchange efficiency.

In order to further improve the heat exchange effect, in this embodiment, the liquid cooling heat sink further includes a bypass flow channel 40, two ends of the bypass flow channel 40 are respectively communicated with the two adjacent vertical sections 22, and the ends of the two adjacent horizontal sections 21 that are not communicated with each other can be communicated by using the bypass flow channel 40.

In this embodiment, the bypass flow channel 40 is disposed near the loading port 11. Because the temperature of the liquid near inlet 11 is lower, bypass flow channel 40 is arranged at the position near inlet 11, and the one ends of two adjacent horizontal sections 21 near inlet 11 which are not communicated with each other are communicated by bypass flow channel 40, so that the temperature of the liquid in the flow channel can be reduced, and the heat exchange and cooling effects can be improved.

It should be noted that, in the present embodiment, the bypass flow passage 40 is provided close to the loading port 11, which means that the bypass flow passage 40 is located below the center line of the housing 10 in the vertical direction.

The bypass flow passage 40 well reduces the heat distribution gradient of the radiator through simulation verification, and the temperature gradient of the full-power liquid cooling radiator is within 2 degrees, so that the gradient is well reduced.

In other embodiments, the bypass flow passage 40 may be provided at other positions as long as the bypass effect can be achieved. Alternatively, a plurality of bypass flow paths 40 may be provided at the same time, and the temperature of the liquid in the flow paths may be reduced by the plurality of bypass flow paths 40 at the same time.

As shown in fig. 2, in the present embodiment, the liquid-cooled heat sink includes a first main flow passage 23 and a second main flow passage 24, and the first main flow passage 23 is surrounded by an outer periphery of the second main flow passage 24. By adopting the structure, the temperature of the liquid in the flow channel can be ensured not to be too high while the heat exchange area is increased, and the heat exchange and cooling effects of the liquid cooling radiator are further ensured.

It should be noted that the number of the main flow passages is not limited to two, and the number of the main flow passages can be adjusted adaptively according to the size of the housing 10 and the use requirement.

In this embodiment, the liquid inlet 11 is located at the lower portion of the housing 10, and the liquid outlet 12 is located at the upper portion of the housing 10. The liquid with lower temperature enters the flow channel from the liquid inlet 11 at the lower part of the shell 10, and after the heat exchange is completed, the liquid is discharged through the liquid outlet 12 at the upper part of the shell 10. Because the liquid outlet 12 is located at the upper portion of the housing 10, the gas in the liquid can be smoothly discharged from the liquid outlet 12, so as to ensure that the gas is not gathered in the flow channel, thereby ensuring the heat exchange effect.

Also, in the present embodiment, the liquid inlet 11 and the liquid outlet 12 are located on the same side of the housing 10, so that the housing 10 is convenient to assemble.

In the present embodiment, the main flow passage 20 is symmetrically disposed in the housing 10 in the thickness direction of the housing 10 such that the distance between the main flow passage 20 and both sides of the housing 10 is the same. When the components are mounted on the housing 10, the components may be mounted on one side of the housing 10 or simultaneously mounted on both sides of the housing 10.

Two opposite side walls of the housing 10 are mounting surfaces for components.

In the present embodiment, the main flow passage 20 and the housing 10 are integrally formed, so that the processing is facilitated, and the processing cost can be reduced. In addition, the main flow passage 20 and the housing 10 are integrally formed, so that the sealing performance of the flow passage can be ensured, and the problem of liquid leakage of the liquid cooling radiator can be avoided.

In order to reduce the flow resistance of the liquid in the flow channel, an arc-shaped section can be arranged at the junction of the horizontal section 21 and the vertical section 22, namely the turning of the flow channel, so as to ensure the flow speed of the fluid.

In the present embodiment, the horizontal section 21 extends in the horizontal direction, and the vertical section 22 extends in the vertical direction. Specifically, the horizontal section 21 and the vertical section 22 are both straight structures. In other embodiments, the vertical section 22 may be provided in an arc-shaped configuration as long as the plurality of horizontal sections 21 are ensured to be parallel to each other.

The traditional liquid cooling radiator usually adopts a drilling mode to process a flow channel, the flow channel has more transition right-angle turns, and the flow resistance is relatively large.

In order to facilitate understanding of the liquid cooling radiator provided in the present embodiment, the following description is made according to the small flow channel splitting principle:

(1) according to the liquid flow state distribution, the more stable the flow state is from the engineering point of view, i.e. the more laminar the flow state is, the easier the fluid constant flow distribution is, the main parameter for dividing the flow state is according to the reynolds number Re, which can be obtained by the following formula:

q is the flow rate in the pipe; d is the pipe diameter; gamma-kinematic viscosity of the fluid;

remarking: when the flow rate and the liquid type are determined, the flow state is closer to the laminar flow as the pipe diameter is larger and the Reynolds number is smaller.

(2) According to the equal pressure layout, the design of the parallel main flow channel is determined according to the proportional relation between the size of the cross section and the flow, the flow distribution of each branch is realized by connecting a plurality of branches in series, and the flow state of the fluid is more balanced by the quantity and the size of the parallel small branches.

As shown in fig. 5, in the present embodiment, the liquid-cooled heat sink is applied to an igbt (insulated Gate Bipolar transistor). The liquid cooling radiator can be provided with IGBT tubes 50 in a single-side layout mode, and the size of a flow channel can be adjusted according to loss and flow. The liquid cooling radiator can also be provided with IGBT tubes 50 in a double-sided layout mode, the whole series-parallel connection scheme of the flow channel is unchanged, and the size of the flow channel can be adjusted according to loss and flow, so that a high-power high-density power scheme is realized.

In other embodiments, the liquid-cooled heat sink may be applied to other components.

The device provided by the embodiment has the following beneficial effects:

(1) the scheme that the main runner and the branch runners are connected in series and in parallel is adopted, so that the heat exchange efficiency of the liquid cooling radiator can be improved;

(2) four small flow channels are connected in parallel in the chip heating concentration area, so that the heat exchange area of the heat concentration area is fully increased, and meanwhile, the turbulent flow of internal fluid is increased, so that the liquid fully exchanges heat with the radiator in the flowing process;

(3) in order to reduce the heat distribution gradient of the whole liquid cooling radiator, a bypass flow channel is designed in a main flow channel to balance the water temperature, and the fluid temperature of the main flow channel can be adjusted according to the size and the position of the bypass flow channel;

(4) the runners are symmetrically designed, the radiator can be provided with heating IGBT tubes on two sides and can be provided with heating IGBT tubes on one side, and the radiator is flexible and convenient.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.

Unless specifically stated otherwise, the relative arrangement of the components and steps, the numerical expressions, and numerical values set forth in these embodiments do not limit the scope of the present invention. Meanwhile, it should be understood that the sizes of the respective portions shown in the drawings are not drawn in an actual proportional relationship for the convenience of description. Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate. In all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values. It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.

In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the orientation words such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" etc. are usually based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplification of description, and in the case of not making a contrary explanation, these orientation words do not indicate and imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore, should not be interpreted as limiting the scope of the present invention; the terms "inner and outer" refer to the inner and outer relative to the profile of the respective component itself.

Spatially relative terms, such as "above … …," "above … …," "above … …," "above," and the like, may be used herein for ease of description to describe one device or feature's spatial relationship to another device or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if a device in the figures is turned over, devices described as "above" or "on" other devices or configurations would then be oriented "below" or "under" the other devices or configurations. Thus, the exemplary term "above … …" can include both an orientation of "above … …" and "below … …". The device may be otherwise variously oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

It should be noted that the terms "first", "second", and the like are used to define the components, and are only used for convenience of distinguishing the corresponding components, and if not stated otherwise, the terms have no special meaning, and therefore, the scope of the present invention should not be construed as being limited.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A liquid-cooled heat sink, comprising:

a housing (10) having a liquid inlet (11) and a liquid outlet (12);

at least two sprue (20), parallelly connected setting is in casing (10), every the both ends of sprue (20) respectively with inlet (11) with liquid outlet (12) intercommunication, every sprue (20) all include a plurality of horizontal segments (21) and a plurality of vertical section (22), adjacent two be provided with one between horizontal segment (21) vertical section (22), it is a plurality of horizontal segment (21) parallel arrangement.

2. A liquid-cooled heat sink according to claim 1, further comprising a flow dividing structure (30), said flow dividing structure (30) being disposed within at least a portion of said horizontal section (21).

3. The liquid-cooled heat sink of claim 2, wherein the flow dividing structure (30) includes a flow dividing wall (31), the flow dividing wall (31) extending in the same direction as the horizontal section (21).

4. A liquid-cooled heat sink according to claim 3, wherein said flow dividing structure (30) comprises a plurality of said dividing walls (31), said dividing walls (31) being arranged in parallel.

5. A liquid-cooled heat sink according to any of claims 1 to 4, further comprising a bypass flow channel (40), wherein two ends of the bypass flow channel (40) are respectively communicated with two adjacent vertical sections (22).

6. A liquid-cooled heat sink according to claim 5, characterised in that the bypass flow channel (40) is arranged adjacent to the liquid inlet (11).

7. A liquid-cooled heat sink according to any of claims 1-4, characterised in that the liquid-cooled heat sink comprises a first main flow channel (23) and a second main flow channel (24), the first main flow channel (23) being arranged around the periphery of the second main flow channel (24).

8. A liquid-cooled heat sink according to any of claims 1-4, characterised in that the liquid inlet (11) is located in a lower part of the housing (10) and the liquid outlet (12) is located in an upper part of the housing (10).

9. A liquid-cooled heat sink according to any one of claims 1-4, characterised in that the main flow channel (20) is arranged symmetrically in the housing (10) in the thickness direction of the housing (10).

10. A liquid-cooled heat sink according to any one of claims 1 to 4, characterised in that the main flow passage (20) is of integral construction with the housing (10).