CN216205587U - Micro-channel heat sink capable of uniformly distributing flow - Google Patents
Micro-channel heat sink capable of uniformly distributing flow Download PDFInfo
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- CN216205587U CN216205587U CN202122545171.0U CN202122545171U CN216205587U CN 216205587 U CN216205587 U CN 216205587U CN 202122545171 U CN202122545171 U CN 202122545171U CN 216205587 U CN216205587 U CN 216205587U
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Abstract
The utility model is suitable for the field of heat exchange, and provides a microchannel heat sink capable of uniformly distributing flow, which comprises: a base; the cover plate is arranged on the base; and the micro-channel flow cavity is arranged between the base and the cover plate and used for improving the stability of the flow velocity of the fluid in the base. The microchannel flow cavity enables fluid to be uniformly distributed in each channel through staggered distribution of a plurality of groups of straight ribs, so that the condition of nonuniform fluid flow velocity is greatly improved, the stability of the system is improved, the requirement of uniform distribution of the fluid can be met without additionally increasing equipment such as a regulating valve and the like or using a special-shaped base structure, the complexity of the system and the power consumption required by flow are avoided being greatly increased, the straight ribs are not required to be cut short, and the heat exchange area is not reduced.
Description
Technical Field
The utility model belongs to the field of heat exchange, and particularly relates to a micro-channel heat sink capable of uniformly distributing flow.
Background
In recent decades, with the continuous development of microfabrication processes and microelectronic technologies, the integration level of devices in circuits is continuously improved, and the power and heat flux density brought by the integration level are also continuously improved, so that in order to meet the reliability of electronic components, a proper thermal management scheme becomes critical for electronic components with increasingly increased heat generation, otherwise, in practical applications, too high working temperature directly causes efficiency reduction, and even component burnout.
The first microchannel heat sinks were proposed in "high performance heat sinks in large scale integrated circuits" published in electronic device communications Vol 2, No 5 by Tukmann of Stanford university, USA in the last 80 centuries. The working principle is simple, and specifically: the cooling working medium flows into the main runner of the micro-channel heat sink cavity, then flows into the sub-runners composed of the straight ribs, the base and the cover plate, and takes away the heat transferred by the electronic component, fig. 3 is a structural schematic diagram of the prior art, the cooling working medium flows into the main runner of the micro-channel heat sink cavity from the left upper inlet, then flows into the channels between the straight ribs, and then flows out from the outlet, although the heat flow density of the heat sink can reach 790W/cm2, the phenomenon of uneven flow distribution in each micro-channel can occur, and further the uneven temperature distribution of the bottom surface of the heat sink can be caused, so that the reliability and other problems of the electronic component in the operation can be caused, for the above conditions, the following methods are generally used for processing: 1. the flow regulating valve is added in the heat sink heat dissipation system, but the complexity of the system is increased and the cost is increased; 2. the main flow channel in the heat sink uses a tapered flow channel, but the bottom plate of the heat sink is of a special-shaped structure, so that the manufacturing and assembling difficulty is increased; 3. the heat sink inner fins are cut short, but the total heat exchange area can be reduced, and the heat exchange effect is influenced.
At present, the heat flux density of an electronic element system is high, a general cooling fan cannot provide enough cooling capacity for a chip at all, the chip is easily damaged due to overheating, although the micro-channel heat exchanger has strong heat exchange capacity, the micro-channel heat exchanger still has the defect of large flow resistance, aiming at the defects and improvement requirements of the prior art, the micro-channel heat sink which is free of an additional device or structure, uniform in flow distribution and compact in structure is provided, the problems of uneven temperature distribution caused by uneven flow or complex system caused by an additional flow regulating valve at present are solved, and a more convenient, efficient and stable cooling mode is realized.
SUMMERY OF THE UTILITY MODEL
The utility model provides a micro-channel heat sink capable of uniformly distributing flow, and aims to solve the problem of large flow resistance of a micro-channel heat exchanger.
The utility model is realized in such a way that a micro-channel heat sink capable of uniformly distributing flow comprises:
a base;
the cover plate is arranged on the base; and the micro-channel flow cavity is arranged between the base and the cover plate and used for improving the stability of the flow velocity of the fluid in the base.
Preferably, the microchannel flow chamber comprises: the cavity is arranged in the base, one end of the cavity is provided with two fluid inlets penetrating through the inner wall of the base, and the two fluid inlets are symmetrically distributed at two corners of one end of the cavity; the two fluid outlets are symmetrically distributed at two corners of the other end of the cavity; the two fluid outlets penetrate through the inner wall of the base; and the straight rib is arranged in the cavity.
Preferably, the depth of the cavity is 3-5 mm.
Preferably, the two fluid inlets and the two fluid outlets are symmetrically distributed at two ends of the cavity in pairs, and the sizes of the fluid inlets and the fluid outlets are the same.
Preferably, the straight ribs are provided with a plurality of groups, the plurality of groups of straight ribs are distributed in a staggered mode, and the base is divided into a plurality of groups of parallel channels by the plurality of groups of straight ribs.
Preferably, the lengths and the cross-sectional shapes of the plurality of groups of straight ribs are the same.
Preferably, the shape of the plurality of groups of straight ribs can be rectangular, trapezoidal or triangular, and the plurality of groups of straight ribs are symmetrically arranged inside the base.
Preferably, the cover plate is fixedly connected with the base through screws, and a sealing gasket is arranged at the joint of the cover plate and the base.
Compared with the prior art, the embodiment of the application mainly has the following beneficial effects:
the microchannel flow cavity enables fluid to be uniformly distributed in each channel through staggered distribution of a plurality of groups of straight ribs, so that the condition of nonuniform fluid flow velocity is greatly improved, the stability of the system is improved, the requirement of uniform distribution of the fluid can be met without additionally increasing equipment such as a regulating valve and the like or using a special-shaped base structure, the complexity of the system and the power consumption required by flow are avoided being greatly increased, the straight ribs are not required to be cut short, and the heat exchange area is not reduced.
Drawings
FIG. 1 is a schematic structural diagram of a microchannel heat sink capable of uniformly distributing flow according to the present invention;
FIG. 2 is a graph comparing the average flow velocity and standard deviation of the cross-section of the channel between the straight ribs of the present invention and the prior art;
fig. 3 is a schematic view of a conventional straight intercostal channel structure.
FIG. 4 is a flow field diagram of the present invention;
FIG. 5 is a flow field diagram of the present prior art arrangement;
in the figure: 1. a base; 2. a cover plate; 3. a microchannel flow chamber; 301. a cavity; 302. a fluid inlet; 303. a fluid outlet; 304. straight ribs.
Detailed Description
Unless defined otherwise, 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 application belongs; the terminology used in the description of the application herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application; the terms "including" and "having," and any variations thereof, in the description and claims of this application and the description of the above figures are intended to cover non-exclusive inclusions. The terms "first," "second," and the like in the description and claims of this application or in the above-described drawings are used for distinguishing between different objects and not for describing a particular order.
Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the application. The appearances of the phrase in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. It is explicitly and implicitly understood by one skilled in the art that the embodiments described herein can be combined with other embodiments.
An embodiment of the present invention provides a microchannel heat sink capable of uniformly distributing a flow rate, as shown in fig. 1 to 5, including:
a base 1;
a cover plate 2 arranged on the base 1; and a micro-channel flow cavity 3 arranged between the base 1 and the cover plate 2 and used for improving the stability of the flow velocity of the fluid in the base 1.
In this embodiment, 1 length of base is 23mm, 1 width of base is 23mm, 1 wall thickness all around of base is 1mm, 2 length of the straight rib of rectangle are 14mm, the straight rib width of rectangle is 1mm, base 1 is the metal material that coefficient of heat conductivity is high, base 1 is dark for 3 ~ 5mm, and simple structure is compact, need not additionally increase equipment such as governing valve, also need not to use 1 structure of special-shaped base and can satisfy the requirement of fluid evenly distributed, avoid the complexity and the required consumption of flow that increase substantially the system.
In a further preferred embodiment of the present invention, as shown in FIGS. 1-5, the microchannel flow chamber 3 comprises:
the cavity 301 is arranged in the base 1, the cross section of the cavity 301 is rectangular, one end of the cavity 301 is provided with two fluid inlets 302 penetrating through the inner wall of the base 1, and the two fluid inlets are symmetrically distributed at two corners at one end of the cavity 301;
two fluid outlets 303 arranged at the other end of the cavity 301, wherein the two fluid outlets 303 are symmetrically distributed at two corners at the other end of the cavity 301; and two fluid outlets 303 penetrate through the inner wall of the base 1; and the number of the first and second groups,
the straight ribs 304 are arranged inside the cavity 301, and the depth of the cavity 301 is 3-5 mm.
In the present embodiment, the micro-channel flow chamber 3 can greatly improve the condition of non-uniform flow velocity of the fluid in the susceptor 1, thereby improving the stability of the system.
In a further preferred embodiment of the present invention, as shown in fig. 1-5, two fluid inlets 302 and two fluid outlets 303 are symmetrically distributed at two ends of the cavity 301, and the fluid inlets 302 and the fluid outlets 303 have the same size.
In this embodiment, the widths of the two fluid inlets 302 and the two fluid outlets 303 are both 2mm, the sizes of the fluid inlets 302 are the same, the flow rates of the inlet fluid and the outlet fluid are the same, and the processing and manufacturing are easy.
In a further preferred embodiment of the present invention, as shown in fig. 1-5, the plurality of sets of straight ribs 304 are disposed, the plurality of sets of straight ribs 304 are distributed in a staggered manner, the plurality of sets of straight ribs 304 divide the base 1 into a plurality of sets of parallel channels with the same distance, and the length and the cross-sectional shape of the plurality of sets of straight ribs 304 are the same.
In the present embodiment, the channel width is 1mm, from left to right, the first and tenth straight ribs 304 are offset from the heat sink center by 0.984mm, the second and ninth straight ribs 304 are offset from the heat sink center by 0.681mm, the third and eighth straight ribs 304 are offset from the heat sink center by 0.254mm, the fourth and seventh straight ribs 304 are offset from the heat sink center by-0.805 mm, the fifth and sixth straight ribs 2 are offset from the heat sink center by 1.481mm, the offset symmetry centers of the sets of straight ribs 304 range from-15% to + 15% of the length dimension of the heat sink, and the flow resistance is less affected by the staggered arrangement.
In a further preferred embodiment of the present invention, as shown in fig. 1-5, the plurality of sets of straight ribs 304 may be rectangular, trapezoidal or triangular, and the plurality of sets of straight ribs 304 are symmetrically disposed inside the base 1.
In the present embodiment, the shape of the plurality of sets of straight ribs 304 is designed to be rectangular, trapezoidal or triangular, so as to facilitate the fluid to be rapidly guided out from the inside of the base 1.
In a further preferred embodiment of the present invention, as shown in fig. 1-5, the cover plate is fixedly connected with the base by screws, and a sealing pad is disposed at the joint of the cover plate 2 and the base 1.
In this embodiment, the addition of a gasket between the connection of the cover 2 and the base 1 improves the sealing of the microchannel flow chamber 3, preventing the fluid from spreading or overflowing upwards
The working principle of the utility model is as follows: firstly, external fluid enters the cavity 301 through the two fluid inlets 302 simultaneously, the cavity 301 is divided into a plurality of groups of parallel channels with the same interval by the plurality of groups of straight ribs 304 in the cavity, and the fluid entering the base 1 is uniformly distributed into the parallel channels by the plurality of groups of straight ribs 304 in a staggered manner and then flows out through the two fluid outlets 303 respectively.
It should be noted that, for simplicity of description, the above-mentioned embodiments are described as a series of acts, but those skilled in the art will recognize that the present invention is not limited by the order of acts, as some steps may occur in other orders or concurrently in accordance with the utility model. Further, those skilled in the art should also appreciate that the embodiments described in the specification are preferred embodiments and that the acts and modules referred to are not necessarily required by the utility model.
In the embodiments provided in the present application, it should be understood that the disclosed apparatus may be implemented in other manners. For example, the above-described embodiments of the apparatus are merely illustrative, and for example, the above-described division of the units is merely a division of the microchannel heat sink logic function that can distribute the flow evenly, and the actual implementation may have another division manner, for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted or not executed. In addition, the shown or discussed mutual coupling or communication connection may be an indirect coupling or communication connection between devices or units through some interfaces, and may be in a telecommunication or other form.
The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.
The above examples are only used to illustrate the technical solution of the present invention, and do not limit the scope of the present invention. It is to be understood that the described embodiments are merely exemplary of the utility model, and not restrictive of the full scope of the utility model. All other embodiments, which can be derived by a person skilled in the art from these embodiments without making any inventive step, fall within the scope of the present invention. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art may still make various combinations, additions, deletions or other modifications of the features of the embodiments of the present invention according to the situation without conflict, so as to obtain different technical solutions without substantially departing from the spirit of the present invention, and these technical solutions also fall within the protection scope of the present invention.
Claims (8)
1. A microchannel heat sink for uniformly distributing a flow comprising:
a base;
the cover plate is arranged on the base; and the micro-channel flow cavity is arranged between the base and the cover plate and used for improving the stability of the flow velocity of the fluid in the base.
2. The microchannel heat sink of claim 1, wherein the microchannel flow chamber comprises:
the cavity is arranged in the base, one end of the cavity is provided with two fluid inlets penetrating through the inner wall of the base, and the two fluid inlets are symmetrically distributed at two corners of one end of the cavity;
the two fluid outlets are symmetrically distributed at two corners of the other end of the cavity; the two fluid outlets penetrate through the inner wall of the base;
and the straight rib is arranged in the cavity.
3. The microchannel heat sink of claim 2, wherein the cavity has a depth of 3-5 mm.
4. The microchannel heat sink of claim 2, wherein the two fluid inlets and the two fluid outlets are symmetrically distributed at two ends of the chamber, and the fluid inlets and the fluid outlets have the same size.
5. The microchannel heat sink of claim 2, wherein the plurality of sets of straight ribs are staggered, and the plurality of sets of straight ribs divide the base into a plurality of sets of parallel channels.
6. The microchannel heat sink of claim 5, wherein the plurality of sets of straight ribs have the same length and cross-sectional shape.
7. The microchannel heat sink of claim 2, wherein the plurality of sets of straight ribs are rectangular, trapezoidal, or triangular in shape, and the plurality of sets of straight ribs are symmetrically disposed inside the base.
8. The microchannel heat sink of claim 1, wherein the cover plate is fixedly connected to the base by screws, and a sealing gasket is disposed at the connection between the cover plate and the base.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122545171.0U CN216205587U (en) | 2021-10-21 | 2021-10-21 | Micro-channel heat sink capable of uniformly distributing flow |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122545171.0U CN216205587U (en) | 2021-10-21 | 2021-10-21 | Micro-channel heat sink capable of uniformly distributing flow |
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| Publication Number | Publication Date |
|---|---|
| CN216205587U true CN216205587U (en) | 2022-04-05 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202122545171.0U Active CN216205587U (en) | 2021-10-21 | 2021-10-21 | Micro-channel heat sink capable of uniformly distributing flow |
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2021
- 2021-10-21 CN CN202122545171.0U patent/CN216205587U/en active Active
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