Micro-channel heat exchange assembly and application thereof

Abstract

The invention provides a micro-channel heat exchange assembly and application thereof, and relates to the technical field of microelectronic heat dissipation, the micro-channel heat exchange assembly comprises a substrate, a cover plate is mounted on the substrate, a fluid channel is formed between the cover plate and the substrate, a plurality of groups of convex starfish elements are arranged in the fluid channel, and the starfish elements are connected with the substrate. The starfish elements in adjacent rows or adjacent columns are arranged in a staggered manner, the starfish elements comprise a central disc, two groups of starfish elements in the same row or the same column and starfish elements in adjacent rows or adjacent columns between the two groups of starfish elements, and three vertexes of an equilateral triangle are formed in space; according to the micro-channel heat exchange assembly, marine organism starfish is used as a prototype, the micro-channel heat exchange assembly comprising the starfish array is designed, and the starfish elements in adjacent rows or adjacent columns are arranged in a staggered mode, so that the turbulent flow capacity of the micro-channel heat exchange assembly to fluid is improved, and the heat dissipation capacity of the micro-channel heat exchange assembly is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of microelectronic heat dissipation, and in particular to a microchannel heat exchange component and application thereof. Background Art

[0002] As users continue to pursue electronic devices, the appearance of electronic devices is getting smaller and smaller, and wearable and portable electronic devices are becoming more and more popular with users. Along with this, the integration of integrated circuits and microelectronic chips is getting higher and higher, and the size is getting smaller and smaller, which requires that the heat generated by integrated circuits and microelectronic chips can be taken away in time. Therefore, microchannel heat exchangers applied to integrated circuits and microelectronic chips came into being, which have the characteristics of small size, light weight, compact structure, easy packaging, and high heat dissipation performance.

[0003] In the prior art, a wave of bionic microchannel heat exchange components has emerged, including ladder-shaped and fish gill-shaped microchannel heat exchange components. Although these heat exchange components have improved the heat exchange efficiency to a certain extent, their flow disturbance ability, fluid resistance, pressure drop and blockage performance cannot meet the growing demand. Therefore, the present invention proposes a microchannel heat exchange component and its application to solve the problems existing in the prior art. Summary of the invention

[0004] In view of the above problems, the purpose of the present invention is to propose a microchannel heat exchange component and its application. The microchannel heat exchange component and its electronic chip have the advantages of strong flow disturbance ability, small fluid resistance and high heat dissipation efficiency, and solve the problems existing in the prior art.

[0005] To achieve the purpose of the present invention, the present invention is implemented through the following technical solutions: a microchannel heat exchange component, including a substrate, a cover plate is installed on the substrate, a fluid channel is formed between the cover plate and the substrate, a starfish element is provided in the fluid channel in a convex manner, and the starfish element is provided in several groups, the several groups of starfish elements are all connected to the substrate, and the starfish elements in adjacent rows or columns are staggered, the starfish elements include a central disk, two groups of starfish elements in the same row or column and the starfish elements in the adjacent row or column located between the two, forming three vertices of an equilateral triangle in space.

[0006] A further improvement is that arms and legs are radiating outward from the periphery of the central disk, and the arms and legs are provided in several groups, and belly plates are provided between the several groups of arms and legs.

[0007] A further improvement is that a circulating flow channel is also provided in the starfish element, the circulating flow channel is arranged parallel to the central disk, the circulating flow channel includes an annular channel, drainage channels are radially symmetrically distributed on the outside of the annular channel, and the drainage channels are provided in several groups, and the number of the drainage channels is adapted to the number of arms and legs.

[0008] A further improvement is that the arms and legs are in the shape of an arched spine, and the diameter of the arms and legs at one end close to the central disk is smaller than the diameter of the arms and legs at one end away from the central disk.

[0009] A further improvement is that: a first protrusion is provided on the arm, and the first protrusion is provided in a plurality of groups, and the sizes of the plurality of groups of first protrusions are arranged in order from small to large.

[0010] A further improvement is that: the central disk is provided with second protrusions, and the second protrusions are provided in a plurality of groups.

[0011] A further improvement is that the arc angle of the end of the arm and foot is 145° to 160°.

[0012] A further improvement is that the web is constructed in a concave arc shape.

[0013] A microchannel heat exchange component is used in electronic chips.

[0014] The beneficial effects of the present invention are:

[0015] (1) The present invention uses the marine organism starfish as a prototype to design a microchannel heat exchange component including a starfish array, and uses the staggered arrangement of the first starfish array and the second starfish array to enhance the flow disturbance capability of the present invention on the fluid, thereby enhancing the heat dissipation capability of the present invention.

[0016] (2) The present invention designs the spacing and staggered structure of the first starfish array and the second starfish to form an equidistant "T-shaped" structure, so that after the cooling medium flows into the fluid channel, it passes through a number of "T-shaped" structures to achieve multiple diversions and confluences, thereby enhancing the turbulence effect of the fluid and further improving the heat dissipation performance of the present invention.

[0017] (3) The present invention also generates a "divergence island" effect through the starfish element, and generates a "vortex phenomenon" and a "secondary flow phenomenon" at the concave arc of the web structure due to the centrifugal effect, so that the velocity distribution of the fluid originally in a laminar state is destroyed when passing through the web, the streamline rotates, and the boundary layer of the fluid is destroyed, the turbulence effect of the fluid is enhanced, and the heat dissipation effect of the present invention is greatly enhanced. At the same time, the "vortex phenomenon" and "secondary flow phenomenon" generated by the fluid at the web can also effectively flush and clean the concave arc of the web, avoid problems such as impurity adhesion, and improve the cleanliness of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a structural schematic diagram of the present invention.

[0019] Figure 2 It is a composition schematic diagram of the starfish array of the present invention.

[0020] Figure 3 It is a schematic diagram of the composition of the starfish element of the present invention.

[0021] Figure 4 It is a structural schematic diagram of the multi-layer microchannel heat exchange component of the present invention.

[0022] Figure 5 It is a schematic diagram of the working principle of the present invention.

[0023] Figure 6 It is a schematic diagram of the arc angle A, the upper arc angle B and the lower arc angle C provided by the present invention.

[0024] Figure 7 It is a schematic diagram of the circulation flow channel of the present invention.

[0025] Figure 8 It is a schematic structural diagram of the ladder-type (8a) and gill-type (8b) microchannel heat exchange components in the prior art provided by the present invention.

[0026] Fig. 9 It is a temperature cloud diagram of the microchannel heat exchange component experiment of the present invention.

[0027] Fig.10 It is a temperature cloud diagram of a comparative experiment of the ladder-type (8a) and gill-type (8b) microchannel heat exchange components provided by the present invention.

[0028] Fig.11 This is a comparative experimental diagram of the temperature rise of the cold fluid in each microchannel heat exchanger provided by the present invention.

[0029] Fig.12 It is a comparative experimental diagram of the pressure drop of each microchannel heat exchanger provided by the present invention.

[0030] Among them: 1. base plate; 2. cover plate; 3. fluid channel; 11. starfish element; 111. central disk; 112. arms and legs; 113. abdominal plate; 115. circulation channel; 1111. second protrusion; 1121. first protrusion; 1151. annular channel; 1152. drainage channel. DETAILED DESCRIPTION

[0031] In order to deepen the understanding of the present invention, the present invention will be further described in detail below in conjunction with examples. The examples are only used to explain the present invention and do not constitute a limitation on the protection scope of the present invention.

[0032] according to Figure 1-Figure 12As shown, this embodiment proposes a microchannel heat exchange component, including a substrate 1, a cover plate 2 is installed on the substrate 1, a fluid channel 3 is formed between the cover plate 2 and the substrate 1, a starfish element 11 is provided in the fluid channel 3, and the starfish element 11 is provided in a plurality of groups, the plurality of groups of starfish elements 11 are all connected to the substrate 1, and the starfish elements 11 in adjacent rows or columns are staggered, and the starfish element 11 includes a central disk 111.

[0033] It is worth noting that the base plate 1 and the cover plate 2 can be integrally formed.

[0034] Furthermore, a cooling medium inlet and a cooling medium outlet are respectively provided on both sides of the cover plate 2 or the base plate 1, so that the fluid passes through the cooling medium inlet, enters the fluid channel, and flows out from the cooling medium outlet, thereby completing the heat exchange of the cooling medium in the present invention.

[0035] It is worth noting that the microchannel heat exchange component provided by the present invention is suitable for various integrated circuits and electronic chips, and thus has broad industrial manufacturing application prospects, such as microelectronics, solar energy, medical devices, aerospace, smart home appliances, smart cars and other technical fields that require integrated circuits or electronic chips.

[0036] To make the composition of the starfish array more clear, see Figure 2 Shown is a schematic diagram of the composition of a starfish array provided in an embodiment of the present invention.

[0037] Specifically, along the flow direction of the fluid channel 3, the starfish elements 11 in adjacent rows or columns are staggered (see Figure 2 Two horizontal dotted frames or two vertical dotted frames in the middle). At the same time, the herringbone structure framed by the dotted frame is a spoiler separation and combination structure that generates spoiler. It is worth understanding that the starfish elements 11 on two parallel lines of any adjacent first starfish array / second starfish array form a spoiler separation and combination structure with the adjacent starfish elements of the second starfish array / first starfish array sandwiched between the two, so that the starfish elements 11 of the first starfish array and the second starfish array of the present invention can present a combination of multiple "herringbone" spoiler separation and combination structures, and any starfish element 11 is reused, thereby amplifying the effect of the spoiler separation and combination structure provided by the present invention, making the spoiler effect of the present invention better, and the flow path of the fluid longer, thereby improving the heat dissipation effect of the present invention.

[0038] It is worth noting that the equilateral triangle method is a preferred embodiment, and the isosceles triangle method can also meet the requirements of the present invention in theory.

[0039] Furthermore, the spacing between the starfish elements 11 in the first starfish array / the second starfish array is 40 mm, and the spacing between the first starfish array and the second starfish array is 20 mm.

[0040] Further, in order to make the structure of the starfish element 11 provided by the present invention clearer, please refer to Figure 3 Shown is a schematic diagram of the composition of the starfish element provided in an embodiment of the present invention.

[0041] Furthermore, the present invention improves the appearance structure of the starfish element 11 based on the appearance of the native marine organism starfish, further improving the turbulence effect of the present invention. Among them, the present invention reshapes the middle part of the starfish into a flat central disk 111, and extends radially and symmetrically outward along the outer periphery of the central disk 111 to form a plurality of arms 112, and the adjacent arms 112 are connected by a web 113 with an inwardly concave arc. When the fluid flows through any starfish element 11, the starfish element 11 produces a "divergence island" effect, and at the inwardly concave arc of the web 113 structure, due to the centrifugal effect, a "vortex phenomenon" and a "secondary flow phenomenon" are generated, so that the fluid originally in a laminar state has its velocity distribution destroyed when passing through the web 113, the streamline rotates, and then the boundary layer of the fluid is destroyed, the turbulence effect of the fluid is enhanced, and the heat dissipation effect of the present invention is greatly enhanced.

[0042] At the same time, the "eddy flow phenomenon" and "secondary flow phenomenon" generated by the fluid at the web 113 can also effectively flush and clean the concave arc of the web 113, avoiding problems such as impurity adhesion and improving the cleanliness of the present invention.

[0043] It is worth explaining that "diverter island" refers to a device used for fluid diversion, and the "vortex phenomenon" of the fluid refers to the vortex formed during the rotation of water. When the water flows through certain obstacles or is affected by external forces, the fluid will rotate and form a vortex phenomenon. Vortex phenomena are widely present in nature, such as vortices and waterspouts in rivers, lakes and seas. "Secondary flow phenomenon" means that if the flow along a boundary is affected by lateral pressure and produces a deviation parallel to the boundary, the fluid layer close to the boundary will be more deviated than the fluid layer farther away from the boundary due to its lower speed, which leads to a secondary flow superimposed on the mainstream.

[0044] The arms 112 are provided with 4 to 8 groups, and preferably 5 groups. The arms 112 are in the shape of an arched spine, and the diameter of the arm close to the central disk 111 is smaller than the diameter of the end away from the central disk 111. Specifically, the arched spine-shaped arms 112 are a popular structure, which can effectively reduce the flow resistance while enhancing the heat transfer efficiency of the fluid flowing through, thereby achieving the effect of reducing pressure drop and reducing blockage.

[0045] Furthermore, from the central disk 111 toward the arm 112, the arm 112 includes a plurality of first protrusions 1121 from small to large. Specifically, the first protrusions 1121 will further reduce the flow resistance of the fluid, and the first protrusions will increase the heat dissipation area between the fluid and the starfish element, thereby improving the heat exchange efficiency of the present invention.

[0046] Furthermore, the central disk adjacent to any arm 112 includes a second protrusion 1111 .

[0047] Preferably, the first protrusion 1121 and the second protrusion 1111 are spherical in shape, which can effectively reduce the fluid resistance of the fluid while increasing the contact area of ​​the fluid.

[0048] Preferably, there are four protrusions distributed from the second protrusion 1111 to the end of the first protrusion 1121 of the arm foot 112, and the spherical diameters of the protrusions are Φ1=0.85mm, Φ2=0.60mm, Φ3=0.80mm, and Φ4=1.00mm respectively.

[0049] Furthermore, the present invention also provides an improvement based on a single-layer microchannel heat exchange component, see Figure 4 The structure diagram of the multi-layer microchannel heat exchange component provided by the embodiment of the present invention is shown. Specifically, the single-layer microchannel heat exchange component provided by the present invention can be stacked, so that the heat exchange effect of the present invention is further improved.

[0050] In order to make the concept of the present invention more intuitive, please refer to Figure 5 Shown is a schematic diagram of the working principle of a microchannel heat exchange component provided by an embodiment of the present invention.

[0051] Specifically, after the fluid enters the fluid channel 3, it will pass through the starfish array. Due to the staggered arrangement of the first starfish array and the second starfish array, the fluid is diverted multiple times and then reflowed multiple times after passing through the "inverted" flow separation and combination structure, thereby strengthening the flow disturbance effect of the fluid and further improving the heat dissipation performance of the present invention. At the same time, any diversion at the starfish element 11 will produce a "diversion island" effect, and at the concave arc of the web 113 structure, due to the centrifugal effect, "eddy flow phenomenon" and "secondary flow phenomenon" are generated, so that the velocity distribution of the fluid originally in the laminar state is destroyed when passing through the web 113, the streamline rotates, and then the boundary layer of the fluid is destroyed, the turbulent effect of the fluid is strengthened, and the heat dissipation effect of the present invention is greatly enhanced.

[0052] Further, in order to further explain the structure of each starfish element 11, please refer to Figure 6 It is a schematic diagram of the arc angle A, the upper arc angle B and the lower arc angle C provided in an embodiment of the present invention.

[0053] Specifically, the end of the arm 112 of any starfish element 11 presents an arc angle A, wherein the value range of A is 145° to 160°, which can effectively reduce the fluid resistance when the fluid flows through the arm.

[0054] Furthermore, the upper arc angle of the concave arc is B, and the lower arc angle is C, wherein the value range of B is 75° to 80°, and the value range of C is 65° to 70°.

[0055] It is worth noting that when the fluid passes through the concave arc, due to the structural design of the upper arc angle B and the lower arc angle C, the fluid will generate "eddy flow phenomenon" and "secondary flow phenomenon" at the concave arc, thereby improving the heat dissipation efficiency of the fluid.

[0056] In some embodiments, the starfish element 11 provided by the present invention further includes an internal circulation channel 115, see Figure 7 FIG. 1 is a schematic diagram of a circulation channel 115 provided in an embodiment of the present invention.

[0057] Specifically, the interior of the native sea star includes complex structures such as radial water pipes, annular water pipes and branch water pipes. Based on this, the present invention is structurally modified to be a circulation channel 115, which includes a central annular channel 1151 and a drainage channel 1152 that is radially symmetrical outward along the outer periphery of the annular channel 1152. When the fluid passes through any arm 112, it will enter the drainage channel 1152, then pass through the annular channel 1151, and then flow out from another drainage channel 1152, thereby simulating the internal circulation structure of the native sea star, and further achieving the purpose of improving the heat dissipation effect. Specifically, the circulation channel 115 simulates and simplifies the pipeline structure inside the native sea star, which is used to make the heat dissipation effect of the present invention better.

[0058] Further, in order to illustrate the technical effects of the present invention, please refer to Figure 8 Shown is a schematic structural diagram of a ladder-type (8a) and a gill-type (8b) microchannel heat exchange component in the prior art provided by an embodiment of the present invention.

[0059] Specifically, each element in the ladder-shaped microchannel heat exchange component is a ladder-shaped structure, while the fish gill-shaped microchannel heat exchange component is formed in the shape of a fish gill.

[0060] For further information, see Fig. 9 The figure shows an experimental temperature cloud diagram of a microchannel heat exchange component provided by an embodiment of the present invention. The present invention conducts a comparative experiment through fluid to test the heat exchange performance and pressure drop performance of the microchannel heat exchange component based on starfish bionics.

[0061] Specifically, the fluid material is liquid water with a density of 998.2 kg / m 3, thermal conductivity is 0.6W / (m·k), constant pressure heat capacity is 4182J / (kg·k), dynamic viscosity is 0.001Pa·s, heat exchange plate material is aluminum, density is 2719kg / m 3 , thermal conductivity is 202.4W / (m·k), and constant pressure heat capacity is 871J / (kg·k). The finite element method is used to solve the continuity equation, momentum transfer equation, and heat equation under steady-state conditions, and the SIMPLE algorithm is used to calculate the pressure and velocity equations. Momentum and energy are discretized using second-order upwind discretization, and the maximum continuity, momentum, and energy residuals are 10 -5 , 10 -5 and 10 -8 The cold fluid inlet velocity is 0.1m / s, the cold fluid inlet temperature is 20℃, and the heat exchange surface is set to 80℃ in the isothermal domain, which means that the heat exchange surface temperature is always constant at 80℃. The heat transfer performance is judged by comparing the cold fluid outlet temperature. The higher the cold fluid outlet temperature represents the stronger heat transfer performance. The pressure drop of the microchannel is judged by comparing the pressure difference between the inlet and outlet of the cold fluid. The lower the pressure drop between the inlet and outlet of the cold fluid, the lower the flow resistance of the cold fluid in the microchannel.

[0062] Combined with reference Figure 10-12 ( Figure 8 The temperature cloud diagram of the comparative experiment of the ladder-type (8a) and gill-type (8b) microchannel heat exchange components provided in the embodiment of the present invention is shown. Fig.11 The figure shows a comparative experimental diagram of the temperature rise of the cold fluid in each microchannel heat exchanger provided in the embodiment of the present invention. Fig.12 1 is a comparative experimental diagram of the pressure drop of each microchannel heat exchanger provided in an embodiment of the present invention).

[0063] Based on the above diagram:

[0064] Embodiment: The temperature rise of a microchannel heat exchange component provided by the present invention is 24.115°C, and the pressure drop of the cold fluid inlet and outlet is 23.151Pa;

[0065] Comparative Example 1: When a ladder-shaped microchannel heat exchange component is used, the outlet temperature rise of the cold fluid is 17.611°C, and the inlet and outlet pressure drop of the cold fluid is 32.765Pa;

[0066] Comparative Example 2: When using a fish gill type microchannel heat exchange component, the temperature rise of the cold fluid outlet is 23.43℃; Fig.10 As shown, the inlet and outlet pressure drop of the cold fluid is 88.162Pa.

[0067] In summary, the microchannel heat exchange component provided by the present invention has excellent heat exchange performance and better pressure drop effect.

[0068] A microchannel heat exchange component is used in an electronic chip. Specifically, the present invention applies the microchannel heat exchange component to an electronic chip or an integrated circuit for heat dissipation of the electronic chip or the integrated circuit so that the microchannel heat exchange component can be integrally packaged.

[0069] The above shows and describes the basic principles, main features and advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited by the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the framework and scope of application of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention to be protected. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A microchannel heat exchange component, characterized in that: The invention comprises a base plate (1), a cover plate (2) being mounted on the base plate (1), a fluid channel (3) being formed between the cover plate (2) and the base plate, a starfish element (11) being arranged in a convex manner being arranged in the fluid channel, and a plurality of groups of the starfish elements (11) being arranged, the plurality of groups of the starfish elements (11) being connected to the base plate, and the starfish elements (11) in adjacent rows or columns being arranged in a staggered manner, the starfish elements (11) comprising a central plate (111), two groups of the starfish elements (11) in the same row or column and the starfish elements (11) in the adjacent row or column between the two groups of the starfish elements (11) forming three vertices of an equilateral triangle in space.

2. A microchannel heat exchange component according to claim 1, characterized in that: Arms (112) are radiated outward from the periphery of the central disk, and the arms (112) are provided in a plurality of groups, with webs (113) provided between the plurality of groups of arms (112).

3. A microchannel heat exchange component according to claim 2, characterized in that: The starfish element (11) is further provided with a circulation channel (115), the circulation channel (115) being arranged in parallel with the central disk (111), the circulation channel (115) comprising an annular channel (1151), drainage channels (1152) being radially symmetrically distributed on the outer side of the annular channel (1151), and the drainage channels (1152) being provided with a plurality of groups, and the number of the drainage channels (1152) being adapted to the number of the arms (112).

4. A microchannel heat exchange component according to claim 2, characterized in that: The arm (112) is in the shape of an arched spine, and the diameter of the end of the arm close to the central disk (111) is smaller than the diameter of the end away from the central disk (111).

5. The microchannel heat exchange component according to claim 2, characterized in that: The arm (112) is provided with a first protrusion (1121), and the first protrusion (1121) is provided in a plurality of groups, and the sizes of the plurality of groups of first protrusions are arranged in sequence from small to large.

6. The microchannel heat exchange component according to claim 1, characterized in that: The central disk (111) is provided with second protrusions (1111), and the second protrusions (1111) are provided in a plurality of groups.

7. The microchannel heat exchange component according to claim 2, characterized in that: The arc angle of the end of the arm and foot is 145° to 160°.

8. The microchannel heat exchange component according to claim 2, characterized in that: The web is configured in a concave arc shape.

9. Use of a microchannel heat exchange component according to any one of claims 1 to 8 in an electronic chip.

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