A microchannel heat exchange component and its application

Abstract

The present invention proposes a microchannel heat exchange component and its application, which relates to the field of microelectronic heat dissipation technology. The microchannel heat exchange component includes a substrate, a cover plate is installed on the substrate, a fluid channel is formed between the cover plate and the substrate, and a starfish element is provided in the fluid channel in a raised manner. The starfish element is provided in several groups, and the several groups of starfish elements are all connected to the substrate. 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 the three vertices of an equilateral triangle in space. The present invention uses the marine organism starfish as a prototype to design a microchannel heat exchange component including a starfish array, and the staggered arrangement of the starfish elements in adjacent rows or columns improves the flow disturbance ability of the present invention on the fluid, thereby improving the heat dissipation ability of the present invention.

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 higher-quality electronic devices, their form factors are becoming increasingly smaller, and wearable and portable devices are becoming increasingly popular. Consequently, integrated circuits and microelectronic chips are becoming increasingly integrated and smaller, requiring the timely removal of heat generated by these chips. Consequently, microchannel heat exchangers for integrated circuits and microelectronic chips have emerged, offering advantages such as small size, light weight, compact structure, ease of 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 response to the above problems, the purpose of the present invention is to propose a microchannel heat exchange component and its application. This microchannel heat exchange component and its electronic chip have the advantages of strong flow disturbance ability, low fluid resistance and high heat dissipation efficiency, solving the problems existing in the prior art.

[0005] To achieve the objectives of the present invention, the present invention is implemented through the following technical solutions: a microchannel heat exchange component, comprising a substrate, a cover plate installed on the substrate, a fluid channel formed between the cover plate and the substrate, a starfish element arranged in a raised manner is provided in the fluid channel, and the starfish elements are 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 groups form the three vertices of an equilateral triangle in space.

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

[0007] A further improvement is that a circulation channel is also provided in the starfish element, the circulation channel is arranged parallel to the central disk, the circulation 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 several groups.

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

[0012] A further improvement is that the web is constructed in an inwardly 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 several "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 produces a "divergence island" effect through the starfish element, and produces "eddy current phenomenon" and "secondary flow phenomenon" due to centrifugal action at the concave arc of the web structure, so that the velocity distribution of the fluid originally in a laminar flow state is destroyed when passing through the web, the streamline rotates, and the boundary layer of the fluid is destroyed, thereby enhancing the turbulent effect of the fluid and greatly enhancing the heat dissipation effect of the present invention. At the same time, the "eddy current phenomenon" and "secondary flow phenomenon" generated by the fluid at the web can also effectively flush and clean the concave arc of the web, avoiding problems such as impurity adhesion, and improving 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 schematic diagram of the composition 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, upper arc angle B and 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] Figure 9 This is a temperature cloud diagram of the microchannel heat exchange component experiment of the present invention.

[0027] Figure 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] Figure 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] Figure 12 This is a comparative experimental diagram of the pressure drops of various microchannel heat exchangers 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. Belly; 115. Circulation channel; 1111. Second protrusion; 1121. First protrusion; 1151. Ring 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 with reference to the examples. The examples are only used to explain the present invention and do not constitute a limitation on the scope of protection of the present invention.

[0032] according to Figures 1-12As 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 convex manner, and the starfish element 11 is provided in a plurality of groups, and 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. 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 in microelectronics, solar energy, medical devices, aerospace, smart home appliances, smart cars and other technical fields that require the use of 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 disturbance separation and combination structure that generates disturbance. It is worth understanding that the starfish elements 11 on the two parallel lines of any adjacent first starfish array / second starfish array form a disturbance 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" disturbance separation and combination structures, and form multiplexing for any starfish element 11, thereby amplifying the efficacy of the disturbance separation and combination structure provided by the present invention, making the disturbance 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 theoretically also meet the requirements of the present invention.

[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 by an embodiment of the present invention.

[0041] Furthermore, the present invention improves the external structure of the starfish element 11 based on the appearance of the native marine organism starfish, further enhancing the flow disturbance effect of the present invention. Specifically, 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 adjacent arms 112 are connected by webs 113 with concave arcs. When a fluid flows through any starfish element 11, the starfish element 11 produces a "divergence island" effect, and at the concave arc of the web 113 structure, due to centrifugal action, "eddy current phenomenon" and "secondary flow phenomenon" are generated, thereby causing the fluid, which was originally in a laminar state, to have its velocity distribution destroyed and its streamlines rotated when passing through the web 113, thereby destroying the boundary layer of the fluid, strengthening the turbulent effect of the fluid, and greatly enhancing the heat dissipation effect of the present invention.

[0042] At the same time, the "eddy current 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 a "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 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. The "secondary flow phenomenon" means that if the flow along a boundary is subjected to lateral pressure and produces a deviation parallel to the boundary, the fluid layer close to the boundary will be more deflected 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 enhance the heat exchange efficiency of the fluid flowing through while effectively reducing the flow resistance, thereby achieving the effect of reducing pressure drop and reducing blockage.

[0045] Furthermore, from the central disk 111 toward the arms 112, the arms 112 include 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 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 = 0.85 mm, Φ2 = 0.60 mm, Φ3 = 0.80 mm, and Φ4 = 1.00 mm respectively.

[0049] Furthermore, the present invention also provides an improvement based on a single-layer microchannel heat exchange component, please refer to Figure 4 FIG2 is a schematic diagram of the structure of a multi-layer microchannel heat exchange assembly provided by an embodiment of the present invention. Specifically, the single-layer microchannel heat exchange assembly provided by the present invention can be stacked, thereby further improving the heat exchange effect of the present invention.

[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 entering the fluid channel 3, the fluid will pass through the starfish array. Due to the staggered arrangement of the first starfish array and the second starfish array, the fluid will be diverted multiple times and then re-flowed multiple times after passing through the "T-shaped" 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 starfish element 11 where the flow is diverted will produce a "diverter island" effect, and at the concave arc of the web 113 structure, due to centrifugal action, "eddy current phenomenon" and "secondary flow phenomenon" will be generated, so that the velocity distribution of the fluid originally in a laminar state will be destroyed when passing through the web 113, the streamline will rotate, and the boundary layer of the fluid will be destroyed, thereby strengthening the turbulent effect of the fluid and greatly enhancing the heat dissipation effect of the present invention.

[0052] Further, for further explanation of the structure of each starfish element 11, please refer to Figure 6 Schematic diagram of the arc angle A, upper arc angle B and 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 a native sea star includes a complex structure of radial, annular, and branched water pipes. The present invention accordingly restructures and configures a circulation channel 115, which includes a central annular channel 1151 and radially symmetrical drainage channels 1152 extending outward along the periphery of the annular channel 1152. When fluid passes through any arm 112, it enters the drainage channel 1152, then passes through the annular channel 1151, and then flows out of the other drainage channel 1152, thereby simulating the internal circulation structure of the native sea star and further achieving the purpose of improving heat dissipation. Specifically, the circulation channel 115 simulates and simplifies the internal piping structure of the native sea star, thereby enhancing the heat dissipation effect of the present invention.

[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 Figure 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 comparative experiments using fluids to test the heat exchange performance and pressure drop performance of the microchannel heat exchange component based on starfish biomimetic.

[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 continuity equation, momentum transfer equation, and heat equation under steady-state conditions are solved using the finite element method, and the pressure and velocity equations are calculated using the SIMPLE algorithm. Momentum and energy are discretized using a second-order upwind discretization, with maximum continuity, momentum, and energy residuals of 10 -5 , 10 -5 and 10 -8 The cold fluid inlet velocity is 0.1 m / s, the cold fluid inlet temperature is 20°C, and the heat exchange surface is set to an isothermal domain of 80°C, which means that the heat exchange surface temperature is always constant at 80°C. The heat transfer performance is judged by comparing the cold fluid outlet temperature. The higher the cold fluid outlet temperature, the stronger the heat transfer performance. The pressure drop of the microchannel is judged by comparing the pressure difference between the cold fluid inlet and outlet. The lower the pressure drop between the cold fluid inlet and outlet, the lower the flow resistance of the cold fluid in the microchannel.

[0062] See also Figure 10-12 ( Figure 8 The figure shows the temperature cloud diagram of the comparative experiment of the ladder-type (8a) and gill-type (8b) microchannel heat exchange components provided by the embodiment of the present invention. Figure 11 The figure shows a comparative experimental diagram of the temperature rise of the cold fluid in each microchannel heat exchanger provided by the embodiment of the present invention. Figure 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] Example: 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 the fish gill type microchannel heat exchange component, the outlet temperature of the cold fluid rises to 23.43℃; Figure 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 the electronic chip or integrated circuit for heat dissipation of the electronic chip or integrated circuit, so that the electronic chip or integrated circuit can be packaged as a whole.

[0069] The basic principles, main features, and advantages of the present invention are shown and described above. Those skilled in the art should understand that the present invention is not limited to the above-described embodiments. The above-described embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and improvements may be made to the present invention without departing from the framework and scope of application of the present invention. Such changes and improvements are intended to fall within the scope of the present invention. The scope of protection claimed in the present invention is defined by the appended 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 provided in the fluid channel, and a plurality of groups of the starfish elements (11) being provided, 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 disk (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 located therebetween forming three vertices of an equilateral triangle in space.

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

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

4. The microchannel heat exchange assembly 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 assembly 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 order from small to large.

6. The microchannel heat exchange assembly 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 assembly according to claim 2, characterized in that: The arc angle of the end of the tentacles is 145° to 160°.

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

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

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