Cross turbulent flow composite micro-channel heat exchanger
By designing cross-spoiler structures in microchannel heat exchangers and using phase change materials and fans, the problem of reducing heat transfer efficiency caused by bubble enrichment is solved, and more efficient heat transfer performance is achieved.
Patent Information
- Application Number
- CN202520547441.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-27
- Publication Date
- 2025-05-16
- Estimated Expiration
- 2035-03-27
AI Technical Summary
When the existing microchannel heat exchanger circulates the heat exchange medium, it cannot effectively handle the enrichment of internal bubbles, resulting in a decrease in heat transfer efficiency.
A composite microchannel heat exchanger with cross-spoiler is designed to increase the frequency of fluid disturbance and bubble disengagement by setting up partitions, grooves and spoiler barriers between the upper and lower heat exchange layers, and use phase change materials and fans in the medium cooling section to improve heat dissipation effect.
The heat exchange efficiency is effectively improved, and by increasing the heat exchange area, increasing the fluid disturbance and bubble disengagement frequency, the bubble enrichment problem is solved and the heat transfer performance in the tiny space is improved.
Smart Images
Figure CN222881761U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of heat exchangers, in particular to a composite microchannel heat exchanger with cross-flow disturbance. Background Art
[0002] With the continuous development and growth of electronic equipment technology, various microelectronics and micro-energy systems are constantly miniaturized. The number of electronic components in the same volume is increasing, the volume is getting smaller, and the density is getting larger. Therefore, the heat flux density is also increasing, and the requirements for heat exchange are getting higher and higher. This leads to the continuous development of its cooling device towards miniaturization to ensure the normal operation of micro-electric devices. Traditional heat exchangers achieve heat exchange by direct contact between heat exchange materials and objects, which makes it difficult to achieve efficient heat exchange and heat exchange of tiny components. On this basis, in view of the excessively high local temperature and uneven distribution of microelectronic components, as well as the rise and development of micro-scale devices and their cooling devices, higher demands are put forward for enhanced heat transfer technology in small spaces.
[0003] In this context, microchannel heat exchangers came into being. Microchannel heat exchangers have the characteristics of small channel size, which greatly increases their heat exchange area compared to traditional heat exchangers and can significantly improve heat exchange efficiency. Its compact structural design is also more suitable for the limited space layout requirements of data processing equipment and related instruments and devices. In actual application, for high-power density microelectronic components or micro energy systems (such as chips, LED modules, micro batteries, etc.), these devices generate a lot of heat when working. The external pipeline is arranged in a multi-segment S shape on the corresponding heat dissipation equipment. The external pipeline is filled with heat exchange medium, and the heat exchange medium can exchange heat with the equipment. The external pipeline circulation line is set, and the microchannel heat exchanger is set on the circulation path of the external pipeline to realize the heat dissipation operation of the heat exchange medium. Subsequently, through the circulation of the heat exchange medium, the heat exchange operation of the heat dissipation equipment is finally realized. However, when the existing heat exchanger performs the circulation heat exchange of the heat exchange medium, it cannot effectively deal with the enrichment of internal bubbles, and the heat transfer efficiency is easily affected by the bubbles in the heat exchange medium fluid.
[0004] To this end, we propose a cross-turbulence composite microchannel heat exchanger to solve the above problems. Utility Model Content
[0005] The utility model aims to solve the shortcomings in the prior art and proposes a composite microchannel heat exchanger with cross-turbulence.
[0006] In order to achieve the above purpose, the utility model adopts the following technical solutions:
[0007] A cross-turbulent composite microchannel heat exchanger comprises an upper heat exchange layer and a lower heat exchange layer, the upper heat exchange layer and the lower heat exchange layer are arranged in parallel, two cubic shells are fixedly connected between the upper heat exchange layer and the lower heat exchange layer, a plurality of partitions are arranged between the two cubic shells, and a medium cooling section is connected between the upper heat exchange layer and the lower heat exchange layer;
[0008] The upper heat exchange layer and the lower heat exchange layer are both provided with a cavity, and a plurality of heat exchange plates are provided inside the cavity, and the plurality of heat exchange plates divide the cavity into multiple sections of S-shaped channels, and a plurality of grooves are provided on one side of the multiple sections of S-shaped channels close to the partition plate;
[0009] A number of flow blocking columns are arranged alternately on both sides of the heat exchange plate.
[0010] Preferably, the plurality of partitions are arranged at equal distances, and two ends of the plurality of partitions are fixedly connected to the upper heat exchange layer and the lower heat exchange layer respectively, and the surfaces of the partitions are hollowed out.
[0011] Preferably, the partition is provided with a plurality of triangular holes.
[0012] Preferably, the cross section of the groove is an isosceles triangle.
[0013] Preferably, the spoiler baffle is in the shape of a quadrangular prism.
[0014] Preferably, the medium cooling section includes a pipeline, both ends of which are respectively connected to the cavities of the upper heat exchange layer and the lower heat exchange layer, and the pipeline passes through two cubic shells respectively. The cubic shells are provided with openings, and the pipeline can pass through the openings. The two cubic shells are filled with phase change materials.
[0015] Preferably, a liquid inlet communicating with the cavity is installed on the side of the upper heat exchange layer, and a liquid outlet communicating with the cavity is installed on the side of the lower heat exchange layer.
[0016] Preferably, the upper heat exchange layer, the lower heat exchange layer and the plurality of partitions are all made of nickel material.
[0017] Compared with the prior art, the beneficial effects of the utility model are:
[0018] The utility model is provided with an upper heat exchange layer and a lower heat exchange layer, a medium cooling section and a partition. The upper heat exchange layer and the lower heat exchange layer can significantly increase the heat exchange area by exchanging heat simultaneously, and effectively improve the heat exchange efficiency. Heat exchange plates and corresponding spoiler baffles are arranged inside the upper heat exchange layer and the lower heat exchange layer, which can effectively improve the disturbance of the fluid. The grooves provided can increase the growth rate and the separation frequency of the bubbles. At the same time, the arrangement of the cross spoiler baffles increases the heat exchange process while increasing the disturbance of the fluid, and also plays a role in increasing the growth rate and the separation frequency of the bubbles. At the same time, phase change materials and fans are added to improve the heat dissipation effect, so as to achieve the purpose of enhancing heat transfer and ultimately improve the heat exchange efficiency from many aspects. BRIEF DESCRIPTION OF THE DRAWINGS
[0019] In order to more clearly illustrate the technical solutions in the embodiments of the utility model or the prior art, the drawings required for use in the embodiments or the prior art description are briefly introduced below. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.
[0020] Figure 1 It is the first axonometric drawing of the utility model;
[0021] Figure 2 It is the second axonometric drawing of the utility model;
[0022] Figure 3 It is a schematic diagram of the structure inside the inner cavity of the upper heat exchange layer of the utility model;
[0023] Figure 4 It is a schematic diagram of the structure of the spoiler baffle column and the heat exchange plate of the utility model;
[0024] Figure 5 It is a cross-sectional schematic diagram of the spoiler baffle column and the groove of the utility model;
[0025] Figure 6 It is a structural schematic diagram of the pipeline of the utility model;
[0026] Figure 7 It is a structural schematic diagram of the cubic shell of the utility model.
[0027] In the figure: 1, liquid inlet; 2, liquid outlet; 3, upper heat exchange layer; 4, lower heat exchange layer; 5, medium cooling section; 501, pipeline; 6, partition; 7, groove; 8, cubic shell; 801, opening; 9, spoiler column; 10, heat exchange plate. DETAILED DESCRIPTION
[0028] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0029] In the description of the present invention, it should be understood that the terms "opening", "upper", "lower", "thickness", "top", "middle", "length", "inside", "all around" and the like indicating orientation or positional relationship are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the components or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.
[0030] Reference Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 as well as Figure 7 A cross-turbulent composite microchannel heat exchanger includes an upper heat exchange layer 3 and a lower heat exchange layer 4, which are arranged in parallel up and down, and two cubic shells 8 are fixedly connected between the upper heat exchange layer 3 and the lower heat exchange layer 4, that is, a gap is provided between the upper heat exchange layer 3 and the lower heat exchange layer 4, and the two cubic shells 8 are located between the gaps. A plurality of partitions 6 are provided between the two cubic shells 8, and a medium cooling section 5 is connected between the upper heat exchange layer 3 and the lower heat exchange layer 4.
[0031] The specific operation is that the heat exchange medium passes into the upper heat exchange layer 3, and after the heat exchange medium completes the heat exchange in the upper heat exchange layer 3, it enters the medium cooling section 5 to complete the cooling of the heat exchange medium, and enters the lower heat exchange layer 4 for further heat exchange operation in the lower layer.
[0032] For the above example, those skilled in the art should know that when implementing the above technical solution, the size of the upper heat exchange layer 3 and the lower heat exchange layer 4 is set to a rectangular parallelepiped with a length of 60 mm, a width of 60 mm, and a height of 10 mm.
[0033] For the above example, those skilled in the art should know that when implementing the above technical solution, the partition 6 can be set to have a length of 52 mm and a width of 1 mm.
[0034] As a technical optimization solution of the utility model, a plurality of partitions 6 are arranged at equal distances, and the two ends of the plurality of partitions 6 are respectively fixedly connected to the upper heat exchange layer 3 and the lower heat exchange layer 4, the surface of the partition 6 is hollowed out, and the partition 6 is provided with a plurality of triangular holes. The plurality of triangular holes can increase the air heat dissipation surface.
[0035] The upper heat exchange layer 3 and the lower heat exchange layer 4 are both provided with cavities, and a plurality of heat exchange plates 10 are provided inside the cavities. The plurality of heat exchange plates 10 divide the cavities into multiple sections of S-shaped channels, and a plurality of grooves 7 are provided on one side of the multiple sections of S-shaped channels close to the partition 6, and the cross section of the groove 7 is an isosceles triangle. The groove 7 has the effect of expanding the geometric shape of the heat exchange surface, increasing the heat exchange area with the heat exchange medium fluid, and can disturb the fluid, thereby increasing the growth rate and separation frequency of bubbles in the heat exchange medium.
[0036] For the above example, those skilled in the art should know that when implementing the above technical solution, the groove 7 has a depth of 0.5 mm, a width of 2 mm, and a length of 2 mm. Twelve grooves 7 can be arranged between every two heat exchange plates 10, and the shape of the groove 7 is not limited to an isosceles triangle, but can also be arranged to be a semicircular arc, etc.
[0037] For the above example, those skilled in the art should know that when implementing the above technical solution, the heat exchange plate 10 can be set to be 1 mm wide and 10 mm high, and 9 heat exchange plates 10 can be arranged equidistantly.
[0038] As a technical optimization solution of the utility model, both sides of the heat exchange plate 10 are staggeredly arranged with a plurality of spoiler baffles 9, and the spoiler baffles 9 are in the shape of a quadrangular prism. A plurality of spoiler baffles 9 are arranged in a matrix, and the spoiler baffles 9 adjacent to each other are staggered. Figure 5 As shown. The function of the flow-turbulating baffle 9 is to increase the disturbance of the heat exchange medium fluid, increase the heat exchange process, and the disturbance of the fluid increases the growth rate and separation frequency of the bubbles. That is, the grooves 7 and the flow-turbulating baffle 9 can disturb the heat exchange medium fluid, so that the tiny bubbles are disturbed, separated, collided and enriched to form large bubbles. The large bubbles are more easily carried away by the heat exchange medium fluid than the small bubbles, that is, the bubble separation frequency is increased.
[0039] For the above example, those skilled in the art should know that when implementing the above technical solution, a total of 15 spoiler columns 9 are arranged between every two heat exchange plates 10, the spacing between the two heat exchange plates 10 is 4 mm, the spoiler columns 9 are 1.7 mm long, 1.2 mm wide, and 3 mm high.
[0040] Specific reference Figure 6 and Figure 7 The medium cooling section 5 includes a pipeline 501, both ends of which are respectively connected to the cavities of the upper heat exchange layer 3 and the lower heat exchange layer 4, and the pipeline 501 passes through two cubic shells 8 respectively. The cubic shells 8 are provided with openings 801, and the pipeline 501 can pass through the openings 801. The two cubic shells 8 are filled with phase change materials.
[0041] As a technical optimization scheme of the utility model, an existing exhaust valve can be installed on the pipe 501 for circulating the heat exchange medium, and the exhaust valve can be used to discharge the enriched bubbles. The main structure is to install a cavity at a certain position above the pipe 501. The cavity does not affect the use of the pipe 501. When the bubbles pass through the cavity, they can enter the cavity through their own buoyancy and be blocked and retained. The exhaust valve is installed above the cavity, and the bubbles in the cavity can be discharged subsequently through the exhaust valve. The main operation is to squeeze and discharge the bubbles by opening the exhaust valve and replenishing the heat exchange medium when the heat exchange medium stops circulating.
[0042] For the above examples, those skilled in the art should know that when implementing the above technical solution, the phase change material is a functional material that realizes energy storage and temperature regulation by absorbing or releasing a large amount of latent heat during the phase change process of the material. The phase change material of the present application may be paraffin.
[0043] As a technical optimization solution of the present invention, multiple fans can be installed on the side of the present application, that is, the present application is set on the corresponding equipment, the corresponding equipment is the required heat dissipation equipment, and multiple fans are installed on the corresponding equipment. The multiple fans are located on the side of the present application. The purpose of the fan is to assist the phase change material and the partition 6 in heat dissipation, and heat dissipation can be achieved through thermal convection, which can increase the heat dissipation effect.
[0044] As a technical optimization solution of the utility model, a liquid inlet 1 communicating with the inner cavity is installed on the side of the upper heat exchange layer 3, and a liquid outlet 2 communicating with the inner cavity is installed on the side of the lower heat exchange layer 4.
[0045] For the above example, those skilled in the art should know that when implementing the above technical solution, the liquid inlet 1 and the liquid outlet 2 are connected to the external pipeline, that is, the corresponding heat dissipation equipment generates a large amount of heat when working, and the external pipeline is arranged on the equipment in a multi-segment S shape. The external pipeline is filled with a heat exchange medium, and the heat exchange medium can exchange heat with the equipment. The external pipeline circulation line is set, and the external pipeline is respectively connected to the liquid inlet 1 and the liquid outlet 2, that is, the present application is arranged on the circulation path of the external pipeline to realize the heat dissipation operation of the heat exchange medium, and then through the circulation of the heat exchange medium, the heat exchange operation of the equipment to be dissipated is finally realized.
[0046] The heat exchange medium inside the external pipeline is circulated through natural convection or an external pump group. The external pipeline can be sampled with a metal hose (such as a stainless steel bellows) to adapt to complex environments. The external pipeline can also be equipped with a flow control valve and a temperature sensor to monitor the medium flow rate and temperature in real time and optimize the heat exchange efficiency.
[0047] The upper heat exchange layer 3, the lower heat exchange layer 4 and several partitions 6 are all made of nickel material, that is, the overall structure of the upper heat exchange layer 3 and the lower heat exchange layer 4 and several partitions 6 are all made of nickel material. The heat transfer performance per unit volume of nickel material is higher than that of the heat exchanger made of corresponding polymer material, and the heat transfer performance per unit mass is improved.
[0048] In the present utility model, the working principle of the heat exchanger is as follows:
[0049] The heat exchange medium enters the upper heat exchange layer 3 from the liquid inlet 1, and enters a plurality of heat exchange plates 10 in the cavity to form a plurality of S-shaped channels. After completing the heat exchange in the upper layer, the heat exchange medium passes through the pipe 501 of the medium cooling section 5. The pipe 501 passes through two cubic shells 8 respectively, and the heat exchange medium is cooled again. Then, the heat exchange medium enters the lower heat exchange layer 4, and enters a plurality of heat exchange plates 10 in the cavity to form a plurality of S-shaped channels. The heat exchange in the lower layer is completed, and then the heat exchange in the lower layer is completed. Finally, the heat exchange operation of the lower layer is completed.
[0050] In the above operation, the triangular holes of the partition 6 can effectively increase the air heat dissipation surface, and the phase change material can also absorb and dissipate heat. If the interference flow baffle column 9 can increase the disturbance of the heat exchange medium fluid, the heat exchange process is increased, and the disturbance of the fluid plays a role in increasing the growth rate and separation frequency of the bubbles. The grooves 7 play a role in expanding the geometric shape of the heat exchange surface, increasing the heat exchange area with the heat exchange medium fluid, and can increase the growth rate and separation frequency of the bubbles in the heat exchange medium.
[0051] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.
Claims
1. A cross-turbulent composite microchannel heat exchanger, characterized in that: The heat exchange device comprises an upper heat exchange layer (3) and a lower heat exchange layer (4), the upper heat exchange layer (3) and the lower heat exchange layer (4) being arranged in parallel up and down, two cubic shells (8) being fixedly connected between the upper heat exchange layer (3) and the lower heat exchange layer (4), a plurality of partitions (6) being arranged between the two cubic shells (8), and a medium cooling section (5) being connected between the upper heat exchange layer (3) and the lower heat exchange layer (4); The upper heat exchange layer (3) and the lower heat exchange layer (4) are both provided with a cavity, and a plurality of heat exchange plates (10) are provided inside the cavity, the plurality of heat exchange plates (10) divide the cavity into a plurality of sections of S-shaped channels, and a plurality of grooves (7) are provided on one side of the plurality of sections of the S-shaped channels close to the partition plate (6); A number of flow blocking columns (9) are arranged in a staggered manner on both sides of the heat exchange plate (10).
2. A cross-turbulence composite microchannel heat exchanger according to claim 1, characterized in that: The plurality of partitions (6) are arranged at equal distances, and two ends of the plurality of partitions (6) are respectively fixedly connected to the upper heat exchange layer (3) and the lower heat exchange layer (4), and the surface of the partitions (6) is hollowed out.
3. The cross-turbulence composite microchannel heat exchanger according to claim 1, characterized in that: The partition plate (6) is provided with a plurality of triangular holes.
4. The cross-turbulence composite microchannel heat exchanger according to claim 1, characterized in that: The cross section of the groove (7) is an isosceles triangle.
5. The cross-turbulence composite microchannel heat exchanger according to claim 1, characterized in that: The spoiler baffle column (9) is in the shape of a quadrangular prism.
6. The cross-flow composite microchannel heat exchanger according to claim 1, characterized in that: The medium cooling section (5) comprises a pipeline (501), the two ends of the pipeline (501) are respectively connected to the cavities of the upper heat exchange layer (3) and the lower heat exchange layer (4), and the pipeline (501) passes through two cubic shells (8), the cubic shells (8) are provided with openings (801), and the pipeline (501) can pass through the openings (801), and the two cubic shells (8) are filled with phase change materials.
7. The cross-turbulence composite microchannel heat exchanger according to claim 1, characterized in that: The upper heat exchange layer (3) is provided with a liquid inlet (1) connected to the cavity on its side, and the lower heat exchange layer (4) is provided with a liquid outlet (2) connected to the cavity on its side.
8. The cross-flow composite microchannel heat exchanger according to claim 1, characterized in that: The upper heat exchange layer (3), the lower heat exchange layer (4) and the plurality of partitions (6) are all made of nickel material.