A multi-surface area liquid cold plate and design method

Abstract

The application discloses a multi-surface-area liquid cooling plate and a design method, comprising a liquid cooling plate and a plurality of heat exchange plates arranged on the liquid cooling plate; a plurality of grooves are formed on the liquid cooling plate and matched with the plurality of heat exchange plates one by one; a cooling water channel is arranged in the liquid cooling plate, and the water inlet and the water outlet of the cooling water channel are located on the same side of the liquid cooling plate; the liquid cooling plate has the advantages of no condensation, low pressure drop, good heat dissipation effect, light weight, small size, elimination of design bottlenecks in the design and development of high-grade products, and quick response to market demand; and the application can be widely applied to fields including high-power inverter welding machines, WAAM (Wire Arc Additive Manufacturing), aerospace, integrated circuits, consumer electronics, communication systems, high-power power conversion, photovoltaic solar energy, semiconductor lighting, lasers and the like.

Description

Technical Field

[0001] This invention relates to the field of heat dissipation in welding machines, and particularly to a multi-surface area liquid cooling plate and its design method. Background Technology

[0002] Currently, the conventional heat dissipation method for high-power inverter arc welding machines on the market is the air-cooled cooling system. This system forms a forced convection air cooling system by increasing the surface area of ​​the aluminum alloy heat sink fins and increasing the fan speed. Its disadvantages are as follows: the heat dissipation effect is not as good as liquid cooling, especially for electrical components with localized extremely high heat flux density; the welding machine is noisy; the welding machine is relatively large; the welding machine is relatively heavy; dust can easily accumulate in the internal fan during long-term operation, thus affecting the welding machine's efficiency; and the internal temperature rises sharply under continuous load for a long time, affecting the service life of the welding machine.

[0003] There are also liquid-cooled aluminum alloy heat dissipation systems, but their disadvantages are as follows: The liquid cooling plate uses a pump to drive coolant through channels on the back of the chip. Heat exchange occurs between the coolant, the aluminum alloy liquid cooling plate, and the chip, carrying away the chip's heat. Because the coolant temperature is low, condensation may occur at the liquid cooling inlet when the coolant enters the channels. Condensation refers to the phenomenon where, when the air is saturated with water vapor, if the ambient temperature continues to drop, or the surface temperature of the equipment falls below the dew point temperature of the surrounding air, the supersaturated water vapor in the air begins to condense and separate into water.

[0004] When condensation forms water droplets that adhere to the surface of equipment, it will accelerate the corrosion of the equipment. On the other hand, it will affect the flow or block the pressure-inducing pipe in the gas phase pipeline. Condensation will not only cause corrosion and other problems to the liquid cooling plate material, but long-term condensation may also breed bacteria and may even cause more serious problems such as short circuits to the electronic components it cools.

[0005] Existing anti-condensation methods mostly employ dehumidification, air blowing, surface heating, and coatings. However, dehumidification, air blowing, and surface heating methods require the installation of additional equipment such as dehumidifiers, fans, or electric heaters, while coating methods generally have limited anti-condensation effectiveness, with condensation still appearing on the coated surface when air humidity is high. Some anti-condensation devices based on liquid-cooled plate heat equalization use partitions to divide the liquid-cooled plate into hot water and cold water channels, and allow the heated coolant in the cold water channel to flow back to the hot water channel, increasing the temperature of the wall surface of the liquid-cooled plate in contact with the environment and preventing condensation. These technologies suffer from problems such as complex structure, large size, heavy weight, and limited improvement in heat dissipation performance. Summary of the Invention

[0006] This invention provides a multi-surface area liquid cooling plate and its design method, which can at least solve one of the problems mentioned in the background art.

[0007] A multi-surface area liquid cooling plate includes a liquid cooling plate and a plurality of heat exchange plates disposed on the liquid cooling plate;

[0008] The liquid cooling plate has several grooves that mate with several heat exchange plates.

[0009] The liquid cooling plate is equipped with cooling water channels, and the inlet and outlet of the cooling water channels are located on the same side of the liquid cooling plate.

[0010] The liquid cooling plate has a hollow structure.

[0011] The liquid cooling plate includes cooling channels and multiple sub-units arranged in a matrix, with the multiple sub-units covering the cooling channels.

[0012] The sub-unit is a spherical shell structure with through holes, and the gaps between four adjacent sub-units form ventilation channels that pass through the liquid cooling plate.

[0013] Preferably, the heat exchange plate is a copper plate.

[0014] A design method for a multi-surface area liquid-cooled plate includes the following steps:

[0015] S1. Based on 3D modeling software, various liquid cooling plate components are established, and finite element simulation analysis is performed to select the best multi-surface area liquid cooling plate scheme.

[0016] S2. Based on 3D modeling software, establish the complete machine model of the optimal multi-surface liquid cooling plate with different sizes, and perform finite element simulation analysis to select the multi-surface liquid cooling plate scheme with the best comprehensive performance.

[0017] S3. Based on additive design software, an implicitly modeled multi-surface liquid cooling plate model of the same size was designed.

[0018] In step S3, the filling type of the multi-surface area liquid cooling plate model is one of Gyroid, Schwarz, Diamond, Lidinoid, Splitp, and Neovius.

[0019] A welding machine includes a multi-surface area liquid cooling plate, a housing, and several electrical components. The housing has a through hole, and a waterproof and breathable membrane is disposed inside the through hole.

[0020] Compared with the prior art, the beneficial effects of the present invention are as follows: The present invention provides a multi-surface area liquid cooling plate for high-power inverter welding machines, which has the advantages of no condensation, low pressure drop, good heat dissipation, light weight, small size, elimination of design bottlenecks in advanced product design and development, and rapid response to market demands. The invention can be widely used in fields including high-power inverter welding machines, WAAM arc additive manufacturing, aerospace, integrated circuits, consumer electronics, communication systems, high-power power conversion, photovoltaic solar energy, semiconductor lighting, and lasers.

[0021] Its wide range of applications is mainly reflected in the further elimination of geographical bottlenecks, such as areas with high altitude, high air pressure, large geographical latitude, and harsh temperature and humidity climate, due to its advantage of liquid cooling pressure reduction. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of a multi-surface-area liquid cooling plate.

[0023] Figure 2 Flowchart for the design of multi-surface area liquid cooling plates;

[0024] Figure 3 The numerical parameter diagram of the finite element simulation of a conventional aluminum alloy liquid cooling plate;

[0025] Figure 4 The numerical parameter diagram of the finite element simulation of the conventional aluminum alloy liquid cooling plate combined with copper tubes;

[0026] Figure 5 The finite element simulation numerical parameter diagram of a multi-surface area liquid cooling plate with dimensions L500mmX250mmX30mm;

[0027] Figure 6 The numerical parameter diagram of the finite element simulation of a multi-surface area liquid cooling plate with dimensions L300mmX250mmX30mm;

[0028] Figure 7 A comparison chart of numerical parameters from finite element simulations of various liquid cooling plates;

[0029] Figure 8 This is a schematic diagram of the internal structure of the welding machine;

[0030] Figure 9 This is a numerical parameter diagram of the finite element simulation of the welding machine.

[0031] Explanation of reference numerals in the attached figures:

[0032] 1. Welding machine housing; 2. Capacitor; 3. 36V power supply board; 4. Liquid cooling pump; 5. Liquid cooling box; 6. Inductor coil; 7. IGBT-1 module (1000W); 8. Waterproof and breathable membrane; 9. Current transformer (20W); 10. IGBT-3 module (100W); 11. IGBT-2 (500W) module; 12. 24V power supply board; 13. IGBT-4 module (100W); 14. IGBT-5 module (500W); 15. IGBT-6 module (1000W); 16. External control PCBA; 17. Welding machine internal support plate; 18. Liquid cooling plate; 19. M5X40 screws; 20. Heat exchange plate; 21. Cooling water channel; 22. Sub-unit. Detailed Implementation

[0033] The following detailed description of a specific embodiment of the present invention is provided in conjunction with the accompanying drawings. However, it should be understood that the scope of protection of the present invention is not limited to the specific embodiment.

[0034] Example 1

[0035] like Figure 1 As shown in the figure, an embodiment of the present invention provides a multi-surface area liquid cooling plate, including a liquid cooling plate 18 and a plurality of heat exchange plates 20 disposed on the liquid cooling plate 18. The liquid cooling plate 18 adopts a hollow structure, which has a larger surface area in the same volume compared with existing air cooling and liquid cooling heat dissipation methods, and can achieve higher heat dissipation efficiency under the same conditions. The heat exchange plates 20 are made of copper plates, which have higher heat exchange efficiency. In addition, in order to further increase the surface area, the liquid cooling plate 18 is provided with a plurality of grooves that respectively mate with the plurality of heat exchange plates 20.

[0036] The liquid cooling plate 18 is provided with a cooling water channel 21. The inlet and outlet of the cooling water channel 21 are located on the same side of the liquid cooling plate. Compared with the method of setting the inlet and outlet on opposite sides, this maximizes the length of the cooling water flow.

[0037] The hollow structure of the liquid cooling plate in this embodiment is specifically as follows: the liquid cooling plate 18 includes cooling water channels 21 and multiple sub-units 22 arranged in a matrix, and the multiple sub-units 22 cover the cooling water channels; the sub-units 22 are spherical shell structures with through holes, and the gaps between four adjacent sub-units 22 form ventilation channels that penetrate the liquid cooling plate 18; this design effectively improves airflow, makes the temperature near the heating element more uniform, and reduces or prevents the generation of condensation;

[0038] Example 2

[0039] like Figures 2-7 This embodiment proposes a design method for multi-surface area liquid-cooled plates, including the following steps:

[0040] S1. Based on 3D modeling software, various liquid cooling plate components are established, and finite element simulation analysis is performed to select the best multi-surface area liquid cooling plate scheme.

[0041] S2. Based on 3D modeling software, establish the complete machine model of the optimal multi-surface liquid cooling plate with different sizes, and perform finite element simulation analysis to select the multi-surface liquid cooling plate scheme with the best comprehensive performance.

[0042] S3. Based on additive design software, an implicitly modeled multi-surface liquid cooling plate model of the same size was designed.

[0043] In step S3, the infill type of the multi-surface area liquid cooling plate model is one of Gyroid, Schwarz, Diamond, Lidinoid, Splitp, and Neovius;

[0044] Figure 2 This is a flowchart of the design method in this embodiment;

[0045] In this embodiment, the multiple liquid cooling plate components established based on the 3D modeling software in step S1 are: conventional aluminum alloy liquid cooling plate component, conventional aluminum alloy liquid cooling plate & copper tube component, and metal 3D printed multi-surface liquid cooling plate component (two sizes, L500mmX250mmX30mm and L300mmX250mmX30mm respectively).

[0046] The finite element simulation analysis results are shown below. Figures 3 to 5 The specific analysis is as follows:

[0047] Please see Figure 3 A standard aluminum alloy liquid cooling plate assembly includes a liquid cooling plate, six IGBT modules with power ratings of 100W, 500W, 1000W, 1000W, 500W, and 500W on both sides of the liquid cooling plate, six copper plates between the liquid cooling plate and the IGBT modules, and thermal grease between the IGBT modules and the copper plates. The liquid cooling plate is made of 6063 stainless steel with a T5 post-processing technology, the IGBT modules are made of copper, the copper plates are made of copper, and the liquid cooling material is water. The standard aluminum alloy liquid cooling plate has dimensions of L500mm x 250mm x 30mm.

[0048] The conventional aluminum alloy liquid cooling plate assembly was imported from 3D modeling software into Ansys Discovery finite element simulation software to establish a thermal-fluid-solid coupled finite element system; the liquid cooling gravity direction was set, and the component thermal conductivity was set to 209 W / (㎡·℃);

[0049] The numerical parameters for finite element simulation analysis of conventional aluminum alloy liquid-cooled plate components include: maximum liquid-cooled plate temperature of 51.2℃, average temperature of 40.3℃, maximum liquid cooling velocity of 1.76m / s, pressure drop of 11100Pa, maximum static pressure of 11200Pa, and minimum static pressure of -150Pa.

[0050] Please see Figure 4 The standard aluminum alloy liquid cooling plate & copper tube assembly includes a liquid cooling plate, copper tubes, six IGBT modules with power ratings of 100W, 500W, 1000W, 1000W, 500W, and 500W on both sides of the liquid cooling plate, six copper plates between the liquid cooling plate and the IGBT modules, and thermal grease between the IGBT modules and the copper plates. The liquid cooling plate is made of 6063 stainless steel with a T5 post-processing technology; the IGBT modules and copper plates are made of copper; and the liquid cooling medium is water. The standard aluminum alloy liquid cooling plate dimensions are: L500mm x 250mm x 30mm.

[0051] The conventional aluminum alloy liquid cooling plate and copper tube assembly was imported from 3D modeling software into Ansys Discovery finite element simulation software to establish a thermal-fluid-solid coupled finite element system. The liquid cooling gravity direction was set, and the thermal conductivity of the assembly was set to 300 W / (㎡·℃). The thermal conductivity of aluminum alloy 6063-T5 was 209 W / (㎡·℃), and the thermal conductivity of copper tube was 390 W / (㎡·℃). The aluminum alloy liquid cooling plate and copper tube assembly were approximately obtained by averaging the two, which is 300 W / (㎡·℃).

[0052] The numerical parameters of the finite element simulation analysis of the conventional aluminum alloy liquid cooling plate & copper tube assembly include: maximum temperature of liquid cooling plate 50.2℃, average temperature 39.2℃, maximum liquid cooling velocity 1.8m / s, pressure drop 11500Pa, maximum static pressure 11700Pa, and minimum static pressure 0Pa.

[0053] Please see Figure 5 The metal 3D printed multi-surface area liquid cooling plate assembly includes a liquid cooling plate, six IGBT modules with power ratings of 100W, 500W, 1000W, 1000W, 500W, and 500W on both sides of the liquid cooling plate, six copper plates between the liquid cooling plate and the IGBT modules, and thermal grease between the IGBT modules and the copper plates. The metal 3D printed liquid cooling plate is made of 6063 stainless steel, using the T5 post-processing technology; the IGBT modules are made of copper; the copper plates are made of copper; and the liquid cooling material is water. The dimensions of the metal 3D printed multi-surface area liquid cooling plate are: L500mm x 250mm x 30mm.

[0054] The metal 3D printed multi-surface area liquid cooling plate assembly was imported from 3D modeling software into Ansys Discovery finite element simulation software to establish a thermal-fluid-solid coupled finite element system. The liquid cooling gravity direction was set, and the thermal conductivity of the assembly was set to 300 W / (㎡·℃). The thermal conductivity of aluminum alloy 6063-T5 was 209 W / (㎡·℃), and the thermal conductivity of copper plate was 390 W / (㎡·℃). The average value of the two, 300 W / (㎡·℃), was approximately obtained for the metal 3D printed multi-surface area liquid cooling plate assembly.

[0055] The numerical parameters of the finite element simulation analysis of the metal 3D printed multi-surface area liquid-cooled plate assembly include: maximum liquid-cooled plate temperature 42.3℃, average temperature 33.2℃, maximum liquid cooling velocity 1.87m / s, pressure drop 11000Pa, maximum static pressure 11300Pa, and minimum static pressure -44.6Pa.

[0056] Please see Figure 6 The metal 3D printed multi-surface area liquid cooling plate assembly includes a liquid cooling plate, six IGBT modules with power ratings of 100W, 500W, 1000W, 1000W, 500W, and 500W on both sides of the liquid cooling plate, six copper plates between the liquid cooling plate and the IGBT modules, and thermal grease between the IGBT modules and the copper plates. The metal 3D printed liquid cooling plate is made of 6063 stainless steel with a T5 post-processing technology, the IGBT modules are made of copper, the copper plates are made of copper, and the liquid cooling material is water. The dimensions of the metal 3D printed multi-surface area liquid cooling plate are L300mm x 250mm x 30mm.

[0057] The metal 3D printed multi-surface area liquid cooling plate assembly was imported from 3D modeling software into Ansys Discovery finite element simulation software to establish a thermal-fluid-solid coupled finite element system. The liquid cooling gravity direction was set, and the thermal conductivity of the assembly was set to 300 W / (㎡·℃). The thermal conductivity of aluminum alloy 6063-T5 was 209 W / (㎡·℃), and the thermal conductivity of copper plate was 390 W / (㎡·℃). The average value of the two, 300 W / (㎡·℃), was approximately obtained for the metal 3D printed multi-surface area liquid cooling plate assembly.

[0058] The numerical parameters of the finite element simulation analysis of the metal 3D printed multi-surface area liquid-cooled plate assembly include: maximum liquid-cooled plate temperature 43.4℃, average temperature 36.6℃, maximum liquid cooling velocity 1.75m / s, pressure drop 6570Pa, maximum static pressure 6700Pa, and minimum static pressure -354Pa.

[0059] Please see Figure 7 A comparison of finite element simulation numerical parameters of four liquid cooling plate components was conducted, and the welding machine liquid cooling plate metal 3D printed aluminum plate (L300mmXW250mmXH30mm) with the best overall performance was selected. Its part characteristics are as follows:

[0060] a) Compared to conventional aluminum plates (L500mm x W250mm x H30mm), the local maximum temperature is reduced by approximately 17%; the average temperature is reduced by approximately 16%; the weight is reduced by approximately 61%; the pressure drop is reduced by approximately 41%; and the volume is reduced by approximately 40%.

[0061] b) Compared to conventional aluminum plate & copper tube (L500mmXW250mmXH30mm), the local maximum temperature is reduced by approximately 14%; the average temperature is reduced by approximately 7%; the weight is reduced by approximately 62%; the voltage drop is reduced by approximately 43%; and the volume is reduced by approximately 40%.

[0062] c) Compared to a 3D-printed aluminum sheet (L500mm x W250mm x H30mm), the local maximum temperature is increased by approximately 3%; the average temperature is increased by approximately 10%; the weight is reduced by approximately 42%; the pressure drop is reduced by approximately 41%; and the volume is reduced by approximately 40%.

[0063] Based on this, the design process of the multi-surface area liquid cooling plate in Embodiment 1 is as follows: A 3D model of the liquid cooling plate metal 3D printed aluminum plate (L300mmXW250mmXH30mm), internal pipes, and a model of six inwardly deposited grooves on both sides of the 3D model of the liquid cooling plate metal 3D printed aluminum plate (L300mmXW250mmXH30mm) are imported into XT format using nTopogoly software and further converted into implicit modeling models. The liquid cooling plate body converted to implicit modeling is then filled with a Schwarz type model. Finally, the implicit modeling liquid cooling plate body filled with the Schwarz type model, the implicit modeling model of the internal pipes, and the implicit modeling model of the six inwardly deposited grooves on both sides are merged into a complete implicit modeling body.

[0064] Example 3

[0065] like Figure 8 and Figure 9 As shown, this embodiment proposes a welding machine, including a multi-surface area liquid cooling plate as described in Embodiment 1, as well as a housing and several electrical components. The interior of the welding machine housing 1 is relatively sealed. Therefore, a through hole is opened on the housing 1, and a waterproof and breathable membrane 8 is provided in the through hole. The waterproof and breathable membrane 8 is located at the bottom of the welding machine inner support plate 17, and is fastened from the bottom to the top by M5X40 screws 19. When the internal temperature of the welding machine increases under continuous load, and the air pressure exceeds the pressure value of the waterproof and breathable membrane, the pressure is released outward by the waterproof and breathable membrane, thereby balancing the air pressure outside and inside the welding machine.

[0066] Several electrical components include capacitor 2, 36V power supply board 3, inductor coil 6, IGBT-1 module (1000W) 7, current transformer (20W) 9, IGBT-3 module (100W) 10, IGBT-2 module (500W) 11, 24V power supply board 12, IGBT-4 module (100W) 13, IGBT-5 module (500W) 14, IGBT-6 module (1000W) 15, external control PCBA 16; the liquid cooling plate assembly heat dissipation system includes a three-dimensional liquid cooling plate assembly, liquid cooling tank 5, and liquid cooling pump 4;

[0067] like Figure 9 As shown, the 3D model of the welding machine assembly model, composed of a 3D-printed aluminum plate (L300mmXW250mmXH30mm) with a liquid-cooled metal plate, is imported into the finite element simulation software Ansys Discovery to analyze the numerical parameters. Theoretically, the lowest temperature of the liquid-cooled plate is at the liquid-cooling inlet. High-power electrical components are located in the area near the liquid-cooling inlet on both sides of the liquid-cooling plate. The welding machine liquid-cooled plate is hollowed out. The cold plate structural parts are made of metal with high thermal conductivity. Liquid cooling can quickly remove local high-density heat. Based on the finite element numerical parameters of the welding machine assembly, the temperature near the liquid-cooling inlet on both sides of the liquid-cooling plate under normal temperature load conditions can be obtained as higher than 25℃, thus preventing condensation.

[0068] In summary, the technical problem this invention aims to solve is to simultaneously address the issues of poor heat dissipation performance, high noise levels, large size, heavy weight, and long manufacturing cycles in existing high-power inverter air-cooled and liquid-cooled forced-heating welding machines, as well as the potential for condensation on the liquid cooling plates in the welding machine's liquid cooling system. The specific solution is as follows:

[0069] 1. Four liquid cooling plate component models were established using 3D modeling software, and thermal, fluid, and solid-state coupling simulation analysis was performed on them to obtain the simulation numerical parameters of the four liquid cooling component models. The 3D multi-surface area liquid cooling plate model with the best overall performance was selected. The liquid cooling component includes: an aluminum alloy liquid cooling plate, copper plates mounted in grooves on both sides of the aluminum alloy liquid cooling plate, IGBT electrical heating elements on both sides of the liquid cooling plate, and liquid. The liquid cooling heat dissipation system includes: liquid cooling components, liquid cooling pump, and liquid cooling box design;

[0070] 2. Based on the combined use of 3D modeling software, finite element simulation analysis software, and additive implicit modeling software, the liquid cooling plates in the four liquid cooling plate component models include: ordinary 3D modeled aluminum alloy liquid cooling plate (L500mmXW250mmXH30mm), ordinary 3D modeled aluminum alloy & copper tube liquid cooling plate (L500mmXW250mmXH30mm), 3D printed 3D modeled multi-surface liquid cooling plate (L500mmXW250mmXH30mm), and 3D printed 3D modeled multi-surface liquid cooling plate (L300mmXW250mmXH30mm). Based on the above four liquid cooling plate component models and the final assembly model, their finite element simulation analysis numerical parameters are calculated respectively (the final assembly welding machine only calculates the electrical heating power elements on both sides of the 3D liquid cooling plate), to obtain the optimal finite element simulation numerical parameters of the 3D printed 3D modeled multi-surface liquid cooling plate component (L300mmXW250mmXH30mm).

[0071] 3. Based on nTopogoly additive manufacturing software, an advanced implicit modeling model with the same dimensions (L300mm x W250mm x H30mm) and multiple surface areas was designed. This model includes Gyroid, Schwarz, Diamond, Lidinoid, Splitp, and Neovius infill types, and can be rapidly manufactured using metal 3D printing technology.

[0072] 5. The welding machine is relatively sealed inside. It is equipped with a waterproof and breathable membrane. When the internal temperature rises and the internal pressure exceeds the pressure that the waterproof and breathable membrane can withstand, the pressure is released outward through the membrane. Because the inside of the welding machine is relatively sealed, the air inside the welding machine remains relatively dry. Due to the many electrical heating elements inside the welding machine, the internal ambient temperature is relatively high during the welding machine's operation. At the same time, the liquid cooling plate structure is composed of a multi-surface area structure. The liquid cooling plate is made of aluminum alloy 6063-T5 with a high thermal conductivity. The liquid cooling plate and the copper plates on both sides of the liquid cooling plate are combined to form a liquid cooling plate with stronger heat dissipation. At the same time, high-power electrical components are designed on both sides near the liquid cooling inlet to prevent the formation of condensation.

[0073] 6. The pressure drop of the multi-surface area liquid cooling plate assembly (the shortened liquid cooling pipe length L300mmXW250mmXH30mm) analyzed by finite element simulation is significantly lower than that of existing liquid cooling plates on the market. This reduces the power output requirements of the liquid cooling pump, helps the product achieve green design, and is beneficial to environmental protection.

[0074] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit and essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0075] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A multi-surface area liquid-cooled plate, characterized in that, It includes a liquid cooling plate and several heat exchange plates disposed on the liquid cooling plate; The liquid cooling plate has several grooves that mate with several heat exchange plates. The liquid cooling plate is provided with cooling water channels, and the inlet and outlet of the cooling water channels are located on the same side of the liquid cooling plate. The liquid cooling plate has a hollow structure; The liquid cooling plate includes cooling water channels and multiple sub-units arranged in a matrix, with the multiple sub-units covering the cooling water channels; The subunit is a spherical shell structure with through holes, and the gap between four adjacent subunits forms a ventilation channel that runs through the liquid cooling plate, which improves air flow, makes the temperature near the heating element more uniform, and reduces the generation of condensation. The heat exchange plate is a copper plate.

2. A design method for the multi-surface area liquid-cooled plate as described in claim 1, characterized in that, Includes the following steps: S1. Based on 3D modeling software, various liquid cooling plate components are established, and finite element simulation analysis is performed to select the best multi-surface area liquid cooling plate scheme. S2. Based on 3D modeling software, establish the overall model of the best multi-surface liquid cooling plate with different sizes, and perform finite element simulation analysis. Based on the finite element numerical parameters of the welding machine assembly, obtain the temperature values ​​near the liquid cooling inlets on both sides of the liquid cooling plate under normal temperature load conditions to prevent condensation and select the multi-surface liquid cooling plate scheme with the best comprehensive performance. S3. Based on additive design software, an implicitly modeled multi-surface liquid cooling plate model of the same size was designed. The fill type for the multi-surface liquid cooling plate model in S3 is one of Gyroid, Schwarz, Diamond, Lidinoid, Splitp, and Neovius.

3. A welding machine, comprising the multi-surface area liquid cooling plate as described in claim 1, characterized in that, It also includes a housing and several electrical components. The housing has a through hole, and a waterproof and breathable membrane is installed inside the through hole.

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