A copper serrated heat sink and method of manufacture

Abstract

This invention discloses a copper shovel-tooth radiator and its preparation method, relating to the field of copper shovel-tooth technology. It includes a radiator body, a two-phase flow chamber, and a copper shovel-tooth body. Multiple sets of capillary structures are arranged between multiple sets of fins at the upper end of the copper shovel-tooth body, and these capillary structures are formed by electrochemical deposition. A flow guide plate is installed on the inner wall of the radiator body and is suspended in the upper region of the copper shovel-tooth body. By setting a copper shovel-tooth body, this invention allows for the growth of dendritic capillary structures of different levels—main trunk, branches, and blades—within the fin gaps by adjusting the electrolyte concentration, deposition current, and deposition time. The pore size and branching density can be flexibly adjusted to obtain capillary suction pressure suitable for the operating conditions, ensuring that the liquid working fluid overcomes gravity and stably flows back to the hot end. The capillary structures are directly electrochemically formed between the fins at the upper end of the copper shovel-tooth body, eliminating the need for additional processing and assembly of independently sintered capillary sheets.

Description

Technical Field

[0001] This invention relates to the field of copper shovel tooth technology, specifically to a copper shovel tooth radiator and its preparation method. Background Technology

[0002] When electronic devices are working, the electrical energy loss of components such as chips and circuit boards is converted into heat energy. If the heat accumulates and cannot be dissipated in time, it will cause the device to heat up, reduce performance frequency, freeze and crash, accelerate the aging of components, greatly shorten the service life of the device, and in severe cases, cause hardware to burn out.

[0003] As the power density of electronic devices continues to increase, traditional aluminum extrusion and finned heat sinks are limited by interface thermal resistance and molding process, making it difficult to meet the heat dissipation requirements of high heat flow conditions. In order to reduce heat conduction link loss and increase effective heat exchange area, integrated molding structure has been widely used. Copper finned heat sink is a very representative solution. It is formed by shaving a whole piece of copper material to form continuous fins. The substrate and heat dissipation fins are integrated, eliminating the contact thermal resistance caused by welding assembly. Combined with the excellent thermal conductivity of copper, it has become an important choice for heat dissipation of high-power electronic devices.

[0004] In existing technologies, copper spade teeth generally use independent copper powder sintered sheets as capillary cores. Copper powder is laid in a mold and sintered at high temperature to form porous sintered copper sheets, which are then fixed to the outer wall of the copper spade tooth fins by brazing or bonding. Capillary force is generated by the sintered pores to achieve the reflux of the condensed working fluid and complete the two-phase flow cycle. However, the sintered capillary core is an independent part and is not integrally formed with the cavity substrate. The sintered sheet and the copper spade tooth fins are assembled by brazing and pressing, and there must be an interface gap between the two, forming contact thermal resistance. The process of heat transfer from the hot end of the outer shell to the capillary core and then to the liquid working fluid is hindered. The higher the power, the more obvious the heat loss caused by this interface. Summary of the Invention

[0005] Therefore, the purpose of this invention is to provide a copper spade-tooth radiator and its manufacturing method to solve the technical problems in the background art mentioned above.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a copper shovel-tooth radiator, comprising a radiator body, a two-phase flow chamber and a copper shovel-tooth body, wherein the copper shovel-tooth body is installed at the bottom end of the radiator body, and a two-phase flow chamber is formed between the radiator body and the copper shovel-tooth body; The cross-section of the multiple sets of fins at the upper end of the copper shovel tooth body is multi-segment "S" shaped. Multiple sets of capillary structures are provided between the multiple sets of fins at the upper end of the copper shovel tooth body. The multiple sets of capillary structures form the trunk skeleton of dendritic capillaries through electrochemical deposition. A guide plate is installed on the inner wall of the radiator body and is suspended in the upper area of ​​the copper shovel tooth body.

[0007] By adopting the above technical solution, the problem of contact thermal resistance formed by brazing and pressing the sintered sheet and copper spade fins is solved. By adjusting the electrolyte concentration, deposition current and deposition time, a dendritic capillary structure with different levels of trunk, branches and blades can be grown in the gap between the fins. The pore size and branching density can be flexibly adjusted to obtain the capillary suction pressure suitable for the working conditions, ensuring that the liquid working fluid overcomes gravity and flows back to the hot end stably. The capillary structure is directly electrochemically formed between the upper fins of the copper spade, without the need for additional processing and assembly of independent sintered capillary sheets.

[0008] The present invention is further configured such that an air extraction pipe is installed on the upper end of the radiator body, and the air extraction end of an external air extraction pump is connected to the air extraction pipe.

[0009] Preferably, the vacuum pump is turned on to perform a long-term vacuuming operation on the two-phase flow chamber, gradually removing the air and residual water vapor inside the chamber, so that the two-phase flow chamber reaches a preset high vacuum degree, reducing the amount of non-condensable gas residue inside the chamber. Non-condensable gas will hinder steam heat transfer and reduce condensation efficiency.

[0010] The present invention is further configured such that a water injection pipe is installed on the upper end of the radiator body, and the outlet end of the external water injection pump is connected to one end of the water injection pipe.

[0011] Preferably, the water injection pump is started to inject the deionized water liquid working medium, which has undergone degassing treatment, into the two-phase flow chamber. The injection volume is precisely proportioned in advance according to the chamber volume and heat load.

[0012] The present invention is further configured such that the guide plate is inclined.

[0013] Preferably, some of the condensed water droplets are small in size and light in weight, so they cannot fall off directly by gravity. Instead, they flow slowly along the slope of the inclined guide plate. As they flow, the small water droplets collide with and merge with other tiny condensed water droplets along the way, and their volume and weight continue to increase. When the weight of the water droplet exceeds the adhesion threshold, it drips downwards.

[0014] The present invention is further configured such that multiple sets of mist collection grooves are provided at the bottom end of the guide plate, and the multiple sets of mist collection grooves are all arranged in a multi-faceted arc-shaped concave shape.

[0015] Preferably, the mist collecting groove has a multi-faceted arc-shaped concave structure. After water droplets flow into the groove, they will gather along the arc-shaped inner wall to the lowest point of the groove. The arc-shaped inner wall can quickly gather the condensed water droplets from all parts of the mist collecting groove to the center of the bottom of the groove, greatly accelerating the collision and fusion speed between adjacent tiny water droplets, and forming larger droplets in a short time, allowing the water droplets to reach the weight of falling off more quickly, shortening the water droplet growth cycle, and improving the condensation reflux speed.

[0016] The present invention is further configured such that a cooling pipe is installed through one end of the radiator body, and one end of the cooling pipe is externally connected to an air-cooling device or a water-circulating cooling device.

[0017] Preferably, after the external air-cooling device or water-circulating cooling device is started, the low-temperature airflow or cooling water is introduced into the cooling pipe. During the flow of the cooling medium, the heat of the cooling pipe wall is continuously carried away, thereby indirectly absorbing the excess heat accumulated in the liquid working medium inside the two-phase flow chamber and assisting in cooling the working medium inside the two-phase flow chamber.

[0018] A method for manufacturing a copper spade-shaped radiator includes the following steps: S1: Cleaning operation of copper shovel teeth body: Immerse the copper shovel teeth body in 0.2mol / L dilute sulfuric acid solution for 2 minutes, and then immerse it in 1mol / L sodium hydroxide alkaline solution for 30 seconds; S2: Electrodeposition of Copper Shovel Tooth Body: The copper shovel tooth body is placed inside the electrolytic cell as the working electrode for electrodeposition. First, electrochemical deposition of the lower main capillary structure is carried out. This lower structure is a dendritic capillary backbone. The electrolyte is an acidic copper plating solution composed of 0.6 mol / L copper sulfate and 0.2 mol / L sulfuric acid. Taking a deposition area of ​​3.0 × 3.0 mm as an example, the electrodeposition adopts a stepped current ramp mode. The initial current is set to 1.44 A, and then the current is linearly increased at an increase of 1.08 A per minute. The total deposition time is 6 min. Then, the electrolyte system is changed to deposit the upper capillary branch structure. The upper capillary structure corresponds to the branches of the tree and the leaf-like micro-protrusions. The upper electrolyte is a mixed solution of 0.4 mol / L copper sulfate and 1.0 mol / L sulfuric acid. Again, taking a deposition area of ​​3.0 × 3.0 mm as an example, the electrodeposition is carried out for 1 min under a constant current of 9.0 A. S3: Welding the radiator body to the copper shovel tooth body: Weld the radiator body to the upper end face of the copper shovel tooth body. The radiator body is lowered to completely cover the fins at the upper end of the copper shovel tooth body. The inner wall of the radiator body, the guide plate and the upper fins of the copper shovel tooth body together form a sealed two-phase flow chamber. Weld and fix the air extraction pipe and the water injection pipe to the two pre-set process pipe ports of the radiator body respectively. After the assembly is completed, use helium testing to conduct a preliminary air tightness inspection on the weld and pipe port positions to check for welding leaks in advance. S4: Liquid working fluid injection into the two-phase flow chamber: The suction end of the vacuum pump is sealed and connected to the suction pipe, and the outlet of the liquid injection pump is sealed and connected to the water injection pipe. First, the vacuum pump is turned on to perform a long-term vacuum operation on the two-phase flow chamber cavity, gradually extracting the air and residual water vapor inside the cavity, so that the two-phase flow chamber reaches the preset high vacuum degree, reducing the residual non-condensable gas inside the cavity. Non-condensable gas will hinder steam heat transfer and reduce condensation efficiency. After the vacuum degree reaches the standard, the vacuum pump is turned off, and then the water injection pump is turned on to inject the deionized water liquid working fluid, which has been degassed, into the two-phase flow chamber. The injection volume is precisely proportioned according to the cavity volume and heat load. After the working fluid is added, the metal pipes of the suction pipe and the water injection pipe near the cavity are temporarily sealed by using hydraulic clamps. Then, the pipe openings are permanently sealed by argon arc welding or brazing. After welding, the cavity is checked for leaks again to ensure that the two-phase flow chamber remains in a sealed and leak-free state for a long time.

[0019] In summary, the present invention has the following main beneficial effects: 1. This invention solves the problem of contact thermal resistance formed by brazing and pressing the sintered sheet and copper shovel tooth fins together by setting a copper shovel tooth body. By adjusting the electrolyte concentration, deposition current and deposition time, a dendritic capillary structure with different levels of trunk, branches and blades can be grown in the gap between the fins. The pore size and branching density can be flexibly adjusted to obtain the capillary suction pressure suitable for the working conditions, ensuring that the liquid working fluid overcomes gravity and flows back to the hot end stably. The capillary structure is directly electrochemically formed between the fins on the upper end of the copper shovel tooth, without the need for additional processing and assembly of independent sintered capillary sheets.

[0020] 2. This invention incorporates a guide plate. High-temperature water vapor rises and condenses into tiny water droplets upon contact with the lower surface of the inclined guide plate. Some of these condensed water droplets are too small to fall directly due to their own weight. The inclined guide plate provides a slope for the small water droplets to slide and flow. As the tiny water droplets flow along the plate surface, they continuously collide, merge, and coalesce, gradually increasing in size and weight. Once they reach the conditions for detachment, they fall downwards. This avoids a large number of micro-water droplets adhering to the condensation wall for a long time and failing to fall back down, thus improving the efficiency of water vapor conversion and recovery into liquid water.

[0021] 3. This invention, by incorporating cooling pipes, allows the working fluid water in the two-phase flow chamber to repeatedly evaporate and condense during prolonged high-load continuous operation. As a result, heat accumulates and the overall temperature of the working fluid gradually increases. The temperature difference between the evaporation and condensation ends decreases, leading to a decline in heat dissipation performance. The cooling pipes are in close contact with the working fluid inside the two-phase flow chamber. An external air-cooling or water circulation device delivers a low-temperature medium through the cooling pipes, which can continuously remove the heat accumulated in the cooling pipes, indirectly reducing the body temperature of the liquid working fluid inside the chamber and preventing the heat exchange efficiency from decreasing due to persistently high working fluid temperatures. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the heat sink body in this invention; Figure 2 This is a side sectional view of the heat sink body in this invention; Figure 3 This is an exploded view of the radiator body in this invention; Figure 4 This is a schematic diagram of the internal structure of the radiator body in this invention; Figure 5 This is a schematic diagram of the cooling pipe in this invention; Figure 6 This is a plan view of the copper shovel tooth body in this invention; Figure 7 This is a schematic diagram of the guide plate in the first embodiment of the present invention; Figure 8 This is a schematic diagram of the guide plate in the second embodiment of the present invention.

[0023] Explanation of reference numerals in the attached figures: 1. Radiator body; 2. Air extraction pipe; 3. Water injection pipe; 4. Two-phase flow chamber; 5. Copper shovel tooth body; 6. Guide plate; 7. Mist collection groove; 8. Cooling pipe. Detailed Implementation

[0024] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0025] The embodiments of the present invention will now be described.

[0026] Example 1: A copper spade-tooth radiator, please refer to [link / reference]. Figure 1 - Figure 8 It includes a radiator body 1, a two-phase flow chamber 4 and a copper shovel tooth body 5. The copper shovel tooth body 5 is installed at the bottom of the radiator body 1, and a two-phase flow chamber 4 is formed between the radiator body 1 and the copper shovel tooth body 5. The cross-section of the multiple sets of fins at the upper end of the copper shovel tooth body 5 is multi-segment "S" shaped. Multiple sets of capillary structures are provided between the multiple sets of fins at the upper end of the copper shovel tooth body 5. The multiple sets of capillary structures are formed by electrochemical deposition. The capillary structures are directly electrochemically formed between the fins at the upper end of the copper shovel tooth, without the need for additional processing or assembly of independent sintered capillary fins. A guide plate 6 is installed on the inner wall of the radiator body 1, and the guide plate 6 is suspended in the upper area of ​​the copper shovel tooth body 5.

[0027] Please see Figure 1 - Figure 3The upper end of the radiator body 1 is equipped with an air extraction pipe 2, and the air extraction end of the external air extraction pump is connected to the air extraction pipe 2. When the air extraction pump is turned on, the two-phase flow chamber 4 is evacuated for a long time to gradually extract the air and residual water vapor inside the chamber, so that the two-phase flow chamber 4 reaches the preset high vacuum degree, reducing the residual non-condensable gas inside the chamber. Non-condensable gas will hinder steam heat transfer and reduce condensation efficiency.

[0028] Please see Figure 1 - Figure 3 A water injection pipe 3 is installed on the upper end of the radiator body 1, and the outlet of the external water injection pump is connected to one end of the water injection pipe 3. When the water injection pump is started, the deionized water liquid working medium after degassing is injected into the two-phase flow chamber 4. The injection volume is precisely proportioned in advance according to the chamber volume and heat load.

[0029] Please see Figure 3 - Figure 7 The guide plate 6 is set at an angle. Some of the condensed water droplets are small in size and not heavy enough to fall off directly by gravity. They will flow slowly along the slope of the lower surface of the inclined guide plate 6. During the flow, the small water droplets will continuously collide with and merge with other tiny condensed water droplets along the way. The volume and weight of the water droplets will continue to increase. When the weight of the water droplets exceeds the adhesion threshold, they will drip downwards.

[0030] Example 2, please refer to Figure 8 The bottom of the guide plate 6 has multiple sets of mist collection grooves 7, and all sets of mist collection grooves 7 are multi-faceted arc-shaped concave. The mist collection grooves 7 have a multi-faceted arc-shaped concave structure. After water droplets flow into the grooves, they will gather along the arc-shaped inner wall to the lowest point of the groove. The arc-shaped inner wall can quickly gather the condensed water droplets from all parts of the mist collection grooves 7 to the center of the bottom of the groove, which greatly accelerates the collision and fusion speed between adjacent tiny water droplets. In a short time, they gather to form larger droplets, allowing the water droplets to reach the weight of falling off more quickly, shortening the water droplet growth cycle, and improving the condensation and reflux speed.

[0031] Please see Figure 1 - Figure 6 A cooling pipe 8 is installed through one end of the radiator body 1, and one end of the cooling pipe 8 is connected to an external air-cooling device or a water-circulating cooling device. After the external air-cooling device or water-circulating cooling device is started, low-temperature airflow or cooling water is introduced into the cooling pipe 8. During the flow of the cooling medium, the heat of the cooling pipe 8 wall is continuously carried away, thereby indirectly absorbing the excess heat accumulated in the liquid working medium inside the two-phase flow chamber 4, and assisting in cooling the working medium inside the two-phase flow chamber 4.

[0032] The working principle of this invention is as follows: When preparing the copper shovel tooth radiator, the worker soaks the copper shovel tooth body 5 in a 0.2 mol / L dilute sulfuric acid solution for 2 minutes to remove the oxide layer and passivation film generated on the surface of the copper substrate. Then, the workpiece is taken out and rinsed with deionized water, and then placed in a 1 mol / L sodium hydroxide alkaline solution for 30 seconds to remove the organic contaminants such as cutting oil, mold release agent, and fingerprint oil stains remaining on the surface of the copper shovel tooth body 5. After cleaning, the workpiece is rinsed thoroughly with deionized water again to avoid acid and alkali residues being brought into the electrolytic cell and causing electrolyte component contamination. After rinsing, the surface water of the workpiece is drained. Next, the copper shovel tooth body 5 is placed inside the electrolytic cell as the electrodeposition working electrode. First, the electrochemical deposition of the lower trunk capillary structure is carried out. This lower structure is a dendritic capillary trunk skeleton. The electrolyte is an acidic copper plating solution composed of 0.6 mol / L copper sulfate and 0.2 mol / L sulfuric acid. Taking a deposition area of ​​3.0×3.0 mm as an example, the electrodeposition adopts a stepped current ramp mode. The initial current is set to 1.44 A, and then the current is linearly increased by 1.08 A per minute. The total deposition time is 6 min. After the current is turned on, the copper ions in the electrolyte undergo a reduction reaction on the surface of the copper shovel tooth substrate under the action of the external electric field to generate elemental copper. The elemental copper is deposited directionally along the preferred growth direction of the electric field, and gradually grows to form a robust and continuous dendritic trunk capillary skeleton. The trunk structure provides an attachment substrate for the subsequent growth of the upper branches, and at the same time, it constructs the main transport channel for the liquid working fluid to flow back from the cold end to the hot end. Then, the electrolyte system was changed to deposit the upper capillary dendritic structure. The upper capillary structure corresponds to the branches of the tree and the leaf-like micro-protrusions. The upper electrolyte was prepared as a mixed solution of 0.4 mol / L copper sulfate and 1.0 mol / L sulfuric acid. Again, a deposition area of ​​3.0×3.0 mm was selected as the implementation case. Electrodeposition was carried out for 1 min under a constant current of 9.0 A. The high current density promoted the rapid nucleation of copper ions. A large number of branched, dense, and porous dendritic capillary microstructures were grown outward from the surface of the lower main skeleton. Finally, a complete dendritic porous capillary layer was generated in the gap area between multiple sets of fins on the upper end of the copper shovel tooth body 5. After the electrodeposition process was completed, the copper shovel tooth body 5 was taken out of the electrolytic cell. The residual electrolyte on the surface of the workpiece was rinsed with deionized water and then placed in a constant temperature drying oven for low-temperature drying. The drying temperature was controlled at 60-80℃ to avoid oxidation, collapse and deformation of the capillary microstructure caused by high temperature. After the copper shovel tooth body 5 is dried and cooled to room temperature, the radiator body 1 is welded to the upper end face of the copper shovel tooth body 5. The radiator body 1 wraps and covers the fins at the upper end of the copper shovel tooth body 5. The inner wall of the radiator body 1, the guide plate 6 and the upper fins of the copper shovel tooth body 5 together form a sealed two-phase flow chamber 4. The exhaust pipe 2 and the water injection pipe 3 are welded and fixed to the two process pipe openings of the radiator body 1 respectively. After the assembly is completed, the weld and pipe opening positions are initially inspected for air tightness using helium testing to check for welding leaks in advance. After the air tightness test is passed, the suction end of the vacuum pump is sealed and connected to the suction pipe 2, and the outlet of the liquid injection pump is sealed and connected to the water injection pipe 3. First, the vacuum pump is turned on to perform a long-term vacuum operation on the two-phase flow chamber 4, gradually extracting the air and residual water vapor inside the chamber, so that the two-phase flow chamber 4 reaches the preset high vacuum degree, reducing the residual non-condensable gas inside the chamber. Non-condensable gas will hinder steam heat transfer and reduce condensation efficiency. After the vacuum degree reaches the standard, the vacuum pump is turned off and the water injection pump is turned on to inject the deionized water liquid working fluid after degassing into the two-phase flow chamber 4. The amount of liquid injected is precisely proportioned according to the chamber volume and heat load in advance. After the working fluid is added, the metal pipes of the suction pipe 2 and the water injection pipe 3 near the chamber are temporarily sealed by using hydraulic clamps. Then, the pipe openings are permanently sealed by argon arc welding or brazing. After the welding is completed, the chamber is checked for leaks again to ensure that the two-phase flow chamber 4 is kept in a sealed and leak-free state for a long time. When the copper shovel-tooth radiator is actually in operation, the bottom surface of the copper shovel-tooth body 5 is in close contact with the external heat source. The heat generated by the heat source is transferred through the bottom surface of the copper shovel-tooth body 5 and is quickly conducted to the fin areas at the upper end of the copper shovel-tooth body 5 by relying on the high thermal conductivity of the copper substrate. After the fins are heated, the liquid water working medium adsorbed and retained in the dendritic capillary structure pores between the fins continuously absorbs heat. After reaching the saturation temperature, it absorbs heat and evaporates into water vapor. The generated water vapor flows upward and enters the upper cavity area of ​​the upper two-phase flow chamber 4. The relatively low temperature and inclined guide plate 6 spans the inside of the two-phase flow chamber 4. The high temperature water vapor rises and comes into contact with the lower surface of the guide plate 6 with a lower temperature. It is cooled and undergoes phase change condensation, and re-condenses into liquid water droplets. As some water droplets grow and accumulate, their own weight exceeds the surface adhesion force, causing them to drip vertically downwards and flow back to the upper fin area of ​​the copper shovel tooth body 5. Other condensed water droplets are smaller and lighter, and cannot fall off directly due to gravity. They flow slowly along the slope of the lower surface of the inclined guide plate 6. During the flow, the small water droplets collide and merge with other tiny condensed water droplets along the way, causing the droplet volume and weight to increase continuously. When the weight of the water droplet exceeds the adhesion threshold, it drips downwards to the upper fin position of the copper shovel tooth body 5. The inclined guide plate extends the flow path of the tiny water droplets, greatly improving the recovery efficiency of water vapor condensation into liquid water and reducing the performance degradation caused by condensed water remaining on the condensation wall and not being able to flow back. The liquid working fluid dripping onto the fins is immediately captured by the dendritic capillary structure prepared by electrochemical deposition between the fins of the copper spade tooth body. The dendritic branched capillary structure has well-developed porous gaps, which can generate a stable and strong capillary suction force. The liquid working fluid relies on capillary force to flow back down along the dendritic capillary channel to the heat source hot area at the bottom. After the liquid working fluid reaches the hot end, it absorbs heat and evaporates again, thus completing the continuous closed-loop two-phase flow circulation heat dissipation process of evaporation, condensation, and reflux. Under prolonged continuous high-load operation, the liquid working fluid water inside the two-phase flow chamber 4 undergoes repeated heat absorption and condensation cycles, causing the overall temperature of the working fluid to rise slowly. The saturated steam temperature inside the chamber increases, and the temperature difference between the heat source and the condensation side continuously decreases, resulting in a gradual decline in the overall heat dissipation efficiency of the radiator. Cooling pipes 8 are installed throughout the two-phase flow chamber 4, with the pipe walls tightly fitted to the water inside. After the external air-cooling device or water circulation cooling device is activated, low-temperature airflow or cooling water is introduced into the cooling pipes 8. During the flow of the cooling medium, the heat from the pipe walls of the cooling pipes 8 is continuously carried away, thereby indirectly absorbing the excess heat accumulated in the liquid working fluid inside the two-phase flow chamber 4. This provides auxiliary cooling for the working fluid inside the two-phase flow chamber 4, widening the heat exchange temperature difference between the evaporation end and the condensation end, ensuring that the copper spade radiator can maintain a stable and efficient heat dissipation effect even under prolonged continuous operation.

[0033] Although embodiments of the present invention have been shown and described, these specific embodiments are merely explanations of the invention and are not intended to limit it. The specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. After reading this specification, those skilled in the art may make modifications, substitutions, and variations to the embodiments as needed without departing from the principles and spirit of the invention, but such modifications, substitutions, and variations are protected by patent law as long as they are within the scope of the claims of the present invention.

Claims

1. A copper shovel-tooth radiator, comprising a radiator body (1), a two-phase flow chamber (4), and a copper shovel-tooth body (5), characterized in that: A copper shovel tooth body (5) is installed at the bottom of the radiator body (1), and a two-phase flow chamber (4) is formed between the radiator body (1) and the copper shovel tooth body (5). The cross-section of the multiple sets of fins at the upper end of the copper shovel tooth body (5) is multi-segment "S" shaped. Multiple sets of capillary structures are provided between the multiple sets of fins at the upper end of the copper shovel tooth body (5), and the multiple sets of capillary structures form the trunk skeleton of dendritic capillaries through electrochemical deposition. A guide plate (6) is installed on the inner wall of the radiator body (1), and the guide plate (6) is suspended in the upper area of ​​the copper shovel tooth body (5).

2. The copper spade-tooth radiator according to claim 1, characterized in that: The upper end of the radiator body (1) is equipped with an air extraction pipe (2), and the air extraction end of the external air extraction pump is connected to the air extraction pipe (2).

3. A copper spade-tooth radiator according to claim 2, characterized in that: The upper end of the radiator body (1) is equipped with a water injection pipe (3), and the outlet end of the external water injection pump is connected to one end of the water injection pipe (3).

4. A copper spade-tooth radiator according to claim 1, characterized in that: The guide plate (6) is set at an angle.

5. A copper spade-tooth radiator according to claim 1, characterized in that: The bottom end of the guide plate (6) has multiple sets of mist collection grooves (7), and the multiple sets of mist collection grooves (7) are all arranged in a multi-faceted arc-shaped concave shape.

6. A copper spade-tooth radiator according to claim 1, characterized in that: The radiator body (1) has a cooling pipe (8) installed through one end, and the cooling pipe (8) is connected to an external air-cooling device or a water-circulating cooling device.

7. A method for manufacturing a copper spade-shaped radiator, characterized in that... The process of using a copper spade-shaped radiator according to any one of claims 1-6 includes the following steps: S1: Cleaning operation of copper shovel tooth body (5): The copper shovel tooth body (5) is immersed in 0.2mol / L dilute sulfuric acid solution for 2min and then placed in 1mol / L sodium hydroxide alkaline solution for 30s. S2: Electrodeposition of Copper Shovel Tooth Body (5): The copper shovel tooth body (5) is placed inside the electrolytic cell as the working electrode for electrodeposition. First, electrochemical deposition is performed on the lower trunk capillary structure of the copper shovel tooth body (5). The lower structure of the copper shovel tooth body (5) is a dendritic capillary trunk skeleton. The electrolyte is an acidic copper plating solution composed of 0.6 mol / L copper sulfate and 0.2 mol / L sulfuric acid. Taking a deposition area of ​​3.0 × 3.0 mm as an example, the electrodeposition adopts a stepped current ramp mode, and the initial current is set to 1. 0.44A, then the current was linearly increased by 1.08A per minute, the total deposition time was 6 minutes, and then the electrolyte system was changed to deposit the capillary branch structure on the upper layer of the copper shovel tooth body (5). The capillary structure on the upper layer of the copper shovel tooth body (5) corresponds to the branches of the tree branches and leaf-like micro-protrusions. The upper electrolyte was prepared as a mixed solution of 0.4 mol / L copper sulfate and 1.0 mol / L sulfuric acid. Similarly, a deposition area of ​​3.0 × 3.0 mm was selected as the implementation case, and electrodeposition was carried out for 1 minute under a constant current of 9.0A. S3: Welding the radiator body (1) to the copper shovel tooth body (5): Weld the radiator body (1) to the upper end face of the copper shovel tooth body (5). The radiator body (1) wraps and covers the fins at the upper end of the copper shovel tooth body (5) with the radiator body (1). The inner wall of the radiator body (1), the guide plate (6) and the upper fins of the copper shovel tooth body (5) are sealed together to form a closed two-phase flow chamber (4). The exhaust pipe (2) and the water injection pipe (3) are welded and fixed at the two process pipe openings of the radiator body (1) respectively. After the assembly is completed, the weld and pipe opening positions are initially inspected for air tightness using helium testing to check for welding leaks in advance. S4: Liquid working fluid injection into the two-phase flow chamber (4): The suction end of the vacuum pump is sealed and connected to the suction pipe (2), and the outlet of the liquid injection pump is sealed and connected to the water injection pipe (3). First, turn on the vacuum pump to perform a long-term vacuum operation on the cavity of the two-phase flow chamber (4), gradually extracting the air and residual water vapor inside the cavity, so that the cavity of the two-phase flow chamber (4) reaches the preset high vacuum degree, reducing the residual non-condensable gas inside the cavity. Non-condensable gas will hinder steam heat transfer and reduce condensation efficiency. After the vacuum degree reaches the standard, turn off the vacuum pump and then turn on the vacuum pump again. The pump injects deionized water into the two-phase flow chamber (4) after degassing. The amount of liquid injected is precisely proportioned according to the volume of the chamber and the heat load. After the working fluid is injected, the metal pipes of the suction pipe (2) and the water injection pipe (3) near the end of the chamber are temporarily sealed by using hydraulic clamps. Then, the pipe openings are permanently sealed by argon arc welding or brazing. After welding, the chamber is checked for leaks again to ensure that the two-phase flow chamber (4) remains sealed and leak-free for a long time.

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