Aluminum alloy flat tube section of unequal wall thickness for cooling chips

Abstract

The application provides an unequal-wall-thickness aluminum alloy flat pipe section for cooling chips, which comprises an anticorrosion structure, the inside of the anticorrosion structure is provided with a heat exchange support structure, the anticorrosion structure comprises an aluminum alloy flat pipe section body with a hollow structure, through holes are equidistantly arranged on the inner wall of the aluminum alloy flat pipe section body, sliding grooves are symmetrically arranged on the inner wall of the aluminum alloy flat pipe section body and can facilitate the dismounting and mounting of the heat exchange support structure, recesses are equidistantly arranged in the sliding grooves and can limit the parts of the heat exchange support structure, and guide grooves are arranged between the recesses and can facilitate the pushing and sliding of the parts of the heat exchange support structure. The through holes can make the heat exchange fluid and the wall surface have a speed difference, the fluid at the symmetric 'convex point' part can have a 'turbulent flow' state, and thus the heat exchange strength of the chip attached to the aluminum alloy porous flat pipe section body can be strengthened.

Description

Technical Field

[0001] This invention relates to the field of aluminum alloy flat tube profile technology, and in particular to an aluminum alloy flat tube profile with unequal wall thickness for cooling chips. Background Technology

[0002] As computing power continues to increase in data center GPUs, CPUs, and other chips, the focus of industry design has become on how to further improve the heat dissipation capacity of existing cooling chip materials, including hollow aluminum alloy extruded profiles for chips, while maintaining the same space. The industry believes that maximizing the heat exchange area between the cavity of the hollow aluminum profile and the coolant within a limited or given space is the key to the cavity structure design and a focal point of competition among companies. Furthermore, existing hollow aluminum profiles are prone to electrochemical reactions with the aluminum through the coolant, which can quickly lead to pitting corrosion, resulting in pipe perforation and leakage. Additionally, under prolonged exposure to the cyclical temperature changes of the chip, hollow aluminum profiles are susceptible to fatigue cracking due to thermal stress. Summary of the Invention

[0003] To address the shortcomings of existing technologies, this invention provides a flat aluminum alloy tube profile with unequal wall thickness for cooling chips, which solves the existing problems of how to increase heat exchange area, prevent internal wall corrosion, and resist impact.

[0004] This invention provides aluminum alloy flat tube profiles with unequal wall thickness for cooling chips, employing the following technical solution: A flat aluminum alloy tube profile with unequal wall thickness for cooling chips includes an anti-corrosion structure, wherein a heat exchange support structure is provided inside the anti-corrosion structure. The anti-corrosion structure includes an aluminum alloy flat tube profile with a hollow interior, and through holes are equidistantly opened on the inner wall of the aluminum alloy flat tube profile. The inner wall of the aluminum alloy flat tube profile is symmetrically opened with sliding grooves that facilitate the disassembly and installation of the heat exchange support structure, and grooves are equidistantly opened inside the sliding grooves that can lock and limit the components of the heat exchange support structure. The grooves are connected by guide grooves that facilitate the sliding of heat exchange support structure components.

[0005] Through the above technical solution, the through holes create a velocity difference between the heat exchange fluid and the wall surface, and the fluid at the symmetrical "protrusion" parts will generate a "turbulent" flow state, thereby enhancing the heat exchange strength of the chip attached to the porous flat tube profile of aluminum alloy.

[0006] Optionally, a connecting rod that can limit the secondary connection of the heat exchange support structure is fixedly connected inside the sliding groove. The surface of the connecting rod is surrounded and equidistantly provided with mounting grooves. Inside the mounting groove, the mounting rod is rotatably provided with a protrusion that can limit the insertion of heat exchange support structure components. A connecting spring is fixedly connected between the bottom of the protrusion and the mounting groove.

[0007] Through the above technical solution, the lifting distance of the protrusion can be changed by the connecting spring. By changing the lifting distance of the protrusion, the protrusion can be squeezed and stored and elastically restored.

[0008] Optionally, the inner wall of the aforementioned aluminum alloy flat tube profile is coated with a sacrificial anode layer, and the anode layer is made of zinc.

[0009] Through the above technical solution, the aluminum alloy flat tube profile body is provided, and through holes and sliding grooves can be opened on the inner wall of the aluminum alloy flat tube profile body. The sliding grooves allow the heat exchange support structure to slide and be installed inside the aluminum alloy flat tube profile body, and the through holes create a flow rate difference between the coolant and the inner wall of the aluminum alloy flat tube profile body.

[0010] Optionally, the above-mentioned heat exchange support structure includes a first aluminum plate with a through hole, and a hollow copper block is fixedly connected to the first aluminum plate through the through hole. The hollow copper block and the first aluminum plate are fixedly welded together, and a second aluminum plate that can wrap around the bottom of the hollow copper block is fixedly welded to the bottom of the first aluminum plate. The first aluminum plate and the second aluminum plate are seamlessly welded together.

[0011] Through the above technical solution, the hollow copper block and the first aluminum plate can be connected through the through hole. After the hollow copper block is connected through the hole, it is convenient to weld and fix the bottom of the hollow copper block to the bottom of the first aluminum plate, so that the absorbed heat can be transferred and the heat exchange efficiency can be improved.

[0012] Optionally, two sliding strips that are symmetrically fixedly connected to both sides of the first aluminum plate are matched with the sliding groove, and a connecting hole that matches the sliding of the connecting rod is opened above the sliding strip. A convex round block that can slide and limit the groove is fixedly connected to the surface of the sliding strip.

[0013] Through the above technical solution, the convex round block can play a locking and limiting role for the first aluminum plate and the second aluminum plate. After locking and limiting the first aluminum plate and the second aluminum plate, it is not only convenient for the first aluminum plate and the second aluminum plate to be locked and installed inside the aluminum alloy flat tube profile, but also convenient for the first aluminum plate and the second aluminum plate to be disassembled and separated in the future.

[0014] Optionally, the above-mentioned connecting rod is provided in two parts, and each connecting rod has three protrusions arranged in a ring on its surface.

[0015] Through the above technical solution, the connecting rod can guide the insertion of the sliding bar, and the protrusion on the top of the connecting rod can limit the sliding movement.

[0016] Optionally, the thickness of the above-mentioned anode layer spraying is 100 μm to 150 μm.

[0017] By applying an anodic layer to the inner wall of the aluminum alloy flat tube profile, the chemical reaction between the coolant and the interior of the aluminum alloy flat tube profile can be avoided, thus preventing corrosion of the inner wall of the aluminum alloy flat tube profile.

[0018] Optionally, multiple hollow copper blocks are provided, and the hollow copper blocks are equidistantly distributed on the surface of the first aluminum plate.

[0019] Through the above technical solution, the hollow copper block not only provides support for the interior of the aluminum alloy flat tube profile, but also absorbs and exchanges heat from the coolant, thereby improving the heat exchange intensity of the chip.

[0020] Optionally, the thickness of both the first aluminum plate and the second aluminum plate is set to 1.5-3mm.

[0021] Through the above technical solution, the second aluminum plate can be used to weld and seal the bottom of the first aluminum plate and the hollow copper block. After the first aluminum plate and the second aluminum plate are welded and sealed, they form a whole piece that can wrap the hollow copper block with an aluminum plate. At this time, the hollow copper block and the aluminum plate form a copper-aluminum mixed flow channel, which improves the heat exchange efficiency.

[0022] In summary, the present invention has at least one of the following beneficial effects: Multiple through holes are opened in the inner wall of the aluminum alloy flat tube profile, and each through hole is symmetrically opened. At the same time, two "protrusions" are designed on the thick wall surface of the aluminum alloy flat tube profile, and two "protrusions" are also designed on the thin wall surface at the bottom. A "protrusion" is also designed on each side wall at a symmetrical position at 1 / 2 of the height of the vertical rib of the dividing hole, so that there are six "protrusions" in each grid hole, thereby increasing the wet perimeter of the grid hole. Due to the local wall effect of the "protrusions", a velocity difference is generated between the heat exchange fluid and the wall. The fluid at the symmetrical "protrusion" part will generate a "turbulent" flow state, which can enhance the heat exchange intensity of the chip attached to the aluminum alloy flat tube profile.

[0023] When the coolant flows inside the aluminum alloy flat tube profile, it comes into direct contact with the hollow copper block disposed inside the aluminum alloy flat tube profile. The hollow copper block is used to quickly absorb the heat in the coolant and transfer the heat to the first aluminum plate and the second aluminum plate. The heat is then dissipated to the outside through the first aluminum plate and the second aluminum plate. This arrangement improves the heat exchange efficiency of the coolant on the one hand, and enhances the heat exchange intensity of the chip attached to the aluminum alloy flat tube profile on the other hand.

[0024] The first aluminum plate, the second aluminum plate, and the hollow copper block are all disposed inside the aluminum alloy flat tube profile and together constitute the internal support structure of the aluminum alloy flat tube profile. This internal support structure can enhance the aluminum alloy flat tube profile's ability to resist thermal stress, thereby preventing the aluminum alloy flat tube profile from fatigue cracking due to thermal stress accumulation when subjected to long-term thermal shock caused by the cyclical changes in chip temperature.

[0025] The coolant circulates inside the aluminum alloy flat tube profile. Electrochemical reactions can easily occur between the coolant and the aluminum alloy substrate, leading to corrosion. To address this, the inner wall of the aluminum alloy flat tube profile is coated with an anodic layer. The anodic layer is preferentially oxidized in the electrochemical environment, thereby inhibiting the corrosion reaction of the aluminum alloy substrate, significantly improving the corrosion resistance of the aluminum alloy flat tube profile, and extending its service life. Attached Figure Description

[0026] Figure 1 This is a three-dimensional structural schematic diagram of the present invention; Figure 2 This is a partial three-dimensional sectional view of the corrosion-resistant structure of the present invention; Figure 3 This is a partial three-dimensional cross-sectional view of the anti-corrosion structure of the present invention; Figure 4 This is a partial three-dimensional exploded structural diagram of the corrosion-resistant structure of the present invention; Figure 5 This is a partial three-dimensional structural schematic diagram of the heat exchange support structure of the present invention; Figure 6 This is a partial three-dimensional exploded structural diagram of the heat exchange support structure of the present invention; Figure 7 This is a partial three-dimensional structural diagram of the heat exchange support structure of the present invention.

[0027] In the diagram: 1. Anti-corrosion structure; 101. Aluminum alloy flat tube profile; 102. Through hole; 103. Sliding groove; 104. Groove; 105. Guide groove; 106. Connecting rod; 107. Mounting groove; 108. Mounting rod; 109. Protrusion; 1010. Connecting spring; 1011. Anode layer; 2. Heat exchange support structure; 201. First aluminum plate; 202. Through hole; 203. Hollow copper block; 204. Second aluminum plate; 205. Sliding bar; 206. Connecting hole; 207. Convex round block. Detailed Implementation

[0028] The following is in conjunction with the appendix Figures 1-7 The present invention will be described in further detail below.

[0029] Please refer to the attached diagram in the instruction manual. Figure 1 , Figure 2 , Figure 3 and Figure 4 An embodiment of the present invention provides: a flat aluminum alloy tube profile with unequal wall thickness for cooling chips, including an anti-corrosion structure 1, and a heat exchange support structure 2 is provided inside the anti-corrosion structure 1; The anti-corrosion structure 1 includes an aluminum alloy flat tube profile 101 with a hollow internal structure. The inner wall of the aluminum alloy flat tube profile 101 is provided with through holes 102 at equal intervals. The inner wall of the aluminum alloy flat tube profile 101 is provided with sliding grooves 103 that facilitate the disassembly and installation of the heat exchange support structure 2. The sliding grooves 103 are provided with grooves 104 at equal intervals inside to lock and limit the components of the heat exchange support structure 2.

[0030] The single sliding groove 103 has multiple grooves 104 evenly spaced inside. The multiple grooves 104 can be used to adjust the support of the first aluminum plate 201 and the hollow copper block 203 at different positions inside the aluminum alloy flat tube profile 101, thus increasing the adjustment flexibility of the overall heat exchange support structure 2.

[0031] See the attached diagram in the instruction manual. Figure 1 , Figure 2 , Figure 3 and Figure 4 A guide groove 105 is provided through the grooves 104 to facilitate the sliding of the heat exchange support structure 2 components. A connecting rod 106 is fixedly connected to the upper part of the sliding groove 103 to limit the secondary connection of the heat exchange support structure 2. The surface of the connecting rod 106 is surrounded by mounting grooves 107 at equal intervals. Inside the mounting groove 107, the mounting rod 108 is rotatably provided with a protrusion 109 to limit the insertion of the heat exchange support structure 2 components. A connecting spring 1010 is fixedly connected between the bottom of the protrusion 109 and the mounting groove 107.

[0032] See the attached diagram in the instruction manual. Figure 1 , Figure 2 , Figure 3 and Figure 4 The inner wall of the aluminum alloy flat tube profile 101 is coated with a sacrificial anode layer 1011, which is made of zinc. The coating thickness of the anode layer 1011 is 100 μm to 150 μm. When the coating thickness of the anode layer 1011 is 150 μm, the coolant comes into contact with the anode layer 1011 during the flow inside the aluminum alloy flat tube profile 101. The anode layer 1011 undergoes a sacrificial anode reaction to provide cathodic protection for the aluminum alloy flat tube profile 101. When the thickness of the anode layer 1011 is ≥150 μm, it can provide corrosion resistance to the aluminum alloy flat tube profile 101 and effectively extend its service life.

[0033] See the attached diagram in the instruction manual. Figure 5 , Figure 6 and Figure 7 The heat exchange support structure 2 includes a first aluminum plate 201 with a through hole 202, and a hollow copper block 203 is fixedly connected to the first aluminum plate 201 through the through hole 202. Multiple hollow copper blocks 203 are provided and are equidistantly distributed on the surface of the first aluminum plate 201. The arrangement of multiple hollow copper blocks 203 increases the contact area between the coolant and the high thermal conductivity copper material, so that when the coolant flows through the interior of the aluminum alloy flat tube profile 101, it can exchange heat with more copper surfaces, thereby significantly improving the heat exchange efficiency of the coolant. The equidistant distribution of the hollow copper blocks 203 makes the heat transferred from the first aluminum plate 201 to each copper block more uniform, avoiding local overheating and helping to maintain the temperature consistency of the chip or heat source device attached to the aluminum alloy flat tube profile 101. The equidistantly distributed hollow copper blocks 203 form a regular flow channel structure inside the aluminum alloy flat tube profile 101, which can guide the coolant to flow along a predetermined path, reduce flow dead zones, and generate local turbulence around the copper blocks, further enhancing the heat exchange effect. Multiple hollow copper blocks 203 together constitute the supporting skeleton inside the aluminum alloy flat tube profile 101, which can effectively resist the thermal shock caused by the periodic changes in chip temperature, reduce the damage of thermal stress to the flat tube wall, and thus prevent or delay the fatigue cracking of the aluminum alloy flat tube profile 101.

[0034] See the attached diagram in the instruction manual. Figure 5 , Figure 6 and Figure 7The hollow copper block 203 is fixed to the first aluminum plate 201 by welding, and the bottom of the first aluminum plate 201 is fixedly welded to a second aluminum plate 204 that can wrap the bottom of the hollow copper block 203. The first aluminum plate 201 and the second aluminum plate 204 are seamlessly welded. The thickness of the first aluminum plate 201 and the second aluminum plate 204 is set to 1.5-3mm. Setting the thickness of the first aluminum plate 201 and the second aluminum plate 204 to 3mm can make the first aluminum plate 201 and the second aluminum plate 204 more durable under the thermal shock conditions of cyclic temperature changes of the chip. Since the thinner the aluminum plate, the more concentrated the thermal stress distribution, and the corresponding decrease in fatigue life, the 1.3mm plate has a larger heat capacity and a higher fatigue safety margin compared to the ultra-thin plate, and exhibits better durability in long-term thermal cycling.

[0035] See the attached diagram in the instruction manual. Figure 5 , Figure 6 and Figure 7 Two sliding strips 205 are symmetrically fixedly connected to both sides of the first aluminum plate 201 to match the sliding groove 103. A connecting hole 206 matching the sliding rod 106 is opened above the sliding strip 205. A convex round block 207 that can slide and limit the groove 104 is fixedly connected to the surface of the sliding strip 205.

[0036] Working principle: When using aluminum alloy flat tube profiles with unequal wall thicknesses to power this cooling chip, the coolant circulates within the aluminum alloy flat tube profile 101, contacting the through holes 102 and the hollow copper block 203. This creates turbulence through the through holes 102 and the hollow copper block 203, improving the heat exchange efficiency. Furthermore, the hollow copper block 203 provides internal support for the aluminum alloy flat tube profile 101, reducing fatigue cracking that is prone to occur. When a long service life of the hollow copper block 203 is required and the heat exchange efficiency is low, the operator holds the first aluminum plate 201 and the second aluminum plate 204 and applies a downward pulling force. At this point, the first aluminum plate 201... 1. Simultaneously, the sliding bar 205, connecting hole 206, and convex block 207 of the first and second aluminum plates 204 are separated from the groove 104, guide groove 105, and connecting rod 106 by force. After the sliding bar 205 is separated from the connecting rod 106 by force, the convex block 109 is elastically restored by the connecting spring 1010. After the first aluminum plate 201, the second aluminum plate 204, and the hollow copper block 203 are completely disassembled from the aluminum alloy flat tube profile 101, the oxide on the surface of the hollow copper block 203 can be cleaned, thereby improving the heat exchange efficiency of the hollow copper block 203. During the circulation of the coolant inside the aluminum alloy flat tube profile 101, the anode layer 1011 undergoes a sacrificial anode reaction to provide cathodic protection for the aluminum alloy flat tube profile 101.

[0037] The above are all preferred embodiments of the present invention and are not intended to limit the scope of protection of the present invention. Therefore, all equivalent changes made in accordance with the structure, shape and principle of the present invention should be covered within the scope of protection of the present invention.

Claims

1. A flat aluminum alloy tube profile with unequal wall thickness for cooling chips, comprising an anti-corrosion structure (1), characterized in that: The corrosion-resistant structure (1) is provided with a heat exchange support structure (2) inside; The anti-corrosion structure (1) includes an aluminum alloy flat tube profile (101) with a hollow interior. The inner wall of the aluminum alloy flat tube profile (101) is provided with through holes (102) at equal intervals. The inner wall of the aluminum alloy flat tube profile (101) is provided with sliding grooves (103) symmetrically. The sliding grooves (103) are provided with grooves (104) at equal intervals inside. A guide groove (105) is provided between adjacent grooves (104). The heat exchange support structure (2) includes a first aluminum plate (201), a hollow copper block (203) that is fixedly connected to the first aluminum plate (201), and a second aluminum plate (204) that is fixedly connected to the bottom of the first aluminum plate (201) and wraps around the bottom of the hollow copper block (203).

2. The aluminum alloy flat tube profile with unequal wall thickness for cooling chips according to claim 1, characterized in that: The first aluminum plate (201) has symmetrical fixed connections on both sides of a sliding strip (205) that slides in cooperation with the sliding groove (103). The surface of the sliding strip (205) has a convex round block (207) that engages and limits the groove (104).

3. The aluminum alloy flat tube profile with unequal wall thickness for cooling chips according to claim 1, characterized in that: Multiple hollow copper blocks (203) are provided, and the multiple hollow copper blocks (203) are equidistantly distributed on the first aluminum plate (201).

4. The aluminum alloy flat tube profile with unequal wall thickness for cooling chips according to claim 1, characterized in that: A connecting rod (106) is fixedly connected to the upper part of the sliding groove (103). The surface of the connecting rod (106) is surrounded by and equidistantly provided with mounting grooves (107). A protrusion (109) is rotatably provided in the mounting groove (107) through the mounting rod (108). A connecting spring (1010) is fixedly connected between the protrusion (109) and the mounting groove (107).

5. The aluminum alloy flat tube profile with unequal wall thickness for cooling chips according to claim 3, characterized in that: Two connecting rods (106) are provided, and three protrusions (109) are provided in a ring on the surface of each connecting rod (106). According to claim 1, the aluminum alloy flat tube profile with unequal wall thickness for cooling chips is characterized in that: the inner wall of the aluminum alloy flat tube profile body (101) is coated with an anode layer (1011).

6. The aluminum alloy flat tube profile with unequal wall thickness for cooling chips according to claim 5, characterized in that: The anode layer (1011) is a zinc layer, and the coating thickness of the anode layer (1011) is 100 μm to 150 μm.

7. The aluminum alloy flat tube profile with unequal wall thickness for cooling chips according to claim 1, characterized in that: The thickness of the first aluminum plate (201) and the second aluminum plate (204) is 1.5 mm to 3 mm.

8. The aluminum alloy flat tube profile with unequal wall thickness for cooling chips according to claim 1, characterized in that: The sliding bar (205) has a connecting hole (206) that slides with the connecting rod (106).

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