Composite radiator and processing method thereof

Abstract

The present invention relates to the technical field of radiators, and specifically to a composite radiator and a processing method thereof, comprising an upper cover plate and a base, wherein a plurality of first folded fins are arranged at intervals between the upper cover plate and the base, and a first mounting groove is provided on the upper surface of the base between two adjacent first folded fins, and mutually parallel first flat tubes are inserted in each first mounting groove, and a first end cap which is plugged and matched with the upper cover plate is sealed at one end of the first flat tube, and the other end of the first flat tube is connected to a lower cavity provided at the bottom of the base, and a lower cover plate is sealed at the opening of the lower cavity, and an air injection pipe connected to the lower cavity is provided on one side wall of the base, and the lower cavity is filled with a refrigerant; the problem of low heat dissipation efficiency of the existing radiator is solved, and the composite radiator has a compact structure and can better solve the problem of high-power heat dissipation within a limited installation space.

Description

Technical Field

[0001] The present invention relates to the technical field of radiators, and in particular to a composite radiator and a processing method thereof. Background Art

[0002] With the development trend of miniaturization and lightweight of electronic equipment and electronic components, the performance requirements and functional density of components are getting higher and higher. Due to the thermoelectric coupling characteristics of the components themselves, their own power consumption also increases. Among the common failures of electronic equipment, the reason why the equipment cannot work properly due to the excessive temperature of the electronic equipment accounts for a considerable proportion. Therefore, the temperature inside the electronic equipment must be strictly controlled to ensure that the heating components can operate normally and reliably. As the size of electronic products becomes smaller and smaller, the heat generated per unit space is getting larger and larger, which puts higher requirements on the radiator, and the use of good heat dissipation components is the only way to solve the above problems.

[0003] At present, the existing radiators are generally composed of aluminum (copper) plates, fins, and heat pipes, and are soldered by reflow soldering. The existing radiators cannot utilize the limited space of the product to solve the problem of high-power heat dissipation, resulting in the inability to quickly reduce the temperature of the heating components when the heating components are at high temperatures, thereby affecting the operating reliability of the components. Summary of the invention

[0004] The object of the present invention is to provide a composite radiator and a processing method thereof, aiming to solve the technical problem that the radiator in the prior art cannot have both small size and high heat dissipation efficiency.

[0005] The objective of the present invention can be achieved through the following technical scheme: a composite radiator, comprising an upper cover plate and a base, a plurality of first folded fins are arranged between the upper cover plate and the base, a first mounting groove is provided on the upper surface of the base between two adjacent first folded fins, each first mounting groove is inserted with mutually parallel first flat tubes, one end of the first flat tube is sealed with a first end cap which is plugged into and matched with the upper cover plate, the other end of the first flat tube is connected with a lower cavity provided at the bottom of the base, a lower cover plate is sealed at the opening of the lower cavity, a side wall of the base is provided with an injection pipe which is connected with the lower cavity, and the lower cavity is filled with refrigerant.

[0006] In the above technical solution: three locking holes are symmetrically provided on two opposite sides of the base, a second mounting groove connected to the lower cavity is provided between two adjacent locking holes, a second flat tube parallel to the first flat tube is inserted into the second mounting groove, one end of the second flat tube is connected to the lower cavity, and the other end of the second flat tube is sealed with a second end cover plugged into the upper cover plate, and a second folded fin is provided between the second flat tube and the first flat tube.

[0007] In the above technical solution, the first folded fin and the second folded fin both include a plurality of connected "bow"-shaped bending grooves, and the outer bending walls of the bending grooves are in contact with the surfaces of the first flat tube and the second flat tube.

[0008] In the above technical solution, a protective cover is provided on the upper surface of the upper cover plate, and bending parts corresponding to the second folded fins are provided on both sides of the protective cover, and the bending parts extend downward and cover the outer side surfaces of the second folded fins.

[0009] In the above technical solution, a heat conducting plate group is arranged in the lower cavity, and two ends of the heat conducting plate group are fixedly connected to the inner wall of the lower cavity and the lower cover plate respectively.

[0010] In the above technical solution, the heat conducting plate group includes a plurality of buckle fins connected in parallel, and the buckle fins are provided with a plurality of vertically bent connecting parts, and the gap formed between two adjacent connecting parts is aligned one by one with the first mounting groove and the second mounting groove.

[0011] In the above technical solution, the bottom surface of the lower cover plate is coated with thermal conductive paste.

[0012] The present invention also provides a method for processing a composite radiator, comprising the following steps:

[0013] a. Processing parts: A base is made of aluminum plate, a lower cavity is formed at the bottom of the base, a plurality of mutually parallel first mounting grooves are formed through the upper surface of the base, a second mounting groove is formed through between two adjacent locking holes, and a through hole connected to the lower cavity is formed on one side of the base;

[0014] Aluminum plate is used to make the lower cover plate, which is used to close the opening of the lower cavity;

[0015] Aluminum plates are used to make a plurality of first folded fins and second folded fins through folding and pressing;

[0016] Aluminum plates are used to make several buckle fins, several connecting parts are formed on the buckle fins by folding and pressing, and multiple buckle fins are connected together in parallel to assemble into a heat conducting sheet group;

[0017] A plurality of first flat tubes and second flat tubes made by aluminum extrusion;

[0018] Aluminum plates are used to make the first end cover and the second end cover, and buckling grooves corresponding to the ends of the first flat tube and the second flat tube are respectively provided on the first end cover and the second end cover;

[0019] An aluminum plate is used to make the upper cover plate, and a plug-in slot corresponding to the first end cover and the second end cover is provided on the upper cover plate;

[0020] Aluminum sheet is used to make the protective cover through folding and pressing;

[0021] An aluminum tube is used to make the gas injection pipe, and the gas injection pipe is installed in the through hole on the side of the base;

[0022] b. Assembly: Apply brazing paste to the corresponding contact areas of the prepared protective cover, upper cover, first end cover, second end cover, first folded fin, second folded fin, first flat tube, second flat tube, base and lower cover, and assemble them in corresponding positions. Place the assembled radiator in a high-temperature brazing furnace to form a composite radiator;

[0023] c. Filling refrigerant: Fill an appropriate amount of refrigerant into the lower cavity through the gas injection pipe, and seal the gas injection pipe after filling.

[0024] In the above technical solution, the protective cover and the lower cover plate assembled in the above step b are subjected to surface anodizing treatment.

[0025] In the above technical solution, a layer of thermal conductive paste is applied on the bottom surface of the lower cover.

[0026] Compared with the prior art, the present invention has the following beneficial effects: the heat on the heating component is transferred to the bottom of the first folded fin through the base, and at the same time, the refrigerant in the lower cavity absorbs heat and produces a phase change and then flows into the first flat tube, and the heat is transferred to the first folded fin by utilizing the phase change heat transfer characteristic of the refrigerant, which is beneficial to the uniformity of the overall heat dissipation, and the heat can be quickly diffused on the first fin under air convection, which greatly improves the heat dissipation efficiency and solves the problem of low heat dissipation efficiency of the existing radiator. In addition, the composite radiator has a compact structure and can better solve the problem of high-power heat dissipation within a limited installation space, so that the temperature of the heating component is controlled below the maximum temperature that can be tolerated or even lower, thereby enabling the heating component to perform better. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The present invention is further described using the accompanying drawings, but the embodiments in the accompanying drawings do not constitute any limitation to the present invention. A person skilled in the art can obtain other drawings based on the following drawings without creative work.

[0028] Figure 1 The figure is a schematic structural diagram of a composite heat sink according to an embodiment of the present invention.

[0029] Figure 2 for Figure 1 AA section view.

[0030] Figure 3 for Figure 1 Bottom view of .

[0031] Figure 4 The figure is an exploded view of a composite heat sink according to an embodiment of the present invention.

[0032] Figure 5It is a schematic structural diagram of a base in a composite heat sink according to an embodiment of the present invention.

[0033] Figure 6 The figure is a schematic diagram of the arrangement structure of the first folded fins and the second folded fins in a composite heat sink according to an embodiment of the present invention.

[0034] Figure 7 The figure is a schematic diagram of the structure of a buckle fin in a composite heat sink according to an embodiment of the present invention.

[0035] The numbers shown in the figure represent: 1. protective cover; 2. upper cover; 3. first end cover; 4. second end cover; 5. first folded fin; 6. second folded fin; 7. first flat tube; 8. second flat tube; 9. locking screw; 10. air injection pipe; 11. base; 12. heat conductive plate assembly; 13. lower cover; 14. thermal paste; 15. first mounting groove; 16. second mounting groove; 17. lower cavity; 18. locking hole; 19. buckle fin; 20. notch; 21. connecting part. DETAILED DESCRIPTION

[0036] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0037] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or suggesting their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in the field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0038] The technical solution of the present invention will be clearly and completely described below in conjunction with specific embodiments. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work belong to the protection scope of the present invention.

[0039] like Figures 1 to 7As shown, the structure of the present invention is: a composite radiator, including an upper cover plate 2 and a base 11, a plurality of first folded fins 5 are arranged between the upper cover plate 2 and the base 11, a first mounting groove 15 is provided on the upper surface of the base 11 between two adjacent first folded fins 5, each first mounting groove 15 is inserted with mutually parallel first flat tubes 7, one end of the first flat tube 7 is sealed with a first end cover 3 plugged with the upper cover plate 2, the other end of the first flat tube 7 is communicated with a lower cavity 17 opened at the bottom of the base 11, a lower cover plate 13 is sealed at the opening of the lower cavity 17, a side wall of the base 11 is provided with an injection pipe 10 communicated with the lower cavity 17, and the lower cavity 17 is filled with refrigerant.

[0040] In this embodiment, three locking holes 18 are symmetrically provided on two opposite sides of the base 11, and a second mounting groove 16 connected to the lower cavity 17 is provided between two adjacent locking holes 18. A second flat tube 8 parallel to the first flat tube 7 is inserted in the second mounting groove 16, and one end of the second flat tube 8 is connected to the lower cavity 17, and the other end of the second flat tube 8 is sealed with a second end cover 4 plugged into the upper cover plate 2, and a second folded fin 6 is provided between the second flat tube 8 and the first flat tube 7. The composite radiator has a compact structure. By providing the second flat tube 8 and the second folded fin 6, the heat dissipation surface area can be increased, which is beneficial to improving the heat dissipation efficiency. The first end cover 3 and the second end cover 4 are respectively sealed with the upper ends of the first flat tube 7 and the second flat tube 8 by welding, and the lower ends of the first flat tube 7 and the second flat tube 8 are respectively sealed with the first mounting groove 15 and the second mounting groove 16 by welding, thereby avoiding leakage of the refrigerant.

[0041] In this embodiment, the first folded fin 5 and the second folded fin 6 each include a plurality of connected "bow" shaped bending grooves, and the outer bending walls of the bending grooves are in contact with the surfaces of the first flat tube 7 and the second flat tube 8. The "bow" shaped bending grooves can increase the heat dissipation surface area within a limited space, thereby further improving the heat dissipation efficiency.

[0042] In this embodiment, a protective cover 1 is provided on the upper surface of the upper cover plate 2, and bending portions corresponding to the second folded fins 6 are provided on both sides of the protective cover 1. The bending portions extend downward and cover the outer side surfaces of the second folded fins 6. The first folded fins 5 and the second folded fins 6 of the radiator are protected by the protective cover 1 to prevent damage during the installation process.

[0043] In this embodiment, a heat conducting sheet group 12 is disposed in the lower cavity 17 , and two ends of the heat conducting sheet group 12 are fixedly connected to the inner wall of the lower cavity 17 and the lower cover plate 13 , respectively, so that the heat transfer efficiency is improved through the heat conducting sheet group 12 .

[0044] In this embodiment, the heat conductive plate group 12 includes a plurality of buckle fins 19 connected in parallel, and a plurality of vertically bent connecting portions 21 are provided on the buckle fins 19. The gap 20 formed between two adjacent connecting portions 21 is aligned one by one with the first mounting groove 15 and the second mounting groove 16. The buckle fins 19 are provided to help improve the heat transfer efficiency.

[0045] In this embodiment, the bottom surface of the lower cover plate 13 is coated with a thermal conductive paste 14, which fills the gap between the surface of the heat-generating component and the composite heat sink to conduct the heat emitted by the heat-generating component to the heat sink, so that the temperature of the heat-generating component is maintained at a level that can work stably, prevent damage due to poor heat dissipation, and extend the service life.

[0046] The present invention also provides a method for processing a composite radiator, comprising the following steps:

[0047] a. Processing parts: A base 11 is made of an aluminum plate with a thickness of 5 mm to 20 mm. A lower cavity 17 is provided at the bottom of the base 11. A plurality of mutually parallel first mounting grooves 15 are provided through the upper surface of the base 11. A second mounting groove 16 is provided between two adjacent locking holes 18. A through hole communicating with the lower cavity 17 is provided on one side of the base 11.

[0048] The lower cover plate 13 is made of an aluminum plate with a thickness of 1 mm to 5 mm, and the lower cover plate 13 is used to close the opening of the lower cavity 17;

[0049] A plurality of first folded fins 5 and second folded fins 6 are made of an aluminum plate with a thickness of 0.1 mm to 1 mm by folding and pressing;

[0050] A plurality of buckle fins 19 are made of aluminum plates with a thickness of 0.1 mm to 1 mm, and a plurality of connecting portions 21 are formed on the buckle fins 19 by folding and pressing, and a plurality of buckle fins 19 are connected together in parallel to form a heat conducting sheet group 12;

[0051] A plurality of first flat tubes 7 and second flat tubes 8 with a thickness of 2 mm to 10 mm are manufactured by aluminum extrusion;

[0052] Aluminum plates with a thickness of 2 mm to 10 mm are used to make the first end cover 3 and the second end cover 4, and buckling grooves corresponding to the ends of the first flat tube 7 and the second flat tube 8 are respectively provided on the first end cover 3 and the second end cover 4;

[0053] The upper cover plate 2 is made of an aluminum plate with a thickness of 1 mm to 5 mm, and a plug-in slot corresponding to the first end cover 3 and the second end cover 4 is provided on the upper cover plate 2;

[0054] The protective cover 1 is made by folding and pressing an aluminum plate with a thickness of 0.1 mm to 1 mm;

[0055] An aluminum tube with a length of 10 mm to 200 mm is selected to make the gas injection tube 10, and the gas injection tube 10 is installed in the through hole on the side of the base 11;

[0056] b. Assembly: Apply solder paste to the corresponding contact areas of the prepared protective cover 1, upper cover plate 2, first end cover 3, second end cover 4, first folded fin 5, second folded fin 6, first flat tube 7, second flat tube 8, base 11 and lower cover plate 13, and assemble them in corresponding positions. Place the assembled radiator in a high-temperature brazing furnace to form a composite radiator;

[0057] c. Filling refrigerant: Fill a proper amount of refrigerant into the lower cavity 17 through the gas injection pipe 10, and seal the gas injection pipe 10 after filling.

[0058] In this embodiment, the protective cover 1 and the lower cover plate 13 assembled in the above step b are subjected to surface anodization treatment.

[0059] In this embodiment, a layer of thermal conductive paste 14 is applied on the bottom surface of the lower cover plate 13 .

[0060] The composite heat sink may be made of materials with good thermal conductivity, such as gold, silver, aluminum, copper, etc. In this embodiment, it is preferably made of aluminum material with high cost performance.

[0061] In this embodiment of the invention, the refrigerant may be any cooling medium that dissipates heat through phase change and does not react with the heat sink material.

[0062] When in use, the lower cover plate 13 at the bottom of the composite radiator is closely fitted to the surface of the heat generating component, and then the locking screw 9 is passed through the locking hole 18 to fix it. When the heat generating component is in the working state, heat is generated, and then the heat is transferred to the lower cover plate 13. The heat on the lower cover plate 13 is quickly transferred to the base 11 through the heat conducting sheet group 12 arranged in the lower cavity 17. Then, the heat on the heat generating component is transferred to the bottom of the first folded fin 5 and the second folded fin 6 through the base 11. At the same time, the refrigerant in the lower cavity 17 absorbs heat and produces a phase change and then flows into the first flat tube 7 and the second flat tube 8, the heat is transferred to the first folded fin 5 and the second folded fin 6 by utilizing the heat transfer characteristic of the refrigerant phase change, which is beneficial to the uniformity of the overall heat dissipation. Under the air convection, the heat can be quickly diffused on the first fin 5 and the second folded fin 6, which greatly improves the heat dissipation efficiency and solves the problem of low heat dissipation efficiency of the existing radiator. In addition, the composite radiator has a compact structure and can better solve the problem of high-power heat dissipation within a limited installation space, so that the temperature of the heat-generating components can be controlled below the maximum temperature that can be tolerated or even lower, thereby enabling the heat-generating components to perform better.

[0063] The present invention is further described above with the aid of specific embodiments. However, it should be understood that the specific description here should not be construed as limiting the essence and scope of the present invention. Various modifications made to the above embodiments by ordinary technicians in the field after reading this specification are all within the scope of protection of the present invention.

Claims

1. A composite radiator, characterized in that: It comprises an upper cover plate (2) and a base (11), wherein a plurality of first folded fins (5) are arranged at intervals between the upper cover plate (2) and the base (11), and a first installation groove (15) is provided on the upper surface of the base (11) between two adjacent first folded fins (5), and each of the first installation grooves (15) is inserted with mutually parallel first flat tubes (7), and one end of the first flat tube (7) is sealed with a first end cover (3) plugged into and matched with the upper cover plate (2), and the other end of the first flat tube (7) is connected with a lower cavity (17) provided at the bottom of the base (11), and a lower cover plate (13) is sealed at the opening of the lower cavity (17), and a side wall of the base (11) is provided with an injection pipe (10) connected with the lower cavity (17), and the lower cavity (17) is filled with a refrigerant; Three locking holes (18) are symmetrically arranged on two opposite sides of the base (11); a second mounting groove (16) communicating with the lower cavity (17) is arranged between two adjacent locking holes (18); a second flat tube (8) parallel to the first flat tube (7) is inserted into the second mounting groove (16); one end of the second flat tube (8) is communicated with the lower cavity (17); the other end of the second flat tube (8) is sealed with a second end cover (4) pluggably matched with the upper cover plate (2); and a second folded fin (6) is arranged between the second flat tube (8) and the first flat tube (7); The first folded fin (5) and the second folded fin (6) both include a plurality of connected "bow"-shaped bending grooves, and the outer bending walls of the bending grooves are in contact with the surfaces of the first flat tube (7) and the second flat tube (8); A protective cover (1) is provided on the upper surface of the upper cover plate (2), and bent portions corresponding to the second folded fin (6) are provided on both sides of the protective cover (1), the bent portions extending downward and covering the outer side surfaces of the second folded fin (6).

2. A composite radiator according to claim 1, characterized in that: A heat conducting sheet group (12) is arranged in the lower cavity (17), and two ends of the heat conducting sheet group (12) are respectively fixedly connected to the inner wall of the lower cavity (17) and the lower cover plate (13).

3. A composite radiator according to claim 2, characterized in that: The heat conducting plate group (12) comprises a plurality of buckled fins (19) connected in parallel, the buckled fins (19) are provided with a plurality of vertically bent connecting portions (21), and the notches (20) formed between two adjacent connecting portions (21) are aligned one by one with the first mounting groove (15) and the second mounting groove (16).

4. The composite radiator according to claim 1, characterized in that: The bottom surface of the lower cover plate (13) is coated with thermal conductive paste (14).

5. A method for processing a composite heat sink according to any one of claims 1 to 4, characterized in that: The steps include: a. Processing parts: A base (11) is made of an aluminum plate, a lower cavity (17) is formed at the bottom of the base (11), a plurality of mutually parallel first mounting grooves (15) are formed through the upper surface of the base (11), a second mounting groove (16) is formed between two adjacent locking holes (18), and a through hole communicating with the lower cavity (17) is formed on one side of the base (11); The lower cover plate (13) is made of an aluminum plate, and the lower cover plate (13) is used to close the opening of the lower cavity (17); Aluminum plates are selected and formed by folding and pressing to form a plurality of first folded fins (5) and second folded fins (6); Aluminum plates are used to make a plurality of buckle fins (19), a plurality of connection parts (21) are formed on the buckle fins (19) by folding and pressing, and a plurality of buckle fins (19) are connected together in parallel to form a heat conducting plate group (12); a plurality of first flat tubes (7) and second flat tubes (8) are made by aluminum extrusion; Aluminum plates are used to make the first end cover (3) and the second end cover (4), and buckling grooves corresponding to the ends of the first flat tube (7) and the second flat tube (8) are respectively provided on the first end cover (3) and the second end cover (4); an aluminum plate is used to make the upper cover plate (2), and a plug-in groove corresponding to the first end cover (3) and the second end cover (4) is provided on the upper cover plate (2); A protective cover (1) is made of an aluminum plate by folding and pressing; An aluminum tube is selected to make an air injection pipe (10), and the air injection pipe (10) is installed in a through hole on the side of the base (11); b. Assembly: Apply solder paste to the corresponding contact areas of the prepared protective cover (1), upper cover plate (2), first end cover (3), second end cover (4), first folded fin (5), second folded fin (6), first flat tube (7), second flat tube (8), base (11) and lower cover plate (13), and assemble them in corresponding positions, and place the assembled radiator in a high-temperature brazing furnace to form a composite radiator; c. Filling refrigerant: filling a proper amount of refrigerant into the lower cavity (17) through the gas injection pipe (10), and sealing the gas injection pipe (10) after filling.

6. A method for processing a composite heat sink according to claim 5, characterized in that: The protective cover (1) and the lower cover plate (13) assembled in the above step b are subjected to surface anodizing treatment.

7. A method for processing a composite heat sink according to claim 6, characterized in that: A layer of heat-conducting paste (14) is applied on the bottom surface of the lower cover plate (13).

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