Radiator and manufacturing method thereof

Abstract

The invention aims to provide a radiator and a manufacturing method thereof, the radiator comprises a bottom frame and a radiating piece, one side surface of the bottom frame is provided with a concave cavity for accommodating a heating piece, one side surface, far away from the concave cavity, of the bottom frame is also provided with a step groove, and the inner bottom wall of the step groove is provided with a cavity hole communicated with the concave cavity; the heat dissipation piece comprises a heat conduction plate, a heat conduction protruding block and a plurality of heat dissipation teeth, the heat dissipation teeth are arranged on the same side face of the heat conduction plate at intervals, the heat conduction protruding block is arranged on the side face, away from the heat dissipation teeth, of the heat conduction plate, the heat conduction plate is contained in the step groove in a matched mode, and the heat conduction protruding block penetrates through the cavity hole. And the outer side wall of the heat conduction bump is hermetically connected with the inner side wall of the cavity hole. Thus, the radiator is arranged to be of a structure in which the bottom frame and the heat dissipation piece are combined and welded, the manufacturing difficulty of the radiator can be greatly reduced, the qualification rate of the radiator is effectively improved, batch production is facilitated, and meanwhile it can be effectively guaranteed that the manufactured radiator has excellent heat conduction and heat dissipation performance.

Description

Technical Field

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

[0002] A heat sink is a device designed to help heat dissipate from heat-generating components such as electronic devices. It is usually composed of a series of vertically or horizontally arranged heat dissipating teeth that can increase the contact area with the surrounding air, thereby accelerating the rate at which heat is transferred from the heat source to the air. The heat dissipating teeth are designed to maximize heat dissipation efficiency while maintaining structural stability and lightness.

[0003] At present, radiators are mainly made by aluminum extrusion, die casting, machining, scraping teeth (also called scraped radiators), etc. However, as the size of the radiator becomes larger and larger, and in order to better adapt to heat-generating parts such as electronic equipment to improve heat dissipation efficiency, the structure of the radiator becomes more and more complex, and the heat dissipation teeth become higher and higher. It is difficult to obtain the required specific structure using aluminum extrusion; and the die-casting one-piece molding method, as the size of the radiator increases and the structure is specific, the cost increases significantly, and the longer heat dissipation teeth increase the difficulty of demolding the mold, resulting in limited tooth height. The heat dissipation efficiency of the radiator made by die-casting one-piece molding is relatively low due to material reasons, and the pass rate of die-casting molding is also relatively low; although machining can carve out the shape required by the radiator, the processing efficiency is low and the mass production cost is too high; although scraping teeth can achieve high heat dissipation efficiency, it cannot be applied to components with slightly complex structures. In view of this, in order to solve the above problems, the radiator and its manufacturing method of the present application are proposed. Summary of the invention

[0004] The purpose of the present invention is to overcome the deficiencies in the prior art and to provide a heat sink and a manufacturing method thereof which are easy to manufacture, have a high pass rate, are convenient for mass production, and have better thermal conductivity.

[0005] The objective of the present invention is achieved through the following technical solutions:

[0006] A radiator, comprising:

[0007] A bottom frame, wherein a concave cavity for accommodating a heating element is formed on one side of the bottom frame, a step groove is formed on a side of the bottom frame away from the concave cavity, and a cavity hole communicating with the concave cavity is formed on an inner bottom wall of the step groove; and

[0008] The heat sink comprises a heat conducting plate, a heat conducting protrusion and a plurality of heat dissipation teeth, wherein the heat dissipation teeth are arranged at intervals on the same side of the heat conducting plate, the heat conducting protrusion is arranged on the side of the heat conducting plate away from the heat dissipation teeth, the heat conducting plate is adaptively accommodated in the step groove, the heat conducting protrusion is penetrated through the cavity, and the outer wall of the heat conducting protrusion is sealed and connected with the inner wall of the cavity.

[0009] Optionally, the outer wall of the thermally conductive bump is welded to the inner wall of the cavity.

[0010] Optionally, the outer wall of the thermally conductive bump and the inner wall of the cavity are welded by friction stir welding.

[0011] Optionally, the bottom frame includes a frame body and two surrounding blocks, the concave cavity, the step groove and the cavity hole are all located on the frame body, the two surrounding blocks are both arranged on a side surface of the frame body close to the step groove, and the two surrounding blocks are located on opposite sides of the step groove.

[0012] Optionally, two external connection ears are arranged at intervals on an outer side wall of the frame.

[0013] Optionally, the frame body, the surrounding block, and the external ear are integrally formed into the bottom frame by die-casting.

[0014] Optionally, a closed sealing groove is formed on the frame body around the concave cavity.

[0015] Optionally, the frame is further provided with a plurality of locking holes which are spaced apart from each other.

[0016] Optionally, a protective layer is provided on the surface of the heat sink.

[0017] A method for manufacturing a heat sink, used to manufacture any of the above heat sinks, comprises the following steps:

[0018] Step S10: manufacturing a bottom frame by die-casting, wherein a concave cavity is formed on one side surface of the bottom frame, a step groove is formed on the other side surface, and a cavity hole communicating with the concave cavity is formed on the inner bottom wall of the step groove;

[0019] Step S20: obtaining a heat sink, wherein the heat sink comprises a heat conducting plate, a heat conducting protrusion, and a plurality of heat dissipation teeth, wherein the heat conducting protrusion is located on one side of the heat conducting plate, and each of the heat dissipation teeth is located on the other side of the heat conducting plate;

[0020] Step S30: placing the heat sink on the bottom frame so that the heat conducting plate is accommodated in the step groove and the heat conducting protrusion is inserted into the cavity hole;

[0021] Step S40: sealingly connecting the outer wall of the heat-conducting bump to the inner wall of the cavity to obtain a heat sink.

[0022] Compared with the prior art, the present invention has at least the following advantages:

[0023] The heat sink and its manufacturing method of the present invention include a bottom frame and a heat sink. A concave cavity for accommodating a heating element is provided on one side of the bottom frame. A step groove is also provided on a side of the bottom frame away from the concave cavity. A cavity hole connected to the concave cavity is provided on the inner bottom wall of the step groove. The heat sink includes a heat conducting plate, a heat conducting protrusion and a plurality of heat dissipating teeth. The heat dissipating teeth are arranged at intervals on the same side of the heat conducting plate. The heat conducting protrusion is arranged on the side of the heat conducting plate away from the heat dissipating teeth. The heat conducting plate is adaptively accommodated in the step groove, and the heat conducting protrusion is penetrated through the cavity hole, and the outer wall of the heat conducting protrusion is sealed and connected with the inner wall of the cavity hole. In this way, the radiator is configured as a structure in which a base frame and a heat sink are installed in combination, wherein the heat sink can be manufactured by aluminum extrusion, copper or aluminum machining, skiving, or even die-casting of high thermal conductivity materials, while the base frame is manufactured by die-casting. Therefore, even if the structure of the base frame is peculiarly designed, it can greatly reduce the manufacturing difficulty of the radiator, effectively improve the qualification rate of the radiator, facilitate mass production, and effectively ensure that the assembled radiator has excellent thermal conductivity and heat dissipation performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments are briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without creative work.

[0025] Figure 1 It is a structural schematic diagram of a radiator according to an embodiment of the present invention;

[0026] Figure 2 for Figure 1 An exploded view of the heat sink is shown;

[0027] Figure 3 for Figure 1 An exploded view of the heat sink shown from another angle;

[0028] Figure 4 for Figure 1 A schematic cross-sectional structure diagram of a radiator shown;

[0029] Figure 5 for Figure 1 The manufacturing method of the heat sink is shown in the flowchart.

[0030] Description of reference numerals:

[0031] 10. Radiator; 100. Bottom frame; 200. Heat sink; 111. Concave cavity; 112. Step groove; 113. Cavity hole; 210. Heat conducting plate; 220. Heat conducting protrusion; 230. Heat dissipation tooth; 110. Frame; 120. Surrounding block; 130. External ear; 114. Sealing groove; 115. Locking hole. DETAILED DESCRIPTION

[0032] In order to facilitate the understanding of the present invention, the present invention will be described more comprehensively with reference to the accompanying drawings. The accompanying drawings show preferred embodiments of the present invention.

[0033] In the description of the embodiments of the present invention, it should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the embodiments of the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0034] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the embodiments of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0035] In the embodiments of the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection or a detachable connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the embodiments of the present invention can be understood according to specific circumstances.

[0036] like Figures 1 to 4As shown, a heat sink 10 includes a base frame 100 and a heat sink 200. A concave cavity 111 for accommodating a heating element is provided on one side of the base frame 100. A step groove 112 is provided on a side of the base frame 100 away from the concave cavity 111. A cavity 113 connected to the concave cavity 111 is provided on the inner bottom wall of the step groove 112. The heat sink 200 includes a heat conducting plate 210, a heat conducting protrusion 220 and a plurality of heat dissipation teeth 230. The heat dissipation teeth 230 are arranged at intervals on the same side of the heat conducting plate 210. The heat conducting protrusion 220 is arranged on the side of the heat conducting plate 210 away from the heat dissipation teeth 230. The heat conducting plate 210 is adaptively accommodated in the step groove 112, and the heat conducting protrusion 220 is penetrated through the cavity 113, and the outer wall of the heat conducting protrusion 220 is sealed and connected to the inner wall of the cavity 113.

[0037] It should be noted that the heating element of the electronic device is installed in the concave cavity 111 so that the heating element is in full contact with the radiator 10. A step groove 112 is provided on the other side of the bottom frame 100, and a cavity hole 113 connected to the concave cavity 111 is provided on the inner bottom wall of the step groove 112. Furthermore, the heat-conducting protrusion 220 is located on one side of the heat-conducting plate 210, and each heat-dissipating tooth 230 is located on the other side of the heat-conducting plate 210, and each heat-dissipating tooth 230 is distributed at intervals. In this way, the heat sink 200 and the bottom frame 100 are separate and independent structures and can be processed and manufactured separately. After the bottom frame 100 and the heat sink 200 are manufactured, the heat sink 200 is installed in the bottom frame 100. Specifically, the heat conducting plate 210 is embedded in the step groove 112, so that the heat conducting protrusion 220 passes through the cavity hole 113, and the surface of the heat conducting protrusion 220 is flush with the inner bottom wall of the cavity 111, and then the outer wall of the heat conducting protrusion 220 is sealed and connected with the inner wall of the cavity hole 113 to form a combined structure heat sink 10. In this way, the heat sink 10 is set as a structure in which the bottom frame 100 and the heat sink 200 are installed in combination, wherein the heat sink 200 is used as the heat dissipation body. In order to improve the heat dissipation efficiency, a high thermal conductivity material is selected. The heat sink 200 can be manufactured by aluminum extrusion, copper or aluminum machining, tooth skiving, or even high thermal conductivity material die-casting, and the bottom frame 100 is used to connect the heat sink 200 and the equipment body and ensure their relative position and structural accuracy. Therefore, the bottom frame 100 has lower requirements on the heat dissipation efficiency relative to the heat sink 200, and can be manufactured by die-casting using materials that are easy to die-cast. Therefore, even if the structure of the bottom frame 100 is specifically designed to suit the installation occasion, it can greatly reduce the manufacturing difficulty of the radiator 10, effectively improve the qualified rate of the radiator 10, facilitate mass production, and effectively ensure that the assembled radiator 10 has excellent thermal conductivity and heat dissipation properties.

[0038] In one embodiment, when the heat sink 200 is a shovel-toothed heat sink 230 , especially when the heat sink teeth 230 are high, dense, and thin, in order to prevent them from being deformed or even broken, a ventilated and breathable protective cover may be provided on the heat sink 200 to protect the heat sink teeth 230 .

[0039] In one embodiment, the thermally conductive bump 220 can be bonded to the outer wall and the cavity 113 by means of a sticky thermally conductive adhesive, so that the thermally conductive bump 220 and the bottom frame 100 are sealed and installed, while ensuring that heat can be stably transferred from the bottom frame 100 to the heat sink 200.

[0040] Furthermore, in one embodiment, the heat sink 200 and the bottom frame 100 may be locked and connected by fasteners such as bolts, wherein the heat sink 200 and the bottom frame 100 are sealed and connected by a sealing ring.

[0041] Furthermore, in one embodiment, the outer wall of the heat-conducting protrusion 220 is welded to the inner wall of the cavity 113, so as to ensure good sealing between the heat-conducting protrusion 220 and the bottom frame 100, and ensure the heat conduction efficiency between the bottom frame 100 and the heat-conducting protrusion 220. For example, the heat-conducting protrusion 220 and the inner wall of the cavity 113 can be welded by arc welding, laser welding, electron beam welding, resistance welding, gas welding, friction welding, and stir friction welding. In particular, the welding quality of stir friction welding is stable, and there will be no defects such as pores and cracks in common welding. It has good sealing and can effectively improve the mechanical properties between the heat-conducting protrusion 220 and the bottom frame 100. Therefore, it is preferred to stir friction welding to seal the heat-conducting protrusion 220 and the bottom frame 100.

[0042] like Figures 1 to 4 As shown, in one embodiment, the bottom frame 100 includes a frame body 110 and two surrounding blocks 120, the concave cavity 111, the step groove 112 and the cavity hole 113 are all located on the frame body 110, the two surrounding blocks 120 are both arranged on a side surface of the frame body 110 close to the step groove 112, and the two surrounding blocks 120 are located on opposite sides of the step groove 112.

[0043] It should be noted that the block 120 is located on the side surface of the frame 110 close to the step groove 112. In this way, when the heat sink 200 is installed in the step groove 112, the two blocks 120 are located on both sides of each heat dissipation tooth 230. And the extension line of the length extension direction of the block 120 is parallel to the extension line of the length extension direction of the heat dissipation tooth 230. In this way, the block 120 is used to protect each heat dissipation tooth 230, which can prevent the block 120 from being deformed due to collision. Further, in one embodiment, the thickness of the block 120 gradually decreases in the direction away from the frame 110. In this way, when the bottom frame 100 is manufactured by die casting, it is convenient to demold the block 120. In one embodiment, the minimum thickness of the block 120 is greater than the thickness of the heat dissipation tooth 230. In this way, the block 120 can effectively protect the heat dissipation tooth 230.

[0044] like Figure 1 As shown, in one embodiment, two external ears 130 are disposed on an outer side wall of the frame body 110 and are spaced apart from each other.

[0045] It should be noted that, since the concave cavity 111 is used to accommodate a relatively large heating element, in order to facilitate the installation or removal of the heat sink 10 and the heating element, two spaced apart external ears 130 are provided on the outer side wall of the frame 110. In this way, the frame 110 and the heating element can be hingedly installed through the external ears 130, so that the frame 110 can be buckled on the heating element or opened from the heating element.

[0046] Furthermore, in one embodiment, the frame 110, the surrounding block 120, and the external ear 130 are integrally formed into the bottom frame 100 by die casting. In this way, the bottom frame 100 made by die casting has sufficient structural strength between the frame 110, the surrounding block 120, and the external ear 130.

[0047] like Figure 3 and Figure 4 As shown, in one embodiment, a closed sealing groove 114 is formed on the frame 110 around the concave cavity 111 .

[0048] In this way, when the heat sink 10 is installed on a heat generating element for use, a sealing ring is installed in the sealing groove 114 to ensure that a good sealing environment is maintained in the cavity 111 .

[0049] like Figure 1 As shown, in one embodiment, a plurality of locking holes 115 are provided at intervals on the frame body 110. Thus, the locking holes 115 are used to pass screws, so that the bottom frame 100 is easy to install.

[0050] In one embodiment, a protective layer is provided on the surface of the radiator 10. For example, the surface of the radiator 10 can be formed with a protective layer by anodizing, sandblasting, spraying, nickel plating or chrome plating, chemical conversion coating, or wire drawing. In the present application, spraying is preferably used to form a protective layer on the surface of the radiator 10, so that the overall heat dissipation efficiency, corrosion resistance, and wear resistance of the radiator 10 can be further improved.

[0051] like Figure 5 As shown, a method for manufacturing a heat sink comprises the following steps:

[0052] Step S10: manufacturing a bottom frame by die-casting, wherein a concave cavity is formed on one side surface of the bottom frame, a step groove is formed on the other side surface, and a cavity hole communicating with the concave cavity is formed on the inner bottom wall of the step groove;

[0053] Step S20: obtaining a heat sink, wherein the heat sink includes a heat conducting plate, a heat conducting protrusion, and a plurality of heat dissipation teeth, wherein the heat conducting protrusion is located on one side of the heat conducting plate, and each heat dissipation tooth is located on the other side of the heat conducting plate;

[0054] Step S30: placing the heat sink on the bottom frame so that the heat conducting plate is accommodated in the step groove and the heat conducting protrusion is passed through the cavity hole;

[0055] Step S40: sealingly connecting the outer wall of the heat-conducting bump to the inner wall of the cavity to obtain a heat sink.

[0056] It should be noted that the bottom frame is integrally formed by die-casting, which can improve the manufacturing efficiency of the bottom frame and effectively ensure the structural dimensions of the bottom frame and the overall structural strength of the bottom frame. For example, the bottom frame can be die-cast using ADC12 aluminum, so that it has good casting performance, high mechanical strength, and can withstand a certain load. In this way, the independent heat sink and the bottom frame are sealed and installed as a radiator in an integral state. The bottom frame can be designed as any specific structure according to the different heat sinks, which can effectively ensure the heat dissipation efficiency of the radiator while reducing the difficulty of manufacturing the radiator.

[0057] Furthermore, in one embodiment, in step S20, obtaining the heat sink is specifically to manufacture the heat sink by one of processes such as aluminum extrusion, copper or aluminum machining, tooth skiving, or even high thermal conductivity material die casting.

[0058] It should be noted that in this embodiment, the heat sink is made by aluminum extrusion, copper or aluminum machining, shoveling, or even high thermal conductivity material die casting. For example, the heat sink can be made of A6063 aluminum and copper. It has excellent extrusion performance, good corrosion resistance, good welding performance, and can also improve strength through heat treatment.

[0059] Further, in one embodiment, in step S40, sealingly connecting the outer wall of the thermally conductive bump to the inner wall of the cavity hole is specifically performed by sealingly connecting the outer wall of the thermally conductive bump to the inner wall of the cavity hole by friction stir welding.

[0060] It should be noted that the heat-conducting bump and the bottom frame are welded and fixed by the friction stir welding process, which, on the one hand, ensures sufficient sealing between the heat sink and the bottom frame, and on the other hand, allows the heat of the bottom frame to be quickly transferred to the heat sink for heat dissipation.

[0061] The above-described embodiments only express several implementation methods of the present invention, and the descriptions thereof are relatively specific and detailed, but they cannot be construed as limiting the scope of the invention patent. The installation / fixing / setting mentioned in the present invention, unless otherwise specifically defined, may be understood to include but not be limited to locking and fixing with screws / screws, and welding. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements may be made without departing from the concept of the present invention, and these all fall within the scope of protection of the present invention. Therefore, the scope of protection of the patent of the present invention shall be subject to the attached claims.

Claims

1. A radiator, characterized in that: include: A bottom frame, wherein a concave cavity for accommodating a heating element is formed on one side of the bottom frame, a step groove is formed on a side of the bottom frame away from the concave cavity, and a cavity hole communicating with the concave cavity is formed on an inner bottom wall of the step groove; and The heat sink comprises a heat conducting plate, a heat conducting protrusion and a plurality of heat dissipation teeth, wherein the heat dissipation teeth are arranged at intervals on the same side of the heat conducting plate, the heat conducting protrusion is arranged on the side of the heat conducting plate away from the heat dissipation teeth, the heat conducting plate is adaptively accommodated in the step groove, the heat conducting protrusion is penetrated through the cavity, and the outer wall of the heat conducting protrusion is sealed and connected with the inner wall of the cavity.

2. The heat sink according to claim 1, characterized in that: The outer wall of the heat-conducting protrusion is welded to the inner wall of the cavity.

3. The heat sink according to claim 2, characterized in that: The outer wall of the heat-conducting protrusion and the inner wall of the cavity are welded by friction stir welding.

4. The heat sink according to claim 3, characterized in that: The bottom frame includes a frame body and two surrounding blocks. The concave cavity, the step groove and the cavity hole are all located on the frame body. The two surrounding blocks are both arranged on a side surface of the frame body close to the step groove, and the two surrounding blocks are located on opposite sides of the step groove.

5. The heat sink according to claim 4, characterized in that: Two spaced-apart external connection ears are arranged on an outer side wall of the frame.

6. The heat sink according to claim 5, characterized in that: The frame body, the surrounding block, and the external ear are integrally formed into the bottom frame by die-casting.

7. The heat sink according to claim 6, characterized in that The frame body is provided with a closed sealing groove surrounding the concave cavity.

8. The heat sink according to claim 6, characterized in that The frame is also provided with a plurality of locking holes which are distributed at intervals.

9. The heat sink according to claim 6, characterized in that: A protective layer is arranged on the surface of the radiator.

10. A method for manufacturing a heat sink, used for manufacturing the heat sink according to any one of claims 6 to 9, characterized in that: The steps include: Step S10: manufacturing a bottom frame by die-casting, wherein a concave cavity is formed on one side surface of the bottom frame, a step groove is formed on the other side surface, and a cavity hole communicating with the concave cavity is formed on the inner bottom wall of the step groove; Step S20: obtaining a heat sink, wherein the heat sink comprises a heat conducting plate, a heat conducting protrusion, and a plurality of heat dissipation teeth, wherein the heat conducting protrusion is located on one side of the heat conducting plate, and each of the heat dissipation teeth is located on the other side of the heat conducting plate; Step S30: placing the heat sink on the bottom frame so that the heat conducting plate is accommodated in the step groove and the heat conducting protrusion is inserted into the cavity hole; Step S40: sealingly connecting the outer wall of the heat-conducting bump to the inner wall of the cavity to obtain a heat sink.

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