Laser heat dissipation module and heat dissipation method

Abstract

The invention discloses a laser heat dissipation module and a heat dissipation method, and relates to the technical field of lasers, the laser heat dissipation module comprises a laser arranged on a support and a heat dissipation assembly detachably connected with the laser; the heat dissipation assembly comprises a fan, a heat conduction module and a fin set composed of a plurality of fins, the fin set is arranged on the heat conduction module, the fan is arranged on the side, away from the heat conduction module, of the fin set, and the heat conduction module and the fan are both in the normal direction with the fins. By the adoption of the double-air-path structural design, the circulation path of air between the fins is shortened, so that the retention time of hot air between the fins is shortened, and the situation that the heat dissipation efficiency is reduced due to the fact that the temperature of the air gradually rises in the circulation process is avoided. In addition, due to the fact that the air circulation path is short, the installation direction of the fan does not need to be considered, and therefore heat dissipation can be conducted no matter the fan rotates forwards or backwards.

Description

Technical Field

[0001] The present invention relates to the field of laser technology, and more specifically, to a laser heat dissipation module and a heat dissipation method. Background Art

[0002] A laser is a device that uses the direct transition of atoms, ions or molecules in a laser medium to radiate coherent light for amplification. During the operation of the laser, due to the large amount of energy accumulation and high-power output, the laser will generate a lot of heat. In order to ensure the stable operation and extend the life of the laser, the laser needs to be cooled. The commonly used cooling method is air cooling with a fan blowing directly on the heat sink. However, after a period of time, the cooling efficiency of this method will drop significantly, because the air flows through the gap between the fins for a long distance. When the laser continues to run, the temperature of the fins will be very high, and the fin spacing is small, so that the air will be heated when it just enters the fins, which is equivalent to air cooling. In fact, it can only barely cool down the fins in the first half of the heat dissipation channel. Because the air temperature has risen, the cooling efficiency of the fins in the second half will be greatly reduced. Therefore, how to maintain the cooling efficiency stable and reduce the air circulation time between the fins without increasing the fan speed is the technical problem to be solved by the present invention. Summary of the invention

[0003] A series of simplified concepts are introduced in the Summary of the Invention, which will be further described in detail in the Detailed Description of the Invention. The Summary of the Invention does not mean to attempt to define the key features and essential technical features of the claimed technical solution, nor does it mean to attempt to determine the scope of protection of the claimed technical solution.

[0004] In order to at least partially solve the above problems, the present invention provides a laser heat dissipation module, comprising: a laser arranged on a bracket, and a heat dissipation component detachably connected to the laser; the heat dissipation component comprises a fin group consisting of a fan, a heat conduction module, and a plurality of fins, the fin group is arranged on the heat conduction module, the fan is arranged on a side of the fin group away from the heat conduction module, and the heat conduction module and the fan are both normal to the fins.

[0005] Preferably, the heat conduction module comprises a heat conduction plate, the fin group is arranged on the heat conduction plate, and the fin group is connected to the laser through the heat conduction plate.

[0006] Preferably, the heat conduction module also includes a heat pipe, a plurality of first grooves are provided on a side of the heat conduction plate away from the laser, a plurality of second grooves are provided on a side where the fin group is connected to the heat conduction plate, the number and shape of the second grooves are adapted to the first grooves, and when the fin group is connected to the heat conduction plate, the first groove and the second groove constitute a first assembly hole, and the heat pipe passes through the first assembly hole.

[0007] Preferably, the fin group is further provided with a plurality of second assembly holes, the number of the second assembly holes matches the number of the first assembly holes, and the heat pipe runs through the first assembly holes and the second assembly holes.

[0008] Preferably, the fin group is a cube composed of a number of rectangular fins, one side of the fin is connected to the heat conduction plate, and two adjacent fins form three air outlets, namely the first air outlet, the second air outlet and the third air outlet. A fan is provided on the side opposite to the fin and the heat conduction plate, and the air outlet provided with the fan is the first air outlet, and the second air outlet and the third air outlet are respectively located on two opposite sides, a first air path is formed between the first air outlet and the second air outlet, and a second air path is formed between the first air outlet and the third air outlet.

[0009] Preferably, the heat conduction module further includes a heat pipe, the fin group is provided with at least one third assembly hole, the heat conduction plate is provided with an open groove connected to the third assembly hole, the heat pipe is arranged in the third assembly hole, and the heat pipe is perpendicular to the fin.

[0010] Preferably, there are two heat conducting plates, which are respectively arranged on two opposite sides of the fin group, one heat conducting plate is connected to the laser, and the other heat conducting plate is connected to the fan.

[0011] Preferably, a heat-conducting shell is provided at the edge of the heat-conducting plate, the fin group and the fan are both provided in the heat-conducting shell, and the air inlet or air outlet of the fan faces the heat-conducting plate; When the air inlet of the fan faces the heat transfer plate, air flows from the fin group through the heat transfer plate to the air inlet of the fan; When the air outlet of the fan faces the heat transfer plate, air flows from the air outlet of the fan through the heat transfer plate to the fin assembly.

[0012] Preferably, a side wall of the heat-conducting shell is provided with a plurality of through holes, and the through holes are located on a side of the heat-conducting shell away from the fin assembly.

[0013] A heat dissipation method for a laser heat dissipation module, wherein the two end surfaces of the laser are respectively a light emitting surface and a heat generating surface, the heat generating surface of the laser is mounted on a heat conducting module, the heat of the laser is transferred to a fin assembly via the heat conducting module, and the heat is dissipated via a fan.

[0014] Compared with the prior art, the present invention has at least the following beneficial effects: The present invention adopts a double air path structural design to reduce the air circulation distance between the fins, thereby reducing the residence time of hot air between the fins, and avoiding the decrease in heat dissipation efficiency due to gradual temperature increase of the air during circulation. In addition, because the air circulation distance of the present invention is shorter, it is not necessary to consider the installation direction of the fan, so that heat can be dissipated regardless of the forward or reverse rotation of the fan.

[0015] The laser heat dissipation module and heat dissipation method described in the present invention, and other advantages, objectives and features of the present invention will be reflected in part through the following description, and in part will also be understood by technicians in this field through research and practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings: Figure 1 This is a schematic diagram of a first embodiment of the laser heat dissipation module described in the present invention.

[0017] Figure 2 for Figure 1 Exploded diagram.

[0018] Figure 3 It is an exploded view of the fin group in the first embodiment of the present invention.

[0019] Figure 4 This is an air flow diagram when the fan outlet faces the laser (A) and when the fan inlet faces the laser (B) in the first embodiment.

[0020] Figure 5 It is a cross-sectional view of the first embodiment.

[0021] Figure 6 Schematic diagram of a heat dissipation assembly in a second embodiment of the present invention.

[0022] Figure 7 for Figure 6 Exploded view of the laser and fin assembly (fan not shown).

[0023] Figure 8 for Figure 7 Exploded view of the middle fin group (laser not shown).

[0024] Fig. 9 Schematic diagram of a heat dissipation assembly in a third embodiment of the present invention.

[0025] Fig.10 It is a cross-sectional view and air circulation schematic diagram of the third embodiment.

[0026] In the figure: 1 bracket, 2 laser, 3 fan, 4 fin group, 41 second groove, 42 second assembly hole, 43 third assembly hole, 5 heat conducting plate, 51 first groove, 52 open groove, 6 heat pipe, 7 heat conducting shell, 71 through hole. DETAILED DESCRIPTION

[0027] The present invention is further described in detail below in conjunction with the accompanying drawings and embodiments so that those skilled in the art can implement the invention with reference to the description.

[0028] It should be understood that the terms such as “having”, “including” and “comprising” used herein do not exclude the existence or addition of one or more other elements or combinations thereof.

[0029] like Figure 1-Figure 10 As shown, the present invention provides a laser heat dissipation module, comprising: a laser 2 arranged on a bracket 1, and a heat dissipation component detachably connected to the laser 2; the heat dissipation component comprises a fan 3, a heat conduction module, and a fin group 4 composed of a plurality of fins, the fin group 4 is arranged on the heat conduction module, the heat conduction module is used to uniformly transfer the heat of the laser 2 to each fin of the fin group 4, the fan 3 is arranged on a side of the fin group 4 away from the heat conduction module, the heat conduction module and the fan 3 are both normal to the fins, as shown in FIG. Figure 1 , 2, 5. The heat conduction module includes a heat conduction plate 5, which is made of copper or aluminum. The fin group 4 is arranged on the heat conduction plate 5, and the fin group 4 is connected to the laser 2 through the heat conduction plate 5. The heat conduction module also includes a heat pipe 6. The side of the heat conduction plate 5 away from the laser 2 is provided with a plurality of first grooves 51, and the side of the fin group 4 connected to the heat conduction plate 5 is provided with a plurality of second grooves 41. The number and shape of the second grooves 41 are adapted to the first grooves 51. When the fin group 4 is connected to the heat conduction plate 5, the first groove 51 and the second groove 41 constitute a first assembly hole, and the heat pipe 6 passes through the first assembly hole. The fin group 4 is also provided with a plurality of second assembly holes 42, and the number of the second assembly holes 42 is adapted to the number of the first assembly holes. The heat pipe 6 is "U"-shaped and passes through the first assembly hole and the second assembly hole 42. One end of the heat pipe 6 is embedded in the second assembly hole 42 formed by the heat conducting plate 5 and the fin group 4, and the other end passes through the first assembly hole formed by the heat conducting plate 5 and the fin group 4. The heat conducting plate 5, the heat pipe 6 and the fins of the fin group 4 can be fixed together by welding; there are usually four heat pipes 6, which can quickly transfer the heat on the heat conducting plate 5 to the fins of the fin group 4, greatly accelerating the heat dissipation speed. The fin group 4 is a cube composed of a number of rectangular fins, so a rectangular air circulation space is formed between two adjacent fins. Because one side of the fin is connected to the heat conducting plate 5, the rectangular circulation space has only three air outlets, namely the first air outlet, the second air outlet and the third air outlet. Usually, a fan 3 is provided on the side opposite to the fin and the heat conducting plate 5, and the air outlet provided with the fan 3 is the first air outlet, and the second air outlet and the third air outlet are respectively located on the opposite sides, such as Figure 5 As shown, air flows from one air outlet to other air outlets to form an air path, and a first air path is formed between the first air outlet and the second air outlet. Air can flow from the first air outlet to the second air outlet, or from the second air outlet to the first air outlet. The specific air flow direction is determined by whether the air outlet or the air inlet of the fan 3 is set on the first air outlet. Similarly, a second air path is formed between the first air outlet and the third air outlet. It should be noted that although the air outlet and the air path are located between two adjacent fins, because the fin group 4 is composed of multiple fins, the fin group 4 as a whole can also be regarded as three air outlets and two air paths.

[0030] A heat dissipation method for a laser heat dissipation module, wherein the two end surfaces of the laser 2 are respectively a light emitting surface and a heat generating surface, the heat generating surface of the laser 2 is mounted on a heat conducting module, the heat of the laser 2 is transferred to a fin group 4 via the heat conducting module, and is dissipated via a fan 3. The present invention is a dual air path structure having a first air path and a second air path. The forward and reverse installation of the fan 3 determines the flow direction of the air.

[0031] Take the first air path as an example: the air enters the air inlet of the fan 3 under the action of the fan 3, and then blows into the first air outlet through the air outlet of the fan 3, and then the heat generated by the laser 2 is discharged through the second air outlet; if the fan 3 is installed in reverse, the air enters the fin group 4 through the second air outlet under the action of the fan 3, passes through the first air outlet of the fin group 4 and enters the air inlet of the fan 3, and then the heat generated by the laser 2 is discharged through the air outlet of the fan 3; the second air path is similar, such as Figure 4 As shown, Figure 4 (A) is a schematic diagram of air flow in two air paths when the air outlet of fan 3 is at the first air outlet. Figure 4 (B) is a schematic diagram of air flow in two air paths when the air inlet of the fan 3 is at the first air outlet.

[0032] The working principle and beneficial effects of the above technical solution: The present invention adopts a dual air path structural design to reduce the air circulation distance between the fins, thereby reducing the residence time of hot air between the fins, and avoiding the decrease in heat dissipation efficiency due to the gradual increase in air temperature during the circulation process. In addition, because the air circulation distance of the present invention is short, it is not necessary to consider the installation direction of the fan 3, so that heat can be dissipated regardless of the forward or reverse rotation of the fan.

[0033] In the previous embodiment, we provided a dual air path structure design to shorten the air movement distance between the fins, but this embodiment adopts an integrated fin group 4, and the flow distribution of the two air paths depends entirely on the installation position of the fan 3, that is, Figure 4 As shown in the figure, if the fan 3 is installed to the left, the travel of the left wind path will be significantly shorter than that of the right wind path, and the heat pipe 6 inserted in the path of the wind path will also cause uneven flow distribution. At the same time, because the heat pipe 6 is only connected to the heat conducting plate 5 and the fin group 4, the cooling effect of the heat pipe 6 itself is weak, so we provide a second implementation method. In this embodiment, the heat conduction module also includes a heat pipe 6, and the cross-section of the heat pipe 6 is flat, such as Figure 6-Figure 8As shown, at least one third assembly hole 43 is provided on the fin group 4, and an open groove 52 connected to the third assembly hole 43 is provided on the heat conducting plate 5. The heat pipe 6 is arranged in the third assembly hole 43, so that a part of the heat pipe 6 can be exposed to the external environment through the open groove 52 without contacting the fan 3, and the heat pipe 6 is perpendicular to the surface of the fin. There are two heat conducting plates 5, which are respectively arranged on two opposite surfaces of the fin group 4, one heat conducting plate 5 is connected to the laser 2, and the other heat conducting plate 5 is connected to the fan 3. In this embodiment, the heat conducting plate 5 is located at the center of the surface of the fin group 4, and the heat conducting plate 5 divides the fin group 4 into two parts that are not connected to each other. Therefore, through structural design, the wind path is artificially divided, thereby reducing the influence of the fan 3 caused by different installation positions, because the open groove 52 is provided, and the open groove is arranged in the same direction as the heat pipe 6, and the two ends of the open groove 52 extend to the two end surfaces of the third assembly hole 43 of the fin group 4, as shown in FIG. Figure 6-Figure 8 As shown, the open slot 52 becomes the third air path, so that the fan 3 can also cool the heat pipe 6, and the other heat conducting plate 5 can not only meet the heat conduction from the laser 2 to the heat pipe 6, but also form an air path for air circulation through the open slot 52 on this side. It should be noted that in order to ensure the heat conduction efficiency, the heat conducting plate 5 connected to the laser 2 may not be provided with the open slot 52, or the heat pipe 6 may be directly in contact with the laser 2 through the open slot 52.

[0034] In the first two embodiments, we adopted a dual air path structural design to shorten the distance of air between the fins. Because the heat pipe 6 needs to be set, the overall volume of the present invention will be larger, and there is a risk of bending and damaging the fins by drilling holes in the fins. For this reason, we provide a third embodiment in the hope that the distance of air movement can be shortened without using the heat pipe 6. In this embodiment, a heat-conducting shell 7 is provided at the edge of the heat-conducting plate 5. The heat-conducting shell 7 is disc-shaped, and an edge seal extending away from the heat-conducting plate 5 is provided on the outer edge of the heat-conducting shell 7. The edge seal is a ring with a gradually increasing opening, that is, the diameter of the connection with the heat-conducting shell 7 is smaller than the diameter of the end away from the heat-conducting shell 7, so that the heat-conducting shell 7 can guide the wind direction, such as Fig.10 As shown, air will flow from the heat-conducting shell 7 to the edge seal, and move from the edge seal in a direction away from the laser 2, thereby taking away heat. The fin group 4 and the fan 3 are both arranged in the heat-conducting shell 7, dividing the heat-conducting shell 7 into two halves. The fin group 4 and the fan 3 are respectively located in two semicircles of the heat-conducting shell 7. The fan 3 and the fin group 4 divide the heat-conducting plate 5 into two parts. Fig.10As shown, one part is connected to the fin group 4 so that the heat of the heat conducting plate 5 can be directly transferred to the fin group 4 without passing through the heat pipe 6, and the other part is opposite to the air inlet or outlet of the fan 3, so the fan 3 is tilted in the heat conducting shell 7, and the rotation center axis of the fan 3 is not parallel to the center axis of the heat conducting plate 5. Because the fan 3 is tilted, the fin group 4 also adopts an inclined structure to achieve a symmetrical design with the fan 3.

[0035] When the air inlet of the fan 3 faces the heat transfer plate 5, the air flows from the fin group 4 through the heat transfer plate 5 to the air inlet of the fan 3; When the air outlet of the fan 3 faces the heat conducting plate 5 , air flows from the air outlet of the fan 3 through the heat conducting plate 5 to reach the fin assembly 4 .

[0036] In order to realize the dual air path design, a plurality of through holes 71 are provided on the side wall of the heat-conducting shell 7. The through holes 71 are located on the side of the heat-conducting shell 7 away from the fin group 4, and the fan 3 can be connected to the inside of the bracket 1 on which the laser 2 is installed through the through holes 71 to increase the internal air flow.

[0037] For example, the air outlet of the fan 3 faces the heat conducting plate 5. The heat conducting plate 5 is closely attached to the laser 2, and the heat is transferred from the laser 2 to the heat conducting plate 5, and then transferred to the fin group 4 via the heat conducting plate 5. After the fan 3 is started, the air can be blown directly to the heat conducting plate 5 from the air outlet, thereby directly cooling the heat conducting plate 5. At the same time, (part of the air that has not blown through the heat conducting plate 5) will also be blown into the bracket 1 through the through hole 71, increasing the air flow in the bracket 1 and cooling the laser 2 as a whole. The air blown toward the heat transfer plate 5 will pass through the fins of the fin group 4 again to take away the heat. At a position close to the fan 3, because the wind speed is relatively high, the inclined design of the fin group 4 can increase the distance the air flows through the fins, thereby improving the heat dissipation efficiency. At a position far away from the fan 3 and close to the edge seal, the inclined design of the fin group 4 can reduce the distance the air flows through the fins, thereby avoiding the air being heated into hot air and affecting the heat dissipation efficiency. The flange design of the edge seal can effectively guide the hot air away from the laser 2, thereby avoiding the hot air from affecting the heat dissipation.

[0038] In the description of the present invention, it is to be understood that the terms “center”, “longitudinal”, “lateral”, “length”, “width”, “thickness”, “up”, “down”, “front”, “back”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inside”, “outside”, “clockwise”, “counterclockwise”, “axial”, “radial”, “circumferential”, etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are only for the convenience of describing 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 limiting the present invention.

[0039] In 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, a detachable connection, or an integral one; it can be a mechanical connection, an electrical connection, or communication with each other; 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, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0040] Although the embodiments of the present invention have been disclosed as above, they are not limited to the applications listed in the specification and the implementation methods. They can be fully applied to various fields suitable for the present invention. For those familiar with the art, additional modifications can be easily implemented. Therefore, without departing from the general concept defined by the claims and the scope of equivalents, the present invention is not limited to the specific details and the illustrations shown and described herein.

Claims

1. A laser heat dissipation module, characterized in that: include: A laser (2) arranged on a bracket (1), and a heat dissipation component detachably connected to the laser (2); the heat dissipation component comprises a fan (3), a heat conduction module, and a fin group (4) composed of a plurality of fins, the fin group (4) being arranged on the heat conduction module, the fan (3) being arranged on a side of the fin group (4) away from the heat conduction module, and the heat conduction module and the fan (3) being both normal to the fins.

2. The laser heat dissipation module according to claim 1, characterized in that: The heat conduction module comprises a heat conduction plate (5), the fin group (4) is arranged on the heat conduction plate (5), and the fin group (4) is connected to the laser (2) via the heat conduction plate (5).

3. The laser heat dissipation module according to claim 2, characterized in that: The heat conduction module further comprises a heat pipe (6); a side of the heat conduction plate (5) away from the laser (2) is provided with a plurality of first grooves (51); a side of the fin group (4) connected to the heat conduction plate (5) is provided with a plurality of second grooves (41); the number and shape of the second grooves (41) are adapted to the first grooves (51); when the fin group (4) is connected to the heat conduction plate (5), the first grooves (51) and the second grooves (41) form a first assembly hole, and the heat pipe (6) passes through the first assembly hole.

4. The laser heat dissipation module according to claim 3, characterized in that: The fin group (4) is also provided with a plurality of second assembly holes (42), the number of the second assembly holes (42) being adapted to the number of the first assembly holes, and the heat pipe (6) passes through the first assembly holes and the second assembly holes (42).

5. The laser heat dissipation module according to claim 4, characterized in that: The fin group (4) is a cube formed by a plurality of rectangular fins, one side of the fin is connected to the heat conducting plate (5), two adjacent fins form three air outlets, namely a first air outlet, a second air outlet and a third air outlet, and a fan (3) is provided on the side of the fin opposite to the heat conducting plate (5).

6. The laser heat dissipation module according to claim 2, characterized in that: The heat conduction module further comprises a heat pipe (6), and the fin group (4) is provided with at least one third assembly hole (43).

7. The laser heat dissipation module according to claim 6, characterized in that: An open groove (52) communicating with the third assembly hole (43) is provided on the heat conduction plate (5), and the heat pipe (6) is arranged in the third assembly hole (43).

8. The laser heat dissipation module according to claim 7, characterized in that: The heat pipe (6) is perpendicular to the fins.

9. The laser heat dissipation module according to claim 5, characterized in that: The air outlet provided with the fan (3) is a first air outlet, and the second air outlet and the third air outlet are respectively located on two opposite sides, a first air path is formed between the first air outlet and the second air outlet, and a second air path is formed between the first air outlet and the third air outlet.

10. A heat dissipation method for a laser heat dissipation module according to any one of claims 1 to 9, characterized in that: The two end surfaces of the laser (2) are respectively a light emitting surface and a heat generating surface. The heat generating surface of the laser (2) is mounted on a heat conducting module. The heat of the laser (2) is transferred to the fin assembly (4) via the heat conducting module and is dissipated via the fan (3).

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