Laser heat dissipation structure and fiber laser
By incorporating a novel layout and porous design of fin groups and air-blowing components in the laser, the problems of uneven temperature and low heat dissipation efficiency in air-cooled lasers are solved, achieving more efficient and uniform heat dissipation and reducing costs.
Patent Information
- Application Number
- CN202423003828.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-05
- Publication Date
- 2025-10-24
- Estimated Expiration
- 2034-12-05
AI Technical Summary
Existing air-cooled lasers suffer from uneven temperature distribution, which makes components near the air outlet susceptible to high temperatures and results in low heat dissipation efficiency.
The first fin group is set on the upper side of the first substrate, and the second fin group is set on the lower side of the second substrate. The air blowing components are located above and below the middle of the fin group, respectively. The fins are arranged alternately and adopt a multi-hole design, combined with a heat spreader structure to improve heat dissipation efficiency.
This improved the uniformity of temperature inside the laser, shortened the distance the cold air travels, enhanced heat dissipation efficiency, reduced noise generation, and lowered production and operating costs.
Smart Images
Figure CN223471906U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model belongs to the technical field of laser heat dissipation, especially relates to a laser heat dissipation structure and fiber laser. BACKGROUND
[0002] In some industrial applications, the laser is required to have good portability, so that the laser is miniaturized and lightened while the power of the laser is improved. Compared with the water-cooled laser, the air-cooled laser does not need to be provided with a water cooler, thereby reducing the overall volume and weight of the laser. The thermal conductivity coefficient of air is only 1 / 20 of the thermal conductivity coefficient of water, and the heat conduction performance is poor, so the heat exchange performance needs to be improved by increasing the heat dissipation surface area, and the specific heat capacity and density of air are low, so the convection heat exchange is needed to prevent heat accumulation.
[0003] At present, the mainstream air-cooled laser is designed to clamp the fins between two substrates, the pump source and the optical fiber of the laser are arranged on the outer side of the substrate, the air inlet and the air outlet are arranged along the long axis direction of the fins, and the fan is installed at the air inlet and / or the air outlet to increase the air flow rate, so as to improve the heat dissipation performance. However, in the air-cooled laser with such a structure, the temperature of the fins at the air inlet is close to the temperature of the ambient air, the temperature of the fins at the air outlet is higher than the temperature of the ambient air, the temperature difference between the fins at the air inlet and the air is large, the heat on the fins at the air inlet can be more quickly conducted to the air and carried away by the fan, the temperature of the fins at the air outlet and the air is higher, the heat transfer efficiency from the substrate to the fins and then from the fins to the air is reduced, the temperature in the laser is not balanced, the temperature in the laser is higher closer to the air outlet, and the components near the air outlet are easily affected by high temperature. UTILITY MODEL CONTENTS
[0004] In view of the above problems, the utility model discloses a laser heat dissipation structure and fiber laser to overcome the above problems or at least partially solve the above problems.
[0005] In order to achieve the above purpose, the utility model adopts the following technical scheme:
[0006] The utility model discloses a laser heat dissipation structure in one aspect, including first base plate, second base plate, first fin group, second fin group, first blowing assembly and second blowing assembly;
[0007] The first substrate is arranged in parallel above the second substrate, the lower side of the first substrate is used for arranging a pump source of the laser, the first fin group is fixedly arranged on the upper side of the first substrate, the short axis direction of the fins in the first fin group is perpendicular to the first substrate, and the first blowing assembly is located above the middle of the first fin group.
[0008] Further, the fins in the first fin group and the fins in the second fin group are arranged in parallel and at intervals.
[0009] Further, the first blowing assembly and the first fin group have a consistent width in the thickness direction of the fins in the first fin group, and the second blowing assembly and the second fin group have a consistent width in the thickness direction of the fins in the second fin group.
[0010] Further, the fins in the first fin group and the second fin group are arranged in a radial manner.
[0011] Further, the first fin group and the second fin group each include long fins and short fins, the long fins and the short fins are arranged alternately and at intervals, and the tail ends of the long fins and the short fins are aligned.
[0012] Further, the fins in the first fin group and the second fin group are porous fins.
[0013] Further, the first substrate and the second substrate are both heat plates.
[0014] Further, the first blowing assembly and the second blowing assembly are both fans.
[0015] The utility model discloses another aspect a kind of fiber laser, including pump source, optical fiber and above-mentioned the heat dissipation structure of laser;
[0016] The pump source is arranged on the lower side of the first substrate, and the optical fiber is arranged on the upper side of the second substrate.
[0017] Further, the number of pump sources is multiple, and multiple pump sources are arranged in array form on the first substrate.
[0018] The utility model has the advantages and beneficial effects that:
[0019] The laser radiator structure has the advantages that the first fin group is arranged on the upper side of the first base plate, and the second fin group is arranged on the lower side of the second base plate, so that the fins are completely exposed to the ambient air, the temperature at the edges of all the fins on the base plate is approximately the ambient temperature, the heat dissipation efficiency of the fins is close to uniform, the temperature difference inside the laser is reduced, and the problem of uneven temperature in the laser in the prior art is overcome. BRIEF DESCRIPTION OF DRAWINGS
[0020] Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The accompanying drawings are included to provide a description of the preferred embodiments and are not intended to limit the scope of the present application. Furthermore, the drawings are not necessarily drawn to scale. In the drawings:
[0021] Figure 1 is a front view of the laser radiator structure in an embodiment of the present application;
[0022] Figure 2 is a left view of the laser radiator structure in an embodiment of the present application;
[0023] Figure 3 is a top view of the laser radiator structure in an embodiment of the present application;
[0024] Figure 4 is a structure diagram of the fins in the first fin group and the second fin group in another embodiment of the present application.
[0025] In the drawings: 1, first base plate; 2, second base plate; 3, first fin group; 4, second fin group; 5, first blowing assembly; 6, second blowing assembly; 7, long fin; 8, short fin. DETAILED DESCRIPTION
[0026] In order to make the purpose, technical scheme and advantages of the present application clearer, the technical scheme of the present application will be described clearly and completely below in combination with the specific embodiments of the present application and the corresponding drawings. Obviously, the described embodiments are only some of the embodiments of the present application, but not all the embodiments. Based on the embodiments in the present application, all the other embodiments obtained by those of ordinary skill in the art without creative labor fall within the scope of protection of the present application.
[0027] The technical solutions of the embodiments provided by the utility model are described in detail below with reference to the drawings.
[0028] An embodiment of the utility model provides a kind of laser heat dissipation structure, as shown in Figures 1 to 3 The laser heat dissipation structure includes first substrate 1, second substrate 2, first fin group 3, second fin group 4, first blowing assembly 5 and second blowing assembly 6. Wherein, first blowing assembly and second blowing assembly are both fan, and first fin group and second fin group are both composed of multiple fins.
[0029] Specifically, first substrate 1 is arranged in parallel above second substrate 2, and first substrate 1 and second substrate 2 are spaced apart by a distance, the lower side of first substrate 1 is used to set the pump source of laser, first fin group 3 is fixedly arranged on the upper side of first substrate 1, and the short axis direction of fin in first fin group 3 is perpendicular to first substrate 1, that is, the short axis of fin stands on first substrate 1, since the heat generated by the pump source of laser accounts for a larger proportion, the area of first substrate 1 and first fin group 3 can be adjusted appropriately as needed, first blowing assembly 5 is located above the middle of first fin group 3, first blowing assembly 5 can blow cold air into each fin in first fin group 3, and blow to at least two ends of first fin group 3, to realize the cooling of fin; the upper side of second substrate 2 is used to set the optical fiber of laser, second fin group 4 is fixedly arranged on the lower side of second substrate 2, and the short axis direction of fin in second fin group 4 is perpendicular to second substrate 2, that is, the short axis of fin stands on second substrate 2, second blowing assembly 6 is located below the middle of second fin group 4, second blowing assembly 6 can blow cold air into each fin in second fin group 4, and blow to at least two ends of second fin group 4, to realize the cooling of fin. Wherein, the thickness, quantity and surface area of fin in first fin group and second fin group can be set as needed.
[0030] In summary, in the laser heat dissipation structure of the embodiment, by arranging first fin group on the upper side of first substrate and arranging second fin group on the lower side of second substrate, the fins are completely exposed to the ambient air, so that the temperature at the edge of all fins on the substrate is approximately the ambient temperature, which can ensure that the heat dissipation efficiency of fins is approximately uniform, thereby reducing the temperature difference inside the laser, and overcoming the problem of uneven temperature in the existing design; and by arranging first blowing assembly above the middle of first fin group and arranging second blowing assembly below the middle of second fin group, the distance of cold air flowing between fins is shortened, the heat that needs to be taken away by unit volume of air is reduced, and the heat dissipation efficiency of the laser heat dissipation structure is improved.
[0031] In the embodiment, as shown in Figure 1 And Figure 3As shown, the fins in the first fin group 3 and the fins in the second fin group 4 are parallel and spaced apart. This arrangement of the first fin group 3 and the second fin group 4 is simple and convenient to manufacture, effectively reducing the production cost of the laser heat dissipation structure.
[0032] In addition, the first blowing assembly 5 and the first fin group 3 have the same width in the thickness direction of the fins in the first fin group 3, ensuring that the cold air blown by the first blowing assembly 5 can reach between the fins in the first fin group 3, thereby ensuring the consistency of heat dissipation of the first fin group 3; the second blowing assembly 6 and the second fin group 4 have the same width in the thickness direction of the fins in the second fin group 4, thereby ensuring that the cold air blown by the second blowing assembly 6 can reach between the fins in the second fin group 4, thereby ensuring the consistency of heat dissipation of the second fin group 4.
[0033] In other embodiments, Figure 4 As shown, the fins in both the first and second fin groups are arranged radially. This allows the use of smaller first and second blowing assemblies to blow cool air between the fins in the first and second fin groups, ensuring consistent heat dissipation between the first and second fin groups, thereby reducing the material cost of the laser heat dissipation structure.
[0034] Moreover, both the first fin group and the second fin group include long fins 7 and short fins 8, and the long fins 7 and the short fins 8 are arranged alternately and at intervals, and the tail ends of the long fins 7 and the short fins 8 are aligned. On the premise of maintaining a certain distance between the fins in the first fin group and the second fin group, the number of fins arranged is increased, thereby improving the heat dissipation efficiency of the first fin group and the second fin group.
[0035] In this embodiment, the fins in the first fin group and the second fin group are porous fins. The porous fins can not only improve the heat transfer efficiency, but also reduce the noise generated because the air flow is disturbed by the small holes during the flow process.
[0036] Furthermore, the first substrate and the second substrate are both heat sinks.
[0037] It should be noted that the heat spreader is a vacuum cavity with a microstructure on the inner wall, usually made of copper. When heat is transferred from the heat source to the evaporation zone of the heat spreader, the coolant in the heat spreader cavity begins to vaporize after being heated in a low vacuum environment. At this time, it absorbs heat energy and expands rapidly in volume. The gaseous cooling medium quickly fills the entire cavity. When the gaseous cooling medium contacts a relatively cold area, condensation will occur, and the heat accumulated during evaporation will be released through condensation. The condensed coolant will return to the evaporation heat source through the microstructured capillary channels, and this operation will be repeated in the cavity.
[0038] With the first substrate as an example, heat generated by the pump source of the laser is conducted to the lower side of the first substrate, so that the liquid-phase cooling medium in the lower side of the first substrate is heated to evaporate and form a gas-phase cooling medium, in the process, a large amount of heat is absorbed, so that the pump source of the laser can be cooled, and the gas-phase cooling medium diffuses in the first substrate, and due to the low temperature of the first fin group, the gas-phase cooling medium condenses into a liquid-phase cooling medium at the upper side of the first substrate and releases a large amount of heat, the released heat is conducted to the first fin group and is transferred to the outside of the laser through air cooling, and the condensed liquid-phase cooling medium returns to the lower side of the first substrate to evaporate again; in the whole heat dissipation process, no energy is consumed, and the use cost of the laser is reduced.
[0039] In another embodiment of the present application, a fiber laser is provided, which comprises a pump source, an optical fiber and the laser heat dissipation structure in the above embodiments.
[0040] Specifically, the pump source is arranged on the lower side of the first substrate, and the optical fiber is arranged on the upper side of the second substrate, so that the fiber laser has the advantages of high heat dissipation efficiency and good heat dissipation uniformity.
[0041] In addition, the number of pump sources is multiple, and the multiple pump sources are arranged in an array on the first substrate, so that the fiber laser has higher output power under the premise of meeting the heat dissipation requirement.
[0042] The above is only a specific embodiment of the present application, and based on the above teaching of the present application, those skilled in the art can make other improvements or modifications on the basis of the above embodiment. Those skilled in the art should understand that the above specific description is only for better explanation of the purpose of the present application, and the protection scope of the present application should be subject to the protection scope of the claims.
Claims
1. A laser heat sink structure, comprising: The laser heat dissipation structure comprises a first substrate, a second substrate, a first fin group, a second fin group, a first air blowing assembly and a second air blowing assembly. The first substrate is arranged in parallel above the second substrate, the lower side of the first substrate is used for arranging a pump source of a laser, the first fin group is fixedly arranged on the upper side of the first substrate, the short axis direction of the fins in the first fin group is perpendicular to the first substrate, and the first air blowing assembly is located above the middle of the first fin group; the upper side of the second substrate is used for arranging an optical fiber of a laser, the second fin group is fixedly arranged on the lower side of the second substrate, the short axis direction of the fins in the second fin group is perpendicular to the second substrate, and the second air blowing assembly is located below the middle of the second fin group.
2. The laser heat dissipation structure of claim 1, wherein, The fins in the first fin group and the fins in the second fin group are arranged in parallel and spaced apart.
3. The laser heat dissipation structure of claim 2, wherein, The first air blowing assembly and the first fin group have a consistent width in the thickness direction of the fins in the first fin group; and the second air blowing assembly and the second fin group have a consistent width in the thickness direction of the fins in the second fin group.
4. The laser heat dissipation structure of claim 1, wherein, The fins in the first fin group and the fins in the second fin group are arranged in a radial manner.
5. The laser heat dissipation structure of claim 4, wherein, The first fin group and the second fin group each comprise long fins and short fins, the long fins and the short fins are arranged alternately and spaced apart, and the tail ends of the long fins and the short fins are aligned.
6. The laser heat spreading structure of claim 1, wherein, The fins in the first fin group and the fins in the second fin group are porous fins.
7. The laser heat dissipation structure of claim 1, wherein, The first substrate and the second substrate are both heat plates.
8. The laser heat dissipation structure according to any one of claims 1 to 7, characterized by, The first air blowing assembly and the second air blowing assembly are both fans.
9. A fiber laser, characterized by, The laser heat dissipation structure comprises a pump source, an optical fiber and the laser heat dissipation structure according to any one of claims 1-8. The pump source is arranged on the lower side of the first substrate, and the optical fiber is arranged on the upper side of the second substrate.
10. The fiber laser of claim 9, wherein, The number of the pump sources is multiple, and the multiple pump sources are arranged in an array on the first substrate. The number of the pump sources is multiple, and the multiple pump sources are arranged in an array on the first substrate.