An efficient cooling device within a laser light source
By employing a cooling substrate design within the laser source and utilizing a diamond-shaped mesh structure formed by a flat plate and diamond-shaped flow dividers, the problem of efficient cooling of the laser source is solved, achieving more efficient heat dissipation and a more uniform temperature distribution, thereby improving the stability and lifespan of the light source.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SHANXI OVISION OPTRONICS CO LTD
- Filing Date
- 2025-08-04
- Publication Date
- 2026-07-21
AI Technical Summary
The discrete high heat flux density distribution of laser sources leads to the inability to efficiently remove local heat in a timely manner. Existing cooling devices suffer from problems such as uneven flow field distribution, significant temperature differences on the cooling surface, and low energy efficiency.
The cooling substrate design includes flat-plate flow dividers and diamond-shaped flow dividers, forming a diamond-shaped mesh structure. The cooling medium passes through the inlet rectifier zone, the diamond-shaped mesh zone, and the outlet convergence zone, achieving uniform fluid distribution and efficient heat exchange.
It significantly improves heat exchange efficiency, reduces the formation of local high-temperature zones, enhances the stability and lifespan of the light source, and improves the cost-effectiveness of the cooling device.
Smart Images
Figure CN224537601U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of cooling device technology, and particularly to an optical cooling auxiliary device, specifically a high-efficiency cooling device for a laser source. Background Technology
[0002] Laser light sources, such as semiconductor-pumped solid-state lasers and fiber lasers, release a significant amount of heat during operation due to their core optical components and electronic control devices. Unlike other heat-generating devices, the heat sources in laser light sources are not uniformly distributed but exhibit a lattice-like distribution, i.e., a discrete high heat flux density distribution. This is characterized by a large number of independent, spatially discrete individual emitting nodes or key optical nodes, and high heating intensity at these points. If this locally concentrated heat cannot be cooled and dissipated efficiently and promptly, it will directly affect the output stability, beam quality, and lifespan of the light source.
[0003] Current mainstream cooling solutions employ the same cooling methods as other heat-generating components, primarily using comb-shaped, disc-shaped, or perforated water-cooled plates. These solutions generally enhance heat transfer through dense flow channels. However, in this field, they suffer from uneven flow field distribution and significant temperature differences on the cooling surface. This easily leads to localized high-temperature zones, causing excessively high temperatures at some points of the light source, resulting in high-temperature damage. Conversely, low-temperature areas do not require heat dissipation, yet the coolant still dissipates heat to these areas, causing even greater temperature differences. Alternatively, long fluid paths and high flow resistance necessitate high-power pumps, resulting in low energy efficiency. Therefore, cooling devices adapted to optical components and their control devices have always been a crucial optical component that the industry continuously strives to improve. More efficient and cost-effective cooling devices determine the user experience and technical level of a light source product.
[0004] Therefore, there is an urgent need to develop a new cooling device to solve the cooling problem of discrete high-heat components, while minimizing the waste of cold source power. Utility Model Content
[0005] To address the problem that current laser light sources exhibit discrete high heat flux density distributions, resulting in localized concentrated heat that cannot be efficiently dissipated during cooling, necessitating a more efficient and cost-effective cooling device, this invention provides a high-efficiency cooling device for laser light sources.
[0006] This utility model is achieved using the following technical solution: A high-efficiency cooling device for a laser source includes a cooling substrate, which is in close contact with the TO tube socket of the laser source. The cooling substrate has a medium inlet and a medium outlet at both ends along its length. At least three parallel flat-plate diverter columns are provided at the end of the cooling substrate near the medium inlet. The cooling substrate also has rhomboid diverter columns that divide the internal space into rhomboid channels. The rhomboid diverter columns are arranged in a staggered pattern with equal gaps. The acute apex of each rhomboid diverter column faces the side of the cooling substrate where the medium inlet is located. The water flow intersection of the rhomboid channels corresponds to the installation position of the TO tube socket of the laser source on the water-cooled substrate.
[0007] In implementation, the cooling substrate is made of any material among stainless steel, pure copper, and oxygen-free copper. The bottom of the cooling substrate is set close to the bottom of the TO tube seat of the laser light source. The two ends of the cooling substrate along the length direction are provided with a medium inlet and a medium outlet. The medium inlet and the medium outlet are symmetrically arranged and have the same aperture, which effectively reduces flow resistance and improves system stability. The cooling substrate is sequentially connected with an inlet rectifying zone, a diamond-shaped mesh zone, and an outlet converging zone along the flow direction of the cooling medium. At least three parallel flat-plate diverter columns are located near the medium inlet within the cooling substrate. The flow-facing surface of each flat-plate diverter column is a streamlined curved surface to reduce flow resistance and eddy current generation. Specifically, the inlet rectifying zone contains flat-plate diverter columns, including a right diverter column, a middle diverter column, and a left diverter column. The middle diverter column faces the medium inlet, meaning its centerline coincides with the central axis of the medium inlet. The distance between the left diverter column and the middle diverter column is equal to the distance between the right diverter column and the middle diverter column, used to divide the incident fluid into four branches. Diamond-shaped diverter columns are located on both sides of the left and right diverter columns.
[0008] The cooling substrate contains rhomboid diversion columns that divide the internal space into rhomboid channels. The rhomboid diversion columns are arranged in staggered rows with equal gaps. The inner surface of the cooling substrate in the rhomboid channel area is a stepped guide wall, which suppresses the thickening of the flow boundary layer and the generation of turbulence, and maintains efficient and uniform heat exchange. Specifically, the rhomboid channel area contains continuously staggered rhomboid diversion columns. The number of rhomboid diversion columns in two adjacent rows differs by one, that is, the rhomboid diversion columns are arranged alternately according to the number of N / N+1 columns. The steps of the stepped guide wall correspond to the positions of the rhomboid diversion columns. The acute apex of each rhomboid diversion column faces the side of the cooling substrate where the medium inlet is located, which effectively reduces the medium flow resistance.
[0009] The TO tube socket used for the laser source is circular, and the heat distribution can be considered as an outwardly diffusing circular heat source. The water flow intersections of the diamond-shaped channel correspond to the installation positions of the TO tube sockets of the laser source on the water-cooled substrate. Specifically, the TO tube sockets of the laser source are installed on the surface of the cooling substrate corresponding to the diamond-shaped channel area. The installation position of the TO tube socket located in the center corresponds to the water flow intersection formed by the diamond-shaped diverting columns within the diamond-shaped channel area, and the installation position of the TO tube socket located at the edge corresponds to the water flow inflection point formed by the stepped guide wall and the diamond-shaped diverting columns located at the edge. The water flow intersection has the smallest cross-sectional area and the fastest flow velocity. According to the heat convection formula, increasing the fluid velocity increases the heat convection exchange coefficient of the fluid, helping the heat source to remove more heat. The installation location of the TO tube socket creates a corresponding area between the high-heat zone of the heat source and the high-heat-transfer zone of the water cooling system. This effectively reduces the temperature in the center of the tube socket, ensuring that the bottom of each TO tube socket corresponds to a region with high cooling medium flow efficiency. This significantly increases fluid turbulence and heat transfer efficiency, substantially improving the heat transfer performance for discrete high-heat-flux-density heat sources and effectively preventing the formation of localized high-temperature zones. Furthermore, the diamond-shaped mesh arrangement provides a large cooling surface area, effectively removing a significant amount of heat from the optical and electronic equipment mounted on it, preventing overheating that could affect stability and lifespan.
[0010] The outlet convergence area includes a trapezoidal channel, within which several rows of diamond-shaped diverter columns are evenly arranged. The number of diamond-shaped diverter columns in each row is one less than the number of diamond-shaped diverter columns in the left row, and the row of diamond-shaped diverter columns closest to the medium outlet contains an odd number of diamond-shaped diverter columns.
[0011] In operation, when the cooling medium, i.e., cooling liquid or gas, enters the cooling substrate through the medium inlet, it first enters the inlet rectification zone. The medium flow impacts the flat-plate diverter columns. Under the combined action of the right, middle, and left diverter columns, the incident fluid is divided into four streams, which quickly flow into the diamond-shaped channel area. Within the diamond-shaped channel area, the medium flows through the diamond-shaped channels formed by continuously staggered diamond diverter columns. Each channel outlet has a diamond diverter column that evenly separates the cooling medium, ensuring thorough homogenization of the cooling medium within the cooling device. The diamond-shaped channels divide, merge, and redirect the medium, greatly increasing fluid turbulence and heat exchange area, significantly improving heat exchange efficiency. The diamond-shaped channel area has a large cooling surface area, which can remove a significant amount of heat from the optical and electronic equipment installed on it, preventing overheating that could affect stability and lifespan. After efficient heat exchange, the cooling medium enters the outlet convergence zone, where a series of decreasing-number diamond-shaped diverter columns smoothly converge the dispersed multiple streams of fluid. The converged fluid then flows out of the cooling platen through the medium outlet and returns to the heat dissipation section of the circulation system for further cooling. Compared with the prior art, the present invention has the following advantages: The high-efficiency cooling device in a laser source provided by the present invention divides the cooling medium into four streams through a flat-plate diverter column, and then further divides the flow through a diamond-shaped diverter column to achieve uniform fluid flow throughout the entire area; and has a longer flow channel side length under the same projected area, which maximizes the contact area between the cooling medium and the heat source and directly improves the heat exchange efficiency.
[0012] According to experimental calculations, under the same heat source and with other cooling devices of the same surface area, this application improves efficiency by 15%-20% compared to the comb-type cooling device and by 7%-10% compared to the ordinary rectangular grid. Specifically, under the same heat source, the temperature of this device is 4℃-6℃ lower than that of the comb-type cooling device and 2℃-3℃ lower than that of the rectangular grid. Moreover, the temperature difference at different positions on the cooling surface is significantly better than that of the comb-type structure and better than that of the mesh structure.
[0013] This application can effectively improve the integration density of light-emitting chips inside the laser source, increasing the integration density by 1 / 8 compared to the traditional rectangular grid arrangement; at the same time, it can significantly improve the heat dissipation area utilization rate. That is, in the traditional rectangular arrangement, there is a relatively low temperature zone in the middle of the four light-emitting chips, and the fluid carries away less heat in this area. However, under the condition that other conditions are fixed and the medium is water, the diamond grid heat dissipation of this application carries away 1 / 11.2 more heat than the rectangular grid heat dissipation.
[0014] This application is made of any of the following materials: stainless steel, pure copper, or oxygen-free copper. It is suitable for industrial corrosive environments or high thermal conductivity scenarios. The medium inlet and medium outlet are symmetrically designed to effectively reduce flow resistance and improve system stability. Attached Figure Description
[0015] Figure 1 This is a perspective view of the present invention.
[0016] Figure 2 This is a top view of the structure of the present invention.
[0017] In the diagram: 1. Medium inlet; 2. Right split column; 3. Middle split column; 4. Left split column; 5. Diamond split column; 6. Medium outlet; 7. Cooling base plate; 8. Inlet rectifier area; 9. Diamond mesh channel area; 10. Outlet convergence area. Detailed Implementation
[0018] The specific embodiments of this utility model will now be described with reference to the accompanying drawings.
[0019] A high-efficiency cooling device for a laser source, such as Figure 1 , 2As shown: It includes a cooling substrate 7, which is made of any of the following materials: stainless steel, pure copper, or oxygen-free copper. During processing, flow channels are first machined on the metal material, and then a thin plate of the same material is brazed to cover it to form the cooling substrate 7. The cooling substrate 7 is set close to the bottom of the TO tube seat of the laser light source. The cooling substrate 7 has a medium inlet 1 and a medium outlet 6 at both ends along the length direction. The medium inlet 1 and the medium outlet 6 are symmetrically arranged and have the same aperture, which effectively reduces flow resistance and improves system stability. The cooling substrate 7 is sequentially connected with an inlet rectifying zone 8, a diamond-shaped mesh channel zone 9, and an outlet converging zone 10 along the flow direction of the cooling medium. At least three parallel flat-plate diverting columns are provided at one end of the cooling substrate 7 near the medium inlet 1. The flow-facing surface of the flat-plate diverting columns is a streamlined curved surface to reduce flow resistance and eddy current generation. Specifically, the inlet rectifying zone 8 contains flat-plate diverting columns, including a right diverting column 2, a middle diverting column 3, and a left diverting column 4. The middle diverting column 3 faces the medium inlet 1, meaning its centerline coincides with the central axis of the medium inlet 1. The distance between the left diverting column 4 and the middle diverting column 3 is equal to the distance between the right diverting column 2 and the middle diverting column 3, used to divide the incident fluid into four branches. Diamond-shaped diverting columns 5 are provided on both sides of the left diverting column 4 and the right diverting column 2. The cooling substrate 7 contains rhomboid diversion columns 5 that divide the internal space into rhomboid channels. These rhomboid diversion columns 5 are arranged in a staggered, equally spaced pattern. The inner surface of the cooling substrate 7 in the rhomboid channel region 9 is a stepped guide wall, which suppresses the thickening of the flow boundary layer and the generation of turbulence, maintaining efficient and uniform heat exchange. Specifically, the rhomboid channel region 9 contains continuously staggered rhomboid diversion columns 5, with the number of columns in adjacent rows differing by one. That is, the rhomboid diversion columns 5 are arranged alternately according to a ratio of N / N+1 per column. The steps of the stepped guide wall correspond to the positions of the rhomboid diversion columns 5. The acute apex of each rhomboid diversion column 5 faces the side of the cooling substrate 7 where the medium inlet 1 is located, effectively reducing the medium flow resistance. The water flow intersections of the rhomboid channels correspond to the mounting positions of the TO tube sockets of the laser light source on the water-cooled substrate 7. The TO tube sockets of the laser light source are mounted on the surface of the cooling substrate 7 corresponding to the rhomboid channel region 9. The central TO tube... The installation position of the pipe seat corresponds to the water flow intersection point formed by the diamond-shaped diversion column 5 within the diamond-shaped channel area 9; the installation position of the TO pipe seat at the edge corresponds to the water flow inflection point formed by the stepped guide wall and the diamond-shaped diversion column 5 located at the edge.
[0020] The outlet convergence area 10 includes a trapezoidal channel, in which several rows of rhomboid diverter columns 5 are evenly arranged. The number of rhomboid diverter columns 5 in each row is one less than the number of rhomboid diverter columns 5 in the left row, and the row of rhomboid diverter columns 5 closest to the medium outlet 6 contains an odd number of rhomboid diverter columns 5.
[0021] In use, when the cooling medium, i.e., cooling liquid or gas, enters the cooling substrate 7 through the medium inlet 1, it first enters the inlet rectifying zone 8. The medium flow impacts the flat-plate diverting columns. Under the combined action of the right diverting column 2, the middle diverting column 3, and the left diverting column 4, the incident fluid is divided into four branches and quickly flows into the diamond-shaped channel zone 9. Within the diamond-shaped channel zone 9, the medium flows in the diamond-shaped channels formed by continuously staggered diamond diverting columns 5. Each channel outlet has a diamond diverting column 5 that evenly separates the cooling medium, ensuring that the cooling medium inside the cooling device is fully homogenized. The diamond-shaped channels divide, merge, and redirect the medium, greatly increasing fluid turbulence and heat exchange area, significantly improving heat exchange efficiency. The diamond-shaped channel zone 9 has a large cooling surface area, which can remove a significant amount of the working heat of the optical and electronic equipment installed on it, preventing overheating from affecting stability and lifespan. After completing efficient heat exchange, the cooling medium enters the outlet convergence zone 10. The diamond-shaped diverting columns 5, which decrease in number in sequence, smoothly converge the dispersed multiple streams of fluid. The converged fluid flows out of the cooling base plate 7 through the medium outlet 6 and returns to the heat dissipation part of the circulation system for cooling.
[0022] Throughout the process, the heat generated by the high-temperature laser source is transferred from the heat source to the wall of the cooling substrate 7 through heat conduction, maximizing the contact area between the cooling medium and the heat source, and directly improving the heat exchange efficiency.
[0023] The scope of protection claimed by this utility model is not limited to the specific embodiments described above. Moreover, for those skilled in the art, this utility model can have various modifications and alterations. Any modifications, improvements, and equivalent substitutions made within the concept and principles of this utility model should be included within the protection scope of this utility model.
Claims
1. A high-efficiency cooling device for a laser source, characterized in that: It includes a cooling substrate (7), which is disposed close to the bottom of the TO tube seat of the laser light source. The cooling substrate (7) has a medium inlet (1) and a medium outlet (6) at both ends along the length direction. The cooling substrate (7) has at least three parallel flat-plate diversion columns at one end near the medium inlet (1). The cooling substrate (7) has diamond-shaped diversion columns (5) that divide the internal space into diamond-shaped channels. The diamond-shaped diversion columns (5) are arranged in staggered rows with equal gaps. The acute angle vertex of each diamond-shaped diversion column (5) faces the side of the cooling substrate (7) where the medium inlet (1) is located. The water flow intersection of the diamond-shaped channels corresponds to the installation position of the TO tube seat of the laser light source on the cooling substrate (7).
2. The high-efficiency cooling device for a laser source according to claim 1, characterized in that: The cooling substrate (7) is provided with an inlet rectifier zone (8), a diamond mesh channel zone (9), and an outlet convergence zone (10) connected sequentially along the cooling medium flow direction. The diamond mesh channel zone (9) is provided with continuously staggered diamond diverter columns (5), and the number of diamond diverter columns (5) in two adjacent columns differs by one. The inner surface of the cooling substrate (7) in the diamond mesh channel zone (9) is a stepped guide wall, and the steps of the stepped guide wall correspond to the positions of the diamond diverter columns (5).
3. The high-efficiency cooling device for a laser source according to claim 2, characterized in that: The TO tube socket of the laser light source is installed on the surface of the cooling substrate (7) corresponding to the diamond mesh channel area (9). The installation position of the TO tube socket located in the center corresponds to the water flow intersection point formed by the diamond diverting column (5) in the diamond mesh channel area (9), and the installation position of the TO tube socket located at the edge corresponds to the water flow inflection point formed by the stepped guide wall and the diamond diverting column (5) located at the edge.
4. The high-efficiency cooling device for a laser source according to claim 2, characterized in that: The inlet rectifier area (8) is provided with a flat-plate diverter column, which includes a right diverter column (2), a middle diverter column (3), and a left diverter column (4). The middle diverter column (3) is directly opposite the medium inlet (1). The distance between the left diverter column (4) and the middle diverter column (3) is equal to the distance between the right diverter column (2) and the middle diverter column (3). The left diverter column (4) and the right diverter column (2) are provided with diamond-shaped diverter columns (5) on both sides.
5. The high-efficiency cooling device for a laser source according to claim 1, characterized in that: The frontal surface of the flat-plate flow divider is a streamlined curved surface.
6. The high-efficiency cooling device for a laser source according to claim 2, characterized in that: The outlet convergence area (10) includes a trapezoidal channel, in which several rows of rhomboid diverter columns (5) are evenly arranged. The number of rhomboid diverter columns (5) in each row is one less than the number of rhomboid diverter columns (5) in the left row, and the row of rhomboid diverter columns (5) closest to the medium outlet (6) contains an odd number of rhomboid diverter columns (5).
7. The high-efficiency cooling device for a laser source according to claim 1, characterized in that: The medium inlet (1) and the medium outlet (6) are arranged symmetrically, and their apertures are equal.
8. The high-efficiency cooling device for a laser source according to claim 1, characterized in that: The cooling substrate (7) is made of any one of stainless steel, pure copper, or oxygen-free copper.