Optical fiber laser cooling and heat dissipation device and heat dissipation method

Abstract

The invention discloses an optical fiber laser cooling heat dissipation device and a heat dissipation method, and belongs to the field of optical fiber lasers, the optical fiber laser cooling heat dissipation device comprises a box body, a first installation area and a second installation area are arranged in the box body in a separated mode, an optical fiber laser and a cooling plate are arranged in the first installation area, and a liquid cooling medium is contained in the cooling plate; the second mounting area is provided with a heat dissipation assembly, and the heat dissipation assembly is connected with the cooling plate so as to cool the liquid cooling medium; the optical fiber laser comprises a pumping source assembly, a concave portion is correspondingly arranged on the cooling plate, and the outer wall of the pumping source assembly and the concave portion are arranged in a coplanar mode so that the surface of the pumping source assembly can make contact with the liquid cooling medium. According to the cooling and heat dissipation device for the optical fiber laser, the concave part is arranged on the cooling plate, and the pumping source assembly and the cooling plate are arranged in the same plane, so that the liquid cooling medium in the cooling plate directly cools the pumping source assembly, the cooling effect on the optical fiber laser is greatly improved, and it is ensured that the working temperature of the optical fiber laser is accurate and controllable.

Description

Technical Field

[0001] The invention belongs to the field of optical fiber lasers, and in particular relates to an optical fiber laser cooling and heat dissipation device and a heat dissipation method. Background Art

[0002] Fiber laser refers to a laser that uses rare earth-doped glass fiber as a gain medium. Fiber laser can be developed based on fiber amplifiers: under the action of pump light, high power density is easily formed in the optical fiber, causing a "particle number inversion" in the laser energy level of the laser working material. By appropriately adding a positive feedback loop, laser oscillation output can be formed.

[0003] Fiber lasers have a wide range of applications, including laser fiber communications, laser space long-distance communications, industrial shipbuilding, automobile manufacturing, laser engraving, laser marking, laser cutting, military defense security, medical equipment and instruments, large-scale infrastructure, etc. Fiber lasers are widely used in the field of laser processing due to their compact structure, flexible operation and low operating costs. However, the current photoelectric conversion efficiency of lasers is around 40%, and most of the electrical energy is converted into waste heat. In order to ensure the stable operation of fiber lasers, fiber lasers need to be cooled.

[0004] At present, traditional fiber lasers use water cooling to dissipate heat. The circulating water in the chiller is cooled by a compressor, and the circulating water is used to flow in the cold plate, and then the cold plate is used to cool the components of the fiber laser. However, in conventional cooling methods, in order to ensure the cooling effect, the overall size of the chiller is often large, which greatly increases the overall size of the fiber laser. In addition, the cooling efficiency of the chiller is low, and it is often impossible to achieve rapid cooling of the fiber laser, resulting in uncontrollable operating temperature of the fiber laser and limited working efficiency. Summary of the invention

[0005] In view of one or more of the above defects or improvement needs of the prior art, the present invention provides a fiber laser cooling and heat dissipation device to solve the problem that the existing fiber laser cooling device is large in size and has poor cooling efficiency, which limits the working efficiency of the fiber laser.

[0006] To achieve the above object, the present invention provides a fiber laser cooling and heat dissipation device, which comprises:

[0007] A box body, wherein a first installation area and a second installation area are provided in the box body and are separated from each other;

[0008] A fiber laser and a cooling plate are provided in the first installation area, the fiber laser is attached to the surface of the cooling plate, and a liquid cooling medium is placed in the cooling plate;

[0009] A heat dissipation component is provided in the second installation area, and the heat dissipation component is connected to the cooling plate and is used to guide the liquid cooling medium out for cooling and transporting it to the cooling plate;

[0010] The fiber laser includes a pump source component. A recessed portion is provided on the cooling plate. The pump source component is arranged in the recessed portion. The outer wall of the pump source component is coplanar with the recessed portion so that the surface of the pump source component contacts the liquid cooling medium.

[0011] As a further improvement of the present invention, the pump source assembly includes a pump diode, an upper cover and a lower cover arranged outside the pump diode, the upper cover and the lower cover form a housing space for the pump diode, and the lower cover forms a recessed portion of the cooling plate;

[0012] The cooling plate is provided with a first cooling channel arranged in the same direction as the pump diode, and a liquid cooling medium flows in the first cooling channel.

[0013] As a further improvement of the present invention, the heat dissipation component includes a radiator arranged in the second installation area, the radiator is formed by winding an S-shaped pipe, the cooling plate is provided with a medium input end and a medium output end on the side facing the heat dissipation component, a cooling pipe is wound inside the cooling plate, and the two ends of the cooling pipe are respectively connected to the medium input end and the medium output end, a cooling pipe is wound inside the cooling plate, and the two ends of the cooling pipe are respectively connected to the medium input end and the medium output end, and the cooling pipe is connected to the first cooling flow channel;

[0014] Two ends of the S-shaped pipe are respectively connected to the medium input end and the medium output end. A heat dissipation fin is arranged outside the S-shaped pipe. At least one fan is arranged at one end of the heat dissipation fin away from the S-shaped pipe.

[0015] As a further improvement of the present invention, a first connecting pipe is provided between the S-shaped pipe and the medium input end, and a refrigerant storage tank and an electromagnetic pump are provided on the first connecting pipe.

[0016] As a further improvement of the present invention, the liquid cooling medium is stored in the refrigerant storage tank, and the liquid cooling medium is liquid metal, and the melting point of the liquid metal is lower than 4°C.

[0017] As a further improvement of the present invention, the liquid metal is mercury or gallium-indium alloy.

[0018] As a further improvement of the present invention, a second connecting pipe is provided between the S-shaped pipe and the medium output end, and a temperature sensor and a heating component are provided on the second connecting pipe;

[0019] The heat dissipation component also includes a control component, which is electrically connected to the electromagnetic pump, the temperature sensor, the heating component and the fan respectively, and is used to control the pump pressure of the electromagnetic pump, the heating power of the heating component and the rotation speed of the fan.

[0020] As a further improvement of the present invention, the fiber laser comprises a fiber combiner, a grating, a laser output head and a plurality of the pump source components;

[0021] The plurality of pump source components are connected to the fiber combiner via optical fiber, the fiber combiner is connected to the grating via optical fiber, the grating is connected to the laser output head via optical fiber, and the output end of the laser output head at least partially extends out of the box.

[0022] As a further improvement of the present invention, the present application also includes a heat dissipation method for a fiber laser, which performs cooling and heat dissipation through the fiber laser cooling and heat dissipation device, comprising the following steps:

[0023] S1, the fiber laser starts working, the control module controls the electromagnetic pump to start, the electromagnetic pump pumps the liquid cooling medium in the refrigerant storage tank into the cooling plate, and the liquid cooling medium cools down the components of the fiber laser;

[0024] S2. Setting the operating temperature threshold and warning threshold according to the operating environment temperature of the fiber laser;

[0025] S3, the temperature sensor senses the working temperature of the liquid cooling medium;

[0026] When the operating temperature of the liquid cooling medium is lower than the lowest value of the operating temperature threshold, the control module controls the heating component to continue heating the liquid cooling medium until the temperature sensor senses that the temperature of the liquid cooling medium is at the set operating temperature threshold;

[0027] When the working temperature of the liquid cooling medium is greater than the highest value of the working temperature threshold, the control module increases the pump pressure of the electromagnetic pump, and at the same time the control module controls the fan to rotate until the temperature sensor senses that the temperature of the liquid cooling medium is at the set working temperature threshold;

[0028] When the operating temperature of the liquid cooling medium approaches the warning threshold, the control component adjusts the fan speed to the maximum; when the operating temperature of the liquid cooling medium exceeds the warning threshold, the control module sends a command to shut down the fiber laser and the electromagnetic pump.

[0029] The above-mentioned improved technical features can be combined with each other as long as they do not conflict with each other.

[0030] In general, compared with the prior art, the above technical solution conceived by the present invention has the following beneficial effects:

[0031] (1) The fiber laser cooling and heat dissipation device of the present invention provides a recessed portion on the cooling plate, arranges the pump source assembly, the core heat generating component of the fiber laser, in a recessed form on the cooling plate, and arranges the pump source assembly and the cooling plate coplanarly, so that the liquid cooling medium in the cooling plate directly cools the pump source assembly, greatly improving the cooling effect on the fiber laser and ensuring that the operating temperature of the fiber laser is accurately controllable.

[0032] (2) The fiber laser cooling and heat dissipation device of the present invention uses liquid metal as the cooling medium. The liquid metal has good heat exchange efficiency and can achieve efficient cooling of the fiber laser. At the same time, the liquid metal can also avoid the corrosion effect of traditional liquids on the blades in the electromagnetic pump, ensuring the efficient and stable operation of the cooling and heat dissipation device.

[0033] (3) The fiber laser cooling and heat dissipation device of the present invention has a lower cover made of pure copper, which has good thermal conductivity and welding ability, so as to facilitate heat exchange between the pump diode and the liquid cooling medium, and to facilitate the integration of the pump original component and the cooling plate; at the same time, the cooling plate is made of aluminum alloy, which has good thermal conductivity and reduces the overall mass, making the fiber laser easy to carry as a whole, so as to adapt to portable use under various working conditions.

[0034] (4) The fiber laser cooling and heat dissipation device of the present invention, by arranging a temperature sensor and a heating assembly on the second connecting tube, makes the fiber laser cooling and heat dissipation device in the present application not only adapt to the heat dissipation of the fiber laser under general working conditions, but also can heat the liquid cooling medium in a low temperature environment to maintain the fiber laser at a set working temperature, thereby ensuring efficient and stable operation of the fiber laser.

[0035] (5) The fiber laser cooling and heat dissipation method of the present invention can control the operating temperature of the fiber laser within a set operating temperature range to ensure high-efficiency operation of the fiber laser; at the same time, by setting a warning threshold, the safe and stable operation of the fiber laser is ensured. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 1 is a schematic diagram of the overall structure of a fiber laser cooling and heat dissipation device in an embodiment of the present invention;

[0037] Figure 2 2 is a schematic diagram of the structure of the cooling plate in an embodiment of the present invention;

[0038] Figure 3 It is a schematic flow chart of a fiber laser cooling and heat dissipation method in an embodiment of the present invention.

[0039] In all the drawings, the same reference numerals represent the same technical features, specifically:

[0040] 1. Box; 2. Cooling plate; 3. Pump source component; 4. First cooling channel; 5. Radiator; 6. Medium input end; 7. Medium output end; 8. Fan; 9. First connecting pipe; 10. Refrigerant storage tank; 11. Electromagnetic pump; 12. Cooling pipe; 13. Second connecting pipe; 14. Temperature sensor; 15. Heating component; 16. Control component; 17. Fiber combiner; 18. Grating; 19. Laser output head; 20. S-shaped pipe;

[0041] 301, pump diode; 302, upper cover; 303, lower cover. DETAILED DESCRIPTION

[0042] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention. In addition, the technical features involved in the various embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0043] In the description of the present invention, it should be understood that, unless otherwise specified, terms such as “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 are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention.

[0044] In addition, unless otherwise specified, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0045] 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 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, 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.

[0046] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0047] Example:

[0048] See also Figures 1 to 3 The fiber laser cooling and heat dissipation device in the preferred embodiment of the present invention comprises a box 1, wherein the box 1 is provided with a first installation area and a second installation area which are separated and arranged, wherein the first installation area is provided with a fiber laser and a cooling plate 2, the fiber laser is attached to the surface of the cooling plate 2, and the cooling plate 2 contains a liquid cooling medium, which is used to cool the fiber laser and maintain the working temperature of the fiber laser; the second installation area is provided with a heat dissipation component, the heat dissipation component is connected to the cooling plate 2, and is used to guide the liquid cooling medium out for cooling and transporting it to the cooling plate 2, the heat dissipation component is mainly used to cool the liquid cooling medium, and the heat exchange between the fiber laser and the heat dissipation component is realized through the liquid cooling medium, so as to realize the heat dissipation of the fiber laser. In addition, the fiber laser comprises a pump source component 3, the cooling plate 2 is provided with a corresponding recessed portion, the pump source component 3 is arranged in the recessed portion, and the outer wall of the pump source component 3 is arranged coplanar with the recessed portion, so that the surface of the pump source component 3 is in contact with the liquid cooling medium.

[0049] The fiber laser cooling and heat dissipation device in the present application arranges the pump source assembly 3, the core heat-generating component of the fiber laser, in a recessed form on the cooling plate 2 by providing a recessed portion on the cooling plate 2, and arranges the pump source assembly 3 and the cooling plate 2 coplanarly, so that the liquid cooling medium in the cooling plate 2 directly cools the pump source assembly 3, greatly improving the cooling effect on the fiber laser and ensuring that the operating temperature of the fiber laser is accurately controllable.

[0050] Further, as another optional embodiment of the present invention, the pump source assembly 3 in the present application includes a pump diode 301, and an upper cover 302 and a lower cover 303 arranged outside the pump diode 301, the upper cover 302 and the lower cover 303 constitute a housing space for the pump diode 301, and the lower cover 303 forms a recessed portion of the cooling plate 2 in the present application; at the same time, the cooling plate 2 is provided with a first cooling channel 4 arranged in the same direction as the pump diode 301, and a liquid cooling medium flows in the first cooling channel 4. Specifically, the pump source assembly 3 in the present application includes a pump diode 301, an upper cover 302 and a lower cover 303, and the lower cover 303 is the recessed portion of the cooling plate 2, and the lower cover 303 is arranged integrally with the cooling plate 2, so that the liquid cooling medium in the cooling plate 2 can directly cool the pump diode 301, thereby improving the heat dissipation effect of the pump diode 301. At the same time, in order to avoid the problem of poor heat exchange between the fiber laser and the liquid cooling medium caused by the random flow of the liquid cooling medium in the cooling plate 2, the present application corresponds to setting a first cooling channel 4 in the cooling plate 2, and realizing efficient heat exchange with the pump diode 301 by regulating the flow direction of the liquid cooling medium.

[0051] Preferably, the lower cover 303 in the present application is pure copper, which has good thermal conductivity and welding ability, so as to facilitate heat exchange between the pump diode 301 and the liquid cooling medium, and to facilitate the integration of the pump source assembly 3 and the cooling plate 2. Furthermore, the cooling plate 2 in the present application is made of aluminum alloy, which also has good heat conduction effect and is light in overall weight, so that the fiber laser is easy to carry as a whole, so as to adapt to portable use under various working conditions.

[0052] Further, as an optional embodiment of the present invention, the heat dissipation assembly in the present application includes a radiator 5 arranged in the second installation area, the radiator 5 is formed by winding an S-shaped pipe 20, and the cooling plate 2 is provided with a medium input end 6 and a medium output end 7 on the side facing the heat dissipation assembly, and the cooling pipe 12 is connected to the first cooling channel 4. At the same time, the two ends of the S-shaped pipe 20 are respectively connected to the medium input end 6 and the medium output end 7, and the outside of the S-shaped pipe 20 is provided with a heat dissipation fin, and at least one fan 8 is provided at the end of the heat dissipation fin away from the S-shaped pipe 20. The heat dissipation assembly is mainly used to cool the cooling medium and re-input the cooling medium into the cooling plate 2. Therefore, the present application corresponds to the use of an S-shaped pipe 20 to coil to form a radiator 5, and heat dissipation fins and a fan 8 are provided on the surface of the pipe. The heat dissipation fins increase the heat exchange efficiency between the S-shaped pipe 20 and the external air, and the fan 8 realizes rapid convection of air to cool the liquid cooling medium in the S-shaped pipe 20.

[0053] At the same time, in the present application, a cooling pipe 12 is coiled inside the cooling plate 2, and the two ends of the cooling pipe 12 are respectively connected to the medium input end 6 and the medium output end 7, and the cooling pipe 12 is connected to the first cooling channel 4. In order to ensure that the liquid cooling medium flows in an orderly manner in the cooling plate 2 and realize efficient cooling of the optical fiber laser, the cooling pipe 12 is also coiled inside the cooling plate 2 in the present application. At the same time, the arrangement direction of the pump source assembly 3 in the present application is perpendicular to the coiling direction of the cooling pipe 12. In order to increase the contact area between the pump source assembly 3 and the liquid cooling medium, the present application correspondingly sets the first cooling channel 4. The liquid cooling medium in the cooling pipe 12 can directly flow into the first cooling channel 4, and the first cooling channel 4 is directly attached to the surface of the lower cover 303 to realize efficient cooling of the pump diode 301.

[0054] Preferably, the pump source component 3 in the present application is arranged at one end of the cooling pipe 12 close to the medium input end 6. At this time, the liquid cooling medium does not exchange heat with other components of the fiber laser, and has a good cooling effect.

[0055] Further, as an optional embodiment of the present invention, a first connecting pipe 9 is further provided between the S-shaped pipe 20 and the medium input end 6 in the present application, and a refrigerant storage tank 10 and an electromagnetic pump 11 are provided on the first connecting pipe 9 in the present application. The refrigerant storage tank 10 is mainly used to store liquid cooling medium, and the electromagnetic pump 11 is mainly used to pump the liquid cooling medium in the refrigerant storage tank 10 into the cooling plate 2 to cool the fiber laser. The electromagnetic pump 11 is basically noiseless during operation, which can ensure the silent operation of the fiber laser.

[0056] Furthermore, the liquid cooling medium stored in the refrigerant storage tank 10 in the present application is liquid metal, and the melting point of the liquid metal is lower than 4°C. The liquid metal basically meets the conventional operating temperature, and it basically remains in liquid state at room temperature. It can flow in the cooling plate 2 and cool the fiber laser. Liquid metal is a metal material, which has good heat exchange efficiency and can achieve efficient cooling of the fiber laser. At the same time, liquid metal can also avoid the corrosion effect of traditional liquids on the blades in the electromagnetic pump 11, ensuring the efficient and stable operation of the cooling and heat dissipation device.

[0057] Preferably, the liquid cooling medium in the present application is mercury or gallium-indium alloy. The melting point of mercury is -38.8°C, and the melting point of gallium-indium alloy is -28.8°C. Both are liquid at room temperature or low temperature, which facilitates the liquid cooling medium to flow and dissipate heat in the cooling and heat dissipation device.

[0058] Furthermore, a second connecting pipe 13 is provided between the S-shaped pipe 20 and the medium output end 7 in the present application, and a temperature sensor 14 and a heating component 15 are provided on the second connecting pipe 13. The temperature sensor 14 is mainly used to sense the temperature of the liquid cooling medium, so that the heating component 15 or the fan 8 can heat or dissipate the liquid cooling medium, so as to realize the controllable temperature of the liquid cooling medium, thereby ensuring the controllable working temperature of the fiber laser.

[0059] Optionally, the S-shaped pipe 20, the first connecting pipe 9, the second connecting pipe 13 and the cooling pipe 12 in the present application may be arranged in an integrated manner or in sections.

[0060] At the same time, the heat dissipation component also includes a control component 16, which is electrically connected to the electromagnetic pump 11, the temperature sensor 14, the heating component 15 and the fan 8, and the control component 16 is used to control the pump pressure of the electromagnetic pump 11, the heating power of the heating component 15 and the speed of the fan 8. The control component 16 controls the working conditions of the electromagnetic pump 11, the temperature sensor 14, the heating component 15 and the fan 8 respectively, so as to realize the precise control of the working temperature of the fiber laser.

[0061] Further, as an optional embodiment of the present invention, the fiber laser in the present application includes a fiber combiner 17, a grating 18, a laser output head 19 and a plurality of pump source components 3, wherein the plurality of pump source components 3 are connected to the fiber combiner 17 via optical fibers, the fiber combiner 17 is connected to the grating 18 via optical fibers, the grating 18 is connected to the laser output head 19 via optical fibers, and the output end of the laser output head 19 at least partially extends out of the housing 1. The fiber laser is constructed as a conventional fiber laser structure, which will not be described in detail here. The present application mainly attaches the pump source component 3, the fiber combiner 17, the grating 18, etc. to the layout line of the cooling channel to improve the heat dissipation efficiency of each component of the fiber laser.

[0062] Furthermore, as another embodiment of the present invention, the present application also includes a heat dissipation method for a fiber laser, which is cooled and dissipated by the fiber laser cooling and heat dissipation device in the embodiment of the present application, and includes the following steps:

[0063] S1, the fiber laser starts working, the control module controls the electromagnetic pump 11 to start, the electromagnetic pump 11 pumps the liquid cooling medium in the refrigerant storage tank 10 into the cooling plate 2, and the liquid cooling medium cools down the components of the fiber laser;

[0064] S2. Setting the operating temperature threshold and warning threshold according to the operating environment temperature of the fiber laser;

[0065] S3, the temperature sensor 14 senses the working temperature of the liquid cooling medium;

[0066] When the operating temperature of the liquid cooling medium is lower than the lowest value of the operating temperature threshold, the control module controls the heating component 15 to continue heating the liquid cooling medium until the temperature sensor 14 senses that the temperature of the liquid cooling medium is at the set operating temperature threshold;

[0067] When the working temperature of the liquid cooling medium is greater than the highest value of the working temperature threshold, the control module increases the pump pressure of the electromagnetic pump 11, and at the same time the control module controls the fan 8 to rotate until the temperature sensor 14 senses that the temperature of the liquid cooling medium is at the set working temperature threshold;

[0068] When the operating temperature of the liquid cooling medium approaches the warning threshold, the control component 16 adjusts the speed of the fan 8 to the maximum; when the operating temperature of the liquid cooling medium exceeds the warning threshold, the control module sends an instruction to shut down the fiber laser and the electromagnetic pump 11.

[0069] Optionally, the operating temperature threshold in the present application is 18-23°C, and the warning threshold in the present application is 50°C. When the temperature of the liquid cooling medium exceeds 45°C, it is determined that the operating temperature of the liquid cooling medium is close to the warning threshold. Optionally, the fiber laser can be turned off manually after the control component 16 issues an alarm at the warning threshold, or the fiber laser can be electrically connected to the control component 16 to directly turn off the fiber laser.

[0070] Through the cooling and heat dissipation method of the fiber laser in the present application, the operating temperature of the fiber laser can be controlled within the set operating temperature range, ensuring the high-efficiency operation of the fiber laser; at the same time, by setting the warning threshold, the safe and stable operation of the fiber laser is ensured.

[0071] It will be easily understood by those skilled in the art that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A fiber laser cooling and heat dissipation device, characterized in that: include: A box body, wherein a first installation area and a second installation area are provided in the box body and are separated from each other; A fiber laser and a cooling plate are provided in the first installation area, the fiber laser is attached to the surface of the cooling plate, and a liquid cooling medium is placed in the cooling plate; A heat dissipation component is provided in the second installation area, and the heat dissipation component is connected to the cooling plate and is used to guide the liquid cooling medium out for cooling and transporting it to the cooling plate; The fiber laser includes a pump source component. A recessed portion is provided on the cooling plate. The pump source component is arranged in the recessed portion. The outer wall of the pump source component is coplanar with the recessed portion so that the surface of the pump source component contacts the liquid cooling medium.

2. The fiber laser cooling and heat dissipation device according to claim 1, characterized in that: The pump source assembly includes a pump diode, an upper cover and a lower cover arranged outside the pump diode, the upper cover and the lower cover forming a housing space for the pump diode; the lower cover forming a recessed portion of the cooling plate; The cooling plate is provided with a first cooling channel arranged in the same direction as the pump diode, and a liquid cooling medium flows in the first cooling channel.

3. The fiber laser cooling and heat dissipation device according to claim 1 or 2, characterized in that: The heat dissipation component includes a radiator arranged in the second installation area, the radiator is formed by winding an S-shaped pipe, the cooling plate is provided with a medium input end and a medium output end on the side facing the heat dissipation component, a cooling pipe is wound inside the cooling plate, two ends of the cooling pipe are respectively connected to the medium input end and the medium output end, and the cooling pipe is connected to the first cooling flow channel; Two ends of the S-shaped pipe are respectively connected to the medium input end and the medium output end. A heat dissipation fin is arranged outside the S-shaped pipe. At least one fan is arranged at one end of the heat dissipation fin away from the S-shaped pipe.

4. The fiber laser cooling and heat dissipation device according to claim 3, characterized in that: A first connecting pipe is provided between the S-shaped pipe and the medium input end, and a refrigerant storage tank and an electromagnetic pump are provided on the first connecting pipe.

5. The fiber laser cooling and heat dissipation device according to claim 4, characterized in that: The refrigerant storage tank stores the liquid cooling medium, which is liquid metal, and the melting point of the liquid metal is lower than 4°C.

6. The fiber laser cooling and heat dissipation device according to claim 5, characterized in that: The liquid metal is mercury or gallium-indium alloy.

7. The fiber laser cooling and heat dissipation device according to claim 4, characterized in that: A second connecting pipe is provided between the S-shaped pipe and the medium output end, and a temperature sensor and a heating component are provided on the second connecting pipe; the heat dissipation component also includes a control component, and the control component is electrically connected to the electromagnetic pump, the temperature sensor, the heating component and the fan respectively, so as to control the pump pressure of the electromagnetic pump, the heating power of the heating component and the speed of the fan.

8. The fiber laser cooling and heat dissipation device according to claim 1, characterized in that: The fiber laser comprises a fiber combiner, a grating, a laser output head and a plurality of pump source components; The plurality of pump source components are connected to the fiber combiner via optical fiber, the fiber combiner is connected to the grating via optical fiber, the grating is connected to the laser output head via optical fiber, and the output end of the laser output head at least partially extends out of the box.

9. A method for cooling a fiber laser, wherein the cooling and heat dissipation is performed by using the fiber laser cooling and heat dissipation device as claimed in any one of claims 1 to 8, characterized in that: The steps include: S1. The fiber laser starts working, the control module controls the electromagnetic pump to start, and the electromagnetic pump pumps the liquid cooling medium in the refrigerant storage tank into the cooling plate, and the liquid cooling medium cools down the components of the fiber laser; S2. Setting the operating temperature threshold and warning threshold according to the operating environment temperature of the fiber laser; S3, the temperature sensor senses the working temperature of the liquid cooling medium; When the operating temperature of the liquid cooling medium is lower than the lowest value of the operating temperature threshold, the control module controls the heating component to continue heating the liquid cooling medium until the temperature sensor senses that the temperature of the liquid cooling medium is at the set operating temperature threshold; When the working temperature of the liquid cooling medium is greater than the highest value of the working temperature threshold, the control module increases the pump pressure of the electromagnetic pump, and at the same time the control module controls the fan to rotate until the temperature sensor senses that the temperature of the liquid cooling medium is at the set working temperature threshold; When the operating temperature of the liquid cooling medium approaches the warning threshold, the control component adjusts the fan speed to the maximum; when the operating temperature of the liquid cooling medium exceeds the warning threshold, the control module sends a command to shut down the fiber laser and the electromagnetic pump.

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