Water cooling device and laser

Abstract

The utility model discloses a water cooling device and a laser, the water cooling device comprises a body and at least one air trapping hole, a plurality of water cooling channels extending in the same direction are arranged in the body at intervals, one of two adjacent water cooling channels is configured to be a forward flow channel, and the other one is configured to be a reverse flow channel. The tail end of the forward flow channel and the head end of the reverse flow channel are converged to form a confluence cavity; the air trapping hole communicates with the confluence cavity to form a pressure relief space, and cooling water in the water cooling channel can enter the air trapping hole through pressure in the condensation expansion process. According to the water cooling device, the pressure relief space is formed in the water cooling device, cooling water in the water cooling channel can enter the pressure relief space in the condensation expansion process so as to buffer stress generated when the cooling water is frozen, and the pressure relief space is adopted to absorb the volume increased by condensation expansion of the cooling water; therefore, cracking of the water cooling device body caused by condensation expansion of the cooling water is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of water cooling devices for lasers, in particular to a water cooling device and a laser. Background Art

[0002] In the field of lasers, heat dissipation plays a decisive role in the stable working performance of lasers. The heat of the laser is mainly concentrated on the semiconductor pump source laser. If the heat cannot be dissipated in time, it will cause the device temperature to be too high, the LD output power to be reduced, the performance of the optical device to be weakened, and the overall performance of the laser to be affected. It may even exceed the limit temperature, and eventually lead to system crash. At present, medium and high power lasers usually dissipate heat by liquid cooling, that is, the heat in the laser is transferred to the liquid cooling medium through the heat conduction plate, and then the heat is taken away by circulating the cooling medium to achieve the purpose of cooling. The water cooling plate is the main component of liquid cooling technology, which has multiple flow channels inside for passing cooling water or other cooling media. Compared with air cooling or oil cooling, water cooling has the advantages of good cooling effect, can effectively reduce the temperature of the laser and ensure its stable operation.

[0003] However, the applicant has found that the water-cooled plate in the prior art still has the following problems: in a low-temperature environment, when the coolant in the water-cooled plate is below the freezing point, the coolant freezes and causes the plate to expand, deform, or even crack, causing damage to the laser.

[0004] Therefore, in order to solve the problem in the prior art that the water cooling plate freezes in a low temperature environment, causing the water cooling device to rupture and thus causing damage to the laser, it is necessary to provide a water cooling device and a laser. Utility Model Content

[0005] In view of the above-mentioned shortcomings of the prior art, the purpose of the present invention is to provide a water cooling device and a laser, which are used to solve the problem in the prior art that the water cooling device freezes in a low temperature environment, causing the water cooling device to expand and crack, thereby damaging the laser.

[0006] To achieve the above purpose, the technical solution adopted by this new type of use is:

[0007] A water cooling device, the water cooling device comprising:

[0008] A body, wherein a plurality of water cooling channels extending in the same direction are arranged at intervals in the body, wherein one of two adjacent water cooling channels is configured as a forward flow channel, and the other is configured as a reverse flow channel, and the tail end of the forward flow channel merges with the head end of the reverse flow channel to form a confluence cavity; and

[0009] At least one air trap hole is communicated with the confluence cavity to form a pressure relief space, and cooling water in the water cooling channel can enter the air trap hole under pressure during the condensation and expansion process.

[0010] As a preferred solution, the water cooling device further comprises a plug assembly for sealing the water cooling channel, and the air trapping hole is arranged in the plug assembly.

[0011] As a preferred solution, the plug assembly and the body are fixed by welding.

[0012] As a preferred solution, the main body is configured as a pump source, and the air trapping holes are arranged on the surface of the pump source cooling module.

[0013] As a preferred solution, a plurality of water cooling channels are formed by extrusion of the body of the water cooling device.

[0014] As a preferred solution, a water inlet is provided at the end of the water cooling device, the water inlet is arranged opposite to the water inlet port of the water cooling channel, and the cross-sectional area of ​​the water inlet is not less than the cross-sectional area of ​​the water inlet port.

[0015] As a preferred solution, at least one third partition plate is provided in a single water-cooling channel to further form a microfluidic channel.

[0016] As a preferred solution, the water cooling device also includes a first partition plate, which is used to divide the inner cavity of the body and form a first heat dissipation area and a second heat dissipation area, and multiple water cooling channels are evenly distributed in the first heat dissipation area and the second heat dissipation area.

[0017] As a preferred solution, the cross-sectional shape of the microfluidic channel is rectangular.

[0018] As another aspect of the present application, a laser is also proposed, comprising any one of the above-mentioned water cooling devices.

[0019] As described above, the water cooling device provided by the utility model has the following beneficial effects:

[0020] 1. By setting a pressure relief space in the water cooling device, when the cooling water in the water cooling channel freezes and expands, part of the ice can enter the air trap holes, and the stress generated when the cooling water freezes can be buffered by the gas in the air trap holes, thereby preventing the water cooling device from bursting due to the low-temperature freezing and expansion of the internal cooling water;

[0021] 2. By arranging at least one third partition plate in the water cooling channel to further form a micro-flow channel, it is beneficial to strengthen the structural strength of the water channel and improve the antifreeze performance of the water cooling device;

[0022] 3. The laser using the water cooling device structure of the present application can adapt to the low temperature environment below the freezing point to a certain extent, effectively reducing the bulging and freezing cracking of the related structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] One or more embodiments are exemplarily described by pictures in the corresponding drawings, and these exemplified descriptions do not constitute limitations on the embodiments. Elements with the same reference numerals in the drawings represent similar elements, and unless otherwise stated, the figures in the drawings do not constitute proportional limitations.

[0024] Figure 1 It is a structural schematic diagram of the first embodiment of the water cooling device of the utility model;

[0025] Figure 2 It is a schematic structural diagram of the flow channel in the second embodiment of the water cooling device of the utility model;

[0026] Figure 3 for Figure 2 Cross-sectional view of the mid-flow channel structure;

[0027] Figure 4 for Figure 2 Side view of

[0028] Figure 5 for Figure 3 Cross-sectional view of BB.

[0029] Explanation of the reference numerals: 100, pressure relief space; 105, first plug; 106, second plug; 301, first partition plate; 302, second partition plate; 303, third partition plate; 400, water outlet joint; 500, water inlet joint; 11, water inlet; 22, first confluence chamber; 13, second confluence chamber; 21, third confluence chamber; 12, water outlet; 31, water cooling channel. DETAILED DESCRIPTION

[0030] In order to facilitate the understanding of the utility model, the utility model is described in more detail below in conjunction with the accompanying drawings and specific embodiments. It should be noted that when an element is described as "fixed to" another element, it can be directly on another element, or there can be one or more centered elements therebetween. When an element is described as "electrically connected" to another element, it can be directly connected to another element, or there can be one or more centered elements therebetween. The orientation or positional relationship indicated by the terms "upper", "lower", "inner", "outer", "bottom" and the like used in this specification is based on the orientation or positional relationship shown in the accompanying drawings, only for the convenience of describing the utility model and simplifying the description, rather than indicating or implying 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 a limitation on the utility model. In addition, the terms "first", "second", "third" and the like are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0031] Unless otherwise defined, all technical and scientific terms used in this specification have the same meaning as those commonly understood by those skilled in the art in the technical field of the present invention. The terms used in the specification of the present invention are only for the purpose of describing specific embodiments and are not used to limit the present invention. The term "and / or" used in this specification includes any and all combinations of one or more related listed items.

[0032] In addition, the technical features involved in different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0033] Please refer to Figure 1 The utility model proposes a water cooling device, which includes a main body and at least one air trapping hole. A plurality of water cooling channels 31 extending in the same direction are arranged at intervals in the main body, wherein one of two adjacent water cooling channels 31 is configured as a forward flow channel, and the other is configured as a reverse flow channel, and the tail end of the forward flow channel merges with the head end of the reverse flow channel to form a confluence cavity; the air trapping hole is connected to the confluence cavity to form a pressure relief space 100, and the cooling water in the water cooling channel 31 can enter the air trapping hole through pressure during the condensation and expansion process.

[0034] It can be understood that in the embodiments of the present application, the forward channel and the reverse channel are arranged directly next to each other. While the cooling water circulates sequentially in the two, heat exchange can also be achieved, so that the temperature difference between the internal flow channels of the water cooling device is relatively small, and its consistency is better, which is beneficial to improve the consistency of the internal temperature of the water cooling device, so that the laser is more uniform in temperature as a whole during use, which is beneficial to increase the service life of the laser.

[0035] In one embodiment, gas is provided in the air trapping hole. When cooling water enters the air trapping hole from the water cooling channel 31 under pressure during the condensation and expansion process, the stress generated during freezing can be buffered by the compressed gas, thereby preventing the water cooling device from bulging or even bursting.

[0036] In this way, the present application sets a pressure relief space in the water cooling device. When the ambient temperature of the laser is above the freezing point, the cooling water in the water cooling channel 31 flows normally and takes away part of the heat generated by the laser. When the ambient temperature of the laser drops to the freezing point or even below the freezing point, the cooling water in the water cooling channel 31 begins to freeze and expand. A part of the ice can enter the accommodating cavity with gas, and the stress generated when the cooling water freezes is buffered by the gas. The cooling water that has not frozen continues to flow in the water cooling channel 31 until it freezes and enters the nearby pressure relief space 100, thereby avoiding the situation where the water cooling device is cracked due to the low-temperature freezing and expansion of the internal cooling water, and finally causing the laser to fail to work normally.

[0037] Now refer to Figures 1 to 5 And specific embodiments are provided to further explain the technical solution of the present application.

[0038] In one embodiment, the pressure relief space 100 is configured as at least one and is distributed at the position where the cooling water pressure of the water cooling device is the largest. Specifically, the pressure relief space 100 is distributed at the position where the actual hydraulic pressure in the water cooling device is greater than the hydraulic threshold. The hydraulic threshold refers to the maximum cooling water pressure that the structure forming the cooling water channel can withstand. Providing a pressure relief space at the position where the actual hydraulic pressure in the water cooling device is greater than the hydraulic threshold is further conducive to avoiding the occurrence of bulging and cracking of the water cooling device plate.

[0039] Please refer to Figure 1 , Figure 1 The schematic diagram of the structure of the first embodiment of the water cooling device of the utility model, in addition to the main body, the water cooling device also includes a plug assembly for sealing the water cooling channel, and the air trap hole is arranged in the plug assembly. The plug assembly specifically includes a first plug 105 and a second plug 106 to seal the front end and the rear end of the main body respectively. Optionally, the first plug 105 and the second plug 106 are respectively fixed to the main body by welding, and the welding method can be laser welding or argon arc welding.

[0040] The air-trapping hole can be understood as a pressure relief groove, and the pressure relief groove can form a blind hole structure or a through hole structure.

[0041] In some embodiments, when the body is configured as a pump source, the air trapping holes are disposed on a surface of a pump source cooling module.

[0042] For scenarios where the water-cooling channel is extruded, the processing method of the pressure relief structure in the form of air-trapping holes is relatively simple, and the arrangement position is relatively single, which is easier to process. In addition, the technical solution of the present application can also be used for the antifreeze of the pump source cooling module. For the pump source structure, it is usually equipped with heat-generating components such as chips and optical lenses. The heat generated by the pump source chip and the optical lenses is directly transferred to the cooling water flowing in the cooling channel of the cooling module through the heat sink. Providing air-trapping holes on the surface of the pump source cooling module is conducive to reducing its bulging phenomenon in a low-temperature environment.

[0043] Preferably, the plurality of water cooling channels 31 are formed by extruding the body of the water cooling device.

[0044] In order to strengthen the strength of the water cooling channel and further improve the antifreeze effect of the water cooling device, the present application proposes a second embodiment for the water cooling channel. Figure 2 and Figure 3The end of the body is provided with a water inlet 11 and a water outlet 12, and the water inlet 11 is arranged opposite to the water inlet port of the water cooling channel 31, so that the cooling water entering from the water inlet 11 flows into the water cooling channel 31 at the same time. The water cooling device also includes a water inlet joint 500 and a water outlet joint 400, the water inlet joint 500 is connected to the water inlet 11, and the water outlet joint 400 is connected to the water outlet 12.

[0045] In the water cooling device structure of the prior art, since the cross-sectional area of ​​the water inlet is much smaller than the cross-sectional area of ​​the water cooling channel directly connected thereto, and there are multiple water cooling channels, the cooling water cannot flow into all the water cooling channels when the water inlet is limited. In order to achieve the ideal cooling capacity, the water inlet needs to be increased, which will cause water waste.

[0046] Therefore, in the present application, in order to allow the cooling water entering from the water inlet 11 to flow simultaneously and completely into the water cooling channel 31, the water inlet 11 is arranged to be opposite to the water inlet port, and the cross-sectional area of ​​the water inlet 11 is not smaller than the cross-sectional area of ​​the water inlet port, which is conducive to allowing the cooling water entering from the water inlet 11 to flow simultaneously and completely into the water cooling channel 31, and finally be discharged from the water outlet 12.

[0047] Please continue to refer to Figure 1 or Figure 2 The main body includes a plurality of second partition plates 302 spaced apart from each other to form a plurality of water cooling channels 31. At least one third partition plate 303 is provided in a single water cooling channel 31 to further form a microfluidic channel. To ensure the strength of the water cooling device structure, the thickness of the second partition plate 302 is greater than the thickness of the third partition plate 303.

[0048] The water cooling device of the present application further includes a first partition plate 301, which divides the body to form a first heat dissipation area and a second heat dissipation area, and a plurality of water cooling channels 31 are evenly distributed in the first heat dissipation area and the second heat dissipation area. In addition, the thickness of the first partition plate 301 is greater than the thickness of the second partition plate 302, so that the water channel strength of the liquid cooling plate can be strengthened while achieving diversion, bearing the stress generated when the cooling water freezes, and further reducing the possibility of freezing and cracking of the liquid cooling plate.

[0049] Please refer to Figure 2 and Figure 3, the end of the first partition plate 301 away from the water inlet and outlet is not flush with the second partition plate 302, and a portion of the first partition plate 301 continues to protrude outward relative to the second partition plate 302 to form the first confluence chamber 22 and the third confluence chamber 21, and the second confluence chamber 13 is located at the end of the first partition plate 301 close to the water inlet and outlet. The first water-cooling channel (forward channel) is connected to the second water-cooling channel (reverse channel) through the first confluence chamber 22, the second water-cooling channel (reverse channel) is connected to the third water-cooling channel (forward channel) through the second confluence chamber 13, and the third water-cooling channel (forward channel) is connected to the fourth water-cooling channel (reverse channel) through the third confluence chamber 21. In this way, each water-cooling channel 31 is connected in sequence to form a complete channel for the cooling water entering from the water inlet 11 to flow.

[0050] In one embodiment, the water cooling channel 31 may be arranged in an S-shaped single cooling water channel or a double cooling water channel.

[0051] Please refer to Figure 5 , the cross-sectional shape of each microfluidic channel in the present application is a rectangle.

[0052] As another aspect of the present application, the present application also proposes a laser, comprising the water cooling device in any of the above solutions. Since the laser comprises the water cooling device in the above solution, it also has all the beneficial effects of the water cooling device.

[0053] The embodiments of the present invention have the following advantages over the prior art:

[0054] 1. By setting a pressure relief space in the water cooling device, when the cooling water in the water cooling channel freezes and expands, part of the ice can enter the air trap holes, and the stress generated when the cooling water freezes can be buffered by the gas in the air trap holes, thereby preventing the water cooling device from bursting due to the low-temperature freezing and expansion of the internal cooling water;

[0055] 2. By arranging at least one third partition plate in the water cooling channel to further form a micro-flow channel, it is beneficial to strengthen the structural strength of the water channel and improve the antifreeze performance of the water cooling device;

[0056] 3. The laser using the water cooling device structure of the present application can adapt to the low temperature environment below the freezing point to a certain extent, effectively reducing the bulging and freezing cracking of the related structure.

[0057] Therefore, the utility model effectively overcomes various shortcomings in the prior art and has high industrial utilization value.

[0058] The above embodiments are merely illustrative of the principles and effects of the present invention, and are not intended to limit the present invention. Anyone familiar with the technology may modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by a person of ordinary skill in the art without departing from the spirit and technical concept disclosed in the present invention shall still be covered by the claims of the present invention.

Claims

1. A water cooling device, characterized in that: The water cooling device comprises: A body, wherein a plurality of water cooling channels extending in the same direction are arranged at intervals in the body, wherein one of two adjacent water cooling channels is configured as a forward flow channel, and the other is configured as a reverse flow channel, and the tail end of the forward flow channel merges with the head end of the reverse flow channel to form a confluence cavity; and At least one air trapping hole is communicated with the confluence cavity to form a pressure relief space, and the cooling water in the water cooling channel can enter the air trapping hole by pressure during the condensation and expansion process.

2. The water cooling device according to claim 1, characterized in that: The water cooling device also includes a plug assembly for sealing the water cooling channel, and the air trap hole is arranged in the plug assembly.

3. The water cooling device according to claim 2, characterized in that: The plug assembly and the body are fixed by welding.

4. The water cooling device according to claim 1, characterized in that: The body is configured as a pump source, and the air trap holes are arranged on the surface of the pump source cooling module.

5. The water cooling device according to claim 1, characterized in that: The plurality of water cooling channels are formed by extruding the body of the water cooling device.

6. The water cooling device according to claim 1, characterized in that: A water inlet is arranged at the end of the water cooling device, and the water inlet is arranged opposite to the water inlet port of the water cooling channel, and the cross-sectional area of ​​the water inlet is not less than the cross-sectional area of ​​the water inlet port.

7. The water cooling device according to claim 3, characterized in that: At least one third partition plate is disposed in a single water-cooling channel to further form a microfluidic channel.

8. The water cooling device according to claim 3, characterized in that: The water cooling device also includes a first partition plate, which is used to separate the inner cavity of the body and form a first heat dissipation area and a second heat dissipation area. The plurality of water cooling channels are evenly distributed in the first heat dissipation area and the second heat dissipation area.

9. The water cooling device according to claim 7, characterized in that: The cross-sectional shape of the microfluidic channel is rectangular.

10. A laser, characterized in that: A water cooling device comprising the water cooling device according to any one of claims 1 to 9.

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