Jet water cooling device of guide laser and guide laser system

Abstract

The utility model provides a jet water cooling device for guiding laser and a guiding laser system. The jet water cooling device comprises a micro-channel heat exchanger, a semiconductor cooler and a radiator, the micro-channel heat exchanger is provided with a water inlet used for being connected with a water source and a water outlet used for being connected with the water-light coupling head and used for cooling the water source through refrigerants. The cold end of the semiconductor cooler is connected with the micro-channel heat exchanger and used for providing a refrigerant for the micro-channel heat exchanger. The radiator is connected with the hot end of the semiconductor cooler and used for taking away heat of the semiconductor cooler. The micro-channel heat exchanger cools a water source, the semiconductor cooler provides a refrigerant for the micro-channel heat exchanger, the radiator takes away heat of the semiconductor cooler, the cooling device can be designed to be lighter and thinner due to the arrangement of the micro-channel heat exchanger, and on the premise that the cooling effect is ensured, the size of the cooling device is made to be very small; the cooling device can be directly installed on the water-light coupling head, and the influence of the environment temperature on the temperature rise of jet water in the pipeline is reduced.

Description

Technical Field

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

[0002] Water-guided laser processing is mainly used in the fields of semiconductor and optoelectronic material processing, hard and brittle material processing, precision ceramic processing, aerospace processing, etc. In practical applications, by optimizing the water flow temperature and laser processing parameters, high-quality processing of different materials can be achieved, especially in the fields of precision ceramic processing, hard and brittle material processing, etc., water-guided laser technology shows obvious technical advantages due to its excellent cooling effect. The temperature of the jet water increases with the increase of the water-beam coupling length. The increase of the incident laser power, the decrease of the coupling cavity pressure, and the decrease of the jet diameter will cause the temperature of the jet water to increase, affecting the power of the water-laser coupling and thus affecting the processing accuracy, efficiency and stability.

[0003] Research shows that when the temperature of the jet water is 4-10°, the effect of the jet water temperature on the coupling between water and laser is minimal. The source of the jet water is mainly municipal tap water. The temperature of the water flow is greatly affected by the outdoor environment. The water flow temperature will change with the season and region. Therefore, it is necessary to cool the jet water entering the water-optical coupling head.

[0004] In the prior art, the cooling device for cooling the jet water generally adopts a finned heat exchanger in combination with a cooling fan for cooling. However, this cooling device is large in size and cannot be moved with the water-light coupling head. A long pipe is required to connect the cooling device and the water-light coupling head, and the ambient temperature will cause the temperature of the jet water in the pipe to rise. Utility Model Content

[0005] In view of this, the utility model proposes a jet water cooling device and a guided laser system for guiding lasers to solve the technical problems that the cooling device proposed in the above-mentioned background technology is large in size and cannot move with the water-light coupling head, a long pipe is required to connect the cooling device and the water-light coupling head, and the ambient temperature will cause the temperature of the jet water in the pipe to rise.

[0006] The technical solution of the utility model is achieved in this way:

[0007] In a first aspect, the utility model provides a jet water cooling device for guiding laser, comprising a microchannel heat exchanger, a semiconductor refrigerator and a radiator, wherein:

[0008] The microchannel heat exchanger is provided with a water inlet for connecting to a water source and a water outlet for connecting to a water-light coupling head, and is used to cool the water source by a refrigerant;

[0009] The cold end of the semiconductor refrigerator is connected to the microchannel heat exchanger to provide refrigerant to the microchannel heat exchanger;

[0010] The radiator is connected to the hot end of the semiconductor refrigerator and is used to take away the heat of the semiconductor refrigerator.

[0011] On the basis of the above technical solution, preferably, it also includes a vortex cooler and an air compressor, wherein the vortex cooler is connected to the air compressor and the radiator respectively, and is used to separate the energy of the compressed air introduced by the air compressor to obtain hot air and cold air, and provide the cold air to the radiator.

[0012] On the basis of the above technical solution, preferably, a throttle valve is further included, and two ends of the throttle valve are respectively connected to the vortex cooler and the air compressor to adjust the flow rate of compressed air entering the vortex cooler.

[0013] On the basis of the above technical solution, preferably, it also includes a connecting pipe, which is respectively connected to the cold air outlet of the vortex cooler and the radiator, and is used to guide and rectify the compressed air.

[0014] On the basis of the above technical solution, preferably, the connecting pipe includes a guide section and a rectifying section; the guide section is connected to the cold air outlet of the vortex cooler, the guide section has a truncated cone shape, and the outlet end has a larger diameter than the inlet end, and the inner wall of the guide section is provided with a plurality of guide plates parallel to the axial direction, and the guide plates are in an inverted V shape; the inlet end of the rectifying section is connected to the guide section, and the inlet end and the outlet end of the rectifying section are provided with a plurality of rectifying holes arranged relatively.

[0015] On the basis of the above technical solution, preferably, the shape of the rectifying hole is diamond, circle and rectangle.

[0016] On the basis of the above technical solution, preferably, the connecting pipe further comprises a gradually expanding pipe, and two ends of the gradually expanding pipe are respectively connected to the guide section and the rectifying section.

[0017] On the basis of the above technical solution, preferably, the radiator is a plate-fin type radiator.

[0018] On the basis of the above technical solution, preferably, the radiator is a CPU radiator.

[0019] In the second aspect, the utility model provides a guided laser system, including a pressure reducing valve, a water-light coupling head and the jet water cooling device for the guided laser described in the first aspect, wherein the pressure reducing valve is connected to a water source and the water inlet respectively, and the water-light coupling head is connected to the water outlet.

[0020] The laser-guided water-jet cooling device of the utility model has the following beneficial effects compared with the prior art:

[0021] (1) The water source is cooled by the refrigerant through the microchannel heat exchanger, the semiconductor refrigerator provides refrigerant to the microchannel heat exchanger, and the radiator takes away the heat of the semiconductor refrigerator; the setting of the microchannel heat exchanger can make the cooling device more lightweight, the radiator takes away the heat of the semiconductor refrigerator, and improves the cooling effect. The cooling device can be made very small on the premise of ensuring the cooling effect, and the cooling device can be directly installed on the water-light coupling head and move with the water-light coupling head. The cooling device is directly connected to the water-light coupling head to reduce the influence of the ambient temperature on the temperature increase of the jet water in the pipeline; and the risk of explosion caused by excessive temperature of the heat exchanger can be prevented, and the excess heat can be discharged to the environment in time, and it can also withstand high-pressure water flow;

[0022] (2) The vortex cooler is connected to the air compressor and the radiator respectively, and is used to separate the energy of the compressed air introduced by the air compressor to obtain hot air and cold air, and provide the cold air to the radiator, so as to discharge the heat of the radiator into the environment in time, and take away the heat of the semiconductor refrigerator more quickly, so as to avoid the risk of explosion due to over-temperature, improve the reliability and stability of the device, and at the same time improve the cooling efficiency of the device;

[0023] (3) adjusting the flow rate of compressed air entering the vortex cooler by means of a regulating valve, thereby controlling the amount of cold air entering the radiator, thereby adjusting the cooling efficiency;

[0024] (4) The cold air outlet of the vortex cooler and the radiator are respectively connected through a connecting pipe to guide and rectify the compressed air so that the cold air blown out by the vortex cooler can be evenly blown into the radiator, so that the radiator can fully exchange heat with the semiconductor refrigerator to improve the cooling effect;

[0025] (5) A plurality of guide plates parallel to the axial direction are provided through the inner wall of the guide section, and the guide plates are in an inverted V shape. After the cold air blows through the guide plates, a stable flow direction is formed without vortexes, and the air can diffuse. The inlet end of the rectifying section is connected to the guide section, and a plurality of rectifying holes are arranged relatively at the inlet and outlet ends of the rectifying section. After the cold air is guided, the cold air enters from the rectifying holes at the inlet end of the rectifying section, and then flows out from the rectifying holes at the outlet end of the rectifying section and enters the radiator, so that the cold air blown into the radiator by the vortex cooler can be more uniform. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0027] Figure 1 This is a schematic structural diagram of a laser-guided jet water cooling device of the utility model;

[0028] Figure 2 It is a structural schematic diagram of the connecting pipe of the utility model;

[0029] Figure 3 It is a structural schematic diagram of the diversion section of the utility model after it is unfolded;

[0030] Figure 4 This is a schematic diagram of the structure of the first rectifying section of the utility model;

[0031] Figure 5 This is a schematic diagram of the structure of the second rectifying section of the utility model;

[0032] Figure 6 This is a schematic structural diagram of the third rectifying section of the utility model;

[0033] Figure 7 It is a schematic structural diagram of the guiding laser system of the utility model.

[0034] Description of reference numerals: 1-microchannel heat exchanger, 2-semiconductor refrigerator, 3-radiator, 4-vortex cooler, 5-air compressor, 6-throttle valve, 7-connecting pipe;

[0035] 00-jet water cooling device; 100-pressure reducing valve, 200-water optical coupling head, 300-pure water machine, 400-pure water tank, 500-boosting pump, 600-accumulator, 700-laser transmitter, 800-collimator, 900-focuser;

[0036] 11-water inlet, 12-water outlet;

[0037] 21-cold end, 22-hot end;

[0038] 71- flow guide section, 711- flow guide plate, 72- flow straightening section, 721- flow straightening hole, 73- gradually expanding pipe. DETAILED DESCRIPTION

[0039] The following will be combined with the implementation of the utility model to clearly and completely describe the technical solutions in the implementation of the utility model. Obviously, the described implementation is only a part of the implementation of the utility model, not all of the implementations. Based on the implementation of the utility model, all other implementations obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0040] Reference Figure 1-Figure 7 As shown, the first embodiment of the utility model provides a jet water cooling device for guiding laser, comprising a microchannel heat exchanger 1, a semiconductor refrigerator 2 and a radiator 3, wherein:

[0041] The microchannel heat exchanger 1 is provided with a water inlet 11 for connecting to a water source and a water outlet 12 for connecting to a water-light coupling head 200, and is used to cool the water source by a refrigerant;

[0042] The cold end 21 of the semiconductor refrigerator 2 is connected to the microchannel heat exchanger 1 to provide refrigerant to the microchannel heat exchanger 1; one side of the cold end 21 of the semiconductor refrigerator 2 is attached to the microchannel heat exchanger 1, and one side of the hot end 22 is attached to the radiator 3;

[0043] The heat sink 3 is connected to the hot end 22 of the semiconductor refrigerator 2 to remove heat from the semiconductor refrigerator 2 .

[0044] The laser-guided jet water cooling device proposed in this embodiment cools the water source through the refrigerant through the microchannel heat exchanger 1, the semiconductor refrigerator 2 provides refrigerant to the microchannel heat exchanger 1, and the radiator 3 takes away the heat of the semiconductor refrigerator 2; the setting of the microchannel heat exchanger 1 can make the cooling device more lightweight, the radiator 3 takes away the heat of the semiconductor refrigerator 2, and improves the cooling effect. The cooling device can be made very small in size while ensuring the cooling effect. The cooling device can be directly installed on the water-light coupling head 200 and move with the water-light coupling head 200. The cooling device is directly connected to the water-light coupling head 200 to reduce the influence of the ambient temperature on the increase in the temperature of the jet water in the pipeline; and the risk of explosion due to excessive temperature of the heat exchanger can be prevented, and the excess heat can be discharged to the environment in time, and it can also withstand water flow with higher pressure.

[0045] In some embodiments, the jet water cooling device of the guided laser further includes a vortex cooler 4 and an air compressor 5, wherein the vortex cooler 4 is connected to the air compressor 5 and the radiator 3 respectively, and is used to separate the energy of the compressed air introduced by the air compressor 5 to obtain hot air and cold air, and provide the cold air to the radiator 3. The working principle of the vortex cooler 4 is based on the energy separation effect of high-speed rotating airflow. When the compressed air with a certain pressure enters the nozzle of the vortex tube, it will expand and accelerate, and enter a cylindrical vortex generator. In the vortex generator, the airflow enters the heat pipe along the wall of the heat pipe at an extremely high rotation speed. Due to the rotational motion, the airflow is divided into two streams: one is hot air with a higher temperature, and the other is cold air with a lower temperature. The hot air is discharged through the regulating valve, while the cold air forms ultra-low temperature cold air through the center of the vortex tube and is discharged from the other end. One end of the cold air is connected to the radiator 3 to take away excess heat. By adjusting the valve at the end of the heat pipe, the temperature and airflow of the cold air can be controlled. The vortex cooler 4 is respectively connected to the air compressor 5 and the radiator 3, so as to cool the compressed air introduced by the air compressor 5 and blow it toward the radiator 3, discharge the heat of the radiator 3 to the environment in time, take away the heat of the semiconductor refrigerator 2 more quickly, avoid the risk of explosion due to over-temperature, improve the reliability and stability of the device, and at the same time improve the cooling efficiency of the device.

[0046] In some embodiments, the laser-guided jet water cooling device further comprises a throttle valve 6, the two ends of which are respectively connected to the vortex cooler 4 and the air compressor 5, so as to adjust the flow rate of the compressed air entering the vortex cooler 4. The flow rate of the compressed air entering the vortex cooler 4 is adjusted by the regulating valve, so as to control the amount of cold air entering the radiator 3, thereby adjusting the cooling efficiency.

[0047] In some embodiments, the air outlet of the vortex cooler 4 is a small cylindrical air outlet, which may not provide a stable flow field for the radiator 3, resulting in insufficient heat exchange of the radiator 3. To solve the above problems, the laser-guided jet water cooling device also includes a connecting pipe 7, which is respectively connected to the cold air outlet of the vortex cooler 4 and the radiator 3, and is used to guide and rectify the compressed air. The cold air outlet of the vortex cooler 4 and the radiator 3 are respectively connected through the connecting pipe 7, which is used to guide and rectify the compressed air, so that the cold air blown out by the vortex cooler 4 can be evenly blown into the radiator 3, so that the radiator 3 can fully exchange heat with the semiconductor refrigerator 2, and the cooling effect is improved.

[0048] In some embodiments, the connecting pipe 7 includes a guide section 71 and a rectifying section 72; the guide section 71 is connected to the cold air outlet of the vortex cooler 4, and the inner wall of the guide section 71 is provided with a plurality of guide plates 711 parallel to the axial direction, and the guide plates 711 are in an inverted V shape; the inlet end of the rectifying section 72 is connected to the guide section 71, and the inlet end and the outlet end of the rectifying section 72 are provided with a plurality of rectifying holes 721 arranged relatively to each other. A plurality of guide plates 711 parallel to the axial direction of the guide section 71 are arranged through the inner wall of the guide section 71. The shape of the guide section 71 is a frustum, and the diameter of the outlet end is larger than that of the inlet end. The guide plate 711 is inverted V-shape. After the cold wind blows through the guide plate 711, a stable flow direction is formed without eddy currents, and the flow has a diffusion effect. The inlet end of the rectifying section 72 is connected with the guide section 71. The inlet and outlet ends of the rectifying section 72 are provided with a plurality of rectifying holes 721 arranged relatively to each other. After being guided, the cold wind enters from the rectifying holes 721 at the inlet end of the rectifying section 72, and then flows out from the rectifying holes 721 at the outlet end of the rectifying section 72 to enter the radiator 3, so that the cold wind blown into the radiator 3 by the vortex cooler 4 can be more uniform.

[0049] In some embodiments, the rectifying holes 721 are in a rhombus shape. A plurality of rhombus-shaped rectifying holes 721 are adjacent to each other and have the same spacing to form a grid shape, so that the airflow passing through the rectifying holes 721 is more uniform.

[0050] In some embodiments, the rectifying holes 721 are circular in shape. A plurality of circular rectifying holes 721 are spaced the same from each other, so that the airflow passing through the rectifying holes 721 is more uniform.

[0051] In some embodiments, the rectifying holes 721 are in a rectangular shape. A plurality of rectangular rectifying holes 721 are adjacent to each other and have the same spacing to form a grid shape, so that the airflow passing through the rectifying holes 721 is more uniform.

[0052] In some embodiments, the guide section 71 may be a truncated cone, the rectifying section 72 may be a cuboid, and the connecting pipe 7 further comprises a gradually expanding pipe 73, the two ends of which are respectively connected to the guide section 71 and the rectifying section 72 to form a smooth transition, and the diameter of the end of the gradually expanding pipe 73 connected to the guide section 71 is smaller than the diameter of the end connected to the rectifying section 72. By connecting the two ends of the gradually expanding pipe 73 to the guide section 71 and the rectifying section 72 respectively, the guide section 71 and the rectifying section 72 are prevented from being directly connected to form eddies at the corners, thereby improving the reliability and stability of the device.

[0053] In some embodiments, the radiator 3 is a plate-fin type radiator. The plate-fin type radiator has the following advantages: (1) high heat transfer efficiency, because the fins disturb the fluid and the boundary layer is constantly broken, so it has a large heat transfer coefficient; at the same time, because the partitions and fins are very thin and have high thermal conductivity, the plate-fin type radiator can achieve a very high efficiency; (2) compact, because the plate-fin type radiator has an extended secondary surface, so that its specific surface area can reach 1000m 2 / m 3 ; (3) Lightweight, because it is compact and mostly made of aluminum alloy. Now steel, copper, composite materials, etc. have also been mass-produced; (4) Strong adaptability. The plate-fin type radiator can be used for: heat exchange between gas-gas, gas-liquid, liquid-liquid, various fluids, and phase change heat exchange with collective state changes. Through the arrangement and combination of flow channels, it can adapt to: countercurrent, cross-current, multi-stream, multi-pass flow and other different heat exchange conditions. Through the combination of series, parallel, and series-parallel between units, it can meet the heat exchange needs of large equipment. Based on the above advantages of the plate-fin type radiator, the radiator 3 preferably adopts the plate-fin type radiator, which can make the cooling device structure more compact and lightweight, and the heat dissipation efficiency is higher.

[0054] In some embodiments, the radiator 3 is a CPU radiator. The CPU radiator in this patent refers to an air-cooled radiator 3. Compared with a plate-fin radiator, the CPU radiator is smaller in size, further reducing the volume of the cooling device.

[0055] The working principle of the laser-guided jet water cooling device is as follows: the semiconductor refrigerator 2 provides refrigerant to the microchannel heat exchanger 1, the microchannel heat exchanger 1 cools the water source through the refrigerant and then provides it to the water-light coupling head 200, the vortex cooler 4 is respectively connected to the air compressor 5 and the radiator 3, and is used to cool the compressed air introduced by the air compressor 5 and blow it to the radiator 3, discharge the heat of the radiator 3 to the environment in time, and take away the heat of the semiconductor refrigerator 2 more quickly. The cooling device can be made very small in size while ensuring the cooling effect, and the cooling device can be directly installed on the water-light coupling head 200, and move with the water-light coupling head 200. The cooling device is directly connected to the water-light coupling head 200, and the influence of the ambient temperature on the increase of the jet water temperature in the pipeline is reduced.

[0056] The second embodiment of the utility model provides a guiding laser system, combined with Figure 7 As shown, it includes a pressure reducing valve 100, a water-light coupling head 200 and the jet water cooling device 00 for guiding laser as described in the first aspect, wherein the pressure reducing valve 100 is connected to the water source and the water inlet 11 respectively, and the water-light coupling head 200 is connected to the water outlet 12.

[0057] In some embodiments, the guided laser system also includes a pure water machine 300, a pure water tank 400, a booster pump 500, an accumulator 600, a laser transmitter 700, a collimator 800 and a focuser 900. The pure water machine 300 receives tap water from the municipality, filters it to obtain pure water, and then provides it to the pure water tank 400 for storage. The booster pump 500 pressurizes the water, the accumulator 600 stores energy in the water, the pressure reducing valve 100 reduces the pressure of the pure water and provides it to the water inlet 11. After heat exchange and cooling to 4-10° in the microchannel heat exchanger 1, it is provided to the water optical coupling head 200. The laser generated by the laser transmitter 700 is collimated by the collimator 800 and focused by the focuser 900, and then emitted to the water optical coupling head 200 to couple with the pure water.

[0058] The guided laser system provided in this embodiment first pressurizes the pure water and then cools it, so as to avoid cooling first and then pressurizing it in a long conveying pipeline, which causes the water temperature to rise due to the ambient temperature, thereby affecting the coupling of water and laser. Moreover, the cooling device can be made very small in size and can be directly installed on the water-light coupling head 200, moving with the water-light coupling head 200. The cooling device is directly connected to the water-light coupling head 200, thereby reducing the effect of the ambient temperature on the increase in the temperature of the jet water in the pipeline.

[0059] 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, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A laser-guided water jet cooling device, characterized in that: It includes a microchannel heat exchanger, a semiconductor refrigerator and a radiator, wherein: The microchannel heat exchanger is provided with a water inlet for connecting to a water source and a water outlet for connecting to a water-light coupling head, and is used to cool the water source by a refrigerant; The cold end of the semiconductor refrigerator is connected to the microchannel heat exchanger to provide refrigerant to the microchannel heat exchanger; The radiator is connected to the hot end of the semiconductor refrigerator and is used to take away the heat of the semiconductor refrigerator.

2. The laser-guided water-jet cooling device according to claim 1, characterized in that: It also includes a vortex cooler and an air compressor. The vortex cooler is connected to the air compressor and the radiator respectively, and is used to separate the energy of the compressed air introduced by the air compressor to obtain hot air and cold air, and provide the cold air to the radiator.

3. The laser-guided water-jet cooling device according to claim 2, characterized in that: It also includes a throttle valve, with two ends of the throttle valve respectively connected to the vortex cooler and the air compressor to adjust the flow rate of compressed air entering the vortex cooler.

4. The laser-guided water-jet cooling device according to claim 2, characterized in that: It also includes a connecting pipe, which is respectively connected to the cold air outlet of the vortex cooler and the radiator, and is used to guide and rectify the compressed air.

5. The laser-guided water-jet cooling device according to claim 4, characterized in that: The connecting pipe includes a guide section and a rectifying section; the guide section is connected to the cold air outlet of the vortex cooler, the guide section has a truncated cone shape, and the outlet end has a larger diameter than the inlet end, the inner wall of the guide section is provided with a plurality of guide plates parallel to the axial direction, and the guide plates are in an inverted V shape; the inlet end of the rectifying section is connected to the guide section, and the inlet end and the outlet end of the rectifying section are provided with a plurality of rectifying holes arranged relatively.

6. The laser-guided water-jet cooling device according to claim 5, characterized in that: The shape of the rectifying hole is rhombus, circle and rectangle.

7. The laser-guided water-jet cooling device according to claim 5, characterized in that: The connecting pipe also includes a gradually expanding pipe, and two ends of the gradually expanding pipe are respectively connected to the guide section and the rectifying section.

8. The laser-guided water-jet cooling device according to claim 1, characterized in that: The radiator is a plate-fin type radiator.

9. The laser-guided water-jet cooling device according to claim 1, characterized in that: The radiator is a CPU radiator.

10. A guided laser system, characterized in that: It comprises a pressure reducing valve, a water-light coupling head and a jet water cooling device for guiding laser as described in any one of claims 1 to 9, wherein the pressure reducing valve is connected to a water source and the water inlet respectively, and the water-light coupling head is connected to the water outlet.

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