Temperature control device, system and method for liquid-cooled fiber laser

Abstract

The invention discloses a temperature control device, system and method for a liquid-cooled fiber laser. The device comprises a controller, a liquid path parameter monitoring element, a communication assembly and a reversing assembly. A water inlet and a water outlet of the liquid cooling fiber laser are respectively connected with a water inlet pipeline and a water outlet pipeline, and liquid path parameter monitoring elements for monitoring the temperature and / or flow of cooling liquid are arranged at the water inlet and the water outlet; the communicating assembly communicates with the water inlet pipeline and the water outlet pipeline. The reversing assemblies used for changing the flow direction of cooling liquid are arranged at the joint of the communicating assembly and the water inlet pipeline and the joint of the communicating assembly and the water outlet pipeline. The controller is electrically connected with the liquid path parameter monitoring element and the reversing assembly. According to the scheme, the cost is low, circulating water supply can be achieved on the basis that the current concentrated refrigeration pipeline layout is not broken, regulation and control over various temperatures higher than the concentrated refrigeration liquid temperature are achieved, and meanwhile hydraulic pressure and liquid flow do not need to be changed.

Description

Technical Field

[0001] The present invention relates to the technical field of liquid-cooled fiber lasers, and in particular to a temperature control device, system and method for liquid-cooled fiber lasers. Background Art

[0002] When a fiber laser is working, its internal optical devices need to be controlled at a suitable operating temperature, because a large amount of waste heat is generated when the laser is working. If the laser is not cooled in time, the output parameters may jump or even burn out.

[0003] Lasers usually need to be cooled by heat sinks or water-cooled plates. Low-power fiber lasers generally use air cooling for heat dissipation, while medium and high-power fiber lasers generally choose water cooling for heat dissipation. The cooling water temperature of fiber lasers currently on the market is generally required to be set at around 25°C. Inside the laser manufacturing plant, centralized refrigeration is usually arranged, and water is transported through pipes. However, the required water temperature varies for different process testing links, and additional water temperature modulation is required, such as temperature drift experiments, aging high-temperature tests, etc. The conventional implementation method is to add additional small and medium-sized chillers to modulate different temperatures. Although this can solve the problem, the additional chillers will take up the already limited equipment site space, and will also bring additional equipment and energy consumption burdens. Summary of the Invention

[0004] The present invention provides a temperature control device, system and method for a liquid-cooled fiber laser. The device has low cost and can circulate water without disrupting the current centralized refrigeration pipeline layout, thereby achieving multiple temperature controls higher than the centralized refrigeration liquid temperature without changing the hydraulic pressure and liquid flow rate.

[0005] In a first aspect, an embodiment of the present invention provides a temperature control device for a liquid-cooled fiber laser, comprising: a controller, a liquid path parameter monitoring element, a connecting component, and a reversing component;

[0006] The water inlet and water outlet of the liquid-cooled fiber laser are connected to the water inlet pipe and the water outlet pipe respectively, and the water inlet and the water outlet are both provided with liquid path parameter monitoring elements for monitoring the temperature and / or flow of the coolant; the connecting component is connected to the water inlet pipe and the water outlet pipe; the reversing component for changing the flow direction of the coolant is provided at the connection between the connecting component and the water inlet pipe and at the connection between the connecting component and the water outlet pipe;

[0007] The controller is electrically connected to the fluid path parameter monitoring element and the reversing component.

[0008] Optionally, the communication component includes a first communication pipe, a second communication pipe, a third communication pipe and a fourth communication pipe;

[0009] The first end of the first communicating pipe, the first end of the second communicating pipe, the first end of the third communicating pipe, and the first end of the fourth communicating pipe are all connected to the water inlet pipe, and the second end of the first communicating pipe, the second end of the second communicating pipe, the second end of the third communicating pipe, and the second end of the fourth communicating pipe are all connected to the water outlet pipe;

[0010] A first distance between the first end of the first communicating pipe and the water inlet is equal to a second distance between the second end of the second communicating pipe and the water outlet;

[0011] A third distance between the second end of the first communicating pipe and the water outlet is equal to a fourth distance between the first end of the second communicating pipe and the water inlet;

[0012] A fifth distance between the first end of the third communicating pipe and the water inlet is equal to a sixth distance between the second end of the fourth communicating pipe and the water outlet;

[0013] A seventh distance between the second end of the third communicating pipe and the water outlet is equal to an eighth distance between the first end of the fourth communicating pipe and the water inlet;

[0014] The first distance is smaller than the third distance, the third distance is smaller than the fifth distance, and the fifth distance is smaller than the seventh distance.

[0015] Optionally, the water inlet pipe is provided with a first water storage pipe, and the water outlet pipe is provided with a second water storage pipe;

[0016] The first water storage pipe is located between the first end of the second communicating pipe and the first end of the third communicating pipe;

[0017] The second water storage pipe is located between the second end of the first communicating pipe and the second end of the third communicating pipe.

[0018] Optionally, the first water storage pipe and the second water storage pipe both include multiple curved shapes.

[0019] Optionally, the reversing assembly includes a first three-way valve, a second three-way valve, a third three-way valve and a fourth three-way valve;

[0020] The first three-way valve and the third three-way valve are both arranged at the connection between the water inlet pipe and the connecting component;

[0021] The second three-way valve and the fourth three-way valve are both arranged at the connection between the water outlet pipe and the connecting component;

[0022] The ninth distance between the first three-way valve and the water inlet is equal to the tenth distance between the second three-way valve and the water outlet;

[0023] The eleventh distance between the third three-way valve and the water inlet is equal to the twelfth distance between the fourth three-way valve and the water outlet.

[0024] Optionally, the ninth distance is equal to the first distance, and the eleventh distance is equal to the fifth distance;

[0025] Or the ninth distance is equal to the first distance, and the eleventh distance is equal to the seventh distance;

[0026] Or the ninth distance is equal to the third distance, and the eleventh distance is equal to the fifth distance;

[0027] Alternatively, the ninth distance is equal to the third distance, and the eleventh distance is equal to the seventh distance.

[0028] In a second aspect, an embodiment of the present invention further provides a temperature control system for a liquid-cooled fiber laser, comprising the temperature control device for the liquid-cooled fiber laser and the liquid-cooled fiber laser according to the first aspect;

[0029] The first end of the water inlet pipe of the liquid-cooled fiber laser and the first end of the water outlet pipe of the liquid-cooled fiber laser are both connected to the centralized refrigeration pipe, the second end of the water inlet pipe is connected to the water inlet of the liquid-cooled fiber laser, and the second end of the water outlet pipe is connected to the water outlet of the liquid-cooled fiber laser.

[0030] In a third aspect, an embodiment of the present invention further provides a temperature control method for a liquid-cooled fiber laser, which is implemented using the temperature control device for the liquid-cooled fiber laser described in the first aspect. The temperature control method for the liquid-cooled fiber laser includes:

[0031] Acquiring the fluid circuit parameters monitored by the fluid circuit parameter monitoring element; the fluid circuit parameters include the temperature and / or flow rate of the coolant;

[0032] The state of the reversing component is controlled according to the fluid circuit parameters and the preset temperature value.

[0033] Optionally, controlling the state of the reversing component according to the fluid circuit parameters and the preset temperature value includes:

[0034] When it is determined according to the liquid circuit parameters that the temperature of the coolant is higher than a first preset temperature value, controlling the reversing component to be in a first state;

[0035] Among them, the first state is that the first end of the first three-way valve connected to the connecting component is closed, the first end of the second three-way valve connected to the connecting component is closed, the first end of the third three-way valve connected to the connecting component is closed, and the first end of the fourth three-way valve connected to the connecting component is closed.

[0036] Optionally, controlling the state of the reversing component according to the fluid circuit parameters and the preset temperature value includes:

[0037] When the temperature of the coolant is determined to be lower than a second preset temperature value according to the liquid circuit parameters, repeatedly controlling the reversing component to maintain the second state for a first preset time, and then controlling the reversing component to maintain the first state for a second preset time, until the temperature of the coolant reaches a third preset temperature value according to the liquid circuit parameters;

[0038] The second state is that the second end of the first three-way valve away from the water inlet is closed, the second end of the second three-way valve away from the water outlet is closed, the third end of the third three-way valve close to the water inlet is closed, and the third end of the fourth three-way valve close to the water outlet is closed;

[0039] The first preset temperature value is greater than the second preset temperature value, and the third preset temperature value is less than the first preset temperature value and greater than the second preset temperature value.

[0040] Embodiments of the present invention provide a temperature control device, system, and method for a liquid-cooled fiber laser. A connecting assembly is provided to connect a water inlet pipe and a water outlet pipe. A reversing assembly for changing the direction of coolant flow is disposed at the connection between the connecting assembly and the water inlet pipe, and at the connection between the connecting assembly and the water outlet pipe. A controller is used to control the state of the reversing assembly, thereby changing the direction of coolant flow. This device is low-cost and can circulate water without disrupting the current centralized cooling pipe layout, achieving multiple temperature control levels above the centralized cooling liquid temperature without changing hydraulic pressure or liquid flow.

[0041] It should be understood that the content described in this section is not intended to identify the key or important features of the embodiments of the present invention, nor is it intended to limit the scope of the present invention. Other features of the present invention will become readily understood through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0043] Figure 11 is a schematic structural diagram of a temperature control device for a liquid-cooled fiber laser provided by an embodiment of the present invention;

[0044] Figure 2 1 is a schematic structural diagram of another temperature control device for a liquid-cooled fiber laser provided by an embodiment of the present invention;

[0045] Figure 3 1 is a schematic structural diagram of another temperature control device for a liquid-cooled fiber laser provided by an embodiment of the present invention;

[0046] Figure 4 1 is a schematic structural diagram of another temperature control device for a liquid-cooled fiber laser provided by an embodiment of the present invention;

[0047] Figure 5 1 is a schematic structural diagram of another temperature control device for a liquid-cooled fiber laser provided by an embodiment of the present invention;

[0048] Figure 6 1 is a schematic structural diagram of another temperature control device for a liquid-cooled fiber laser provided by an embodiment of the present invention;

[0049] Figure 7 1 is a schematic structural diagram of another temperature control device for a liquid-cooled fiber laser provided by an embodiment of the present invention;

[0050] Figure 8 This is a predicted water temperature control curve provided by an embodiment of the present invention;

[0051] Figure 9 This is a water flow prediction curve provided by an embodiment of the present invention;

[0052] Figure 10 This is a flow chart of a temperature control method for a liquid-cooled fiber laser provided by an embodiment of the present invention;

[0053] Figure 11 This is a flow chart of another temperature control method for a liquid-cooled fiber laser provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0054] In order to enable those skilled in the art to better understand the solutions of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts should fall within the scope of protection of the present invention.

[0055] It should be noted that the terms "first", "second", etc. in the description and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that the numbers used in this way can be interchanged where appropriate so that the embodiments of the present invention described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions. For example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0056] Figure 1 This is a schematic diagram of the structure of a temperature control device for a liquid-cooled fiber laser provided by an embodiment of the present invention, with reference to Figure 1 The device includes: a controller (not shown in the drawings), a fluid path parameter monitoring element (not shown in the drawings), a connecting component 100, and a reversing component 200. The water inlet 310 and water outlet 320 of the liquid-cooled fiber laser 300 are connected to the water inlet pipe 330 and water outlet pipe 340, respectively. The water inlet 310 and water outlet 320 are each provided with a fluid path parameter monitoring element for monitoring the temperature and / or flow of the coolant. The connecting component 100 connects the water inlet pipe 330 and the water outlet pipe 340. The reversing component 200 for changing the flow direction of the coolant is provided at the connection between the connecting component 100 and the water inlet pipe 330 and at the connection between the connecting component 100 and the water outlet pipe 340. The controller is electrically connected to the fluid path parameter monitoring element and the reversing component 200.

[0057] It can be understood that, in each pipe in the schematic diagram of the temperature control device for the liquid-cooled fiber laser provided by the present invention, green indicates that the liquid in the pipe is a low-temperature liquid, orange indicates that the liquid in the pipe is a high-temperature liquid, and blue indicates that the liquid in the pipe is a non-circulating liquid.

[0058] It should be noted that the first end of the water inlet pipe 330 of the liquid-cooled fiber laser 300 and the first end of the water outlet pipe 340 of the liquid-cooled fiber laser 300 are both connected to the centralized refrigeration pipe, the second end of the water inlet pipe 330 is connected to the water inlet 310 of the liquid-cooled fiber laser 300, and the second end of the water outlet pipe 340 is connected to the water outlet 320 of the liquid-cooled fiber laser 300. The connecting component 100 connects the water inlet pipe 330 and the water outlet pipe 340. The reversing component 200 for changing the flow direction of the coolant is arranged at the connection between the connecting component 100 and the water inlet pipe 330 and at the connection between the connecting component 100 and the water outlet pipe 340. After the controller obtains the liquid path parameters monitored by the liquid path parameter monitoring element, it can change the flow direction of the coolant by controlling the state of the reversing component 200 according to the liquid path parameters and the preset temperature value. The cryogenic liquid entering the liquid-cooled fiber laser 300 from the water inlet 310 is heated by the liquid-cooled fiber laser 300, mixed with the newly injected cryogenic liquid, and then enters the liquid-cooled fiber laser 300 from the water inlet 310 again. After multiple mixing, the temperature of the liquid flowing through the liquid-cooled fiber laser 300 can reach a preset temperature. The liquid circuit parameters include the temperature and / or flow rate of the coolant. The controller can be a host computer or a PLC decision module.

[0059] In this embodiment of the present invention, a connecting assembly 100 is provided to connect the water inlet pipe 330 and the water outlet pipe 340. A reversing assembly 200 for changing the direction of coolant flow is located at the connection between the connecting assembly 100 and the water inlet pipe 330 and at the connection between the connecting assembly 100 and the water outlet pipe 340. A controller is used to control the state of the reversing assembly 200 to change the direction of coolant flow. This system is cost-effective and can circulate water without disrupting the existing centralized cooling pipe layout, achieving multiple temperature control levels above the centralized cooling liquid temperature without changing hydraulic pressure or liquid flow.

[0060] Figure 2 1 is a schematic structural diagram of another temperature control device for a liquid-cooled fiber laser provided by an embodiment of the present invention. Figure 3 1 is a schematic structural diagram of another temperature control device for a liquid-cooled fiber laser provided by an embodiment of the present invention. Figure 4 This is a schematic diagram of the structure of another temperature control device for a liquid-cooled fiber laser provided by an embodiment of the present invention. Optionally, based on the above embodiment, reference is made to Figures 1 to 4, the connecting component 100 includes a first connecting pipe 110, a second connecting pipe 120, a third connecting pipe 130 and a fourth connecting pipe 140; the first end of the first connecting pipe 110, the first end of the second connecting pipe 120, the first end of the third connecting pipe 130 and the first end of the fourth connecting pipe 140 are all connected to the water inlet pipe 330, and the second end of the first connecting pipe 110, the second end of the second connecting pipe 120, the second end of the third connecting pipe 130 and the second end of the fourth connecting pipe 140 are all connected to the water outlet pipe 340; the first end of the first connecting pipe 110 is at a first distance from the water inlet 310, and the second connecting pipe 120 is at a first distance from the water inlet 310. 0 is equal to the second distance between the second end of the first communicating pipe 110 and the water outlet 320; the third distance between the second end of the first communicating pipe 110 and the water outlet 320 is equal to the fourth distance between the first end of the second communicating pipe 120 and the water inlet 310; the fifth distance between the first end of the third communicating pipe 130 and the water inlet 310 is equal to the sixth distance between the second end of the fourth communicating pipe 140 and the water outlet 320; the seventh distance between the second end of the third communicating pipe 130 and the water outlet 320 is equal to the eighth distance between the first end of the fourth communicating pipe 140 and the water inlet 310; wherein, the first distance is smaller than the third distance, the third distance is smaller than the fifth distance, and the fifth distance is smaller than the seventh distance.

[0061] It is understandable that the embodiment of the present invention is configured in this way to change the flow direction of the coolant by controlling the state of the reversing component 200, so that the low-temperature liquid entering the liquid-cooled fiber laser 300 from the water inlet 310 is heated by the liquid-cooled fiber laser 300, and then mixed with the newly injected low-temperature liquid and enters the liquid-cooled fiber laser 300 again from the water inlet 310. After multiple mixing, the temperature of the liquid flowing through the liquid-cooled fiber laser 300 can reach a preset temperature.

[0062] Specifically, refer to Figure 1 and Figure 4 ,exist Figure 1 and Figure 4 In the state shown, the first end of the first three-way valve 210 connected to the connecting component 100 is closed, the first end of the second three-way valve 220 connected to the connecting component 100 is closed, the first end of the third three-way valve 230 connected to the connecting component 100 is closed, and the first end of the fourth three-way valve 240 connected to the connecting component 100 is closed. Figure 2 and Figure 3 ,exist Figure 2 and Figure 3 In this state, the second end of the first three-way valve 210 away from the water inlet 310 is closed, the second end of the second three-way valve 220 away from the water outlet 320 is closed, the third end of the third three-way valve 230 close to the water inlet 310 is closed, and the third end of the fourth three-way valve 240 close to the water outlet 320 is closed. Figure 1, when the state of the reversing component 200 is as follows Figure 1 As shown, the constant temperature low temperature liquid provided by the centralized refrigeration pipeline is directly used to dissipate heat for the liquid-cooled fiber laser 300. When the state of the reversing component 200 is as shown Figure 2 As shown, the low-temperature liquid starts to flow from the fourth connecting pipe 140 to the water outlet pipe 340, continuously pushing the high-temperature liquid in the water outlet pipe 340 into the water inlet 310. At the same time, the high-temperature liquid heated inside the liquid-cooled fiber laser 300 is continuously pushed into the water inlet pipe 330 through the water outlet 320. Figure 3 for Figure 2 A state after completion, Figure 4 This is a state after the reversing assembly 200 is reversed again. At this time, the low-temperature liquid in the pipe pushes the high-temperature liquid in the water inlet pipe 330 into the water inlet 310 to achieve secondary heating. At the same time, the high-temperature liquid heated inside the liquid-cooled fiber laser 300 is continuously pushed into the water outlet pipe 340 through the water outlet 320. The controller obtains the temperature and / or flow of the coolant, or through time feedback, and Figure 2 、 Figure 3 、 Figure 4 The state of the loop can maintain the liquid temperature to rise slowly. Figure 1 By combining heating and cooling operations, various temperature controls can be achieved that are higher than the water temperature in the centralized cooling pipes without changing the water pressure and water flow conditions.

[0063] Optionally, based on the above embodiment, continue to refer to Figures 1 to 4 The water inlet pipe 330 is provided with a first water storage pipe 331, and the water outlet pipe 340 is provided with a second water storage pipe 341; the first water storage pipe 331 is located between the first end of the second connecting pipe 120 and the first end of the third connecting pipe 130; the second water storage pipe 341 is located between the second end of the first connecting pipe 110 and the second end of the third connecting pipe 130.

[0064] It is understandable that the water inlet pipe 330 is provided with a first water storage pipe 331, and the water outlet pipe 340 is provided with a second water storage pipe 341 to store the heated liquid, which is conducive to quickly raising the liquid temperature to a preset temperature.

[0065] Optionally, based on the above embodiment, the first water storage pipe 331 and the second water storage pipe 341 both include multiple curved shapes.

[0066] Specifically, the first water storage pipe 331 and the second water storage pipe 341 can be bow-shaped water storage pipes, or other water storage pipes with a curved shape, as long as they can store water.

[0067] Figure 51 is a schematic structural diagram of another temperature control device for a liquid-cooled fiber laser provided by an embodiment of the present invention. Figure 6 1 is a schematic structural diagram of another temperature control device for a liquid-cooled fiber laser provided by an embodiment of the present invention. Figure 7 Schematic diagram of the structure of another temperature control device for liquid-cooled fiber laser provided by an embodiment of the present invention. Figures 1 to 7 The reversing assembly 200 includes a first three-way valve 210, a second three-way valve 220, a third three-way valve 230 and a fourth three-way valve 240; the first three-way valve 210 and the third three-way valve 230 are both arranged at the connection between the water inlet pipe 330 and the connecting assembly 100; the second three-way valve 220 and the fourth three-way valve 240 are both arranged at the connection between the water outlet pipe 340 and the connecting assembly 100; the ninth distance between the first three-way valve 210 and the water inlet 310 is equal to the tenth distance between the second three-way valve 220 and the water outlet 320; the eleventh distance between the third three-way valve 230 and the water inlet 310 is equal to the twelfth distance between the fourth three-way valve 240 and the water outlet 320.

[0068] Among them, the first three-way valve 210, the second three-way valve 220, the third three-way valve 230 and the fourth three-way valve 240 are all solenoid valves, and the states of the first three-way valve 210, the second three-way valve 220, the third three-way valve 230 and the fourth three-way valve 240 can be controlled by the controller.

[0069] Optionally, based on the above embodiment, in one embodiment, reference Figure 5 , the ninth distance is equal to the first distance, and the eleventh distance is equal to the fifth distance. Or in one embodiment, reference Figures 1 to 4 , the ninth distance is equal to the first distance, and the eleventh distance is equal to the seventh distance. Or in one embodiment, reference Figure 6 , the ninth distance is equal to the third distance, and the eleventh distance is equal to the fifth distance. Or in one embodiment, reference Figure 7 , the ninth distance is equal to the third distance, and the eleventh distance is equal to the seventh distance.

[0070] It is understandable that in Figure 5 In the corresponding embodiment, the first three-way valve 210 is connected to the first end of the first communicating pipe 110, the second three-way valve 220 is connected to the second end of the second communicating pipe 120, the third three-way valve 230 is connected to the first end of the third communicating pipe 130, and the fourth three-way valve 240 is connected to the second end of the fourth communicating pipe 140. Figures 1 to 4In the corresponding embodiment, the first three-way valve 210 is connected to the first end of the first communicating pipe 110, the second three-way valve 220 is connected to the second end of the second communicating pipe 120, the third three-way valve 230 is connected to the first end of the fourth communicating pipe 140, and the fourth three-way valve 240 is connected to the second end of the third communicating pipe 130. Figure 6 In the corresponding embodiment, the first three-way valve 210 is connected to the first end of the second communicating pipe 120, the second three-way valve 220 is connected to the second end of the first communicating pipe 110, the third three-way valve 230 is connected to the first end of the third communicating pipe 130, and the fourth three-way valve 240 is connected to the second end of the fourth communicating pipe 140. Figure 7 In the corresponding embodiment, the first three-way valve 210 is connected to the first end of the second connecting pipe 120, the second three-way valve 220 is connected to the second end of the first connecting pipe 110, the third three-way valve 230 is connected to the first end of the fourth connecting pipe 140, and the fourth three-way valve 240 is connected to the second end of the third connecting pipe 130.

[0071] Figure 8 This is a predicted water temperature control curve provided by an embodiment of the present invention, specifically a water temperature control curve for control by a temperature control device for a liquid-cooled fiber laser according to an embodiment of the present invention. Figure 9 This is a water flow prediction curve provided by an embodiment of the present invention, specifically a water flow prediction curve controlled by the temperature control device of the liquid-cooled fiber laser according to an embodiment of the present invention. Figure 8 and Figure 9 The embodiment of the present invention can stably control and implement various temperature controls that are higher than the water temperature of the centralized refrigeration pipeline without changing the water pressure and water flow conditions.

[0072] In summary, the embodiment of the present invention provides a connecting assembly 100 to connect the water inlet pipe 330 and the water outlet pipe 340. A reversing assembly 200 for changing the coolant flow direction is disposed at the connection between the connecting assembly 100 and the water inlet pipe 330 and at the connection between the connecting assembly 100 and the water outlet pipe 340. A controller is used to control the state of the reversing assembly 200 to change the coolant flow direction. This is a low-cost system that can circulate water without disrupting the existing centralized cooling pipe layout, achieving multiple temperature control levels above the centralized cooling liquid temperature without changing the hydraulic pressure or liquid flow rate.

[0073] An embodiment of the present invention further provides a temperature control system for a liquid-cooled fiber laser, comprising the temperature control device for a liquid-cooled fiber laser provided in any of the above embodiments and a liquid-cooled fiber laser 300 .

[0074] Continue to refer Figures 1 to 7The first end of the water inlet pipe 330 of the liquid-cooled fiber laser 300 and the first end of the water outlet pipe 340 of the liquid-cooled fiber laser 300 are both connected to the centralized refrigeration pipe (not shown in the drawings), the second end of the water inlet pipe 330 is connected to the water inlet 310 of the liquid-cooled fiber laser 300, and the second end of the water outlet pipe 340 is connected to the water outlet 320 of the liquid-cooled fiber laser 300.

[0075] Figure 10 : This is a flow chart of a temperature control method for a liquid-cooled fiber laser provided by an embodiment of the present invention. The temperature control method for a liquid-cooled fiber laser is implemented using the temperature control device for the liquid-cooled fiber laser provided by the above embodiment. The temperature control method for a liquid-cooled fiber laser includes:

[0076] S1010. Acquire the fluid circuit parameters monitored by the fluid circuit parameter monitoring element; the fluid circuit parameters include the temperature and / or flow rate of the coolant.

[0077] S1020: Control the state of the reversing component according to the fluid path parameters and the preset temperature value.

[0078] Specifically, after the controller obtains the liquid path parameters monitored by the liquid path parameter monitoring element, it controls the state of the reversing component according to the liquid path parameters and the preset temperature value, thereby changing the flow direction of the coolant. This allows the cryogenic liquid entering the liquid-cooled fiber laser from the water inlet to be heated by the liquid-cooled fiber laser, then mixed with the newly injected cryogenic liquid and enter the liquid-cooled fiber laser again from the water inlet. After multiple mixings, the temperature of the liquid flowing through the liquid-cooled fiber laser can reach the preset temperature.

[0079] It can be understood that by obtaining the liquid circuit parameters monitored by the liquid circuit parameter monitoring element through the controller, analyzing and deciding the timing and frequency of regulating the reversing of the reversing component, it is possible to stably control and achieve various temperature controls higher than the water temperature of the centralized refrigeration pipeline without changing the water pressure and water flow conditions.

[0080] Figure 11 This is a flow chart of another temperature control method for a liquid-cooled fiber laser provided by an embodiment of the present invention, with reference to Figure 11 , the method comprises the following steps:

[0081] S1110. Acquire the liquid circuit parameters monitored by the liquid circuit parameter monitoring element; the liquid circuit parameters include the temperature and / or flow rate of the coolant.

[0082] S1120. When it is determined according to the liquid circuit parameters that the temperature of the coolant is higher than a first preset temperature value, the reversing component is controlled to be in a first state.

[0083] Among them, the first state is that the first end of the first three-way valve connected to the connecting component is closed, the first end of the second three-way valve connected to the connecting component is closed, the first end of the third three-way valve connected to the connecting component is closed, and the first end of the fourth three-way valve connected to the connecting component is closed.

[0084] For example, Figure 1 and Figure 4 The reversing assembly in is in the first state, at this time, the first end of the first three-way valve 210 connected to the connecting assembly 100 is closed, the first end of the second three-way valve 220 connected to the connecting assembly 100 is closed, the first end of the third three-way valve 230 connected to the connecting assembly 100 is closed, and the first end of the fourth three-way valve 240 connected to the connecting assembly 100 is closed.

[0085] It should be noted that the first preset temperature value can be freely set by the user. When the temperature of the coolant is determined to be higher than the first preset temperature value according to the liquid circuit parameters, continue to refer to Figure 1 The controller controls the reversing component to be in the first state. The constant temperature and low temperature liquid provided by the centralized refrigeration pipeline flows directly from the water inlet pipeline into the water inlet to dissipate heat for the liquid-cooled fiber laser, and then flows directly out from the water outlet and the water outlet pipeline. At this time, the constant temperature and low temperature liquid provided by the centralized refrigeration pipeline is directly used to dissipate heat for the liquid-cooled fiber laser.

[0086] Optionally, based on the above embodiment, step S1020 may include step S1120.

[0087] S1130. When the temperature of the coolant is determined to be lower than the second preset temperature value according to the liquid circuit parameters, repeatedly control the reversing component to maintain the second state for the first preset time, and then control the reversing component to maintain the first state for the second preset time, until the temperature of the coolant reaches the third preset temperature value according to the liquid circuit parameters.

[0088] Among them, the second state is that the second end of the first three-way valve away from the water inlet is closed, the second end of the second three-way valve away from the water outlet is closed, the third end of the third three-way valve close to the water inlet is closed, and the third end of the fourth three-way valve close to the water outlet is closed; the first preset temperature value is greater than the second preset temperature value, the third preset temperature value is less than the first preset temperature value, and greater than the second preset temperature value.

[0089] For example, in Figure 2 and Figure 3 In this state, the second end of the first three-way valve 210 away from the water inlet 310 is closed, the second end of the second three-way valve 220 away from the water outlet 320 is closed, the third end of the third three-way valve 230 close to the water inlet 310 is closed, and the third end of the fourth three-way valve 240 close to the water outlet 320 is closed.

[0090] It should be noted that the second preset temperature value and the third preset temperature value can be freely set by the user, as long as the first preset temperature value is greater than the second preset temperature value, the third preset temperature value is less than the first preset temperature value, and greater than the second preset temperature value. The first preset time and the second preset time can be the time selected in advance after multiple tests, or can be the time calculated by the controller by obtaining the temperature and / or flow of the coolant. When the state of the reversing component 200 is as follows Figure 2 As shown, the low-temperature liquid starts to flow from the fourth connecting pipe 140 to the water outlet pipe 340, continuously pushing the high-temperature liquid in the water outlet pipe 340 into the water inlet 310. At the same time, the high-temperature liquid heated inside the liquid-cooled fiber laser 300 is continuously pushed into the water inlet pipe 330 through the water outlet 320. Figure 3 for Figure 2 A state after completion, Figure 4 This is a state after the reversing assembly 200 is reversed again. At this time, the low-temperature liquid in the pipe pushes the high-temperature liquid in the water inlet pipe 330 into the water inlet 310 to achieve secondary heating. At the same time, the high-temperature liquid heated inside the liquid-cooled fiber laser 300 is continuously pushed into the water outlet pipe 340 through the water outlet 320. The controller obtains the temperature and / or flow of the coolant, or through time feedback, and Figure 2 、 Figure 3 、 Figure 4 The state of the loop can maintain the liquid temperature to rise slowly. Figure 1 By combining heating and cooling operations, various temperature controls can be achieved that are higher than the water temperature in the centralized cooling pipes without changing the water pressure and water flow conditions.

[0091] Optionally, based on the above embodiment, step S1020 may include step S1130.

[0092] The temperature control method for a liquid-cooled fiber laser provided in an embodiment of the present invention is implemented by using the temperature control device for a liquid-cooled fiber laser provided in the above embodiment, and therefore has the same beneficial effects. For matters not described in detail in the embodiment of the present invention, reference may be made to the temperature control device for a liquid-cooled fiber laser provided in the above embodiment.

[0093] The above specific embodiments do not limit the scope of protection of the present invention. Those skilled in the art will appreciate that various modifications, combinations, sub-combinations, and substitutions may be made based on design requirements and other factors. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention are intended to be included within the scope of protection of the present invention.

Claims

1. A temperature control device for a liquid-cooled fiber laser, characterized in that: include: Controller, fluid path parameter monitoring element, connecting component and reversing component; The water inlet and water outlet of the liquid-cooled fiber laser are connected to the water inlet pipe and the water outlet pipe respectively, and the water inlet and the water outlet are both provided with liquid path parameter monitoring elements for monitoring the temperature and / or flow of the coolant; the connecting component is connected to the water inlet pipe and the water outlet pipe; the reversing component for changing the flow direction of the coolant is provided at the connection between the connecting component and the water inlet pipe and at the connection between the connecting component and the water outlet pipe; The controller is electrically connected to the fluid path parameter monitoring element and the reversing component.

2. The temperature control device for liquid-cooled fiber laser according to claim 1, characterized in that: The communication component includes a first communication pipe, a second communication pipe, a third communication pipe and a fourth communication pipe; The first end of the first communicating pipe, the first end of the second communicating pipe, the first end of the third communicating pipe, and the first end of the fourth communicating pipe are all connected to the water inlet pipe, and the second end of the first communicating pipe, the second end of the second communicating pipe, the second end of the third communicating pipe, and the second end of the fourth communicating pipe are all connected to the water outlet pipe; A first distance between the first end of the first communicating pipe and the water inlet is equal to a second distance between the second end of the second communicating pipe and the water outlet; A third distance between the second end of the first communicating pipe and the water outlet is equal to a fourth distance between the first end of the second communicating pipe and the water inlet; A fifth distance between the first end of the third communicating pipe and the water inlet is equal to a sixth distance between the second end of the fourth communicating pipe and the water outlet; A seventh distance between the second end of the third communicating pipe and the water outlet is equal to an eighth distance between the first end of the fourth communicating pipe and the water inlet; The first distance is smaller than the third distance, the third distance is smaller than the fifth distance, and the fifth distance is smaller than the seventh distance.

3. The temperature control device for liquid-cooled fiber laser according to claim 2, characterized in that: The water inlet pipe is provided with a first water storage pipe, and the water outlet pipe is provided with a second water storage pipe; The first water storage pipe is located between the first end of the second communicating pipe and the first end of the third communicating pipe; The second water storage pipe is located between the second end of the first communicating pipe and the second end of the third communicating pipe.

4. The temperature control device for liquid-cooled fiber laser according to claim 3, characterized in that: The first water storage pipe and the second water storage pipe each include a plurality of bends.

5. The temperature control device for liquid-cooled fiber laser according to claim 2, characterized in that: The reversing assembly includes a first three-way valve, a second three-way valve, a third three-way valve and a fourth three-way valve; The first three-way valve and the third three-way valve are both arranged at the connection between the water inlet pipe and the connecting component; The second three-way valve and the fourth three-way valve are both arranged at the connection between the water outlet pipe and the connecting component; The ninth distance between the first three-way valve and the water inlet is equal to the tenth distance between the second three-way valve and the water outlet; The eleventh distance between the third three-way valve and the water inlet is equal to the twelfth distance between the fourth three-way valve and the water outlet.

6. The temperature control device for liquid-cooled fiber laser according to claim 5, characterized in that: The ninth distance is equal to the first distance, and the eleventh distance is equal to the fifth distance; Or the ninth distance is equal to the first distance, and the eleventh distance is equal to the seventh distance; Or the ninth distance is equal to the third distance, and the eleventh distance is equal to the fifth distance; Alternatively, the ninth distance is equal to the third distance, and the eleventh distance is equal to the seventh distance.

7. A temperature control system for a liquid-cooled fiber laser, characterized in that: A temperature control device for a liquid-cooled fiber laser and a liquid-cooled fiber laser according to any one of claims 1 to 6; The first end of the water inlet pipe of the liquid-cooled fiber laser and the first end of the water outlet pipe of the liquid-cooled fiber laser are both connected to the centralized refrigeration pipe, the second end of the water inlet pipe is connected to the water inlet of the liquid-cooled fiber laser, and the second end of the water outlet pipe is connected to the water outlet of the liquid-cooled fiber laser.

8. A temperature control method for a liquid-cooled fiber laser, characterized in that: The temperature control device of the liquid-cooled fiber laser according to any one of claims 1 to 6 is used to implement the temperature control method of the liquid-cooled fiber laser, comprising: Acquiring the fluid circuit parameters monitored by the fluid circuit parameter monitoring element; the fluid circuit parameters include the temperature and / or flow rate of the coolant; The state of the reversing component is controlled according to the fluid circuit parameters and the preset temperature value.

9. The temperature control method for a liquid-cooled fiber laser according to claim 8, characterized in that: Controlling the state of the reversing component according to the fluid circuit parameters and the preset temperature value includes: When it is determined according to the liquid circuit parameters that the temperature of the coolant is higher than a first preset temperature value, controlling the reversing component to be in a first state; Among them, the first state is that the first end of the first three-way valve connected to the connecting component is closed, the first end of the second three-way valve connected to the connecting component is closed, the first end of the third three-way valve connected to the connecting component is closed, and the first end of the fourth three-way valve connected to the connecting component is closed.

10. The temperature control method for a liquid-cooled fiber laser according to claim 8, characterized in that: Controlling the state of the reversing component according to the fluid circuit parameters and the preset temperature value includes: When the temperature of the coolant is determined to be lower than a second preset temperature value according to the liquid circuit parameters, repeatedly controlling the reversing component to maintain the second state for a first preset time, and then controlling the reversing component to maintain the first state for a second preset time, until the temperature of the coolant reaches a third preset temperature value according to the liquid circuit parameters; The second state is that the second end of the first three-way valve away from the water inlet is closed, the second end of the second three-way valve away from the water outlet is closed, the third end of the third three-way valve close to the water inlet is closed, and the third end of the fourth three-way valve close to the water outlet is closed; The first preset temperature value is greater than the second preset temperature value, and the third preset temperature value is less than the first preset temperature value and greater than the second preset temperature value.

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