Control method of laser heat dissipation device and laser system

Abstract

The invention relates to the technical field of laser system control, in particular to a control method of a laser heat dissipation device and a laser system. The control method of the laser heat dissipation device comprises the following steps that the initial temperature of a plurality of pumping sources in a laser system is obtained, and the liquid flow of the heat dissipation device is controlled according to the difference between the initial temperature and the preset temperature; obtaining current temperature signals of a plurality of pumping sources in the laser system, and generating a flow regulation signal of refrigerant fluid of the heat dissipation device based on a current difference value between the highest temperature and the lowest temperature in the plurality of current temperature signals; and controlling the liquid flow of the heat dissipation device based on the flow regulation signal. In the control method of the embodiment, the temperature of the plurality of pumping sources and the temperature difference among the plurality of pumping sources can be accurately controlled to adjust the liquid flow of the laser heat dissipation device, so that the stability of the laser system is improved to ensure the stable light emission, and meanwhile, the laser heat dissipation device has a compact structure, and the manufacturing cost is also reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of laser system control, and in particular to a control method for a laser heat dissipation device and a laser system. Background Art

[0002] High-power laser systems require the laser to maintain a stable laser light output state during the cutting or welding process to ensure working stability and product quality. The laser system meets this requirement by ensuring that the laser operates at a preset temperature.

[0003] In order to ensure the temperature stability of the laser pump, lasers currently on the market usually increase the flow rate of the water cooling plate to meet the temperature control requirements, which leads to oversized specifications of the laser heat dissipation device and increased manufacturing costs. However, despite this, the large temperature difference between the multiple pump sources of the laser cannot be effectively improved.

[0004] Therefore, it is necessary to make improvements to the above problems in order to change the current situation. Summary of the invention

[0005] The present invention provides a control method for a laser heat dissipation device and a laser system, which are used to solve the problem that the laser system in the prior art usually improves the heat dissipation effect by increasing the size of a water cooling plate, which leads to an overly large specification of the laser heat dissipation device and an increased manufacturing cost, and at the same time, the temperature difference between multiple pump sources of the laser is too large and cannot be effectively improved.

[0006] The present invention provides a control method for a laser heat dissipation device, the control method comprising the following steps:

[0007] Acquiring initial temperatures of a plurality of pump sources in the laser system, and controlling a liquid flow rate of a heat sink according to a difference between the initial temperature and a preset temperature;

[0008] Acquire current temperature signals of multiple pump sources in the laser system, and generate a flow rate adjustment signal of a refrigerant of a heat sink based on a current difference between a highest temperature and a lowest temperature in the multiple current temperature signals;

[0009] The liquid flow of the heat dissipation device is controlled based on the flow adjustment signal.

[0010] According to one embodiment of the present invention, the step of acquiring current temperature signals of multiple pump sources in the laser system and generating a flow rate adjustment signal of the refrigerant of the heat sink based on the current difference between the highest temperature and the lowest temperature in the multiple current temperature signals comprises the following steps:

[0011] separately calculating a current difference between a highest temperature and a lowest temperature among the plurality of initial temperatures;

[0012] Determine the difference between the current difference and the preset difference;

[0013] When the current difference is greater than the preset difference, a flow rate adjustment signal of the refrigerant liquid of the heat dissipation device is generated to reduce the difference.

[0014] According to an embodiment of the present invention, the preset difference is 0°C-5°C.

[0015] According to an embodiment of the present invention, when the current difference is greater than the preset difference, the step of generating a flow adjustment signal of the refrigerant liquid of the heat dissipation device to reduce the difference comprises the following steps:

[0016] When the current difference is greater than the preset difference, a flow rate adjustment signal for increasing the flow rate of the refrigerant in the heat dissipation device is generated;

[0017] The heat dissipation device receives the flow adjustment signal and increases the liquid flow of the heat dissipation device to reduce the difference value.

[0018] According to one embodiment of the present invention, the step of acquiring current temperature signals of multiple pump sources in the laser system and generating a flow rate adjustment signal of the refrigerant of the heat sink based on the current difference between the highest temperature and the lowest temperature in the multiple current temperature signals comprises the following steps:

[0019] When the current difference is less than the preset difference, a flow rate adjustment signal of the refrigerant liquid of the heat dissipation device is generated to reduce or maintain the same flow rate;

[0020] The heat sink receives the flow adjustment signal and reduces or maintains the same liquid flow of the heat sink to reduce the difference value.

[0021] According to one embodiment of the present invention, the step of controlling the liquid flow rate of the heat dissipation device comprises the following steps:

[0022] Sending the temperature signal to a PID module, and generating a corresponding PID control strategy according to the difference between the initial temperature and the preset temperature;

[0023] The liquid flow of the heat sink is controlled according to the PID control strategy.

[0024] According to one embodiment of the present invention, the PID control module is used to send a corresponding liquid adjustment signal to the heat dissipation device according to the difference between the initial temperature and the preset temperature, so as to control the opening and closing of the liquid pump of the heat dissipation device.

[0025] According to an embodiment of the present invention, the preset temperature is 60°C-70°C.

[0026] The present invention also provides a laser system, comprising:

[0027] A laser processing device is provided with a plurality of pump sources;

[0028] A heat dissipation device, comprising a water cooling plate and a liquid pump, wherein the water cooling plate is respectively connected to the liquid pump and the pump source and is used to dissipate heat from the pump source; and

[0029] A control module is signal-connected to the laser heat dissipation device; the control module includes a memory and a processor, the memory stores a computer program, and when the processor executes the computer program, the steps of any one of the methods described above are implemented.

[0030] Implementing the control method of the embodiment of the present invention has the following beneficial effects:

[0031] In the control method of the present embodiment, by outputting an adjustment signal according to the temperature difference between the multiple pump sources, the temperature of the multiple pump sources and the temperature difference between the multiple pump sources can be accurately controlled to adjust the liquid flow of the laser heat dissipation device. Compared with the traditional laser system which only controls the temperature of the pump source without considering the influence of the temperature difference, the water flow provided by the water chiller can be reduced to reduce waste. At the same time, there is no need to increase the volume of the laser heat dissipation device, and the heat dissipation performance of the heat dissipation device itself can be fully utilized to prevent system damage caused by temperature overshoot of the pump body, thereby improving the stability of the laser system to ensure stable light output. At the same time, the laser heat dissipation device can have a compact structure and the manufacturing cost can be reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] In order to more clearly illustrate the embodiments of the present invention 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 present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0033] in:

[0034] Figure 1 is a flow chart of a control method of a laser heat dissipation device in an embodiment of the present invention;

[0035] Figure 2 is a flow chart of a control method of a laser heat dissipation device in an embodiment of the present invention;

[0036] Figure 3 is a flow chart of a control method of a laser heat dissipation device in an embodiment of the present invention;

[0037] Figure 4 Schematic diagram of the laser system in the embodiment of the present invention. DETAILED DESCRIPTION

[0038] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with the drawings of the present invention. Obviously, the described embodiments are 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 creative work are within the scope of protection of the present invention.

[0039] See also Figures 1 to 3 As shown, an embodiment of the present invention provides a control method for a laser heat dissipation device, which includes the following steps:

[0040] Step S100, obtaining the initial temperatures of the plurality of pump sources 21 in the laser system 1, and controlling the liquid flow of the heat sink 10 according to the difference between the initial temperature and the preset temperature; in this control cycle, the initial temperature can be regarded as the initial temperature signal in this cycle, and when the next cycle is performed, the initial temperature signal can be used for comparison with the latest acquired initial temperature;

[0041] Step S200, obtaining current temperature signals of multiple pump sources 21 in the laser system 1, and generating a flow rate adjustment signal of the refrigerant of the heat dissipation device 10 based on the difference between the multiple current temperature signals and the preset temperature;

[0042] Step S300: controlling the liquid flow of the heat dissipation device 10 based on the flow adjustment signal.

[0043] In the control method of the present embodiment, by outputting an adjustment signal according to the temperature difference between the multiple pump sources 21, the temperature of the multiple pump sources 21 and the temperature difference between the multiple pump sources 21 can be accurately controlled to adjust the liquid flow of the laser heat dissipation device 10. Compared with the traditional laser system 1 which only controls the temperature of the pump source 21 without considering the influence of the temperature difference, the water flow provided by the water chiller can be reduced to reduce waste. At the same time, there is no need to increase the volume of the laser heat dissipation device 10, and the heat dissipation performance of the heat dissipation device 10 itself can be fully utilized to prevent system damage caused by temperature overshoot of the pump body, thereby improving the stability of the laser system 1 to ensure stable light output. At the same time, the laser heat dissipation device 10 can have a compact structure and the manufacturing cost can be reduced.

[0044] Further, step S200 includes the following steps:

[0045] Step S210, individually calculating the current difference between the highest temperature and the lowest temperature in a plurality of current temperature signals;

[0046] Step S220, determining the difference between the current difference and the preset difference;

[0047] Step S230: When the current difference is greater than the preset difference, a flow rate adjustment signal of the refrigerant of the heat dissipation device 10 is generated to reduce the difference.

[0048] In this step, the liquid flow of the heat sink 10 is adjusted according to the difference between the current difference between the highest temperature and the lowest temperature and the preset difference. Such adjustment can avoid a situation where the temperature difference between the multiple pump sources 21 is too large. When the temperature difference is too large, it will affect the overall heat dissipation effect of the heat sink 10. By adjusting so that the temperature difference between the multiple pump sources 21 is maintained within the preset difference, the heat dissipation performance of the heat sink 10 can be fully utilized.

[0049] Specifically, the preset difference is 0°C-5°C.

[0050] In some embodiments, the preset difference can be customized according to the heat dissipation requirements of the heat dissipation device 10. In a preferred embodiment, the preset difference can be 2°C, so that the highest temperature and the lowest temperature of the multiple pump sources 21 can be temperature-controlled within the temperature range of the preset difference, which can maximize the heat dissipation effect of the heat dissipation device 10.

[0051] Specifically, step S230 also includes the following steps: when the current difference is greater than the preset difference, generating a flow adjustment signal to increase the flow of the refrigerant in the heat sink 10; the heat sink 10 receives the flow adjustment signal and increases the liquid flow of the heat sink 10 with the highest temperature to reduce the difference value of the heat sink 10 with the highest temperature.

[0052] It can be understood that when the current difference is greater than the preset difference, that is, it is judged that the temperature between the pump source 21 with the highest temperature and the pump source 21 with the lowest temperature exceeds the preset difference temperature, at this time, by increasing the liquid flow rate of the heat dissipation device 10, the heat dissipation efficiency of the pump source 21 can be improved, thereby reducing the temperature difference between the multiple pump sources 21, so that the current difference is restored to the preset difference.

[0053] Specifically, step S230 also includes the following steps: when the current difference is less than the preset difference, generating a flow adjustment signal for reducing or maintaining the same flow of refrigerant of the heat sink 10; the heat sink 10 receives the flow adjustment signal and reduces or maintains the same liquid flow of the heat sink 10 with the highest temperature to reduce the difference value of the heat sink 10.

[0054] It can be understood that when the current difference is less than the preset difference, that is, it is judged that the temperature between the pump source 21 and the pump source 21 with the lowest temperature does not exceed the preset difference temperature. At this time, by reducing the liquid flow of the heat sink 10, the water flow provided by the water cooler can be reduced to reduce waste while ensuring the heat dissipation efficiency of the pump source 21, and the same liquid flow of the heat sink 10 is maintained. In this way, the temperature difference between the multiple pump sources 21 can be reduced, so that the current difference is restored to the preset difference.

[0055] In one embodiment, step S100 includes the following steps: obtaining the initial temperatures of multiple pump sources 21 in the laser system 1; calculating the initial flow rate adjustment signal of the refrigerant of the heat sink 10 according to the difference between the initial temperature and the preset temperature; calculating the average value of multiple initial flow rate adjustment signals, and adjusting the flow rate of the refrigerant of the heat sink 10. Through the above steps, the pump source 21 can be preliminarily temperature controlled so that the pump source 21 maintains a relatively stable temperature before the temperature difference control is performed.

[0056] Furthermore, the step of controlling the liquid flow of the heat dissipation device comprises the following steps:

[0057] The temperature signal is sent to the PID module, and the corresponding PID control strategy is generated according to the difference between the initial temperature and the preset temperature;

[0058] The flow regulation signal of the heat sink 10 is output according to the PID control strategy.

[0059] It can be understood that the PID controller can accurately adjust the flow regulation signal of the heat sink 10 according to the initial temperature of the pump source 21 and make the initial temperature of the pump source 12 reach a stable state through the three functions of proportion, integration and differentiation according to the difference between the set value and the actual output value. This stability allows the temperature of the pump source 21 to be maintained within the set range to avoid affecting its normal operation due to excessive temperature fluctuations; the PID controller has the characteristics of rapid response and can promptly detect and correct deviations in the regulation of the heat sink 10. This allows the temperature of the pump source 21 to quickly reach the set value, improving the temperature regulation response speed and efficiency of the heat sink 10; the PID controller can achieve precise control of the output through precise calculation and optimization. This makes the temperature control of the pump source 21 more precise; in addition, the PID controller has strong adaptability and can be adjusted and optimized according to preset system parameters and environmental conditions. This enables the temperature control system of the pump source 21 and the heat dissipation device 10 to adapt to various working environments and requirements, thereby improving its versatility and flexibility. In this embodiment, by adopting PID control measurement to adjust the temperature of the pump source 21, the heat dissipation stability, response speed, accuracy and adaptability of the heat dissipation device 10 can be effectively improved, thereby improving the operating efficiency and reliability of the laser heat dissipation device 10.

[0060] Furthermore, the PID module is electrically connected to each pump source 21 and the heat dissipation device 10 respectively, and the PID control module 30 is used to send a corresponding adjustment signal according to the difference between the initial temperature and the preset temperature to control the opening and closing of the liquid pump of the heat dissipation device 10.

[0061] In this embodiment, by setting a PID module for each pump source 21 and the liquid pump of the heat sink 10, the initial temperature of each pump source 21 can be accurately obtained, and the liquid pump of the heat sink 10 can be controlled according to the difference value, thereby further improving the control accuracy and control efficiency of the heat sink 10, thereby improving the heat dissipation effect of the heat sink 10.

[0062] Specifically, the preset temperature is 60°C-70°C.

[0063] In a preferred embodiment, the preset temperature may be 65° C. When the heat dissipation device 10 is applied to the laser system 1 , it can ensure that the laser operates at an optimal temperature state, thereby ensuring the operating stability of the laser.

[0064] See also Figure 4As shown, the present invention also provides a laser system 1, which includes a heat dissipation device 10, a laser processing device 20 and a control module 30; the laser processing device 20 is provided with a plurality of pump sources 21; the heat dissipation device 10 includes a water-cooling plate 10 and a liquid pump, the water-cooling plate 10 is respectively connected to the pump source 21 and the pump source 21 and is used to dissipate heat from the pump source 21, and the refrigerant is driven to flow in the water-cooling plate 10 by the liquid pump, so as to realize the heat dissipation and cooling function of the heat dissipation device 10; the control module 30 is signal-connected to the heat dissipation device 10; the control module 30 includes a memory 31 and a processor 32, the memory 31 stores a computer program, and when the processor 32 executes the computer program, the steps of the method in any one of the above embodiments are realized.

[0065] It can be understood that, in the laser system 1 of the present embodiment, by setting a heat dissipation device 10 adopting the control method in any one of the above-mentioned embodiments, in the control method of the present embodiment, by outputting an adjustment signal according to the temperature difference between the multiple pump sources 21, the liquid flow rate of the heat dissipation device 10 in the laser heat dissipation device 10 can be adjusted according to the temperature difference of the multiple pump sources 21. Compared with the traditional laser system that only controls the temperature of the pump source 21 without considering the influence of the temperature difference, there is no need to increase the volume of the laser heat dissipation device 10, and the heat dissipation performance of the heat dissipation device 10 itself can be fully utilized, so that the laser heat dissipation device 10 has a compact structure and the manufacturing cost is reduced, thereby effectively improving the operating reliability and stability of the laser system 1.

[0066] In the description of the embodiments of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the embodiments of the present invention and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as limitations on the embodiments of the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0067] In the description of the embodiments of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "connected" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the embodiments of the present invention can be understood according to specific circumstances.

[0068] In the embodiments of the present invention, unless otherwise clearly specified and limited, the first feature being "above" or "below" the second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "above" and "above" the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. The first feature being "below", "below" and "below" the second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0069] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the embodiment of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0070] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A control method for a laser heat dissipation device, characterized in that: The control method comprises the following steps: Acquiring initial temperatures of a plurality of pump sources in the laser system, and controlling a liquid flow rate of a heat sink according to a difference between the initial temperature and a preset temperature; Acquire current temperature signals of multiple pump sources in the laser system, and generate a flow rate adjustment signal of a refrigerant of a heat sink based on a current difference between a highest temperature and a lowest temperature in the multiple current temperature signals; The liquid flow of the heat dissipation device is controlled based on the flow adjustment signal.

2. The control method of the laser heat dissipation device according to claim 1, characterized in that: The step of acquiring current temperature signals of multiple pump sources in the laser system and generating a flow rate adjustment signal of the cooling liquid of the heat dissipation device based on the current difference between the highest temperature and the lowest temperature in the multiple current temperature signals comprises the following steps: separately calculating a current difference between a highest temperature and a lowest temperature in a plurality of the current temperature signals; Determine the difference between the current difference and the preset difference; When the current difference is greater than the preset difference, a flow rate adjustment signal of the refrigerant liquid of the heat dissipation device is generated to reduce the difference.

3. The control method of the laser heat dissipation device according to claim 2, characterized in that: The preset difference is 0°C-5°C.

4. The control method of the laser heat dissipation device according to claim 2, characterized in that: When the current difference is greater than the preset difference, the step of generating a flow rate adjustment signal of the refrigerant liquid of the heat dissipation device to reduce the difference comprises the following steps: When the current difference is greater than the preset difference, a flow rate adjustment signal for increasing the flow rate of the refrigerant in the heat dissipation device is generated; The heat dissipation device receives the flow adjustment signal and increases the liquid flow of the heat dissipation device to reduce the difference value.

5. The control method of the laser heat dissipation device according to claim 2, characterized in that: The step of acquiring current temperature signals of multiple pump sources in the laser system and generating a flow rate adjustment signal of the cooling liquid of the heat dissipation device based on the current difference between the highest temperature and the lowest temperature in the multiple current temperature signals comprises the following steps: When the current difference is less than the preset difference, a flow rate adjustment signal of the refrigerant liquid of the heat dissipation device is generated to reduce or maintain the same flow rate; The heat sink receives the flow adjustment signal and reduces or maintains the same liquid flow of the heat sink to reduce the difference value.

6. The control method of the laser heat dissipation device according to claim 1, wherein: The step of obtaining the initial temperatures of the plurality of pump sources in the laser system and controlling the liquid flow rate of the heat sink according to the difference between the initial temperatures and the preset temperature comprises the following steps: Obtaining the initial temperatures of multiple pump sources in the laser system; Calculating an initial flow rate adjustment signal of the refrigerant liquid of the heat dissipation device according to the difference between the initial temperature and the preset temperature; An average value of the plurality of initial flow rate adjustment signals is calculated, and the flow rate of the refrigerant in the heat dissipation device is adjusted.

7. The control method of the laser heat dissipation device according to claim 1 or 6, characterized in that: The step of controlling the liquid flow of the heat dissipation device comprises the following steps: The temperature signal is sent to a PID module, and a corresponding PID control strategy is generated according to the difference between the initial temperature and the preset temperature; The liquid flow rate of the heat dissipation device is controlled according to the PID control strategy.

8. The control method of the laser heat dissipation device according to claim 7, characterized in that: The PID control module is used to send a corresponding liquid adjustment signal to the heat dissipation device according to the difference between the initial temperature and the preset temperature, so as to control the opening and closing of the liquid pump of the heat dissipation device.

9. The control method of the laser heat dissipation device according to claim 1, characterized in that: The preset temperature is 60°C-70°C.

10. A laser system comprising: A laser processing device is provided with a plurality of pump sources; A heat dissipation device, comprising a water cooling plate and a liquid pump, wherein the water cooling plate is respectively connected to the liquid pump and the pump source and is used to dissipate heat from the pump source; as well as A control module, signal-connected to the laser heat dissipation device; the control module includes a memory and a processor, the memory stores a computer program, and is characterized in that when the processor executes the computer program, the steps of the method described in any one of claims 1 to 9 are implemented.

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