Fiber laser and temperature adjusting method

Abstract

The invention discloses an optical fiber laser and a temperature adjusting method, and relates to the technical field of lasers, the optical fiber laser comprises a seed module, an optical amplification module, an output isolator and a temperature control module, and the optical amplification module is connected with the seed module and is used for enhancing the intensity of an optical signal input by the seed module; the output isolator is connected with the optical amplification module and is used for outputting the amplified laser; the temperature control module comprises a controller, a detection assembly and a cooling assembly, the detection assembly is connected with the optical amplification module and detects the temperature of the optical amplification module and feeds back the temperature to the controller, and the controller controls and adjusts the cooling assembly to ensure that the temperature of the optical amplification module is kept stable; according to the scheme, the temperature of the optical amplification module is monitored and adjusted in real time through the temperature control module, the performance of the optical amplification module is prevented from being affected by temperature fluctuation, the output stability of the fiber laser is ensured, and the fiber laser can achieve efficient and stable laser output.

Description

Technical Field

[0001] The invention relates to the technical field of lasers, and in particular to an optical fiber laser and a temperature adjustment method. Background Art

[0002] In industrial application processing, fiber lasers with stable output power are extremely important. Only when the laser power output by the fiber laser remains stable can the quality of laser processing on the workpiece be guaranteed. In fact, it is difficult to make the output power of the fiber laser very stable, because the output power will be affected by the temperature in the fiber laser cavity, especially for high-power pulsed lasers.

[0003] Usually, fiber lasers will generate heat during operation, and the high temperature in the cavity will cause the output power of the pump source to decrease and the center wavelength to shift, which will eventually reduce the output power of the entire fiber laser. In winter, especially in the colder north, due to the low temperature, when the laser cavity is too cold, the output power of the pump source will increase and the center wavelength will shift, and the output power of the laser will increase. In short, whether the temperature of the fiber laser is too high or too low, it will affect the laser efficiency of the fiber laser output, and ultimately affect the effect of workpiece processing. Summary of the invention

[0004] The main purpose of the present invention is to provide a fiber laser and a temperature regulation method, aiming to ensure the stability of the temperature inside the fiber laser and keep the output laser power stable.

[0005] To achieve the above object, the fiber laser proposed in the present invention comprises:

[0006] Seed module;

[0007] An optical amplification module, which is connected to the seed module and is used to enhance the intensity of the optical signal input to the seed module;

[0008] an output isolator, the output isolator being connected to the optical amplification module and being used for outputting amplified laser light;

[0009] The temperature control module includes a controller, a detection component and a cooling component. The detection component is connected to the optical amplification module and detects the temperature of the optical amplification module and feeds back to the controller. The controller controls and adjusts the cooling component to ensure that the temperature of the optical amplification module remains stable.

[0010] In one embodiment, the optical amplification module includes a plurality of pump sources, each of which is connected in series or in parallel, and the detection component includes a plurality of temperature measuring resistors, each of which is connected to a housing of the pump source.

[0011] In one embodiment, the temperature measuring resistor feeds back the detected temperature at a frequency of 2 times per second.

[0012] In one embodiment, the cooling component is a water cooler, a water cooling plate is provided in the fiber laser, the water cooling plate is formed with a cooling water channel, and a water inlet and a water outlet connected at both ends of the cooling water channel, and the water cooler connects the water inlet and the water outlet to transport circulating water into the cooling water channel.

[0013] In one embodiment, the pump source operates at a temperature of 30°C to 38°C.

[0014] The present invention further provides a temperature regulation method for the fiber laser according to any one of claims 1 to 5, comprising:

[0015] Detect the real-time temperature of the pump source and feed it back to the controller;

[0016] Based on the temperature detection result of the pump source, the controller sends an instruction to the water chiller according to a first curve of the cooling water setting water temperature changing with the pump source temperature;

[0017] The water cooler adjusts the water temperature of the output cooling water according to the instruction.

[0018] In one embodiment, the step of the controller controlling the water chiller comprises:

[0019] Receiving a temperature detection result of the detection component;

[0020] Calculate and determine the difference between the actual temperature of the pump source and the normal working temperature based on the test results;

[0021] Matching the first curve according to the calculated difference and the actual temperature, and calculating the water temperature adjustment value of the cooling water required to adjust the pump source to a normal temperature;

[0022] According to the calculation results, corresponding instructions are issued to the water cooler.

[0023] In one embodiment, the step of the controller controlling the water chiller comprises:

[0024] Get the basic water temperature of cooling water when the pump source is working normally;

[0025] Acquire the real-time temperature of the pump source detected by the detection component;

[0026] The temperature of the cooling water is adjusted to the first water temperature. After a unit time, if the temperature of the pump source returns to the normal temperature, the temperature of the cooling water is adjusted to the basic water temperature. If the temperature of the pump source is still higher / lower than the normal temperature, the temperature of the cooling water is adjusted to the second water temperature. After a unit time, the temperature of the pump source is checked until the pump source returns to normal and the temperature of the cooling water is restored to the basic water temperature.

[0027] In one embodiment, the step of acquiring the first curve includes:

[0028] Obtain the temperature of the pump source during normal operation and the basic water temperature of the cooling water;

[0029] Obtaining the first temperature of the abnormal working state of the pump source, and correspondingly adjusting the temperature of the cooling water to the first water temperature; after a unit time, the temperature of the pump source returns to normal, adjusting the temperature of the cooling water to the basic water temperature, and recording the value of the first temperature and the temperature when the pump source works normally, the difference between the two, and the difference between the first temperature and the basic water temperature;

[0030] The first temperature with different values ​​and the corresponding first water temperature are obtained multiple times and recorded, and a model is built according to the actual data to obtain a change curve of the water temperature adjustment amount and the actual working temperature of the pump source in unit time.

[0031] The technical solution of the present invention proposes a fiber laser, including a seed module, an optical amplification module, an output isolator and a temperature control module. The temperature of the optical amplification module is monitored and adjusted in real time by the temperature control module to prevent performance degradation or equipment damage caused by temperature fluctuations, thereby improving the reliability and stability of the fiber laser, effectively preventing the optical amplification module from affecting performance due to temperature fluctuations, ensuring the output stability of the fiber laser, and enabling the fiber laser to achieve efficient and stable laser output. In addition, the modular design facilitates maintenance and upgrading, and improves the adaptability and flexibility of the fiber laser. 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 the structures shown in these drawings without paying creative work.

[0033] Figure 1 A schematic diagram of the process of temperature regulation of a fiber laser provided by the present invention;

[0034] Figure 2 A schematic flow chart of the temperature adjustment method provided by the present invention;

[0035] Figure 3 A schematic diagram of a flow chart of an embodiment of a controller controlling a water chiller;

[0036] Figure 4 The figure is a flow chart of another embodiment of a controller controlling a water chiller.

[0037] Description of Figure Numbers:

[0038] 1000. Fiber laser; 1. Seed module; 2. Optical amplification module; 21. Pump source; 3. Output isolator; 4. Temperature control module; 41. Controller; 42. Detection component; 43. Cooling component.

[0039] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0040] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments 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 creative work are within the scope of protection of the present invention.

[0041] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture. If the specific posture changes, the directional indication will also change accordingly.

[0042] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features limited to "first" and "second" may explicitly or implicitly include at least one of the features. In addition, if "and / or" or "and / or" appears in the full text, its meaning includes three parallel solutions. Taking "A and / or B" as an example, it includes solution A, solution B, or solutions that satisfy both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0043] In industrial application processing, fiber lasers with stable output power are extremely important. Only when the laser power output by the fiber laser remains stable can the quality of laser processing on the workpiece be guaranteed. In fact, it is difficult to make the output power of the fiber laser very stable, because the output power will be affected by the temperature in the fiber laser cavity, especially for high-power pulsed lasers.

[0044] Usually, fiber lasers will generate heat during operation, and the high temperature in the cavity will cause the output power of the pump source to decrease and the center wavelength to shift, which will eventually reduce the output power of the entire fiber laser. In winter, especially in the colder north, due to the low temperature, when the laser cavity is too cold, the output power of the pump source will increase and the center wavelength will shift, and the output power of the laser will increase. In short, whether the temperature of the fiber laser is too high or too low, it will affect the laser efficiency of the fiber laser output, and ultimately affect the effect of workpiece processing.

[0045] To solve the above problems, the present invention proposes a fiber laser 1000, including a seed module 1, an optical amplifying module 2, an output isolator 3 and a temperature control module 4. The optical amplifying module 2 is connected to the seed module 1, and is used to enhance the intensity of the optical signal input by the seed module 1; the output isolator 3 is connected to the optical amplifying module 2, and is used to output the amplified laser; the temperature control module 4 includes a controller 41, a detection component 42 and a cooling component 43. The detection component 42 is connected to the optical amplifying module 2, and detects the temperature of the optical amplifying module 2 and feeds it back to the controller 41. The controller 41 controls and adjusts the cooling component 43 to ensure that the temperature of the optical amplifying module 2 remains stable.

[0046] The technical solution of the present invention proposes a fiber laser 1000, including a seed module 1, an optical amplification module 2, an output isolator 3 and a temperature control module 4. The seed module 1 provides an initial laser signal, and the laser signal is further amplified by the optical amplification module 2 to obtain a higher power output to achieve processing of the workpiece. The output isolator 3 ensures that the output laser beam is transmitted unidirectionally, prevents reverse light feedback from entering the fiber laser 1000, and ensures the stability of the fiber laser 1000. The temperature control module 4 monitors and adjusts the temperature of the optical amplification module 2 in real time to prevent performance degradation or equipment damage caused by temperature fluctuations, thereby improving the reliability and stability of the fiber laser 1000, effectively preventing the optical amplification module 2 from affecting performance due to temperature fluctuations, ensuring the output stability of the fiber laser 1000, and enabling the fiber laser 1000 to achieve efficient and stable laser output. In addition, the modular design facilitates maintenance and upgrading, and improves the adaptability and flexibility of the fiber laser 1000.

[0047] In an optional embodiment, in order to facilitate the precise adjustment of the optical amplification module 2, the optical amplification module 2 includes a plurality of pump sources 21, each pump source 21 is arranged in series / parallel, and the detection component 42 includes a plurality of temperature measuring resistors, and a temperature measuring resistor is connected to the housing of a pump source 21. By arranging a plurality of pump sources 21 in series or in parallel, a more flexible pumping strategy is provided to adapt to the working requirements of the fiber laser 1000 for different powers. A temperature measuring resistor is connected to the housing of each pump source 21, so that the temperature detection is more accurate, and the temperature can be monitored separately for each pump source 21. The fiber laser 1000 is allowed to operate under the configuration of multiple pump sources 21, which improves the output power and flexibility of the fiber laser 1000. For example, in a high-power fiber laser 1000, a higher output power is achieved by connecting a plurality of pump sources 21 in parallel, and the temperature of each pump source 21 is monitored in real time by the connected temperature measuring resistor to ensure that it will not be damaged due to overheating during high-power operation.

[0048] In an optional embodiment, the temperature measuring resistor feedback detects the temperature at a frequency of 2 times / second. In this solution, the temperature measuring resistor feedback detects the temperature at a frequency of twice per second. This allows the temperature measuring resistor to provide fast enough feedback so that the controller 41 can make timely adjustments. By setting a higher temperature detection frequency, the laser can respond to temperature changes more quickly, thereby achieving more accurate temperature control, so that the temperature can be adjusted in time through the cooling component 43 through the feedback result of the temperature measuring resistor to ensure that the fiber laser 1000 can maintain a normal working state. For example, in laser processing equipment, the pump source 21 will generate a lot of heat when working at high load. Through the temperature detection frequency of twice per second, the controller 41 can quickly adjust the cooling system to prevent the pump source 21 from overheating.

[0049] In an optional embodiment, in order to facilitate the temperature regulation of the fiber laser 1000 by the cooling component 43, the cooling component 43 is a water cooler, and a water cooling plate is provided in the fiber laser 1000. The water cooling plate is formed with a cooling water channel, and a water inlet and a water outlet connected at both ends of the cooling water channel. The water inlet and the water outlet of the water cooler are connected to transport circulating water into the cooling water channel. In the actual design, the cold water plate is arranged at the bottom of the shell of the fiber laser 1000, and the heat in the fiber laser 1000 is taken away by transporting flowing cooling water into the water cooling plate through the water cooler, thereby achieving the water cooling effect of the pump source 21. The design of the water cooler and the water cooling plate can effectively take away the heat generated by the pump source 21 and keep the pump source 21 working at a stable temperature. Thereby ensuring the stability of the laser power output by the fiber laser 1000 and the stability of the effect of the explosive laser processing. It should be noted that the temperature of the cooling water output by the water cooler can be adjusted, that is, the water cooler can help the pump source 21 cool down by outputting cooling water with a lower temperature to the water cooling plate when the temperature of the pump source 21 is too high, or it can help the pump source 21 heat up by outputting a higher temperature water flow to reach a normal working state when the temperature of the pump source 21 in the cavity of the fiber laser 1000 is too low due to the low outside temperature. In this way, the fiber laser 1000 can adapt to working environments with different temperatures and can be adjusted accordingly at any time, thereby ensuring the working efficiency of the fiber laser 1000 and extending the service life of the fiber laser 1000. In this embodiment, the operating temperature of the pump source 21 is 30°C to 38°C. By controlling the operating temperature of the pump source 21 within a relatively low range, performance degradation or damage caused by excessively high or low temperatures can be effectively avoided. At the same time, it is also convenient for the temperature control module 4 to adjust the temperature of the optical amplification module 2 in a timely manner.

[0050] The present invention also provides a temperature adjustment method for the above fiber laser 1000, the temperature adjustment method comprising:

[0051] Detecting the real-time temperature of the pump source 21 and feeding it back to the controller 41;

[0052] Based on the temperature detection result of the pump source 21, the controller 41 sends a command to the water chiller according to a first curve of the cooling water setting water temperature changing with the temperature of the pump source 21;

[0053] The water chiller adjusts the temperature of the output cooling water according to the instruction.

[0054] In an optional embodiment, the real-time temperature of the pump source 21 is detected and fed back to the controller 41, and the controller 41 adjusts the water temperature of the water cooler according to the temperature detection result to keep the temperature of the pump source 21 stable. The temperature of the pump source 21 is dynamically controlled, and the pump source 21 is ensured to always work within the optimal temperature range through real-time monitoring and adjustment. The controller 41 uses a single-chip microcomputer, and detects the temperature of the pump source 21 shell through a temperature measuring resistor and feeds back to the controller 41. The controller 41 sends a corresponding instruction to the water cooler according to the first curve of the pre-stored cooling water temperature and the pump source 21 temperature, so that it adjusts the water temperature of the cooling water output to the water cooling disk, thereby adjusting the temperature of the pump source 21. Ensure that the temperature of the fiber laser 1000 is always kept within the optimal range in the continuous working mode.

[0055] Further, the step of the controller 41 controlling the water chiller includes: receiving the temperature detection result of the detection component 42;

[0056] Calculate and determine the difference between the actual temperature of the pump source 21 and the normal working temperature according to the detection result;

[0057] Matching the first curve according to the calculated difference and the actual temperature, and calculating the water temperature adjustment value of the cooling water required to adjust the pump source 21 to a normal temperature;

[0058] According to the calculation results, corresponding instructions are issued to the water cooler.

[0059] In the actual control process, the controller 41 outputs instructions to adjust the temperature of the cooling water output by the water chiller. The instructions can be directly sent according to the temperature of the corresponding cooling water when the pump source 21 is in various temperature states on the first curve, so that the water chiller adjusts the temperature of the cooling water to the required temperature. Alternatively, the controller 41 calculates the temperature difference between the actual temperature of the pump source 21 and the normal working state, and correspondingly calculates the water temperature difference of the cooling water to be adjusted, thereby sending instructions to the water chiller to increase or decrease a certain temperature difference to achieve the water temperature adjustment of the cooling water, so that the adjustment effect can be achieved.

[0060] In another embodiment, the step of the controller 41 controlling the water chiller includes:

[0061] Obtain the basic water temperature of cooling water when the pump source 21 works normally;

[0062] Acquiring the real-time temperature of the pump source 21 detected by the detection component 42;

[0063] Adjust the temperature of the cooling water to the first water temperature. After a unit time, if the temperature of the pump source 21 returns to the normal temperature, adjust the temperature of the cooling water to the basic water temperature. If the temperature of the pump source 21 is still higher / lower than the normal temperature, adjust the temperature of the cooling water to the second water temperature. After a unit time, check the temperature of the pump source 21 until the pump source 21 returns to normal and restores the temperature of the cooling water to the basic water temperature. When the fiber laser 1000 is in some unfamiliar working environment for the first time, the fiber laser 1000 can be gradually adjusted to gradually adapt to the new working environment, and facilitate subsequent autonomous temperature adjustment. By adjusting the water temperature of the cooling water to a certain value within a unit time, and providing real-time feedback on the actual temperature of the pump source 21 through the detection component 42, the temperature of the pump source 21 can be adjusted to the normal temperature in the shortest time. In this process, the amount of each adjustment per unit time can be the same, which can facilitate finding the connection between the actual temperature of the pump source 21 and the actual change in the water temperature of the cooling water. Alternatively, when the actual temperature of the pump source 21 gradually approaches the normal temperature, the temperature adjustment amount of the cooling water per unit time can be gradually reduced, which can ensure that the temperature of the pump source 21 is adjusted to a normal state as soon as possible, and can avoid the situation where the temperature of the pump source 21 exceeds the normal range from the other end due to excessive adjustment. For example, the pump source 21 originally needs to be cooled down to restore it to normal. By gradually reducing the adjustment amount, the situation where the temperature of the pump source 21 is too low due to excessive adjustment per unit time is avoided. It should be noted that the unit time mentioned here refers to a fixed time period, such as 10 seconds, 30 seconds, or one minute. The specific length of the unit time can be selected according to actual needs. In this way, the cooling strategy is flexibly adjusted according to the actual working state of the pump source 21. By gradually adjusting the water temperature and checking the temperature response of the pump source 21, the temperature of the pump source 21 can be effectively controlled within the normal range, ensuring that the temperature of the fiber laser 1000 is always maintained at the best state.

[0064] In an optional embodiment, to facilitate data collection of the first curve, the step of acquiring the first curve includes:

[0065] Obtain the temperature of the pump source 21 when it is working normally and the basic water temperature of the cooling water;

[0066] Obtain the first temperature of the abnormal working state of the pump source 21, and adjust the temperature of the cooling water to the first water temperature accordingly. After a unit time, the temperature of the pump source 21 returns to normal, adjust the temperature of the cooling water to the basic water temperature, and record the value of the corresponding first temperature and the temperature when the pump source 21 works normally, the difference between the two, and the difference between the corresponding first temperature and the basic water temperature;

[0067] The first temperature of different values ​​and the corresponding first water temperature are obtained multiple times and recorded, and modeling is performed according to actual data to obtain the change curve of the water temperature adjustment amount and the actual working temperature of the pump source 21 in a unit time. By obtaining the corresponding water temperature of the cooling water at different temperatures multiple times in a unit time, and modeling the relationship between the two according to the recorded results, a first curve corresponding to the temperature change is obtained, and the first curve is continuously optimized through gradually increasing data to make it more accurate, so that the temperature of the pump source 21 can be quickly restored to a normal state in the subsequent automatic adjustment state. In short, the first curve obtained by this autonomous learning method can provide an accurate reference model for the controller 41, so that it can accurately adjust the water temperature of the cooling water according to the actual temperature change of the pump source 21, and improve the performance and reliability of the fiber laser 1000. Optionally, in this autonomous learning process, not only the temperature of the cooling water can be used as a variable for adjustment, but the flow rate of the cooling water, or the length of the unit time can also be used as a variable to continuously optimize the data model. After obtaining enough data, more efficient adjustment can be achieved by comprehensively changing the temperature, flow rate and adjustment unit of the cooling water, thereby improving the efficiency of the entire temperature control module 4 and reducing the time that the pump source 21 is in an abnormal temperature state, thereby extending the service life of the entire fiber laser 1000.

[0068] The above description is only an exemplary embodiment of the present invention, and does not limit the patent scope of the present invention. All equivalent structural changes made by using the contents of the present invention specification and drawings under the technical concept of the present invention, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A fiber laser, characterized in that: include: Seed module; An optical amplification module, which is connected to the seed module and is used to enhance the intensity of the optical signal input to the seed module; an output isolator, the output isolator being connected to the optical amplification module and being used for outputting amplified laser light; The temperature control module includes a controller, a detection component and a cooling component. The detection component is connected to the optical amplification module and detects the temperature of the optical amplification module and feeds back to the controller. The controller controls and adjusts the cooling component to ensure that the temperature of the optical amplification module remains stable.

2. The fiber laser according to claim 1, characterized in that The optical amplification module includes a plurality of pump sources, each of which is connected in series or in parallel. The detection component includes a plurality of temperature measuring resistors, and one of the temperature measuring resistors is connected to the housing of one of the pump sources.

3. The fiber laser according to claim 2, characterized in that: The temperature measuring resistor feeds back the detected temperature at a frequency of 2 times per second.

4. The fiber laser according to claim 2, characterized in that: The cooling component is a water cooler, and a water cooling plate is provided in the fiber laser. The water cooling plate forms a cooling water channel, and a water inlet and a water outlet connected at both ends of the cooling water channel. The water cooler connects the water inlet and the water outlet to transport circulating water into the cooling water channel.

5. The fiber laser according to claim 2, characterized in that: The operating temperature of the pump source is 30°C to 38°C.

6. A temperature regulation method for a fiber laser as claimed in any one of claims 1 to 5, characterized in that: include: Detect the real-time temperature of the pump source and feed it back to the controller; Based on the temperature detection result of the pump source, the controller sends an instruction to the water chiller according to a first curve of the cooling water setting water temperature changing with the pump source temperature; The water cooler adjusts the water temperature of the output cooling water according to the instruction.

7. The temperature adjustment method according to claim 6, characterized in that: The step of the controller controlling the water chiller comprises: Receiving a temperature detection result of the detection component; Calculate and determine the difference between the actual temperature of the pump source and the normal working temperature based on the test results; Matching the first curve according to the calculated difference and the actual temperature, and calculating the water temperature adjustment value of the cooling water required to adjust the pump source to a normal temperature; According to the calculation results, corresponding instructions are issued to the water cooler.

8. The temperature adjustment method according to claim 6, characterized in that: The step of the controller controlling the water chiller comprises: Get the basic water temperature of cooling water when the pump source is working normally; Acquire the real-time temperature of the pump source detected by the detection component; The temperature of the cooling water is adjusted to the first water temperature. After a unit time, if the temperature of the pump source returns to the normal temperature, the temperature of the cooling water is adjusted to the basic water temperature. If the temperature of the pump source is still higher / lower than the normal temperature, the temperature of the cooling water is adjusted to the second water temperature. After a unit time, the temperature of the pump source is checked until the pump source returns to normal and the temperature of the cooling water is restored to the basic water temperature.

9. The temperature adjustment method according to claim 6, characterized in that: The step of acquiring the first curve comprises: Obtain the temperature of the pump source during normal operation and the basic water temperature of the cooling water; Obtaining the first temperature of the abnormal working state of the pump source, and correspondingly adjusting the temperature of the cooling water to the first water temperature; after a unit time, the temperature of the pump source returns to normal, adjusting the temperature of the cooling water to the basic water temperature, and recording the value of the first temperature and the temperature when the pump source works normally, the difference between the two, and the difference between the first temperature and the basic water temperature; The first temperature with different values ​​and the corresponding first water temperature are obtained multiple times and recorded, and a model is built according to the actual data to obtain a change curve of the water temperature adjustment amount and the actual working temperature of the pump source in unit time.

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