Water-cooling anti-condensation method for high-energy repetition-frequency laser

Abstract

The invention discloses a water-cooling anti-condensation method for a high-energy repetition-frequency laser, and the method comprises the following steps: S1, monitoring the temperature difference between the interior of the laser and cooling water in a cooling water tank in real time, and starting the cooling water for initial temperature pre-adjustment when the temperature difference exists between the interior of the laser and the cooling water in the cooling water tank; s2, opening a bypass loop, closing the main circulation loop at the same time, and circulating cooling water in the cooling water tank through the bypass loop and heating the cooling water until the cooling water is consistent with the internal temperature of the laser; and S3, the bypass loop is closed, the main circulation loop is opened, the laser is started at the same time, the bypass loop and the main circulation loop are communicated to form a circulation path from the cooling water tank to the laser, and cooling water in the cooling water tank enters a laser crystal water cooler located in the laser through the circulation path. The temperature of cooling water entering the laser is regulated and controlled to be highly matched with the environment temperature, the condensation phenomenon caused by temperature difference in the starting stage of the laser crystal is fundamentally eliminated, and the operation safety, stability and reliability of the laser are improved.

Description

Technical Field

[0001] This invention relates to the field of laser water cooling technology, specifically to a method for preventing condensation in a high-energy, high-repetition-rate laser. Background Technology

[0002] High-energy repetition rate (HRPR) lasers have wide applications in industrial processing, scientific research, and national defense. These lasers generate a large amount of heat during operation, requiring efficient cooling systems to maintain stable operation and extend their lifespan. Currently, mainstream high-energy RPR lasers typically employ water cooling.

[0003] To meet the cleanliness requirements of the laser and to avoid contamination from the water tank during operation, the existing laser body 2' and cooling water tank 1' are usually placed separately (e.g., Figure 1 As shown, the water-cooled tank 1' and the water-cooling cavity 3 inside the laser body 2' are connected by two pipes. This separate placement results in a temperature difference between the water in the cooling tank and the water in the laser body, especially in winter when the tank is placed outdoors or in a low-temperature environment. Therefore, when the laser starts operating and the low-temperature cooling water flows into the crystal assembly inside the laser, because the surface temperature of the laser crystal is higher than the cooling water temperature, water vapor in the air will quickly condense on the crystal surface, forming condensation. This condensation phenomenon can seriously affect the optical performance of the laser and may even damage the crystal, posing a significant risk to the safe and stable operation of the laser.

[0004] To address the condensation problem of laser crystals caused by temperature differences, existing strategies typically involve preheating: before starting the laser, the water tank heating system is activated, allowing the cooling water to gradually heat up in the circulating pipes until the water temperature reaches a preset value before starting the laser. However, this preheating method has inherent drawbacks: the cooling water in the water-cooled tank's chiller pipes and the cooling channels connecting to the laser always contain cooler water, which can still cause condensation on the laser crystal surface. The temperature difference between the water in the pipes and the laser temperature already exists at the initial stage of cooling water circulation, meaning the preheating process cannot completely eliminate the risk of condensation during startup.

[0005] The existing invention patent with publication number CN108508940B discloses a laser temperature feedback regulation control circuit and method. This method uses the laser temperature to adjust the working current of the water chiller, ensuring that the water temperature in the water tank is heated and kept stable, but it does not solve the problem of low water temperature in the connecting pipes.

[0006] The existing invention patent with publication number CN110829162B discloses a fiber laser cooling device based on water cooling and immersion phase change liquid cooling. This device can achieve all-round cooling of each heat-generating surface of the fiber laser device. However, this device cannot solve the problem of condensation on the laser crystal caused by temperature difference, and therefore cannot be applied to high-energy repetition rate lasers.

[0007] The existing utility model patent with publication number CN220659625U discloses a circulating laser water chiller, which consists of a support component, a heat dissipation component and a chiller. However, it also fails to solve the problem of condensation on the laser crystal caused by temperature difference.

[0008] Therefore, current technology cannot effectively solve the condensation problem during the startup of high-energy, high-repetition-rate lasers when the water tank and laser body are separated and the initial water temperature is low. There is an urgent need for a novel water-cooling method that can completely eliminate the risk of condensation on the laser crystal during equipment startup, ensuring the safe and stable operation of the laser. Summary of the Invention

[0009] To address the problem of condensation on the laser crystal during startup of existing high-energy repetition rate lasers when the cooling water tank and laser are placed separately and the initial water temperature of the tank is low, this invention provides a water-cooled anti-condensation method for high-energy repetition rate lasers. By controlling the temperature of the cooling water entering the laser to be highly matched with the ambient temperature, the condensation phenomenon caused by temperature difference on the laser crystal during startup is fundamentally eliminated, thereby improving the operational safety, stability and reliability of the laser.

[0010] To achieve the above objectives, the present invention adopts the following technical solution:

[0011] This invention provides a water-cooled anti-condensation method for a high-energy, high-repetition-rate laser, comprising the following steps:

[0012] S1. Real-time monitoring of the temperature difference between the laser's interior and the cooling water in the cooling water tank. When a temperature difference exists, the cooling water is turned on for initial temperature pre-adjustment.

[0013] S2. Open the bypass circuit and close the main circulation circuit at the same time. The cooling water in the cooling water tank circulates through the bypass circuit and is heated to the same temperature as the inside of the laser.

[0014] S3. Close the bypass circuit, open the main circulation circuit, and start the laser at the same time. The bypass circuit and the main circulation circuit are connected to form a circulation path from the cooling water tank to the laser. The cooling water in the cooling water tank enters the laser crystal water cooler located inside the laser through the circulation path.

[0015] Furthermore, between step S2 and step S3, there is also a step.

[0016] Specifically, a first water temperature sensor is installed inside the cooling water tank to detect the temperature of the cooling water inside the tank. A second water temperature sensor is installed inside the bypass circuit to detect the temperature of the cooling water located within the bypass circuit. A temperature sensor is installed at the laser crystal inside the laser to detect the temperature of the working environment of the laser, particularly the temperature of the working environment of the laser crystal. Step S2 achieves a preliminary adjustment of the water temperature in the bypass circuit to achieve basic equilibrium. Then, the second water temperature sensor continuously monitors the circulating water temperature in the bypass circuit, and the water temperature regulating component in the cooling water tank is used to further precisely regulate the temperature of the circulating water by heating or cooling it, until the circulating water temperatures in the cooling water tank and bypass circuit are highly consistent with the ambient temperature of the laser. When the cooling water temperature inside the cooling water tank, the cooling water temperature in the bypass circuit, and the temperature inside the laser are detected to be consistent, the bypass circuit is closed and the main circulation circuit is opened.

[0017] The control module connects to various sensors, including the temperature sensor inside the laser body, the first water temperature sensor in the cooling water tank, the second water temperature sensor in the bypass circuit, the water temperature regulation component (integrated into the cooling water tank, with heating and / or cooling functions, used to regulate the cooling water temperature to reach the set temperature) and pipeline control valves. It receives temperature signals, executes water temperature pre-regulation control logic, controls the switching between the bypass circuit and the main circulation circuit, and coordinates the safe startup of the laser. The cooling water tank also contains a water pump and valves to drive water circulation in the pipelines.

[0018] Further, in step S3, the main circulation loop is opened, and the cooling water in the cooling water tank first enters the laser crystal water cooler located inside the laser at the maximum flow rate (or at a flow rate of ≥10L / min) through the circulation path and runs for a period of time. Then, the cooling water in the cooling water tank is adjusted to enter the laser crystal water cooler located inside the laser at a preset flow rate through the circulation path.

[0019] Once the temperature of the circulating water in the bypass circuit matches the current operating ambient temperature of the laser, close the bypass circuit and open the main circulation circuit. This allows the pre-balanced cooling water to rapidly flow into the cooling channel of the laser crystal water cooler at its maximum or preset flow rate, thus preventing condensation caused by instantaneous temperature differences. Set and confirm all laser parameters, and then start the laser's pump light to begin operation.

[0020] Furthermore, in step S1, when the temperature difference between the laser's interior and the cooling water in the cooling water tank exceeds 2°C, the cooling water is turned on for initial temperature pre-adjustment.

[0021] Furthermore, the bypass circuit includes a first bypass pipe, a second bypass pipe, and a third bypass pipe. One end of the first bypass pipe and the second bypass pipe are respectively connected to the cooling water tank, and the other end of the first bypass pipe and the second bypass pipe are connected through the third bypass pipe.

[0022] Furthermore, the main circulation loop includes a first circulation pipeline and a second circulation pipeline. The connection point between the first bypass pipeline and the third bypass pipeline is connected to one end of the first circulation pipeline via a first bypass water circulation controller. The first bypass water circulation controller can switch between two states: the first bypass pipeline is connected to the third bypass pipeline or the first circulation pipeline. The connection point between the second bypass pipeline and the third bypass pipeline is connected to one end of the second circulation pipeline via a second bypass water circulation controller. The second bypass water circulation controller can switch between two states: the second bypass pipeline is connected to the third bypass pipeline or the second circulation pipeline. The other ends of the first circulation pipeline and the second circulation pipeline are respectively connected to a laser crystal water cooler located inside the laser.

[0023] In a specific embodiment, the first bypass water circulation controller and the second bypass water circulation controller are three-way control valves.

[0024] The bypass loop is connected in parallel with the main circulation loop via two bypass water circulation controllers. The bypass loop operates before the laser starts. When the temperature data output by the second water temperature sensor in the bypass loop, the first water temperature sensor in the cooling water tank, and the temperature sensor inside the laser are inconsistent, the control module controls the first and second bypass water circulation controllers to connect the first, second, and third bypass pipes, closing the main circulation loop and preventing cooling water from flowing through the laser. The cooling water only circulates within the cooling water tank and bypass pipes for temperature pre-regulation. When the temperature data output by the second water temperature sensor in the bypass loop, the first water temperature sensor in the cooling water tank, and the temperature sensor inside the laser are essentially consistent, the control module controls the first and second bypass water circulation controllers to connect the first bypass pipe to the first circulation pipe and the second bypass pipe to the second circulation pipe, closing the bypass loop and simultaneously opening the main circulation loop to cool the laser crystal.

[0025] Compared with the prior art, the present invention has the following beneficial effects:

[0026] (1) Eliminate condensation of laser crystal inside the high-energy repetitive frequency laser body: Before the cooling water flows through the laser, strict water temperature pre-regulation and bypass circuit pre-circulation are used to ensure that the temperature of the cooling water entering the laser is highly matched with the ambient temperature, which fundamentally eliminates the condensation phenomenon of laser crystal caused by temperature difference during the start-up stage and greatly improves the start-up safety of the laser.

[0027] (2) Improve operational stability and reliability: The stable start-up temperature avoids temperature shock to the laser crystal, reduces transient fluctuations in optical performance, thereby improving the output stability and long-term reliability of the laser throughout the entire operation process.

[0028] (3) Extend the lifespan of the laser: Avoid the potential corrosion and damage of condensation to the laser crystal, pump source and other optical components, and effectively extend the lifespan of the key components of the laser.

[0029] (4) Adaptable to harsh environments: Even in extreme low-temperature environments such as winter, where the cooling water tank is located outdoors, the present invention can ensure the safe start-up of the laser through an intelligent water temperature pre-regulation mechanism, thus expanding the applicable range of the laser.

[0030] (5) High degree of automation: The entire pre-adjustment and switching process is automatically executed by the intelligent control module, which is easy to operate and reduces the risk and complexity of manual intervention.

[0031] (6) Energy saving and high efficiency: Precise temperature control avoids ineffective long-term preheating, improving energy utilization efficiency and equipment start-up efficiency. Attached Figure Description

[0032] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0033] Figure 1 This is a diagram illustrating the connection between the laser body and the cooling water tank in the prior art.

[0034] Figure 2 This is a schematic diagram of the overall structure of the water-cooled anti-condensation device for the high-energy repetitive-frequency laser in this invention;

[0035] Figure 3 This is a flowchart of the water-cooling anti-condensation method for a high-energy repetitive-rate laser in this invention;

[0036] The specific reference numerals in the attached figures are as follows:

[0037] Cooling water tank 1', laser body 2', water-cooled cavity 3',

[0038] Cooling water tank 1, water temperature regulating component 11, first water temperature sensor 12,

[0039] Laser 2, laser crystal 21, laser crystal water cooler 22, temperature sensor 23

[0040] Bypass circuit 3, first bypass pipe 31, second bypass pipe 32, third bypass pipe 33, second water temperature sensor 34.

[0041] First bypass water circulation controller 4

[0042] Second bypass water circulation controller 5,

[0043] Main circulation loop 6, first circulation pipe 61, second circulation pipe 62,

[0044] Control module 7. Detailed Implementation

[0045] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0046] Example 1

[0047] This embodiment discloses a water-cooled anti-condensation device for a high-energy high-repetition-rate laser, such as... Figure 2 As shown, it includes a cooling water tank 1, a laser 2, a bypass circuit 3, and a main circulation circuit 6;

[0048] The cooling water tank 1 is equipped with a water temperature regulating component 11 (the water temperature regulating component 11 is integrated into the cooling water tank 1 and has heating and / or cooling functions, used to regulate the cooling water temperature in the cooling water tank 1 to reach the set temperature) and a first water temperature sensor 12 (used to detect the temperature of the cooling water in the cooling water tank 1). The cooling water tank 1 is also equipped with a water pump and valves to drive the water circulation in the pipeline.

[0049] The laser 2 is equipped with a laser crystal 21, a laser crystal water cooler 22 and a temperature sensor 23. The laser crystal water cooler 22 cools the laser crystal 21 by water cooling. The temperature sensor 23 is installed near the laser crystal water cooler 22 (used to detect the temperature of the working environment of the laser 2, especially the temperature of the working environment of the laser crystal 21).

[0050] The bypass circuit 3 is connected to the cooling water tank 1 and the main circulation circuit 6 respectively. The main circulation circuit 6 is connected to the laser crystal water cooler 22. The bypass circuit 3 can be switched between the first path state and the second path state by the valve.

[0051] When in the first passage state, the bypass circuit 3 is not connected to the main circulation circuit 6, and the cooling water in the cooling water tank 1 circulates only through the bypass circuit 3.

[0052] When in the second path state, the bypass circuit 3 is connected to the main circulation circuit 6, forming a circulation path from the cooling water tank 1 to the laser crystal water cooler 22.

[0053] In specific operation: Before laser 2 is started, the temperature of laser 2 and the water temperature of cooling water tank 1 are detected, and the water temperature in cooling water tank 1 is pre-adjusted to match the temperature of laser 2 through water temperature adjustment component 11; then, an independent bypass circuit 3 is opened to allow cooling water to circulate fully in bypass circuit 3 and stabilize its temperature, without flowing through laser 2; after the water temperature in bypass circuit 3 stabilizes, bypass circuit 3 is closed and the main circulation circuit 6 between cooling water tank 1 and laser 2 is switched on, so that the pre-adjusted cooling water flows into laser crystal water cooler 22, thereby ensuring that laser 2 will not have the risk of condensation caused by temperature difference when it is started, and improving operational safety, stability and reliability.

[0054] The bypass circuit 3 includes a first bypass pipe 31, a second bypass pipe 32 and a third bypass pipe 33. One end of the first bypass pipe 31 and the second bypass pipe 32 are respectively connected to the cooling water tank 1, and the other end of the first bypass pipe 31 and the second bypass pipe 32 are respectively connected to the third bypass pipe 33 and the main circulation circuit 6 through the bypass water circulation controller.

[0055] The main circulation loop 6 includes a first circulation pipe 61 and a second circulation pipe 62. The connection between the first bypass pipe 31 and the third bypass pipe 33 is connected to one end of the first circulation pipe 61 through a first bypass water circulation controller 4. The first bypass water circulation controller 4 can switch between two states: the first bypass pipe 31 is connected to the third bypass pipe 33, or the first circulation pipe 61 is connected. The connection between the second bypass pipe 32 and the third bypass pipe 33 is connected to one end of the second circulation pipe 62 through a second bypass water circulation controller 5. The second bypass water circulation controller 5 can switch between two states: the second bypass pipe 32 is connected to the third bypass pipe 33, or the second circulation pipe 62 is connected. The other ends of the first circulation pipe 61 and the second circulation pipe 62 are respectively connected to the laser crystal water cooler 22.

[0056] In a specific embodiment, the first bypass water circulation controller 4 and the second bypass water circulation controller 5 are three-way control valves.

[0057] Preferably, a second water temperature sensor 34 is installed inside the bypass circuit 3 to detect the temperature of the cooling water in the bypass circuit 3. Based on the consistency of the temperature data output by the second water temperature sensor 34 in the bypass circuit 3, the first water temperature sensor 12 in the cooling water tank 1, and the temperature sensor 23 inside the laser 2, the bypass circuit 3 is switched between the first path state and the second path state by valve control.

[0058] In actual operation, the bypass circuit 3 is partially connected in parallel with the main circulation circuit 6 through two bypass water circulation controllers. The bypass circuit 3 operates before the laser 2 is started. When the temperature data output by the second water temperature sensor 34 in the bypass circuit 3, the first water temperature sensor 12 in the cooling water tank 1, and the temperature sensor 23 inside the laser 2 are inconsistent, the control module 7 controls the first bypass water circulation controller 4 and the second bypass water circulation controller 5 to connect the first bypass pipe 31, the second bypass pipe 32, and the third bypass pipe 33, thereby closing the main circulation circuit 6. This prevents the cooling water from flowing through the laser 2, and the cooling water only circulates in the cooling water tank 1 and the bypass pipes for temperature pre-regulation. When the temperature data output by the second water temperature sensor 34 in the bypass circuit 3, the first water temperature sensor 12 in the cooling water tank 1, and the temperature sensor 23 inside the laser 2 are basically consistent, the control module 7 controls the first bypass water circulation controller 4 and the second bypass water circulation controller 5 to connect the first bypass pipe 31 with the first circulation pipe 61 and the second bypass pipe 32 with the second circulation pipe 62, that is, to close the bypass circuit 3 and open the main circulation circuit 6 at the same time to cool the laser crystal 21.

[0059] The water temperature regulating component 11, the first water temperature sensor 12, the temperature sensor 23, and the second water temperature sensor 34 are all connected to the control module 7. The control module 7 is connected to various sensors, including the temperature sensor 23 inside the laser 2 body, the first water temperature sensor 12 in the cooling water tank 1, the second water temperature sensor 34 in the bypass circuit 3, the water temperature regulating component 11 in the cooling water tank 1, and the pipeline control valves. It is used to receive temperature signals, execute water temperature pre-regulation control logic, control the switching between the bypass circuit 3 and the main circulation circuit 6, and coordinate the safe start-up of the laser 2.

[0060] Example 2

[0061] This invention discloses a water-cooled anti-condensation method for a high-energy, high-repetition-rate laser, such as... Figure 3 As shown, it includes the following steps:

[0062] S1. Before the laser 2 is started, the temperature difference between the inside of the laser 2 and the cooling water inside the cooling water tank 1 is monitored in real time by the temperature data output by the temperature sensor 23 and the first water temperature sensor 12. When there is a temperature difference between the two (when the temperature difference exceeds 2°C), the cooling water in the cooling water tank 1 is actively heated or cooled by the water temperature regulating component 11 until the temperature of the cooling water in the cooling water tank 1 reaches or is close to the temperature inside the laser 2.

[0063] S2. Open the bypass circuit 3 and close the main circulation circuit 6 at the same time, so that the initially pre-conditioned cooling water circulates in the bypass circuit 3, so that the water temperature in the bypass circuit 3 is basically balanced.

[0064] S3. The temperature of the circulating water in the bypass circuit 3 is continuously monitored by the second water temperature sensor 34, and the water temperature adjustment component 11 in the cooling water tank 1 is used to further precisely adjust the temperature of the circulating water for heating or cooling until the temperature of the circulating water in the cooling water tank 1 and the bypass circuit 3 is highly consistent with the ambient temperature of the laser 2.

[0065] S4. When the temperature of the cooling water inside the cooling water tank 1, the temperature of the cooling water in the bypass circuit 3, and the temperature inside the laser 2 are detected to be the same, the bypass circuit 3 is closed and the main circulation circuit 6 is opened. The bypass circuit 3 and the main circulation circuit 6 are connected to form a circulation path from the cooling water tank 1 to the laser 2. The cooling water in the cooling water tank 1 first enters the laser crystal water cooler 22 located inside the laser 2 at the maximum flow rate through the circulation path and runs for a period of time. Then, the cooling water in the cooling water tank 1 is adjusted to enter the laser crystal water cooler 22 located inside the laser 2 at a preset flow rate through the circulation path, thereby avoiding condensation caused by instantaneous temperature differences. The parameters of the laser 2 are set and confirmed, and the pump light of the laser 2 is started to make it work.

[0066] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A water-cooled anti-condensation method for a high-energy, high-repetition-rate laser, characterized in that, Includes the following steps: S1. Real-time monitoring of the temperature difference between the laser's interior and the cooling water in the cooling water tank. When a temperature difference exists, the cooling water is turned on for initial temperature pre-adjustment. S2. Open the bypass circuit and close the main circulation circuit at the same time. The cooling water in the cooling water tank circulates through the bypass circuit and is heated to the same temperature as the inside of the laser. S3. Close the bypass circuit, open the main circulation circuit, and start the laser at the same time. The bypass circuit and the main circulation circuit are connected to form a circulation path from the cooling water tank to the laser. The cooling water in the cooling water tank enters the laser crystal water cooler located inside the laser through the circulation path.

2. The water-cooled anti-condensation method for a high-energy repetition rate laser according to claim 1, characterized in that, Between steps S2 and S3, the process also includes continuously monitoring and precisely adjusting the temperature of the cooling water in the bypass circuit, continuously monitoring the temperature of the circulating water in the bypass circuit, and precisely adjusting the temperature of the circulating water until the temperature of the circulating water is consistent with the current internal temperature of the laser.

3. The water-cooled anti-condensation method for a high-energy repetition rate laser according to claim 2, characterized in that, When the cooling water temperature inside the cooling water tank, the cooling water temperature in the bypass circuit, and the temperature inside the laser are the same, close the bypass circuit and open the main circulation circuit.

4. The water-cooled anti-condensation method for a high-energy repetition rate laser according to claim 3, characterized in that, A first water temperature sensor is installed inside the cooling water tank, a second water temperature sensor is installed inside the bypass circuit, and a temperature sensor is installed at the laser crystal inside the laser. The first water temperature sensor, the second water temperature sensor, and the temperature sensor are all connected to the control module.

5. The water-cooled anti-condensation method for a high-energy repetition rate laser according to claim 4, characterized in that, In step S3, the main circulation loop is opened, and the cooling water in the cooling water tank first enters the laser crystal water cooler located inside the laser at the maximum flow rate through the circulation path and runs for a period of time. Then, the cooling water in the cooling water tank is adjusted to enter the laser crystal water cooler located inside the laser at the preset flow rate through the circulation path.

6. The water-cooled anti-condensation method for a high-energy repetition rate laser according to claim 1, characterized in that, In step S1, when the temperature difference between the laser's interior and the cooling water in the cooling water tank exceeds 2°C, the cooling water is turned on for initial temperature pre-adjustment.

7. The water-cooled anti-condensation method for a high-energy repetition rate laser according to claim 1, characterized in that, The bypass circuit includes a first bypass pipe, a second bypass pipe, and a third bypass pipe. One end of the first bypass pipe and the second bypass pipe are respectively connected to the cooling water tank, and the other end of the first bypass pipe and the second bypass pipe are connected through the third bypass pipe.

8. The water-cooled anti-condensation method for a high-energy repetition rate laser according to claim 7, characterized in that, The main circulation loop includes a first circulation pipe and a second circulation pipe. The connection between the first bypass pipe and the third bypass pipe is connected to one end of the first circulation pipe via a first bypass water circulation controller. The first bypass water circulation controller can switch between two states: the first bypass pipe is connected to the third bypass pipe or the first circulation pipe. The connection between the second bypass pipe and the third bypass pipe is connected to one end of the second circulation pipe via a second bypass water circulation controller. The second bypass water circulation controller can switch between two states: the second bypass pipe is connected to the third bypass pipe or the second circulation pipe. The other ends of the first circulation pipe and the second circulation pipe are respectively connected to a laser crystal water cooler located inside the laser.

9. The water-cooled anti-condensation method for a high-energy repetition rate laser according to claim 8, characterized in that, The first bypass water circulation controller and the second bypass water circulation controller are three-way control valves.

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