Method, device and system for managing light emitting stability of laser

Abstract

The invention discloses a laser light emitting stability management method, device and system, a laser comprises an evaporator used for forming a direct cooling loop, a first throttling element, a compressor, a condenser and a second throttling element, and the management method specifically comprises the following steps that the temperature of the evaporator is obtained; acquiring rotating speeds of fans of the compressor and the condenser; and when the temperature of the evaporator is smaller than the minimum value of the first preset temperature range and the rotating speed of the compressor and the rotating speed of the fan of the condenser both reach the minimum preset rotating speed, the refrigerant flow of the first throttling element is lowered. The working pressure in the direct cooling plate is controlled by controlling the working state of the first throttling element, then the refrigerant flow in the evaporator is adjusted, it is ensured that normal light emitting of the laser is not affected by the temperature of the evaporator, and the low-temperature adaptability of the laser is greatly improved. The problem that normal operation of the laser is affected due to the fact that the temperature of the evaporator is too low under the low-environment-temperature and low-heat-load working conditions can be solved.

Description

Technical Field

[0001] The present application relates to the field of laser technology, and more specifically, to a laser light output stability management method, device and system thereof. Background Art

[0002] At present, as the power of lasers increases, the heat flux density also increases, and the traditional external chiller system is gradually unable to meet the heat dissipation needs of its high heat flux density. Direct cooling lasers can solve the high heat flux density problem very well.

[0003] Direct-cooling laser integrates laser and direct-cooling refrigeration system. The existing direct-cooling refrigeration system includes an evaporator, a compressor, a condenser and a throttling element which are connected in sequence. The refrigerant circulates in the evaporator, the compressor, the condenser and the throttling element. The pump source and its related optical devices are installed closely with the evaporator. The refrigerant evaporates in the evaporator and exchanges heat with the pump source, thereby realizing the cooling of the pump source and other devices.

[0004] However, when the ambient temperature is low and the heat load demand of the laser is low, the temperature of the evaporator will be too low, affecting the light output stability of the laser. If the temperature of the evaporator continues to drop, it may even cause the laser to shut down due to a low temperature alarm. Summary of the invention

[0005] The purpose of this application is to overcome the above-mentioned defects of the prior art and to provide a method, device and system for managing laser light output stability, so as to solve the problem that the normal operation of the laser is affected by the low evaporator temperature under low ambient temperature and low heat load conditions.

[0006] To achieve the above purpose, a technical solution of the present application is as follows:

[0007] A method for managing laser light output stability, the laser comprising an evaporator, a compressor, a condenser and a second throttling element for forming a direct cooling circuit, the direct cooling circuit being used for circulating a refrigerant, the direct cooling circuit further comprising a first throttling element arranged between the evaporator and the compressor, the evaporator performing heat exchange with a heat generating component of the laser, the management method comprising the following steps:

[0008] S1, obtaining the temperature of the evaporator;

[0009] S2, obtaining the rotation speeds of the fans of the compressor and the condenser;

[0010] S3. When the temperature of the evaporator is lower than the minimum value of the first preset temperature range, and the rotation speeds of the fans of the compressor and the condenser reach the minimum preset rotation speeds, the refrigerant flow rate of the first throttling element is reduced.

[0011] As a preferred solution, it also includes:

[0012] When the temperature of the evaporator is greater than the maximum value of the first preset temperature range, increasing the speed of the compressor and / or increasing the speed of the fan of the condenser;

[0013] When the temperature of the evaporator is within the first preset temperature range, controlling the direct cooling circuit to maintain a current state;

[0014] When the temperature of the evaporator is lower than the minimum value of the first preset temperature range, and the speed of the compressor and / or the fan of the condenser is not at the minimum preset speed, the speed of the compressor and / or the speed of the fan of the condenser is lowered until the minimum preset speed.

[0015] As a preferred solution, before S1, it also includes: obtaining the operating environment temperature and current light output power of the laser, judging whether the laser is in a low temperature and low load condition, and starting the management method when the laser is in the low temperature and low load condition.

[0016] As a preferred solution, lowering the refrigerant flow rate of the first throttling element includes:

[0017] When the speeds of the fans of the compressor and the condenser are both at the minimum preset speed, it is determined whether the temperature of the evaporator is within a second preset temperature range, and the refrigerant flow of the first throttling element is adjusted according to the temperature of the evaporator.

[0018] As a preferred solution, when the temperature of the evaporator is within the second preset temperature range, the refrigerant flow rate of the first throttling element is reduced until the temperature change of the evaporator is maintained at the first preset temperature change value;

[0019] When the temperature of the evaporator is lower than the minimum value of the second preset temperature range, the refrigerant flow of the first throttling element is reduced until the temperature of the evaporator changes within the second preset temperature change value and the temperature of the evaporator is higher than the third preset temperature.

[0020] As a preferred solution, when the temperature of the evaporator is within the second preset temperature range, the refrigerant flow rate of the first throttling element is reduced at a first speed;

[0021] When the temperature of the evaporator is lower than the minimum value of the second preset temperature range, the refrigerant flow of the first throttling element is reduced at a second speed.

[0022] As a preferred solution, the second speed is greater than the first speed.

[0023] As a preferred solution, the first throttling element and the second throttling element are respectively electronic expansion valves or valves with adjustable opening.

[0024] As another aspect of the present application, a laser light output stability management device is also proposed, which includes an evaporator, a first throttling element, a compressor, a condenser and a second throttling element for forming a direct cooling circuit, the first throttling element is located on the outlet side of the evaporator, and the second throttling element is located on the inlet side of the evaporator. The refrigerant circulates in the evaporator, the first throttling element, the compressor, the condenser and the second throttling element in sequence, and the evaporator performs heat exchange with the heat-generating components of the laser.

[0025] As another aspect of the present application, a laser light output stability management system is also proposed, which includes a laser, a chiller and a controller, the chiller is connected to the direct cooling circuit of the laser through a pipeline, and the controller is arranged inside the laser to execute any of the management methods described above.

[0026] Implementing the embodiments of the present application will have the following beneficial effects:

[0027] The embodiment of the present application adds a first throttling element on the outlet side of the evaporator. When the temperature of the evaporator is too low, the evaporation pressure in the evaporator is increased by closing the opening of the first throttling element, thereby increasing the evaporation temperature or preventing the evaporation temperature from continuing to drop, thereby avoiding the evaporator temperature from being too low. This can improve the light output stability of the laser under low temperature and low load conditions, reduce the phenomenon of laser shutdown due to low temperature alarms, and broaden the low temperature adaptability of direct-cooled lasers. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the embodiments of the present application 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 application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0029] in:

[0030] Figure 1 It is a flow chart of the laser light output stability management method of the present application;

[0031] Figure 2 It is a flow chart of a method for managing laser light output stability according to a specific embodiment of the present application;

[0032] Figure 3It is a structural schematic diagram of a laser light output stability management device according to a specific embodiment of the present application;

[0033] Figure 4 is a schematic diagram of the structure of a laser light output stability management system in a specific embodiment of the present application,

[0034] In the figure, 1, evaporator; 2, first throttling element; 3, compressor; 4, condenser; 5, second throttling element; 6, first valve; 7, second valve. DETAILED DESCRIPTION

[0035] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0036] Please refer to Figure 1 and Figure 3 The present application discloses a method for managing the light output stability of a laser. The laser includes an evaporator 1, a compressor 3, a condenser 4, and a second throttling element 5 for forming a direct cooling circuit. The direct cooling circuit is used for circulating a refrigerant. The direct cooling circuit also includes a first throttling element 2 disposed between the evaporator 1 and the compressor 3. The evaporator 1 performs heat exchange with the heat generating components of the laser. The laser light output stability management method of the present application specifically includes the following steps:

[0037] S1, obtaining the temperature of the evaporator;

[0038] S2, obtaining the speed of the fans of the compressor and the condenser;

[0039] S3. When the temperature of the evaporator is lower than the minimum value of the first preset temperature range, and the speeds of the fans of the compressor and the condenser reach the minimum preset speeds, the refrigerant flow of the first throttling element is reduced.

[0040] In this embodiment, the laser can emit laser, and the type of laser emitted by the laser is not specifically limited in this application. Exemplarily, the temperature control system can be used for a fiber laser, in which the laser can emit fiber laser.

[0041] The above technical solution adds a first throttling element 2 on the outlet side of the evaporator 1. When the temperature of the evaporator 1 is too low, the evaporation pressure in the evaporator 1 is increased by closing the opening of the first throttling element 2, thereby increasing the evaporation temperature or preventing the evaporation temperature from continuing to drop, avoiding the evaporator 1 from being too low in temperature. This can improve the light output stability of the laser under low temperature and low load conditions, reduce the phenomenon of laser shutdown due to low temperature alarms, and broaden the low temperature adaptability of direct-cooled lasers.

[0042] Please refer to Figure 2 In one embodiment, the laser light output stability management method further includes:

[0043] When the temperature of the evaporator 1 is greater than the maximum value of the first preset temperature range, the speed of the compressor 3 is increased and / or the speed of the fan of the condenser 4 is increased;

[0044] When the temperature of the evaporator 1 is within the first preset temperature range, the direct cooling circuit is controlled to maintain the current state;

[0045] When the temperature of the evaporator 1 is lower than the minimum value of the first preset temperature range, and the speed of the fan of the compressor 3 and / or the condenser 4 is not at the minimum preset speed, the speed of the compressor 3 and / or the speed of the fan of the condenser 3 is lowered to the minimum preset speed.

[0046] It can be understood that a first preset temperature range is pre-set in the laser. When the temperature of the evaporator 1 is greater than the maximum value of the first preset temperature range, it means that the temperature of the evaporator 1 is relatively high. At this time, the laser does not have the problem of abnormal operation caused by the evaporator 1 being too low in temperature, and the light emission is not affected by low temperature. When the temperature of the evaporator 1 is less than the minimum value of the first preset temperature range, it means that the temperature of the evaporator 1 is relatively low, and the laser is at risk of abnormal operation at low temperature. Based on this, when it is confirmed that the speed of the fan of the compressor 3 and the condenser 4 has reached the minimum preset speed, the refrigerant flow of the first throttling element 2 is reduced to ensure that the temperature of the evaporator 1 will not affect the normal light emission of the laser, thereby greatly improving the low temperature adaptability of the laser. Relevant practitioners reasonably design the first preset temperature range according to product requirements, and this application will not go into details here.

[0047] Please continue to refer to Figure 2 Before S1, it also includes S10: obtaining the ambient temperature and current light output power of the laser, judging whether the laser is in a low-temperature and low-load working condition, and when the laser is in a low-temperature and low-load working condition, starting the laser light output stability management method of the present application to improve the light output stability of the laser under the low-temperature and low-load working condition, and reducing the phenomenon of laser shutdown due to low-temperature alarm.

[0048] In one embodiment, lowering the refrigerant flow of the first throttling element 2 includes: when the speeds of the fans of the compressor 3 and the condenser 4 are both at the minimum preset speeds, determining whether the temperature of the evaporator 1 is within a second preset temperature range, and adjusting the refrigerant flow of the first throttling element 2 according to the temperature of the evaporator 1.

[0049] Furthermore, when the temperature of the evaporator 1 is within the second preset temperature range, the refrigerant flow rate of the first throttling element 2 is reduced until the temperature change of the evaporator 1 is maintained at the first preset temperature change value; when the temperature of the evaporator 1 is lower than the minimum value of the second preset temperature range, the refrigerant flow rate of the first throttling element 2 is reduced until the temperature change of the evaporator 1 is within the second preset temperature change value, and the temperature of the evaporator 1 is greater than the third preset temperature.

[0050] When the temperature of the evaporator 1 is within a second preset temperature range, the refrigerant flow rate of the first throttling element 2 is reduced at a first speed;

[0051] When the temperature of the evaporator 1 is lower than the minimum value of the second preset temperature range, the refrigerant flow rate of the first throttling element 2 is reduced at a second speed.

[0052] It can be understood that the second speed is greater than the first speed.

[0053] In an embodiment of the present application, the first throttling element and the second throttling element are respectively an electronic expansion valve or an adjustable opening valve.

[0054] Please continue to refer to Figure 3 The principle of the laser light output stability management method of the present application is:

[0055] S10: Obtain the ambient temperature and optical power to determine whether the laser is in a low temperature and low load condition;

[0056] S20: When the laser is in a low temperature and low load condition, it is determined whether the temperature of the evaporator 1 is in a first preset temperature range. The first preset temperature range is a normal operating temperature range of the evaporator 1.

[0057] S30: When the temperature of the evaporator 1 is greater than the maximum value of the first preset temperature range, the speed of the compressor 3 is increased and / or the fan speed of the condenser 4 is increased to speed up the cooling rate so as to reduce the temperature of the evaporator 1 to within the first preset temperature range.

[0058] S40: When the temperature of the evaporator 1 is within the first preset temperature range, the direct cooling circuit maintains the current state.

[0059] S50: When the temperature of the evaporator 1 is lower than the minimum value of the first preset temperature range, it is determined whether the rotation speeds of the fans of the compressor 3 and the condenser 4 are both at the minimum preset rotation speed.

[0060] S60: When the speed of the fan of the compressor 3 and / or the condenser 4 is not at the minimum preset speed, the speed of the compressor 3 and / or the speed of the fan of the condenser 4 is lowered to the minimum preset speed, thereby increasing the temperature of the evaporator 1 to the normal operating temperature range.

[0061] S70: When the speeds of the fans of the compressor 3 and the condenser 4 are both at the minimum preset speed, the refrigerant flow of the first throttling element 2 is reduced to increase the evaporation pressure in the evaporator 1, thereby increasing the evaporation temperature or preventing the evaporation temperature from continuing to drop.

[0062] In a specific embodiment, step S70 further includes the following process:

[0063] S71: When the speeds of the fans of the compressor 3 and the condenser 4 are both at the minimum preset speeds, it is determined whether the temperature of the evaporator 1 is within a second preset temperature range, where the second preset temperature range is the allowable low temperature operating temperature range of the evaporator 1. The second preset temperature range is lower than the first preset temperature range, and relevant practitioners reasonably design the second preset temperature range according to product requirements, which is not described in detail in this application.

[0064] S72: When the temperature of the evaporator 1 is within the second preset temperature range, the refrigerant flow of the first throttling element 2 is reduced until the temperature change of the evaporator 1 is maintained at the first preset temperature change value. The first preset temperature change value may be ±1°C, ±2°C, etc.

[0065] S73: When the temperature of the evaporator 1 is lower than the minimum value of the second preset temperature range, the refrigerant flow of the first throttling element 2 is adjusted downward until the temperature of the evaporator 1 changes to the second preset temperature change value, and the temperature of the evaporator 1 is greater than the third preset temperature, the third preset temperature is the low temperature working temperature limit value of the evaporator 1, and the third preset temperature is lower than the minimum value of the second preset temperature range. Specifically, the second preset temperature change value can be ±1°C, ±2°C, etc.

[0066] Preferably, in step S72, when the temperature of the evaporator 1 is within the second preset temperature range, the refrigerant flow of the first throttling element 2 is reduced at a first speed; in step S73, when the temperature of the evaporator 1 is lower than the minimum value of the second preset temperature range, the refrigerant flow of the first throttling element 2 is reduced at a second speed; the second speed is greater than the first speed, so that the temperature of the evaporator 1 increases as quickly as possible.

[0067] In a specific embodiment, the first throttling element 2 and the second throttling element 5 can be respectively selected from an electronic expansion valve or an adjustable opening valve, etc. Selecting the above throttling elements facilitates automatic control.

[0068] As another aspect of the present application, a laser light output stability management device is also proposed. Please continue to refer to Figure 3 The laser light output stability management device comprises an evaporator 1, a first throttling element 2, a compressor 3, a condenser 4 and a second throttling element 5 which are connected in sequence. The first throttling element 2 is located at the outlet side of the evaporator 1, and the second throttling element 5 is located at the inlet side of the evaporator 1. The refrigerant circulates in the evaporator 1, the first throttling element 2, the compressor 3, the condenser 4 and the second throttling element 5 in sequence, and the evaporator 1 performs heat exchange with the heat-generating components of the laser.

[0069] It can be understood that the management device increases the evaporation pressure in the evaporator 1 by adding a first throttling element 2 on the outlet side of the evaporator 1. When the temperature of the evaporator 1 is too low, the opening of the first throttling element 2 is closed to increase the evaporation pressure in the evaporator 1, thereby increasing the evaporation temperature or preventing the evaporation temperature from continuing to drop, thereby avoiding the evaporator 1 from being too low in temperature. This can improve the light output stability of the laser under low temperature and low load conditions, reduce the phenomenon of laser shutdown due to low temperature alarms, and broaden the low temperature adaptability of direct-cooled lasers.

[0070] In a specific embodiment, the laser light emission stability management device further includes a temperature sensor for detecting / monitoring the temperature of the evaporator 1 in real time.

[0071] In a specific embodiment, the laser light output stability management device further includes a first valve 6 and / or a second valve 7. The first valve 6 is connected in parallel with the compressor 3, and the second valve 7 is connected in parallel with the condenser 4. Figure 1 For example, the inlet side of the first valve 6 is connected to the outlet side of the compressor 3, and the outlet side of the first valve 6 is connected to the outlet side of the first throttling element 2. The first valve 6 is used to adjust the refrigerant flow rate on the outlet side of the compressor 3 to ensure that the refrigeration system can quickly adjust the cooling capacity in the evaporator in real time according to the light output power.

[0072] Please continue to refer to Figure 1 The inlet side of the second valve 7 is connected to the outlet side of the compressor 3, and the outlet side of the second valve 7 is connected to the inlet side of the second throttling element. The second valve 7 is used to adjust the refrigerant flow at the inlet and outlet sides of the condenser 4 to ensure that the refrigeration system quickly adjusts the refrigeration capacity in the evaporator in real time according to the optical power.

[0073] Preferably, the first valve 6 and the second valve 7 are respectively valves with adjustable opening or electronic expansion valves, which are convenient for automatic control.

[0074] It can be understood that when the light output power is lower than a preset value, the first valve 6 is opened to adjust the cooling capacity in the evaporator 1 quickly and timely; on the basis of the above, when the ambient temperature and / or the evaporation temperature is lower than the preset value, the second valve 7 is opened to further adjust the cooling capacity in the circuit. When the ambient temperature is lower than the preset value and the light output power is lower than a preset value, it is determined that the laser is in a low temperature and low load condition, and the laser light output stability management method of the present application is activated at this time to improve the light output stability of the laser under low temperature and low load conditions and reduce the phenomenon of laser shutdown due to low temperature alarm.

[0075] In a specific embodiment, the evaporator 1 is configured as a direct cooling plate with a refrigerant flow channel installed inside, and the heat-generating component of the laser is arranged in contact with the direct cooling plate, and heat exchange can be performed between the two. Generally speaking, the heat-generating component of the laser includes at least one of a pump source and an optical path module, but is not limited thereto. It can be understood that the heat-generating component of the laser also includes other functional components in the laser that generate heat and need to be dissipated.

[0076] In an embodiment of the present application, the number of refrigerant flow channels in the direct cooling plate is not limited to one, and may include one or more than two. The number of refrigerant inlets or outlets of the direct cooling plate is not limited to one, and may include one or more than two respectively.

[0077] Further preferably, the surface of the direct cooling plate is processed with spiral grooves for coiling the optical fiber and cooling the optical fiber. The optical fiber will emit heat during the transmission of the laser beam and is also a heating element.

[0078] In a specific embodiment, the condenser 4 includes a heat exchanger and a fan. The fan cools the heat exchanger by air. The heat exchanger may be a fin-tube heat exchanger or a microchannel heat exchanger.

[0079] For direct-cooled lasers, when the ambient temperature is low / the heat load demand of the laser is low, the temperature of the evaporator (i.e., direct cooling plate) that is fitted with its heat-generating components (such as pump source) is too low, which will affect the light output stability of the laser; and if the temperature of the evaporator (direct cooling plate) continues to drop, it may even cause the laser to shut down due to a low-temperature alarm. The technical solution of this application is adopted, that is, a first throttling element is set on the outlet side of the evaporator, and the working state of the first throttling element is controlled to control the working pressure in the direct cooling plate, thereby adjusting the refrigerant flow in the evaporator, and finally ensuring that the temperature of the evaporator does not affect the normal light output of the laser, which greatly improves the low-temperature adaptability of the laser.

[0080] As another aspect of the present application, a laser light output stability management system is also proposed, please refer to Figure 4The management system includes a laser, a chiller and a controller. The chiller is connected to the direct cooling circuit of the laser through a pipeline. The controller is arranged inside the laser to execute the laser light output stability management method in any of the above schemes.

[0081] The implementation of the embodiments of the present application will have the following beneficial effects: the laser light emission stability management method of the present application and the management device and management system proposed simultaneously increase the first throttling element on the outlet side of the evaporator. When the temperature of the evaporator is too low, the evaporation pressure in the evaporator is increased by closing the opening of the first throttling element, thereby increasing the evaporation temperature or preventing the evaporation temperature from continuing to drop, thereby avoiding the evaporator temperature from being too low. This can improve the light emission stability of the laser under low temperature and low load conditions, reduce the phenomenon of laser shutdown due to low temperature alarms, and broaden the low temperature adaptability of direct-cooled lasers.

[0082] The above-described embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be construed as limiting the scope of the patent application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent application shall be subject to the attached claims.

Claims

1. A method for managing the light output stability of a laser, wherein the laser comprises an evaporator, a compressor, a condenser and a second throttling element for forming a direct cooling circuit, wherein the direct cooling circuit is used for circulating a refrigerant, characterized in that: The direct cooling circuit further includes a first throttling element disposed between the evaporator and the compressor, the evaporator performs heat exchange with a heat generating component of the laser, and the management method includes the following steps: S1, obtaining the temperature of the evaporator; S2, obtaining the rotation speeds of the fans of the compressor and the condenser; S3. When the temperature of the evaporator is lower than the minimum value of the first preset temperature range, and the rotation speeds of the fans of the compressor and the condenser reach the minimum preset rotation speeds, the refrigerant flow rate of the first throttling element is reduced.

2. The management method according to claim 1, characterized in that: Also includes: When the temperature of the evaporator is greater than the maximum value of the first preset temperature range, increasing the speed of the compressor and / or increasing the speed of the fan of the condenser; When the temperature of the evaporator is within the first preset temperature range, controlling the direct cooling circuit to maintain a current state; When the temperature of the evaporator is lower than the minimum value of the first preset temperature range, and the speed of the compressor and / or the fan of the condenser is not at the minimum preset speed, the speed of the compressor and / or the speed of the fan of the condenser is lowered until the minimum preset speed.

3. The management method according to claim 1, characterized in that: Before S1, it also includes: obtaining the operating environment temperature and current optical output power of the laser, judging whether the laser is in a low temperature and low load condition, and starting the management method when the laser is in the low temperature and low load condition.

4. The management method according to claim 1, characterized in that: Lowering the refrigerant flow rate of the first throttling element includes: When the speeds of the fans of the compressor and the condenser are both at the minimum preset speed, it is determined whether the temperature of the evaporator is within a second preset temperature range, and the refrigerant flow of the first throttling element is adjusted according to the temperature of the evaporator.

5. The management method according to claim 4, characterized in that: When the temperature of the evaporator is within the second preset temperature range, the refrigerant flow rate of the first throttling element is reduced until the temperature change of the evaporator is maintained at the first preset temperature change value; When the temperature of the evaporator is lower than the minimum value of the second preset temperature range, the refrigerant flow of the first throttling element is reduced until the temperature of the evaporator changes within the second preset temperature change value and the temperature of the evaporator is higher than the third preset temperature.

6. The management method according to claim 5, characterized in that: When the temperature of the evaporator is within the second preset temperature range, reducing the refrigerant flow of the first throttling element at a first speed; When the temperature of the evaporator is lower than the minimum value of the second preset temperature range, the refrigerant flow of the first throttling element is reduced at a second speed.

7. The management method according to claim 6, characterized in that: The second speed is greater than the first speed.

8. The management method according to claim 1, characterized in that: The first throttling element and the second throttling element are respectively electronic expansion valves or valves with adjustable opening.

9. A laser light output stability management device, characterized in that: The management device includes an evaporator, a first throttling element, a compressor, a condenser and a second throttling element for forming a direct cooling circuit. The first throttling element is located on the outlet side of the evaporator, and the second throttling element is located on the inlet side of the evaporator. The refrigerant circulates in the evaporator, the first throttling element, the compressor, the condenser and the second throttling element in sequence, and the evaporator performs heat exchange with the heat-generating components of the laser.

10. A laser light output stability management system, characterized in that: The management system includes a laser, a chiller and a controller. The chiller is connected to a direct cooling circuit of the laser through a pipeline. The controller is arranged inside the laser to execute the management method according to any one of claims 1 to 8.

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