Heat dissipation system and laser device

Abstract

The present application relates to the technical field of laser, and especially relates to a heat dissipation system and a laser device. The heat dissipation system is used for dissipating heat for a laser, and the heat dissipation system comprises a refrigeration mode and a standby mode. The heat dissipation system comprises a compressor, a condenser, a cold plate and a functional device. The cold plate is used for cooling the laser. The functional device is used for throttling when the heat dissipation system is in the refrigeration mode, and is used for throttling and heat exchanging when the heat dissipation system is in the standby mode. The compressor, the condenser, the functional device and the cold plate are sequentially and circularly connected, and form a circulating loop of refrigerant. The laser device comprises the heat dissipation system. The present application provides a heat dissipation system and a laser device, so as to at least alleviate the technical problems that the cooling part of the laser is large in size, the cooling part is prone to condensation and frost when the laser is not started, and the compressor is prone to liquid compression damage.

Description

Technical Field

[0001] This invention relates to the field of laser technology, and more particularly to a heat dissipation system and a laser device. Background Technology

[0002] Lasers generate heat during operation, so their temperature must be controlled within a suitable range to ensure stable and reliable operation. Currently, laser heat dissipation methods generally include natural convection and large-channel water cooling. In natural convection, the laser's surface is extended, using natural heat dissipation to cool the laser chip. This method is convenient, but it requires high thermal conductivity of the laser surface material, and with the increasing use of high-power lasers, it is no longer sufficient. Large-channel water cooling employs forced convection, where a water-cooled plate is used to directly cool the laser. This method is characterized by its simple structure and excellent temperature dissipation.

[0003] However, in the process of realizing the present invention, the inventors found that there are at least the following technical problems in the prior art: the cooling components in the large channel water cooling method are generally large in size, which cannot meet the requirements of system miniaturization and portability. In addition, when the laser is not turned on, the laser is in standby mode, and the refrigerant is prone to condensation and frost on the cooling components, which shortens the service life. Moreover, liquid refrigerant is prone to enter the compressor, causing the compressor to be compressed with liquid and damaged.

[0004] Therefore, this application provides a new heat dissipation system and laser device to address the above-mentioned problems. Summary of the Invention

[0005] The purpose of this invention is to provide a heat dissipation system to at least alleviate the technical problems existing in the prior art, such as the large volume of the laser's cooling component, the easy condensation and frost formation on the cooling component when the laser is not turned on, and the easy damage to the compressor due to liquid compression.

[0006] The present invention also aims to provide a laser device to further alleviate the technical problems existing in the prior art, such as the large volume of the laser's cooling component, the easy condensation and frost formation on the cooling component when the laser is not turned on, and the easy damage to the compressor due to liquid compression.

[0007] Based on the aforementioned first objective, the present invention provides a heat dissipation system for dissipating heat from a laser, the heat dissipation system including a cooling mode and a standby mode;

[0008] The heat dissipation system includes a compressor, a condenser, a cold plate, and a functional device. The cold plate is used to cool the laser, and the functional device is used to throttle the heat dissipation system when it is in cooling mode, and to throttle and exchange heat when it is in standby mode.

[0009] The compressor, the condenser, the functional device, and the cold plate are connected in series to form a refrigerant circulation loop.

[0010] Furthermore, the functional device includes a throttling mechanism capable of throttling and a heat exchange mechanism capable of heat exchange.

[0011] Both the throttling mechanism and the heat exchange mechanism are connected between the condenser and the cold plate.

[0012] Furthermore, the throttling mechanism includes a first solenoid valve, a second solenoid valve, a first throttling unit, and a second throttling unit;

[0013] The first solenoid valve and the first throttling unit are connected in parallel to form a first passage, and the second solenoid valve and the second throttling unit are connected in parallel to form a second passage. The first passage, the heat exchange mechanism and the second passage are connected in series in sequence, and the first passage is close to the condenser.

[0014] Furthermore, the throttling mechanism includes a third throttling unit, a third solenoid valve, and a fourth solenoid valve;

[0015] The heat exchange mechanism is connected in series with the third solenoid valve and in parallel with the fourth solenoid valve to form a third passage. The third throttling unit and the third passage are connected in series, and the third throttling unit is close to the condenser.

[0016] Furthermore, the throttling mechanism includes a fourth throttling unit and a fifth throttling unit;

[0017] The fourth throttling unit is connected in series with the heat exchange mechanism and in parallel with the fifth throttling unit to form a fourth passage, which is connected between the condenser and the cold plate.

[0018] Furthermore, the throttling mechanism includes a sixth throttling unit and a seventh throttling unit;

[0019] The sixth throttling unit, the heat exchange mechanism, and the seventh throttling unit are connected in series to form a fifth passage. The fifth passage is connected between the condenser and the cold plate, and the sixth throttling unit is close to the condenser.

[0020] Furthermore, each throttling unit of the throttling mechanism is an electronic expansion valve, or each throttling unit of the throttling mechanism includes a capillary tube and an electric valve connected in series.

[0021] Furthermore, the heat dissipation system also includes a temperature sensor for detecting the temperature of the laser;

[0022] When the temperature sensor detects that the temperature of the laser reaches the preset cooling start temperature, the heat dissipation system starts the cooling mode; when the temperature sensor detects that the temperature of the laser reaches the preset cooling stop temperature, the heat dissipation system starts the standby mode; the preset cooling start temperature is greater than the preset cooling stop temperature.

[0023] Furthermore, when the temperature sensor detects that the temperature of the laser is lower than the preset cooling start-up temperature, the heat dissipation system switches to standby mode.

[0024] By adopting the above technical solution, the heat dissipation system of the present invention has at least the following beneficial effects:

[0025] In this heat dissipation system, the compressor, condenser, functional device and cold plate are connected in series to form a refrigerant circulation loop, so that the refrigerant can pass through the compressor, condenser, functional device and cold plate in sequence and then return to the compressor.

[0026] This heat dissipation system can be applied to lasers for heat dissipation, and also to other fields such as automotive batteries. The following explanation focuses on its application to lasers. In this configuration, when the heat dissipation system is used to cool the laser, the cold plate directly contacts the laser, thus improving the laser's heat dissipation efficiency. Furthermore, the laser device, composed of the cold plate and the laser, has a smaller unit size and greater portability, meeting the requirements for miniaturization and portability of laser equipment and alleviating the technical problem of large cooling components in existing laser technologies.

[0027] In addition, when the laser is started, it generates heat. The heat dissipation system is in cooling mode, and the cold plate absorbs the heat from the laser, achieving rapid cooling and ensuring that the laser operates within its normal temperature range. The heat dissipation system operates as follows: the compressor consumes electricity and performs work, producing a high-temperature, high-pressure gaseous refrigerant. After being liquefied by the condenser, it becomes a high-temperature, high-pressure liquid refrigerant. The functional device then throttles and reduces the pressure of the liquid refrigerant, transforming it into a low-temperature, low-pressure liquid refrigerant. This low-temperature, low-pressure liquid refrigerant flows through the cold plate, exchanging heat with the laser and absorbing its heat to cool it down.

[0028] When the laser is not activated, it does not generate heat, and the heat dissipation system is in standby mode. At this time, the cold plate becomes a passage for the refrigerant and does not change the temperature, pressure, or form of the refrigerant. The working process of the heat dissipation system at this time is as follows: The compressor consumes electricity to do work, and the high-temperature and high-pressure gaseous refrigerant is liquefied by the condenser after releasing heat, becoming a high-temperature and high-pressure liquid refrigerant. The functional device plays a role in throttling and heat exchange, so the high-temperature and high-pressure liquid refrigerant becomes a low-temperature and low-pressure liquid refrigerant after the throttling and pressure reduction effect of the functional device. After the heat exchange effect of the functional device, the low-temperature and low-pressure liquid refrigerant can absorb heat and vaporize into a low-temperature and low-pressure gaseous refrigerant. The low-temperature and low-pressure gaseous refrigerant flows through the cold plate and returns to the compressor.

[0029] With this configuration, the low-temperature, low-pressure liquid refrigerant in the heat dissipation system, after being throttled and depressurized, can absorb heat and vaporize through heat exchange, thereby increasing the temperature of the refrigerant and turning it into a gaseous refrigerant. As a result, when the refrigerant passes through the cold plate, it can prevent condensation and frost formation on the cold plate to a certain extent. Furthermore, the gaseous refrigerant entering the compressor will not cause the compressor to be compressed with liquid, thus extending the service life of the cold plate and the compressor. This alleviates the technical problems in the prior art where the cooling components are prone to condensation and frost formation when the laser is not running, and the compressor is prone to damage due to compression with liquid.

[0030] Based on the second objective mentioned above, the present invention provides a laser device, including a laser and the aforementioned heat dissipation system, wherein the cold plate of the heat dissipation system is used to dissipate heat from the laser.

[0031] By adopting the above technical solution, the laser device of the present invention has at least the following beneficial effects:

[0032] By incorporating the aforementioned heat dissipation system within the laser device, the laser device acquires all the advantages of the aforementioned heat dissipation system, which will not be elaborated upon here. Attached Figure Description

[0033] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0034] Figure 1 This is one of the structural schematic diagrams of a heat dissipation system provided in an embodiment of the present invention;

[0035] Figure 2 This is a second schematic diagram of the heat dissipation system provided in an embodiment of the present invention;

[0036] Figure 3 This is the third schematic diagram of the heat dissipation system provided in an embodiment of the present invention;

[0037] Figure 4 This is the fourth schematic diagram of the heat dissipation system provided in the embodiment of the present invention;

[0038] Figure 5 The fifth schematic diagram of the heat dissipation system provided in the embodiment of the present invention.

[0039] Figure label:

[0040] 1-Compressor;

[0041] 2-Condenser;

[0042] 3-Cold-rolled steel plate;

[0043] 4-Heat exchange mechanism;

[0044] 51-First solenoid valve; 52-Second solenoid valve; 53-Third solenoid valve; 54-Fourth solenoid valve;

[0045] 61-First throttling unit; 62-Second throttling unit; 63-Third throttling unit; 64-Fourth throttling unit; 65-Fifth throttling unit; 66-Sixth throttling unit; 67-Seventh throttling unit;

[0046] 611-First capillary tube; 612-First electric valve; 621-Second capillary tube; 622-Second electric valve;

[0047] 8-Condensing fan. Detailed Implementation

[0048] The technical solution of the present invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. 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.

[0049] In the description of this invention, it should be noted that the terms "upper," "lower," etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. Furthermore, the terms "first," "second," "third," "fourth," "fifth," "sixth," and "seventh" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0050] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0051] Example 1

[0052] Please see Figure 1 This embodiment provides a heat dissipation system for cooling a laser. The heat dissipation system includes a cooling mode and a standby mode. The heat dissipation system includes a compressor 1, a condenser 2, a cold plate 3, and a functional device. The cold plate 3 is used to cool the laser. The functional device is used to throttle the heat dissipation system when it is in cooling mode, and to throttle and exchange heat when it is in standby mode. The compressor 1, condenser 2, functional device, and cold plate 3 are connected in series to form a refrigerant circulation loop.

[0053] It should be noted that in this heat dissipation system, the refrigerant can pass through the compressor 1, condenser 2, functional device and cold plate 3 in sequence before returning to the compressor 1.

[0054] This heat dissipation system can be applied to lasers for heat dissipation, and can also be applied to other fields such as automotive batteries. The following explanation focuses on the application of the heat dissipation system to lasers. When the heat dissipation system is applied to a laser, the cold plate 3 directly contacts the laser to dissipate heat and lower its temperature, thus improving the heat dissipation efficiency of the laser. Furthermore, the laser device composed of the cold plate 3 and the laser has a smaller unit size and greater portability, meeting the requirements for miniaturization and portability of laser equipment, and alleviating the technical problem of large cooling components for lasers in existing technologies.

[0055] With this setup, when the laser is started, it generates heat, and the cooling system operates in cooling mode. The cold plate 3 absorbs this heat, achieving rapid cooling and ensuring the laser operates within its normal temperature range. The cooling system works as follows: the compressor 1 consumes electricity and produces a high-temperature, high-pressure gaseous refrigerant. This gaseous refrigerant is then liquefied by the condenser 2, becoming a high-temperature, high-pressure liquid refrigerant. The functional device then acts as a throttling device, reducing the pressure of the liquid refrigerant to a low-temperature, low-pressure liquid refrigerant. This low-temperature, low-pressure liquid refrigerant flows through the cold plate 3, exchanging heat with the laser and absorbing its heat to cool it down.

[0056] When the laser is not activated, it does not generate heat, and the heat dissipation system is in standby mode. At this time, the cold plate 3 becomes a passage for the refrigerant and does not change the temperature, pressure, or form of the refrigerant. The working process of the heat dissipation system at this time is as follows: The compressor 1 consumes electricity to do work, and the high-temperature and high-pressure gaseous refrigerant formed is liquefied by the condenser 2 after releasing heat, becoming a high-temperature and high-pressure liquid refrigerant. The functional device plays a role in throttling and heat exchange, so the high-temperature and high-pressure liquid refrigerant becomes a low-temperature and low-pressure liquid refrigerant after the throttling and pressure reduction effect of the functional device. After the heat exchange effect of the functional device, the low-temperature and low-pressure liquid refrigerant can absorb heat and vaporize into a low-temperature and low-pressure gaseous refrigerant. The low-temperature and low-pressure gaseous refrigerant flows through the cold plate 3 and returns to the compressor 1.

[0057] With this configuration, the low-temperature, low-pressure liquid refrigerant in the heat dissipation system, after being throttled and depressurized, can absorb heat and vaporize through heat exchange, thereby increasing the temperature of the refrigerant and turning it into a gaseous refrigerant. As a result, when the refrigerant passes through the cold plate 3, it can prevent condensation and frost formation on the cold plate 3 to a certain extent. Furthermore, the gaseous refrigerant entering the compressor 1 will not cause the compressor 1 to be compressed with liquid, thus extending the service life of the cold plate 3 and the compressor 1. This alleviates the technical problems in the prior art where the cold plate 3 is prone to condensation and frost formation and the compressor 1 is prone to damage due to liquid compression when the laser is not started.

[0058] Additionally, it should be noted that the laser's operation is not continuous and involves frequent start-stop cycles. When the laser is not working, it does not generate heat. The standby state of the unit can avoid damage caused by the frequent start-stop cycles of compressor 1 due to the instability of the laser's heat generation, and can also respond to the laser's cooling needs more quickly.

[0059] Optionally, in this embodiment, compressor 1 is a variable frequency compressor, which reduces the frequency of compressor 1 and decreases the cooling capacity when the laser is not working. Additionally, optionally, condenser 2 is a parallel flow condenser or a copper tube finned condenser.

[0060] Optionally, in this embodiment, the functional device includes a throttling mechanism that can perform throttling and a heat exchange mechanism 4 that can perform heat exchange. Both the throttling mechanism and the heat exchange mechanism 4 are connected between the condenser 2 and the cold plate 3.

[0061] The following examples illustrate several specific implementation methods of the throttling mechanism. It should be noted that each throttling unit mentioned in this embodiment refers to a valve that integrates a flow passage and a throttling passage. It can achieve three working states: flow passage, cut-off, and throttling. The throttling unit can selectively throttle and reduce the pressure of fluids such as refrigerant flowing through it, or not throttle and reduce the pressure (i.e., only allow the fluid to flow through).

[0062] As the first feasible method, please refer to Figure 1 and Figure 2In this embodiment, the throttling mechanism includes a first solenoid valve 51, a second solenoid valve 52, a first throttling unit 61, and a second throttling unit 62. The first solenoid valve 51 and the first throttling unit 61 are connected in parallel to form a first passage, and the second solenoid valve 52 and the second throttling unit 62 are connected in parallel to form a second passage. The first passage, the heat exchange mechanism 4, and the second passage are connected in series in sequence, and the first passage is close to the condenser 2.

[0063] When the heat dissipation system is in cooling mode, the first solenoid valve 51 and the second throttling unit 62 are open, and the second solenoid valve 52 and the first throttling unit 61 are closed; when the heat dissipation system is in standby mode, the second solenoid valve 52 and the first throttling unit 61 are open, and the first solenoid valve 51 and the second throttling unit 62 are closed.

[0064] With this setup, when the laser is started, the heat dissipation system is in cooling mode. The first solenoid valve 51 and the second throttling unit 62 are open, while the second solenoid valve 52 and the first throttling unit 61 are closed. At this time, the first throttling unit 61 acts as a cutoff, and the second throttling unit 62 acts as a throttling and pressure reduction. The first branch is open, the second branch is closed, the third branch is closed, and the fourth branch is open. Thus, the high-temperature and high-pressure liquid refrigerant output from the condenser 2 can flow sequentially through the first solenoid valve 51, the heat exchange mechanism 4, and the second throttling unit 62. At this time, the heat exchange mechanism 4 and the condenser 2 work together to release heat and liquefy the refrigerant. Thus, the heat exchange mechanism 4 outputs high-temperature and high-pressure liquid refrigerant. After being throttled and pressure-reduced by the second throttling unit 62, the high-temperature and high-pressure liquid refrigerant outputs low-temperature and low-pressure liquid refrigerant. Thus, the low-temperature and low-pressure liquid refrigerant flows through the cold plate 3 and can exchange heat with the laser, absorbing the heat of the laser and achieving cooling of the laser.

[0065] When the laser is not started, the heat dissipation system is in standby mode. The second solenoid valve 52 and the first throttling unit 61 are open, and the first solenoid valve 51 and the second throttling unit 62 are closed. At this time, the second throttling unit 62 acts as a cutoff, and the first throttling unit 61 acts as a throttling and pressure reduction. At this time, the first branch is closed, the second branch is open, the third branch is open, and the fourth branch is closed. Thus, the high-temperature and high-pressure liquid refrigerant output from the condenser 2 can flow sequentially through the first throttling unit 61, the heat exchange mechanism 4, and the second solenoid valve 52. At this time, the high-temperature and high-pressure liquid refrigerant output from the condenser 2 is throttled and pressure-reduced by the first throttling unit 61, and outputs a low-temperature and low-pressure liquid refrigerant. The low-temperature and low-pressure liquid refrigerant absorbs heat and vaporizes into a low-temperature and low-pressure gaseous refrigerant through the heat exchange mechanism 4. The low-temperature and low-pressure gaseous refrigerant flows through the second solenoid valve 52 and the cold plate 3 and returns to the compressor 1.

[0066] As a second possible approach, please refer to Figure 3In this embodiment, the throttling mechanism includes a third throttling unit 63, a third solenoid valve 53, and a fourth solenoid valve 54; the heat exchange mechanism 4 is connected in series with the third solenoid valve 53 and in parallel with the fourth solenoid valve 54 to form a third passage; the third throttling unit 63 and the third passage are connected in series, and the third throttling unit 63 is close to the condenser 2.

[0067] When the heat dissipation system is in cooling mode, the fourth solenoid valve 54 is open and the third solenoid valve 53 is closed; when the heat dissipation system is in standby mode, the fourth solenoid valve 54 is closed and the third solenoid valve 53 is open.

[0068] With this setup, when the laser is started, the heat dissipation system is in cooling mode, the fourth solenoid valve 54 is open, and the third solenoid valve 53 is closed. At this time, the sixth branch is open and the fifth branch is closed, so that the high-temperature and high-pressure liquid refrigerant output from the condenser 2 can flow through the third throttling unit 63 and the fourth solenoid valve 54 in sequence. At this time, the high-temperature and high-pressure liquid refrigerant output from the condenser 2 is throttled and depressurized by the third throttling unit 63, and outputs low-temperature and low-pressure liquid refrigerant. The low-temperature and low-pressure liquid refrigerant flows through the fourth solenoid valve 54 and then through the cold plate 3 to exchange heat with the laser, absorb the heat of the laser, and achieve the cooling of the laser.

[0069] When the laser is not started, the heat dissipation system is in standby mode, the fourth solenoid valve 54 is closed, the third solenoid valve 53 is open, the fifth branch is open, and the sixth branch is closed. Thus, the high-temperature and high-pressure liquid refrigerant output from the condenser 2 can flow sequentially through the third throttling unit 63, the heat exchange mechanism 4, and the third solenoid valve 53. At this time, the high-temperature and high-pressure liquid refrigerant output from the condenser 2 is throttled and depressurized by the third throttling unit 63, and outputs a low-temperature and low-pressure liquid refrigerant. The low-temperature and low-pressure liquid refrigerant absorbs heat and vaporizes into a low-temperature and low-pressure gaseous refrigerant through the heat exchange mechanism 4. The low-temperature and low-pressure gaseous refrigerant flows through the third solenoid valve 53 and the cold plate 3 and returns to the compressor 1.

[0070] As a third possible approach, please see Figure 4 In this embodiment, the throttling mechanism includes a fourth throttling unit 64 and a fifth throttling unit 65; the fourth throttling unit 64 is connected in series with the heat exchange mechanism 4 and is connected in parallel with the fifth throttling unit 65 to form a fourth passage, which is connected between the condenser 2 and the cold plate 3.

[0071] When the heat dissipation system is in cooling mode, the fifth throttling unit 65 is turned on and the fourth throttling unit 64 is turned off; when the heat dissipation system is in standby mode, the fifth throttling unit 65 is turned off and the fourth throttling unit 64 is turned on.

[0072] With this setup, when the laser is started, the heat dissipation system is in cooling mode, the fifth throttling unit 65 is open, and the fourth throttling unit 64 is closed. At this time, the fifth throttling unit 65 plays a role in throttling and reducing pressure, while the fourth throttling unit 64 plays a role in cutting off pressure. At this time, the eighth branch is open and the seventh branch is closed, so that the high-temperature and high-pressure liquid refrigerant output from the condenser 2 can flow through the fifth throttling unit 65. Under the throttling and pressure reduction of the fifth throttling unit 65, a low-temperature and low-pressure liquid refrigerant is output. The low-temperature and low-pressure liquid refrigerant then flows through the cold plate 3 to exchange heat with the laser, absorb the heat of the laser, and achieve the cooling of the laser.

[0073] When the laser is not started, the heat dissipation system is in standby mode. The fifth throttling unit 65 is closed and the fourth throttling unit 64 is open. At this time, the fourth throttling unit 64 plays the role of throttling and reducing pressure, and the fifth throttling unit 65 plays the role of cutting off. At this time, the eighth branch is closed and the seventh branch is open, so that the high-temperature and high-pressure liquid refrigerant output from the condenser 2 can flow through the fourth throttling unit 64 and the heat exchange mechanism 4 in sequence. At this time, the high-temperature and high-pressure liquid refrigerant output from the condenser 2 is throttled and reduced in pressure by the fourth throttling unit 64, and outputs low-temperature and low-pressure liquid refrigerant. The low-temperature and low-pressure liquid refrigerant absorbs heat and vaporizes into low-temperature and low-pressure gaseous refrigerant through the heat exchange mechanism 4. The low-temperature and low-pressure gaseous refrigerant flows through the cold plate 3 and returns to the compressor 1.

[0074] As a fourth possible method, please see Figure 5 In this embodiment, the throttling mechanism includes a sixth throttling unit 66 and a seventh throttling unit 67; the sixth throttling unit 66, the heat exchange mechanism 4 and the seventh throttling unit 67 are connected in series to form a fifth passage, which is connected between the condenser 2 and the cold plate 3, and the sixth throttling unit 66 is close to the condenser 2.

[0075] When the heat dissipation system is in cooling mode, the sixth throttling unit 66 is fully open; when the heat dissipation system is in standby mode, the seventh throttling unit 67 is fully open.

[0076] With this setup, when the laser is started, the heat dissipation system is in cooling mode. The sixth throttling unit 66 is fully open, acting as a flow channel, while the seventh throttling unit 67 acts as a throttling and pressure-reducing unit. Thus, the high-temperature, high-pressure liquid refrigerant output from the condenser 2 can flow sequentially through the sixth throttling unit 66 and the heat exchange mechanism 4 before reaching the seventh throttling unit 67. The heat exchange mechanism 4 outputs high-temperature, high-pressure liquid refrigerant. After being throttled and pressure-reduced by the seventh throttling unit 67, the high-temperature, high-pressure liquid refrigerant outputs low-temperature, low-pressure liquid refrigerant. This low-temperature, low-pressure liquid refrigerant then flows through the cold plate 3, enabling it to exchange heat with the laser, absorb the laser's heat, and achieve laser cooling.

[0077] When the laser is not started, the heat dissipation system is in standby mode. The seventh throttling unit 67 is fully open, which acts as a flow channel. The sixth throttling unit 66 acts as a throttling and pressure reduction channel. Thus, the high-temperature and high-pressure liquid refrigerant output from the condenser 2 can be throttled and pressure-reduced by the sixth throttling unit 66 to output a low-temperature and low-pressure liquid refrigerant. The low-temperature and low-pressure liquid refrigerant absorbs heat and vaporizes into a low-temperature and low-pressure gaseous refrigerant after passing through the heat exchange mechanism 4. The low-temperature and low-pressure gaseous refrigerant flows through the seventh throttling unit 67 and the cold plate 3 and then returns to the compressor 1.

[0078] Optionally, each throttling unit of the throttling mechanism is an electronic expansion valve, or each throttling unit of the throttling mechanism includes a capillary tube and an electric valve connected in series. This arrangement facilitates the automated control of the throttling unit.

[0079] For this configuration, please refer to the first implementation method. Figure 1 The first throttling unit 61 is an electronic expansion valve, and the second throttling unit 62 is an electronic expansion valve; or, please refer to [link to relevant documentation]. Figure 2 The first throttling unit 61 includes a first capillary tube 611 and a first electric valve 612 connected in series, and the second throttling unit 62 includes a second capillary tube 621 and a second electric valve 622 connected in series.

[0080] For the second implementation method, please refer to Figure 3 The third throttling unit 63 is an electronic expansion valve.

[0081] For the third implementation method, please refer to Figure 4 The fourth throttling unit 64 is an electronic expansion valve, and the fifth throttling unit 65 is an electronic expansion valve.

[0082] For the fourth implementation method, please refer to Figure 5 The sixth throttling unit 66 is an electronic expansion valve, and the seventh throttling unit 67 is an electronic expansion valve.

[0083] Optionally, in this embodiment, the heat exchange mechanism is a finned heat exchanger. In addition, the opening degree of each throttling unit of the throttling mechanism is controlled by the superheat of the intake air at the intake port of compressor 1.

[0084] Optionally, in this embodiment, the heat dissipation system further includes a temperature sensor (not shown in the figure), which is used to detect the temperature of the laser; when the temperature sensor detects that the temperature of the laser reaches a preset cooling start temperature, the heat dissipation system starts the cooling mode; when the temperature sensor detects that the temperature of the laser reaches a preset cooling stop temperature, the heat dissipation system starts the standby mode; the preset cooling start temperature is greater than the preset cooling stop temperature.

[0085] It should be noted that when the laser is started, its temperature gradually rises. When the temperature sensor detects that the laser temperature has risen to the preset cooling start temperature, the laser temperature is relatively high, reaching the highest point suitable for stable and reliable operation. At this time, the cooling system activates its cooling mode, allowing the cold plate 3 of the cooling system to absorb the laser's heat, achieving rapid cooling and ensuring the laser operates within its normal temperature range. Therefore, the laser temperature gradually decreases. When the temperature sensor detects that the laser temperature has dropped to the preset cooling stop temperature, the laser temperature is relatively low, reaching the lowest point suitable for stable and reliable operation. At this time, the cooling mode of the cooling system is turned off, and standby mode is activated. In this state, the cold plate 3 becomes a passageway for the refrigerant and does not change the temperature, pressure, or state of the refrigerant.

[0086] This setup uses a temperature sensor to detect the laser's temperature and automatically controls the cooling system to be in either cooling or standby mode. This keeps the laser's temperature between a preset cooling start temperature and a preset cooling stop temperature, ensuring that the laser operates stably and reliably within a suitable temperature range.

[0087] Alternatively, in this embodiment, when the temperature sensor detects that the temperature of the laser is lower than the preset cooling start temperature, the heat dissipation system switches to standby mode.

[0088] With this setup, when the temperature sensor detects that the laser's temperature is lower than the preset cooling start temperature, it means that the laser's temperature is not high, that is, the laser has not started generating heat. At this time, the heat dissipation system enters standby mode, so the cold plate 3 becomes a passage for the refrigerant and will not change the temperature, pressure, or form of the refrigerant.

[0089] Optionally, please see Figures 1-5 In this embodiment, a condenser fan 8 is provided on the condenser 2. The condenser fan 8 is a variable speed fan, which further reduces the energy consumption of the heat dissipation system.

[0090] Example 2

[0091] Example 2 provides a laser device, which includes the heat dissipation system of Example 1. The technical features of the heat dissipation system disclosed in Example 1 are also applicable to this example. The technical features of the heat dissipation system disclosed in Example 1 will not be described again.

[0092] The laser device provided in this embodiment includes a laser and the above-mentioned heat dissipation system. The cold plate 3 of the heat dissipation system is used to cool the laser. This laser device further alleviates the technical problems existing in the prior art, such as the large volume of the cooling component of the laser, the easy condensation and frost on the cold plate 3 when the laser is not turned on, and the easy damage to the compressor 1 due to liquid compression.

[0093] The laser device of this embodiment has the advantages of the heat dissipation system of Embodiment 1, which has been described in detail in Embodiment 1 and will not be repeated here.

[0094] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A heat dissipation system, characterized by, A heat dissipation system for dissipating heat of a laser, the heat dissipation system comprising a refrigeration mode and a standby mode; The heat dissipation system comprises a compressor (1), a condenser (2), a cold plate (3) and a functional device, the cold plate (3) is used for cooling the laser, the functional device comprises a throttling mechanism capable of throttling and a heat exchange mechanism (4) capable of heat exchange, the functional device is used for throttling when the heat dissipation system is in the refrigeration mode, and throttling and heat exchange when the heat dissipation system is in the standby mode; The compressor (1), the condenser (2), the functional device and the cold plate (3) are sequentially and circularly connected, forming a refrigerant circulation loop. When the laser is started, the heat dissipation system is in the refrigeration mode, when the laser is not started, the heat dissipation system is in the standby mode, and the heat dissipation system can be switched between the refrigeration mode and the standby mode. The throttling mechanism comprises a first electromagnetic valve (51), a second electromagnetic valve (52), a first throttling unit (61) and a second throttling unit (62); the first electromagnetic valve (51) and the first throttling unit (61) are connected in parallel to form a first passage, the second electromagnetic valve (52) and the second throttling unit (62) are connected in parallel to form a second passage, the first passage, the heat exchange mechanism (4) and the second passage are sequentially connected, and the first passage is close to the condenser (2); when the heat dissipation system is in the refrigeration mode, the first electromagnetic valve (51) and the second throttling unit (62) are opened, and the second electromagnetic valve (52) and the first throttling unit (61) are closed; when the heat dissipation system is in the standby mode, the second electromagnetic valve (52) and the first throttling unit (61) are opened, and the first electromagnetic valve (51) and the second throttling unit (62) are closed. Alternatively, the throttling mechanism comprises a sixth throttling unit (66) and a seventh throttling unit (67); the sixth throttling unit (66), the heat exchange mechanism (4) and the seventh throttling unit (67) are sequentially connected to form a fifth passage, the fifth passage is connected between the condenser (2) and the cold plate (3), and the sixth throttling unit (66) is close to the condenser (2); when the heat dissipation system is in the refrigeration mode, the sixth throttling unit (66) is fully opened; when the heat dissipation system is in the standby mode, the seventh throttling unit (67) is fully opened.

2. The heat dissipation system of claim 1, wherein, The throttling mechanism and the heat exchange mechanism (4) are both connected between the condenser (2) and the cold plate (3).

3. The heat dissipation system of claim 2, wherein, The throttling mechanism comprises a third throttling unit (63), a third electromagnetic valve (53) and a fourth electromagnetic valve (54); The heat exchange mechanism (4) is connected in series with the third electromagnetic valve (53) and is connected in parallel with the fourth electromagnetic valve (54) to form a third passage, the third throttling unit (63) and the third passage are connected in series, and the third throttling unit (63) is close to the condenser (2).

4. The heat dissipation system of claim 2, wherein, The throttling mechanism comprises a fourth throttling unit (64) and a fifth throttling unit (65); The fourth throttling unit (64) is connected in series with the heat exchange mechanism (4) and connected in parallel with the fifth throttling unit (65) to form a fourth passage, which is communicated between the condenser (2) and the cold plate (3).

5. The heat dissipation system according to any one of claims 1-4, wherein, Each throttling unit of the throttling mechanism is an electronic expansion valve, or each throttling unit of the throttling mechanism comprises a capillary tube and an electric valve connected in series.

6. The heat dissipation system of claim 1, wherein, The heat dissipation system further comprises a temperature sensor for detecting the temperature of the laser; When the temperature sensor detects that the temperature of the laser reaches a preset refrigeration start temperature, the heat dissipation system starts the refrigeration mode. When the temperature sensor detects that the temperature of the laser reaches a preset refrigeration stop temperature, the heat dissipation system starts the standby mode; the preset refrigeration start temperature is greater than the preset refrigeration stop temperature.

7. The heat dissipation system of claim 6, wherein, When the temperature sensor detects that the temperature of the laser is less than the preset refrigeration start temperature, the heat dissipation system starts the standby mode.

8. A laser apparatus, characterized by comprising: The heat dissipation system of any one of claims 1-7 is used for dissipating heat of a laser.

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