Laser cooling system

Abstract

The utility model belongs to the technical field of cooling, and particularly relates to a laser cooling system which comprises a liquid container, a refrigeration module, a laser cooling pipeline, a first water pump and a second water pump. The liquid container comprises a high-temperature area and a low-temperature area; a water inlet of the second water pump is connected with the low-temperature area of the liquid container, a water outlet of the second water pump is connected with the laser cooling pipeline, and a water outlet of the laser cooling pipeline is connected with the high-temperature area of the liquid container, so that high-temperature water formed after low-temperature water in the low-temperature area of the liquid container passes through the laser cooling pipeline is discharged to the high-temperature area of the liquid container; a water inlet of the first water pump is connected with the liquid container high-temperature area, a water outlet of the first water pump is connected with a water inlet of the refrigeration module, and a water outlet of the refrigeration module is connected with the liquid container low-temperature area, so that high-temperature water in the liquid container high-temperature area forms low-temperature water to be discharged to the liquid container low-temperature area after passing through the refrigeration module. Cooling efficiency can be improved, and energy consumption can be reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of cooling, and in particular relates to a laser cooling system. Background Art

[0002] When using a laser, a large amount of heat energy will be generated, causing the laser temperature to rise. If the temperature rises too high, it will cause abnormalities when the laser is used. Therefore, a device with a certain cooling capacity is required to cool the laser to meet the continuous use of the laser.

[0003] The cooling system of the related technology usually includes a liquid container, a water pump, and a heat exchanger. A circulating water flow is formed by the action of the water pump. The lower temperature water flows through the laser to take away the heat, so that the water temperature increases, thereby cooling the laser. The high temperature water flows through the heat exchanger and is converted into low temperature water and stored in the liquid container. The cooling efficiency of this cooling system is insufficient and the energy consumption is high. Utility Model Content

[0004] Therefore, the utility model provides a laser cooling system to solve the problems of insufficient cooling efficiency and high energy consumption of the current water cooling cycle.

[0005] The utility model adopts the following technical solutions:

[0006] The present invention provides a laser cooling system, comprising:

[0007] A liquid container, a refrigeration module, a laser cooling pipeline contained in the laser, a first water pump and a second water pump; the liquid container includes a high temperature area and a low temperature area;

[0008] The water inlet of the second water pump is connected to the low temperature zone of the liquid container, the water outlet of the second water pump is connected to the laser cooling pipeline, the water outlet of the laser cooling pipeline is connected to the high temperature zone of the liquid container, the second water pump pumps the coolant in the low temperature zone of the liquid container into the laser cooling pipeline, and the coolant flows into the high temperature zone of the liquid container after passing through the laser cooling pipeline;

[0009] The water inlet of the first water pump is connected to the high temperature zone of the liquid container, the water outlet of the first water pump is connected to the water inlet of the refrigeration module, the water outlet of the refrigeration module is connected to the low temperature zone of the liquid container, the first water pump pumps the coolant in the high temperature zone of the liquid container into the refrigeration module, and the coolant flows into the low temperature zone of the liquid container after passing through the refrigeration module.

[0010] Preferably, the high temperature zone is connected to the low temperature zone, and the laser cooling system further comprises:

[0011] an L-shaped liquid container partition disposed inside the liquid container;

[0012] The L-shaped liquid container partition is arranged in the middle of the liquid container. The long side of the L-shaped liquid container partition is arranged horizontally and the short side is arranged vertically, dividing the liquid container into two connected upper and lower parts. The upper part of the liquid container is a high temperature zone and the lower part of the liquid container is a low temperature zone.

[0013] Preferably, the thermal conductivity of the material of the L-shaped liquid container partition is less than or equal to a target value.

[0014] Preferably, the liquid container comprises a first sub-liquid container and a second sub-liquid container;

[0015] The first sub-liquid container serves as a high temperature zone, and the second sub-liquid container serves as a low temperature zone.

[0016] Preferably, the laser cooling system further comprises:

[0017] a communication pipeline connecting the first sub-liquid container and the second sub-liquid container;

[0018] The communication pipeline is arranged below a preset liquid level height of the liquid container.

[0019] Preferably, a pipeline switch is provided on the connecting pipeline.

[0020] Preferably, a through hole communicating with the atmosphere is provided on the high temperature zone of the liquid container, and / or a through hole communicating with the atmosphere is provided on the low temperature zone of the liquid container.

[0021] Preferably, the first water pump and / or the second water pump meets one of the following requirements:

[0022] Use plastic pump head;

[0023] or,

[0024] It adopts the combination of graphite pump head and filter element.

[0025] Preferably, when the first water pump and / or the second water pump adopts a combination of a graphite pump head and a filter element, the filter element is installed at any position of the pipeline after the water outlet of the water pump.

[0026] Preferably, the refrigeration module is a compressor, or a heat exchanger.

[0027] The utility model adopts the above technical solution, which has at least the following beneficial effects:

[0028] It can be understood that the technical solution shown in the utility model includes a liquid container, a refrigeration module, a laser cooling pipeline, a first water pump and a second water pump; the liquid container includes a high temperature zone and a low temperature zone; the water inlet of the second water pump is connected to the low temperature zone of the liquid container, the water outlet of the second water pump is connected to the laser cooling pipeline, and the water outlet of the laser cooling pipeline is connected to the high temperature zone of the liquid container, so that the low temperature water in the low temperature zone of the liquid container passes through the laser cooling pipeline to form high temperature water discharged to the high temperature zone of the liquid container; the water inlet of the first water pump is connected to the high temperature zone of the liquid container, the water outlet of the first water pump is connected to the water inlet of the refrigeration module, and the water outlet of the refrigeration module is connected to the low temperature zone of the liquid container, so that the high temperature water in the high temperature zone of the liquid container passes through the refrigeration module to form low temperature water discharged to the low temperature zone of the liquid container. In this way, by dividing the accommodation space inside the liquid container into a high temperature zone and a low temperature zone, it can help to control the temperature of the coolant in the liquid container, help to maintain the temperature of the coolant in the low temperature zone, and then cool the laser based on this, which can improve the cooling efficiency and reduce energy consumption.

[0029] It should be understood that the above general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the embodiments of the utility model 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 utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0031] Figure 1 It is a schematic block diagram of a laser cooling system shown in an exemplary embodiment of the utility model;

[0032] Figure 2 It is a schematic block diagram of a laser cooling system shown in another exemplary embodiment of the present utility model. DETAILED DESCRIPTION

[0033] In order to make the purpose, technical solution and advantages of the utility model clearer, the technical solution of the utility model will be described in detail below. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other implementation methods obtained by ordinary technicians in this field without creative work belong to the scope of protection of the utility model.

[0034] During the research process, the inventor discovered that the cooling system of the related technology uses a water tank with a continuous containing space inside, in which water flows freely and the temperature distribution is relatively uniform. During the operation of the cooling system, high-temperature water and low-temperature water exchange heat in the water tank, which to a certain extent reduces the cooling effect of the refrigeration module in the cooling system. The refrigeration efficiency of the refrigeration module is low and the energy consumption is high.

[0035] Based on this, the utility model provides a laser cooling system, which can improve the cooling efficiency for the laser and has low energy consumption.

[0036] Embodiment 1

[0037] Figure 1 is a schematic block diagram of a laser cooling system shown in an exemplary embodiment of the present utility model, see Figure 1 , providing a laser cooling system, comprising:

[0038] A liquid container 10, a refrigeration module 11, a laser cooling pipeline 12 included in the laser, a first water pump M1 and a second water pump M2; the liquid container 10 includes a high temperature area 101 and a low temperature area 102;

[0039] In specific practice, the coolant in the liquid container can be water, deionized water, ethylene glycol aqueous solution, etc. The laser cooling pipeline is a component of the laser.

[0040] The water inlet of the second water pump M2 is connected to the low temperature zone 102 of the liquid container, the water outlet of the second water pump M2 is connected to the laser cooling pipeline 12, and the water outlet of the laser cooling pipeline 12 is connected to the high temperature zone 101 of the liquid container; so that the high temperature water formed by the low temperature water in the low temperature zone 102 of the liquid container passing through the laser cooling pipeline 12 is discharged to the high temperature zone 101 of the liquid container.

[0041] The water inlet of the first water pump M1 is connected to the high temperature zone 101 of the liquid container, the water outlet of the first water pump M1 is connected to the water inlet of the refrigeration module 11, and the water outlet of the refrigeration module 11 is connected to the low temperature zone 102 of the liquid container; so that the high temperature water in the high temperature zone 101 of the liquid container passes through the refrigeration module 11 to form low temperature water to be discharged to the low temperature zone 102 of the liquid container.

[0042] It should be noted that the above-mentioned connections (such as the connection between the water inlet of the second water pump M2 and the low temperature zone 102 of the liquid container, and the connection between the water inlet of the first water pump M1 and the high temperature zone 101 of the liquid container) can be specifically connected through pipelines, and the material of the pipelines can be silicone tubes and / or PE (polyethylene) tubes.

[0043] It can be understood that during the operation of the laser cooling system provided by the embodiment of the utility model, the temperature of the coolant in the high temperature zone of the liquid container is higher than the temperature of the coolant in the low temperature zone.

[0044] It can be understood that, by applying the above technical solution shown in the embodiment of the utility model, the laser cooling pipeline flows out high-temperature coolant to the high-temperature zone of the liquid container, one water pump extracts high-temperature coolant from the high-temperature zone of the liquid container to cool the refrigeration module, and the cooled low-temperature coolant returns to the low-temperature zone of the liquid container, and another water pump extracts low-temperature coolant from the low-temperature zone to supply the laser cooling pipeline to cool the laser, and then the high-temperature coolant returns to the high-temperature zone of the liquid container. In this way, by dividing the storage space inside the liquid container into a high-temperature zone and a low-temperature zone, it can help to control the temperature of the coolant in the liquid container, help maintain the temperature of the coolant in the low-temperature zone, and then cool the laser based on this, thereby improving the cooling efficiency and achieving the effect of low energy consumption.

[0045] In some embodiments, the high temperature zone and the low temperature zone in the liquid container are connected, and the above laser cooling system further includes:

[0046] An L-shaped liquid container partition 103 disposed inside the liquid container 10;

[0047] The L-shaped liquid container partition 103 is arranged in the middle of the liquid container 10. The long side of the L-shaped liquid container partition 103 is arranged horizontally and the short side is arranged vertically, and is used to divide the liquid container 10 into two connected upper and lower parts. The upper part of the liquid container 10 is a high temperature zone 101, and the lower part of the liquid container 10 is a low temperature zone 102.

[0048] In specific practice, the L-shaped liquid container partition 103 is set in the middle of the liquid container 10. This position can be specifically set according to actual conditions. It should be noted that the horizontal long side of the L-shaped liquid container partition 103 cannot contact the top of the liquid container at the highest, and the long side needs to leave a part of space with the top of the liquid container. The bottom of the vertical short side of the L-shaped liquid container partition 103 cannot contact the bottom of the liquid container, and the bottom of the vertical short side needs to leave a part of space with the bottom of the liquid container to ensure that the high temperature area is connected with the low temperature area.

[0049] In specific practice, the L-shaped liquid container partition 103 is not limited to Figure 1 The horizontal vertical shape can also be a partition similar to an L-shape, as long as the similarity with the L-shape reaches a similarity threshold. The long side of the L-shaped liquid container partition 103 is set horizontally, which usually refers to a direction parallel to the earth's surface. However, in different scenarios, horizontal may also refer to a direction parallel to other reference planes or axes, which needs to be set according to specific application conditions.

[0050] Preferably, the thermal conductivity of the material of the L-shaped liquid container partition 103 is less than or equal to the target value, for example, the target value may be 0.4W / (m·K), and the material of the L-shaped liquid container partition 103 may be a material with a low thermal conductivity such as polyethylene, polyvinyl chloride, stainless steel, etc. In this way, it is possible to prevent heat from being transferred too quickly from the high temperature area to the low temperature area, and the temperature of the coolant in the low temperature area is well maintained, thereby achieving temperature control of the coolant in the liquid container.

[0051] The embodiment of the utility model uses an L-shaped liquid container partition to divide the liquid container into a high temperature area and a low temperature area. Figure 1 The middle dotted line position 104 is the lower limit position of the L-shaped liquid container partition. The pumping pipe of the first water pump M1 is higher than the dotted line position 104. The purpose is to extract coolant from the high temperature area. The purpose of connecting the high temperature area and the low temperature area is to balance the internal pressure and make the internal pressure consistent. The low temperature area is below the liquid container, and the high temperature area is above the liquid container. The purpose is to use the low density of the high temperature coolant and the high density of the low temperature coolant. When the high temperature coolant contacts the low temperature coolant, the high temperature coolant will be distributed on the top and the low temperature coolant will sink to the bottom. The diffusion speed of the two is the slowest, so as to separate the high and low temperature coolants.

[0052] In actual implementation, when water or plasma water is used as the coolant, the temperature of the low-temperature water can be greater than 4°C, because above 4°C, the higher the water temperature, the lower the density, and water with low density will float.

[0053] In some embodiments, one or more through holes connected to the atmosphere may be provided on the high temperature zone of the liquid container, and one or more through holes connected to the atmosphere may also be provided on the low temperature zone of the liquid container according to actual needs.

[0054] In some embodiments, the first water pump may adopt a plastic pump head, or may adopt a combination of a graphite pump head and a filter element. When the first water pump adopts a combination of a graphite pump head and a filter element, the filter element is installed at any position of the pipeline after the water outlet of the first water pump, such as at the water outlet of the first water pump. In this way, graphite powder or debris generated during the operation of the first water pump can be filtered.

[0055] The second water pump may adopt a plastic pump head, or may adopt a combination of a graphite pump head and a filter element. When the second water pump adopts a combination of a graphite pump head and a filter element, the filter element is installed at any position of the pipeline after the water outlet of the second water pump, such as at the water outlet of the second water pump. In this way, graphite powder or debris generated during the operation of the second water pump can be filtered.

[0056] In some embodiments, the outer shell of the liquid container may be made of stainless steel, polytetrafluoroethylene, polyethylene, polyvinyl chloride, etc.

[0057] In some embodiments, the refrigeration module may be a compressor, or a heat exchanger.

[0058] It can be understood that the advantage of this embodiment is that after the liquid container is divided into high and low temperature zones, high-temperature coolant can be extracted from the high-temperature zone to the refrigeration module, thereby improving the heat exchange efficiency. The refrigeration module can operate at the maximum cooling capacity with higher efficiency.

[0059] Take the above laser as a medical laser and the coolant as water as an example:

[0060] The heat generated by general laser medical equipment is generally 1-2kW. Calculated at 2kW, the water flow rate is 10L / min, and the volume of water flowing through the cooling module in M1 within 1 minute is 10L. Under a cooling power of 3kW, the water temperature rise can be calculated using the following formula:

[0061]

[0062] Where: ΔT 升 is the water temperature drop, P is the heating power 2kW = 2000J / s, t is 60s, C is the specific heat capacity of water, which is 4.2×10 3 J / kg / ℃, ρ is the water density, calculated as 1×103kg / m 3 calculate.

[0063] In this way, after passing through the laser, the temperature difference between low-temperature water and high-temperature water is 28.6°C.

[0064] The heat exchange type of water in the cooling module is heat conduction, and the heat conduction rate formula is as follows:

[0065] q=-k×A×(dT / dx)

[0066] Where k is thermal conductivity: the higher the thermal conductivity of a substance, the faster the heat transfer rate. Metals generally have higher thermal conductivity, while non-metals and gases have lower thermal conductivity.

[0067] A is the heat transfer area: the larger the heat transfer area, the higher the heat transfer rate. An increase in the heat transfer area means that more heat can pass through the material per unit time.

[0068] dT / dx is the temperature gradient: the greater the temperature gradient, the faster the heat conduction rate. The temperature gradient reflects the temperature change per unit distance. A large temperature gradient means that there is a large temperature difference inside the material, which drives faster heat transfer.

[0069] In this embodiment, the temperature difference between low-temperature water and high-temperature water is 28.6°C. M1 extracts high-temperature water and heat exchanges with the low-temperature coolant of the refrigeration module, which can provide heat exchange efficiency, thereby reducing the refrigeration capacity requirements of the refrigeration module. Generally speaking, the larger the refrigeration capacity, the larger the volume of the refrigeration module, and the greater the energy consumption. After reducing the refrigeration capacity requirements, a small-volume refrigeration module can be selected for refrigeration to achieve miniaturization and low energy consumption.

[0070] Embodiment 2

[0071] Figure 2 is a schematic block diagram of a laser cooling system shown in another exemplary embodiment of the present invention, see Figure 2 , the laser cooling system comprises:

[0072] A liquid container 10, a refrigeration module 11, a laser cooling pipeline 12 included in the laser, a first water pump M1 and a second water pump M2; the liquid container 10 includes a high temperature area 101 and a low temperature area 102;

[0073] In specific practice, the coolant in the liquid container can be water, deionized water, ethylene glycol aqueous solution, etc. The laser cooling pipeline is a component of the laser.

[0074] The water inlet of the second water pump M2 is connected to the low temperature zone 102 of the liquid container, the water outlet of the second water pump M2 is connected to the laser cooling pipeline 12, and the water outlet of the laser cooling pipeline 12 is connected to the high temperature zone 101 of the liquid container, so that the low temperature water in the low temperature zone 102 of the liquid container passes through the laser cooling pipeline 12 to form high temperature water, and the high temperature water is discharged to the high temperature zone 101 of the liquid container;

[0075] The water inlet of the first water pump M1 is connected to the high temperature zone 101 of the liquid container, the water outlet of the first water pump M1 is connected to the water inlet of the refrigeration module 11, and the water outlet of the refrigeration module 11 is connected to the low temperature zone 102 of the liquid container, so that the high temperature water in the high temperature zone 101 of the liquid container becomes low temperature water after passing through the refrigeration module 11, and the low temperature water is discharged to the low temperature zone 102 of the liquid container.

[0076] It should be noted that the above-mentioned connections (such as the connection between the water inlet of the second water pump M2 and the low temperature zone 102 of the liquid container, and the connection between the water inlet of the first water pump M1 and the high temperature zone 101 of the liquid container) can be specifically connected through pipelines, and the material of the pipelines can be silicone tubes and / or PE (polyethylene) tubes.

[0077] It can be understood that during the operation of the laser cooling system provided by the embodiment of the utility model, the temperature of the coolant in the high temperature zone of the liquid container is higher than the temperature of the coolant in the low temperature zone.

[0078] It should be noted that in Figure 2 In the embodiment, the liquid container comprises a first sub-liquid container 101 and a second sub-liquid container 102;

[0079] The first sub-liquid container serves as a high temperature zone, and the second sub-liquid container serves as a low temperature zone.

[0080] In this embodiment, the laser cooling system further includes:

[0081] A connecting pipe connecting the first sub-liquid container (high temperature zone) 101 and the second sub-liquid container (low temperature zone) 102;

[0082] The connecting pipeline is arranged below a preset liquid level.

[0083] It can be understood that, by applying the above technical solution shown in the embodiment of the utility model, the laser cooling pipeline flows out high-temperature coolant to the high-temperature zone of the liquid container, one water pump extracts high-temperature coolant from the high-temperature zone of the liquid container to cool the refrigeration module, and the cooled low-temperature coolant returns to the low-temperature zone of the liquid container, and another water pump extracts low-temperature coolant from the low-temperature zone to supply the laser cooling pipeline to cool the laser, and then the high-temperature coolant returns to the high-temperature zone of the liquid container. In this way, by separately setting the first sub-liquid container and the second sub-liquid container, the first sub-liquid container is used as the high-temperature zone and the second sub-liquid container is used as the low-temperature zone, which can help control the temperature of the coolant in the liquid container, help maintain the temperature of the coolant in the low-temperature zone, and then cool the laser based on this, thereby improving the cooling efficiency and achieving the effect of low energy consumption.

[0084] The liquid container high temperature zone 101 and / or the liquid container low temperature zone 102 are provided with through holes connected to the atmosphere. Preferably, the through holes can be opened at the top of the liquid container high temperature zone and the top of the liquid container low temperature zone.

[0085] In this embodiment, the first sub-liquid container may be provided with one or more through holes communicating with the atmosphere, and the second sub-liquid container may also be provided with one or more through holes communicating with the atmosphere according to actual needs.

[0086] It is understandable that the connecting pipe between the first sub-liquid container and the second sub-liquid container and the opening at the top of the liquid container in the high temperature zone or the low temperature zone to connect to the atmosphere can achieve the effect of balancing the air pressure.

[0087] In some embodiments, the first water pump may adopt a plastic pump head, or may adopt a combination of a graphite pump head and a filter element. When the first water pump adopts a combination of a graphite pump head and a filter element, the filter element is installed at any position of the pipeline after the water outlet of the first water pump, such as at the water outlet of the first water pump. In this way, graphite powder or debris generated during the operation of the first water pump can be filtered.

[0088] The second water pump may adopt a plastic pump head, or may adopt a combination of a graphite pump head and a filter element. When the second water pump adopts a combination of a graphite pump head and a filter element, the filter element is installed at any position of the pipeline after the water outlet of the second water pump, such as at the water outlet of the second water pump. In this way, graphite powder or debris generated during the operation of the second water pump can be filtered.

[0089] In some embodiments, the outer shell of the liquid container may be made of stainless steel, polytetrafluoroethylene, polyethylene, polyvinyl chloride, etc.

[0090] In some embodiments, the refrigeration module may be a compressor, or a heat exchanger.

[0091] If the refrigeration module is a heat exchanger, the type of the heat exchanger may be a plate heat exchanger or a spiral coil heat exchanger.

[0092] The above are only specific implementations of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed by the present invention, which should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

[0093] It can be understood that the same or similar parts of the above embodiments can be referenced to each other, and the contents not described in detail in some embodiments can refer to the same or similar contents in other embodiments.

[0094] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0095] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations of the present invention. Ordinary technicians in the field can change, modify, replace and modify the above embodiments within the scope of the present invention.

Claims

1. A laser cooling system, characterized in that: include: A liquid container, a refrigeration module, a laser cooling pipeline contained in the laser, a first water pump and a second water pump; the liquid container includes a high temperature area and a low temperature area; The water inlet of the second water pump is connected to the low temperature zone of the liquid container, the water outlet of the second water pump is connected to the laser cooling pipeline, the water outlet of the laser cooling pipeline is connected to the high temperature zone of the liquid container, the second water pump pumps the coolant in the low temperature zone of the liquid container into the laser cooling pipeline, and the coolant flows into the high temperature zone of the liquid container after passing through the laser cooling pipeline; The water inlet of the first water pump is connected to the high temperature zone of the liquid container, the water outlet of the first water pump is connected to the water inlet of the refrigeration module, the water outlet of the refrigeration module is connected to the low temperature zone of the liquid container, the first water pump pumps the coolant in the high temperature zone of the liquid container into the refrigeration module, and the coolant flows into the low temperature zone of the liquid container after passing through the refrigeration module.

2. The laser cooling system according to claim 1, characterized in that: The high temperature zone is connected to the low temperature zone, and the laser cooling system further includes: an L-shaped liquid container partition disposed inside the liquid container; The L-shaped liquid container partition is arranged in the middle of the liquid container. The long side of the L-shaped liquid container partition is arranged horizontally and the short side is arranged vertically, dividing the liquid container into two connected upper and lower parts. The upper part of the liquid container is a high temperature zone and the lower part of the liquid container is a low temperature zone.

3. The laser cooling system according to claim 2, characterized in that: The thermal conductivity of the material of the L-shaped liquid container partition is less than or equal to a target value.

4. The laser cooling system according to claim 1, characterized in that: The liquid container comprises a first sub-liquid container and a second sub-liquid container; The first sub-liquid container serves as a high temperature zone, and the second sub-liquid container serves as a low temperature zone.

5. The laser cooling system according to claim 4, characterized in that: Also includes: a communication pipeline connecting the first sub-liquid container and the second sub-liquid container; The communication pipeline is arranged below a preset liquid level height of the liquid container.

6. The laser cooling system according to claim 5, characterized in that: The connecting pipeline is provided with a pipeline switch.

7. The laser cooling system according to any one of claims 1 to 6, characterized in that: A through hole communicating with the atmosphere is provided on the high temperature zone of the liquid container, and / or a through hole communicating with the atmosphere is provided on the low temperature zone of the liquid container.

8. The laser cooling system according to any one of claims 1 to 6, characterized in that: The first water pump and / or the second water pump meets one of the following requirements: Use plastic pump head; or, It adopts the combination of graphite pump head and filter element.

9. The laser cooling system according to claim 8, characterized in that: When the first water pump and / or the second water pump adopts a combination of a graphite pump head and a filter core, the filter core is installed at any position of the pipeline after the water outlet of the water pump.

10. The laser cooling system according to any one of claims 1 to 5, characterized in that: The refrigeration module is a compressor or a heat exchanger.

Images