Cooling system, laser device, control method of a cooling system and related devices

Abstract

The application discloses a cooling system, a laser device, a control method of the cooling system and related devices, wherein the cooling system is applied to a device containing at least two devices to be cooled, the two devices to be cooled use cooling medium with temperature difference, the cooling system comprises a refrigeration unit and a water cooling unit, the water cooling unit comprises a chilled water pump and a main circulating pipeline, the chilled water pump and the two devices to be cooled are sequentially connected in the main circulating pipeline; wherein the inlet and outlet water ports of the first device to be cooled are connected in parallel with a first bypass pipeline, the first bypass pipeline is provided with a first valve; and / or the inlet and outlet water ports of the second device to be cooled are connected in parallel with a second bypass pipeline, the second bypass pipeline is provided with a second valve. The cooling system realizes the cooling of the two devices to be cooled only through one water cooling unit and one refrigeration unit, and the cooling demand of the two devices to be cooled for chilled water with different temperatures is met by controlling the opening degree of the first valve or the second valve.

Description

Technical Field

[0001] This invention relates to the field of laser equipment technology, and in particular to a cooling system. The invention also relates to a laser device, a control method for the cooling system, and related equipment. Background Technology

[0002] In recent years, with the advancement of technologies such as fiber lasers, high-power equipment, including fiber laser equipment, has been widely used in sheet metal cutting, welding, and other fields. Currently, the core component of high-power fiber laser equipment, the laser pump unit, generates a significant amount of heat during operation. To dissipate this heat, all kilowatt-level high-power fiber laser equipment requires a dedicated water chiller to cool the laser and laser head. However, because the cooling media used for the laser and the laser head have different temperatures, two separate chillers are typically selected for each to meet their cooling requirements. While this method achieves the desired cooling effect, it is inconvenient to install, operate, and maintain, and it is also costly and space-consuming. Summary of the Invention

[0003] In view of this, the purpose of the present invention is to provide a cooling system that meets the cooling medium requirements of the first and second devices to be cooled at different temperatures, while simplifying the structure, reducing costs, and minimizing space occupation.

[0004] Another object of the present invention is to provide a control method for a cooling system to meet the needs of a first device to be cooled and a second device to be cooled for cooling media at different temperatures.

[0005] To achieve the above objectives, the present invention provides the following technical solution:

[0006] A cooling system is applied to a device comprising at least a first device to be cooled and a second device to be cooled, the first device to be cooled and the second device to be cooled using a cooling medium having a temperature difference, the cooling system comprising: a refrigeration unit and a water cooling unit, the water cooling unit comprising: a chilled water pump and a main circulation pipeline, the main circulation pipeline being connected to an evaporation tank of the refrigeration unit, the evaporation tank being used to introduce chilled water into the main circulation pipeline;

[0007] Wherein: the chilled water pump, the first device to be cooled, and the second device to be cooled are connected in series in the main circulation pipeline;

[0008] The inlet and outlet of the first device to be cooled are connected to a first bypass pipe connected in parallel with the first device to be cooled, and a first valve for adjusting the flow rate of the first bypass pipe is provided in the first bypass pipe.

[0009] And / or, the inlet and outlet of the second device to be cooled are connected to a second bypass pipeline connected in parallel with the second device to be cooled, and a second valve for adjusting the flow rate of the second bypass pipeline is provided in the second bypass pipeline.

[0010] Preferably, in the above-described cooling system, the chilled water pump, the first device to be cooled, and the second device to be cooled are connected in series in the main circulation pipeline along the flow direction of the chilled water.

[0011] Preferably, in the above-described cooling system, the water cooling unit further includes a first temperature detection component disposed in the main circulation pipeline and located on the outlet side of the first device to be cooled, for detecting the outlet water temperature of the first device to be cooled.

[0012] Preferably, in the above-described cooling system, the water cooling unit further includes a second temperature detection component disposed in the main circulation pipeline and located on the outlet side of the second device to be cooled, for detecting the outlet water temperature of the second device to be cooled.

[0013] Preferably, in the above-described cooling system, the water cooling unit further includes a third temperature detection component disposed in the main circulation pipeline and located on the outlet side of the chilled water pump, for detecting the outlet water temperature of the evaporation tank.

[0014] Preferably, in the above-described cooling system, the refrigeration unit includes:

[0015] Refrigerant piping, wherein the refrigerant is used to flow refrigerant;

[0016] The compressor, condenser, throttling device, and evaporator tank are connected in series in the refrigerant pipeline along the flow direction of the refrigerant.

[0017] This application also provides a control method for a cooling system. Based on the cooling system described in any of the above claims, for a cooling system equipped with a first bypass pipe and a first valve, the control method is: adjusting the flow rate of chilled water flowing through the first device to be cooled by controlling the opening degree of the first valve.

[0018] Alternatively, for a cooling system equipped with a second bypass pipe and a second valve, the control method is to adjust the flow rate of chilled water flowing through the second device to be cooled by controlling the opening of the second valve.

[0019] Preferably, in the above control method, for a cooling system equipped with a first bypass pipe and a first valve, and where the first device to be cooled and the second device to be cooled are connected in series in the main circulation pipe along the flow direction of the chilled water, the control method of adjusting the flow rate of the chilled water flowing through the first device to be cooled by controlling the opening of the first valve includes:

[0020] If the outlet water temperature of the first device to be cooled is greater than the preset inlet water temperature of the second device to be cooled, then the opening of the first valve is reduced.

[0021] If the outlet water temperature of the first device to be cooled is less than the preset inlet water temperature of the second device to be cooled, then the opening of the first valve is increased.

[0022] If the outlet water temperature of the first device to be cooled is equal to the preset inlet water temperature of the second device to be cooled, then the opening of the first valve is kept unchanged.

[0023] Preferably, in the above control method, the preset inlet water temperature value is a preset temperature range value.

[0024] Preferably, in the above control method, for a cooling system equipped with a second bypass pipe and a second valve, and where the first device to be cooled and the second device to be cooled are connected in series in the main circulation pipe along the flow direction of the chilled water, the control method of adjusting the flow rate of the chilled water flowing through the second device to be cooled by controlling the opening of the second valve includes:

[0025] If the difference between the outlet water temperature of the second device to be cooled and the outlet water temperature of the first device to be cooled is greater than the preset temperature difference value, then the opening of the second valve is reduced.

[0026] If the difference between the outlet water temperature of the second device to be cooled and the outlet water temperature of the first device to be cooled is less than the preset temperature difference value, then the opening of the second valve is increased.

[0027] If the difference between the outlet water temperature of the second device to be cooled and the outlet water temperature of the first device to be cooled is equal to the preset temperature difference value, then the opening degree of the second valve is controlled to remain unchanged.

[0028] Compared with the prior art, the beneficial effects of the present invention are:

[0029] The cooling system provided in this application is applied to a device containing at least a first device to be cooled and a second device to be cooled. The first device to be cooled and the second device to be cooled use a cooling medium with a temperature difference. The cooling system includes a refrigeration unit and a water cooling unit. The water cooling unit includes a main circulation pipeline and a chilled water pump. The main circulation pipeline is connected to the evaporation tank of the refrigeration unit. The evaporation tank is used to introduce chilled water for cooling into the main circulation pipeline. The chilled water pump, the first device to be cooled, and the second device to be cooled are connected in series in the main circulation pipeline. The inlet and outlet of the first device to be cooled are connected to a first bypass pipeline connected in parallel with the first device to be cooled. A first valve for adjusting the flow rate of the first bypass pipeline is provided in the first bypass pipeline. And / or, the inlet and outlet of the second device to be cooled are connected to a second bypass pipeline connected in parallel with the second device to be cooled. A second valve for adjusting the flow rate of the second bypass pipeline is provided in the second bypass pipeline.

[0030] This cooling system achieves cooling for both the first and second devices using only a single water-cooling unit and a refrigeration unit. Within the water-cooling unit, the flow rate of chilled water passing through either the first or second device is adjusted by controlling the opening of a first or second valve, thereby controlling the heat absorption by the chilled water and meeting the cooling requirements of both devices for different chilled water temperatures. Furthermore, by using only one water-cooling unit and one refrigeration unit, compared to existing systems that use two separate water chillers to cool the first and second devices, the system simplifies the structure, facilitates installation, maintenance, and operation, reduces costs, and minimizes space requirements.

[0031] The present invention also provides a laser device, including a first device to be cooled and a second device to be cooled as described above, and the cooling system described above, wherein the first device to be cooled includes a laser, and the second device to be cooled includes a laser head.

[0032] The present invention also provides a controller, including a memory and a processor; wherein the memory is used to store a program; and the processor is used to execute the program to implement the various steps of the control method described above.

[0033] The present invention also provides a control system for a cooling device, including the controller described above.

[0034] The present invention also provides a storage medium having a computer program stored thereon, which, when executed by a processor, implements the various steps of the control method described above. Attached Figure Description

[0035] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0036] Figure 1 A schematic diagram of a cooling system provided in an embodiment of the present invention;

[0037] Figure 2 A schematic diagram of another cooling system provided in an embodiment of the present invention;

[0038] Figure 3 This is a schematic diagram of another cooling system provided in an embodiment of the present invention.

[0039] Among them, 1 is the main circulation pipeline, 2 is the chilled water pump, 3 is the pipeline switch valve, 4 is the third temperature detection component, 5 is the first valve, 6 is the first bypass pipeline, 7 is the first device to be cooled, 8 is the first temperature detection component, 9 is the second device to be cooled, 10 is the second temperature detection component, 11 is the second bypass pipeline, 12 is the second valve, 13 is the refrigerant pipeline, 14 is the compressor, 15 is the exhaust temperature detection component, 16 is the condenser, 17 is the condensation temperature detection component, 18 is the throttling component, 19 is the evaporator tank, and 20 is the intake air temperature detection component. Detailed Implementation

[0040] The core of this invention is to provide a cooling system that meets the needs of different devices for cooling media at different temperatures, while simplifying the structure, reducing costs, and minimizing space occupation.

[0041] The present invention also provides a control method for a cooling system that meets the requirements of different devices to be cooled for cooling media at different temperatures.

[0042] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0043] Please refer to Figures 1-3This invention provides a cooling system applied to a device comprising at least a first device to be cooled 7 and a second device to be cooled 9. The first device to be cooled 7 and the second device to be cooled 9 use a cooling medium with a temperature difference. The cooling system includes a refrigeration unit and a water-cooling unit. The water-cooling unit includes a main circulation pipeline 1, a chilled water pump 2, the first device to be cooled 7, and the second device to be cooled 9. The main circulation pipeline 1 is connected to an evaporation tank 19 of the refrigeration unit, and the evaporation tank 19 is used to supply chilled water to the main circulation pipeline 1. The chilled water pump 2... The first device to be cooled 7 and the second device to be cooled 9 are connected in series in the main circulation pipeline 1; wherein, the inlet and outlet of the first device to be cooled 7 are connected to a first bypass pipeline 6 connected in parallel with the first device to be cooled 7, and a first valve 5 for adjusting the flow rate of the first bypass pipeline 6 is provided in the first bypass pipeline 6; and / or, the inlet and outlet of the second device to be cooled 9 are connected to a second bypass pipeline 11 connected in parallel with the second device to be cooled 9, and a second valve 12 for adjusting the flow rate of the second bypass pipeline 11 is provided in the second bypass pipeline 11.

[0044] This cooling system achieves cooling for both the first device 7 and the second device 9 using only one water-cooling unit and one refrigeration unit. Within the water-cooling unit, the flow rate of chilled water passing through either the first device 7 or the second device 9 is adjusted separately by controlling the opening of the first valve 5 or the second valve 12, thereby controlling the heat absorption of the chilled water on either device and meeting the cooling requirements of the two devices for chilled water at different temperatures. Furthermore, by using only one water-cooling unit and one refrigeration unit, compared to existing systems that use two separate water chillers to cool the first device 7 and the second device 9, the system simplifies the structure, facilitates installation, maintenance, and operation, reduces costs, and minimizes space requirements.

[0045] Furthermore, in this embodiment, the chilled water pump 2, the first device to be cooled 7, and the second device to be cooled 9 are connected in series in the main circulation pipeline 1 along the flow direction of the chilled water. This arrangement is advantageous because the cooling water temperature required by the first device to be cooled 7 is lower than that required by the second device to be cooled 9, and the chilled water temperature increases as it absorbs heat from the devices to be cooled along its flow direction. Therefore, the chilled water pump 2, the first device to be cooled 7, and the second device to be cooled 9 are connected in series in the main circulation pipeline 1 along the flow direction of the chilled water. Specifically, the first device to be cooled 7 is the laser of the laser device, and the second device to be cooled 9 is the laser head of the laser device. The cooling water temperature used to cool the laser is approximately 25°C, while the cooling water temperature used to cool the laser head is room temperature, to meet the laser's requirement for low-temperature chilled water and the laser head's requirement for room-temperature chilled water, preventing condensation from occurring in the laser head. Of course, the first device to be cooled 7 and the second device to be cooled 9 can also be other components, and are not limited to the cases listed in this embodiment.

[0046] Specifically, such as Figure 1 As shown, in this embodiment, the water-cooling unit is only provided with a first bypass pipe 6 and a first valve 5, without a second bypass pipe 11 and a second valve 12. The two ends of the first bypass pipe 6 are respectively connected to the inlet and outlet of the first device to be cooled 7, and are connected in parallel with the first device to be cooled 7. The first bypass pipe 6 is provided with the first valve 5.

[0047] When the cooling system is working, the refrigeration unit performs refrigeration, the evaporation tank 19 absorbs heat through evaporation, and the chilled water flowing through the evaporation tank 19 is cooled. The chilled water pump 2 operates, driving the chilled water. The temperature of the chilled water exiting the chilled water pump 2 is determined by the refrigeration unit. Therefore, the temperature of the chilled water entering the first device to be cooled 7 is constant, meeting the temperature requirements of the first device to be cooled 7, specifically around 25°C. The chilled water flows in the main circulation pipe 1. One path flows through the first device to be cooled 7 to absorb heat, increasing the chilled water temperature. The other path flows through the first bypass pipe 6, merging with the chilled water flowing through the first device to be cooled 7 before flowing through the second device to be cooled 9, where the chilled water further absorbs heat and increases in temperature. Since the first bypass pipe 6 is connected in parallel with the first device to be cooled 7, the flow rate of the chilled water in the first bypass pipe 6 is adjusted by regulating the opening of the first valve 5, indirectly regulating the flow rate of the chilled water flowing through the first device to be cooled 7. When absorbing the same amount of heat from the first device to be cooled 7, if the flow rate of chilled water flowing through the first device to be cooled 7 increases, the outlet temperature of the chilled water after flowing out of the first device to be cooled 7 will rise less. Conversely, if the flow rate of chilled water decreases, the outlet temperature of the chilled water after flowing out of the first device to be cooled 7 will rise more. Since the chilled water from the first device to be cooled 7 enters the second device to be cooled 9, when the first valve 5 is closed, the outlet temperature of the first device to be cooled 7 is the inlet temperature of the second device to be cooled 9. Therefore, by adjusting the opening of the first valve 5, the outlet temperature of the first device to be cooled 7 can be indirectly adjusted, which is also the inlet temperature of the second device to be cooled 9. The inlet temperature of the second device to be cooled 9 is higher than that of the first device to be cooled 7. In this way, the different temperature requirements of the first device to be cooled 7 and the second device to be cooled 9 can be met. Taking a laser and a laser head as an example, this perfectly meets the laser's requirement for low-temperature chilled water and the laser head's requirement for room-temperature chilled water, thus preventing condensation in the laser head.

[0048] like Figure 1 As shown, this embodiment of the invention provides a control method for a cooling system based on the cooling system. For a cooling system equipped with a first bypass pipe 6 and a first valve 5, and where the first device to be cooled 7 and the second device to be cooled 9 are connected in series in the main circulation pipe 1 along the flow direction of the chilled water, the control method adjusts the flow rate of the chilled water flowing through the first device to be cooled 7 by controlling the opening degree of the first valve 5, thereby achieving the adjustment of the temperature of the cooling water flowing through the first device to be cooled 7 and the second device to be cooled 9.

[0049] Specifically, the control method is as follows:

[0050] If the outlet water temperature of the first device to be cooled 7 is greater than the preset inlet water temperature of the second device to be cooled 9, since the outlet water temperature of the first device to be cooled 7 is equivalent to the inlet water temperature of the second device to be cooled 9, it means that the inlet water temperature of the second device to be cooled 9 is greater than the preset inlet water temperature value. Then, the opening of the first valve 5 is reduced to increase the flow rate of chilled water through the first device to be cooled 7, thereby reducing the outlet water temperature of the first device to be cooled 7, which in turn reduces the inlet water temperature of the second device to be cooled 9 to reach the preset inlet water temperature value and meet the chilled water temperature requirements of the second device to be cooled 9.

[0051] If the outlet water temperature of the first device to be cooled 7 is less than the preset inlet water temperature of the second device to be cooled 9, it means that the inlet water temperature of the second device to be cooled 9 is less than the preset inlet water temperature. Then, the opening of the first valve 5 is increased to reduce the flow rate of chilled water through the first device to be cooled 7, thereby increasing the outlet water temperature of the first device to be cooled 7, which in turn increases the inlet water temperature of the second device to be cooled 9 to reach the preset inlet water temperature value and meet the chilled water temperature requirements of the second device to be cooled 9.

[0052] If the outlet water temperature of the first device to be cooled 7 is equal to the preset inlet water temperature of the second device to be cooled 9, it means that the inlet water temperature of the second device to be cooled 9 is equal to the preset inlet water temperature. Then, the opening of the first valve 5 is kept unchanged to meet the chilled water temperature requirement of the second device to be cooled 9.

[0053] This control method satisfies the cooling requirements of the first device to be cooled 7 and the second device to be cooled 9 for chilled water at different temperatures.

[0054] like Figure 2 As shown, in this embodiment, the water-cooling unit is provided with a first bypass pipe 6 and a first valve 5, as well as a second bypass pipe 11 and a second valve 12. The two ends of the first bypass pipe 6 are respectively connected to the inlet and outlet of the first device to be cooled 7, and are connected in parallel with the first device to be cooled 7. The first valve 5 is installed in the first bypass pipe 6. The two ends of the second bypass pipe 11 are respectively connected to the inlet and outlet of the second device to be cooled 9, and are connected in parallel with the second device to be cooled 9. The second valve 12 is installed in the second bypass pipe 11.

[0055] During operation, the refrigeration unit performs refrigeration, and the evaporation tank 19 absorbs heat through evaporation, cooling the chilled water flowing through it. The chilled water pump 2 operates, driving the chilled water. The temperature of the chilled water exiting the pump 2 is determined by the refrigeration unit; therefore, the temperature of the chilled water entering the first device to be cooled 7 remains constant, meeting the temperature requirements of the first device to be cooled 7, specifically around 25°C. The chilled water flows in the main circulation pipe 1. One path flows through the first device to be cooled 7, absorbing heat and increasing its temperature. The other path flows through the first bypass pipe 6, merging with the chilled water flowing through the first device to be cooled 7, and then splits into two paths. One path flows through the second device to be cooled 9, further absorbing heat and increasing its temperature. The other path flows through the second bypass pipe 11, merging with the chilled water flowing through the second device to be cooled 9, and then returns to the evaporation tank 19. Since the first bypass pipe 6 is connected in parallel with the first device to be cooled 7, the flow rate of chilled water in the first bypass pipe 6 is adjusted by regulating the opening of the first valve 5, thereby indirectly regulating the flow rate of chilled water flowing through the first device to be cooled 7. When the same amount of heat needs to be absorbed from the first device to be cooled 7, if the flow rate of chilled water flowing through the first device to be cooled 7 increases, the outlet temperature of the chilled water after flowing out of the first device to be cooled 7 will rise less; conversely, if the flow rate of chilled water decreases, the outlet temperature of the chilled water after flowing out of the first device to be cooled 7 will rise more. Since the chilled water exiting the first device to be cooled 7 enters the second device to be cooled 9, the outlet temperature of the first device to be cooled 7 is the inlet temperature of the second device to be cooled 9. By adjusting the opening of the first valve 5, the outlet water temperature of the first device to be cooled 7 can be indirectly adjusted, which also adjusts the inlet water temperature of the second device to be cooled 9. The inlet water temperature of the second device to be cooled 9 is higher than that of the first device to be cooled 7. In this way, the cooling water requirements of the first device to be cooled 7 and the second device to be cooled 9 at different temperatures are met. Taking a laser and a laser head as an example, this perfectly meets the laser's requirement for low-temperature chilled water and the laser head's requirement for room-temperature chilled water, thus preventing condensation from occurring in the laser head. Since the second bypass pipe 11 and the second device to be cooled 9 are connected in parallel, the second valve 12 can adjust the flow rate of the second bypass pipe 11, indirectly adjusting the flow rate through the second device to be cooled 9, thereby adjusting the cooling rate and cooling effect of the second device to be cooled 9. The greater the flow rate through the second device to be cooled 9, the smaller the temperature rise of the chilled water exiting the second device to be cooled 9, and vice versa.

[0056] like Figure 2 As shown, this embodiment of the invention provides a control method for the cooling system based on the cooling system. By controlling the opening degree of the first valve 5 and the second valve 12 to separately adjust the flow rate of the chilled water flowing through the first device to be cooled 7 and the second device to be cooled 9 in the cooling system, the temperature of the cooling water flowing through the first device to be cooled 7 and the second device to be cooled 9 can be adjusted.

[0057] Specifically, the control method is as follows:

[0058] If the outlet water temperature of the first device to be cooled 7 is greater than the preset inlet water temperature of the second device to be cooled 9, since the outlet water temperature of the first device to be cooled 7 is equivalent to the inlet water temperature of the second device to be cooled 9, it means that the inlet water temperature of the second device to be cooled 9 is greater than the preset inlet water temperature value. Then, the opening of the first valve 5 is reduced to increase the flow rate of chilled water through the first device to be cooled 7, thereby reducing the outlet water temperature of the first device to be cooled 7, which in turn reduces the inlet water temperature of the second device to be cooled 9 to reach the preset inlet water temperature value and meet the chilled water temperature requirements of the second device to be cooled 9.

[0059] If the outlet water temperature of the first device to be cooled 7 is less than the preset inlet water temperature of the second device to be cooled 9, it means that the inlet water temperature of the second device to be cooled 9 is less than the preset inlet water temperature. Then, the opening of the first valve 5 is increased to reduce the flow rate of chilled water through the first device to be cooled 7, thereby increasing the outlet water temperature of the first device to be cooled 7, which in turn increases the inlet water temperature of the second device to be cooled 9 to reach the preset inlet water temperature value and meet the chilled water temperature requirements of the second device to be cooled 9.

[0060] If the outlet water temperature of the first device to be cooled 7 is equal to the preset inlet water temperature of the second device to be cooled 9, it means that the inlet water temperature of the second device to be cooled 9 is equal to the preset inlet water temperature. Then, the opening of the first valve 5 is kept unchanged to meet the chilled water temperature requirement of the second device to be cooled 9.

[0061] This control method satisfies the cooling requirements of the first device to be cooled 7 and the second device to be cooled 9 for chilled water at different temperatures.

[0062] like Figure 1 and Figure 2 As shown, further, in this embodiment, in the above two control methods, the preset inlet water temperature value is a preset temperature range value, which is a temperature interval. Taking a laser and a laser head as an example, the preset temperature range value is preferably an ambient temperature range value to meet the laser head's requirement for a room-temperature cooling medium and prevent condensation from occurring in the laser head. When the inlet water temperature of the second device to be cooled 9 is greater than the maximum value of the preset temperature range value, the opening of the first valve 5 is reduced; when the inlet water temperature of the second device to be cooled 9 is less than the minimum value of the preset temperature range value, the opening of the first valve 5 is increased; when the inlet water temperature of the second device to be cooled 9 is within the preset temperature range value, the opening of the first valve 5 is kept unchanged. The ambient temperature range value is set according to the actual ambient temperature on site, and can be a range of 25℃ to 30℃. Of course, it can also be other ambient temperature ranges, and is not limited to the temperature values ​​listed in this embodiment.

[0063] like Figure 3 As shown, in this embodiment, the water-cooling unit is only provided with a second bypass pipe 11 and a second valve 12, and the first bypass pipe 6 and the first valve 5 are not provided. The two ends of the second bypass pipe 11 are respectively connected to the inlet and outlet of the second device to be cooled 9, and are connected in parallel with the second device to be cooled 9. The second bypass pipe 11 is provided with a second valve 12.

[0064] When the cooling system is working, the refrigeration unit performs refrigeration, the evaporation tank 19 absorbs heat through evaporation, and the chilled water flowing through the evaporation tank 19 is cooled. The chilled water pump 2 operates, driving the chilled water. The temperature of the chilled water exiting the chilled water pump 2 is determined by the refrigeration unit. Therefore, the temperature of the chilled water entering the first device to be cooled 7 is constant, meeting the temperature requirements of the first device to be cooled 7, specifically around 25°C. The chilled water flows in the main circulation pipe 1, absorbing heat as it flows through the first device to be cooled 7, increasing its temperature. It then splits into two paths: one flows through the second device to be cooled 9, where the chilled water further absorbs heat and increases in temperature; the other flows through the second bypass pipe 11, merging with the chilled water flowing through the second device to be cooled 9 before returning to the evaporation tank 19. Since the second bypass pipe 11 is connected in parallel with the second device to be cooled 9, the flow rate of the chilled water in the second bypass pipe 11 is adjusted by regulating the opening of the second valve 12, thereby indirectly regulating the flow rate of the chilled water flowing through the second device to be cooled 9. When the same amount of heat needs to be absorbed by the second device to be cooled 9, if the flow rate of chilled water flowing through the second device to be cooled 9 increases, the outlet temperature of the chilled water after flowing out of the second device to be cooled 9 will rise less. Conversely, if the flow rate of chilled water decreases, the outlet temperature of the chilled water after flowing out of the second device to be cooled 9 will rise more. Since the chilled water from the first device to be cooled 7 enters the second device to be cooled 9, the outlet temperature of the first device to be cooled 7 is the inlet temperature of the second device to be cooled 9. The inlet temperature of the first device to be cooled 7 is controlled by the refrigeration unit. When the heat output of the first device to be cooled 7 remains constant, the outlet temperature of the first device to be cooled 7 increases and then remains constant. That is, the inlet temperature of the second device to be cooled 9 remains constant, and the inlet temperature of the second device to be cooled 9 is higher than that of the first device to be cooled 7. In this way, the cooling water requirements of the first device to be cooled 7 and the second device to be cooled 9 at different temperatures are met. Taking a laser and a laser head as an example, this perfectly meets the laser's requirement for low-temperature chilled water and the laser head's requirement for room-temperature chilled water, thus preventing condensation in the laser head. Furthermore, the outlet water temperature of the second device to be cooled 9 is higher than the inlet water temperature of the second device to be cooled 9.

[0065] like Figure 3As shown, this embodiment of the invention provides a control method for a cooling system based on this cooling system. For a cooling system equipped with a second bypass pipe 11 and a second valve 12, and where the first device to be cooled 7 and the second device to be cooled 9 are sequentially connected in series in the main circulation pipe 1 along the flow direction of the chilled water, this control method adjusts the flow rate of the chilled water flowing through the second device to be cooled 9 in the cooling system by controlling the opening degree of the second valve 12. This achieves the adjustment of the cooling water temperature flowing through the first device to be cooled 7 and the second device to be cooled 9.

[0066] The specific control method is as follows:

[0067] If the difference between the outlet water temperature of the second device to be cooled 9 and the outlet water temperature of the first device to be cooled 7 is greater than the preset temperature difference value, since the outlet water temperature of the first device to be cooled 7 is the inlet water temperature of the second device to be cooled 9, that is, the difference between the outlet water temperature of the second device to be cooled 9 and the inlet water temperature of the second device to be cooled 9 is greater than the preset temperature difference value, it indicates that the temperature rise of the chilled water after flowing through the second device to be cooled 9 is large and the cooling effect is poor. This indicates that the flow rate of chilled water flowing through the second device to be cooled 9 is small. Therefore, the opening of the second valve 12 is reduced to decrease the flow rate of the second bypass pipe 11, thereby indirectly increasing the flow rate of chilled water flowing through the second device to be cooled 9 to meet the cooling requirements of the second device to be cooled 9.

[0068] If the difference between the outlet water temperature of the second device to be cooled 9 and the outlet water temperature of the first device to be cooled 7 is less than the preset temperature difference value, that is, the difference between the outlet water temperature of the second device to be cooled 9 and the inlet water temperature of the second device to be cooled 9 is less than the preset temperature difference value, it indicates that the temperature rise of the chilled water after flowing through the second device to be cooled 9 is small and the cooling is excessive. This indicates that the flow rate of the chilled water flowing through the second device to be cooled 9 is large. Therefore, the opening of the second valve 12 is increased to increase the flow rate of the second bypass pipe 11, thereby indirectly reducing the flow rate of the chilled water flowing through the second device to be cooled 9 to meet the cooling requirements of the second device to be cooled 9.

[0069] If the difference between the outlet water temperature of the second device to be cooled 9 and the outlet water temperature of the first device to be cooled 7 is equal to the preset temperature difference value, it means that the temperature rise and cooling of the chilled water after flowing through the second device to be cooled 9 are normal. Therefore, it is not necessary to adjust the flow rate through the second device to be cooled 9, and it is also not necessary to adjust the opening of the second valve 12.

[0070] This control method satisfies the cooling requirements of the first device to be cooled 7 and the second device to be cooled 9 for chilled water at different temperatures.

[0071] As an optimization, in this embodiment, the preset temperature difference value is determined based on the normal heat generation of the second device to be cooled 9. If the heat generation is large, the preset temperature difference value will be larger under normal flow conditions, and vice versa. Preferably, the preset temperature difference value can be 2℃~5℃.

[0072] like Figures 1-3 As shown, in this embodiment, the water cooling unit further includes a first temperature detection component 8 disposed in the main circulation pipeline 1 and located on the outlet side of the first device to be cooled 7, for detecting the outlet water temperature of the first device to be cooled 7.

[0073] Specifically, such as Figure 1 and Figure 2 As shown, for a water-cooled unit equipped with a first bypass pipe 6, the first temperature detection component 8 is specifically installed in the main circulation pipe 1 and located between the outlet of the first bypass pipe 6 and the inlet of the second device to be cooled 9. This is to accurately detect the inlet water temperature of the second device to be cooled 9, taking into account the influence of the chilled water in the first bypass pipe 6.

[0074] like Figure 3 As shown, for a water-cooled unit without a first bypass pipe 6, the first temperature detection component 8 is specifically installed in the main circulation pipe 1 and located between the outlet of the first device to be cooled 7 and the inlet of the second device to be cooled 9. The influence of the chilled water in the first bypass pipe 6 does not need to be considered.

[0075] By setting up a first temperature detection component 8, the outlet water temperature of the first device to be cooled 7, which is also the inlet water temperature of the second device to be cooled 9, can be detected in real time, facilitating real-time control of the first valve 5 or the second valve 12. The first temperature detection component 8 can be a temperature sensor. Of course, the first temperature detection component 8 can also be omitted, and the outlet water temperature of the first device to be cooled 7 can be detected manually and periodically using a temperature detection instrument during actual operation.

[0076] Furthermore, in this embodiment, the water cooling unit also includes a second temperature detection component 10 disposed in the main circulation pipeline 1 and located on the outlet side of the second device to be cooled 9, for detecting the outlet water temperature of the second device to be cooled 9.

[0077] Specifically, such as Figures 1-3 As shown, the second temperature detection component 10 is specifically installed in the main circulation pipe 1, and is located between the outlet of the second device to be cooled 9 and the outlet of the second bypass pipe 11, so as to accurately detect the outlet water temperature of the second device to be cooled 9 and avoid the influence of the chilled water in the second bypass pipe 11. Of course, the second temperature detection component 10 can also be installed between the outlet of the second bypass pipe 11 and the inlet of the evaporation water tank 19, which can also qualitatively determine the magnitude of the outlet water temperature of the second device to be cooled 9 without hindering temperature control adjustment.

[0078] By setting a second temperature detection component 10, the outlet water temperature of the second device to be cooled 9 can be detected in real time, facilitating real-time control of the first valve 5 or the second valve 12. The second temperature detection component 10 can be a temperature sensor. Of course, the second temperature detection component 10 can also be omitted, and the outlet water temperature of the second device to be cooled 9 can be detected manually and periodically using a temperature detection instrument during actual operation.

[0079] like Figures 1-3 As shown, in this embodiment, the water cooling unit further includes a third temperature detection component 4 disposed in the main circulation pipeline 1 and located on the outlet side of the chilled water pump 2, for detecting the outlet water temperature of the evaporation tank 19.

[0080] By setting a third temperature detection component 4, the outlet water temperature of the evaporation tank 19 can be detected in real time, facilitating real-time control of the refrigeration unit and achieving precise control of the inlet water temperature of the first device to be cooled 7. The third temperature detection component 4 can be a temperature sensor. Of course, the third temperature detection component 4 can also be omitted, and in actual operation, the outlet water temperature of the evaporation tank 19, i.e., the inlet water temperature of the first device to be cooled 7, can be detected manually and periodically using a temperature detection instrument.

[0081] Furthermore, in this embodiment, the water cooling unit also includes a pipeline switch valve 3 disposed in the main circulation pipeline 1 and located on the outlet side of the chilled water pump 2, for controlling the total flow rate of chilled water in the main circulation pipeline 1.

[0082] In this embodiment, the first valve 5 and / or the second valve 12 are temperature-controlled valves or manual valves. By setting a temperature-controlled valve, the opening degree of the first valve 5 and / or the second valve 12 can be automatically controlled according to the temperature. Of course, the opening degree of the first valve 5 and / or the second valve 12 can also be manually controlled.

[0083] like Figures 1-3 As shown, this embodiment provides a specific refrigeration unit, which includes a refrigerant pipeline 13 and a compressor 14, a condenser 16, a throttling device 18 and an evaporator tank 19 connected in series along the flow direction of the refrigerant in the refrigerant pipeline 13. The refrigerant in the refrigerant pipeline 13 is used to flow the refrigerant.

[0084] The refrigeration unit is responsible for cooling the evaporator tank 19 to a suitable temperature. The working process of the refrigeration unit is as follows: the compressor 14 discharges high-temperature and high-pressure refrigerant gas, which passes through the condenser 16 and exchanges heat with the outdoor environment. The high-pressure liquid refrigerant in the condenser 16 is depressurized through the throttling device 18 and enters the evaporator tank 19, where it exchanges heat with the chilled water in the evaporator tank 19 and evaporates into low-pressure gaseous refrigerant. Then it enters the suction port of the compressor 14 and is compressed again, completing one cycle.

[0085] As an optimization, the throttling component 18 is an expansion valve, specifically an electronic expansion valve. Of course, it can also be other throttling components 18, and is not limited to the structure listed in this embodiment.

[0086] In this embodiment, the refrigeration unit further includes an exhaust temperature detection component 15, a condensation temperature detection component 17, and an intake temperature detection component 20 disposed in the refrigerant pipeline 13. The exhaust temperature detection component 15 is disposed on the outlet side of the compressor 14, the intake temperature detection component 20 is disposed on the inlet side of the compressor 14, and the condensation temperature detection component 17 is disposed on the outlet side of the condenser 16. These temperature detection components can accurately detect the refrigeration temperature in real time and can be used as temperature sensors.

[0087] Of course, based on the above embodiments, the refrigeration unit may also include a liquid receiver disposed in the refrigerant pipeline 13. The liquid receiver is disposed between the condenser 16 and the throttling component 18, and the liquid receiver buffers and compensates for the flow rate and pressure of the refrigerant in the refrigerant pipeline 13.

[0088] The present invention also provides a laser device, including a first device to be cooled 7 and a second device to be cooled 9 as described above, and the cooling system described above, wherein the first device to be cooled 7 includes a laser and the second device to be cooled 9 includes a laser head.

[0089] The present invention also provides a controller, including a memory and a processor. The memory may include high-speed RAM, non-volatile memory, or, for example, at least one disk storage device. The processor may be a central processing unit (CPU), an application-specific integrated circuit (ASIC), or one or more integrated circuits configured to implement embodiments of the present invention. The memory stores a program, and the processor executes the program to implement the various steps of the control method described above. Specifically, the program includes the control strategy for adjusting the opening of the first valve 5 and the second valve 12 involved in the control method described above. Optionally, the refined and extended functions of the program can be referred to the description above.

[0090] The present invention also provides a control system for a cooling device, including the controller described above. Specifically, the control system further includes a first valve 5 and a second valve 12, and the controller is connected to the first valve 5 and the second valve 12 to send control commands to the first valve 5 and the second valve 12 to realize the opening adjustment function of the first valve 5 and the second valve 12 involved in the above control method.

[0091] Furthermore, the control system also includes a temperature acquisition module, which can be used to acquire the outlet water temperature value of the first device to be cooled 7 and the outlet water temperature value of the second device to be cooled 9. The temperature acquisition module is connected to the controller, and the controller can implement the control strategy of adjusting the opening degree of the first valve 5 and the second valve 12 involved in the above control method based on the acquired temperature information.

[0092] The present invention also provides a storage medium storing a computer program thereon, which, when executed by a processor, implements the various steps of the control method described above. Specifically, the computer program includes a control strategy for adjusting the opening of the first valve 5 and the second valve 12 involved in the control method described above. Optionally, the refined and extended functions of the computer program can be referred to the description above.

[0093] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other.

[0094] The above description of the disclosed embodiments enables those skilled in the art to make or use the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A cooling system, characterized by, The application is applied to an equipment comprising at least a first device to be cooled and a second device to be cooled, the first device to be cooled and the second device to be cooled use cooling medium with temperature difference, the first device to be cooled needs lower temperature of cooling medium than the second device to be cooled, the cooling system comprises: a refrigeration unit and a water cooling unit, the water cooling unit comprises: a chilled water pump and a main circulation pipeline, the main circulation pipeline is communicated with an evaporative water tank of the refrigeration unit, the evaporative water tank is used for feeding chilled water into the main circulation pipeline; along the flow direction of the chilled water, the chilled water pump, the first device to be cooled and the second device to be cooled are sequentially connected in the main circulation pipeline; the water cooling unit further comprises a first temperature detection component arranged in the main circulation pipeline and located at the outlet side of the first device to be cooled, used for detecting the outlet water temperature of the first device to be cooled; the water cooling unit further comprises a third temperature detection component arranged in the main circulation pipeline and located at the outlet side of the chilled water pump, used for detecting the outlet water temperature of the evaporative water tank; wherein: the inlet and outlet of the first device to be cooled are communicated with a first bypass pipeline connected in parallel with the first device to be cooled, the first bypass pipeline is provided with a first valve used for adjusting the flow of the first bypass pipeline, the opening degree of the first valve is controlled to adjust the inlet water temperature of the second device to be cooled; and / or, the inlet and outlet of the second device to be cooled are communicated with a second bypass pipeline connected in parallel with the second device to be cooled, the second bypass pipeline is provided with a second valve used for adjusting the flow of the second bypass pipeline, the opening degree of the second valve is adjusted according to the difference between the outlet water temperature of the first device to be cooled and the preset inlet water temperature of the second device to be cooled. The water cooling unit further comprises a first temperature detection component arranged in the main circulation pipeline and located at the outlet side of the first device to be cooled, used for detecting the outlet water temperature of the first device to be cooled. The water cooling unit further comprises a second temperature detection component arranged in the main circulation pipeline and located at the outlet side of the second device to be cooled, used for detecting the outlet water temperature of the second device to be cooled. The water cooling unit further comprises a third temperature detection component arranged in the main circulation pipeline and located at the outlet side of the chilled water pump, used for detecting the outlet water temperature of the evaporative water tank. The refrigeration unit comprises: A refrigerant pipeline used for flowing refrigerant medium; 2. The cooling system of claim 1, wherein, A compressor, a condenser, a throttling component and an evaporative water tank, which are sequentially connected in the refrigerant pipeline along the flow direction of the refrigerant medium.

3. The cooling system of claim 2, wherein, The first device to be cooled and the second device to be cooled and the cooling system of any one of claims 1-5, wherein the first device to be cooled comprises a laser, and the second device to be cooled comprises a laser head.

4. The cooling system of claim 1, wherein, ​ 5. Cooling system according to any of claims 1-3, characterized in that ​ ​ ​ 6. A laser apparatus, characterized by comprising: ​ 7. A control method of a cooling system, characterized by, Based on the cooling system as described in any one of claims 1-5, for a cooling system provided with a first bypass pipe and a first valve, the control method is: adjusting the flow rate of chilled water flowing through the first device to be cooled by controlling the opening degree of the first valve; Alternatively, for a cooling system equipped with a second bypass pipe and a second valve, the control method is to adjust the flow rate of chilled water flowing through the second device to be cooled by controlling the opening of the second valve.

8. The control method according to claim 7, characterized by, For a cooling system equipped with a first bypass pipe and a first valve, and where the first device to be cooled and the second device to be cooled are connected in series in the main circulation pipe along the flow direction of the chilled water, the control method for adjusting the flow rate of chilled water through the first device to be cooled by controlling the opening of the first valve includes: If the outlet water temperature of the first device to be cooled is greater than the preset inlet water temperature of the second device to be cooled, then the opening of the first valve is reduced. If the outlet water temperature of the first device to be cooled is less than the preset inlet water temperature of the second device to be cooled, then the opening of the first valve is increased. If the outlet water temperature of the first device to be cooled is equal to the preset inlet water temperature of the second device to be cooled, then the opening of the first valve is kept unchanged.

9. The control method according to claim 8, characterized by, The preset inlet water temperature value is a preset temperature range value.

10. The control method according to claim 7, characterized by, For a cooling system equipped with a second bypass pipe and a second valve, and where the first device to be cooled and the second device to be cooled are connected in series in the main circulation pipe along the flow direction of the chilled water, the control method for adjusting the flow rate of chilled water through the second device to be cooled by controlling the opening of the second valve includes: If the difference between the outlet water temperature of the second device to be cooled and the outlet water temperature of the first device to be cooled is greater than the preset temperature difference value, then the opening of the second valve is reduced. If the difference between the outlet water temperature of the second device to be cooled and the outlet water temperature of the first device to be cooled is less than the preset temperature difference value, then the opening of the second valve is increased. If the difference between the outlet water temperature of the second device to be cooled and the outlet water temperature of the first device to be cooled is equal to the preset temperature difference value, then the opening degree of the second valve is controlled to remain unchanged.

11. A controller characterized by comprising: Including memory and processor; The memory is used to store programs; The processor is used to execute the program to implement the various steps of the control method as described in any one of claims 7-10.

12. A control system for a cooling device, characterized in that Includes the controller as described in claim 11.

13. A storage medium having stored thereon a computer program, characterized in that When the computer program is executed by the processor, it implements the various steps of the control method as described in any one of claims 7-10.

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