Cleaning device and cleaning method suitable for cooling liquid storage device and cooling system

Abstract

The invention provides a cleaning device suitable for a cooling liquid storage device, a cleaning method and a cooling system, and relates to the technical field of cleaning. The cleaning device comprises a main washing loop, a low-pressure washing branch, a high-pressure washing branch and a control module. The main flushing loop comprises a first detection module, a first pump, a filtering module, a temporary storage part and a second pump; the control module controls the first pump to convey the cooling liquid in the cooling liquid storage device from the filtering module to the temporary storage part, and when the pollution degree of the cooling liquid storage device is lower than or equal to a pollution preset value, the control module controls the second pump to convey the cooling liquid in the temporary storage part to the cooling liquid storage device from the low-pressure flushing branch; and when the pollution degree is higher than a pollution preset value, the first pump is controlled to continuously convey the cooling liquid to the temporary storage part for a preset duration, and then the second pump is controlled to convey the cooling liquid in the temporary storage part to the cooling liquid storage device from the high-pressure washing branch, so that the technical problems of low cleanliness and high energy consumption are solved, and the technical effects of high cleanliness and low energy consumption are achieved.

Description

Technical Field

[0001] The present invention relates to the field of cleaning technology, and in particular to a cleaning device, a cleaning method and a cooling system suitable for a coolant storage device. Background Art

[0002] In immersion liquid-cooled server systems, the coolant storage device is the core component of the circulating cooling system, and its cleanliness is directly related to the server's operating efficiency and lifespan. However, over long-term operation, various contaminants accumulate within the coolant storage device, including metal particles (such as iron, copper, and aluminum), microbial growth products (such as bacteria and algae), and colloidal substances formed by chemical degradation. These contaminants not only degrade the coolant's performance but also cause serious corrosion and scaling problems in liquid-cooled servers.

[0003] However, the related cleaning devices for cleaning coolant storage devices have disadvantages such as low cleaning efficiency, low cleanliness, and high energy consumption. Summary of the Invention

[0004] The present invention provides a cleaning device, a cleaning method and a cooling system applicable to a coolant storage device, so as to at least solve the problems of low cleanliness and high energy consumption in the related art.

[0005] The present invention provides a cleaning device suitable for a coolant storage device, comprising: a main flushing circuit connected to the coolant storage device, the main flushing circuit comprising a first detection module, a first pump, a filtering module, a temporary storage part and a second pump connected in series; a low-pressure flushing branch connected to the coolant storage device and the second pump respectively; a high-pressure flushing branch connected to the coolant storage device and the second pump respectively and connected in parallel with the low-pressure flushing branch; a control module configured to control the first pump to transport the coolant in the coolant storage device to the temporary storage part via the filtering module, and when the first detection module detects that the contamination level of the coolant storage device is lower than or equal to a predetermined contamination value, control the second pump to transport the coolant in the temporary storage part to the coolant storage device via the low-pressure flushing branch, so as to flush the coolant storage device in a low-pressure flushing mode; and when the first detection module detects that the contamination level of the coolant storage device is higher than the predetermined contamination value, control the first pump to continuously transport the coolant to the temporary storage part for a predetermined period of time, and then control the second pump to transport the coolant in the temporary storage part to the coolant storage device via the high-pressure flushing branch, so as to flush the coolant storage device in a high-pressure flushing mode.

[0006] The present invention also provides a cleaning method for a cleaning device of a coolant storage device, comprising: controlling a first pump to transport the coolant in the coolant storage device to a temporary storage part via a filter module; when the first detection module detects that the contamination level of the coolant storage device is lower than or equal to a predetermined pollution value, controlling a second pump to transport the coolant in the temporary storage part to the coolant storage device via a low-pressure flushing branch, so as to flush the coolant storage device in a low-pressure flushing mode; when the first detection module detects that the contamination level of the coolant storage device is higher than the predetermined pollution value, controlling the first pump to continuously transport the coolant to the temporary storage part for a predetermined period of time, and then controlling the second pump to transport the coolant in the temporary storage part to the coolant storage device via a high-pressure flushing branch, so as to flush the coolant storage device in a high-pressure flushing mode.

[0007] The present invention also provides a cooling system, comprising: a coolant storage device storing coolant; and a cleaning device suitable for the coolant storage device as described above, connected to the coolant storage device.

[0008] According to an embodiment of the present invention, by setting a first pump, the coolant in the coolant storage device can be transported to the temporary storage part. By setting a first detection module, the contamination degree of the coolant storage device can be detected. By setting a filter module, the coolant can be filtered. By setting a second pump, the filtered coolant in the temporary storage part can be transported to the coolant storage device to flush the coolant storage device. By setting a low-pressure flushing branch and a high-pressure flushing branch, it is possible to more accurately choose to flush the coolant storage device in a low-pressure flushing mode or in a high-pressure flushing mode according to the contamination degree of the coolant storage device, so as to avoid the coolant storage device not being able to be cleaned more effectively in a single low-pressure flushing mode. In a single high-pressure flushing mode, the second pump is overloaded and resources are wasted, thereby solving the technical problems of low cleanliness and high energy consumption, and achieving the technical effects of high cleanliness and low energy consumption. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] In order to more clearly illustrate the embodiments of the present invention, the following is a brief introduction to the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0010] Figure 1 This is a diagram showing the working principle of the cleaning device provided in the first embodiment of the present invention.

[0011] Figure 2 This is a diagram showing the working principle of the cleaning device provided in the second embodiment of the present invention.

[0012] Figure 3 This is a diagram showing the working principle of the cleaning device provided in the third embodiment of the present invention.

[0013] Figure 4 This is a diagram showing the working principle of the cleaning device provided in the fourth embodiment of the present invention.

[0014] Figure 5 This is a diagram showing the working principle of the cleaning device provided in the fifth embodiment of the present invention.

[0015] Figure 6 This is a flow chart of a cleaning method provided by an embodiment of the present invention.

[0016] The above drawings include the following reference numerals:

[0017] A. Coolant storage device;

[0018] 1. Main flushing circuit; 11. First detection module; 111. Conductivity detector; 112. Turbidity sensor; 113. pH sensor; 12. First pump; 13. Filtration module; 131. Porous membrane; 132. Backwash branch; 133. First pressure sensor; 134. Ceramic filter element; 135. Resin adsorption layer; 136. Permanent magnetic separation barrel; 137. Stainless steel filter screen; 138. Backwash tank; 139. Backwash pump; 14. Temporary storage unit; 15. Second pump; 16. Second detection module; 17. Third valve; 18. Fourth valve.

[0019] 2. Low-pressure flushing branch; 21. First valve;

[0020] 3. High-pressure flushing branch; 31. Mounting bracket; 32. Nozzle; 33. Second valve;

[0021] 4. Control module;

[0022] 5. Drying module; 51. Gas source; 52. Heating wire; 53. Temperature sensor; 54. Seventh valve; 55. Third pressure sensor;

[0023] 6. Liquefaction module; 61. Condenser; 62. Collection bottle; 63. Fifth valve; 64. Sixth valve; 65. Purity detector; 66. Exhaust valve;

[0024] 7. Second pressure sensor;

[0025] 8. Flow meter;

[0026] 9. Humidity sensor;

[0027] 10. Liquid level sensor. DETAILED DESCRIPTION

[0028] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts shall fall within the scope of protection of the present invention.

[0029] It should be noted that the terms "center," "longitudinal," "transverse," "length," "width," "thickness," "upper," "lower," "front," "back," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like, indicating positions or relationships, are based on the positions or relationships shown in the accompanying drawings and are intended solely to facilitate and simplify the description of the present invention. They are not intended to indicate or imply that the devices or components referred to must have, be constructed, or operate in a specific orientation, and are therefore not to be construed as limiting the present invention. The terms "mounted," "connected," and "connected" should be broadly construed, and may include, for example, fixed, removable, or integral connections; mechanical or electrical connections; direct or indirect connections through an intermediary; and internal communication between two components. The terms "parallel," "perpendicular," and "equal" encompass the conditions described and conditions similar to the conditions described, provided that the range of the similar conditions is within an acceptable range of deviation, as determined by one of ordinary skill in the art taking into account the measurement in question and the errors associated with the measurement of the particular quantity (i.e., the limitations of the measurement system). For example, "parallel" includes both absolute parallelism and approximate parallelism, where the acceptable deviation range for approximate parallelism may be, for example, within 5°; "perpendicular" includes both absolute perpendicularity and approximate perpendicularity, where the acceptable deviation range for approximate perpendicularity may also be, for example, within 5°. "Equal" includes both absolute equality and approximate equality, where the acceptable deviation range for approximate equality may be, for example, that the difference between the two is less than or equal to 5% of either. Those skilled in the art will understand the specific meanings of the above terms in the present invention in specific circumstances.

[0030] In order to enable those skilled in the art to better understand the solutions of the present invention, the present invention is further described in detail below with reference to the accompanying drawings and specific implementation methods.

[0031] Figure 1 This is a diagram showing the working principle of the cleaning device provided in the first embodiment of the present invention.

[0032] like Figure 1As shown, an embodiment of the present invention provides a cleaning device suitable for a coolant storage device A. The cleaning device may include a main flushing circuit 1 , a low-pressure flushing branch 2 , a high-pressure flushing branch 3 and a control module 4 .

[0033] The main flushing circuit 1 can be connected to the coolant storage device A. The main flushing circuit 1 can include a first detection module 11, a first pump 12, a filter module 13, a temporary storage unit 14 and a second pump 15 connected in series. The coolant in the coolant storage device A can flow to the temporary storage unit 14 under the drive of the first pump 12. The coolant in the temporary storage unit 14 can flow back to the coolant storage device A under the drive of the second pump 15. The flow direction of the coolant can be Figure 1 Clockwise direction indicated by the arrow. The first detection module 11 can be located upstream of the filtration module 13, that is, the first detection module 11 can be used to detect coolant that has not been filtered, thereby more accurately reflecting the degree of contamination of the coolant storage device A. The filtration module 13 can be located upstream of the temporary storage portion 14, that is, the temporary storage portion 14 can be used to accommodate filtered coolant. The low-pressure flushing branch 2 can be connected to the coolant storage device A and the second pump 15 respectively. The high-pressure flushing branch 3 can be connected to the coolant storage device A and the second pump 15 respectively, and connected in parallel with the low-pressure flushing branch 2. The flushing pressures of the low-pressure flushing branch 2 and the high-pressure flushing branch 3 can be set as needed. The control module 4 can be electrically connected to the first detection module 11, the first pump 12, the filtration module 13, the temporary storage portion 14, and the second pump 15 respectively. The control module 4 can be used to control the first pump 12 to transport the coolant in the coolant storage device A to the temporary storage portion 14 via the filtration module 13. If the first detection module 11 detects that the contamination level of coolant storage device A is lower than or equal to the predetermined contamination value, the second pump 15 is controlled to deliver coolant from the temporary storage portion 14 via the low-pressure flushing branch 2 to the coolant storage device A, thereby flushing the coolant storage device A in low-pressure flushing mode. If the first detection module 11 detects that the contamination level of coolant storage device A is higher than the predetermined contamination value, the first pump 12 is controlled to continuously deliver coolant to the temporary storage portion 14 for a predetermined period of time, and then the second pump 15 is controlled to deliver coolant from the temporary storage portion 14 via the high-pressure flushing branch 3 to the coolant storage device A, thereby flushing the coolant storage device A in high-pressure flushing mode. The predetermined contamination value can be set as needed. The predetermined period of time can be represented by the approximate time required to drain all the coolant from the coolant storage device A into the temporary storage portion 14. In other words, after draining the coolant from the coolant storage device A, the high-pressure flushing branch 3 can be used to high-pressure flush the coolant storage device A.

[0034] According to an embodiment of the present invention, by providing a first pump 12, the coolant in the coolant storage device A can be transported to the temporary storage portion 14. By providing a first detection module 11, the contamination level of the coolant storage device A can be detected. By providing a filter module 13, the coolant can be filtered. By providing a second pump 15, the filtered coolant in the temporary storage portion 14 can be transported to the coolant storage device A to flush the coolant storage device A. By providing a low-pressure flushing branch 2 and a high-pressure flushing branch 3, it is possible to more accurately select whether to flush the coolant storage device A in a low-pressure flushing mode or in a high-pressure flushing mode according to the contamination level of the coolant storage device A, so as to avoid the inability to effectively clean the coolant storage device A in a single low-pressure flushing mode. In a single high-pressure flushing mode, the second pump 15 is overloaded and wastes resources, thereby solving the technical problem of low cleanliness and high energy consumption, and achieving the technical effect of high cleanliness and low energy consumption.

[0035] Figure 2 This is a diagram showing the working principle of the cleaning device provided in the second embodiment of the present invention.

[0036] like Figure 2 As shown, in some embodiments, the cleaning device may further include a drying module 5. The drying module 5 may be connected to the coolant storage device A. The drying module 5 may also be electrically connected to the control module 4. After flushing the coolant storage device A and draining the coolant from the coolant storage device A into the temporary storage portion 14 using the first pump 12, the drying module 5 may be used to supply heated inert gas to the coolant storage device A to dry the coolant storage device A. The completion of the flushing operation can be determined by detecting the duration of the low-pressure flushing mode or the high-pressure flushing mode. After the flushing operation is completed, the coolant from the coolant storage device A may be drained into the temporary storage portion 14 using the first pump 12. However, because the first pump 12 drains the coolant from the coolant storage device A by extraction, some coolant may remain on the inner wall of the coolant storage device A, resulting in incomplete cleaning. By providing the drying module 5, heated inert gas can be supplied to the coolant storage device A, which can carry the remaining coolant out of the coolant storage device A, thereby improving the cleaning effect.

[0037] Figure 3 This is a diagram showing the working principle of the cleaning device provided in the third embodiment of the present invention.

[0038] like Figure 3As shown, in some embodiments, the cleaning device may further include a liquefaction module 6. The liquefaction module 6 may be connected to the coolant storage device A and the second pump 15, respectively. The liquefaction module 6 may also be electrically connected to the control module 4. The inert gas may carry the residual coolant in the coolant storage device A into the liquefaction module 6. The liquefaction module 6 may liquefy the residual coolant. Driven by the second pump 15, the liquefied coolant flows into the main flushing circuit 1. Furthermore, the liquefied coolant may flow into the filter module 13 driven by the second pump 15, and flow to the temporary storage part 14 after being filtered by the filter module 13. By setting the liquefaction module 6 to be connected to the second pump 15, the residual coolant can be recovered to avoid pollution of the external environment and to avoid wasting the coolant.

[0039] Figure 4 This is a diagram showing the working principle of the cleaning device provided in the fourth embodiment of the present invention.

[0040] like Figure 4 As shown, in some embodiments, a second detection module 16 is further provided between the filter module 13 and the temporary storage unit 14. The second detection module 16 can be electrically connected to the control module 4. The second detection module 16 can be used to detect the degree of contamination of the coolant after being filtered by the filter module 13. The degree of contamination detected by the second detection module 16 can be compared with the degree of contamination detected by the first detection module 11 to determine whether the working state of the filter module 13 is normal, so as to maintain the filter module 13. Furthermore, it is also possible to determine whether the flushing operation is completed based on the degree of contamination detected by the second detection module 16. For example, when the degree of contamination detected by the second detection module 16 is less than or equal to the minimum degree of contamination, it is determined that the flushing operation is completed. The minimum degree of contamination can be set as required.

[0041] Furthermore, if Figure 4 As shown, in some embodiments, the high-pressure flushing branch 3 may include a mounting bracket 31 and a plurality of nozzles 32. The mounting bracket 31 may be connected to the second pump 15 and extend into the coolant storage device A. The mounting bracket 31 may be formed with a channel allowing the coolant to flow. The plurality of nozzles 32 are respectively installed in the coolant storage device A based on the mounting bracket 31. The nozzles 32 may be used to spray the coolant from the temporary storage portion 14 toward the inner wall of the coolant storage device A. Figure 4As shown, multiple nozzles 32 can be mounted on the top of the coolant storage device A. Furthermore, multiple nozzles 32 can also be mounted on the bottom or middle of the coolant storage device A. Different nozzles 32 have different spray angles, allowing spray to reach every location within the coolant storage device A. For example, the nozzles 32 can be rotatably mounted on the mounting bracket 31. By controlling the rotation of the nozzles 32, the spray angle of the nozzles 32 can be changed. Furthermore, the mounting bracket 31 can include a first portion connected to the second pump 15 and a second portion for mounting the multiple nozzles 32. The second portion can be rotatably connected to the first portion, driving the multiple nozzles 32 to rotate, further ensuring that the coolant is sprayed to every location within the coolant storage device A. The mounting bracket 31 and nozzles 32 can each be electrically connected to the control module 4, allowing them to rotate or spray coolant under the control of the control module 4. The control module 4 can control the operating pressure of the nozzles 32 to be between 0.3 MPa and 1 MPa, and maintain a fluctuation in the operating pressure of the nozzles 32 between -2% and 2%.

[0042] Furthermore, the low-pressure flushing branch 2 can form a coolant circulation loop with the main flushing circuit 1, flushing the coolant storage device A in a circulating flow of coolant. The flushing effect of the low-pressure flushing mode can be adjusted by controlling the coolant flow rate. Using the control module 4 to control the cleaning device to perform high-pressure or low-pressure flushing on the coolant storage device A can effectively improve cleaning efficiency without the need for manual intervention.

[0043] Figure 5 This is a diagram showing the working principle of the cleaning device provided in the fifth embodiment of the present invention.

[0044] like Figure 5 As shown, the control module is not shown. In some embodiments, the low-pressure flushing branch 2 can be equipped with a second pressure sensor 7 and a flowmeter 8. The high-pressure flushing branch 3 can also be equipped with a second pressure sensor 7 and a flowmeter 8. The second pressure sensor 7 can be used to detect the pressure of the low-pressure flushing branch 2 and / or the high-pressure flushing branch 3, preventing pipe rupture in the low-pressure flushing branch 2 and / or the high-pressure flushing branch 3 due to excessive pressure, thereby improving cleaning safety and preventing low cleanliness due to insufficient pressure. The flowmeter 8 can be used to detect the flow rate of coolant in the low-pressure flushing branch 2 and / or the high-pressure flushing branch 3, thereby controlling the supply of coolant at a preset flow rate and preset pressure from the low-pressure flushing branch 2 and / or the high-pressure flushing branch 3 to the coolant storage device A. For example, in high-pressure flushing mode, the pressure of the high-pressure flushing branch 3 can be controlled to be maintained at approximately 15 MPa, and the flow rate of the high-pressure flushing branch 3 can be maintained at approximately 20 L / min. In addition, the flowmeter 8 can also be used to detect whether the second pump 15 is operating normally.

[0045] like Figure 5 As shown, in some embodiments, the low-pressure flushing branch 2 may be provided with a first valve 21. The first valve 21 may be used to allow or prevent coolant from flowing into the low-pressure flushing branch 2. When flushing the coolant storage device A in the low-pressure flushing mode, the first valve 21 may be kept open to allow coolant to flow into the low-pressure flushing branch 2. When flushing the coolant storage device A in the high-pressure flushing mode, the first valve 21 may be kept closed to prevent coolant from flowing into the low-pressure flushing branch 2.

[0046] like Figure 5 As shown, in some embodiments, the high-pressure flushing branch 3 may be provided with a second valve 33. The second valve 33 may be used to allow or prevent coolant from flowing into the high-pressure flushing branch 3. When flushing the coolant storage device A in the high-pressure flushing mode, the second valve 33 may be kept open to allow coolant to flow into the high-pressure flushing branch 3. When flushing the coolant storage device A in the low-pressure flushing mode, the second valve 33 may be kept closed to prevent coolant from flowing into the high-pressure flushing branch 3.

[0047] like Figure 5 As shown, in some embodiments, the coolant storage device A may also be connected to a liquid level sensor 10. The liquid level sensor 10 can be used to detect the coolant level within the coolant storage device A. For example, in high-pressure flushing mode, if the liquid level sensor 10 detects that the coolant level exceeds a predetermined level, the high-pressure flushing may be stopped and the high-pressure flushing mode may be re-entered after the coolant within the coolant storage device A is drained. The predetermined level can be set as needed.

[0048] like Figure 5 As shown, in some embodiments, a third valve 17 may be provided between the first pump 12 and the coolant storage device A. The third valve 17 may be provided upstream of the first pump 12 to allow the first pump 12 to be repaired by closing the third valve 17 when the first pump 12 fails.

[0049] like Figure 5 As shown, in some embodiments, the temporary storage portion 14 may further be connected to a liquid level sensor 10. The liquid level sensor 10 may be used to monitor the liquid level of the coolant in the temporary storage portion 14 in real time.

[0050] like Figure 5 As shown, in some embodiments, the drying module 5 may include a gas source 51, a heating wire 52, a third pressure sensor 55, a temperature sensor 53, and a seventh valve 54. The gas source 51 may be used to provide an inert gas. The inert gas may be nitrogen. The heating wire 52 may be used to heat the inert gas. For example, the control module 4 may control the heating wire 52 to increase its temperature to 80°C at a rate of 5°C / min and maintain the heating wire 52 at 80°C to heat the inert gas.

[0051] The third pressure sensor 55 can be used to detect the pressure of the inert gas provided by the drying module 5 to the coolant storage device A. For example, when it is detected that the pressure exceeds 0.15 MPa, the supply of inert gas to the coolant storage device A can be stopped. The temperature sensor 53 can be used to detect the temperature of the inert gas provided by the drying module 5 to the coolant storage device A. When the temperature sensor 53 detects that the temperature of the inert gas exceeds a predetermined temperature, heating can be stopped. The predetermined temperature can be set as needed. By providing the third pressure sensor 55, the inert gas source 51 can be controlled to provide inert gas to the coolant storage device A more stably. For example, inert gas with a flow rate of 30 L / min can be continuously provided to the coolant storage device A for 10 minutes.

[0052] like Figure 5 As shown, in some embodiments, the coolant storage device A may also be connected to a liquid level sensor 10 and a humidity sensor 9. The humidity sensor 9 can be used to detect the humidity within the coolant storage device A. For example, when the drying module 5 is drying the coolant storage device A, if the humidity within the coolant storage device A is detected to be less than a predetermined humidity, the drying operation may be stopped. The predetermined humidity can be set as needed. For example, the predetermined humidity may be 5% RH. When the humidity within the coolant storage device A is detected to be less than 5% RH, the drying operation may be stopped.

[0053] like Figure 5 As shown, in some embodiments, the liquefaction module 6 may include a condenser 61 and a collection bottle 62. The condenser 61 may be connected to the coolant storage device A. The condenser 61 may include a 316L stainless steel housing. Ethylene glycol coolant may circulate outside the housing. The temperature range of the ethylene glycol coolant may be controlled between -10.5°C and -9.5°C. The flow rate of the ethylene glycol coolant may be controlled at 5 L / min, thereby condensing and liquefying more than 90% of the coolant vapor.

[0054] A fifth valve 63 may be provided between the condenser 61 and the coolant storage device A. When flushing the coolant storage device A, the fifth valve 63 may be closed to prevent coolant from flowing into the condenser 61. When drying the coolant storage device A, the fifth valve 63 may be opened to allow inert gas to carry residual coolant into the cooler. A collection bottle 62 may be connected to the condenser 61 and the second pump 15. The collection bottle 62 is used to collect the coolant liquefied by the condenser 61. The second pump 15 can transport the liquefied coolant to the filtration module 13. The coolant may also be discharged directly from the collection bottle 62 to an external waste liquid recovery device. The coolant may be a fluorinated liquid. A vent valve 66 may be provided at the top of the collection bottle 62. Inert gas may be discharged through the vent valve 66. Discharging the inert gas after liquefying the residual coolant prevents the inert gas from being carried along with the coolant during discharge, thereby preventing environmental contamination. A sixth valve 64 may be provided between the collection bottle 62 and the second pump 15 to allow or prevent the coolant from flowing from the collection bottle 62 to the filtration module 13. For example, before the inert gas is exhausted from the collection bottle 62, the sixth valve 64 may be closed. After the inert gas is exhausted from the collection bottle 62, the sixth valve 64 may be opened to allow the coolant to flow from the collection bottle 62 to the filtration module 13.

[0055] like Figure 5 As shown, in some embodiments, the liquefaction module 6 may further include a purity detector 65. The purity detector 65 may be connected to the collecting bottle 62. The purity detector 65 may be used to detect the purity of the coolant in the collecting bottle 62. When the purity is less than the preset purity, the coolant storage device A may be flushed again until the purity of the coolant is detected to reach the preset purity. The preset purity may be set as required. For example, the preset purity may be 98%. The purity detector 65 may be an infrared spectrometer probe to dynamically analyze the purity of the coolant. The sampling frequency of the infrared spectrometer probe may be 1 Hz, and the detection band may be 8 μm-12 μm.

[0056] like Figure 5 As shown, in some embodiments, the first detection module 11 may include at least one of a conductivity detector 111, a turbidity sensor 112, and a pH sensor 113. The second detection module 16 may include at least one of a conductivity detector 111, a turbidity sensor 112, and a pH sensor 113. Figure 5As shown, the first detection module 11 and the second detection module 16 can be equipped with a conductivity detector 111, a turbidity sensor 112, and a pH sensor 113. The conductivity detector 111 can be used to detect changes in electrolyte concentration in the coolant. By detecting electrolyte concentration, corrosion of liquid-cooled servers caused by excessive electrolyte concentration can be prevented. The turbidity sensor 112 can be used to detect suspended particulate matter in the coolant. By detecting suspended particulate matter in the coolant, wear of liquid-cooled servers caused by excessive suspended particulate matter can be prevented. The pH sensor 113 can be used to detect the pH of the coolant. By detecting the pH of the coolant, the ineffectiveness of coolant additives due to pH deviation (for example, a pH less than 6.5 or less than 8.5) can be prevented. Furthermore, the degree of contamination can be determined based on the detection results of the conductivity detector 111, the turbidity sensor 112, and / or the pH sensor 113. For example, if the first detection module 11 is a conductivity detector 111, the predetermined contamination value can be 500 μS / cm. If the detection value (i.e., conductivity) of the conductivity detector 111 is 600 μS / cm, the contamination level may be 600 μS / cm, and the high-pressure flushing mode can be used to flush the coolant storage device A. If the detection value of the conductivity detector 111 is 400 μS / cm, the contamination level may be 400 μS / cm, and the low-pressure flushing mode can be used to flush the coolant storage device A.

[0057] For example, when the first detection module 11 is a turbidity sensor 112, the predetermined contamination value may be 5. If the detection value (i.e., turbidity) of the turbidity sensor 112 is 4, the contamination level may be 4, and the coolant storage device A may be flushed using the low-pressure flushing mode. If the detection value of the turbidity sensor 112 is 6, the contamination level may be 6, and the coolant storage device A may be flushed using the high-pressure flushing mode.

[0058] For example, if the first detection module 11 is a pH sensor 113, the predetermined contamination value may be 0.5. The contamination level may be the difference between the detection value (i.e., pH) of the pH sensor 113 and 7. If the pH sensor 113 detects a pH of 6.5, the contamination level is 0.5, and the coolant storage device A can be flushed using the low-pressure flushing mode. If the pH sensor 113 detects a pH of 6, the contamination level is 1, and the coolant storage device A can be flushed using the high-pressure flushing mode.

[0059] Furthermore, if the first detection module 11 includes a conductivity detector 111, a turbidity sensor 112, and a pH sensor 113, a weighted decision can be made based on the detection results of the conductivity detector 111, the turbidity sensor 112, and the pH sensor 113. For example, the pollution level can be: 0.4 × conductivity + 0.3 × turbidity + 0.3 × |pH-7|. The predetermined pollution value can be: 0.4 × 500 μS / cm + 0.3 × 5 + 0.3 × 0.5.

[0060] like Figure 5 As shown, in some embodiments, the filtration module 13 may include a porous membrane 131. The pore size of the porous membrane 131 may be greater than or equal to 0.001 nanometers and less than or equal to 20 micrometers. For example, the porous membrane 131 may be a polytetrafluoroethylene (PTFE) membrane. The pore size of the porous membrane 131 may be 0.1 μm to filter nanoparticles.

[0061] like Figure 5 As shown, in some embodiments, the filtration module 13 may further include a first pressure sensor 133 and a backwash branch 132. The first pressure sensor 133 may be connected to the porous membrane 131. The first pressure sensor 133 may be used to detect the pressure value at both ends of the porous membrane 131. The backwash branch 132 may be connected to the porous membrane 131 to form a backwash circuit. When the pressure value exceeds a predetermined pressure value, the backwash branch 132 may provide a flushing liquid with a flow direction opposite to the flow direction of the coolant to the porous membrane 131 to backwash the porous membrane 131. The predetermined pressure value may be set as needed. When the pressure value exceeds the predetermined pressure value, it may indicate that the porous membrane 131 is clogged. For example, the predetermined pressure value may be 50 kPa. When a pressure value greater than 50 kPa is detected, a flushing liquid with a pressure of 0.8 MPa may be provided to the porous membrane 131 and flushed for 2 minutes.

[0062] like Figure 5 As shown, in some embodiments, the backwash branch 132 may include a backwash tank 138 and a backwash pump 139. The backwash tank 138 may be filled with a flushing liquid for backwashing the porous membrane 131. Driven by the backwash pump 139, the flushing liquid may flush the porous membrane 131 in a direction opposite to the flow direction of the coolant.

[0063] like Figure 5 As shown, in some embodiments, a fourth valve 18 may be provided between the temporary storage portion 14 and the porous membrane 131. The fourth valve 18 may be opened when the coolant in the coolant storage device A is being transferred to the temporary storage portion 14. When the backwash branch 132 is backwashing the porous membrane 131, the fourth valve 18 may be closed to prevent the flushing liquid from entering the temporary storage portion 14.

[0064] In some embodiments, the filtration module 13 may further include at least one of a stainless steel filter 137, a ceramic filter element 134, a resin adsorption layer 135, and a permanent magnetic separation barrel 136. The stainless steel filter 137 may have a pore size of 50 μm to intercept large impurities. The ceramic filter element 134 may have a pore size of 5 μm to adsorb colloidal particles. The resin adsorption layer 135 can be used to remove organic pollutants. The permanent magnetic separation barrel 136 can adsorb metal particles such as iron and nickel at a magnetic field strength of 0.5 T.

[0065] According to the present invention, by simultaneously providing a porous membrane 131, a stainless steel filter screen 137, a ceramic filter element 134, a resin adsorption layer 135, and a permanent magnetic separation barrel 136 in the filter module 13, the impurity removal rate of the coolant can reach 99.7%. Furthermore, the porous membrane 131, the stainless steel filter screen 137, the ceramic filter element 134, the resin adsorption layer 135, and the permanent magnetic separation barrel 136 are detachably mounted in the main flushing circuit 1, so that the porous membrane 131, the stainless steel filter screen 137, the ceramic filter element 134, the resin adsorption layer 135, and the permanent magnetic separation barrel 136 can be easily replaced.

[0066] Figure 6 This is a flow chart of a cleaning method provided by an embodiment of the present invention.

[0067] like Figure 6 As shown, an embodiment of the present invention further provides a cleaning method applicable to the cleaning device for the coolant storage device described above. The cleaning method may include the following steps S610 to S630.

[0068] In step S610 , the first pump is controlled to deliver the coolant in the coolant storage device to the temporary storage portion via the filter module.

[0069] In step S620, when the first detection module detects that the contamination level of the coolant storage device is lower than or equal to the predetermined contamination value, the second pump is controlled to transport the coolant in the temporary storage portion to the coolant storage device via the low-pressure flushing branch to flush the coolant storage device in the low-pressure flushing mode.

[0070] In step S630, when the first detection module detects that the contamination level of the coolant storage device is higher than the predetermined contamination value, the first pump is controlled to continuously deliver coolant to the temporary storage part for a predetermined period of time, and the second pump is controlled to deliver the coolant in the temporary storage part to the coolant storage device through the high-pressure flushing branch to flush the coolant storage device in the high-pressure flushing mode.

[0071] According to an embodiment of the present invention, the coolant in the coolant storage device can be transported to the temporary storage portion by controlling the first pump. The filtered coolant in the temporary storage portion can be transported to the coolant storage device by controlling the second pump to flush the coolant storage device. The contamination level of the coolant storage device obtained by the first detection module can be used to more accurately select whether to flush the coolant storage device in a low-pressure flushing mode or in a high-pressure flushing mode, so as to avoid the coolant storage device not being effectively cleaned in a single low-pressure flushing mode. In a single high-pressure flushing mode, the second pump is overloaded and resources are wasted, thereby achieving energy consumption optimization while ensuring the cleaning effect.

[0072] Furthermore, the cleaning method can be implemented by the aforementioned control module. The cleaning method can also include the drying operation, backwashing operation, liquefaction operation, purity detection operation, and other processing steps described in the above embodiments. The control module can predict the time required for the next cleaning based on historical cleaning data.

[0073] Embodiments of the present invention also provide a cooling system. The cooling system may include a coolant storage device and the aforementioned cleaning device suitable for use with the coolant storage device. The coolant storage device stores coolant. The cleaning device may be connected to the coolant storage device. The cleaning device may clean the coolant storage device using the aforementioned cleaning method, thereby improving the cooling efficiency of the cooling system.

[0074] The above is a detailed introduction to a cleaning device, a cleaning method, and a cooling system for a coolant storage device provided by the present invention. Specific examples are used herein to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only used to help understand the method of the present invention and its core concept. It should be pointed out that for ordinary technicians in this technical field, without departing from the principles of the present invention, the present invention can also be improved and modified in a number of ways, and these improvements and modifications also fall within the scope of protection of the embodiments of the present invention.

Claims

1. A cleaning device for a coolant storage device, characterized in that: include: A main flushing circuit connected to the coolant storage device, the main flushing circuit comprising a first detection module, a first pump, a filter module, a temporary storage unit and a second pump connected in series; a low-pressure flushing branch, connected to the coolant storage device and the second pump respectively; a high-pressure flushing branch, connected to the coolant storage device and the second pump respectively, and connected in parallel with the low-pressure flushing branch; a control module configured to control the first pump to deliver the coolant in the coolant storage device to the temporary storage portion via the filtration module, and, when the first detection module detects that the contamination level of the coolant storage device is lower than or equal to a predetermined contamination value, control the second pump to deliver the coolant in the temporary storage portion to the coolant storage device via the low-pressure flushing branch, so as to flush the coolant storage device in a low-pressure flushing mode; When the first detection module detects that the contamination level of the coolant storage device is higher than the predetermined contamination value, the first pump is controlled to continuously deliver the coolant to the temporary storage portion for a predetermined period of time, and the second pump is controlled to deliver the coolant in the temporary storage portion to the coolant storage device via the high-pressure flushing branch, so as to flush the coolant storage device in the high-pressure flushing mode.

2. The cleaning device for a coolant storage device according to claim 1, characterized in that: The high-pressure flushing branch includes: a mounting bracket connected to the second pump and extending into the coolant storage device; A plurality of nozzles are installed in the coolant storage device based on the mounting brackets, and the nozzles are configured to spray the coolant from the temporary storage portion toward the inner wall of the coolant storage device.

3. The cleaning device for a coolant storage device according to claim 1, characterized in that: The cleaning device also includes: a drying module, which is connected to the coolant storage device. After the coolant storage device is flushed and the coolant in the coolant storage device is discharged to the temporary storage part by using the first pump, the drying module is configured to provide heated inert gas to the coolant storage device to dry the coolant storage device.

4. The cleaning device for a coolant storage device according to claim 3, characterized in that: Also includes: The liquefaction module is connected to the coolant storage device and the second pump respectively. The inert gas carries the residual coolant in the coolant storage device into the liquefaction module. The liquefaction module liquefies the residual coolant. The liquefied coolant flows into the main flushing circuit under the drive of the second pump.

5. The cleaning device for a coolant storage device according to claim 4, characterized in that: The liquefaction module comprises: a condenser connected to the coolant storage device; A collecting bottle is connected to the condenser and the second pump, wherein the collecting bottle is configured to collect the cooling liquid liquefied by the condenser, and the second pump delivers the liquefied cooling liquid to the filtering module.

6. The cleaning device for a coolant storage device according to claim 5, characterized in that: The liquefaction module further includes: a purity detector connected to the collecting bottle, wherein the purity detector is configured to detect the purity of the coolant in the collecting bottle, and flush the coolant storage device again when the purity is less than a preset purity.

7. The cleaning device for a coolant storage device according to claim 1, characterized in that: The filtration module includes a porous membrane, wherein the pore size of the porous membrane is greater than or equal to 0.001 nanometers and less than or equal to 20 micrometers.

8. The cleaning device for a coolant storage device according to claim 7, characterized in that: The filtering module further includes: a first pressure sensor connected to the porous membrane, wherein the first pressure sensor is configured to detect pressure values ​​at both ends of the porous membrane; A backwash branch is connected to the porous membrane to form a backwash circuit. When the pressure value exceeds a predetermined pressure value, the backwash branch provides a flushing liquid with a flow direction opposite to that of the coolant to the porous membrane.

9. The cleaning device for a coolant storage device according to claim 1, characterized in that: The filter module includes at least one of a stainless steel filter screen, a ceramic filter element, a resin adsorption layer and a permanent magnetic separation barrel.

10. The cleaning device for a coolant storage device according to claim 1, characterized in that: A second detection module is further provided between the filter module and the temporary storage portion, and the second detection module is configured to detect the contamination degree of the coolant after being filtered by the filter module.

11. The cleaning device for a coolant storage device according to claim 10, characterized in that: The first detection module and / or the second detection module includes at least one of a conductivity detector, a turbidity sensor and a pH sensor.

12. The cleaning device for a coolant storage device according to claim 1, characterized in that: The low-pressure flushing branch and / or the high-pressure flushing branch include: a second pressure sensor configured to detect the pressure of the low-pressure flushing branch and / or the high-pressure flushing branch; A flow meter is configured to detect the flow rate of the coolant in the low-pressure flushing branch and / or the high-pressure flushing branch.

13. The cleaning device for a coolant storage device according to claim 2, characterized in that: The low-pressure flushing branch includes a first valve configured to allow or prevent the coolant from flowing into the low-pressure flushing branch; and / or The high-pressure flush branch includes a second valve configured to allow or prevent the coolant from flowing into the high-pressure flush branch.

14. A cleaning method for a cleaning device for a coolant storage device according to any one of claims 1 to 13, characterized in that: include: controlling the first pump to deliver the coolant in the coolant storage device to the temporary storage portion via the filter module; When the first detection module detects that the contamination level of the coolant storage device is lower than or equal to a predetermined contamination value, controlling the second pump to deliver the coolant in the temporary storage portion to the coolant storage device via the low-pressure flushing branch, so as to flush the coolant storage device in a low-pressure flushing mode; When the first detection module detects that the contamination level of the coolant storage device is higher than the predetermined contamination value, the first pump is controlled to continuously deliver the coolant to the temporary storage part for a predetermined period of time, and the second pump is controlled to deliver the coolant in the temporary storage part to the coolant storage device via the high-pressure flushing branch to flush the coolant storage device in the high-pressure flushing mode.

15. A cooling system, characterized in that: include: a coolant storage device storing coolant; A cleaning device suitable for a coolant storage device according to any one of claims 1 to 13, connected to the coolant storage device.

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