Cleaning device, cleaning method and cooling system suitable for a coolant storage device

Abstract

The application provides a cleaning device, a cleaning method and a cooling system suitable for a cooling liquid storage device, and relates to the technical field of cleaning. The cleaning device comprises a main flushing circuit, a low-pressure flushing branch, a high-pressure flushing branch and a control module; the main flushing circuit comprises a first detection module, a first pump, a filtering module, a temporary storage unit and a second pump; the control module controls the first pump to deliver the cooling liquid of the cooling liquid storage device from the filtering module to the temporary storage unit; when the pollution degree of the cooling liquid storage device is lower than or equal to a predetermined pollution value, the control module controls the second pump to deliver the cooling liquid in the temporary storage unit from the low-pressure flushing branch to the cooling liquid storage device; when the pollution degree is higher than the predetermined pollution value, the control module controls the first pump to continuously deliver the cooling liquid to the temporary storage unit for a predetermined time length, and then controls the second pump to deliver the cooling liquid in the temporary storage unit from the high-pressure flushing branch to the cooling liquid storage device, so that the technical problems of low cleaning degree and high energy consumption are solved, and the technical effects of high cleaning degree and low energy consumption are achieved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of cleaning, in particular to a cleaning device suitable for a cooling liquid storage device, a cleaning method and a cooling system. BACKGROUND

[0002] In an immersion liquid-cooled server system, the cooling liquid storage device is the core device of the circulating cooling system, and its cleanliness is directly related to the running efficiency and service life of the server. However, during long-term operation, various pollutants will accumulate inside the cooling liquid storage device, such as metal particles (such as iron, copper, aluminum, etc.), microbial metabolites (such as bacteria, algae), and colloidal substances formed by chemical degradation, etc. These pollutants not only reduce the performance of the cooling liquid, but also cause serious corrosion and fouling problems to the liquid-cooled server.

[0003] However, the related cleaning device for cleaning the cooling liquid storage device has the disadvantages of low cleaning efficiency, low cleanliness, high energy consumption, etc. SUMMARY

[0004] The present application provides a cleaning device suitable for a cooling liquid storage device, a cleaning method and a cooling system to at least solve the problems of low cleanliness and high energy consumption in the related art.

[0005] The present application provides a cleaning device suitable for a cooling liquid storage device, comprising: a main flushing circuit connected with the cooling liquid 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 with the cooling liquid storage device and the second pump respectively; a high-pressure flushing branch connected with the cooling liquid 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 cooling liquid in the cooling liquid storage device to the temporary storage part via the filtering module, in the case that the first detection module detects that the pollution degree of the cooling liquid storage device is lower than or equal to a pollution predetermined value, control the second pump to transport the cooling liquid in the temporary storage part to the cooling liquid storage device via the low-pressure flushing branch to flush the cooling liquid storage device in a low-pressure flushing mode; in the case that the first detection module detects that the pollution degree of the cooling liquid storage device is higher than the pollution predetermined value, control the first pump to continuously transport the cooling liquid to the temporary storage part for a predetermined time length, and then control the second pump to transport the cooling liquid in the temporary storage part to the cooling liquid storage device via the high-pressure flushing branch to flush the cooling liquid storage device in a high-pressure flushing mode.

[0006] The application further provides a cleaning method of the cleaning device suitable for the cooling liquid storage device, comprising: controlling the first pump to transport the cooling liquid in the cooling liquid storage device to the temporary storage through the filtering module; in the case that the first detection module detects that the pollution degree of the cooling liquid storage device is lower than or equal to the pollution predetermined value, controlling the second pump to transport the cooling liquid in the temporary storage to the cooling liquid storage device through the low-pressure flushing branch to flush the cooling liquid storage device in the low-pressure flushing mode; in the case that the first detection module detects that the pollution degree of the cooling liquid storage device is higher than the pollution predetermined value, after the first pump continuously transports the cooling liquid to the temporary storage for a predetermined time length, controlling the second pump to transport the cooling liquid in the temporary storage to the cooling liquid storage device through the high-pressure flushing branch to flush the cooling liquid storage device in the high-pressure flushing mode.

[0007] The application further provides a cooling system, comprising: a cooling liquid storage device storing cooling liquid; and the cleaning device suitable for the cooling liquid storage device as described above, connected with the cooling liquid storage device.

[0008] According to the embodiments of the application, the first pump is arranged to transport the cooling liquid in the cooling liquid storage device to the temporary storage. The first detection module is arranged to detect the pollution degree of the cooling liquid storage device. The filtering module is arranged to filter the cooling liquid. The second pump is arranged to transport the filtered cooling liquid in the temporary storage to the cooling liquid storage device to flush the cooling liquid storage device. The low-pressure flushing branch and the high-pressure flushing branch are arranged to select the flushing mode of the cooling liquid storage device in the low-pressure flushing mode or in the high-pressure flushing mode according to the pollution degree of the cooling liquid storage device, so as to avoid the low cleaning degree and high energy consumption in the single low-pressure flushing mode, and the overload operation of the second pump and the resource waste in the single high-pressure flushing mode, thereby solving the technical problems of low cleaning degree and high energy consumption, and achieving the technical effects of high cleaning degree and low energy consumption. BRIEF DESCRIPTION OF DRAWINGS

[0009] In order to more clearly illustrate the embodiments of the application, the drawings needed in the embodiments will be briefly introduced as follows. Obviously, the drawings in the following description are only some embodiments of the application, and other drawings can be obtained by those skilled in the art without creative labor.

[0010] Figure 1 The working principle diagram of the cleaning device provided for the first embodiment of the application.

[0011] Figure 2 The working principle diagram of the cleaning device provided for the second embodiment of the application.

[0012] Figure 3 The working principle diagram of the cleaning device provided by the third embodiment of the present application.

[0013] Figure 4 The working principle diagram of the cleaning device provided by the fourth embodiment of the present application.

[0014] Figure 5 The working principle diagram of the cleaning device provided by the fifth embodiment of the present application.

[0015] Figure 6 The flow chart of the cleaning method provided by the embodiment of the present application.

[0016] Among the above drawings, the following reference signs are included:

[0017] A, cooling liquid storage device;

[0018] 1, main flushing circuit; 11, first detection module; 111, electric conductivity detector; 112, turbidity sensor; 113, pH sensor; 12, first pump; 13, filtration module; 131, porous membrane; 132, backwashing branch; 133, first pressure sensor; 134, ceramic filter element; 135, resin adsorption layer; 136, permanent magnet separation barrel; 137, stainless steel filter screen; 138, backwashing tank; 139, backwashing 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] Clearly, the described embodiments are only a part of the embodiments of the present application, but not all the embodiments. Based on the embodiments of the present application, all the other embodiments obtained by a person of ordinary skill in the art without creative work fall within the protection scope of the present application.

[0029] It should be noted that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application. The terms "mounting", "connecting", "connecting" should be understood broadly, for example, it can be fixed connection, or detachable connection, or integral connection; it can be mechanical connection, or electrical connection; it can be direct connection, or indirect connection through intermediate medium, or internal communication of two elements. The terms "parallel", "perpendicular", "equal" include the described cases and the approximate cases similar to the described cases, and the approximate cases are within the acceptable deviation range, wherein the acceptable deviation range is determined by a person of ordinary skill in the art considering the measurement being discussed and the error related to the measurement of the specific quantity (i.e. the limitation of the measurement system). For example, "parallel" includes absolute parallel and approximate parallel, wherein the acceptable deviation range of approximate parallel can be, for example, within 5°; "perpendicular" includes absolute perpendicular and approximate perpendicular, wherein the acceptable deviation range of approximate perpendicular can also be, for example, within 5°. "Equal" includes absolute equality and approximate equality, wherein the acceptable deviation range of approximate equality can be, for example, that the difference between the two equalities is less than or equal to 5% of either one. For a person of ordinary skill in the art, the specific meaning of the above terms in the present application can be understood in specific cases.

[0030] In order for those skilled in the art to better understand the technical solutions of the present application, the present application will be further described in detail below in combination with the drawings and specific embodiments.

[0031] Figure 1 The working principle diagram of the cleaning device provided by the first embodiment of the present application.

[0032] As 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 may 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. Coolant in the coolant storage device A can flow to the temporary storage unit 14 driven by the first pump 12. Coolant in the temporary storage unit 14 can flow back to the coolant storage device A driven by the second pump 15. The flow direction of the coolant can be... Figure 1 The direction is clockwise as indicated by the middle arrow. The first detection module 11 can be located upstream of the filter module 13, meaning the first detection module 11 can be used to detect unfiltered coolant, thus accurately reflecting the contamination level of the coolant storage device A. The filter module 13 can be located upstream of the temporary storage section 14, meaning the temporary storage section 14 can be used to hold the 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 is connected in parallel with the low-pressure flushing branch 2. The flushing pressure 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 filter module 13, the temporary storage section 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 section 14 via the filter module 13. If the first detection module 11 detects that the contamination level of the coolant storage device A is lower than or equal to a predetermined contamination value, it controls the second pump 15 to deliver the coolant in the temporary storage section 14 to the coolant storage device A via the low-pressure flushing branch 2, thereby flushing the coolant storage device A in low-pressure flushing mode. If the first detection module 11 detects that the contamination level of the coolant storage device A is higher than the predetermined contamination value, it controls the first pump 12 to continuously deliver coolant to the temporary storage section 14 for a predetermined time, and then controls the second pump 15 to deliver the coolant in the temporary storage section 14 to the coolant storage device A via the high-pressure flushing branch 3, thereby flushing the coolant storage device A in high-pressure flushing mode. The predetermined contamination value can be set as needed. The predetermined time can be characterized as approximately the time required to drain all the coolant in the coolant storage device A to the temporary storage section 14. In other words, the coolant in the coolant storage device A can be drained before the high-pressure flushing branch 3 is used to perform high-pressure flushing on the coolant storage device A.

[0034] According to the embodiment of the present application, the first pump 12 is arranged to deliver the coolant in the coolant storage device A to the temporary storage 14. The first detection module 11 is arranged to detect the contamination degree of the coolant storage device A. The filter module 13 is arranged to filter the coolant. The second pump 15 is arranged to deliver the filtered coolant in the temporary storage 14 to the coolant storage device A to flush the coolant storage device A. The low-pressure flushing branch 2 and the high-pressure flushing branch 3 are arranged to select the low-pressure flushing mode or the high-pressure flushing mode according to the contamination degree of the coolant storage device A to avoid the low-pressure flushing mode being unable to effectively clean the coolant storage device A and the high-pressure flushing mode causing the second pump 15 to be overloaded and waste resources, thereby solving the technical problems of low cleaning degree and high energy consumption and achieving the technical effects of high cleaning degree and low energy consumption.

[0035] Figure 2 The working principle diagram of the cleaning device provided by the second embodiment of the present application.

[0036] As shown in Figure 2 some embodiments, the cleaning device can further include a drying module 5. The drying module 5 can be connected with the coolant storage device A. The drying module 5 can be electrically connected with the control module 4. After the flushing of the coolant storage device A is completed and the coolant in the coolant storage device A is discharged to the temporary storage 14 by the first pump 12, the drying module 5 can be used to provide heated inert gas to the coolant storage device A to dry the coolant storage device A. Whether the flushing operation is completed can be determined by detecting the running time of the low-pressure flushing mode or the high-pressure flushing mode. After the flushing operation is completed, the coolant in the coolant storage device A can be discharged to the temporary storage 14 by the first pump 12, but because the first pump 12 discharges the coolant in the coolant storage device A by suction, part of the coolant can still remain on the inner wall of the coolant storage device A, which can result in incomplete cleaning. By arranging the drying module 5, heated inert gas can be provided to the coolant storage device A, and the inert gas can carry the remaining coolant out of the coolant storage device A, thereby improving the cleaning effect.

[0037] Figure 3 The working principle diagram of the cleaning device provided by the third embodiment of the present application.

[0038] As shown in 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. Inert gas can carry residual coolant in the coolant storage device A into the liquefaction module 6. The liquefaction module 6 can liquefy the residual coolant. The liquefied coolant flows into the main flushing circuit 1 under the drive of the second pump 15. Further, the liquefied coolant can flow into the filter module 13 under the drive of the second pump 15, and after being filtered by the filter module 13, it flows to the temporary storage section 14. By connecting the liquefaction module 6 to the second pump 15, residual coolant can be recovered, avoiding pollution of the external environment and preventing waste of coolant.

[0039] Figure 4 This is a schematic diagram illustrating 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 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, the degree of contamination detected by the second detection module 16 can also be used to determine whether the flushing operation is completed. For example, if 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 according to requirements.

[0041] Furthermore, such as 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 have channels allowing coolant flow. The plurality of nozzles 32 are respectively mounted within the coolant storage device A based on the mounting bracket 31. The nozzles 32 can be used to spray coolant from the temporary storage section 14 onto the inner wall of the coolant storage device A. Figure 4As shown, multiple nozzles 32 can be installed on the top of the coolant storage device A. Furthermore, multiple nozzles 32 can also be installed on the bottom or middle of the coolant storage device A. Different nozzles 32 have different spray angles, thus allowing spraying to every location within the coolant storage device A. For example, the nozzles 32 are rotatably mounted on the mounting bracket 31, meaning that the spray angle of the nozzles 32 can be changed by controlling the rotation of the nozzles 32. Furthermore, the mounting bracket 31 may include a first part connected to the second pump 15 and a second part for mounting the multiple nozzles 32. The second part can be rotatably connected to the first part, and the second part can drive the multiple nozzles 32 to rotate, thereby further ensuring that coolant is sprayed to every location within the coolant storage device A. The mounting bracket 31 and the nozzles 32 can be electrically connected to the control module 4, thereby rotating or spraying coolant under the control of the control module 4. The control module 4 can control the operating pressure of the nozzles 32 between 0.3 MPa and 1 MPa, and maintain the fluctuation of the operating pressure of the nozzles 32 between -2% and 2%.

[0042] Furthermore, the low-pressure flushing branch 2 can form a circulating loop with the main flushing circuit 1 to flush the coolant storage device A through coolant circulation. 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 manual intervention.

[0043] Figure 5 This is a schematic diagram illustrating 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 may be equipped with a second pressure sensor 7 and a flow meter 8. The high-pressure flushing branch 3 may also be equipped with a second pressure sensor 7 and a flow meter 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, to prevent the pipes of the low-pressure flushing branch 2 and / or the high-pressure flushing branch 3 from rupturing due to excessive pressure, thereby improving the safety of cleaning, and to prevent low cleanliness due to insufficient pressure. The flow meter 8 can be used to detect the flow rate of the coolant in the low-pressure flushing branch 2 and / or the high-pressure flushing branch 3, so as to control the supply of coolant with a preset flow rate and preset pressure to the coolant storage device A by the low-pressure flushing branch 2 and / or the high-pressure flushing branch 3. For example, in the 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, by setting the flow meter 8, the normal operating status of the second pump 15 can also be detected.

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

[0046] As shown, in some embodiments, the high-pressure flushing branch 3 can be provided with a second valve 33. The second valve 33 can be used to allow or prevent the coolant to flow into the high-pressure flushing branch 3. When flushing the coolant storage device A in the high-pressure flushing mode, the second valve 33 can be kept open to allow the 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 can be kept closed to prevent the coolant from flowing into the high-pressure flushing branch 3. Figure 5 As shown, in some embodiments, the coolant storage device A can also be connected with a liquid level sensor 10. The liquid level sensor 10 can be used to detect the liquid level of the coolant in the coolant storage device A. For example, in the high-pressure flushing mode, when the liquid level sensor 10 detects that the liquid level of the coolant exceeds a predetermined liquid level, the high-pressure flushing can be stopped, and the high-pressure flushing mode can be re-entered after the coolant in the coolant storage device A is discharged. The predetermined liquid level can be set as needed.

[0047] Figure 5 As shown, in some embodiments, the first pump 12 and the coolant storage device A can be provided with a third valve 17. The third valve 17 can 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.

[0048] As shown, in some embodiments, the temporary storage part 14 can also be connected with a liquid level sensor 10. The liquid level sensor 10 can be used to monitor the liquid level of the coolant in the temporary storage part 14 in real time. Figure 5 As shown, in some embodiments, the drying module 5 can 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 can be used to provide inert gas. The inert gas can be nitrogen. The heating wire 52 can be used to heat the inert gas. For example, the control module 4 can control the heating wire 52 to warm up to 80°C at a rate of 5°C / min and keep the heating wire 52 at 80°C to heat the inert gas.

[0049] Figure 5 As shown, in some embodiments, the drying module 5 can 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 can be used to provide inert gas. The inert gas can be nitrogen. The heating wire 52 can be used to heat the inert gas. For example, the control module 4 can control the heating wire 52 to warm up to 80°C at a rate of 5°C / min and keep the heating wire 52 at 80°C to heat the inert gas.

[0050] As shown, in some embodiments, the drying module 5 can 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 can be used to provide inert gas. The inert gas can be nitrogen. The heating wire 52 can be used to heat the inert gas. For example, the control module 4 can control the heating wire 52 to warm up to 80°C at a rate of 5°C / min and keep the heating wire 52 at 80°C to heat the inert gas. Figure 5 As shown, in some embodiments, the drying module 5 can 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 can be used to provide inert gas. The inert gas can be nitrogen. The heating wire 52 can be used to heat the inert gas. For example, the control module 4 can control the heating wire 52 to warm up to 80°C at a rate of 5°C / min and keep 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 supplied by the drying module 5 to the coolant storage device A. For example, if 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 supplied by the drying module 5 to the coolant storage device A. If 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 setting the third pressure sensor 55, the supply of inert gas from the inert gas source 51 to the coolant storage device A can be controlled to be relatively stable. For example, inert gas can be continuously supplied to the coolant storage device A at a flow rate of 30 L / min for 10 minutes.

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

[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 5L / 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. During flushing operations of the coolant storage device A, the fifth valve 63 can be closed to prevent coolant in the coolant storage device A from flowing into the condenser 61. During drying operations of the coolant storage device A, the fifth valve 63 can be opened to allow inert gas to carry residual coolant into the energy storage unit. A collection bottle 62 may be connected to the condenser 61 and the second pump 15. The collection bottle 62 can be used to collect the coolant liquefied by the condenser 61. The second pump 15 can deliver the liquefied coolant to the filter module 13. The coolant can also be directly discharged from the collection bottle 62 to an external waste liquid recovery device. The coolant can be a fluorinated liquid. An exhaust valve 66 may be provided on the top of the collection bottle 62. Inert gas can be discharged through the exhaust valve 66. By liquefying the residual coolant before discharging the inert gas, it is possible to avoid the inert gas carrying coolant with it during discharge, thereby preventing environmental pollution. A sixth valve 64 may be provided between the collection bottle 62 and the second pump 15 to allow or prevent coolant from flowing from the collection bottle 62 to the filter module 13. For example, the sixth valve 64 may be closed when the inert gas has not been discharged from the collection bottle 62, and may be opened after the inert gas has been discharged from the collection bottle 62 to allow coolant to flow from the collection bottle 62 to the filter 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 collection bottle 62. The purity detector 65 can be used to detect the purity of the coolant in the collection bottle 62. If the purity is less than a preset purity, the coolant storage device A can be flushed again until the coolant purity reaches the preset purity. The preset purity can be set as needed. For example, the preset purity can be 98%. The purity detector 65 can be an infrared spectral probe to dynamically analyze the purity of the coolant. The sampling frequency of the infrared spectral probe can be 1Hz, and the detection band can be 8μm-12μm.

[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 provided with the conductivity detector 111, the turbidity sensor 112 and the pH sensor 113 simultaneously. The conductivity detector 111 can be used to detect the concentration change of the electrolyte in the cooling liquid. By detecting the concentration of the electrolyte, it can be avoided that the liquid-cooled server is corroded due to the too high concentration of the electrolyte. The turbidity sensor 112 can be used to detect the suspended particulate matter in the cooling liquid. By detecting the suspended particulate matter in the cooling liquid, it can be avoided that the liquid-cooled server is abraded due to too much suspended particulate matter. The pH sensor 113 can be used to detect the pH of the cooling liquid. By detecting the pH of the cooling liquid, it can be avoided that the additive of the cooling liquid is ineffective due to the pH deviation (e.g. the pH is less than 6.5 or less than 8.5). Further, the pollution degree can be determined according to the detection result of the conductivity detector 111, the turbidity sensor 112 and / or the pH sensor 113. For example, in the case that the first detection module 11 is the conductivity detector 111, the pollution predetermined value can be 500 μS / cm. In the case that the detection value (i.e. the conductivity) of the conductivity detector 111 is 600 μS / cm, the pollution degree can be 600 μS / cm, and the cooling liquid storage device A can be flushed by using the high-pressure flushing mode. In the case that the detection value of the conductivity detector 111 is 400 μS / cm, the pollution degree can be 400 μS / cm, and the cooling liquid storage device A can be flushed by using the low-pressure flushing mode.

[0057] For example, in the case that the first detection module 11 is the turbidity sensor 112, the pollution predetermined value can be 5. In the case that the detection value (i.e. the turbidity) of the turbidity sensor 112 is 4, the pollution degree can be 4, and the cooling liquid storage device A can be flushed by using the low-pressure flushing mode. In the case that the detection value of the turbidity sensor 112 is 6, the pollution degree can be 6, and the cooling liquid storage device A can be flushed by using the high-pressure flushing mode.

[0058] For example, in the case that the first detection module 11 is the pH sensor 113, the pollution predetermined value can be 0.5. The pollution degree can be the difference between the detection value (i.e. the pH) of the pH sensor 113 and 7. In the case that the pH sensor 113 detects that the pH is 6.5, the pollution degree is 0.5, and thus the cooling liquid storage device A can be flushed by using the low-pressure flushing mode. In the case that the pH sensor 113 detects that the pH is 6, the pollution degree is 1, and thus the cooling liquid storage device A can be flushed by using the high-pressure flushing mode.

[0059] Furthermore, when the first detection module 11 simultaneously 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 degree of contamination can be: 0.4 × conductivity + 0.3 × turbidity + 0.3 × |pH-7|. The predetermined contamination 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 nanoscale particles.

[0061] like Figure 5 As shown, in some embodiments, the filter 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 can be used to detect the pressure values ​​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 flushing fluid to the porous membrane 131 in a direction opposite to the flow direction of the coolant to backwash the porous membrane 131. The predetermined pressure value can be set as needed. When the pressure value exceeds the predetermined pressure value, it can indicate that the porous membrane 131 is blocked. For example, the predetermined pressure value may be 50 kPa. When the detected pressure value is greater than 50 kPa, flushing fluid with a pressure of 0.8 MPa may be provided to the porous membrane 131 and flushed for 2 minutes.

[0062] like Figure 6 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 flushing fluid for backwashing the porous membrane 131. Driven by the backwash pump 139, the flushing fluid can flush the porous membrane 131 in the opposite direction to the flow direction of the coolant.

[0063] like Figure 6 As shown, in some embodiments, a fourth valve 18 may be provided between the temporary storage section 14 and the porous membrane 131. The fourth valve 18 may be opened when coolant in the coolant storage device A is delivered to the temporary storage section 14. The fourth valve 18 may be closed when the porous membrane 131 is backwashed in the backwash branch 132 to prevent backwashing fluid from entering the temporary storage section 14.

[0064] In some embodiments, the filtering module 13 can further include at least one of a stainless steel filter screen 137, a ceramic filter cartridge 134, a resin adsorption layer 135, and a permanent magnet separation barrel 136. The stainless steel filter screen 137 can have a pore size of 50 pm to intercept large-particle impurities. The ceramic filter cartridge 134 can have a pore size of 5 pm to adsorb colloidal particles. The resin adsorption layer 135 can be used to remove organic contaminants. The permanent magnet 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 embodiments of the present application, by simultaneously providing the porous membrane 131, the stainless steel filter screen 137, the ceramic filter cartridge 134, the resin adsorption layer 135, and the permanent magnet separation barrel 136 in the filtering module 13, the impurity removal rate of the coolant can reach 99.7%. Further, the porous membrane 131, the stainless steel filter screen 137, the ceramic filter cartridge 134, the resin adsorption layer 135, and the permanent magnet separation barrel 136 are detachably installed in the main flushing circuit 1, so as to facilitate replacement of the porous membrane 131, the stainless steel filter screen 137, the ceramic filter cartridge 134, the resin adsorption layer 135, and the permanent magnet separation barrel 136.

[0066] ​ A flowchart of the cleaning method provided by the embodiments of the present application is shown.

[0067] As ​ shown, the embodiments of the present application further provide a cleaning method suitable for the cleaning device suitable for the coolant storage device described above. The cleaning method can 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 via the filtering module.

[0069] In step S620, in the case where the first detection module detects that the contamination degree of the coolant storage device is lower than or equal to the contamination predetermined value, the second pump is controlled to deliver the coolant in the temporary storage 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, in the case where the first detection module detects that the contamination degree of the coolant storage device is higher than the contamination predetermined value, after the first pump is controlled to continuously deliver the coolant to the temporary storage for a predetermined time length, the second pump is controlled to deliver the coolant in the temporary storage to the coolant storage device via the high-pressure flushing branch to flush the coolant storage device in the high-pressure flushing mode.

[0071] According to the embodiment of the present application, the coolant in the coolant storage device can be delivered to the temporary storage by controlling the first pump. The filtered coolant in the temporary storage can be delivered to the coolant storage device by controlling the second pump to flush the coolant storage device. The degree of contamination of the coolant storage device obtained by the first detection module can be used to accurately select the low-pressure flushing mode or the high-pressure flushing mode to flush the coolant storage device, so as to avoid the situation that the coolant storage device cannot be effectively cleaned in the single low-pressure flushing mode, and the second pump is overloaded and resources are wasted in the single high-pressure flushing mode, thereby achieving energy consumption optimization while ensuring the cleaning effect.

[0072] Further, the cleaning method can be implemented by the control module described above. 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 according to the historical cleaning data.

[0073] The embodiment of the present application also provides a cooling system. The cooling system can include a coolant storage device and the cleaning device suitable for the coolant storage device described above. The coolant storage device stores coolant. The cleaning device can be connected to the coolant storage device. The cleaning device can clean the coolant storage device by using the cleaning method described above, thereby improving the cooling effect of the cooling system.

[0074] The above describes a cleaning device suitable for a coolant storage device, a cleaning method and a cooling system provided by the present application in detail. The principles and implementation modes of the present application are described by applying specific examples in this paper. The above description of the embodiments is only used to help understand the method of the present application and its core idea. It should be pointed out that for ordinary skilled in the art, without departing from the principles of the present application, the present application can be improved and modified in several ways, and these improvements and modifications also fall within the protection scope of the embodiments of the present application.

Claims

1. A cleaning device suitable for use with a coolant storage device, the cleaning device comprising: a housing; a cleaning element disposed within the housing; and a cleaning element drive configured to move the cleaning element within the housing. The application relates to a cooling liquid storage device, comprising: a main flushing circuit connected with the cooling liquid storage device, the main flushing circuit comprising a first detection module, a first pump, a filtering module, a temporary storage unit and a second pump connected in series; a low-pressure flushing branch connected with the cooling liquid storage device and the second pump respectively; a high-pressure flushing branch connected with the cooling liquid storage device and the second pump respectively and connected with the low-pressure flushing branch in parallel; a control module configured to control the first pump to transport the cooling liquid in the cooling liquid storage device to the temporary storage unit via the filtering module, control the second pump to transport the cooling liquid in the temporary storage unit to the cooling liquid storage device via the low-pressure flushing branch to flush the cooling liquid storage device in a low-pressure flushing mode when the first detection module detects that the pollution degree of the cooling liquid storage device is lower than or equal to a pollution predetermined value; control the second pump to transport the cooling liquid in the temporary storage unit to the cooling liquid storage device via the high-pressure flushing branch to flush the cooling liquid storage device in a high-pressure flushing mode after the first pump continuously transports the cooling liquid to the temporary storage unit for a predetermined time length when the first detection module detects that the pollution degree of the cooling liquid storage device is higher than the pollution predetermined value; a drying module connected with the cooling liquid storage device, the drying module being configured to provide heated inert gas to the cooling liquid storage device to dry the cooling liquid storage device after flushing the cooling liquid storage device and discharging the cooling liquid in the cooling liquid storage device to the temporary storage unit by using the first pump; a liquefaction module, the inert gas carrying the residual cooling liquid in the cooling liquid storage device into the liquefaction module, the liquefaction module comprising: a condenser connected with the cooling liquid storage device; a collection bottle connected with the condenser and the second pump, the collection bottle being configured to collect the liquefied cooling liquid by the condenser, and the second pump transporting the liquefied cooling liquid to the filtering module; a purity detector connected with the collection bottle, the purity detector being configured to detect the purity of the cooling liquid in the collection bottle, and flushing the cooling liquid storage device again when the purity is less than a preset purity.

2. The cleaning device suitable for use with a coolant storage device of claim 1, wherein, The high-pressure flushing branch comprises: a mounting frame connected with the second pump and extending into the cooling liquid storage device; a plurality of nozzles respectively installed in the cooling liquid storage device based on the mounting frame, the nozzles being configured to spray the cooling liquid from the temporary storage unit to the inner wall of the cooling liquid storage device.

3. The cleaning device suitable for use with a coolant storage device of claim 1, wherein, The filtering module comprises a porous membrane with a pore size greater than or equal to 0.001 nanometer and less than or equal to 20 micrometers.

4. The cleaning device suitable for use with a coolant storage device of claim 3, wherein, The filtering module further comprises: a first pressure sensor connected with the porous membrane, the first pressure sensor being configured to detect the pressure value at both ends of the porous membrane. A backwash branch connected with the porous membrane to form a backwash loop, the backwash branch providing a flushing liquid to the porous membrane in a direction opposite to the direction of the cooling liquid flow when the pressure value exceeds a predetermined pressure value.

5. The cleaning device suitable for use with a coolant storage device of claim 1, wherein, The filter module comprises at least one of a stainless steel filter screen, a ceramic filter element, a resin adsorption layer, and a permanent magnetic separation barrel.

6. The cleaning device suitable for use with a coolant storage device of claim 1, wherein, A second detection module is further arranged between the filter module and the temporary storage part, and is configured to detect the pollution degree of the cooling liquid filtered by the filter module.

7. The cleaning device suitable for use with a coolant storage device of claim 6, wherein, The first detection module and / or the second detection module comprises at least one of a conductivity detector, a turbidity sensor, and a pH sensor.

8. The cleaning device suitable for use with a coolant storage device of claim 1, wherein, The low-pressure flushing branch and / or the high-pressure flushing branch comprises: 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 configured to detect the flow of the cooling liquid in the low-pressure flushing branch and / or the high-pressure flushing branch.

9. The cleaning device suitable for a cooling liquid storage device according to claim 2, wherein: The low-pressure flushing branch comprises a first valve configured to allow or prevent the cooling liquid from flowing into the low-pressure flushing branch; and / or The high-pressure flushing branch comprises a second valve configured to allow or prevent the cooling liquid from flowing into the high-pressure flushing branch. Comprising:

10. A cleaning method suitable for the cleaning device for the cooling liquid storage device according to any one of claims 1 to 9, characterized by, Controlling a first pump to deliver the cooling liquid in the cooling liquid storage device to a temporary storage part via a filter module; In a case where a first detection module detects that the pollution degree of the cooling liquid storage device is lower than or equal to a pollution predetermined value, controlling a second pump to deliver the cooling liquid in the temporary storage part to the cooling liquid storage device via a low-pressure flushing branch to flush the cooling liquid storage device in a low-pressure flushing mode; In a case where the first detection module detects that the pollution degree of the cooling liquid storage device is higher than the pollution predetermined value, controlling the first pump to continuously deliver the cooling liquid to the temporary storage part for a predetermined time length, and then controlling a second pump to deliver the cooling liquid in the temporary storage part to the cooling liquid storage device via a high-pressure flushing branch to flush the cooling liquid storage device in a high-pressure flushing mode. Comprising:

11. A cooling system characterized by, A cooling liquid storage device storing a cooling liquid; The cleaning device suitable for a cooling liquid storage device according to any one of claims 1 to 9 is connected with the cooling liquid storage device. ​

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