Circulating liquid supply system for liquid cooling and circulating liquid supply method for liquid cooling

Abstract

The present application provides a circulating liquid supply system for liquid cooling and a circulating liquid supply method for liquid cooling. The circulating liquid supply system for liquid cooling comprises: a basic circulating liquid supply device comprising a heat exchanger and a circulation pump which are communicated through a pipe; a negative-pressure circulating liquid supply device comprising a liquid tank and a negative-pressure generation component which are communicated through a pipe; and a switching assembly. The circulating liquid supply system for liquid cooling has a basic circulation mode and a negative-pressure circulation mode; in the basic circulation mode, the circulation pump drives a cooling liquid to perform circulating heat exchange between a position to be cooled and the heat exchanger under a positive pressure along the pipe; and in the negative-pressure circulation mode, the negative-pressure generation component drives the cooling liquid to perform circulating heat exchange between said position and the heat exchanger under a negative pressure along the pipe. According to the present application, the basic circulating liquid supply device can be used independently as a conventional positive-pressure CDU, and can also be used in combination with the negative-pressure circulating liquid supply device to be used as a negative-pressure CDU.

Description

Liquid cooling circulation liquid supply system and liquid cooling circulation liquid supply method

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application claims priority to the Chinese patent application filed with the China Patent Office on March 29, 2024, with application number 202410376228.4 and application name “Liquid Cooling Circulating Liquid Supply System and Liquid Cooling Circulating Liquid Supply Method”, all contents of which are incorporated by reference into this application. Technical Field

[0003] The present application relates to the technical field of liquid cooling equipment, and in particular to a liquid cooling circulation liquid supply system and a liquid cooling circulation liquid supply method. Background Art

[0004] As chip power consumption increases exponentially, traditional air cooling technology has reached its cost-effective heat dissipation limit. Liquid cooling technology, which can solve the heat dissipation problem of higher heat flux density and has higher energy efficiency, has emerged and has flourished in recent years. Currently, the commonly used chip-level liquid cooling technologies are immersion liquid cooling and cold plate liquid cooling. Among them, immersion liquid cooling is used on a smaller scale due to its high cost and difficult maintenance. Cold plate liquid cooling uses a pump to drive the coolant (water, ethylene glycol, etc.) through the flow channel on the back of the chip. The coolant exchanges heat with the chip through the plate wall in the channel to remove the heat from the chip, thereby achieving the purpose of heat dissipation. The cold plate liquid cooling method has the advantages of mature technology, energy saving and noise reduction, and is therefore widely used.

[0005] In the relevant cold plate liquid cooling system, the CDU (Coolant Distribution Unit, full name in English: Coolant Distribution Units) is the core power unit, which is used to realize the functions of driving, stabilizing the pressure, and automatically distributing the heat exchange medium within the cooling loop of the liquid cooling system. The CDU acts as a power unit to drive the coolant (i.e., the heat exchange medium) to circulate within the system. Currently, conventional CDUs are mainly driven by circulating pumps, and the system is at positive pressure (i.e., the air pressure within the system is greater than the external atmospheric pressure). Therefore, when a rupture or loosening occurs somewhere in the system, the coolant will leak and other problems. The currently widely used coolants such as water and propylene glycol aqueous solution are conductive, and once leaked, it can cause fatal damage to the server. Therefore, certain technical means are used to reduce the pressure within the system to below the external atmospheric pressure, that is, to create a negative pressure system to address the above leakage problem. In this way, the coolant will not leak into the server and other locations, but external air will enter the system, making the cooling system safer. In summary, the application prospects of cooling systems that generate negative pressure are relatively broad.

[0006] The negative pressure cooling system in related technologies usually has many internal components and a complex structure, which makes component maintenance extremely difficult during actual use; and it only relies on the vacuum pump to provide constant suction force to adjust the liquid supply pressure and flow, which has many limitations in actual use; in addition, if a component fails, the entire system will not be able to operate, and the system reliability is poor. Summary of the Invention

[0007] The present application provides a liquid cooling circulation liquid supply system and a liquid cooling circulation liquid supply method to solve the problems of poor working stability and easy leakage of coolant in the liquid cooling system in the related art.

[0008] In order to solve the above problems, according to the first aspect of the present application, a liquid cooling circulation liquid supply system is provided, including: a basic circulation liquid supply device, including a heat exchanger and a circulation pump connected by a pipeline; a negative pressure circulation liquid supply device, including a liquid tank and a negative pressure generating component connected by a pipeline, the negative pressure generating component is used to adjust the pressure in the accommodating chamber inside the liquid tank to negative pressure; a switching component is used to control the connection and disconnection between the basic circulation liquid supply device and the negative pressure circulation liquid supply device; wherein, the liquid cooling circulation liquid supply system has a basic circulation mode and a negative pressure circulation mode, in the basic circulation mode, the switching component disconnects the connection between the basic circulation liquid supply device and the negative pressure circulation liquid supply device, and the circulation pump drives the coolant to circulate heat at positive pressure along the pipeline between the position to be cooled and the heat exchanger; in the negative pressure circulation mode, the switching component connects the basic circulation liquid supply device and the negative pressure circulation liquid supply device, and the negative pressure generating component drives the coolant to circulate heat at negative pressure along the pipeline between the position to be cooled and the heat exchanger.

[0009] In one embodiment, in the negative pressure circulation mode, the negative pressure generating assembly and the circulation pump simultaneously drive the coolant to circulate heat at negative pressure along the pipeline between the location to be cooled and the heat exchanger.

[0010] In one embodiment, there are two liquid tanks, namely a first liquid tank and a second liquid tank, which are respectively connected to the negative pressure generating component through pipelines; the reciprocating flow of the cooling liquid is controlled by controlling the changes in the pressure in the first liquid tank and the pressure in the second liquid tank.

[0011] In one embodiment, the pressure in the first liquid tank is a first negative pressure, and the pressure in the second liquid tank is a second negative pressure; when the liquid level in the first liquid tank does not exceed the set height, the first negative pressure is less than the second negative pressure, and the second negative pressure is less than or equal to the external air pressure; the heat exchanger and the position to be cooled are connected between the first liquid tank and the second liquid tank through a pipeline, and the coolant enters the first liquid tank from the second liquid tank through the pressure difference between the first negative pressure and the second negative pressure.

[0012] In one embodiment, the negative pressure circulation liquid supply device also includes a liquid level gauge, which is used to detect the liquid level of the coolant in the accommodating chamber; when the liquid level gauge detects that the liquid level in the first liquid tank exceeds a set height, the first negative pressure is controlled to be greater than the second negative pressure, and the first negative pressure is less than or equal to the external air pressure, so that the coolant enters the second liquid tank from the first liquid tank.

[0013] In one embodiment, the switching assembly includes a first on-off valve, a second on-off valve, a third on-off valve, a fourth on-off valve, and a fifth on-off valve; the first on-off valve is arranged on the circulation pipeline in the basic circulation liquid supply device, and is used to control the on-off of the circulation pipeline of the basic circulation liquid supply device; the negative pressure circulation liquid supply device also includes a first input pipe, a first output pipe, a second input pipe, and a second output pipe; one end of the first input pipe and one end of the first output pipe are respectively connected to the first liquid tank, the second on-off valve is arranged on the first input pipe, and the third on-off valve is arranged on the first output pipe; one end of the second input pipe and one end of the second output pipe are respectively connected to the second liquid tank, the fourth on-off valve is arranged on the second input pipe, and the fifth on-off valve is arranged on the second output pipe; the other end of the first input pipe and the other end of the second input pipe are respectively connected to the pipeline at one end of the first on-off valve, and the other end of the first output pipe and the other end of the second output pipe are respectively connected to the pipeline at the other end of the first on-off valve; wherein, in the basic circulation mode, the second on-off valve, the third on-off valve, the fourth on-off valve, and the fifth on-off valve are all in the closed state, and the first on-off valve is opened to disconnect the basic circulation liquid supply device and the negative pressure circulation liquid supply device.

[0014] In one embodiment, in the negative pressure circulation mode, the first negative pressure is less than the second negative pressure, and the second negative pressure is less than or equal to the external air pressure, the second switch valve and the fifth switch valve are in the open state, and the first switch valve, the third switch valve and the fourth switch valve are in the closed state; the coolant enters the pipeline at the other end of the first switch valve from the second liquid tank and the second output pipeline, and passes through the heat exchanger, the position to be cooled, the pipeline at one end of the first switch valve and the first input pipe in sequence to enter the first liquid tank; or, in the negative pressure circulation mode, the first negative pressure is greater than the second negative pressure, and the first negative pressure is less than or equal to the external air pressure, the third switch valve and the fourth switch valve are in the open state, and the first switch valve, the second switch valve and the fifth switch valve are in the closed state; the coolant enters the pipeline at the other end of the first switch valve from the first liquid tank and the first output pipeline, and passes through the heat exchanger, the position to be cooled, the pipeline at one end of the first switch valve and the second input pipe in sequence to enter the second liquid tank.

[0015] In one embodiment, the negative pressure circulation liquid supply device also includes a first connecting valve and a second connecting valve, one end of the first connecting valve is connected to the accommodating chamber of the first liquid tank through a pipeline, and the other end is connected to the external atmosphere; one end of the second connecting valve is connected to the accommodating chamber of the second liquid tank through a pipeline, and the other end is connected to the external atmosphere; the negative pressure generating component can be connected to the accommodating chamber of the first liquid tank and the second liquid tank respectively.

[0016] In one embodiment, the basic circulating liquid supply device also includes: a filter, an outlet pressure sensor, an outlet temperature sensor, a first solenoid valve, a first flow valve, a bypass branch, a second solenoid valve and a second flow valve; the outlet of the heat exchanger, the circulating pump, the filter, the first flow valve, the outlet temperature sensor, the outlet pressure sensor, the first solenoid valve, and the inlet of the position to be cooled are connected in sequence through pipelines; the outlet pressure sensor is used to detect the pressure of the coolant at the outlet of the pipeline to obtain the outlet pressure; the first solenoid valve is used to control the on-off of the pipeline of the basic circulating liquid supply device, and the first flow valve is used to adjust the pipeline flow of the basic circulating liquid supply device; the bypass branch is arranged in parallel with the position to be cooled for diverting the flow to the position to be cooled; the second solenoid valve and the second flow valve are arranged on the bypass branch in sequence, the second solenoid valve is used to control the on-off of the bypass branch, and the second flow valve is used to adjust the flow of the bypass branch; the outlet of the position to be cooled is connected to the switching component and the inlet of the heat exchanger through a pipeline to allow the coolant to circulate.

[0017] In one embodiment, the heat exchanger has a basic circulation pipeline and a circulation heat exchange pipeline arranged at intervals, and the basic circulation pipeline is connected to the circulation pump; the liquid cooling circulation supply system also includes a circulation heat exchange device, the circulation heat exchange device includes a heat exchange source for exchanging heat with the external environment, an on-off valve for controlling the on-off of the pipeline, a circulation filter, a first circulation temperature sensor and a second circulation temperature sensor, one end of the heat exchange source, the first circulation temperature sensor, the on-off valve, and one end of the circulation heat exchange pipeline are connected in sequence through the pipeline; the other end of the circulation heat exchange pipeline, the circulation filter, the second circulation temperature sensor, and the other end of the heat exchange source are connected in sequence through the pipeline; the heat exchange source exchanges heat with the basic circulation pipeline through the circulation heat exchange pipeline.

[0018] In one embodiment, the liquid-cooled circulating liquid supply system also includes a central control terminal and an altitude sensor for detecting the altitude of the location of the negative pressure circulating liquid supply device. The altitude sensor is electrically connected to the central control terminal, and the central control terminal calculates the external environmental atmospheric pressure based on the altitude detected by the altitude sensor; the liquid-cooled circulating liquid supply system also includes an alarm and an outlet pressure sensor, and the alarm is electrically connected to the central control terminal for issuing an alarm message; the outlet pressure sensor is arranged at the outlet of the pipeline and is electrically connected to the central control terminal; the outlet pressure sensor is used to detect the outlet pressure; the circulating pump and the negative pressure generating component are respectively electrically connected to the central control terminal, and the central control terminal controls the circulating pump and the negative pressure generating component to work in coordination according to the outlet pressure, the calculated external environmental atmospheric pressure and the outlet pressure setting value.

[0019] According to the second aspect of the present application, a liquid cooling circulation liquid supply method is provided, which is applied to the above-mentioned liquid cooling circulation liquid supply system; the liquid cooling circulation liquid supply method includes: a basic circulation liquid supply step: using a circulation pump to drive the coolant to circulate heat exchange at a positive pressure between the position to be cooled and the heat exchanger; a negative pressure circulation liquid supply step: using a negative pressure generating component and / or a circulation pump to drive the coolant to circulate heat exchange at a negative pressure along the pipeline between the position to be cooled and the heat exchanger.

[0020] In one embodiment, there are two liquid tanks, namely a first liquid tank and a second liquid tank, which are respectively connected to the negative pressure generating component through pipelines; the pressure in the first liquid tank is a first negative pressure, and the pressure in the second liquid tank is a second negative pressure; the negative pressure circulation liquid supply step also includes a negative pressure switching step: first controlling the first negative pressure to be less than the second negative pressure, and the second negative pressure to be less than or equal to the external air pressure, so that the coolant enters the first liquid tank from the second liquid tank; detecting the liquid level height in the first liquid tank, and when it exceeds the set height, controlling the first negative pressure to be greater than the second negative pressure, and the first negative pressure to be less than or equal to the external air pressure, so that the coolant enters the second liquid tank from the first liquid tank.

[0021] In one embodiment, the external pressure Po is calculated according to the following formula: Po = P0*[1-(0.0065*H) / 288.15] 5.255 ; Among them, P0 is the standard atmospheric pressure, and H is the altitude of the location of the negative pressure circulation liquid supply device.

[0022] In one embodiment, the liquid cooling circulation supply method also includes a hydraulic control step; detecting the pressure of the coolant at the pipeline outlet to obtain the outlet pressure, comparing the outlet pressure with the outlet pressure set value, and controlling the circulation pump and / or the negative pressure generating component to work together to adjust the outlet pressure.

[0023] In one embodiment, the hydraulic control step includes a self-adjusting correction factor control step and a closed-loop control step; the outlet pressure is compared with the outlet pressure set value to calculate the actual error, and when the absolute value of the actual error is greater than the first error, the self-adjusting correction factor control step is executed to adjust the outlet pressure; when the absolute value of the actual error is less than the first error and greater than the second error, the closed-loop control step is executed to adjust the outlet pressure.

[0024] In one embodiment, the self-adjusting correction factor control step includes: when |E|>Eb, U=-Ku[αE+(1-α)EC], adjusting the power of the circulation pump and / or the negative pressure generating component according to the size of U; wherein E is the actual error, Eb is the first error, Ku is the proportional coefficient, α=(α s -α0)︱E︱ / N+α0,0<α0<α<α s <1, set the domain of E, EC and U to (-N, ..., -1, 0, 1, ..., N), N = 20.

[0025] In one embodiment, the closed-loop control step includes: when Ea<︱E︱<Eb, U=Kp

e(k)-e(k-1)

e(k)-2e(k-1)+e(k-2)

[0026] In one embodiment, the hydraulic control step also includes a repetition step: when the absolute value of the actual error is equal to the first error or less than or equal to the second error, if the previous step of the repetition step is a self-adjusting correction factor control step or a closed-loop control step, the step before the repetition step is repeated to adjust the outlet pressure; if there is no self-adjusting correction factor control step and closed-loop control step before the repetition step, the status quo is maintained.

[0027] In one embodiment, when the previous step of the repeated step is a self-adjusting correction factor control step or a closed-loop control step, and ︱E︱=Eb or ︱E︱≤Ea, U=u0, where Ea is the second error, E is the actual error, Eb is the first error, and u0 is the self-adjusting correction factor control step or the closed-loop control step before the repeated step.

[0028] In one embodiment, the liquid-cooled circulating liquid supply method further includes a fault control step: when a fault is detected in the negative pressure circulating liquid supply device, an alarm message is issued, and the liquid-cooled circulating liquid supply system is switched to operate in a basic circulation mode; when a fault is detected in the circulation pump in the basic circulation liquid supply device, an alarm message is issued, and the liquid-cooled circulating liquid supply system is switched to operate in a negative pressure circulation mode.

[0029] Applying the technical solution of the present application, the present application provides a liquid cooling circulation liquid supply system, including: a basic circulation liquid supply device, including a heat exchanger and a circulation pump connected by a pipeline; a negative pressure circulation liquid supply device, including a liquid tank and a negative pressure generating component connected by a pipeline, the negative pressure generating component is used to adjust the pressure in the accommodating cavity inside the liquid tank to negative pressure; a switching component is used to control the connection between the basic circulation liquid supply device and the negative pressure circulation liquid supply device; wherein, the liquid cooling circulation liquid supply system has a basic circulation mode and a negative pressure circulation mode, in the basic circulation mode, the switching component disconnects the connection between the basic circulation liquid supply device and the negative pressure circulation liquid supply device, and the circulation pump drives the coolant to circulate heat at positive pressure along the pipeline between the position to be cooled and the heat exchanger; in the negative pressure circulation mode, the switching component connects the basic circulation liquid supply device and the negative pressure circulation liquid supply device, and the negative pressure generating component drives the coolant to circulate heat at negative pressure along the pipeline between the position to be cooled and the heat exchanger.

[0030] The present application creates a combined liquid cooling circulation liquid supply system by arranging a basic circulation liquid supply device and a negative pressure circulation liquid supply device to work together. By switching components, the present application can use the basic circulation liquid supply device alone as a conventional positive pressure CDU, or the basic circulation liquid supply device and the negative pressure circulation liquid supply device together as a negative pressure CDU; the basic circulation liquid supply device and the negative pressure circulation liquid supply device can be maintained separately; the system complexity of the present application is low, and the maintenance difficulty is greatly reduced; when one of the basic circulation liquid supply device and the negative pressure circulation liquid supply device fails, the liquid cooling circulation liquid supply system can still operate normally, thereby improving the system's operating reliability; the present application can greatly reduce the difficulty of system maintenance and installation deployment, reduce operation and maintenance costs, and is suitable for large-scale promotion and use; the liquid cooling circulation liquid supply system proposed in the present application can subsequently be combined with a related liquid cooling circulation liquid supply method, which can not only effectively solve the problem that the related negative pressure liquid cooling system is usually unable to adjust the pressure, but also improve the system's dynamic response speed to the coolant outlet pressure by adopting a self-adjusting correction factor control step and a closed-loop control step. It has good use effect and high safety, and can effectively avoid the problem of coolant leakage. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] The drawings that constitute part of this application are used to provide a further understanding of this application. The illustrative embodiments of this application and their descriptions are used to explain this application and do not constitute an improper limitation on this application. In the drawings:

[0032] FIG1 shows a schematic diagram of the specific structure of a liquid cooling circulation liquid supply system provided in an embodiment of the present application.

[0033] The above drawings include the following reference numerals: 10. Basic circulating liquid supply device; 11. Heat exchanger; 12. Circulating pump; 13. Filter; 14. Outlet pressure sensor; 15. Outlet temperature sensor; 16. First solenoid valve; 17. First flow valve; 18. Bypass branch; 181. Second solenoid valve; 182. Second flow valve; 20. Negative pressure circulating liquid supply device; 21. First liquid tank; 22. Second liquid tank; 23. Negative pressure generating assembly; 24. First input pipe; 25. First output pipe; 26. Second input pipe; 27. Second output pipe; 28. First connecting valve; 29. ​​Second connecting valve; 30. Switching assembly; 31. First on-off valve; 32. Second on-off valve; 33. Third on-off valve; 34. Fourth on-off valve; 35. Fifth on-off valve; 40. Position to be cooled; 50. Circulating heat exchange equipment; 51. Heat exchange source; 52. On-off valve; 53. Circulating filter; 54. First circulating temperature sensor; 55. Second circulating temperature sensor. DETAILED DESCRIPTION

[0034] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is in no way intended to limit the present application and its application or use. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.

[0035] As shown in FIG1 , an embodiment of the present application provides a liquid cooling circulation liquid supply system, comprising: a basic circulation liquid supply device 10, comprising a heat exchanger 11 and a circulation pump 12 connected by a pipeline; a negative pressure circulation liquid supply device 20, comprising a liquid tank and a negative pressure generating component 23 connected by a pipeline, the negative pressure generating component 23 being used to adjust the pressure in the accommodating cavity inside the liquid tank to a negative pressure; a switching component 30 for controlling the on-off between the basic circulation liquid supply device 10 and the negative pressure circulation liquid supply device 20; wherein the liquid cooling circulation liquid supply system has Basic circulation mode and negative pressure circulation mode. In the basic circulation mode, the switching component 30 disconnects the connection between the basic circulation liquid supply device 10 and the negative pressure circulation liquid supply device 20, and the circulation pump 12 drives the coolant to circulate heat at positive pressure along the pipeline between the position to be cooled 40 and the heat exchanger 11; in the negative pressure circulation mode, the switching component 30 connects the basic circulation liquid supply device 10 and the negative pressure circulation liquid supply device 20, and the negative pressure generating component 23 drives the coolant to circulate heat at negative pressure along the pipeline between the position to be cooled 40 and the heat exchanger 11.

[0036] The present application creates a combined liquid cooling circulation liquid supply system by setting up a basic circulation liquid supply device 10 and a negative pressure circulation liquid supply device 20 to work together. By switching the component 30, the present application can use the basic circulation liquid supply device 10 alone as a conventional positive pressure CDU, or can use the basic circulation liquid supply device 10 and the negative pressure circulation liquid supply device 20 together as a negative pressure CDU; the basic circulation liquid supply device 10 and the negative pressure circulation liquid supply device 20 can be maintained separately; the system complexity of the present application is low, and the maintenance difficulty is greatly reduced; when one of the basic circulation liquid supply device 10 and the negative pressure circulation liquid supply device 20 fails, the system complexity is greatly reduced, and the maintenance difficulty is greatly reduced. Even if a fault occurs, the liquid cooling circulation supply system can still work normally, thereby improving the working reliability of the system; this application can greatly reduce the difficulty of system maintenance and installation deployment, reduce operation and maintenance costs, and is suitable for large-scale promotion and use; the liquid cooling circulation supply system proposed in this application can be used in conjunction with related liquid cooling circulation supply methods in the future, which can not only effectively solve the problem that related negative pressure liquid cooling systems are usually unable to adjust the pressure, but also improve the system's dynamic response speed to the coolant outlet pressure by adopting self-adjusting correction factor control steps and closed-loop control steps. It has good use effect and high safety, and can effectively avoid the problem of coolant leakage.

[0037] It should be noted that the switching assembly 30 is connected to the basic circulating liquid supply device 10 and the negative pressure circulating liquid supply device 20 through pipelines respectively; the circulating pump 12 is used to drive the coolant to circulate along the pipelines for heat exchange.

[0038] As shown in FIG1 , in the negative pressure circulation mode, the negative pressure generating assembly 23 and the circulation pump 12 simultaneously drive the coolant to circulate heat at negative pressure along the pipeline between the position to be cooled 40 and the heat exchanger 11 .

[0039] It should be noted that: when the liquid cooling circulation liquid supply system proposed in this application is used as a negative pressure system (i.e., in the negative pressure circulation mode), the pressure difference generated by the negative pressure generating component 23 in the negative pressure circulation liquid supply device 20 also needs to be partially used to overcome the flow resistance of the heat exchanger 11, filter 13 and other components in the basic circulation liquid supply device 10; this application simultaneously drives the coolant to circulate heat at negative pressure along the pipeline between the cooling position 40 and the heat exchanger 11 by setting a negative pressure generating component 23 and a circulation pump 12, effectively utilizing the circulation pump 12 in the basic circulation liquid supply device 10 to assist in overcoming the above-mentioned flow resistance, thereby ensuring the smooth flow of the coolant in the negative pressure circulation mode.

[0040] In a specific embodiment of the present application, the negative pressure generating component 23 can use an existing air pump to save costs.

[0041] As shown in Figure 1, two liquid tanks are provided: a first liquid tank 21 and a second liquid tank 22. These are connected to a negative pressure generating assembly 23 via pipelines. By controlling the pressure within the first liquid tank 21 and the pressure within the second liquid tank 22, the reciprocating flow of the coolant is controlled. By providing the first and second liquid tanks 21, 22, a simple structure achieves a pressure differential design for the negative pressure system and ensures reliable operation of the negative pressure circulating liquid supply device 20.

[0042] Specifically, the pressure in the first liquid tank 21 is a first negative pressure, and the pressure in the second liquid tank 22 is a second negative pressure; when the liquid level height in the first liquid tank 21 does not exceed the set height, the first negative pressure is less than the second negative pressure, and the second negative pressure is less than or equal to the external air pressure; the heat exchanger 11 and the position to be cooled 40 are connected between the first liquid tank 21 and the second liquid tank 22 through a pipeline, and the coolant enters the first liquid tank 21 from the second liquid tank 22 through the pressure difference between the first negative pressure and the second negative pressure.

[0043] Optionally, the negative pressure circulation liquid supply device 20 further includes a liquid level gauge for detecting the liquid level of the coolant in the accommodating chamber. When the liquid level gauge detects that the liquid level in the first liquid tank 21 exceeds a set height, the first negative pressure is controlled to be greater than the second negative pressure, and the first negative pressure is controlled to be less than or equal to the external air pressure, so that the coolant flows from the first liquid tank 21 into the second liquid tank 22. By providing the liquid level gauge and controlling the relative changes of the first negative pressure and the second negative pressure, reciprocating circulation of the coolant between the first liquid tank 21 and the second liquid tank 22 is achieved.

[0044] As shown in Figure 1, the switching assembly 30 includes a first switch valve 31, a second switch valve 32, a third switch valve 33, a fourth switch valve 34 and a fifth switch valve 35; the first switch valve 31 is arranged on the circulation pipeline in the basic circulation liquid supply device 10, and is used to control the on-off of the circulation pipeline of the basic circulation liquid supply device 10; the negative pressure circulation liquid supply device 20 also includes a first input pipe 24, a first output pipe 25, a second input pipe 26 and a second output pipe 27; one end of the first input pipe 24 and one end of the first output pipe 25 are respectively connected to the first liquid tank 21, the second switch valve 32 is arranged on the first input pipe 24, and the third switch valve 33 is arranged on the first output pipe 25; one end of the second input pipe 26 and the second output pipe 27 are connected One end of the two output pipes 27 is respectively connected to the second liquid tank 22, the fourth switch valve 34 is arranged on the second input pipe 26, and the fifth switch valve 35 is arranged on the second output pipe 27; the other end of the first input pipe 24 and the other end of the second input pipe 26 are respectively connected to the pipeline at one end of the first switch valve 31, and the other end of the first output pipe 25 and the other end of the second output pipe 27 are respectively connected to the pipeline at the other end of the first switch valve 31; wherein, in the basic circulation mode, the second switch valve 32, the third switch valve 33, the fourth switch valve 34 and the fifth switch valve 35 are all in the closed state, and the first switch valve 31 is opened to disconnect the basic circulation liquid supply device 10 and the negative pressure circulation liquid supply device 20.

[0045] Through the above design, effective control of the flow of each pipeline is achieved, and the switching function of the switching component 30 is realized with a simple structure.

[0046] As shown in Figure 1, in the negative pressure circulation mode, the first negative pressure is less than the second negative pressure, and the second negative pressure is less than or equal to the external air pressure, the second switch valve 32 and the fifth switch valve 35 are in the open state, and the first switch valve 31, the third switch valve 33 and the fourth switch valve 34 are in the closed state; the coolant enters the pipeline at the other end of the first switch valve 31 from the second liquid tank 22 and the second output pipe 27, and passes through the heat exchanger 11, the position to be cooled 40, the pipeline at one end of the first switch valve 31 and the first input pipe 24 to enter the first liquid tank 21 or, in the negative pressure circulation mode, the first negative pressure is greater than the second negative pressure, and the first negative pressure is less than or equal to the external air pressure, the third switch valve 33 and the fourth switch valve 34 are in the open state, and the first switch valve 31, the second switch valve 32 and the fifth switch valve 35 are in the closed state; the coolant enters the pipeline at the other end of the first switch valve 31 from the first liquid tank 21 and the first output pipe 25, and passes through the heat exchanger 11, the position to be cooled 40, the pipeline at one end of the first switch valve 31 and the second input pipe 26 in sequence to enter the second liquid tank 22.

[0047] Such arrangement ensures that, in the negative pressure circulation mode, regardless of whether the coolant flows from the first liquid tank 21 to the second liquid tank 22 or from the second liquid tank 22 to the first liquid tank 21, the flow direction of the coolant in the circulation pipeline of the basic circulation liquid supply device 10 remains unchanged; for example: as shown in Figure 1, the coolant flows from the left side to the right side of the circulation pump 12, thereby ensuring that the circulation pump 12 always does useful work on the flow of the coolant when the circulation pump 12 is working, helping the coolant to overcome the flow resistance of components such as the heat exchanger 11 and the filter 13.

[0048] As shown in Figure 1, the negative pressure circulation liquid supply device 20 also includes a first connecting valve 28 and a second connecting valve 29. One end of the first connecting valve 28 is connected to the accommodating chamber of the first liquid tank 21 through a pipeline, and the other end is connected to the external atmosphere; one end of the second connecting valve 29 is connected to the accommodating chamber of the second liquid tank 22 through a pipeline, and the other end is connected to the external atmosphere; the negative pressure generating component 23 can be connected to the accommodating chambers of the first liquid tank 21 and the second liquid tank 22 respectively.

[0049] By providing the first connecting valve 28 and the second connecting valve 29 , it is ensured that the first liquid tank 21 and the second liquid tank 22 are connected to the external atmosphere in an openable and shuttable manner, thereby providing structural and functional support for the internal air pressure changes of the first liquid tank 21 and the second liquid tank 22 .

[0050] As shown in FIG1 , the basic circulating liquid supply device 10 further includes: a filter 13, an outlet pressure sensor 14, an outlet temperature sensor 15, a first solenoid valve 16, a first flow valve 17, a bypass branch 18, a second solenoid valve 181 and a second flow valve 182; the outlet of the heat exchanger 11, the circulating pump 12, the filter 13, the first flow valve 17, the outlet temperature sensor 15, the outlet pressure sensor 14, the first solenoid valve 16, and the inlet of the position to be cooled 40 are connected in sequence through pipelines; the outlet pressure sensor 14 is used to detect the pressure of the coolant at the outlet of the pipeline to obtain the outlet pressure; the first solenoid valve 16 is used to control the on-off of the pipeline of the basic circulating liquid supply device 10, and the first flow valve 17 is used to adjust the pipeline flow of the basic circulating liquid supply device 10; the bypass branch 18 is arranged in parallel with the position to be cooled 40, and is used to divert the flow to the position to be cooled 40; the second solenoid valve 181 and the second flow valve 182 are arranged on the bypass branch 18 in sequence, the second solenoid valve 181 is used to control the on-off of the bypass branch 18, and the second flow valve 182 is used to adjust the flow of the bypass branch 18; the outlet of the position to be cooled 40 is connected to the switching component 30 and the inlet of the heat exchanger 11 through a pipeline to allow the coolant to circulate.

[0051] This arrangement not only ensures the working reliability of the basic circulating liquid supply device, but also simplifies the structure of the basic circulating liquid supply device, making it easier to assemble and subsequently maintain; by setting the bypass branch 18, the coolant diversion for the position to be cooled 40 is achieved, thereby achieving flow control at the position to be cooled 40.

[0052] As shown in Figure 1, the heat exchanger 11 has a basic circulation pipeline and a circulation heat exchange pipeline arranged at intervals, and the basic circulation pipeline is connected to the circulation pump 12; the liquid cooling circulation liquid supply system also includes a circulation heat exchange device 50, and the circulation heat exchange device 50 includes a heat exchange source 51 for exchanging heat with the external environment, an on-off valve 52 for controlling the on-off of the pipeline, a circulation filter 53, a first circulation temperature sensor 54 and a second circulation temperature sensor 55. One end of the heat exchange source 51, the first circulation temperature sensor 54, the on-off valve 52, and one end of the circulation heat exchange pipeline are connected in sequence through the pipeline; the other end of the circulation heat exchange pipeline, the circulation filter 53, the second circulation temperature sensor 55, and the other end of the heat exchange source 51 are connected in sequence through the pipeline; the heat source 51 exchanges heat with the basic circulation pipeline through the circulation heat exchange pipeline.

[0053] By providing the circulating heat exchange device 50 , the heat exchange efficiency between the heat exchanger 11 and the outside is further improved, thereby improving the overall heat exchange effect of the liquid-cooling circulating liquid supply system.

[0054] Specifically, the liquid-cooling circulating liquid supply system also includes a central control terminal and an altitude sensor for detecting the altitude of the location of the negative pressure circulating liquid supply device 20. The altitude sensor is electrically connected to the central control terminal, and the central control terminal calculates the external environmental atmospheric pressure based on the altitude detected by the altitude sensor; as shown in Figure 1, the liquid-cooling circulating liquid supply system also includes an alarm and an outlet pressure sensor 14. The alarm is electrically connected to the central control terminal for issuing an alarm message; the outlet pressure sensor 14 is arranged at the outlet of the pipeline and is electrically connected to the central control terminal; the outlet pressure sensor 14 is used to detect the outlet pressure; the circulating pump 12 and the negative pressure generating component 23 are respectively electrically connected to the central control terminal, and the central control terminal controls the circulating pump 12 and the negative pressure generating component 23 to work in coordination according to the outlet pressure, the calculated external environmental atmospheric pressure and the outlet pressure setting value.

[0055] By setting up a central control terminal and an altitude sensor, real-time detection of the altitude of the location of the negative pressure circulation liquid supply device 20 is achieved, and structural support is provided for the subsequent calculation of the external air pressure Po by the central control terminal; by setting up an alarm and an outlet pressure sensor 14, real-time detection of the outlet pressure is achieved, and an alarm can be issued in time when the system operates abnormally, thereby ensuring safety.

[0056] The present application also provides a liquid cooling circulation liquid supply method, which is applied to the above-mentioned liquid cooling circulation liquid supply system; the liquid cooling circulation liquid supply method includes: a basic circulation liquid supply step: using a circulation pump 12 to drive the coolant to circulate heat exchange at a positive pressure between the position to be cooled 40 and the heat exchanger 11; a negative pressure circulation liquid supply step: using a negative pressure generating component 23 and / or a circulation pump 12 to drive the coolant to circulate heat exchange at a negative pressure along the pipeline between the position to be cooled 40 and the heat exchanger 11.

[0057] The liquid-cooling circulation liquid supply method proposed in this application, by setting a basic circulation liquid supply step and a negative pressure circulation liquid supply step, enables the basic circulation liquid supply device 10 to be used as a conventional positive pressure CDU, and the basic circulation liquid supply device 10 and the negative pressure circulation liquid supply device 20 can also be used together as a negative pressure CDU.

[0058] As shown in Figure 1, there are two liquid tanks, namely the first liquid tank 21 and the second liquid tank 22. The first liquid tank 21 and the second liquid tank 22 are respectively connected to the negative pressure generating component 23 through pipelines; the pressure in the first liquid tank 21 is the first negative pressure, and the pressure in the second liquid tank 22 is the second negative pressure; the negative pressure circulation liquid supply step also includes a negative pressure switching step: first control the first negative pressure to be less than the second negative pressure, and the second negative pressure is less than or equal to the external air pressure, so that the coolant enters the first liquid tank 21 from the second liquid tank 22; detect the liquid level height in the first liquid tank 21, and when it exceeds the set height, control the first negative pressure to be greater than the second negative pressure, and the first negative pressure is less than or equal to the external air pressure, so that the coolant enters the second liquid tank 22 from the first liquid tank 21.

[0059] This arrangement completes the design of the method of utilizing the pressure difference working process of the negative pressure system and ensures that the negative pressure circulation liquid supply device 20 works reliably.

[0060] Optionally, the external air pressure Po is calculated according to the following formula: Po = P0*[1-(0.0065*H) / 288.15]5.255; wherein P0 is the standard atmospheric pressure, and H is the altitude of the location of the negative pressure circulation liquid supply device 20.

[0061] By setting the above calculation formula and using the altitude of the location of the negative pressure circulation liquid supply device 20 as a variable, the external air pressure Po with higher accuracy is calculated, thereby providing a reference for the subsequent high-precision outlet pressure control.

[0062] Specifically, the liquid cooling circulation supply method also includes a hydraulic control step; detecting the pressure of the coolant at the pipeline outlet to obtain the outlet pressure, comparing the outlet pressure with the outlet pressure set value, and controlling the circulation pump 12 and / or the negative pressure generating component 23 to work together to adjust the outlet pressure.

[0063] By setting up the hydraulic control steps, the liquid cooling circulation supply system proposed in this application has self-correction and self-regulation functions, thereby enabling the liquid cooling circulation supply system to regulate and control the cooling liquid circulation pressure with higher precision.

[0064] Optionally, the hydraulic control step includes a self-adjusting correction factor control step and a closed-loop control step; the outlet pressure is compared with the outlet pressure setting value to calculate the actual error, and when the absolute value of the actual error is greater than the first error, the self-adjusting correction factor control step is executed to adjust the outlet pressure; when the absolute value of the actual error is less than the first error and greater than the second error, the closed-loop control step is executed to adjust the outlet pressure.

[0065] By setting up self-adjusting correction factor control steps and closed-loop control steps, the robustness of the liquid-cooled circulating supply system is further improved. When the liquid-cooled circulating supply system faces abnormal or changing internal pressures, it can maintain stable and good pressure control capabilities. A highly robust system can maintain stable performance in the face of abnormal situations and will not cause system crashes or performance degradation due to changes in coolant pressure or incorrect detection parameters.

[0066] It should be noted that: in order to ensure the robustness of the liquid cooling circulation supply system, sufficient testing and verification are usually required to obtain various correction parameters and empirical values ​​to calibrate the various parameters in the system to ensure that the system can maintain good performance under different circumstances; in addition, the method of this application can subsequently help improve the robustness of the system through the design of appropriate algorithm formulas (such as the specific calculation formulas of the self-adjusting correction factor control step and the closed-loop control step).

[0067] Optionally, the self-adjusting correction factor control step includes:

[0068] When ︱E︱>Eb, U=-Ku

αE+(1-α)EC

[0069] Adjust the power of the circulating pump 12 and / or the negative pressure generating component 23 according to the size of U; wherein E is the actual error, Eb is the first error, Ku is the proportional coefficient, α=(αs-α0)︱E︱ / N+α0, 0<α0<α<αs<1, set the domain of E, EC and U to (-N, ..., -1, 0, 1, ..., N), N=20.

[0070] It should be noted that the selection of the first error Eb is flexibly selected based on the staff's experience and the accuracy required for the actual outlet pressure of the system; the proportional coefficient Ku is also set as an experience value; the same is true for the settings of α0, α and αs.

[0071] Optionally, the closed-loop control step includes: when Ea<︱E︱<Eb, U=Kp

e(k)-e(k-1)

e(k)-2e(k-1)+e(k-2)

[0072] Adjust the power of the circulating pump 12 and / or the negative pressure generating component 23 according to the size of U; wherein Ea is the second error, E is the actual error, Eb is the first error, Kp is the proportional coefficient, Ki is the integral coefficient, Kd is the differential coefficient, and e(k) is the actual error at the kth sampling.

[0073] It is worth noting that in a specific embodiment of the present application, the closed-loop control step adopts the logic of the PID control step; the selection of the proportional coefficient Kp, the integral coefficient Ki, and the differential coefficient Kd usually needs to be determined through debugging and optimization. Generally speaking, the selection of these three coefficients needs to consider factors such as the dynamic characteristics, stability, and response speed of the system;

[0074] The proportional coefficient Kp (i.e. P) is usually used to adjust the static error of the system. Its selection needs to be determined based on the static characteristics of the system. If the static error of the system is large, the proportional coefficient needs to be increased to increase the control strength, otherwise the proportional coefficient needs to be reduced.

[0075] The integral coefficient Ki (i.e. I) is used to eliminate the integral error of the system and has a certain regulating effect on the static error and dynamic error of the system. The selection of the integral coefficient Ki needs to be determined according to the dynamic characteristics and stability of the system. Generally speaking, if the integral error of the system is large or the system has a large static error, the integral coefficient needs to be increased.

[0076] The differential coefficient Kd (i.e. D) is used to suppress system oscillation and improve the system response speed. The selection of the differential coefficient needs to be determined based on the dynamic characteristics and stability of the system. If the system oscillates or responds slowly, the differential coefficient needs to be increased.

[0077] In summary, in the actual application of this application, it is usually necessary to determine the appropriate values ​​of the proportional coefficient Kp, the integral coefficient Ki and the differential coefficient Kd through specific experiments and debugging; these three coefficients can be adjusted by observing the response characteristics and stability of the system to achieve the best control effect of the system; at the same time, some existing automatic adjustment algorithms can also be used to assist in determining the values ​​of these three coefficients.

[0078] Optionally, the hydraulic control step further includes a repetition step: when the absolute value of the actual error is equal to the first error or less than or equal to the second error, if the step preceding the repetition step is a self-adjusting correction factor control step or a closed-loop control step, the step preceding the repetition step is repeated to adjust the outlet pressure; if the step preceding the repetition step is not preceded by a self-adjusting correction factor control step or a closed-loop control step, the status quo is maintained. By providing the repetition step, excessive system switching caused by frequent changes in control strategies is effectively prevented, i.e., frequent system switching between the self-adjusting correction factor control step or the closed-loop control step is avoided; when the absolute value of the actual error is equal to the first error or less than or equal to the second error, the system does not switch steps and can maintain the previous action or the status quo, thereby ensuring the operational stability of the system.

[0079] Optionally, when the previous step of the repeated step is a self-adjusting correction factor control step or a closed-loop control step, and ︱E︱=Eb or ︱E︱≤Ea, U=u0, where Ea is the second error, E is the actual error, Eb is the first error, and u0 is the self-adjusting correction factor control step or the closed-loop control step before the repeated step.

[0080] In a specific embodiment of the present application, the outlet pressure is regulated by the circulation pump 12, the first solenoid valve 16 and the first flow valve 17; the detailed process of the control method is as follows:

[0081] Step 1: Get the outlet pressure setting value P1;

[0082] Step 2: Obtain the outlet pressure P2 detected by the outlet pressure sensor 14 in real time;

[0083] Step 3: Compare P1 with P2. If the pressure difference between P1 and P2 is within 5kPa, adjust the opening of the first flow valve 17. When P1=P2, the opening of the first flow valve 17 remains unchanged, and return to step 1 after waiting for 3S. When P1>P2, reduce the opening of the first flow valve 17 by 0.5%, and then compare P1 with P2. If the outlet pressure P2 is equal to the outlet pressure setting value P1, the adjustment is completed, and return to step 1 after waiting for 3S, otherwise return to step 3. When P1<P2, increase the opening of the first flow valve 17 by 0.5%, and then compare P1 with P2. If the outlet pressure P2 is equal to the outlet pressure setting value P1, the adjustment is completed, and return to step 1 after waiting for 3S, otherwise return to step 3.

[0084] Step 4: If the pressure difference between P1 and P2 is above 5Kpa, adjust the speed of the circulating pump 12 to adjust the outlet pressure P2; when P1>P2, reduce the speed of the circulating pump 12 by 2%, and then compare P1 and P2. If the outlet pressure P2 is equal to the outlet pressure setting value P1, the adjustment is completed, wait for 3S and return to step 1, otherwise return to step 3; when P1<P2, increase the speed of the circulating pump 12 by 2%, and then compare P1 and P2. If the outlet pressure P2 is equal to the outlet pressure setting value P1, the adjustment is completed, wait for 3S and return to step 1, otherwise return to step 3.

[0085] Specifically, the liquid-cooling circulation liquid supply method also includes a fault control step: when a fault is detected in the negative pressure circulation liquid supply device 20, an alarm message is issued, and the liquid-cooling circulation liquid supply system is switched to operate in the basic circulation mode; when a fault is detected in the circulation pump 12 in the basic circulation liquid supply device 10, an alarm message is issued, and the liquid-cooling circulation liquid supply system is switched to operate in the negative pressure circulation mode.

[0086] In a specific embodiment of the present application, when a component in the negative pressure circulating liquid supply device 20 or the basic circulating liquid supply device 10 fails, the system operates as follows:

[0087] 1. When the negative pressure circulating liquid supply device 20 fails, the system will sound an alarm, prompting the operation and maintenance personnel to perform maintenance. The first switch valve 31 is opened, the second switch valve 32, the third switch valve 33, the fourth switch valve 34 and the fifth switch valve 35 are closed, and the system operates as a positive pressure CDU system;

[0088] 2. When the circulation pump 12 in the basic circulation liquid supply device 10 fails, the system alarms and prompts the operation and maintenance personnel to perform maintenance; the system still uses the negative pressure circulation liquid supply device 20 or the basic circulation liquid supply device 10 to cooperate with the working mode (for example: negative pressure circulation mode), and the outlet pressure regulation relies on the first solenoid valve 16 and the first flow valve 17 for regulation.

[0089] In summary, the present application provides a liquid-cooling circulation liquid supply system and a liquid-cooling circulation liquid supply method. The present application creates a combined liquid-cooling circulation liquid supply system by setting a basic circulation liquid supply device 10 and a negative pressure circulation liquid supply device 20 to work together. By switching the component 30, the present application can use the basic circulation liquid supply device 10 alone as a conventional positive pressure CDU, or can use the basic circulation liquid supply device 10 and the negative pressure circulation liquid supply device 20 together as a negative pressure CDU; the basic circulation liquid supply device 10 and the negative pressure circulation liquid supply device 20 can be maintained separately; the system complexity of the present application is low, and the maintenance difficulty is greatly reduced; when the basic circulation liquid supply device 10 and the negative pressure circulation liquid supply device 20 are used together, the basic circulation liquid supply device 10 and the negative pressure circulation liquid supply device 20 can be maintained separately; the system complexity of the present application is low, and the maintenance difficulty is greatly reduced; when the basic circulation liquid supply device 10 and the negative pressure circulation liquid supply device 20 are used together, the basic circulation liquid supply device 10 and the negative pressure circulation liquid supply device 20 can be used together as a negative pressure CDU; ... If one of the negative pressure circulation liquid supply devices 20 fails, the liquid cooling circulation liquid supply system can still operate normally, thereby improving the working reliability of the system; the present application can greatly reduce the difficulty of system maintenance and installation deployment, reduce operation and maintenance costs, and is suitable for large-scale promotion and use; the liquid cooling circulation liquid supply system proposed in the present application can be subsequently combined with related liquid cooling circulation liquid supply methods, which can not only effectively solve the problem that the related negative pressure liquid cooling system is usually unable to adjust the pressure, but also improve the system's dynamic response speed to the coolant outlet pressure by adopting a self-adjusting correction factor control step and a closed-loop control step, which has good use effect and high safety, and can effectively avoid the problem of coolant leakage.

[0090] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, they indicate the presence of features, steps, operations, devices, components and / or combinations thereof.

[0091] Unless otherwise specified, the relative arrangement of the parts and steps, numerical expressions and numerical values ​​set forth in these embodiments do not limit the scope of the present application. Meanwhile, it should be understood that, for ease of description, the sizes of the various parts shown in the accompanying drawings are not drawn according to actual proportional relationships. Technology, methods and equipment known to those of ordinary skill in the relevant art may not be discussed in detail, but in appropriate cases, the technology, methods and equipment should be considered as a part of the specification. In all examples shown and discussed here, any specific value should be interpreted as being merely exemplary, rather than as a limitation. Therefore, other examples of exemplary embodiments can have different values. It should be noted that similar numbers and letters represent similar items in the following drawings, and therefore, once an item is defined in an accompanying drawing, it does not need to be further discussed in subsequent drawings.

[0092] In the description of this application, it should be understood that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "horizontal, vertical, vertical, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the device or element referred to must have a specific direction or be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the scope of protection of this application; the directional words "inside and outside" refer to the inside and outside relative to the outline of each component itself.

[0093] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used herein to describe the spatial positional relationship of a device or feature to other devices or features as shown in the figures. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figures. For example, if the device in the drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0094] In addition, it should be noted that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of this application.

[0095] The above description is merely a preferred embodiment of the present application and is not intended to limit the present application. Various modifications and variations are possible for those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present application shall be included within the scope of protection of the present application.

Claims

1. A liquid cooling circulation liquid supply system, characterized in that: include: A basic circulating liquid supply device (10) includes a heat exchanger (11) and a circulating pump (12) connected through a pipeline; A negative pressure circulating liquid supply device (20) comprises a liquid tank and a negative pressure generating assembly (23) connected via a pipeline, wherein the negative pressure generating assembly (23) is configured to adjust the pressure in the accommodating chamber inside the liquid tank to a negative pressure; a switching assembly (30) configured to control the on / off switching between the basic circulating liquid supply device (10) and the negative pressure circulating liquid supply device (20); The liquid cooling circulation liquid supply system has a basic circulation mode and a negative pressure circulation mode. In the basic circulation mode, the switching component (30) disconnects the connection between the basic circulation liquid supply device (10) and the negative pressure circulation liquid supply device (20), and the circulation pump (12) drives the coolant to circulate heat at a positive pressure along the pipeline between the position to be cooled (40) and the heat exchanger (11); in the negative pressure circulation mode, the switching component (30) connects the basic circulation liquid supply device (10) and the negative pressure circulation liquid supply device (20), and the negative pressure generating component (23) drives the coolant to circulate heat at a negative pressure along the pipeline between the position to be cooled (40) and the heat exchanger (11).

2. The liquid cooling circulation supply system according to claim 1, characterized in that: In the negative pressure circulation mode, the negative pressure generating assembly (23) and the circulation pump (12) simultaneously drive the coolant to circulate heat at negative pressure along the pipeline between the position to be cooled (40) and the heat exchanger (11).

3. The liquid cooling circulation supply system according to claim 1, characterized in that: There are two liquid tanks, namely a first liquid tank (21) and a second liquid tank (22). The first liquid tank (21) and the second liquid tank (22) are respectively connected to the negative pressure generating component (23) through pipelines; by controlling the changes in the pressure in the first liquid tank (21) and the pressure in the second liquid tank (22), the reciprocating flow of the cooling liquid is controlled.

4. The liquid cooling circulation liquid supply system according to claim 3, characterized in that: The pressure in the first liquid tank (21) is a first negative pressure, and the pressure in the second liquid tank (22) is a second negative pressure; when the liquid level in the first liquid tank (21) does not exceed a set height, the first negative pressure is less than the second negative pressure, and the second negative pressure is less than or equal to the external air pressure; the heat exchanger (11) and the position to be cooled (40) are connected between the first liquid tank (21) and the second liquid tank (22) through a pipeline, and the coolant enters the first liquid tank (21) from the second liquid tank (22) through the pressure difference between the first negative pressure and the second negative pressure.

5. The liquid cooling circulation supply system according to claim 4, characterized in that: The negative pressure circulation liquid supply device (20) further includes a liquid level gauge, which is configured to detect the liquid level of the coolant in the accommodating chamber; when the liquid level gauge detects that the liquid level in the first liquid tank (21) exceeds a set height, the first negative pressure is controlled to be greater than the second negative pressure, and the first negative pressure is less than or equal to the external air pressure, so that the coolant flows from the first liquid tank (21) into the second liquid tank (22).

6. The liquid cooling circulation supply system according to claim 5, characterized in that: The switching assembly (30) includes a first switch valve (31), a second switch valve (32), a third switch valve (33), a fourth switch valve (34) and a fifth switch valve (35); the first switch valve (31) is arranged on the circulation pipeline of the basic circulation liquid supply device (10) and is configured to control the on-off of the circulation pipeline of the basic circulation liquid supply device (10); the negative pressure circulation liquid supply device (20) also includes a first input pipe (24), a first output pipe (25), a second input pipe (26) and a second output pipe (27); one end of the first input pipe (24) and one end of the first output pipe (25) are respectively connected to the first liquid tank (21), and the second switch valve (32) is arranged on the On the first input pipe (24), the third switch valve (33) is arranged on the first output pipe (25); one end of the second input pipe (26) and one end of the second output pipe (27) are respectively communicated with the second liquid tank (22), the fourth switch valve (34) is arranged on the second input pipe (26), and the fifth switch valve (35) is arranged on the second output pipe (27); the other end of the first input pipe (24) and the other end of the second input pipe (26) are respectively communicated with the pipeline at one end of the first switch valve (31), and the other end of the first output pipe (25) and the other end of the second output pipe (27) are respectively communicated with the pipeline at the other end of the first switch valve (31); Wherein, in the basic circulation mode, the second switch valve (32), the third switch valve (33), the fourth switch valve (34) and the fifth switch valve (35) are all in a closed state, and the first switch valve (31) is opened to disconnect the basic circulation liquid supply device (10) and the negative pressure circulation liquid supply device (20).

7. The liquid cooling circulation supply system according to claim 6, characterized in that: In the negative pressure circulation mode, the first negative pressure is less than the second negative pressure, and the second negative pressure is less than or equal to the external air pressure, the second switch valve (32) and the fifth switch valve (35) are in an open state, and the first switch valve (31), the third switch valve (33) and the fourth switch valve (34) are in a closed state; the coolant enters the pipeline at the other end of the first switch valve (31) from the second liquid tank (22) and the second output pipe (27), and passes through the heat exchanger (11), the position to be cooled (40), the pipeline at one end of the first switch valve (31) and the first input pipe (24) in sequence and enters the first liquid tank (21); Alternatively, in the negative pressure circulation mode, the first negative pressure is greater than the second negative pressure, and the first negative pressure is less than or equal to the external air pressure, the third switch valve (33) and the fourth switch valve (34) are in an open state, and the first switch valve (31), the second switch valve (32) and the fifth switch valve (35) are in a closed state; the coolant enters the pipeline at the other end of the first switch valve (31) from the first liquid tank (21) and the first output pipe (25), and passes through the heat exchanger (11), the position to be cooled (40), the pipeline at one end of the first switch valve (31) and the second input pipe (26) in sequence to enter the second liquid tank (22).

8. The liquid cooling circulation supply system according to claim 3, characterized in that: The negative pressure circulation liquid supply device (20) further includes a first connecting valve (28) and a second connecting valve (29), wherein one end of the first connecting valve (28) is connected to the accommodating chamber of the first liquid tank (21) through a pipeline, and the other end is connected to the external atmosphere; one end of the second connecting valve (29) is connected to the accommodating chamber of the second liquid tank (22) through a pipeline, and the other end is connected to the external atmosphere; the negative pressure generating assembly (23) can be connected to the accommodating chambers of the first liquid tank (21) and the second liquid tank (22) in a switchable manner.

9. The liquid cooling circulation supply system according to claim 1, characterized in that: The basic circulating liquid supply device (10) further comprises: a filter (13), an outlet pressure sensor (14), an outlet temperature sensor (15), a first solenoid valve (16), a first flow valve (17), a bypass branch (18), a second solenoid valve (181) and a second flow valve (182); the outlet of the heat exchanger (11), the circulating pump (12), the filter (13), the first flow valve (17), the outlet temperature sensor (15), the outlet pressure sensor (14), the first solenoid valve (16) and the inlet of the position to be cooled (40) are connected in sequence through a pipeline; the outlet pressure sensor (14) is configured to detect the pressure of the coolant at the outlet of the pipeline to obtain the outlet pressure; the first solenoid valve (16) is configured to control the The pipeline of the basic circulating liquid supply device (10) is connected and disconnected, and the first flow valve (17) is configured to adjust the pipeline flow of the basic circulating liquid supply device (10); the bypass branch (18) is arranged in parallel with the position to be cooled (40) and is configured to divert the position to be cooled (40); the second solenoid valve (181) and the second flow valve (182) are sequentially arranged on the bypass branch (18), the second solenoid valve (181) is configured to control the connection and disconnection of the bypass branch (18), and the second flow valve (182) is configured to adjust the flow of the bypass branch (18); the outlet of the position to be cooled (40) is connected to the switching component (30) and the inlet of the heat exchanger (11) through a pipeline, so that the coolant circulates.

10. The liquid cooling circulation supply system according to claim 1, characterized in that: The heat exchanger (11) has a basic circulation pipeline and a circulation heat exchange pipeline arranged at intervals therein, and the basic circulation pipeline is connected to the circulation pump (12); the liquid cooling circulation liquid supply system also includes a circulation heat exchange device (50), the circulation heat exchange device (50) includes a heat exchange source (51) configured to exchange heat with the external environment, an on-off valve (52) configured to control the on-off of the pipeline, a circulation filter (53), a first circulation temperature sensor (54) and a second circulation temperature sensor (55); one end of the heat exchange source (51), the first circulation temperature sensor (54), the on-off valve (52) and one end of the circulation heat exchange pipeline are connected in sequence through a pipeline; the other end of the circulation heat exchange pipeline, the circulation filter (53), the second circulation temperature sensor (55) and the other end of the heat exchange source (51) are connected in sequence through a pipeline; the heat exchange source (51) exchanges heat with the basic circulation pipeline through the circulation heat exchange pipeline.

11. The liquid cooling circulation supply system according to claim 1, characterized in that: The liquid cooling circulation liquid supply system further comprises a central control terminal and an altitude sensor configured to detect the altitude of the location of the negative pressure circulation liquid supply device (20), the altitude sensor being electrically connected to the central control terminal, and the central control terminal calculating the external ambient atmospheric pressure based on the altitude detected by the altitude sensor; The liquid-cooling circulating liquid supply system also includes an alarm and an outlet pressure sensor (14), wherein the alarm is electrically connected to the central control terminal and is configured to issue an alarm message; the outlet pressure sensor (14) is arranged at the outlet of the pipeline and is electrically connected to the central control terminal; the outlet pressure sensor (14) is configured to detect the outlet pressure; the circulation pump (12) and the negative pressure generating component (23) are electrically connected to the central control terminal respectively, and the central control terminal controls the circulation pump (12) and the negative pressure generating component (23) to work in coordination according to the outlet pressure, the calculated external ambient atmospheric pressure and the outlet pressure setting value.

12. A liquid cooling circulation liquid supply method, characterized in that: The liquid cooling circulation liquid supply method is applied to the liquid cooling circulation liquid supply system according to any one of claims 1 to 11; The liquid cooling circulation liquid supply method comprises: Basic circulating liquid supply step: using the circulating pump (12) to drive the cooling liquid to circulate heat exchange at positive pressure between the position to be cooled (40) and the heat exchanger (11); Negative pressure circulation liquid supply step: using the negative pressure generating component (23) and / or the circulating pump (12) to drive the cooling liquid to circulate heat at negative pressure along the pipeline between the position to be cooled (40) and the heat exchanger (11).

13. The liquid cooling circulation liquid supply method according to claim 12, characterized in that: There are two liquid tanks, namely a first liquid tank (21) and a second liquid tank (22). The first liquid tank (21) and the second liquid tank (22) are respectively connected to the negative pressure generating component (23) through pipelines; the pressure in the first liquid tank (21) is a first negative pressure, and the pressure in the second liquid tank (22) is a second negative pressure; the negative pressure circulation liquid supply step also includes a negative pressure switching step: first controlling the first negative pressure to be less than the second negative pressure, and the second negative pressure to be less than or equal to the external air pressure, so that the coolant enters the first liquid tank (21) from the second liquid tank (22); detecting the liquid level height in the first liquid tank (21), and when it exceeds the set height, controlling the first negative pressure to be greater than the second negative pressure, and the first negative pressure to be less than or equal to the external air pressure, so that the coolant enters the second liquid tank (22) from the first liquid tank (21).

14. The liquid cooling circulation liquid supply method according to claim 13, characterized in that: The external air pressure Po is calculated according to the following formula: Po = P0*[1-(0.0065*H) / 288.15] 5.255 ; Wherein, P0 is the standard atmospheric pressure, and H is the altitude of the location of the negative pressure circulation liquid supply device (20).

15. The liquid cooling circulation liquid supply method according to claim 12, characterized in that: The liquid cooling circulation supply method further includes a hydraulic control step; detecting the pressure of the coolant at the pipeline outlet to obtain the outlet pressure, comparing the outlet pressure with the outlet pressure set value, and controlling the circulation pump (12) and / or the negative pressure generating component (23) to cooperate in operation to adjust the outlet pressure.

16. The liquid cooling circulation liquid supply method according to claim 15, characterized in that: The hydraulic control step includes a self-adjusting correction factor control step and a closed-loop control step; the outlet pressure is compared with the outlet pressure set value to calculate an actual error, and when the absolute value of the actual error is greater than a first error, the self-adjusting correction factor control step is executed to adjust the outlet pressure; When the absolute value of the actual error is smaller than the first error and larger than the second error, a closed-loop control step is executed to adjust the outlet pressure.

17. The liquid cooling circulation liquid supply method according to claim 16, characterized in that: The self-adjusting correction factor control step includes: when |E|>Eb, U=-Ku[αE+(1-α)EC], adjusting the power of the circulation pump (12) and / or the negative pressure generating component (23) according to the size of U; wherein E is the actual error, Eb is the first error, Ku is the proportional coefficient, α=(α s -α0)︱E︱ / N+α0,0<α0<α<α s <1, set the domain of E, EC and U to (-N, ..., -1, 0, 1, ..., N), N = 20.

18. The liquid cooling circulation liquid supply method according to claim 16, characterized in that: The closed-loop control step includes: when Ea<︱E︱<Eb, U=Kp【e(k)-e(k-1)】+Kie(k)+Kd【e(k)-2e(k-1)+e(k-2)】, adjusting the power of the circulation pump (12) and / or the negative pressure generating component (23) according to the size of U; wherein Ea is the second error, E is the actual error, Eb is the first error, Kp is the proportional coefficient, Ki is the integral coefficient, Kd is the differential coefficient, and e(k) is the actual error at the kth sampling.

19. The liquid cooling circulation liquid supply method according to claim 16, characterized in that: The hydraulic control step also includes a repetition step: when the absolute value of the actual error is equal to the first error or less than or equal to the second error, if the previous step of the repetition step is the self-adjusting correction factor control step or the closed-loop control step, the step before the repetition step is repeated to adjust the outlet pressure; if the self-adjusting correction factor control step and the closed-loop control step are not before the repetition step, the status quo is maintained.

20. The liquid cooling circulation liquid supply method according to claim 19, characterized in that: When the previous step of the repeated step is the self-adjusting correction factor control step or the closed-loop control step, and ︱E︱=Eb or ︱E︱≤Ea, U=u0, where Ea is the second error, E is the actual error, Eb is the first error, and u0 is the self-adjusting correction factor control step or the closed-loop control step before the repeated step.

21. The liquid cooling circulation liquid supply method according to claim 12, characterized in that: The liquid-cooling circulation liquid supply method further includes a fault control step: when a fault is detected in the negative pressure circulation liquid supply device (20), an alarm message is issued, and the liquid-cooling circulation liquid supply system is switched to operate in accordance with the basic circulation mode; when a fault is detected in the circulation pump (12) in the basic circulation liquid supply device (10), an alarm message is issued, and the liquid-cooling circulation liquid supply system is switched to operate in accordance with the negative pressure circulation mode.

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