A Leakage Monitoring Method and System for a Data Center CDU System

Abstract

The present invention provides a leakage monitoring method and system for a CDU system in a data center, relating to the technical field of CDU system leakage monitoring. The present invention obtains real-time monitored liquid leakage signals, water replenishment data, internal pressure data, and liquid level change data of a surge tank of the CDU system, and first preliminarily determines whether there is a liquid leakage risk according to the real-time monitored liquid leakage signals. When a liquid leakage risk is detected, further comprehensive analysis is performed by combining data such as the number of water replenishment times, internal pressure conditions, and liquid level changes of the surge tank to more accurately determine whether liquid leakage has occurred. The present invention effectively reduces the probabilities of false judgment and missed judgment through multi-dimensional data cross-verification, improves the accuracy and reliability of liquid leakage monitoring, and ensures the safe and stable operation of the CDU system in the data center.

Description

Technical Field

[0001] The present invention relates to the technical field of leakage monitoring of CDU systems, and more particularly, to a method and system for leakage monitoring of a CDU system in a data center. Background Art

[0002] As the core infrastructure in the information age, the data center undertakes the tasks of storing, processing, and transmitting massive amounts of data. Its stable operation is crucial for all fields of modern society. With the rapid development of information technology, the scale of data centers has been continuously expanding, and the requirements for cooling systems have also become increasingly high. The CDU (Cooling Distribution Unit) system, as a key component of the liquid cooling technology in data centers, is responsible for effectively distributing the cooling medium to each server cabinet or device to ensure that the equipment operates in a suitable temperature environment and prevent performance degradation, failures, or even equipment damage caused by overheating.

[0003] The CDU system usually consists of multiple complex components, including but not limited to pipe networks, valves, pumps, pressure stabilizing tanks, etc. The cooling medium circulates in the closed loop formed by these components to achieve heat transfer and dissipation. However, due to the long-term high-intensity operation of the CDU system, the pipe joints may become loose due to factors such as thermal expansion and contraction, vibration, etc. The valves may have poor sealing due to wear and aging, and the operation failure of the pump may also cause the leakage of the cooling medium. If these potential liquid leakage risk points cannot be detected and processed in a timely manner, it may lead to a large amount of loss of the cooling medium, thereby affecting the cooling effect of the entire data center. In severe cases, it may even cause serious consequences such as overheating shutdown of servers, bringing huge economic losses and data security risks to the operation of the data center.

[0004] In the field of liquid leakage detection of CDU systems in data centers, the following several methods can be used for liquid leakage monitoring:

[0005] Based on liquid leakage sensors: By arranging liquid leakage sensors, such as positioning leakage ropes, at key parts of the CDU system, when the cooling medium leaks and contacts the sensor, the sensor emits a signal to indicate the existence of a liquid leakage risk. This method can achieve real-time monitoring of local areas, with a certain degree of timeliness and accuracy. However, its monitoring range is relatively limited, and the liquid leakage in some hidden parts or areas not covered by the sensors may not be detected in a timely manner, resulting in a risk of missed judgment. In addition, if the sensor itself fails, is damaged, or is interfered by the outside world, it may produce false judgments, leading to unnecessary maintenance operations and waste of resources.

[0006] Leakage monitoring based on pressure sensors: Pressure sensors are installed in the pipeline network of the CDU system to monitor the pressure changes inside the system in real time. Under normal circumstances, the pressure within the CDU system should be maintained within a certain range. When leakage occurs, the system pressure will show a downward trend or abnormal conditions such as pressure mutations due to the loss of the cooling medium. However, the pressure changes can be affected by various factors, such as fluctuations in the system operating state, changes in the external environmental temperature, etc. Judging leakage only based on pressure data may lead to misjudgments. For example, during the startup or shutdown process of the system, normal pressure fluctuations may be mistaken for leakage, and the impact of some minor leaks on pressure may be relatively small in the early stage, making it difficult to accurately identify and there is a possibility of missed judgments.

[0007] Leakage monitoring based on the liquid level sensor by monitoring the liquid level change of the surge tank: Indirectly judge whether there is leakage by monitoring the liquid level change of the surge tank in the CDU system. When the cooling medium leaks, the liquid level of the surge tank may show a downward trend or reach a specific leakage volume threshold. However, the liquid level change can also be affected by other factors, such as the water replenishment operation of the system, the accuracy and stability of the liquid level sensor, etc. Relying solely on the liquid level change to judge leakage may result in misjudgments or missed judgments.

[0008] In summary, the existing leakage detection methods for data center CDU systems have certain limitations and deficiencies in practical applications, especially the problems of misjudgments and missed judgments are more prominent, and it is difficult to meet the high-precision and high-reliability requirements of data centers for CDU system leakage monitoring. Therefore, there is an urgent need for a leakage monitoring method and system that can integrate multiple data and effectively reduce the probability of misjudgments and missed judgments to improve the operating safety and stability of the data center CDU system and ensure the normal operation of the data center. Summary of the Invention

[0009] The present invention aims to solve at least one of the above technical problems existing in the prior art.

[0010] To this end, the first aspect of the present invention provides a leakage monitoring method for a data center CDU system.

[0011] The second aspect of the present invention provides a leakage monitoring system for a data center CDU system.

[0012] The present invention provides a leakage monitoring method for a data center CDU system, including:

[0013] Obtain the acquisition data of the CDU system, where the acquisition data includes the real-time monitored leakage signal of the CDU system, the water replenishment data of the CDU system, the internal pressure data of the CDU system, and the liquid level change data of the surge tank in the CDU system;

[0014] Based on the real-time monitored liquid leakage signal, preliminarily determine whether there is a liquid leakage risk in the CDU system;

[0015] When the real-time monitored liquid leakage signal indicates that there is a liquid leakage risk in the CDU system, determine whether the number of water replenishments of the CDU system exceeds the set number within a preset time period according to the water replenishment data of the CDU system. When it does not exceed the set number, it is determined that no liquid leakage has occurred in the CDU system;

[0016] When the number of water replenishments of the CDU system exceeds the set number within a preset time period, determine whether there is an abnormal pressure situation in the CDU system according to the internal pressure data of the CDU system. The abnormal pressure situation includes that the pressure is in a downward trend and / or the pressure suddenly changes; and determine whether the liquid leakage amount of the pressure stabilizing tank reaches the set value according to the liquid level change data of the pressure stabilizing tank in the CDU system; when there is an abnormal pressure situation and / or the liquid leakage amount of the pressure stabilizing tank reaches the set value, it is determined that liquid leakage has occurred in the CDU system, otherwise it is determined that no liquid leakage has occurred in the CDU system.

[0017] According to the leakage monitoring method of the data center CDU system of the above technical solution of the present invention, it may also have the following additional technical features:

[0018] In the above technical solution, when the real-time monitored liquid leakage signal indicates that there is no liquid leakage risk in the CDU system, determine whether there is an abnormal pressure situation in the CDU system according to the internal pressure data of the CDU system. The abnormal pressure situation includes that the pressure is in a downward trend and / or the pressure suddenly changes; and determine whether the liquid leakage amount of the pressure stabilizing tank reaches the set value according to the liquid level change data of the pressure stabilizing tank in the CDU system; when there is an abnormal pressure situation and the liquid leakage amount of the pressure stabilizing tank reaches the set value, it is determined that liquid leakage has occurred in the CDU system, otherwise it is determined that no liquid leakage has occurred in the CDU system.

[0019] In the above technical solution, determining whether there is an abnormal pressure situation where the pressure in the CDU system is in a downward trend according to the internal pressure data of the CDU system includes:

[0020] Compare the latest collected internal pressure data of the CDU system with the previously collected internal pressure data of the CDU system;

[0021] If the latest collected internal pressure data of the CDU system is less than the previously collected internal pressure data of the CDU system, perform cumulative counting; if the latest collected internal pressure data of the CDU system is greater than the previously collected internal pressure data of the CDU system, clear the counting number;

[0022] When the cumulative number is greater than or equal to the set number, it is determined that the pressure in the CDU system is in a downward trend.

[0023] In the above technical solution, judging whether there is an abnormal pressure mutation in the CDU system according to the internal pressure data of the CDU system includes:

[0024] Comparing the internal pressure data of the CDU system collected most recently with the internal pressure data of the CDU system collected last time;

[0025] If the internal pressure data of the CDU system collected most recently is less than the internal pressure data of the CDU system collected last time, and the difference between the two is greater than the mutation set value, it is determined that there is a pressure mutation in the CDU system.

[0026] In the above technical solution, judging whether the liquid level leakage amount of the surge tank in the CDU system reaches the set value according to the liquid level change data of the surge tank in the CDU system includes:

[0027] Setting a leakage scanning period, a leakage comparison number, and a leakage amount threshold;

[0028] Circularly recording the liquid level data of the surge tank according to the set leakage scanning period;

[0029] Within each leakage scanning period, comparing the liquid level change amount of the surge tank with the leakage amount threshold;

[0030] When the number of leakage scanning periods in which the liquid level change amount of the surge tank is greater than or equal to the leakage amount threshold continuously appears reaches the leakage comparison number, it is determined that the liquid level leakage amount of the surge tank reaches the set value.

[0031] In the above technical solution, the method for obtaining the real-time monitoring liquid leakage signal of the CDU system includes:

[0032] Arranging a positioning leakage rope at a fixed position, and collecting the current change information of the positioning leakage rope as the real-time monitoring liquid leakage signal; wherein, when the positioning leakage rope contacts the liquid and the current change reaches the set threshold, the real-time monitoring liquid leakage signal indicates that there is a liquid leakage risk in the CDU system; otherwise, the real-time monitoring liquid leakage signal indicates that there is no liquid leakage risk in the CDU system.

[0033] A leakage monitoring system for a data center CDU system provided by the present invention includes:

[0034] A data acquisition module, which acquires the real-time monitoring liquid leakage signal, the water replenishment data of the CDU system, the internal pressure data of the CDU system, and the liquid level change data of the surge tank in the CDU system through an acquisition device;

[0035] A communication module, connected to the data acquisition module for data transmission;

[0036] A control module, connected to the communication module, and monitors the liquid leakage situation of the CDU system in the data center by using the liquid leakage monitoring method described in any one of the above technical solutions.

[0037] In the above technical solution, the data acquisition module includes:

[0038] A liquid leakage sensor, connected to the positioning water leakage rope, acquires the current signal of the positioning water leakage rope and uses it as the real-time monitored liquid leakage signal;

[0039] A pressure sensor, at least two pressure sensors are respectively assembled on the main pipeline of the CDU system and the outlet pipeline of the pressure stabilizing tank, and are used to measure the internal pressure data of the CDU system;

[0040] A liquid level sensor, arranged in the pressure stabilizing tank, and is used to monitor the liquid level in the pressure stabilizing tank;

[0041] A digital quantity detection unit, used to collect the switch states of the make-up water pump, circulation pump and pressure stabilizing valve in the CDU system.

[0042] In the above technical solution, the control module includes:

[0043] A digital quantity input unit, receiving the acquisition signal of the digital quantity detection unit;

[0044] An analog quantity input unit, receiving the acquisition signal of the sensor;

[0045] A data processing unit, used to obtain the make-up water times of the CDU system according to the acquired digital quantity and analog quantity, calculate and compare the internal pressure data of the CDU system, and calculate and compare the change amount of the liquid level in the pressure stabilizing tank;

[0046] A leakage judgment unit, connected to the data processing unit, and outputs the final leakage judgment result according to the output data of the data processing unit.

[0047] In the above technical solution, it further includes:

[0048] A human-machine interaction interface, used to display the acquisition data, alarm display, leakage parameter setting, pressure trend parameter setting, make-up water times and recording time setting.

[0049] In summary, due to adopting the above technical features, the beneficial effects of the present invention are:

[0050] A leakage monitoring method and system for a CDU system in a data center provided by the present invention judges liquid leakage by comprehensively using various data, including real-time monitoring of liquid leakage signals, water replenishment data, internal pressure data, and liquid level change data of a pressure stabilizing tank, etc., avoiding the one-sidedness of single-data judgment. For example, when the real-time monitored liquid leakage signal indicates a liquid leakage risk, further comprehensive analysis is carried out by combining data such as the number of water replenishments, internal pressure conditions, and liquid level changes in the pressure stabilizing tank. Only when multiple relevant data all indicate liquid leakage is it finally determined that liquid leakage has occurred, effectively reducing the situation of misjudgment or missed judgment due to single data, and improving the accuracy and reliability of liquid leakage monitoring.

[0051] Secondly, the method based on a single liquid leakage sensor in the prior art is easily affected by factors such as sensor failures and external interferences, resulting in misjudgment or missed judgment. This method conducts cross-verification through multi-dimensional data. Even if a certain sensor fails or is abnormal, other data can be used for supplementation and correction, thereby significantly reducing the probability of misjudgment and missed judgment, ensuring that the liquid leakage problem of the CDU system can be discovered in a timely and accurate manner, and guaranteeing the equipment safety and normal operation of the data center.

[0052] In addition, this method can real-time monitor various data of the CDU system and issue early warnings in the early stage of liquid leakage through changes in multiple data indicators. For example, when the internal pressure shows an abnormal downward trend or the liquid level leakage amount in the pressure stabilizing tank gradually approaches the set value, the operation and maintenance personnel can detect potential liquid leakage risks in advance and take maintenance measures in a timely manner, such as checking pipeline connections, valve seals, the operating status of pumps, etc., to avoid the further expansion of the liquid leakage problem and reduce the damage to the data center equipment and the impact on the operation.

[0053] Finally, the CDU system will be affected by various factors during actual operation, such as fluctuations in the system operation status and changes in the external environmental temperature. These factors may cause abnormalities in single data. By comprehensively considering multiple relevant data, the present invention can better adapt to complex and changeable operating conditions, accurately distinguish normal operation fluctuations and actual liquid leakage situations, avoid misjudgment caused by changes in operating conditions, and ensure that the liquid leakage monitoring system can work stably and reliably under various conditions.

[0054] The additional aspects and advantages of the present invention will become obvious in the following description part, or be understood through the practice of the present invention. Brief Description of the Drawings

[0055] The above and / or additional aspects and advantages of the present invention will become obvious and easy to understand from the description of the embodiments in conjunction with the following drawings, where:

[0056] Figure 1 is a schematic diagram of a partial pipeline structure of a CDU system in a data center in an embodiment of the present invention;

[0057] Figure 2 is a flowchart of a leakage monitoring method for a CDU system in a data center according to an embodiment of the present invention;

[0058] Among them, Figure 1 and Figure 2 the corresponding relationship between the reference numerals and component names in the figure is as follows:

[0059] 1. Circulation pump, 2. Liquid level sensor, 3. Pressure stabilizing tank, 4. High liquid level switch, 5. Low liquid level switch, 6. Make-up water tank, 7. Make-up water pump, 8. Main pipeline pressure sensor, 9. Leakage sensor, 10. Pressure stabilizing tank pressure sensor, 11. Air charging solenoid valve, 12. Exhaust solenoid valve. Detailed implementation manners

[0060] In order to more clearly understand the above objects, features and advantages of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and specific implementation manners. It should be noted that, without conflict, the embodiments of the present application and the features in the embodiments can be combined with each other.

[0061] In the following description, many specific details are set forth in order to fully understand the present invention. However, the present invention can also be implemented in other ways different from those described herein. Therefore, the protection scope of the present invention is not limited by the specific embodiments disclosed below.

[0062] The following refers to Figure 1 and Figure 2 to describe a leakage monitoring method and system for a CDU system in a data center according to some embodiments of the present invention.

[0063] Figure 1 shows a partial pipeline structure of the CDU system, as Figure 1 shown. The CDU system mainly consists of components such as a circulation pump 1, a liquid level sensor 2, a pressure stabilizing tank 3, a high liquid level switch 4, a low liquid level switch 5, a make-up water tank 6, a make-up water pump 7, a main pipeline pressure sensor 8, a leakage sensor 9, a pressure stabilizing tank pressure sensor 10, and a pressure stabilizing valve, which are connected by pipelines; the pressure stabilizing valve includes an air charging solenoid valve 11 and an exhaust solenoid valve 12; since the circulation pump 1 and the make-up water pump 7 are usually driven by motors, in Figure 1In the illustrated embodiment, the drive motor is denoted by M. The circulation pump 1 is responsible for pushing the cooling medium to circulate in the system pipeline. The liquid level sensor 2 is used to monitor the liquid level change in the pressure stabilizing tank 3 and convert the liquid level information into an electrical signal for output, so that the system can perform liquid level control and leakage monitoring. The pressure stabilizing tank 3 plays a role in stabilizing the pressure and accommodating part of the cooling medium in the system. The change in its liquid level is of great significance for judging whether there is leakage. The makeup water tank 6 is used to store the standby cooling medium. When the system needs to be replenished with water, the makeup water pump 7 transports the cooling medium in the makeup water tank 6 into the system to maintain the normal operation and pressure balance of the system. The high liquid level switch 4 and the low liquid level switch 5 are respectively used to monitor the upper and lower limit positions of the liquid level in the makeup water tank 6. When the liquid level exceeds or is lower than the set range, the corresponding switch action will be triggered. The main pipeline pressure sensor 8 is used to monitor the pressure condition in the system in real time. The pressure data detected by it is crucial for judging whether there is a leakage risk in the system. The leakage sensor 9 is arranged at key parts of the CDU system, such as below the pipeline or around the equipment. When the cooling medium leaks and contacts the sensor, the sensor will send a signal to indicate the existence of a leakage risk. The specific positions where the leakage sensor 9 is arranged are known to those skilled in the art. And because there are many leakage sensors 9, they are usually set at different risk points and do not necessarily need to be directly connected to the pipeline. Therefore Figure 1 only a schematic representation of the leakage sensor 9 being set is shown. The pressure stabilizing tank pressure sensor 10 is installed on the outlet pipeline of the pressure stabilizing tank 3 and is used to monitor the change of the outlet pressure of the pressure stabilizing tank 3, providing an important basis for leakage judgment. The air inlet solenoid valve 11 and the exhaust solenoid valve 12 are used to control the air inlet and exhaust operations of the system to maintain the pressure balance and normal operation in the system.

[0064] The entire pipeline system forms a closed loop. The cooling medium circulates in the pipeline under the action of the circulation pump 1, passes through each component, realizes the transfer and dissipation of heat, and at the same time, the operating state of the system is monitored and controlled in real time through various sensors and control elements to ensure the normal cooling and safe operation of the data center equipment.

[0065] It should be noted that not all of the signal acquisition devices in the above components are necessary components of the traditional CDU system, but are adaptively set based on the signal acquisition requirements of the present invention. Of course, some of the information that needs to be collected in this disclosure can also use the original signal acquisition devices of the CDU system.

[0066] Based on the above CDU system, some embodiments of the present application provide a leakage monitoring method for a data center CDU system.

[0067] As Figure 2 shown, the first embodiment of the present invention proposes a leakage monitoring method for a data center CDU system, including the following steps S1 to S5.

[0068] S1. Obtain the acquisition data of the CDU system, where the acquisition data includes the real-time monitored liquid leakage signal of the CDU system, the water replenishment data of the CDU system, the internal pressure data of the CDU system, and the liquid level change data of the pressure stabilizing tank 3 in the CDU system.

[0069] In a specific embodiment, the method for obtaining the real-time monitored liquid leakage signal of the CDU system in step S1 includes:

[0070] Arrange a positioning leakage rope at a fixed point, and collect the current change information of the positioning leakage rope as the real-time monitored liquid leakage signal; wherein, when the positioning leakage rope contacts the liquid and causes the current change to reach the set threshold, the real-time monitored liquid leakage signal indicates that the CDU system has a liquid leakage risk; otherwise, the real-time monitored liquid leakage signal indicates that the CDU system has no liquid leakage risk.

[0071] It should be noted that the positioning leakage rope is a sensing device for detecting liquid leakage, and its basic working principle is based on the resistance change of a conductive material. The positioning leakage rope usually consists of a spiral frame and a group (two) of conductive cores. The spiral frame mainly plays a role in supporting and stabilizing the structure. The two conductive cores are firmly attached to both sides of the spiral frame. In the normal state, there is an insulating barrier of the spiral frame between the two conductive cores. When the leakage rope contacts water or other liquids, the liquid will form a low-resistance path between the conductive cores, resulting in a current change. The detection circuit will monitor this current change. When it reaches the set threshold, it will trigger the alarm system or close the relevant equipment to prevent further liquid leakage or damage to the equipment.

[0072] In the CDU system, the positioning leakage rope is usually arranged at key positions where liquid leakage is likely to occur, such as pipeline joints, near valves, and at the bottom of equipment, to ensure that potential liquid leakage areas are covered as much as possible. However, it is found that due to the difficulty of the positioning leakage rope to fully cover the CDU system and its own reliability issues, in actual applications, the real-time monitored liquid leakage signal can only be used as a reference for judging the liquid leakage risk.

[0073] S2. Initially judge whether the CDU system has a liquid leakage risk according to the real-time monitored liquid leakage signal. Under the requirement of high reliability, if it is initially judged that there is a liquid leakage risk, then execute steps S3 and S4. If it is initially judged that there is no liquid leakage risk, then execute step S5.

[0074] S3. When the real-time monitored liquid leakage signal indicates that the CDU system has a liquid leakage risk, judge whether the number of water replenishment times of the CDU system exceeds the set number within the preset time period according to the water replenishment data of the CDU system. If it does not exceed the set number, it is determined that the CDU system has not leaked.

[0075] S4. When the water replenishment times of the CDU system exceed the set times within a preset time period, judge whether there is an abnormal pressure situation in the CDU system according to the internal pressure data of the CDU system. The abnormal pressure situation includes that the pressure is in a downward trend and / or the pressure suddenly changes; and judge whether the liquid level leakage of the pressure stabilizing tank 3 in the CDU system reaches the set value according to the liquid level change data of the pressure stabilizing tank 3 in the CDU system; when there is an abnormal pressure situation and / or the liquid level leakage of the pressure stabilizing tank 3 reaches the set value, determine that the CDU system has a liquid leakage, otherwise determine that the CDU system has no liquid leakage.

[0076] S5. When the real-time monitored liquid leakage signal indicates that there is no liquid leakage risk in the CDU system, judge whether there is an abnormal pressure situation in the CDU system according to the internal pressure data of the CDU system. The abnormal pressure situation includes that the pressure is in a downward trend and / or the pressure suddenly changes; and judge whether the liquid level leakage of the pressure stabilizing tank 3 in the CDU system reaches the set value according to the liquid level change data of the pressure stabilizing tank 3 in the CDU system; when there is an abnormal pressure situation and the liquid level leakage of the pressure stabilizing tank 3 reaches the set value, determine that the CDU system has a liquid leakage, otherwise determine that the CDU system has no liquid leakage.

[0077] In some embodiments, in steps S4 and S5, judging whether there is an abnormal situation where the pressure in the CDU system is in a downward trend according to the internal pressure data of the CDU system includes:

[0078] Compare the internally measured pressure data of the CDU system collected most recently with the internally measured pressure data of the CDU system collected last time;

[0079] If the internally measured pressure data of the CDU system collected most recently is less than the internally measured pressure data of the CDU system collected last time, perform cumulative counting; if the internally measured pressure data of the CDU system collected most recently is greater than the internally measured pressure data of the CDU system collected last time, clear the counting times;

[0080] When the cumulative times are greater than or equal to the set times, determine that the pressure in the CDU system is in a downward trend.

[0081] In some embodiments, in steps S4 and S5, judging whether there is an abnormal situation where the pressure in the CDU system suddenly changes according to the internal pressure data of the CDU system includes:

[0082] Compare the internally measured pressure data of the CDU system collected most recently with the internally measured pressure data of the CDU system collected last time;

[0083] If the internally measured pressure data of the CDU system collected most recently is less than the internally measured pressure data of the CDU system collected last time, and the difference between the two is greater than the sudden change set value, determine that there is a sudden change in the pressure in the CDU system.

[0084] In some embodiments, in steps S4 and S5, determining whether the liquid level leakage amount of the surge tank 3 in the CDU system reaches the set value according to the liquid level change data of the surge tank 3 in the CDU system includes:

[0085] Set a leakage scan period, a leakage comparison count, and a leakage amount threshold;

[0086] Circularly record the liquid level data of the surge tank 3 according to the set leakage scan period;

[0087] Within each leakage scan period, compare the liquid level change amount of the surge tank 3 with the leakage amount threshold;

[0088] When the number of leakage scan periods in which the liquid level change amount of the surge tank 3 is continuously greater than or equal to the leakage amount threshold reaches the leakage comparison count, it is determined that the liquid level leakage amount of the surge tank 3 reaches the set value.

[0089] Based on the above steps S1 - S5, it can be known that in the method of the present invention, the system leakage is determined only in the following two cases:

[0090] The first case: When the real-time monitored liquid leakage signal indicates that there is a liquid leakage risk in the CDU system, and it is determined that the water replenishment times of the CDU system exceed the set times within the preset time period, and there is an abnormal situation in the pressure of the CDU system or the liquid level leakage amount of the surge tank 3 reaches the set value, it is determined that the CDU system has a liquid leakage.

[0091] The second case: When the real-time monitored liquid leakage signal does not indicate that there is a liquid leakage risk in the CDU system, but there is an abnormal situation in the pressure of the CDU system and the liquid level leakage amount of the surge tank 3 reaches the set value at the same time, it is determined that the CDU system has a liquid leakage.

[0092] Based on the above determination, the misjudgment and false judgment of the liquid leakage of the CDU system can be effectively avoided, and the system reliability can be improved.

[0093] Some other embodiments of the present invention provide a leakage monitoring system for a data center CDU system, including: a data acquisition module, a communication module, and a control module.

[0094] The data acquisition module acquires the real-time monitored liquid leakage signal of the CDU system, the water replenishment data of the CDU system, the internal pressure data of the CDU system, and the liquid level change data of the surge tank 3 in the CDU system through a collection device. The communication module is connected to the data acquisition module for data transmission. The control module is connected to the communication module and monitors the liquid leakage situation of the data center CDU system by using the leakage monitoring method described in any of the above embodiments.

[0095] In some embodiments, the data acquisition module includes: a liquid leakage sensor 9, a pressure sensor, a liquid level sensor 2, and a digital input unit.

[0096] The liquid leakage sensor 9 is connected to the positioning leakage rope to obtain the current signal of the positioning leakage rope and use it as the real-time monitored liquid leakage signal; at least two pressure sensors are respectively assembled on the main pipeline of the CDU system and the outlet pipeline of the pressure stabilizing tank 3 to measure the internal pressure data of the CDU system; the liquid level sensor 2 is arranged in the pressure stabilizing tank 3 to monitor the liquid level in the pressure stabilizing tank 3; the digital input unit is used to collect the switch states of the makeup water pump 7, the circulation pump 1 and the pressure stabilizing valve in the CDU system, so as to record the makeup water times and detect the liquid level leakage amount of the pressure stabilizing tank 3. For example, every time the makeup water pump 7 is turned on and off, it means that the CDU system has carried out a makeup water operation.

[0097] In some embodiments, the control module includes: a digital input unit, an analog input unit, a data processing unit and a leakage judgment unit.

[0098] The digital input unit receives the acquisition signal of the digital input unit; the analog input unit receives the acquisition signal of the sensor; the data processing unit is used to obtain the makeup water times of the CDU system based on the obtained digital and analog quantities, calculate and compare the internal pressure data of the CDU system, and calculate and compare the change amount of the liquid level of the pressure stabilizing tank 3; the leakage judgment unit is connected to the data processing unit and outputs the final leakage judgment result according to the output data of the data processing unit.

[0099] In some embodiments, the leakage monitoring system further includes a human-machine interface.

[0100] The human-machine interface is used to display the acquisition data, alarm display, leakage parameter setting, pressure trend parameter setting, makeup water times and recording time setting. For example, the set makeup water times, mutation set value, leakage scanning period, leakage comparison times and leakage amount threshold in steps S3 - S5 are manually set through the human-machine interface, so as to meet the operation and maintenance requirements of different reliability.

[0101] In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiments or examples. Moreover, the specific features, structures, materials or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.

[0102] All modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A leakage monitoring method for a CDU system in a data center, characterized in that, Including: Obtain the acquisition data of the CDU system, where the acquisition data includes the real-time monitored liquid leakage signal of the CDU system, the water replenishment data of the CDU system, the internal pressure data of the CDU system, and the liquid level change data of the pressure stabilizing tank in the CDU system; Preliminarily judge whether there is a liquid leakage risk in the CDU system according to the real-time monitored liquid leakage signal; When the real-time monitored liquid leakage signal indicates that there is a liquid leakage risk in the CDU system, judge whether the number of water replenishments of the CDU system exceeds the set number within a preset time period according to the water replenishment data of the CDU system. If it does not exceed the set number, it is determined that the CDU system has not leaked; When the number of water replenishments of the CDU system exceeds the set number within a preset time period, judge whether there is an abnormal pressure situation in the CDU system according to the internal pressure data of the CDU system. The abnormal pressure situation includes that the pressure is in a downward trend and / or the pressure suddenly changes; and judge whether the liquid level leakage amount of the pressure stabilizing tank reaches the set value according to the liquid level change data of the pressure stabilizing tank in the CDU system; when there is an abnormal pressure situation and / or the liquid level leakage amount of the pressure stabilizing tank reaches the set value, it is determined that the CDU system has leaked, otherwise it is determined that the CDU system has not leaked; When the real-time monitored liquid leakage signal indicates that there is no liquid leakage risk in the CDU system, judge whether there is an abnormal pressure situation in the CDU system according to the internal pressure data of the CDU system. The abnormal pressure situation includes that the pressure is in a downward trend and / or the pressure suddenly changes; and judge whether the liquid level leakage amount of the pressure stabilizing tank reaches the set value according to the liquid level change data of the pressure stabilizing tank in the CDU system; when there is an abnormal pressure situation and the liquid level leakage amount of the pressure stabilizing tank reaches the set value, it is determined that the CDU system has leaked, otherwise it is determined that the CDU system has not leaked.

2. The leakage monitoring method of the data center CDU system according to claim 1, characterized in that, Judging whether there is an abnormal situation where the pressure in the CDU system is in a downward trend according to the internal pressure data of the CDU system, including: Compare the internal pressure data of the CDU system collected most recently with the internal pressure data of the CDU system collected last time; If the internal pressure data of the CDU system collected most recently is less than the internal pressure data of the CDU system collected last time, perform cumulative counting; if the internal pressure data of the CDU system collected most recently is greater than the internal pressure data of the CDU system collected last time, clear the counting number; When the cumulative number is greater than or equal to the set number, it is determined that the pressure in the CDU system is in a downward trend.

3. The leakage monitoring method for the data center CDU system according to claim 1, characterized in that, Judging whether there is an abnormal situation where the pressure in the CDU system suddenly changes according to the internal pressure data of the CDU system, including: Compare the internal pressure data of the CDU system collected most recently with the internal pressure data of the CDU system collected last time; If the internal pressure data of the CDU system collected most recently is less than the internal pressure data of the CDU system collected last time, and the difference between the two is greater than the sudden change set value, it is determined that there is a sudden change in the pressure in the CDU system.

4. The leakage monitoring method of the data center CDU system according to claim 1, characterized in that, The judging whether the liquid level leakage amount of the pressure stabilizing tank reaches the set value according to the liquid level change data of the pressure stabilizing tank in the CDU system includes: Set the leakage scanning period, the number of leakage comparisons, and the leakage amount threshold; Circularly record the liquid level data of the pressure stabilizing tank according to the set leakage scanning period; During each leakage scanning cycle, compare the change in the liquid level of the pressure stabilizing tank with the leakage threshold value; When the number of leakage scanning cycles in which the change in the liquid level of the pressure stabilizing tank is continuously greater than or equal to the leakage threshold value reaches the leakage comparison count, it is determined that the leakage amount of the pressure stabilizing tank liquid level has reached the set value.

5. The leakage monitoring method of the data center CDU system according to claim 1, wherein The method for obtaining the real-time monitoring liquid leakage signal of the CDU system includes: Arrange a positioning water leakage rope at a fixed position, and collect the current change information of the positioning water leakage rope as the real-time monitoring liquid leakage signal; wherein, when the current change of the positioning water leakage rope reaches the set threshold value due to contact with the liquid, the real-time monitoring liquid leakage signal indicates that there is a liquid leakage risk in the CDU system; otherwise, the real-time monitoring liquid leakage signal indicates that there is no liquid leakage risk in the CDU system.

6. A leakage monitoring system for a CDU system in a data center, characterized in that, It includes: A data acquisition module that obtains the real-time monitoring liquid leakage signal of the CDU system, the water replenishment data of the CDU system, the internal pressure data of the CDU system, and the liquid level change data of the pressure stabilizing tank in the CDU system through a collection device; A communication module, connected to the data acquisition module, for data transmission; A control module, connected to the communication module, and monitors the liquid leakage situation of the data center CDU system by using the leakage monitoring method described in any one of claims 1 to 5.

7. The leakage monitoring system of the data center CDU system according to claim 6, characterized in that The data acquisition module includes: A liquid leakage sensor, connected to the positioning water leakage rope, and obtains the current signal of the positioning water leakage rope and uses it as the real-time monitoring liquid leakage signal; A pressure sensor, at least two pressure sensors are respectively assembled on the main pipeline of the CDU system and the outlet pipeline of the pressure stabilizing tank, for measuring the internal pressure data of the CDU system; A liquid level sensor, arranged in the pressure stabilizing tank, for monitoring the liquid level in the pressure stabilizing tank; A switch quantity detection unit, for collecting the switch states of the water replenishment pump, circulation pump, and pressure stabilizing valve in the CDU system.

8. The leakage monitoring system of the data center CDU system according to claim 7, characterized in that, The control module includes: A switch quantity input unit, which receives the acquisition signal of the switch quantity detection unit; An analog quantity input unit, which receives the acquisition signal of the sensor; A data processing unit, for obtaining the water replenishment times of the CDU system based on the obtained switch quantity and analog quantity, calculating and comparing the internal pressure data of the CDU system, and calculating and comparing the change in the liquid level of the pressure stabilizing tank; A leakage judgment unit, connected to the data processing unit, and outputs the final leakage judgment result according to the output data of the data processing unit.

9. The leakage monitoring system of the data center CDU system according to claim 7, characterized in that, It also includes: A human-machine interface, used for displaying acquisition data, alarm display, leakage parameter setting, pressure trend parameter setting, water replenishment times, and recording time setting.

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