Control method for cutting off CDU unit and CDU unit system

Abstract

The application is suitable for the technical field of liquid cooling system, and provides a CDU unit shutdown control method and a CDU unit system. The method is suitable for a CDU unit system including a working CDU and a standby CDU, and the method includes: when the working CDU to be stopped is fault-free, closing a first bypass valve, controlling a second bypass valve and a second control valve to be opened, and increasing the frequency of a second water pump; when the frequency of the second water pump reaches a first preset frequency, reducing the frequency of a first water pump; when the first water pump is closed, PID adjustment is performed on the standby CDU; when the working CDU to be stopped is faulty, closing a first control valve, the first water pump and the first bypass valve, and controlling the second bypass valve and the second control valve to be opened, and increasing the frequency of the second water pump; when the frequency of the second water pump reaches the first preset frequency, PID adjustment is performed on the standby CDU. The application can realize smooth shutdown, reduce the hydraulic or thermal fluctuation of the system during shutdown, and improve the reliability and stability of the system.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of liquid cooling systems, and particularly relates to a CDU unit shutdown control method and a CDU unit system. BACKGROUND

[0002] A data center usually configures multiple cooling distribution units (CDUs) to meet the refrigeration needs of a large number of high-power servers inside the data center, and in order to guarantee the reliability of liquid cooling, a redundant CDU is configured as a backup. The multiple CDUs and the backup CDU form a CDU unit system.

[0003] In the related art, when the working CDU (to be deactivated) and the backup CDU being used are controlled and switched, the unit parameters of the backup CDU are usually directly set to be consistent with the unit parameters of the working CDU to be deactivated, and the working CDU to be deactivated is quickly shut down. However, the above shutdown method has a great impact on the entire CDU unit system, causes a sharp fluctuation in the hydraulic or thermal force of the system, reduces the reliability and stability of the system, and further affects the heat dissipation of the data center. SUMMARY

[0004] Therefore, the embodiments of the present application provide a CDU unit shutdown control method and a CDU unit system to solve the technical problem that the related shutdown method has a great impact on the entire CDU unit system, reduces the reliability and stability of the system, and further affects the heat dissipation of the data center.

[0005] In a first aspect, the embodiments of the present application provide a CDU unit shutdown control method, which is applicable to a CDU unit system, and the CDU unit system includes a working CDU and a backup CDU. The working CDU includes a first control valve arranged on a primary side, a first water pump and a first bypass valve arranged on a secondary side, and the backup CDU includes a second control valve arranged on the primary side, a second water pump and a second bypass valve arranged on the secondary side.

[0006] The method includes the following steps.

[0007] When the working CDU to be deactivated is not faulty, the first bypass valve is closed, the second bypass valve is controlled to be opened to a first preset opening degree, the second control valve is controlled to be opened to a second preset opening degree, and the frequency of the second water pump is increased. When the frequency of the second water pump after the increase reaches a first preset frequency, the frequency of the first water pump is reduced. When the frequency of the first water pump is reduced to a second preset frequency, PID differential pressure regulation is performed on the backup CDU.

[0008] when the working CDU to be stopped fails, the first control valve, the first water pump and the first bypass valve are closed, the second bypass valve is controlled to open to a first preset opening degree, the second control valve is controlled to open to a second preset opening degree, and the frequency of the second water pump is increased; when the frequency of the second water pump after being increased reaches a first preset frequency, PID differential pressure regulation is performed on the standby CDU;

[0009] The first preset opening degree is determined according to the opening degree of the first bypass valve, the second preset opening degree is determined according to the opening degree of the first control valve, and the first preset frequency is determined according to the frequency of the first water pump. The second preset frequency is less than the first preset frequency.

[0010] In a possible implementation of the first aspect, the method further includes:

[0011] If the standby instruction is acquired, the working CDU to be stopped is determined according to the standby instruction, wherein the standby instruction carries the identifier of the CDU; or if the working CDU fails is detected, the working CDU to be stopped is determined as the working CDU that fails;

[0012] The opening degree of the first bypass valve, the opening degree of the first control valve and the frequency of the first water pump of the working CDU to be stopped are acquired, and the opening degree of the first bypass valve is taken as the first preset opening degree, the opening degree of the first control valve is taken as the second preset opening degree, and half of the frequency of the first water pump is taken as the first preset frequency.

[0013] In a possible implementation of the first aspect, the working CDU is one, and the standby CDU is one.

[0014] When the working CDU to be stopped is fault-free, the second control valve is controlled to open to a second preset opening degree, and the frequency of the second water pump is increased, including:

[0015] When the working CDU to be stopped is fault-free, the second control valve is controlled to open to a second preset opening degree at a first rate, the first control valve is controlled to close at the first rate, and the frequency of the second water pump is increased at a second rate.

[0016] In a possible implementation of the first aspect, the working CDU is multiple, and the standby CDU is one.

[0017] When the working CDU to be stopped is fault-free, the second control valve is controlled to open to a second preset opening degree, and the frequency of the second water pump is increased, including:

[0018] when the working CDU to be stopped is fault, controlling the second control valve to open to the second preset opening degree and increasing the frequency of the second water pump comprises:

[0019] In a possible implementation of the first aspect, the working CDU is one, and the standby CDU is one.

[0020] when the working CDU to be stopped is fault, controlling the second control valve to open to the second preset opening degree and increasing the frequency of the second water pump comprises:

[0021] when the working CDU to be stopped is fault, controlling the second control valve to open to the second preset opening degree and increasing the frequency of the second water pump comprises:

[0022] In a possible implementation of the first aspect, the working CDU is one, and the standby CDU is one.

[0023] when the working CDU to be stopped is fault, controlling the second control valve to open to the second preset opening degree and increasing the frequency of the second water pump comprises:

[0024] when the working CDU to be stopped is fault, controlling the second control valve to open to the second preset opening degree and increasing the frequency of the second water pump comprises:

[0025] In a possible implementation of the first aspect, the working CDU is one, and the standby CDU is one.

[0026] when the working CDU to be stopped is fault, when the frequency of the second water pump after being increased reaches the first preset frequency, the frequency of the first water pump is decreased; when the frequency of the first water pump is decreased to the second preset frequency, PID differential pressure regulation is performed on the secondary side of the standby CDU, and the PID differential pressure regulation on the primary side of the standby CDU is performed when the frequency of the second water pump has no change within a preset time period.

[0027] when the working CDU to be stopped is fault, when the frequency of the second water pump after being increased reaches the first preset frequency, the frequency of the first water pump is decreased at a second rate;

[0028] when the frequency of the first water pump is decreased to the second preset frequency, PID differential pressure regulation is performed on the secondary side of the standby CDU according to the feed-backwater differential pressure of the standby CDU, and the PID differential pressure regulation on the primary side of the standby CDU is performed when the frequency of the second water pump has no change within a preset time period.

[0029] In a possible implementation of the first aspect, the working CDU is one, and the standby CDU is one.

[0030] when the increased frequency of the second water pump reaches a first preset frequency, decreasing the frequency of the first water pump; when the frequency of the first water pump is decreased to a second preset frequency, performing PID differential pressure adjustment on the secondary side of the standby CDU according to the supply-return water pressure difference of the standby CDU, until the frequency of the second water pump has no change within a preset time period, and the opening of the second control valve is the second preset opening, performing PID differential pressure adjustment on the primary side of the standby CDU.

[0031] when the increased frequency of the second water pump reaches a first preset frequency, decreasing the frequency of the first water pump at a first rate, and controlling the first control valve to close at the first rate;

[0032] when the frequency of the first water pump is decreased to a second preset frequency, and the first control valve is closed and the opening of the second control valve is the second preset opening, performing PID differential pressure adjustment on the secondary side of the standby CDU according to the supply-return water pressure difference of the standby CDU, until the frequency of the second water pump has no change within a preset time period, and the opening of the second control valve is the second preset opening, performing PID differential pressure adjustment on the primary side of the standby CDU.

[0033] In a possible implementation of the first aspect, the working CDU is one, and the standby CDU is one.

[0034] when the increased frequency of the second water pump reaches a first preset frequency, performing PID differential pressure adjustment on the standby CDU, including:

[0035] when the increased frequency of the second water pump reaches a first preset frequency, performing PID differential pressure adjustment on the standby CDU, including:

[0036] In a possible implementation of the first aspect, the working CDU is multiple, and the standby CDU is one.

[0037] when the increased frequency of the second water pump reaches a first preset frequency, performing PID differential pressure adjustment on the standby CDU, including:

[0038] when the increased frequency of the second water pump reaches a first preset frequency, performing PID differential pressure adjustment on the standby CDU, including:

[0039] In a possible implementation of the first aspect, the working CDU further comprises a first water temperature alarm arranged at the primary side, and the standby CDU further comprises a second water temperature alarm arranged at the primary side; the working CDU is one, and the standby CDU is one;

[0040] Before the first bypass valve is closed, the method further comprises: closing the first water temperature alarm and the second water temperature alarm;

[0041] Correspondingly, when the working CDU to be deactivated is fault-free, the second water temperature alarm is reused when the first control valve is closed and the opening degree of the second control valve is the second preset opening degree;

[0042] After the first control valve, the first water pump and the first bypass valve are closed, the method further comprises: closing the first water temperature alarm and the second water temperature alarm;

[0043] Correspondingly, when the working CDU to be deactivated is fault-free, the second water temperature alarm is reused when the first control valve is closed and the opening degree of the second control valve is the second preset opening degree;

[0044] In a second aspect, the embodiments of the present application provide a CDU unit system, comprising: a working CDU, a standby CDU and a controller; the working CDU comprises a first control valve arranged at the primary side, and a first water pump and a first bypass valve arranged at the secondary side; the standby CDU comprises a second control valve arranged at the primary side, and a second water pump and a second bypass valve arranged at the secondary side;

[0045] The controller is connected with the first control valve, the first water pump, the first bypass valve, the second control valve, the second water pump and the second bypass valve respectively;

[0046] The controller is configured to, when the working CDU to be deactivated is fault-free, close the first bypass valve, control the second bypass valve to open to a first preset opening degree, control the second control valve to open to a second preset opening degree, and increase the frequency of the second water pump; when the frequency of the second water pump after the increase reaches a first preset frequency, reduce the frequency of the first water pump; when the frequency of the first water pump is reduced to a second preset frequency, perform PID differential pressure regulation on the standby CDU;

[0047] When the working CDU to be deactivated is fault-free, the first control valve, the first water pump and the first bypass valve are closed, the second bypass valve is controlled to open to a first preset opening degree, the second control valve is controlled to open to a second preset opening degree, and the frequency of the second water pump is increased; when the frequency of the second water pump after the increase reaches a first preset frequency, PID differential pressure regulation is performed on the standby CDU.

[0048] The first preset opening degree is determined according to the opening degree of the first bypass valve, the second preset opening degree is determined according to the opening degree of the first control valve, and the first preset frequency is determined according to the frequency of the first water pump; and the second preset frequency is less than the first preset frequency.

[0049] In a third aspect, an embodiment of the present application provides a controller, including a memory and a processor, the memory storing a computer program capable of running on the processor, and the processor implements the CDU unit shutdown control method according to any one of the first aspect when executing the computer program.

[0050] In a fourth aspect, an embodiment of the present application provides a computer readable storage medium, the computer readable storage medium storing a computer program, and the computer program is executed by a processor to implement the CDU unit shutdown control method according to any one of the first aspect.

[0051] In a fifth aspect, an embodiment of the present application provides a computer program product, when the computer program product is run on a controller, the controller executes the CDU unit shutdown control method according to any one of the first aspect.

[0052] It can be understood that the beneficial effects of the above-mentioned second aspect to the fifth aspect can be referred to the related description in the first aspect, and will not be repeated here.

[0053] The CDU unit shutdown control method and the CDU unit system provided by the embodiments of the present application can control the key components in the working CDU to be stopped and the standby CDU in sequence or after meeting certain shutdown conditions, and at the same time, adaptively adjust the sequence of actions of the corresponding key components for shutdown caused by faults or non-fault reasons, avoid the influence of directly starting each component of the standby CDU and directly closing each component of the working CDU to be stopped on the stability of the entire CDU unit system, and can realize smooth shutdown, reduce the hydraulic or thermal fluctuation of the system during shutdown, improve the reliability and stability of the system, and maintain the heat dissipation of the data center.

[0054] It should be understood that the general description above and the detailed description below are only exemplary and explanatory, and cannot limit the present specification. BRIEF DESCRIPTION OF DRAWINGS

[0055] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed in the embodiments or the prior art description will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0056] Figure 1 is a structural schematic diagram of a CDU unit system provided by an embodiment of the present application;

[0057] Figure 2 is a flow schematic diagram of a CDU unit tripping control method provided by an embodiment of the present application;

[0058] Figure 3 is a flow schematic diagram of a CDU unit tripping control method provided by an embodiment of the present application;

[0059] Figure 4 is a flow schematic diagram of a CDU unit tripping control method provided by an embodiment of the present application;

[0060] Figure 5 is a structural schematic diagram of a controller provided by an embodiment of the present application. DETAILED DESCRIPTION

[0061] The present application will be described in more detail below with reference to specific embodiments. The following embodiments will help those skilled in the art to further understand the role of the present application, but do not limit the present application in any form. It should be noted that for those skilled in the art, without departing from the concept of the present application, a number of modifications and improvements can be made. These all belong to the protection scope of the present application.

[0062] It should be understood that when used in the specification and claims of the present application, the term "comprising" indicates the presence of the described features, whole, steps, operations, elements and / or components, but does not exclude the presence or addition of one or more other features, whole, steps, operations, elements, components and / or sets thereof.

[0063] It should also be understood that the term "and / or" used in the specification and claims of the present application means any combination of one or more of the associated listed items and all possible combinations, and includes these combinations.

[0064] In the description of the present application and the appended claims, the terms "first", "second", "third" and the like are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0065] Reference within the specification to "one embodiment" or "some embodiments" means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment. The appearances of the phrase "in one embodiment" or "in some embodiments" in various places within specified

[0066] Furthermore, "a plurality" should be construed as meaning two or more.

[0067] A data center usually configures multiple CDUs and standby CDUs. When controlling and switching on and off the working CDU to be deactivated and the standby CDU due to failure or non-failure, the unit parameters of the standby CDU are usually directly set to be consistent with the unit parameters of the working CDU to be deactivated, and the working CDU to be deactivated is quickly turned off. However, the above machine switching method will have a great impact on the entire CDU unit system, causing a sharp fluctuation of the water force or heat force of the system, reducing the reliability and stability of the system, and further affecting the heat dissipation of the data center.

[0068] Based on the above problems, the inventors have found that, by controlling the key components in the working CDU to be deactivated and the standby CDU, such as the control valve on the primary side and the bypass valve and water pump on the secondary side, to perform corresponding actions in a certain order or after meeting certain switching conditions, and by adaptively adjusting the actions of the corresponding key components according to the switching caused by failure or non-failure, the influence of directly turning on the components of the standby CDU and directly turning off the components of the working CDU to be deactivated on the stability of the entire CDU unit system can be avoided, the smooth switching of the machine can be finally realized, the fluctuation of the water force or heat force of the system during switching can be reduced, the reliability and stability of the system can be improved, and the heat dissipation of the data center can be maintained.

[0069] Figure 1 is a structural schematic diagram of a CDU unit system provided by an embodiment of the present application. As shown in Figure 1As shown, the CDU unit system in the embodiment of the present application includes a working CDU, a standby CDU and a controller (not shown in the figure). Taking the CDU unit system including one working CDU and one standby CDU as an example, the working CDU and the standby CDU are connected in parallel, and the structures of the two are consistent, and are separated into two water paths of primary side and secondary side by a plate heat exchanger, wherein the control valve of the primary side is a key component, and the water pump and the differential pressure bypass valve (referred to as bypass valve) of the secondary side are key components. The working CDU includes a first control valve V1 arranged in the primary side, and a first water pump P1 and a first bypass valve Vp1 arranged in the secondary side, and the standby CDU includes a second control valve V2 arranged in the primary side, and a second water pump P2 and a second bypass valve Vp2 arranged in the secondary side. The CDU unit system can also include multiple working CDUs and one standby CDU, and the multiple CDUs and the standby CDU are connected in parallel.

[0070] The controller is connected with the first control valve, the first water pump, the first bypass valve, the second control valve, the second water pump and the second bypass valve respectively, and is used for controlling the actions of the above key components. The specific implementation process and principle of the controller for controlling the actions of the above key components in the embodiment can be referred to the related description of the later-described embodiment, and will not be described here.

[0071] Reference Figure 1 The working CDU and the standby CDU include other components such as temperature sensor represented by T and pressure sensor represented by D. The secondary side cooling working medium is pressurized by the water pump and then passes through the plate heat exchanger to exchange heat with the primary side low-temperature cooling working medium, the cooled secondary side cooling working medium is pumped into the load by the CDU unit system, and the cooling working medium cools the load by liquid cooling, and then the heated secondary side cooling working medium flows back to the inlet of the CDU main circulating water pump to continue the heat exchange.

[0072] The following will be described in detail Figure 1 The CDU unit control method of the present application will be described in detail.

[0073] Figure 2 is a flowchart of the CDU unit control method provided by an embodiment of the present application. As shown in Figure 2 The method in the embodiment of the present application is applicable to the CDU unit system, and can include:

[0074] In step 201, when the working CDU to be stopped is fault-free, the first bypass valve is closed, the second bypass valve is controlled to open to a first preset opening degree, the second control valve is controlled to open to a second preset opening degree, and the frequency of the second water pump is increased; when the frequency of the second water pump after the increase reaches a first preset frequency, the frequency of the first water pump is reduced; and when the frequency of the first water pump is reduced to a second preset frequency, PID differential pressure regulation is performed on the standby CDU.

[0075] The first preset opening degree is determined according to the opening degree of the first bypass valve, the second preset opening degree is determined according to the opening degree of the first control valve, and the first preset frequency is determined according to the frequency of the first water pump. The second preset frequency is less than the first preset frequency. For the convenience of understanding and description, the first control valve, the first water pump and the first bypass valve in the embodiment refer to the first control valve, the first water pump and the first bypass valve of the working CDU to be stopped.

[0076] For example, when maintenance is needed for a working CDU, a user can input a to-be-stopped instruction to realize manual machine shutdown. In order to avoid long-time working of the working CDU, the system usually sets up a round-robin machine shutdown, that is, periodically sends a to-be-stopped instruction according to a set CDU round-robin sequence and round-robin period, to realize periodic automatic machine shutdown.

[0077] In a possible implementation, the embodiment can also determine the working CDU to be stopped according to the to-be-stopped instruction when the to-be-stopped instruction is acquired, or determine the working CDU in failure as the working CDU to be stopped when the working CDU in failure is detected. Then, the opening degree of the first bypass valve, the opening degree of the first control valve and the frequency of the first water pump of the working CDU to be stopped are acquired, and the opening degree of the first bypass valve is set as the first preset opening degree, the opening degree of the first control valve is set as the second preset opening degree, and half of the frequency of the first water pump is set as the first preset frequency.

[0078] The to-be-stopped instruction carries the identifier of the CDU. The embodiment determines the working CDU to be stopped according to the CDU identifier carried by the to-be-stopped instruction, and detects the working parameters of each working CDU in real time. Whether each working CDU is in failure is determined according to the working parameters of each working CDU, and the working CDU in failure is confirmed as the working CDU to be stopped. Then, the opening degree of the first bypass valve, the opening degree of the first control valve and the frequency of the first water pump of the working CDU to be stopped before machine shutdown are recorded, such as the latest data of the working CDU to be stopped before machine shutdown. It should be noted that for automatic machine shutdown in failure, the latest normal data of the working CDU to be stopped before machine shutdown can be recorded.

[0079] In order to ensure that the performance of the CDU unit system remains unchanged after machine shutdown, the states of the key components in the standby CDU can be finally consistent with the states of the key components of the working CDU to be stopped before machine shutdown. That is, the first preset opening degree is set as the opening degree of the first bypass valve, and the second preset opening degree is set as the opening degree of the first control valve.

[0080] For example, when the working CDU to be deactivated is not faulty, the second bypass valve and the second control valve are controlled to open to the first preset opening degree and the second preset opening degree respectively, which is consistent with the state before the working CDU to be deactivated is deactivated, and the first bypass valve is closed, and the frequency of the second water pump is increased. In order to further reduce the interference caused by the shutdown of the machine to the system, the second bypass valve, the second control valve and the second water pump can be controlled to open at a certain rate.

[0081] After that, since the first water pump and the second water pump belong to different CDUs, if the first water pump and the second water pump start to act at the same time, the flow of the system will be affected, resulting in flow fluctuation. Therefore, when the frequency of the second water pump is increased to the first preset frequency, the frequency of the first water pump is reduced in the embodiment. As known from the foregoing, the first preset frequency is determined according to the frequency of the first water pump. For example, in order to make the flow fluctuation in the system smaller, the first preset frequency can be set to half of the frequency of the first water pump. The second preset frequency can be 0, that is, when the frequency of the first water pump is reduced to 0, the standby CDU is adjusted by PID to make the operation of the standby CDU more stable, for example, the second water pump is adjusted by PID according to the supply and return water pressure difference of the standby CDU until the second water pump is stable. This is because the first water pump and the second water pump belong to different CDUs. If the first water pump is not closed and the second water pump is adjusted by PID, the accuracy of the PID adjustment will be affected by the first water pump.

[0082] In step 202, when the working CDU to be deactivated is faulty, the first control valve, the first water pump and the first bypass valve are closed, the second bypass valve is controlled to open to the first preset opening degree, the second control valve is controlled to open to the second preset opening degree, and the frequency of the second water pump is increased. When the frequency of the second water pump after the increase reaches the first preset frequency, the standby CDU is adjusted by PID pressure difference.

[0083] For example, when the working CDU to be deactivated is faulty, the key components of the working CDU to be deactivated are first closed, and the second bypass valve and the second control valve are controlled to open to the first preset opening degree and the second preset opening degree respectively, which is consistent with the state before the working CDU to be deactivated is deactivated, and the frequency of the second water pump is increased. In order to further reduce the interference caused by the shutdown of the machine to the system, the second bypass valve, the second control valve and the second water pump can be controlled to open at a certain rate.

[0084] After that, when the frequency of the second water pump increases to the first preset frequency, such as half of the frequency of the first water pump, the frequency of the second water pump has met the basic demand of the system at this time. On the basis of guaranteeing the basic demand of the system, in order to make the standby CDU reach stability more quickly, the standby CDU can be adjusted by PID.

[0085] The CDU unit tripping control method provided in the embodiments of the present application controls key components in the working CDU and standby CDU to be deactivated during tripping, and performs corresponding actions in a sequential order or after certain tripping conditions are met. Furthermore, the method adaptively adjusts the order of actions of the corresponding key components for tripping caused by faults or non-faults, thereby avoiding the impact of directly opening components of the standby CDU or directly closing components of the working CDU to be deactivated on the stability of the entire CDU unit system. This method can achieve smooth tripping, reduce hydraulic or thermal fluctuations in the system during tripping, improve system reliability and stability, and maintain heat dissipation in the data center.

[0086] To further reduce the interference caused by machine tripping on the system and improve system reliability and stability, it is also possible to control the action rates of key components of the working CDU and standby CDU to be deactivated, and to perform PID adjustment on the secondary and primary sides of the standby CDU respectively.

[0087] In one possible implementation, when the working CDU to be deactivated has no faults, and there is one working CDU and one standby CDU, this embodiment controls the second control valve to open to the second preset opening and increases the frequency of the second water pump. The second control valve can be controlled to open to the second preset opening at a first rate, and the first control valve can be controlled to close at the first rate, and the frequency of the second water pump can be increased at a second rate.

[0088] For example, refer to Figure 3 In control method 2, in this embodiment, the first rate can be set based on the performance of the control valve, and the second rate can be set based on the performance of the water pump. For example, the first rate is 3% / s and the second rate is 10% / s. Since the working CDU and the standby CDU typically have the same structure and composition, i.e., the first and second control valves have the same model and performance, the first rate is used to close the first control valve and open the second control valve to ensure smooth power outage. However, if the first and second control valves have different models and performance, the control rates for the first and second control valves can be different, such as by setting corresponding control rates based on their performance.

[0089] It should be noted that in Figure 3 and Figure 4 In the figure, CDU-1 represents the working CDU, CDU-2 represents the standby CDU, V1 represents the first control valve, V2 represents the second control valve, Vp1 represents the first bypass valve, Vp2 represents the second bypass valve, P1 represents the first water pump, P2 represents the second water pump, n represents the frequency of the first water pump, and n / 2 represents half the frequency of the first water pump.

[0090] In a possible implementation, when the working CDU to be stopped is fault-free, and there is one working CDU and one standby CDU, in the process of reducing the frequency of the first water pump and controlling the standby CDU to perform PID differential pressure regulation, when the frequency of the second water pump after being increased reaches the first preset frequency, the frequency of the first water pump can be reduced at the second rate, and when the frequency of the first water pump is reduced to the second preset frequency, the secondary side of the standby CDU is controlled to perform PID differential pressure regulation according to the supply and return water pressure difference of the standby CDU, until the frequency of the second water pump is unchanged within a preset time period, and the primary side of the standby CDU is controlled to perform PID differential pressure regulation.

[0091] As known from the foregoing, the structure of the working CDU and the standby CDU is generally the same, that is, the model and performance of the first water pump and the second water pump are the same, so that the first water pump is controlled to be closed and the second water pump is controlled to be started at the second rate, to ensure that the machine trip can be smoothly performed. When the model and performance of the first water pump and the second water pump are different, the control rate of the first water pump and the second water pump can be different, for example, the corresponding control rate is set according to the performance of the first water pump and the second water pump.

[0092] For example, when the frequency of the first water pump is 0, the secondary side of the standby CDU is first controlled to perform PID differential pressure regulation according to the difference between the supply and return water pressure difference of the standby CDU and the preset pressure difference, mainly for PID differential pressure regulation of the second water pump, until the frequency of the second water pump is unchanged within a preset time period, that is, the second water pump is stable, and then the components of the primary side of the standby CDU are controlled to perform PID differential pressure regulation, to make the CDU unit system more stable.

[0093] It should be noted that after the frequency of the second water pump after being increased reaches the first preset frequency, and before the frequency of the first water pump is reduced to 0, the frequency of the second water pump is continuously increased at the second rate, until the frequency of the second water pump after being increased reaches twice the frequency of the first water pump, that is, the first preset frequency, and then the frequency of the second water pump is stopped from being increased. If the frequency of the first water pump is reduced to 0, even if the frequency of the second water pump after being increased does not reach the frequency of the first water pump, the frequency of the second water pump is no longer controlled to be increased, but the second water pump is controlled to perform PID differential pressure regulation.

[0094] Similarly, as known from the foregoing, the CDU unit system can also include multiple working CDUs and one standby CDU, and when one working CDU to be stopped appears in the multiple working CDUs, the machine trip is performed.

[0095] In a possible implementation, when the working CDU to be deactivated is fault-free and there are multiple working CDUs and one standby CDU, the embodiment can control the second control valve to open to the second preset opening degree at the first rate and increase the frequency of the second water pump at the first rate when the second control valve is controlled to open to the second preset opening degree and the frequency of the second water pump is increased.

[0096] For example, referring to the control method 4 in Figure 3 , the CDU unit system can include multiple working CDUs and one standby CDU. When only one working CDU is to be deactivated, since the other working CDUs are still working, the frequency of the second water pump can be increased at a lower first rate, such as 3% / s, to better maintain the stability of the system.

[0097] In a possible implementation, when the working CDU to be deactivated is fault-free and there are multiple working CDUs and one standby CDU, the embodiment can decrease the frequency of the first water pump, control the standby CDU to perform PID differential pressure regulation when the frequency of the second water pump after being increased reaches the first preset frequency, decrease the frequency of the first water pump at the first rate and control the first control valve to close at the first rate, perform PID differential pressure regulation on the secondary side of the standby CDU according to the supply and return water pressure difference of the standby CDU when the frequency of the first water pump is decreased to the second preset frequency, the first control valve is closed, and the opening degree of the second control valve is the second preset opening degree, and perform PID differential pressure regulation on the primary side of the standby CDU when the frequency of the second water pump has no change within a preset time period.

[0098] As known from the foregoing, when only one working CDU is to be deactivated, since the other working CDUs are still working, the frequency of the first water pump can be decreased at a lower first rate, such as 3% / s, to better maintain the stability of the system. The embodiment can decrease the influence on the system fluctuation by controlling the first control valve to close again when the frequency of the second water pump after being increased reaches the first preset frequency. Then, PID differential pressure regulation is performed on the secondary side and the primary side of the standby CDU when the frequency of the first water pump is 0, the first control valve is closed, and the opening degree of the second control valve is the second preset opening degree. The specific process and implementation principle of performing PID differential pressure regulation on the secondary side and the primary side of the standby CDU can be referred to the foregoing embodiments, which will not be described herein again.

[0099] It should be noted that, after the frequency of the second water pump after increasing reaches the first preset frequency, and the frequency of the first water pump has not been reduced to 0, or the first control valve has not been closed, or the opening degree of the second control valve has not reached the second preset opening degree, the frequency of the second water pump continues to be increased at the first rate until the frequency of the second water pump after increasing reaches the frequency of the first water pump, that is, reaches twice the first preset frequency, and then the frequency of the second water pump stops increasing. If the frequency of the first water pump is reduced to 0, and the first control valve is closed and the opening degree of the second control valve is the second preset opening degree, even if the frequency of the second water pump after increasing does not reach the frequency of the first water pump, the frequency of the second water pump is no longer controlled to increase, but the PID differential pressure regulation is performed on the second water pump.

[0100] In a possible implementation, when the working CDU to be stopped is faulty, and the working CDU is one and the standby CDU is one, in the process of controlling the second control valve to open to the second preset opening degree and increasing the frequency of the second water pump, the second control valve can be controlled to open to the second preset opening degree at a first rate, and the frequency of the second water pump can be increased at a second rate.

[0101] In some embodiments, when the working CDU to be stopped is faulty, and the working CDU is one and the standby CDU is one, when the frequency of the second water pump after increasing reaches the first preset frequency, the standby CDU is controlled to perform PID differential pressure regulation, the secondary side of the standby CDU can be controlled to perform PID differential pressure regulation according to the supply and return water pressure difference of the standby CDU until the frequency of the second water pump has no change within a preset time period, and the opening degree of the second control valve is the second preset opening degree, and then the primary side of the standby CDU is controlled to perform PID differential pressure regulation.

[0102] Referring to the control method 1 in Figure 4 , the specific implementation process and principles in the embodiment can refer to the related descriptions of the foregoing embodiments, which will not be described here.

[0103] In a possible implementation, when the working CDU to be stopped is faulty, and the working CDU is multiple and the standby CDU is one, in the process of controlling the second control valve to open to the second preset opening degree and increasing the frequency of the second water pump, the second control valve can be controlled to open to the second preset opening degree at a first rate, and the frequency of the second water pump can be increased at a first rate.

[0104] Referring to the control method 3 in Figure 4 , as known from the foregoing, when only one working CDU is to be stopped, since other working CDUs are still working, the frequency of the second water pump can be increased at a lower first rate, such as 3% / s, to better maintain the stability of the system.

[0105] In some embodiments, when the working CDU to be stopped is faulty, and there are multiple working CDUs and one standby CDU, when the frequency of the second water pump after increasing reaches the first preset frequency, the standby CDU is controlled to perform PID differential pressure regulation, and then the secondary side of the standby CDU is regulated according to the supply and return water pressure difference of the standby CDU until the frequency of the second water pump does not change within a preset time period, and then the primary side of the standby CDU is regulated according to the PID differential pressure regulation.

[0106] The specific implementation process and principles in the embodiments can refer to the related descriptions of the foregoing embodiments, which will not be described here.

[0107] In the embodiments, the rates of controlling the actions of the key components of the working CDU to be stopped and the standby CDU can further reduce the fluctuations of the system during the machine shutdown, achieve smooth machine shutdown, and perform PID regulation on the secondary side and the primary side of the standby CDU, thereby improving the reliability and stability of the system.

[0108] In a possible implementation, the working CDU in the embodiments further includes a first water temperature alarm arranged on the primary side, and the standby CDU further includes a second water temperature alarm arranged on the primary side. When there is one working CDU and one standby CDU, and the working CDU to be stopped is not faulty, the first water temperature alarm and the second water temperature alarm are further closed before the first bypass valve is closed in the embodiments, and correspondingly, the second water temperature alarm is reused when the first control valve is closed and the opening degree of the second control valve is the second preset opening degree.

[0109] For example, when there is only one working CDU and one standby CDU, the start and stop of the working CDU and the standby CDU have a greater impact on the water temperature and flow of the system, therefore, in the embodiments, when the machine is shut down, the water temperature alarms of the working CDU to be stopped and the standby CDU are first closed, then the key components are controlled, and then the second water temperature alarm is reused to monitor the cooling liquid temperature after the first control valve and the second control valve reach the target state.

[0110] When there is one working CDU and one standby CDU, and the working CDU to be stopped is faulty, the first water temperature alarm and the second water temperature alarm are further closed after the first control valve, the first water pump and the first bypass valve are closed in the embodiments, and correspondingly, the second water temperature alarm is reused when the frequency of the second water pump does not change within a preset time period and the opening degree of the second control valve is the second preset opening degree.

[0111] For example, after the key components of the working CDU to be deactivated are closed, the water temperature alarm of the working CDU to be deactivated and the standby CDU is closed, the control of the key components of the standby CDU is performed, and then the second water temperature alarm is reused to monitor the coolant temperature after the second water pump is stable and the first control valve and the second control valve reach the target state.

[0112] It should be understood that the size of the serial number of each step in the above embodiments does not mean the order of execution, and the execution order of each process should be determined according to its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of the present application.

[0113] Figure 5 FIG. 1 is a structural schematic diagram of a controller according to an embodiment of the present application. As shown in FIG. 1, the controller 500 according to the embodiment of the present application includes a processor 510 and a memory 520, and the memory 520 stores a computer program 521 executable on the processor 510. Figure 5 When the processor 510 executes the computer program 521, the steps in any of the above method embodiments are implemented, for example, the steps 201 to 202 shown in FIG. 2. Figure 2

[0114] For example, the computer program 521 can be divided into one or more modules / units, and the one or more modules / units are stored in the memory 520 and executed by the processor 510 to complete the present application. The one or more modules / units can be a series of computer program instruction segments capable of completing a specific function, which are used to describe the execution process of the computer program 521 in the controller 500.

[0115] Those skilled in the art can understand that Figure 5 The controller is only an example and does not constitute a limitation on the controller, and can include more or fewer components than those shown, or combine certain components, or different components, such as input / output devices, network access devices, buses, etc.

[0116] The processor 510 can be a central processing unit (CPU), and can also be other general-purpose processors, digital signal processors (DSP), application specific integrated circuits (ASIC), field-programmable gate arrays (FPGA) or other programmable logic devices, discrete gates or transistor logic devices, discrete hardware components, etc. The general-purpose processor can be a microprocessor or the processor can also be any conventional processor.​

[0117] The memory 520 can be an internal storage unit of the controller, such as a hard disk or a memory of the controller, or an external storage device of the controller, such as a plug-in hard disk, a smart media card (SMC), a secure digital (SD) card, a flash card, and the like. The memory 520 can include both the internal storage unit and the external storage device of the controller. The memory 520 is used to store a computer program and other programs and data required by the controller. The memory 520 can also be used to temporarily store data that has been output or will be output.

[0118] It can be clearly understood by those skilled in the art that, for the convenience and brevity of description, only the division of the above functional units and modules is taken as an example for illustration, and in actual application, the above functions can be completed by different functional units and modules according to needs, that is, the internal structure of the apparatus is divided into different functional units or modules to complete all or part of the functions described above. Each functional unit and module in the embodiment can be integrated in one processing unit, or each unit can exist physically, or two or more units can be integrated in one unit, and the integrated unit can be realized in the form of hardware or in the form of software functional unit. In addition, the specific names of the functional units and modules are only for the convenience of mutual distinction, and do not limit the protection scope of the present application. The specific working process of the units and modules in the system can refer to the corresponding process in the foregoing method embodiments, which will not be described here.

[0119] In the above embodiments, the description of each embodiment has its own emphasis, and the parts not described or recorded in detail in a certain embodiment can be referred to the relevant description of other embodiments.

[0120] Those skilled in the art can realize that the units and algorithm steps of each example described in combination with the embodiments disclosed herein can be realized by electronic hardware or a combination of computer software and electronic hardware. Whether the functions are executed in hardware or software depends on the specific application and design constraints of the technical solution. Professional technicians can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of the present application.

[0121] In the embodiments of the present application, it should be understood that the disclosed apparatuses / controllers and methods can be implemented in other manners. For example, the embodiments of the apparatuses / controllers described above are merely schematic. For example, the division of the modules or units is only a logical function division. There can be another division manner for the actual implementation, for example, multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. In addition, the displayed or discussed mutual couplings or direct couplings or communication connections between the units can be indirect couplings or communication connections through some interfaces, devices or units, and can be electrical, mechanical or in other forms.

[0122] The units described as separate components can or can not be physically separate, and the components shown as units can or can not be physical units, i.e., can be located in one place, or can be distributed on multiple network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the embodiments.

[0123] In addition, each functional unit in the various embodiments of the present application can be integrated into a processing unit, or each unit can exist physically, or two or more units can be integrated into one unit. The integrated unit can be implemented in the form of hardware, or in the form of a software functional unit.

[0124] The integrated module / unit, if implemented in the form of a software functional unit and sold or used as an independent product, can be stored in a computer readable storage medium. Based on this understanding, all or part of the flow of the above-mentioned embodiment methods can be completed by a computer program instructing related hardware, and the computer program can be stored in a computer readable storage medium. When the processor executes the computer program, the steps of each method embodiment described above can be implemented. The computer program includes computer program code, which can be in the form of source code, object code, executable file or some intermediate form. The computer readable medium can include any entity or device capable of carrying the computer program code, recording medium, U disk, mobile hard disk, magnetic disk, optical disk, computer memory, read-only memory (ROM), random access memory (RAM), electrical carrier signal, telecommunication signal and software distribution medium, etc.

[0125] The above-described embodiments are only used to illustrate the technical solutions of the present application, and are not intended to limit the present application; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: it can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement for part of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application, and should be included in the protection scope of the present application.

Claims

1. A CDU unit tripping control method, characterized in that, The CDU unit system is suitable for a CDU unit system comprising a working CDU and a standby CDU; wherein the working CDU comprises a first control valve arranged at a primary side, and a first water pump and a first bypass valve arranged at a secondary side; and the standby CDU comprises a second control valve arranged at the primary side, and a second water pump and a second bypass valve arranged at the secondary side; The method comprises: when the working CDU to be stopped is fault-free, closing the first bypass valve, controlling the second bypass valve to open to a first preset opening degree, controlling the second control valve to open to a second preset opening degree, and increasing the frequency of the second water pump; when the frequency of the second water pump after being increased reaches a first preset frequency, reducing the frequency of the first water pump; and when the frequency of the first water pump is reduced to a second preset frequency, performing PID differential pressure regulation on the standby CDU; when the working CDU to be stopped is fault-free, closing the first control valve, the first water pump and the first bypass valve, controlling the second bypass valve to open to a first preset opening degree, controlling the second control valve to open to a second preset opening degree, and increasing the frequency of the second water pump; when the frequency of the second water pump after being increased reaches a first preset frequency, performing PID differential pressure regulation on the standby CDU; wherein the first preset opening degree is determined according to the opening degree of the first bypass valve, the second preset opening degree is determined according to the opening degree of the first control valve, and the first preset frequency is determined according to the frequency of the first water pump; and the second preset frequency is less than the first preset frequency.

2. The CDU unit trip control method of claim 1, wherein, The method further comprises: if a to-be-stopped instruction is acquired, determining the working CDU to be stopped according to the to-be-stopped instruction, wherein the to-be-stopped instruction carries the identifier of the CDU; or if a working CDU fault is detected, determining the working CDU in fault as the working CDU to be stopped; acquiring the opening degree of the first bypass valve, the opening degree of the first control valve and the frequency of the first water pump of the working CDU to be stopped, and taking the opening degree of the first bypass valve as the first preset opening degree, the opening degree of the first control valve as the second preset opening degree, and half of the frequency of the first water pump as the first preset frequency.

3. The CDU unit trip control method of claim 1 or 2, wherein, The working CDU is one, and the standby CDU is one; when the working CDU to be stopped is fault-free, controlling the second control valve to open to a second preset opening degree and increasing the frequency of the second water pump, comprises: when the working CDU to be stopped is fault-free, controlling the second control valve to open to a second preset opening degree at a first rate, controlling the first control valve to close at a first rate, and increasing the frequency of the second water pump at a second rate.

4. The CDU unit trip control method of claim 1 or 2, wherein, The working CDU is one, and the standby CDU is one; when the working CDU to be stopped is fault-free, controlling the second control valve to open to a second preset opening degree and increasing the frequency of the second water pump, comprises: when the working CDU to be stopped is fault-free, controlling the second control valve to open to a second preset opening degree at a first rate, and increasing the frequency of the second water pump at a first rate.

5. The CDU unit trip control method of claim 1 or 2, wherein, The working CDU is one, and the standby CDU is one; When the working CDU to be stopped fails, the second control valve is controlled to open to a second preset opening degree, and the frequency of the second water pump is increased, comprising: When the working CDU to be stopped fails, the second control valve is controlled to open to a second preset opening degree at a first rate, and the frequency of the second water pump is increased at a second rate; When the working CDU to be stopped fails, when the increased frequency of the second water pump reaches a first preset frequency, PID differential pressure regulation is performed on the standby CDU, comprising: When the working CDU to be stopped fails, when the increased frequency of the second water pump reaches a first preset frequency, PID differential pressure regulation is performed on the secondary side of the standby CDU according to the supply and return water pressure difference of the standby CDU, until the frequency of the second water pump does not change within a preset time period, and the opening degree of the second control valve is a second preset opening degree, PID differential pressure regulation is performed on the primary side of the standby CDU.

6. The CDU unit trip control method of claim 1 or 2, wherein, The working CDU is one, and the standby CDU is one; When the working CDU to be stopped fails, the second control valve is controlled to open to a second preset opening degree, and the frequency of the second water pump is increased, comprising: When the working CDU to be stopped fails, the second control valve is controlled to open to a second preset opening degree at a first rate, and the frequency of the second water pump is increased at a first rate; When the working CDU to be stopped fails, when the increased frequency of the second water pump reaches a first preset frequency, PID differential pressure regulation is performed on the standby CDU, comprising: When the working CDU to be stopped fails, when the increased frequency of the second water pump reaches a first preset frequency, PID differential pressure regulation is performed on the secondary side of the standby CDU according to the supply and return water pressure difference of the standby CDU, until the frequency of the second water pump does not change within a preset time period, and the opening degree of the second control valve is a second preset opening degree, PID differential pressure regulation is performed on the primary side of the standby CDU.

7. The CDU unit trip control method of claim 1 or 2, wherein, The working CDU is one, and the standby CDU is one; When the working CDU to be stopped fails, when the increased frequency of the second water pump reaches a first preset frequency, PID differential pressure regulation is performed on the standby CDU, comprising: When the working CDU to be stopped fails, when the increased frequency of the second water pump reaches a first preset frequency, PID differential pressure regulation is performed on the secondary side of the standby CDU according to the supply and return water pressure difference of the standby CDU, until the frequency of the second water pump does not change within a preset time period, and the opening degree of the second control valve is a second preset opening degree, PID differential pressure regulation is performed on the primary side of the standby CDU. The working CDU is one, and the standby CDU is one; 8. The CDU unit trip control method of claim 1 or 2, wherein, When the working CDU to be stopped fails, when the increased frequency of the second water pump reaches a first preset frequency, PID differential pressure regulation is performed on the standby CDU, comprising: When the working CDU to be stopped fails, when the increased frequency of the second water pump reaches a first preset frequency, PID differential pressure regulation is performed on the secondary side of the standby CDU according to the supply and return water pressure difference of the standby CDU, until the frequency of the second water pump does not change within a preset time period, and the opening degree of the second control valve is a second preset opening degree, PID differential pressure regulation is performed on the primary side of the standby CDU. The working CDU is one, and the standby CDU is one; When the working CDU to be stopped fails, when the increased frequency of the second water pump reaches a first preset frequency, PID differential pressure regulation is performed on the standby CDU, comprising: When the working CDU to be stopped fails, when the increased frequency of the second water pump reaches a first preset frequency, PID differential pressure regulation is performed on the secondary side of the standby CDU according to the supply and return water pressure difference of the standby CDU, until the frequency of the second water pump does not change within a preset time period, and the opening degree of the second control valve is a second preset opening degree, PID differential pressure regulation is performed on the primary side of the standby CDU. When the frequency of the second water pump after being increased reaches the first preset frequency, the frequency of the first water pump is reduced at a first rate, and the first control valve is controlled to be closed at the first rate. When the frequency of the first water pump is reduced to the second preset frequency, and the first control valve is closed and the opening degree of the second control valve is the second preset opening degree, PID differential pressure adjustment is performed on the secondary side of the standby CDU according to the supply and return water pressure difference of the standby CDU, and when the frequency of the second water pump has no change within a preset time period, PID differential pressure adjustment is performed on the primary side of the standby CDU. The working CDU further comprises a first water temperature alarm arranged on the primary side, and the standby CDU further comprises a second water temperature alarm arranged on the primary side; the working CDU is one, and the standby CDU is one; 9. The CDU unit trip control method of claim 1 or 2, wherein, Before the first bypass valve is closed, the first water temperature alarm and the second water temperature alarm are also closed. Correspondingly, when the first control valve is closed and the opening degree of the second control valve is the second preset opening degree, the second water temperature alarm is reused when the working CDU to be stopped is fault-free. After the first control valve, the first water pump and the first bypass valve are closed, the first water temperature alarm and the second water temperature alarm are also closed. Correspondingly, when the frequency of the second water pump has no change within a preset time period and the opening degree of the second control valve is the second preset opening degree, the second water temperature alarm is reused when the working CDU to be stopped is fault-free. Comprising:

10. A CDU train system, characterized in that, The working CDU, the standby CDU and the controller; the working CDU comprises a first control valve arranged on the primary side, and a first water pump and a first bypass valve arranged on the secondary side, and the standby CDU comprises a second control valve arranged on the primary side, and a second water pump and a second bypass valve arranged on the secondary side; The controller is connected with the first control valve, the first water pump, the first bypass valve, the second control valve, the second water pump and the second bypass valve respectively; When the working CDU to be stopped is fault-free, the first bypass valve is closed, the second bypass valve is controlled to be opened to a first preset opening degree, the second control valve is controlled to be opened to a second preset opening degree, and the frequency of the second water pump is increased; when the frequency of the second water pump after being increased reaches the first preset frequency, the frequency of the first water pump is reduced; when the frequency of the first water pump is reduced to the second preset frequency, PID differential pressure adjustment is performed on the standby CDU. ​ When the working CDU to be deactivated fails, the first control valve, the first water pump and the first bypass valve are closed, the second bypass valve is controlled to open to a first preset opening, the second control valve is controlled to open to a second preset opening, and the frequency of the second water pump is increased; when the frequency of the second water pump after being increased reaches a first preset frequency, PID differential pressure regulation is performed on the standby CDU. The first preset opening is determined according to the opening of the first bypass valve, the second preset opening is determined according to the opening of the first control valve, and the first preset frequency is determined according to the frequency of the first water pump; the second preset frequency is less than the first preset frequency.

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