Liquid cooling system, liquid cooling method and module

Abstract

The present application relates to a liquid cooling system, a liquid cooling method, and a module, including: determining a speed control strategy and a flow rate adjustment strategy that match the number of loads connected to a target pump of the liquid cooling system by using a gradient control table, where the gradient control table is used to record the gradient speed control strategy and the flow rate adjustment strategy; controlling the speed of the target pump according to the speed control strategy; and adjusting the flow rate of the flow control valve of the liquid cooling system according to the flow rate adjustment strategy when the speed of the target pump reaches a preset condition. By using the gradient control table to determine the speed control strategy and the flow rate adjustment strategy that match the number of loads, and adjusting the speed of the target pump and the flow rate flowing through the load according to the above strategies, the problem that operating at a fixed speed or controlling the speed of the pump according to a certain outlet pressure value of the pump will increase the system energy consumption is solved.

Description

Technical Field

[0001] This application relates to the technical field of equipment heat dissipation and cooling, and particularly to a liquid cooling system, a liquid cooling method, and a module. Background Art

[0002] In a large liquid cooling system, users will use multiple cooling terminals with different temperature requirements, such as for low-temperature cargo storage and electronic equipment cooling. Cooling terminals with different temperature requirements have different requirements for liquid cooling temperature and flow rate. The start and stop of cooling terminals with different cooling capacities result in large changes in the flow rate requirements of the liquid cooling system. In a conventional liquid cooling system, the pump generally operates at a fixed speed or the pump speed is controlled according to a certain outlet pressure value of the pump, which will increase the system energy consumption and poor economy.

[0003] In view of the above problems, no effective solution has been proposed yet. Summary of the Invention

[0004] This application provides a liquid cooling system, a liquid cooling method, and a module to solve the technical problem that controlling the pump speed at a fixed speed or according to a certain outlet pressure value of the pump will increase the system energy consumption.

[0005] According to one aspect of the embodiments of this application, a liquid cooling method is provided, including: determining a speed control strategy and a flow rate adjustment strategy that match the number of loads connected to the target pump of the liquid cooling system by using a gradient control table, where the gradient control table is used to record the gradient speed control strategy and the flow rate adjustment strategy; controlling the speed of the target pump according to the speed control strategy; and adjusting the flow rate of the flow control valve of the liquid cooling system according to the flow rate adjustment strategy when the speed of the target pump reaches a preset condition.

[0006] According to another aspect of the embodiments of this application, a liquid cooling module is provided, including: a strategy determination unit for determining a speed control strategy and a flow rate adjustment strategy that match the number of loads connected to the target pump of the liquid cooling system by using a gradient control table, where the gradient control table is used to record the gradient speed control strategy and the flow rate adjustment strategy; a speed control unit for controlling the speed of the target pump according to the speed control strategy; and a flow rate adjustment unit for adjusting the flow rate of the flow control valve of the liquid cooling system according to the flow rate adjustment strategy when the speed of the target pump reaches a preset condition.

[0007] According to another aspect of the embodiments of the present application, the present application provides a liquid cooling system, including: a speed control module, configured to determine a speed control strategy matching the number of loads connected to the target pump of the liquid cooling system by using a gradient control table, and control the speed of the target pump according to the speed control strategy, wherein the gradient control table is used to record the gradient speed control strategy and the flow rate adjustment strategy; a flow rate adjustment module, connected to the speed control module, configured to, after the speed control module controls the speed of the target pump according to the speed control strategy, adjust the flow rate of the flow rate adjustment valve of the liquid cooling system by using the flow rate adjustment strategy corresponding to the speed control strategy.

[0008] Optionally, the speed control module is further configured to, when the number of loads connected to the target pump is the first number, reduce the speed of the target pump at a first rate so that the outlet pressure value of the target pump is reduced to a first preset pressure value, where the first number is the number within the first gradient range in the gradient control table.

[0009] Optionally, the flow rate adjustment module is further configured to reduce the flow rate and decrease the opening degree, specifically: when the outlet pressure value is reduced to the first preset pressure value, continuously reduce the flow rate at a second rate within a first time period, and keep the opening degree of the flow rate adjustment valve at a first opening degree within a second time period after the first time period, where the first opening degree is the opening degree of the flow rate adjustment valve at the end of the first time period; the flow rate adjustment module is further configured to iteratively execute the steps of reducing the flow rate and decreasing the opening degree until the flow rate adjustment valve is closed.

[0010] Optionally, the speed control module is further configured to, when the number of loads connected to the target pump is the second number, reduce the speed of the target pump at a third rate so that the outlet pressure value of the target pump is reduced to a second preset pressure value, where the second number is the number within the second gradient range in the gradient control table.

[0011] Optionally, the flow rate adjustment module is further configured to reduce the flow rate and decrease the opening degree, specifically: when the outlet pressure value is reduced to the second preset pressure value, continuously reduce the flow rate at a fourth rate within a third time period, and keep the opening degree of the flow rate adjustment valve at a second opening degree within a fourth time period after the third time period, where the second opening degree is the opening degree of the flow rate adjustment valve at the end of the third time period; the flow rate adjustment module is further configured to iteratively execute the steps of reducing the flow rate and decreasing the opening degree until the flow rate adjustment valve is closed.

[0012] Optionally, the rotational speed control module is further configured to, when the number of loads connected to the target pump is the third number, if the outlet pressure value of the target pump is greater than or equal to the pressure threshold, reduce the rotational speed of the target pump at the fifth rate so that the outlet pressure value is reduced to the third preset pressure value; if the outlet pressure value is less than the pressure threshold, reduce the rotational speed of the target pump at the fifth rate so that the outlet pressure value is reduced to the fourth preset pressure value, where the third number is the number in the third gradient range in the gradient control table.

[0013] Optionally, the flow rate adjustment module is further configured to execute reducing the flow rate and decreasing the opening degree, specifically: when the outlet pressure value is reduced to the third preset pressure value or the fourth preset pressure value, continuously reduce the flow rate at the sixth rate within the fifth time period, and keep the opening degree of the flow rate regulating valve at the third opening degree within the sixth time period after the fifth time period, where the third opening degree is the opening degree of the flow rate regulating valve at the end of the fifth time period; the flow rate adjustment module is further configured to iteratively execute the steps of reducing the flow rate and decreasing the opening degree until the flow rate regulating valve is closed.

[0014] Optionally, the flow rate adjustment module is further configured to, when the opening degree of the flow rate regulating valve reaches the opening degree threshold, control the opening degree of the flow rate regulating valve to be fixed at the opening degree threshold until the flow rate regulating valve is closed.

[0015] Optionally, the rotational speed control module includes: a target pump for providing power to the liquid cooling system by conveying fluid; a pressure sensor connected to the target pump for detecting the outlet pressure value of the target pump; and a heat exchanger connected to the target pump for cooling the fluid output by the target pump.

[0016] Optionally, the flow rate adjustment module includes: a plurality of flow rate adjustment units for adjusting the flow rate flowing through the load, where the respective adjustment units are connected in parallel.

[0017] Optionally, the flow rate adjustment unit includes a flow rate regulating valve and a load, the flow rate regulating valve is connected to the load, and the flow rate regulating valve is configured to adjust the flow rate flowing through the load according to the flow rate adjustment strategy.

[0018] The above technical solutions provided by the embodiments of the present application have the following advantages compared with the related technologies:

[0019] This application provides a liquid cooling method, which includes: using a gradient control table to determine a speed control strategy and a flow rate adjustment strategy that match the number of loads connected to the target pump of the liquid cooling system, where the gradient control table is used to record the gradient speed control strategy and the flow rate adjustment strategy; controlling the speed of the target pump according to the speed control strategy; and adjusting the flow rate of the flow control valve of the liquid cooling system according to the flow rate adjustment strategy when the speed of the target pump reaches a preset condition. By using the gradient control table to determine the speed control strategy and the flow rate adjustment strategy that match the number of loads, and adjusting the speed of the target pump and the flow rate through the load according to the above strategies, the problem that operating at a fixed speed or controlling the speed of the pump according to a certain outlet pressure value of the pump will increase the system energy consumption is solved. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The accompanying drawings herein are incorporated into and constitute a part of this specification, showing embodiments consistent with the present application and, together with the specification, are used to explain the principles of the present application.

[0021] To more clearly illustrate the technical solutions in the embodiments of the present application or in the related art, the following will briefly introduce the drawings required for use in the description of the embodiments or the related art. Obviously, for those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0022] Figure 1 FIG. is a flowchart of an optional liquid cooling method provided according to an embodiment of the present application;

[0023] Figure 2 FIG. is a block diagram of an optional liquid cooling module provided according to an embodiment of the present application;

[0024] Figure 3 FIG. is a schematic diagram of an optional liquid cooling system provided according to an embodiment of the present application;

[0025] Figure 4 FIG. is an optional speed and flow rate change diagram provided according to an embodiment of the present application;

[0026] Figure 5 FIG. is another optional speed and flow rate change diagram provided according to an embodiment of the present application;

[0027] Figure 6 FIG. is another optional speed and flow rate change diagram provided according to an embodiment of the present application;

[0028] Figure 7 FIG. is a schematic diagram of another optional liquid cooling system provided according to an embodiment of the present application. DETAILED DESCRIPTION

[0029] To make the objectives, technical solutions, and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. Apparently, the described embodiments are some, but not all, of the embodiments of the present application. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present application without creative efforts shall fall within the scope of protection of the present application.

[0030] In subsequent descriptions, suffixes such as "module", "component", or "unit" used to represent elements are only for the convenience of describing the present application, and they have no specific meaning in themselves. Therefore, "module" and "component" can be used interchangeably.

[0031] In a large-scale liquid cooling system, users will use multiple cooling terminals with different temperature requirements, such as for storing low-temperature goods and cooling electronic devices. Cooling terminals with different temperature requirements have different requirements for liquid cooling temperature and flow rate. The start and stop of cooling terminals with different cooling capacities cause large changes in the flow rate requirements of the liquid cooling system. In addition, in a large-scale liquid cooling system, the installation positions of each cooling terminal are different. Especially for the terminals with low-temperature requirements (where the liquid viscosity is high at low temperatures), the farther away from the pump, the greater the pressure drop change in the liquid cooling circuit. In a conventional liquid cooling system, it generally operates at a fixed speed or controls the pump speed according to a certain outlet pressure value of the pump, which will increase the system energy consumption and is poor in economy.

[0032] In addition, in a large-scale liquid cooling system, when the load (terminal load) suddenly decreases, a water hammer phenomenon will occur in the liquid cooling system circuit (this phenomenon is related to the flow rate of the fluid and the pipeline material), which may damage the components on the pipeline.

[0033] To solve the problems mentioned in the background art, according to one aspect of the embodiments of the present application, a liquid cooling method is provided, as Figure 1 shown, including:

[0034] Step 101, using a gradient control table to determine a speed control strategy and a flow rate adjustment strategy that match the number of loads connected to the target pump of the liquid cooling system, where the gradient control table is used to record the gradient speed control strategy and the flow rate adjustment strategy;

[0035] Step 103, controlling the speed of the target pump according to the speed control strategy;

[0036] Step 105, when the speed of the target pump reaches a preset condition, adjusting the flow rate of the flow rate regulating valve of the liquid cooling system according to the flow rate adjustment strategy.

[0037] This application is applied to the technical field of equipment heat dissipation and cooling. Through the pump circuit of the liquid cooling system formed by including a speed control module and a flow regulation module, a gradient control target value of the pump is established according to the change of the end load, and combined with the control of the user end flow regulating valve, the economy and reliability of the liquid cooling system are improved.

[0038] The gradient control table is obtained by developers through experiments in advance. In the gradient range of the load setting opening in the gradient control table, there are corresponding speed control strategies and flow regulation strategies. The speed control strategy is used to indicate that by controlling the speed of the target pump, the outlet pressure value of the target pump can reach the corresponding target value, and the flow regulation strategy is used to indicate that the flow regulating valve adjusts the flow by controlling the opening.

[0039] Optionally, when the number of loads connected to the target pump is the first number, the speed of the target pump is reduced at the first rate so that the outlet pressure value of the target pump is reduced to the first preset pressure value, where the first number is the number in the first gradient range in the gradient control table.

[0040] Optionally, when the outlet pressure value is reduced to the first preset pressure value, the flow is continuously reduced at the second rate within the first time period, and the opening of the flow regulating valve is continuously maintained at the first opening within the second time period after the first time period, where the first opening is the opening of the flow regulating valve at the end of the first time period; the steps of reducing the flow and reducing the opening are iteratively executed until the flow regulating valve is closed.

[0041] Optionally, when the number of loads connected to the target pump is the second number, the speed of the target pump is reduced at the third rate so that the outlet pressure value of the target pump is reduced to the second preset pressure value, where the second number is the number in the second gradient range in the gradient control table.

[0042] Optionally, when the outlet pressure value is reduced to the second preset pressure value, the flow is continuously reduced at the fourth rate within the third time period, and the opening of the flow regulating valve is continuously maintained at the second opening within the fourth time period after the third time period, where the second opening is the opening of the flow regulating valve at the end of the third time period; the steps of reducing the flow and reducing the opening are iteratively executed until the flow regulating valve is closed.

[0043] Optionally, when the number of loads connected to the target pump is the third number, if the outlet pressure value of the target pump is greater than or equal to the pressure threshold, the speed of the target pump is reduced at the fifth rate so that the outlet pressure value is reduced to the third preset pressure value; if the outlet pressure value is less than the pressure threshold, the speed of the target pump is reduced at the fifth rate so that the outlet pressure value is reduced to the fourth preset pressure value, where the third number is the number in the third gradient range in the gradient control table.

[0044] Optionally, when the outlet pressure value decreases to the third preset pressure value or the fourth preset pressure value, the flow rate is continuously reduced at a sixth rate within a fifth time period, and the opening degree of the flow rate regulating valve is continuously maintained at a third opening degree within a sixth time period after the fifth time period, where the third opening degree is the opening degree of the flow rate regulating valve at the end of the fifth time period; the steps of reducing the flow rate and decreasing the opening degree are iteratively executed until the flow rate regulating valve is closed.

[0045] Optionally, when the opening degree of the flow rate regulating valve reaches the opening degree threshold, control the opening degree of the flow rate regulating valve to be fixed at the opening degree threshold until the flow rate regulating valve is closed.

[0046] Specifically, when the subsequent liquid cooling system is described, the above steps will be further described.

[0047] According to one aspect of the embodiments of the present application, a liquid cooling module is provided, as Figure 2 shown, including:

[0048] A strategy determination unit 202, configured to use a gradient control table to determine a speed control strategy and a flow rate adjustment strategy that match the number of loads connected to the target pump of the liquid cooling system, where the gradient control table is used to record the gradient speed control strategy and the flow rate adjustment strategy;

[0049] A speed control unit 204, configured to control the speed of the target pump according to the speed control strategy;

[0050] A flow rate adjustment unit 206, configured to adjust the flow rate of the flow rate regulating valve of the liquid cooling system according to the flow rate adjustment strategy when the speed of the target pump reaches a preset condition.

[0051] It should be noted that the strategy determination unit 202 in this embodiment can be used to execute step 101 in the embodiments of the present application, the speed control unit 204 in this embodiment can be used to execute step 103 in the embodiments of the present application, and the flow rate adjustment unit 206 in this embodiment can be used to execute step 105 in the embodiments of the present application.

[0052] Here, it should be noted that the examples and application scenarios implemented by the above units and the corresponding steps are the same, but are not limited to the content disclosed in the above embodiments.

[0053] According to another aspect of the embodiments of the present application, a liquid cooling system is provided, as Figure 3 shown, including:

[0054] A speed control module 302, configured to use a gradient control table to determine a speed control strategy that matches the number of loads connected to the target pump of the liquid cooling system, and control the speed of the target pump according to the speed control strategy, where the gradient control table is used to record the gradient speed control strategy and the flow rate adjustment strategy;

[0055] The flow rate adjustment module 304, connected to the rotational speed control module, is configured to adjust the flow rate of the flow rate regulating valve of the liquid cooling system by using a flow rate adjustment strategy corresponding to the rotational speed control strategy after the rotational speed control module controls the rotational speed of the target pump according to the rotational speed control strategy.

[0056] The liquid cooling system provided in this application can not only effectively improve the working economy of the pump, but also effectively eliminate the water hammer phenomenon. Next, the functions and effects of the rotational speed control module and the flow rate adjustment module will be specifically described.

[0057] As an optional embodiment, the rotational speed control module is further configured to reduce the rotational speed of the target pump at a first rate when the number of loads connected to the target pump is the first number, so that the outlet pressure value of the target pump is reduced to a first preset pressure value, where the first number is the number within the first gradient range in the gradient control table.

[0058] Specifically, the number of loads in this application refers to the number of opened end loads. The gradient control table divides the number of loads into gradient ranges based on the proportion of the number of loads to the total loads (including all opened and closed loads). For example, the first gradient range is (75%, 100%], indicating that the number of loads in the first gradient range is greater than 75% of the total loads and less than or equal to the total number of loads.

[0059] Figure 4 This is a rotational speed and flow rate change diagram provided in this application, mainly applicable to the case where the number of opened loads is the first number.

[0060] Exemplarily, when some end loads are closed, the total load of the liquid cooling system decreases slightly, and the control outlet pressure value is reduced to A1. When the change (decrease) in the outlet pressure value is lower than d% (for example, 20%), the change in the rotational speed of the pump refers to Figure 4 the change of curve B1 therein, and the rotational speed of the pump is reduced at a rate v1 to reduce the outlet pressure value to the first preset pressure value A1.

[0061] As an optional embodiment, the flow rate adjustment module is further configured to reduce the flow rate and decrease the opening degree, specifically: when the outlet pressure value is reduced to the first preset pressure value, continuously reduce the flow rate at a second rate within a first time period, and keep the opening degree of the flow rate regulating valve at a first opening degree within a second time period after the first time period, where the first opening degree is the opening degree of the flow rate regulating valve at the end moment of the first time period; the flow rate adjustment module is further configured to iteratively execute the steps of reducing the flow rate and decreasing the opening degree until the flow rate regulating valve is closed.

[0062] Exemplarily, for adjusting the flow rate regulating valve of the end load, refer to Figure 4During the change of the C1 curve, the flow rate through the load is reduced at a rate of v2, and the opening of the flow regulating valve is adjusted. After t1 (e.g., 10 seconds), the opening of the regulating valve is maintained for t2 (e.g., 5 seconds) (which can effectively avoid the continuous increase of the pressure wave), and this is repeated until the flow regulating valve is completely closed. Here, t1 can be any duration within a preset range (e.g., 10 - 15 seconds), and t2 can be any duration within a preset range (e.g., 5 - 10 seconds). This application does not make specific limitations on this.

[0063] The above steps can avoid a sharp change in the flow velocity of the secondary coolant, causing a large fluctuation in the liquid pressure, such that the valve or pump and the pipe wall are subjected to the impact of alternating high-frequency pressure waves and decompression waves, namely the water hammer phenomenon.

[0064] As an alternative embodiment, the speed control module is further configured to, when the number of loads connected to the target pump is the second number, reduce the speed of the target pump at a third rate so that the outlet pressure value of the target pump is reduced to a second preset pressure value, where the second number is the number within the second gradient range in the gradient control table.

[0065] Exemplarily, the second gradient range can be (50%, 75%], indicating that the number of loads in the second gradient range is greater than 50% of the total load and less than or equal to 75% of the total load.

[0066] Figure 5 This is another speed and flow rate change diagram provided by this application, mainly applicable to the case where the number of set-open loads is the second number.

[0067] When some of the end loads are set to closed, the total load of the liquid cooling system decreases slightly, and the control outlet pressure value is reduced to A2. When the change (decrease amount) of the outlet pressure value is greater than or equal to d%, the pump speed reference Figure 5 During the change of the B2 curve, the frequency of reducing the pump speed is reduced at a rate of v3 less than v1, so that the outlet pressure value is reduced to the second preset pressure value A2.

[0068] As an alternative embodiment, the flow rate adjustment module is further configured to reduce the flow rate and decrease the opening. Specifically, when the outlet pressure value is reduced to the second preset pressure value, the flow rate is continuously reduced at a fourth rate within a third duration, and the opening of the flow regulating valve is continuously maintained at a second opening within a fourth duration after the third duration, where the second opening is the opening of the flow regulating valve at the end of the third duration; the flow rate adjustment module is further configured to iteratively execute the steps of reducing the flow rate and decreasing the opening until the flow regulating valve is closed.

[0069] Exemplarily, for the flow regulating valve of the set-closed end load, refer to Figure 5Regarding the change of the C2 curve, the flow rate through the load is reduced at a rate v4 less than v2, and the opening degree of the flow control valve is adjusted. After t3 (e.g., 10 seconds), the opening degree of the control valve is maintained for t4 (e.g., 5 seconds), and this is repeated until the flow control valve is completely closed. Here, t2 can be any duration within a preset interval (e.g., 10 - 15 seconds), and t4 can be any duration within a preset interval (e.g., 5 - 10 seconds). This application does not make specific limitations on this.

[0070] Since the outlet pressure value decreases significantly, the rotation speed of the pump is reduced, the fluid delivery time is extended, and the internal pressure change speed of the liquid cooling is slowed down.

[0071] As an alternative embodiment, the rotation speed control module is further configured to, when the number of loads connected to the target pump is the third number, if the outlet pressure value of the target pump is greater than or equal to the pressure threshold, reduce the rotation speed of the target pump at the fifth rate to reduce the outlet pressure value to the third preset pressure value; if the outlet pressure value is less than the pressure threshold, reduce the rotation speed of the target pump at the fifth rate to reduce the outlet pressure value to the fourth preset pressure value, where the third number is the number within the third gradient range in the gradient control table.

[0072] Exemplarily, the second gradient range can be (0, 50%], indicating that the number of loads in the second gradient range is greater than 0 and less than or equal to 50% of the total load.

[0073] Specifically, the pressure threshold in this application can be set to one - half of the maximum pressure value.

[0074] Figure 6 This is another rotation speed and flow rate change diagram provided by this application, mainly applied to the case where the number of set - open loads is the third number.

[0075] For the case where the number of set - open loads is within the second gradient range, control the outlet pressure value to drop to A3 (perform the operation in the first stage), and A3 accounts for 25% - 50% of the maximum pressure value. If the current outlet pressure value is already lower than 50% of the maximum pressure value, then perform the operation in the second stage.

[0076] The operation corresponding to the first stage is: when some of the end - load is set to closed, the total load of the liquid cooling system decreases slightly, and control the outlet pressure value to drop to A3. The pump rotation speed reference Figure 6 Regarding the change of the B3 curve, reduce the frequency of the pump rotation speed at a rate v5 less than v3 to reduce the outlet pressure value to the third preset pressure value A3, and maintain for a time t5 (e.g., 10 seconds).

[0077] The operations corresponding to the second stage are as follows: control the outlet pressure value to decrease from the third preset pressure value A3 to the fourth preset pressure value A4 (10% - 25% of the maximum pressure value), decrease the frequency of the pump speed at a rate v5 less than v3, so that the outlet pressure value decreases to the fourth preset pressure value A4, and after maintaining for a time t5 (for example, 10 seconds), the pump is turned off.

[0078] In this application, by controlling the outlet pressure value in a gradient manner, the pump speed is effectively adjusted, avoiding the useless working energy consumption of the pump.

[0079] As an alternative embodiment, the flow rate adjustment module is further configured to execute reducing the flow rate and decreasing the opening degree. Specifically, when the outlet pressure value decreases to the third preset pressure value or the fourth preset pressure value, continuously reduce the flow rate at a sixth rate within a fifth time period, and keep the opening degree of the flow rate regulating valve at a third opening degree within a sixth time period after the fifth time period, where the third opening degree is the opening degree of the flow rate regulating valve at the end moment of the fifth time period; the flow rate adjustment module is further configured to iteratively execute the steps of reducing the flow rate and decreasing the opening degree until the flow rate regulating valve is closed.

[0080] Exemplarily, for the flow rate regulating valve of the closed end load, refer to Figure 6 the change of the C3 curve in, reduce the flow rate through the load at a rate v6 less than v4, and adjust the opening degree of the flow rate regulating valve. After maintaining for a time t3 (for example, 10 seconds), the opening degree of the regulating valve is maintained for t6 (for example, 10 seconds), and so on until the flow rate regulating valve is completely closed.

[0081] This application combines the control of the closing speed of the flow rate regulating valve, reduces the flow velocity in the pipeline, prolongs the pipeline closing time, and reduces the water hammer pressure.

[0082] As an alternative embodiment, the flow rate adjustment module is further configured to control the opening degree of the flow rate regulating valve to be fixed at the opening degree threshold until the flow rate regulating valve is closed when the opening degree of the flow rate regulating valve reaches the opening degree threshold.

[0083] Exemplarily, during the process of adjusting the opening degree of the flow rate regulating valve, if the first stage is executed, when the opening degree reaches the opening degree threshold k, keep the opening degree unchanged at k; if the second stage is executed, when the opening degree reaches the opening degree threshold k, keep the opening degree unchanged at k until the pump is turned off, and at this time, the adjusting flow valve is also closed.

[0084] This application also provides an optional gradient control table as shown in Table 1:

[0085] Table 1

[0086] Total end load setting Pump target outlet control pressure Pump maximum speed (0，25％] m1％ n1 (25％，50％] m2％ n2 (50％，75％] m3％ n3 (75％，100％] m4％ n4 (100％，+∞] A0 n5

[0087] Among them, the pump target outlet control pressure and maximum speed are shown in Table 1, which are set according to the total terminal load. A0 is the maximum outlet pressure value, m1%~m4% is the percentage of A0, and n1~n5 is the maximum speed of the pump, which is used to limit the maximum speed of the pump at different gradients. Pump speed reduction rate v1≥v3≥v5, flow valve closing rate v2≥v4≥v6, m1%: 10~25%; m2%: 25~50%; m3%: 50~75%; m4%: 75~100%; speed: n1≤n2≤n3≤n4≤n5.

[0088] It should be noted that the values ​​in the above table can be adjusted according to actual conditions, and this application does not limit the specific values.

[0089] like Figure 7 As shown, the present application also provides a schematic diagram of a hydraulic system, wherein 2 pumps (may include liquid storage tank components) provide power for the liquid cooling system, 1 pressure sensor 1 is used to detect the inlet pressure value of the pump, 3 pressure sensor 2 is used to detect the outlet pressure value of the pump, 4-heat exchanger is a heat exchanger for cooling the liquid cooling system, terminal 1 and terminal 2 are short-distance user terminals (corresponding to the load of the present application), terminal 1 is connected to 5-flow valve 1, terminal 2 is connected to 6-flow valve 2, terminal n is a long-distance user terminal (corresponding to the load of the present application), terminal n is connected to n-flow valve n, and each terminal is connected to a flow valve (corresponding to the flow regulating valve of the present application). Next, the schematic diagram is described in detail.

[0090] As an optional embodiment, the speed control module includes: a target pump, used to power the liquid cooling system by conveying fluid; a pressure sensor, connected to the target pump, used to detect the outlet pressure value of the target pump; and a heat exchanger, connected to the target pump, used to cool the fluid output by the target pump.

[0091] Optionally, the speed control module further includes a pressure sensor for detecting an inlet pressure value of the target pump, and the inlet pressure value is detected to detect whether the pump can be used normally.

[0092] As an optional embodiment, the flow regulating module includes: a plurality of flow regulating units for regulating the flow passing through the load, wherein the flow regulating units are connected in parallel.

[0093] Optionally, the load is divided into a short-distance user terminal load and a long-distance user terminal load.

[0094] As an optional embodiment, the flow regulating unit includes a flow regulating valve and a load, the flow regulating valve is connected to the load, and the flow regulating valve is used to regulate the flow passing through the load according to the flow regulating strategy.

[0095] Specifically, the flow rate through the load can be adjusted by adjusting the opening degree of the flow rate regulating valve.

[0096] The present application adopts a liquid cooling method, including: using a gradient control table to determine a speed control strategy and a flow rate adjustment strategy that match the number of loads connected to the target pump of the liquid cooling system, wherein the gradient control table is used to record the gradient speed control strategy and the flow rate adjustment strategy; controlling the speed of the target pump according to the speed control strategy; and adjusting the flow rate of the flow rate regulating valve of the liquid cooling system according to the flow rate adjustment strategy when the speed of the target pump reaches a preset condition. By using the gradient control table to determine the speed control strategy and the flow rate adjustment strategy that match the number of loads, and adjusting the speed of the target pump and the flow rate through the load according to the above strategies, the problem that operating at a fixed speed or controlling the speed of the pump according to a certain outlet pressure value of the pump will increase the system energy consumption is solved.

[0097] The above are only specific embodiments of the present application, enabling those skilled in the art to understand or implement the present application. Various modifications to these embodiments will be obvious to those skilled in the art. The general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to these embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features claimed herein.

Claims

1. A liquid cooling system, characterized in that, Including: A rotation speed control module, configured to determine a rotation speed control strategy matching the number of loads connected to a target pump of the liquid cooling system by using a gradient control table, and control the rotation speed of the target pump according to the rotation speed control strategy, wherein the gradient control table is used to record the gradient rotation speed control strategy and the flow rate adjustment strategy; A flow rate adjustment module, connected to the rotation speed control module, configured to adjust the flow rate of a flow rate adjustment valve of the liquid cooling system by using the flow rate adjustment strategy corresponding to the rotation speed control strategy after the rotation speed control module controls the rotation speed of the target pump according to the rotation speed control strategy; The rotation speed control module is further configured to, when the number of loads connected to the target pump is a first number, reduce the rotation speed of the target pump at a first rate, so that the outlet pressure value of the target pump is reduced to a first preset pressure value, wherein the first number is the number within a first gradient range in the gradient control table; The flow rate adjustment module is further configured to reduce the flow rate and decrease the opening degree, specifically: when the outlet pressure value is reduced to the first preset pressure value, continuously reduce the flow rate at a second rate within a first time period, and keep the opening degree of the flow rate adjustment valve at a first opening degree within a second time period after the first time period, wherein the first opening degree is the opening degree of the flow rate adjustment valve at the end of the first time period; the flow rate adjustment module is further configured to iteratively execute the step of reducing the flow rate and decreasing the opening degree until the flow rate adjustment valve is closed; The flow rate adjustment module includes: a plurality of flow rate adjustment units, configured to adjust the flow rate flowing through the load, wherein the adjustment units are connected in parallel, each flow rate adjustment unit includes the flow rate adjustment valve and the load, and the flow rate adjustment valve is connected to the load, and the flow rate adjustment valve is configured to adjust the flow rate flowing through the load according to the flow rate adjustment strategy.

2. The system according to claim 1, characterized in that, The rotation speed control module is further configured to, when the number of loads connected to the target pump is a second number, reduce the rotation speed of the target pump at a third rate, so that the outlet pressure value of the target pump is reduced to a second preset pressure value, wherein the second number is the number within a second gradient range in the gradient control table.

3. The system according to claim 2, wherein The flow rate adjustment module is further configured to reduce the flow rate and decrease the opening degree, specifically: when the outlet pressure value is reduced to the second preset pressure value, continuously reduce the flow rate at a fourth rate within a third time period, and keep the opening degree of the flow rate adjustment valve at a second opening degree within a fourth time period after the third time period, wherein the second opening degree is the opening degree of the flow rate adjustment valve at the end of the third time period; the flow rate adjustment module is further configured to iteratively execute the step of reducing the flow rate and decreasing the opening degree until the flow rate adjustment valve is closed.

4. The system according to claim 1, wherein The speed control module is also used to, when the number of loads connected to the target pump is a third number, if the outlet pressure value of the target pump is greater than or equal to a pressure threshold, reduce the speed of the target pump at a fifth rate so as to reduce the outlet pressure value to a third preset pressure value; if the outlet pressure value is less than the pressure threshold, reduce the speed of the target pump at the fifth rate so as to reduce the outlet pressure value to a fourth preset pressure value, wherein the third number is a number in the third gradient range in the gradient control table.

5. The system according to claim 4, wherein, The flow regulating module is also used to reduce the flow and the opening, specifically: when the outlet pressure value is reduced to the third preset pressure value or the fourth preset pressure value, the flow is continuously reduced at a sixth rate within a fifth time period, and the opening of the flow regulating valve is continuously maintained at the third opening within a sixth time period after the fifth time period, wherein the third opening is the opening of the flow regulating valve at the end moment of the fifth time period; the flow regulating module is also used to iteratively execute the steps of reducing the flow and the opening until the flow regulating valve is closed.

6. The system according to claim 5, characterized in that, The flow regulating module is further configured to control the opening of the flow regulating valve to be fixed at the opening threshold when the opening of the flow regulating valve reaches the opening threshold until the flow regulating valve is closed.

7. The system according to claim 1, characterized in that, The speed control module comprises: The target pump is used to provide power to the liquid cooling system by conveying fluid; A pressure sensor connected to the target pump and used to detect an outlet pressure value of the target pump; A heat exchanger is connected to the target pump and is used to cool the fluid output by the target pump.

8. A liquid cooling method, characterized in that, The liquid cooling system as claimed in claim 1 comprises: Determine a speed control strategy and a flow rate regulation strategy that match the number of loads connected to a target pump of a liquid cooling system using a gradient control table, wherein the gradient control table is used to record the speed control strategy and the flow rate regulation strategy of the gradient type; Controlling the speed of the target pump according to the speed control strategy; When the rotation speed of the target pump reaches a preset condition, the flow rate of the flow regulating valve of the liquid cooling system is adjusted according to the flow regulation strategy.

9. A liquid cooling module, characterized in that, The method for implementing the liquid cooling method as claimed in claim 8 comprises: A strategy determination unit, used to determine a speed control strategy and a flow regulation strategy that match the number of loads connected to a target pump of the liquid cooling system using a gradient control table, wherein the gradient control table is used to record the speed control strategy and the flow regulation strategy of the gradient type; A speed control unit, used to control the speed of the target pump according to the speed control strategy; The flow regulating unit is used to regulate the flow of the flow regulating valve of the liquid cooling system according to the flow regulating strategy when the rotation speed of the target pump reaches a preset condition.

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