Liquid cooling unit and control method thereof, controller, storage medium and program product

Abstract

The invention provides a liquid cooling unit and a control method thereof, a controller, a storage medium and a program product. The control method of the liquid cooling unit comprises the following steps: in the working process of the liquid cooling unit comprising a plurality of liquid cooling modules, detecting the actual liquid supply temperature Tg of the liquid cooling unit; and according to the size relationship between the actual liquid supply temperature Tg and the target liquid supply temperature Ts, controlling the opening number of the liquid cooling modules. Therefore, the liquid cooling effect can be improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of liquid cooling, and particularly relates to a liquid cooling unit, a control method and a controller thereof, a storage medium and a program product. BACKGROUND

[0002] The liquid cooling unit is a cooling device that dissipates heat in the atmosphere through a cooling liquid to cool a heat load (for example, an electronic device) to meet the heat dissipation requirement of the heat load.

[0003] In order to meet higher heat dissipation requirements, some liquid cooling units include multiple liquid cooling modules. However, the conventional liquid cooling unit including multiple liquid cooling modules has a large fluctuation in the supply liquid temperature, and it is difficult to accurately control the temperature, which affects the liquid cooling effect.

[0004] The above statements are only used to provide background technical information related to the present application, and do not necessarily constitute the prior art. SUMMARY

[0005] One of the technical problems to be solved by the present application is to improve the liquid cooling effect of the liquid cooling unit.

[0006] In order to solve the above technical problem, the present application provides a control method of a liquid cooling unit, which includes:

[0007] During the operation of the liquid cooling unit including multiple liquid cooling modules, the actual supply liquid temperature T g of the liquid cooling unit is detected.

[0008] According to the size relationship between the actual supply liquid temperature T g and the target supply liquid temperature T s , the number of opened liquid cooling modules is controlled.

[0009] In some embodiments, according to the size relationship between the actual supply liquid temperature T g and the target supply liquid temperature T s , the number of opened liquid cooling modules is controlled, including at least one of the following:

[0010] In the case of T g >T s +ΔT c1 , according to the size relationship between the actual temperature drop rate ΔT and the preset temperature drop rate ΔT t1 , the number of opened liquid cooling modules is controlled.

[0011] In the case of T s -ΔT c2 ≤T g ≤T s +ΔT c1 , the number of opened liquid cooling modules is maintained unchanged.

[0012] In the case of T g <T s -ΔT c2 , the number of starting of the liquid cooling module is reduced.

[0013] Wherein, ΔT c1 and ΔT c2 are both greater than 0, the actual temperature drop rate ΔT is the actual liquid supply temperature T g in the time t per unit time.

[0014] In some embodiments, in the case of T g >T s +ΔT c1 , the number of starting of the liquid cooling module is controlled according to the size relationship between the actual temperature drop rate ΔT and the preset temperature drop rate ΔT t1 , including at least one of the following:

[0015] In the case of T g ≥T s +ΔT c , whether to increase the number of starting of the liquid cooling module is determined according to whether the actual temperature drop rate ΔT is less than or equal to the preset temperature drop rate ΔT t1 .

[0016] In the case of T s +ΔT c1 <T g <T s +ΔT c , whether to reduce the number of starting of the liquid cooling module is determined according to whether the actual temperature drop rate ΔT is greater than the preset temperature drop rate ΔT t1 .

[0017] Wherein, ΔT c > ΔT c1 .

[0018] In some embodiments, in the case of T g ≥T s +ΔT c , whether to increase the number of starting of the liquid cooling module is determined according to whether the actual temperature drop rate ΔT is less than or equal to the preset temperature drop rate ΔT t1 , including at least one of the following:

[0019] In the case of T g ≥T s +ΔT c , and ΔT > ΔT t1 , the number of starting of the liquid cooling module is maintained unchanged.

[0020] In the case of T g ≥T s +ΔT c, ΔT≤ΔT t1 , and the liquid cooling module is not all turned on, increasing the number of liquid cooling modules turned on;

[0021] In some embodiments, in T g ≥T s +ΔT c , ΔT≤ΔT t1 , and the liquid cooling module is all turned on, maintaining the number of liquid cooling modules turned on unchanged.

[0022] In some embodiments, in T s +ΔT c1 <T g <T s +ΔT c , determining whether to reduce the number of liquid cooling modules turned on according to whether the actual temperature drop rate ΔT is greater than the preset temperature drop rate ΔT t1 includes at least one of the following:

[0023] In some embodiments, in T s +ΔT c1 <T g <T s +ΔT c , and ΔT>ΔT t1 , reducing the number of liquid cooling modules turned on.

[0024] In some embodiments, in T s +ΔT c1 <T g <T s +ΔT c , and ΔT≤ΔT t1 , not reducing the number of liquid cooling modules turned on.

[0025] In some embodiments, in T s +ΔT c1 <T g <T s +ΔT c , and ΔT≤ΔT t1 , not reducing the number of liquid cooling modules turned on includes at least one of the following:

[0026] In some embodiments, in T s +ΔT c1 <T g <T s +ΔT c , and k*ΔT t1 ≤ΔT≤ΔT t1 , maintaining the number of liquid cooling modules turned on unchanged.

[0027] In some embodiments, in T s +ΔT c1 <Tg <T s +ΔT c , and ΔT < k*ΔT t1 , increase the number of open liquid cooling modules;

[0028] wherein 0 < k < 1.

[0029] In some embodiments, 0.1 ≤ k ≤ 0.9.

[0030] In some embodiments, 0.1 ≤ k ≤ 0.4.

[0031] In some embodiments, the control method is configured to at least one of:

[0032] In the process of increasing the number of open liquid cooling modules, the liquid cooling modules are sequentially opened in order of cumulative running time from short to long;

[0033] In the process of increasing the number of open liquid cooling modules, the liquid cooling modules are opened according to an opening time interval;

[0034] In the process of reducing the number of open liquid cooling modules, the liquid cooling modules are sequentially closed in order of cumulative running time from long to short;

[0035] In the process of reducing the number of open liquid cooling modules, the liquid cooling modules are closed according to a shutdown time interval.

[0036] In some embodiments, the opening time interval and / or the shutdown time interval is greater than t.

[0037] In some embodiments, when T g <T s -ΔT c2 , the number of open liquid cooling modules is reduced by at least one of:

[0038] In the case of T s -ΔT c3 <T g <T s -ΔT c2 , the liquid cooling modules are closed according to a shutdown time interval to reduce the number of open liquid cooling modules;

[0039] In the case of T g ≤T s -ΔT c3 , the liquid cooling modules are closed urgently to reduce the number of open liquid cooling modules;

[0040] wherein ΔT c3 > ΔT c2 .

[0041] In addition, the application further provides a controller, comprising a memory and a processor coupled to the memory, the processor being configured to execute the control method of any one of the embodiments based on instructions stored in the memory.

[0042] In addition, the application further provides a liquid cooling unit, comprising a plurality of liquid cooling modules, and further comprising the controller of any one of the embodiments.

[0043] In some embodiments, the fan of the liquid cooling module is arranged at the side of the shell and performs side air outlet; and / or the liquid cooling module comprises a plurality of condensers connected in parallel.

[0044] In some embodiments, the plurality of condensers are arranged on opposite sides of the central axis of the fan arranged at the side of the shell; and / or the plurality of condensers have different heat exchange areas.

[0045] In some embodiments, the plurality of condensers comprise a first condenser and a second condenser, the first condenser and the second condenser being arranged on opposite sides of the central axis of the fan and respectively having an L shape and a linear shape.

[0046] In addition, the application further provides a computer readable storage medium, characterized in that the computer readable storage medium stores computer instructions, and the computer instructions are executed by a processor to implement the control method of any one of the embodiments.

[0047] In addition, the application further provides a computer program product, comprising a computer program, and the computer program, when executed by a processor, implements the control method of any one of the embodiments.

[0048] By detecting the actual liquid supply temperature of the liquid cooling unit during the working process of the liquid cooling unit, and controlling the number of opened liquid cooling modules of the liquid cooling unit according to the size relationship between the actual liquid supply temperature and the target liquid supply temperature, the actual liquid supply temperature and the target liquid supply temperature can be kept consistent, the liquid supply temperature fluctuation can be effectively reduced, the temperature control precision can be improved, and the liquid cooling effect can be improved.

[0049] Other features and advantages of the application will become apparent from the following detailed description of exemplary embodiments thereof, taken in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF DRAWINGS

[0050] The accompanying drawings, which are included to provide a further understanding of the application, illustrate embodiments of the application and together with the description serve to explain the application. In the drawings:

[0051] Figure 1 FIG. 1 is a structural diagram of a liquid cooling unit in an embodiment of the application.

[0052] Figure 2 FIG. 2 is a schematic diagram of the working principle of a liquid cooling module in an embodiment of the application.

[0053] Figure 3 A perspective view of a liquid cooling module in an embodiment of the present application.

[0054] Figure 4 A side view of the liquid cooling module. Figure 3

[0055] A rear view of the liquid cooling module. Figure 5 Figure 3 A top view of the liquid cooling module.

[0056] Figure 6 Figure 3 A top view of the liquid cooling module with the shell top cover omitted.

[0057] Figure 7 A flowchart of a control method in an embodiment of the present application.

[0058] Figure 8 A specific flowchart of a control method in an embodiment of the present application.

[0059] Explanation of reference signs:

[0060] 100, liquid cooling unit;

[0061] 1, liquid cooling module; 2, shell; 3, compressor; 4, condenser; 41, first condenser; 42, second condenser; 5, throttle valve; 6, heat exchanger; 7, vapor-liquid separator; 8, fan; 9, control valve; 10, liquid inlet; 11, liquid outlet; 12, liquid return flange interface; 13, liquid supply flange interface; 14, total liquid return port; 15, total liquid supply port; 16, total liquid return pipe; 17, total liquid supply pipe; 18, pump; 19, temperature sensor; 20, electric control box. DETAILED DESCRIPTION

[0062] The technical solutions in the embodiments of the present application will be described clearly and completely below in conjunction with the drawings in the embodiments of the present application. The described embodiments are only some of the embodiments of the present application, but not all the embodiments. The description of the at least one exemplary embodiment is actually only illustrative, but not as any limitation on the present application and its application or use.

[0063] In the description of the present application, the words “first”, “second”, etc. used to limit parts are only for the convenience of distinguishing the corresponding parts, and have no special meaning, unless otherwise stated. Therefore, it cannot be understood as a limitation on the protection scope of the present application.

[0064] ​​In the description of the present application, it should be understood that the orientation words such as "front, back, up, down, left, right", "transverse, vertical, perpendicular, horizontal" and "top, bottom" and the like indicated orientation or position relationship are generally based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, without the opposite description, these orientation words do not indicate and imply that the indicated device or element must have a specific orientation or be constructed and operated in a specific orientation, therefore it cannot be understood as a limitation on the scope of protection of the present application; the orientation words "inner, outer" refer to the inner and outer of the contour of each component itself.

[0065] In addition, the technical features involved in the different embodiments of the application described below can be combined with each other as long as there is no conflict between them.

[0066] In order to improve the liquid cooling effect of the liquid cooling unit, the present application provides a liquid cooling unit, a control method, a controller, a storage medium and a program product thereof.

[0067] Figures 1-8 The structure and control method of the liquid cooling unit in the present application are exemplarily shown.

[0068] For the convenience of understanding, first, the structure of the liquid cooling unit will be described. Figures 1-6 The structure of the liquid cooling unit will be described.

[0069] Referring to Figure 1 In the present application, the liquid cooling unit 100 includes a plurality of (at least two, i.e. two, three or more) liquid cooling modules 1. The plurality of liquid cooling modules 1 are arranged in parallel. The liquid inlet 10 of each liquid cooling module 1 is coupled to the heat load through the total liquid return pipe 16 of the liquid cooling unit 100, and the liquid outlet 11 of each liquid cooling module 1 is coupled to the heat load through the total liquid supply pipe 17 of the liquid cooling unit 100, to realize the circulating flow of the cooling liquid between the heat load and the liquid cooling unit 100, so that the cooling liquid flowing through the heat load can flow into the total liquid return pipe 16 through the total liquid return port 14 of the total liquid return pipe 16, and flow to the liquid inlet 10 of the opened liquid cooling module 1 through the total liquid return pipe 16, enter the corresponding opened liquid cooling module 1, and after being cooled by the corresponding opened liquid cooling module 1, can flow out through the liquid outlet 11 of the corresponding opened liquid cooling module 1, flow into the total liquid supply pipe 17, and flow to the heat load through the total liquid supply port 15 of the total liquid supply pipe 17, to cool and dissipate heat for the heat load, reduce the temperature of the heat load, and prevent the heat load from being damaged due to high temperature.

[0070] In order to drive the flow of the cooling liquid, referring to Figure 1 In some embodiments, a pump 18 is provided on the total liquid return pipe 16. In this way, the cooling liquid can circulate between the liquid cooling unit 100 and the heat load under the drive of the pump 18.

[0071] In addition, referring to Figure 1In some embodiments, the liquid cooling unit 100 further comprises a temperature sensor 19 to detect the temperature of the cooling liquid. For example, see Figure 1 In some embodiments, the total liquid supply pipe 17 is provided with a temperature sensor 19, and the corresponding temperature sensor 19 detects the temperature of the cooling liquid in the total liquid supply pipe 17, specifically the temperature of the cooling liquid at the total liquid supply port 15 of the total liquid supply pipe 17, that is, the temperature of the liquid supply of the liquid cooling unit 100. For another example, see Figure 1 In some embodiments, the total liquid return pipe 16 is provided with a temperature sensor 19, and the corresponding temperature sensor 19 detects the temperature of the cooling liquid in the total liquid return pipe 16, specifically the temperature of the cooling liquid at the total liquid return port 14 of the total liquid return pipe 16, that is, the temperature of the liquid return of the liquid cooling unit 100.

[0072] Figure 1 The structure of the liquid cooling module 1 is simplified in Figures 2-6 The more detailed structure of the liquid cooling module 1 is further shown in

[0073] Figure 2 The working principle of the liquid cooling module is shown in the schematic diagram. See Figure 2 The liquid cooling module 1 comprises a compressor 3, a condenser 4, a throttle valve 5 (for example, an electronic expansion valve), a heat exchanger 6 (for example, a plate heat exchanger), a vapor-liquid separator 7, and a fan 8. The compressor 3, the condenser 4, the throttle valve 5, the heat exchanger 6, and the vapor-liquid separator 7 are connected through refrigerant pipelines to form a refrigeration circuit, so that the refrigerant can circulate in the refrigeration circuit. At the same time, the heat exchanger 6 is connected with the total liquid return pipe 16 and the total liquid supply pipe 17 through cooling liquid pipelines to form a liquid supply circuit, so that the cooling liquid can circulate in the liquid supply circuit. The fan 8 is used to promote the heat exchange between the condenser 4 and the environment.

[0074] In operation, in the liquid supply circuit, the high-temperature cooling liquid enters the heat exchanger 6 through the liquid inlet 10, exchanges heat with the low-temperature refrigerant, and becomes low-temperature cooling liquid. The low-temperature cooling liquid flowing out of the heat exchanger 6 flows to the heat load through the liquid outlet 11 and the total liquid supply pipe 17, realizing the supply of the low-temperature cooling liquid to the heat load. In the refrigeration circuit, the low-temperature and low-pressure liquid refrigerant exchanges heat with the refrigerant at the heat exchanger 6 and becomes gaseous refrigerant. After removing water by the vapor-liquid separator 7, the gaseous refrigerant enters the compressor 3 and becomes high-temperature and high-pressure gaseous refrigerant. Subsequently, the gaseous refrigerant flows through the condenser 4, releases heat to the environment under the action of the fan 8, and becomes liquid refrigerant. Finally, the liquid refrigerant passes through the throttle valve 5 and becomes low-temperature and low-pressure liquid refrigerant, returning to the heat exchanger 6 to exchange heat with the high-temperature cooling liquid.

[0075] The number of condensers 4 is not limited and can be one or more. In the case where the liquid cooling module 1 includes multiple condensers 4, the multiple condensers 4 can be connected in parallel to more flexibly meet different heat exchange requirements. For example, in the case where multiple condensers 4 are provided in parallel, the condensing area can be changed by controlling the number of condensers 4 participating in the refrigerant circulation to meet the condensing requirements under different ambient temperatures.

[0076] The temperature of the working environment of the liquid cooling module 1 is different, and the heat exchange temperature difference in the refrigeration system is different. The lower the ambient temperature, the greater the heat exchange temperature difference in the refrigeration system, for example, the heat exchange temperature difference in a low-temperature environment can be 2-3 times that in a normal-temperature environment. The greater the heat exchange temperature difference, the stronger the heat exchange capacity between the refrigerant and the environment, so that the refrigerant needs to be cooled to the same temperature to cool the cooling liquid to the same temperature, and the supply liquid temperature is constant, and the condensing area is smaller. Therefore, in a low-temperature environment, part of the multiple condensers 4 connected in parallel can be prevented from participating in the refrigerant circulation, and the number of condensers 4 participating in the circulation can be reduced to reduce the condensing area, compensate for the influence of the increase in the heat exchange temperature difference, and improve the stability of the supply liquid temperature. Moreover, in a low-temperature environment, it is difficult to establish a suitable pressure difference for the compressor, and reducing the number of condensers 4 participating in the circulation and the condensing area is conducive to preventing the refrigerant from being excessively heated and having a too low temperature and a too low pressure, which is conducive to the compressor to quickly establish a suitable pressure difference.

[0077] For example, referring to Figure 2 In some embodiments, the liquid cooling module 1 includes two condensers 4, namely a first condenser 41 and a second condenser 42, the first condenser 41 and the second condenser 42 are connected in parallel, and a control valve 9 (such as an electromagnetic valve) is arranged on the branch of the first condenser 41 to control the opening and closing of the branch of the first condenser 41 and to control whether the first condenser 41 participates in the refrigerant circulation. In this way, in a low-temperature environment, the control valve 9 can be closed to disconnect the branch of the first condenser 41, so that the first condenser 41 no longer participates in the refrigerant circulation and no longer exchanges heat with the refrigerant, thereby reducing the condensing area, promoting the compressor 3 to quickly establish a pressure difference, and improving the stability of the supply liquid temperature.

[0078] The heat exchange areas of the first condenser 41 and the second condenser 42 can be equal or unequal, or the heat exchange areas of the multiple condensers 4 connected in parallel can be equal or unequal. When the heat exchange areas of the multiple condensers 4 are unequal, in a low-temperature environment, the branch of the condenser 4 with a larger heat exchange area can be disconnected first, for example, in the case where the heat exchange area of the first condenser 41 is larger than that of the second condenser 42, the branch of the first condenser 41 can be disconnected first in a low-temperature environment to more effectively reduce the condensing area, more effectively promote the compressor 3 to establish a pressure difference, and improve the stability of the supply liquid temperature.

[0079] In addition, the plurality of condensers 4 are arranged in parallel, which not only facilitates the compressor 3 to establish pressure difference and improves the stability of the supply liquid temperature, but also facilitates the flexible arrangement of the condensers 4 according to the actual space in the shell 2 of the liquid cooling module 1, fully utilizes the space, improves the space utilization, especially facilitates the full utilization of the space, the improvement of the space utilization, the increase of the condensing area as much as possible in the limited space, and the enhancement of the condensing capacity in the case that the liquid cooling module 1 adopts the fan side placement mode as mentioned below.

[0080] Figures 3-6 The arrangement schematic diagram of each component of the liquid cooling module 1 is shown. Referring to Figures 3-6 In some embodiments, the fan 8 is arranged at the side of the shell 2 of the liquid cooling module 1 to perform side air outlet.

[0081] The conventional liquid cooling module 1 has the fan 8 arranged at the top of the shell 2 to perform top air outlet. This fan top placement and top air outlet arrangement mode stipulate the heat dissipation air outlet direction, and in the working environment with the top space closed, there is a lot of wind waste because most of the wind blows to the roof, so it is difficult to effectively meet the liquid cooling demand of the working environment with the top space closed, which restricts the popularization and application of the liquid cooling unit 100 in the working environment with the top space closed. When the fan 8 performs top air outlet, the axis of the fan 8 is vertical or inclined.

[0082] However, by arranging the fan 8 at the side of the shell 2 to perform side air outlet, the liquid cooling module 1 becomes a universal liquid cooling module capable of performing side air outlet, so that the liquid cooling demand of the working environment with the top space closed can be effectively met, and the popularization and application of the liquid cooling unit 100 in the working environment with the top space closed is improved. When the fan 8 is arranged at the side of the shell 2 to perform side air outlet, the axis of the fan 8 can be horizontal.

[0083] In the case of the fan side placement, referring to Figures 3-5 The fan 8 and the electric control box 20 of the liquid cooling module 1 can be arranged at the front and back of the shell 2, for example, the fan 8 is arranged at the back of the shell 2, and the electric control box 20 is arranged at the front of the shell 2. Since the fan 8 is arranged at the back of the shell 2, the fan 8 is placed on the side to realize side air outlet and effectively meet the side air outlet demand. Moreover, since the electric control box 20 is prone to failure, arranging the electric control box 20 at the front of the shell 2 is more convenient for maintenance.

[0084] In addition, referring to Figure 3 In some embodiments, the front of the shell 2 is not only provided with the electric control box 20, but also provided with the liquid supply flange interface 13 and the liquid return flange interface 12 to connect the liquid supply and return pipelines.

[0085] When the fan is placed on the side, multiple parallel condensers 4 are particularly suitable to be arranged, so as to make full use of the space on both sides of the central axis of the fan 8, improve the space utilization, increase the condensing area as much as possible in the limited space, and enhance the condensing capacity.

[0086] For example, referring to Figure 5 In some embodiments, when the fan 8 is arranged on the side of the shell 2, the first condenser 41 and the second condenser 42 mentioned above are arranged on the opposite sides of the central axis of the fan 8 and are in L shape and straight line shape (or straight plate shape) respectively. Specifically, when the fan 8 is arranged on the back of the shell 2, the first condenser 41 and the second condenser 42 in L shape and straight line shape respectively can be arranged on the left and right sides of the fan 8 and close to the side wall of the shell 2. The left and right sides of the shell 2 form the air inlet surface of the first condenser 41 and the second condenser 42.

[0087] The above arrangement can make full use of the space on both sides of the central axis of the fan 8 in the shell 2, improve the space utilization, enhance the structural compactness, reduce the space occupation of the liquid cooling module 1, maximize the condensing area as much as possible in the limited space, and enhance the condensing capacity. Moreover, more space can be left between the first condenser 41 and the second condenser 42 to arrange other components such as the heat exchanger 6, the compressor 3 and the vapor-liquid separator 7, so as to realize the reasonable arrangement of the heat exchanger 6, the compressor 3 and the vapor-liquid separator 7 and other components, for example, the heat exchanger 6 and the compressor 3 can be arranged close to the fan 8 to facilitate maintenance.

[0088] In addition, the first condenser 41 and the second condenser 42 are respectively configured in L shape and straight line shape, so that the heat exchange areas of the first condenser 41 and the second condenser 42 are different, and the heat exchange area of the first condenser 41 is larger than that of the second condenser 42. This also facilitates the effective compensation of the influence of the increased heat exchange temperature difference by closing the first condenser 41 with larger heat exchange area in low temperature environment, improves the stability of the liquid supply temperature, and promotes the establishment of pressure difference by the compressor.

[0089] Next, the control method of the present application will be introduced in combination with Figure 7 and Figure 8 .

[0090] The control method of the present application is applicable to various liquid cooling units 100 (also referred to as modular liquid cooling units) comprising a plurality of liquid cooling modules 1, wherein the liquid cooling module 1 can adopt the structure of the fan side-mounted and multiple condensers in the present application, or the structure of the traditional fan top-mounted and single condenser. In other words, the control method of the present application can be used not only in the liquid cooling unit 100 with the liquid cooling module 1 adopting the structure of the fan side-mounted and / or multiple condensers, but also in the liquid cooling unit 100 with the liquid cooling module 1 adopting the structure of the fan top-mounted and / or single condenser.

[0091] As mentioned above, the supply liquid temperature is the temperature of the cooling liquid at the total supply liquid port 15 of the liquid cooling unit 100, and is the temperature of the cooling liquid flowing from the liquid cooling unit 100 to the heat load. Therefore, the supply liquid temperature directly affects the cooling and heat dissipation effect on the heat load, i.e., directly affects the liquid cooling effect.

[0092] During the operation of the liquid cooling unit 100, a target supply liquid temperature (for example, input by a user) is usually set for the liquid cooling unit 100, and it is desired that the actual supply liquid temperature of the liquid cooling unit 100 is stabilized near the corresponding target supply liquid temperature to achieve the required liquid cooling effect. However, in actual operation, the heat load is usually in a random change state, and the temperature of the cooling liquid flowing from the heat load to the liquid cooling unit 100 (return liquid temperature) also fluctuates accordingly. In this case, if the liquid cooling unit 100 cannot respond to the change of the heat load in time, the supply liquid temperature will fluctuate greatly, the temperature control will be inaccurate, it will be difficult to reduce the temperature of the heat load to the required temperature, and the liquid cooling effect will be affected.

[0093] In order to improve the stability of the supply liquid temperature, some measures have been taken in the related art, but these measures generally only adjust the supply liquid temperature by adjusting the internal operating parameters of the opened liquid cooling modules 1, and the effect is not ideal.

[0094] For example, some modular liquid cooling units 100 first open a certain number of liquid cooling modules 1 after receiving a start command, and the number of opened liquid cooling modules 1 does not change in the subsequent operation process, but relies on adjusting the compressor frequency of the opened liquid cooling modules 1 to adjust the supply liquid temperature.

[0095] However, the compressor frequency and other internal operating parameters of the liquid cooling module 1 only directly affect the temperature of the cooling liquid at the supply port of the responding module, and the influence on the supply liquid temperature (the overall supply liquid temperature or the total supply liquid temperature) of the liquid cooling unit 100 is lagging, so the adjustment effect is not ideal, the supply liquid temperature still fluctuates greatly, it is difficult to accurately control the temperature, and the liquid cooling effect is affected.

[0096] In view of the above problems, the present application provides a control method of a liquid cooling unit 100.

[0097] Referring to Figure 7 and Figure 8 In the present application, the control method of the liquid cooling unit 100 comprises:

[0098] S100, detecting the actual supply liquid temperature T g of the liquid cooling unit 100 during the operation of the liquid cooling unit 100 comprising a plurality of liquid cooling modules 1.

[0099] S200, according to the size relationship between the actual supply liquid temperature T g and the target supply liquid temperature T s , control the number of opened liquid cooling modules 1.

[0100] It can be understood that the actual supply liquid temperature T g is the actual value of the supply liquid temperature of the liquid cooling unit 100, or in other words, it is the actual temperature of the cooling liquid at the total supply port 15 of the total supply pipe 17 of the liquid cooling unit 100 that realizes the thermal coupling between the liquid cooling module 1 and the heat load.

[0101] Based on the above steps, during the operation of the liquid cooling unit 100, the number of opened liquid cooling modules 1 is no longer constant, but can be adjusted according to the size relationship between the actual supply liquid temperature T g and the target supply liquid temperature T s . In this way, when the actual supply liquid temperature T g and the target supply liquid temperature T s deviate greatly due to random changes in the heat load and other reasons, the actual supply liquid temperature T g can be adjusted by starting and stopping the liquid cooling module 1, increasing or decreasing the number of opened liquid cooling modules 1, adjusting the refrigeration capacity (referring to the size of the heat exchange amount per unit time, the greater the refrigeration capacity, the higher the heat exchange amount per unit time, and vice versa) of the liquid cooling unit 100, to reduce or even eliminate the deviation between the actual supply liquid temperature T g and the target supply liquid temperature T s , so that the actual supply liquid temperature T g can always be consistent with the target supply liquid temperature T s (equal or deviate within the allowable range), thereby effectively reducing the fluctuation of the actual supply liquid temperature relative to the target supply liquid temperature, improving the temperature control precision and improving the liquid cooling effect.

[0102] Since the number of started and stopped liquid cooling modules 1 has a greater and more direct impact on the supply liquid temperature than the internal operating parameters such as the compressor frequency, the supply liquid temperature can be adjusted more quickly and effectively, so that the effect of adjusting the supply liquid temperature by adjusting the number of started and stopped liquid cooling modules 1 is better, the efficiency is higher, the response to changes in the heat load is more timely, and the fluctuation of the supply liquid temperature is more effectively reduced, the temperature control precision is improved, and the liquid cooling effect is improved.

[0103] Of course, the corresponding adjustment of the number of liquid cooling modules 1 start-stop mode can be combined with the adjustment of the compressor frequency mode, for example, the control method of the present application can be used first, control the number of liquid cooling modules 1 start-stop, and then for the start of the liquid cooling module 1, adjust the compressor frequency and other ways to further adjust, to better adjust the liquid supply temperature, more effectively improve the stability of the liquid supply temperature. In addition, in the case of liquid cooling module 1 including parallel condenser 4, the corresponding adjustment of the number of liquid cooling modules 1 start-stop mode, can also be combined with the adjustment of the number of condenser 4 start-stop mode mentioned above, to more accurately adjust the liquid supply temperature, improve the liquid cooling effect.

[0104] Wherein, the target liquid supply temperature T s can be pre-set, for example, can be input by the user. The target liquid supply temperature T s of the specific value, can be set according to the actual situation. For the same heat load, the target liquid supply temperature T s may be constant, or, also can be changed according to the working condition or working environment. Different heat load, the target liquid supply temperature T s may be the same or different.

[0105] It can be seen that by detecting the actual liquid supply temperature of the liquid cooling unit 100 during the working process of the liquid cooling unit 100, and according to the size relationship between the actual liquid supply temperature and the target liquid supply temperature, the number of liquid cooling modules 1 of the liquid cooling unit 100 is controlled, which can effectively reduce the fluctuation of the liquid supply temperature, improve the temperature control precision, and improve the liquid cooling effect.

[0106] Specifically, referring to Figure 8 In some embodiments, step S200 controls the number of liquid cooling modules 1 according to the size relationship between the actual liquid supply temperature T s and the target liquid supply temperature T s includes at least one of the following:

[0107] In the case of T g >T s +ΔT c1 , according to the size relationship between the actual temperature drop rate ΔT and the preset temperature drop rate ΔT t1 , control the number of liquid cooling modules 1;

[0108] In the case of T s -ΔT c2 ≤T g ≤T s +ΔT c1 , maintain the number of liquid cooling modules 1 unchanged;

[0109] In the case of T g <T s -ΔT c2In this way, the number of starting of the liquid cooling module 1 is reduced.

[0110] It can be understood that ΔT c1 and ΔT c2 are two target liquid supply temperature deviation values, both of which are greater than 0, T s - ΔT c2 < T s + ΔT c1 . ΔT c1 and -ΔT c2 are respectively the upper limit value and the lower limit value of the difference between the allowed actual liquid supply temperature and the target liquid supply temperature. The temperature drop rate is the change value of the liquid supply temperature per unit time within the time t. The actual temperature drop rate ΔT is the change value per unit time of the actual liquid supply temperature T g within the time t, that is, ΔT = |T2-T1| / t, T1 and T2 are the first and last actual liquid supply temperatures within the time t.

[0111] In the above manner, according to the deviation between the actual liquid supply temperature T g and the target liquid supply temperature T s , the actual liquid supply temperature is divided into three temperature intervals (or levels), which are respectively a first temperature interval (T s + ΔT c1 , +∞), a second temperature interval [T s - ΔT c2 , T s + ΔT c1 ] and a third temperature interval (-∞, T s - ΔT c2 ], and different ways are taken for different temperature intervals to adjust the start-stop number of the liquid cooling module 1, so that it is beneficial to make the start-stop number of the liquid cooling module 1 more in line with the actual demand, and to more accurately adjust the liquid supply temperature and more effectively improve the liquid cooling effect.

[0112] Wherein, when the actual liquid supply temperature T g is in the second temperature interval [T s - ΔT c2 , T s + ΔT c1 ], that is, when T s - ΔT c2 ≤ T g ≤ T s + ΔT c1 , it is indicated that the actual liquid supply temperature T g is different from the target liquid supply temperature T sThe deviation between the actual supply liquid temperature and the target supply liquid temperature is not large, and is within the allowable range, so that the liquid cooling demand of the heat load can be effectively met. In this case, the number of opened liquid cooling modules 1 is maintained unchanged, and the liquid cooling modules 1 are not started and stopped, so that the supply liquid temperature can be maintained stable, the liquid cooling demand can be met, a better liquid cooling effect can be achieved, and meanwhile, the control process can be simplified, and the liquid cooling modules 1 are prevented from being frequently started and stopped.

[0113] When the actual supply liquid temperature T g is in the third temperature interval (-∞, T s -ΔT c2 ), that is, when T g <T s -ΔT c2 , it indicates that the actual supply liquid temperature is low, the refrigeration capacity is excessive, and there is waste of cold energy. In this case, part of the opened liquid cooling modules 1 are closed, and the number of opened liquid cooling modules 1 is reduced, so that the refrigeration capacity of the liquid cooling unit 100 can be reduced, the actual supply liquid temperature can be increased, the deviation between the actual supply liquid temperature and the target supply liquid temperature can be reduced, and the actual supply liquid temperature gradually increases to be consistent with the target supply liquid temperature. Therefore, the supply liquid temperature fluctuation can be reduced, the stability of the supply liquid temperature can be improved, the liquid cooling effect can be improved, and the waste of cold energy can be reduced.

[0114] In the case of T g <T s -ΔT c2 , either the same way can be used to reduce the number of opened liquid cooling modules 1 in the entire temperature interval, or the corresponding temperature interval can be further subdivided, and different ways can be used to reduce the number of opened liquid cooling modules 1 for different subdivided sub-temperature intervals.

[0115] For example, in some embodiments, in the case of T g <T s -ΔT c2 , the number of opened liquid cooling modules 1 is reduced by at least one of the following:

[0116] In the case of T s -ΔT c3 <T g <T s -ΔT c2 , the liquid cooling modules 1 are closed according to the shutdown time interval to reduce the number of opened liquid cooling modules 1;

[0117] In the case of T g ≤T s -ΔT c3 , the liquid cooling modules 1 are urgently closed to reduce the number of opened liquid cooling modules 1.

[0118] Wherein, ΔT c3 is a preset deviation value, which is greater than ΔTc2 That is, ΔT c3 > ΔT c2 Thus, -ΔT c3 < -ΔT c2 , T s -ΔT c3 < T s -ΔT c2 .

[0119] The above scheme further subdivides the third temperature interval (-∞, T s -ΔT c2 ], specifically, with T s -ΔT c3 as the demarcation point, the third temperature interval (-∞, T s -ΔT c2 ] is subdivided into (T s -ΔT c3 , T s -ΔT c2 ) and (-∞, T s -ΔT c3 ], and for the two sub-intervals, different ways are taken to turn off the liquid cooling module 1 and reduce the number of times the liquid cooling module 1 is turned on.

[0120] When the actual liquid supply temperature T g is in the sub-interval (T s -ΔT c3 , T s -ΔT c2 ), that is, when T s -ΔT c3 < T g < T s -ΔT c2 , it indicates that the actual liquid supply temperature is low, but the deviation from the target liquid supply temperature is small. In this case, the liquid cooling module 1 is turned off according to the shutdown time interval, that is, not all the liquid cooling modules 1 are turned off at once, but they are turned off one by one, and after one is turned off, the next one is not immediately turned off, but is turned off after a third time interval. In this way, the number of times the liquid cooling module 1 is turned on can be effectively reduced, the actual liquid supply temperature can be gradually increased to be consistent with the target liquid supply temperature, the actual liquid supply temperature fluctuation can be reduced, and each liquid cooling module 1 to be turned off can be provided with a certain buffer time before being turned off, preventing problems caused by sudden and continuous shutdown of the liquid cooling module 1. Therefore, the actual liquid supply temperature fluctuation can be more smoothly reduced, and the liquid cooling effect can be improved.

[0121] When the actual liquid supply temperature T g is in the sub-interval (-∞, T s -ΔT c3 ], that is, when Tg ≤T s -ΔT c3 , it indicates that the actual supply liquid temperature is too low and deviates greatly from the target supply liquid temperature, the situation is relatively urgent, and the number of opened liquid cooling modules 1 needs to be reduced as soon as possible. In this case, the liquid cooling module 1 is not closed at an interval shutdown time interval, but is closed urgently. For example, when two liquid cooling modules 1 are closed in sequence, the interval shutdown time interval is no longer used, but one is closed immediately after the other is closed. In this way, the corresponding urgent situation can be responded to better, and the actual supply liquid temperature can be adjusted to the vicinity of the target supply liquid temperature more quickly.

[0122] It can be seen that by further subdividing the third interval (-∞, T s -ΔT c2 ) into two sub-temperature intervals with greater and smaller deviations from the target supply liquid temperature, and using interval shutdown and urgent shutdown for the two sub-temperature intervals with greater and smaller deviations respectively to reduce the number of opened liquid cooling modules 1, the actual demand can be better met. Under the condition of effectively considering the smoothness of the whole machine operation and the urgency of the supply liquid temperature rise, the supply liquid temperature can be effectively adjusted, the stability of the supply liquid temperature can be improved, and the liquid cooling effect can be improved.

[0123] In addition, when the actual supply liquid temperature T g is in the first interval (T s +ΔT c1 , +∞), that is, when T g >T s +ΔT c1 , it indicates that the actual supply liquid temperature is too high and cannot meet the cooling demand of the heat load. In this case, it may be necessary to open the non-operating liquid cooling module 1 to increase the number of opened liquid cooling modules 1 to improve the refrigeration capacity of the liquid cooling unit and reduce the actual supply liquid temperature, thereby narrowing the deviation between the actual supply liquid temperature and the target supply liquid temperature and gradually reducing the actual supply liquid temperature to the vicinity of the target supply liquid temperature. However, considering that the refrigeration capacity of the liquid cooling unit 100 will gradually increase after opening one liquid cooling module 1, and the performance increase amplitude is unstable, the temperature drop rate (the change value of the supply liquid temperature per unit time within a time t) can reflect the improvement of the refrigeration capacity. Therefore, under the condition of T g ≥T s +ΔT c , the number of opened liquid cooling modules 1 is not directly increased without considering the situation, but the size relationship between the actual temperature drop rate ΔT and the preset temperature drop rate ΔT t1 is further considered, and the number of opened liquid cooling modules 1 is controlled according to the size relationship between the actual temperature drop rate and the preset temperature drop rate ΔT t1 . In this way, the supply liquid temperature can be adjusted more accurately, the stability of the supply liquid temperature can be improved more effectively, and the liquid cooling effect can be improved.

[0124] Specifically, referring to Figure 8 , in some embodiments, when T g > T s + ΔT c1 , according to the size relationship between the actual temperature drop rate ΔT and the preset temperature drop rate ΔT t1 , the number of open liquid cooling modules 1 is controlled as follows:

[0125] When T g > T s + ΔT c , according to whether the actual temperature drop rate ΔT is less than or equal to the preset temperature drop rate ΔT t1 , it is determined whether to increase the number of open liquid cooling modules 1;

[0126] When T s + ΔT c1 < T g < T s + ΔT c , according to whether the actual temperature drop rate ΔT is greater than the preset temperature drop rate ΔT t1 , it is determined whether to reduce the number of open liquid cooling modules 1.

[0127] Wherein, ΔT c is another preset deviation value, which is greater than ΔT c1 , that is, ΔT c > ΔT c1 .

[0128] The above scheme further subdivides the first temperature interval (T s + ΔT c1 , +∞), specifically, taking T s + ΔT c as the dividing point, the first interval (T s + ΔT c1 , +∞) is subdivided into two sub-temperature intervals with smaller deviation from the target liquid supply temperature (T s + ΔT c1 , T s + ΔT c ) and larger deviation from the target liquid supply temperature [T s + ΔT c , +∞), and for the two sub-temperature intervals, different ways are taken to control the number of open liquid cooling modules 1 according to whether the actual temperature drop rate ΔT is greater than the preset temperature drop rate ΔT t1 .

[0129] Wherein, when the actual liquid supply temperature T g is in [T s + ΔT c, +∞), i.e., when T g ≥ T s + ΔT c , it indicates that the actual supply liquid temperature is too high and deviates greatly from the target supply liquid temperature. In this case, whether to increase the number of opened liquid cooling modules 1 is determined according to whether the actual temperature drop rate ΔT is less than or equal to the preset temperature drop rate ΔT t1 , so that the number of opened liquid cooling modules 1 in the corresponding case can be more in line with the actual demand, and the supply liquid temperature in the corresponding case can be more accurately adjusted, and the liquid cooling effect can be more effectively improved.

[0130] For example, when T g ≥ T s + ΔT c , and ΔT > ΔT t1 , it indicates that the actual supply liquid temperature is high, but the change rate of the actual supply liquid temperature is high. In this case, the refrigeration capacity of the liquid cooling unit 100 can meet the requirements, and the actual supply liquid temperature can be quickly reduced to the vicinity of the target supply liquid temperature even without increasing the number of opened liquid cooling modules 1. Therefore, in the corresponding case, the number of opened liquid cooling modules 1 does not need to be increased, but only needs to be maintained unchanged.

[0131] For another example, when T g ≥ T s + ΔT c , and ΔT ≤ ΔT t1 , it indicates that the actual supply liquid temperature is too high, and the change rate of the actual supply liquid temperature is low. In this case, the refrigeration capacity of the liquid cooling unit 100 is low, and the actual supply liquid temperature will be difficult to reduce to the vicinity of the target supply liquid temperature if the number of opened liquid cooling modules 1 is not increased. Therefore, in the corresponding case, as long as the liquid cooling modules 1 are not all opened, the liquid cooling modules 1 are increased to reduce the actual supply liquid temperature, reduce the deviation between the actual supply liquid temperature and the target supply liquid temperature, gradually reduce the actual supply liquid temperature to be consistent with the target supply liquid temperature, improve the stability of the actual supply liquid temperature, and improve the liquid cooling effect. It is not difficult to understand that the meaning of “as long as the liquid cooling modules 1 are not all opened, the liquid cooling modules 1 are increased” is that the liquid cooling modules 1 are increased and the number of opened liquid cooling modules 1 is increased only in the case that T g ≥ T s + ΔT c , ΔT ≤ ΔT t1 , and the liquid cooling modules 1 are not all opened, while the number of opened liquid cooling modules 1 is maintained unchanged in the case that T g ≥ T s + ΔT c , ΔT ≤ ΔT t1 , and the liquid cooling modules 1 are all opened.

[0132] As can be seen, in the case that T g ≥ Ts + ΔT c , the actual temperature drop rate ΔT is less than or equal to the preset temperature drop rate ΔT t1 , it is determined whether to increase the number of start-ups of the liquid cooling module 1, and the start-up and shutdown of the liquid cooling module 1 is controlled accordingly. In the case of ΔT > ΔT t1 , the number of start-ups of the liquid cooling module 1 is not increased, and in the case of ΔT ≤ ΔT t1 , the number of start-ups of the liquid cooling module 1 is increased. This can more accurately adjust the liquid supply temperature and more effectively improve the stability of the liquid supply temperature and improve the liquid cooling effect.

[0133] In addition, when the actual liquid supply temperature T g is in the sub-temperature interval (T s + ΔT c1 , T s + ΔT c ), that is, when T s + ΔT c1 < T g < T s + ΔT c , it indicates that the actual liquid supply temperature is high, but the deviation from the target liquid supply temperature is small. In this case, according to whether the actual temperature drop rate ΔT is greater than the preset temperature drop rate ΔT t1 , it is determined whether to reduce the number of start-ups of the liquid cooling module 1. This can make the number of start-ups of the liquid cooling module 1 in the corresponding case more in line with the actual demand, and more accurately adjust the liquid supply temperature in the corresponding case and more effectively improve the liquid cooling effect.

[0134] For example, when T s + ΔT c1 < T g < T s + ΔT c , and ΔT > ΔT t1 , it indicates that the actual liquid supply temperature is high, but the deviation from the target liquid supply temperature is small, and the change rate of the actual liquid supply temperature is high. In this case, the refrigeration capacity of the liquid cooling unit 100 is high, and if the number of start-ups of the liquid cooling module 1 is not reduced, the actual liquid supply temperature will soon be reduced to be much lower than the target liquid supply temperature. Therefore, in the corresponding case, the number of start-ups of the liquid cooling module 1 is reduced, that is, in the case of T s + ΔT c1 < T g < T s + ΔT c , and ΔT > ΔT t1 , reducing the number of start-ups of the liquid cooling module 1 is more conducive to reducing the actual liquid supply temperature to the vicinity of the target liquid supply temperature, improving the stability of the liquid supply temperature, and improving the liquid cooling effect.

[0135] For example, when T s +ΔT c1 <T g <T s +ΔT c And ΔT≤ΔT t1 If the actual liquid supply temperature is too high, but the deviation from the target liquid supply temperature is small, and the rate of change of the actual liquid supply temperature is small, then the actual liquid supply temperature will not drop too quickly below the target liquid supply temperature. Therefore, the number of liquid cooling modules 1 that are turned on can be kept as is to more accurately adjust the actual liquid supply temperature and improve the liquid cooling effect.

[0136] Exemplarily, in some embodiments, in T s +ΔT c1 <T g <T s +ΔT c And ΔT≤ΔT t1 In the case where the number of activated liquid cooling modules 1 is not reduced, at least one of the following is true:

[0137] In T s +ΔT c1 <T g <T s +ΔT c And k*ΔT t1 ≤ΔT≤ΔT t1 In this case, the number of liquid cooling modules 1 that are turned on remains unchanged;

[0138] In T s +ΔT c1 <T g <T s +ΔT c And ΔT <k*ΔT t1 In this case, increase the number of liquid cooling modules 1 that are activated.

[0139] The above scheme uses k*ΔT t1 As the dividing point, T s +ΔT c1 <T g <T s +ΔT c The temperature drop rate range under the condition (-∞, ΔT) t1 It is further subdivided into two sub-rate intervals, namely the sub-rate interval [k*ΔT]. t1 ΔT t1 and the sub-rate interval (-∞, k*ΔT) t1 Furthermore, different methods are adopted for the two sub-rate ranges to control the start and stop of the liquid cooling module 1. This can better meet the actual needs, more effectively adjust the liquid supply temperature, and improve the liquid cooling effect.

[0140] Among them, when T s +ΔT c1 <T g <T s +ΔT c And k*ΔT t1 ≤ΔT≤ΔT t1 If the actual liquid supply temperature is slightly high, but the rate of change of the actual liquid supply temperature is appropriate, then the cooling capacity of the liquid cooling unit 100 can meet the requirements. The liquid cooling unit 100 can reduce the actual liquid supply temperature to the same as the target liquid supply temperature based on the existing liquid cooling modules 1 that have been turned on. Therefore, under the corresponding circumstances, maintaining the number of liquid cooling modules 1 that are turned on can effectively adjust the liquid supply temperature and improve the liquid cooling effect.

[0141] And when T s +ΔT c1 <T g <T s +ΔT c And ΔT <k*ΔT t1 If the actual liquid supply temperature is slightly high, and the rate of change of the actual liquid supply temperature is low, the cooling capacity of the liquid cooling unit 100 is low, and it is difficult to reduce the actual liquid supply temperature to the same as the target liquid supply temperature based on the existing liquid cooling module 1 that has been turned on. Therefore, in the corresponding case, adding liquid cooling module 1 and increasing the number of liquid cooling modules 1 that are turned on can effectively regulate the liquid supply temperature and improve the liquid cooling effect.

[0142] The above solution is for T s +ΔT c1 <T g <T s +ΔT c In this case, the rate of temperature drop is divided into more detailed ranges, not just like T. g ≥T s +ΔT c As in the previous case, the rate of temperature drop is divided into those greater than or equal to ΔT. t1 Two intervals, and further, less than or equal to ΔT. t1 The interval is divided into [k*ΔT] t1 ΔT t1 ] and (-∞, k*ΔT t1 The two intervals divide the temperature drop rate into (-∞, k*ΔT) regions. t1 ), [k*ΔT t1 ΔT t1 ] and (ΔT t1three intervals, so as to be more in line with the characteristics that the actual supply liquid temperature is less different from the target supply liquid temperature, and more accurately control the start-stop number of the liquid cooling module 1 in the case that the actual supply liquid temperature is less different from the target supply liquid temperature, more effectively adjust the supply liquid temperature, and improve the liquid cooling effect.

[0143] wherein k is a preset coefficient, greater than 0 and less than 1, that is, 0 < k < 1. For example, in some embodiments, 0.1 ≤ k ≤ 0.9, and specifically, in some embodiments, 0.1 ≤ k ≤ 0.4. At this time, the size of k is more appropriate, and the divided temperature drop rate intervals are more reasonable, so that the start-stop number of the liquid cooling module 1 can be more accurately controlled, the supply liquid temperature can be more effectively adjusted, and the liquid cooling effect can be improved.

[0144] In the foregoing embodiments, in the process of increasing the number of started liquid cooling modules 1, the liquid cooling modules 1 can be started in order from short to long cumulative running time, that is, the liquid cooling module 1 with shorter cumulative running time is started first, and the liquid cooling module 1 with longer cumulative running time is started later.

[0145] wherein the cumulative running time refers to the total running time of the liquid cooling module 1 from the first start of the liquid cooling unit 100 to the current working process. When the liquid cooling unit 100 is started for the first time, each liquid cooling module 1 has not run, and the cumulative running time is 0. After the liquid cooling module 1 runs, the cumulative running time is no longer 0, but the sum of the running time up to the current time.

[0146] In the process of increasing the number of started liquid cooling modules 1, the liquid cooling modules 1 are started in order from short to long cumulative running time, on the one hand, since the liquid cooling modules 1 are started one by one rather than simultaneously, the excessively large starting current can be prevented, and the safety of the whole machine operation can be improved; on the other hand, since the liquid cooling module 1 with shorter cumulative running time is started first and the liquid cooling module 1 with longer cumulative running time is started later, the running time of each liquid cooling module 1 can be balanced as much as possible, and the performance of the liquid cooling module 1 can be prevented from being degraded or even damaged due to the excessively long running time, so as to improve the structural reliability of the liquid cooling unit 100 and prolong the service life of the liquid cooling unit 100.

[0147] In addition, in the process of increasing the number of started liquid cooling modules 1, the liquid cooling modules 1 can be started according to the starting time interval. In this way, the starting number of the liquid cooling module 1 can be more accurately and reliably controlled, which is more suitable for the characteristics that the refrigeration capacity of the liquid cooling unit 100 needs time to improve after the liquid cooling module 1 is started. Because after the liquid cooling module 1 is started, the refrigeration capacity of the liquid cooling unit 100 gradually improves for a period of time, the parameters (such as the supply liquid temperature and the temperature drop rate) detected during the unstable heat exchange capacity period of the liquid cooling module 1 in the early stage of starting have poor reference value, and the performance data detected after a certain interval of time are relatively stable, so that it is more accurate and reliable to determine whether the next liquid cooling module 1 needs to be started after a certain interval of time.

[0148] Wherein, the start time interval can be greater than t, so that the temperature drop rate detection has been completed before starting the next liquid cooling module 1, and whether to increase the liquid cooling module 1 can be controlled according to the corresponding detected temperature drop rate. The start time interval under different conditions can be equal or unequal. For example, in some embodiments, T g ≥T s +ΔT c And ΔT t ≤ΔT t1 In the case, and T s +ΔT c >T g >T s +ΔT c1 And ΔT t <0.4ΔT t1 In the case, the liquid cooling module 1 is started, the number of liquid cooling module 1 is increased, and the start time interval of two liquid cooling modules 1 is t1 and t2, respectively, wherein t1 and t2 can be equal or unequal.

[0149] In addition, in the process of reducing the number of liquid cooling modules 1 in each of the foregoing embodiments, the liquid cooling modules 1 can be closed in turn according to the order of cumulative running time from long to short, that is, the one with longer cumulative running time is closed first, and the one with shorter cumulative running time is closed later. In this way, on the one hand, since it is closed one by one rather than simultaneously closing multiple ones, the current change can be prevented, and the safety of the whole machine operation can be improved. On the other hand, since the one with longer cumulative running time is closed first and the one with shorter cumulative running time is closed later, the running time of each liquid cooling module 1 can be balanced as much as possible, and the performance of some liquid cooling modules 1 can be prevented from being degraded or even damaged due to too long running time, thus the structural reliability of the liquid cooling unit 100 can be improved, and the service life of the liquid cooling unit 100 can be prolonged.

[0150] In addition, in each of the foregoing embodiments, in addition to the case of emergency closing of the liquid cooling module 1 mentioned above, in the process of reducing the number of liquid cooling modules 1, the liquid cooling modules 1 can be closed according to the shutdown time interval to provide a certain buffer time for the liquid cooling module 1 to be closed before it is closed, so that the shutdown process of the liquid cooling module 1 is more safe and stable, and the stability of the whole machine operation is enhanced.

[0151] Wherein, the start time interval can be greater than t, so that the temperature drop rate detection has been completed before starting the next liquid cooling module 1, and whether to increase the liquid cooling module 1 can be controlled according to the corresponding detected temperature drop rate. The start time interval under different conditions can be equal or unequal. For example, in some embodiments, T s -ΔT c3 <T g <T s -ΔTc2 The shutdown time interval under the condition, and T s +ΔT c1 <T g <T s +ΔT c And ΔT>ΔT t1 The shutdown time intervals can be equal or unequal under different circumstances. Furthermore, the shutdown time interval and the startup time interval can be equal or unequal.

[0152] The method of considering the temperature drop rate during the shutdown of liquid cooling module 1 described above is more suitable for T. g >T s +ΔT c1 The process of reducing the number of liquid cooling modules 1 that are activated under certain circumstances, while in T g <T s -ΔT c2 In this case, when reducing the number of liquid cooling modules 1 that are turned on, the rate of temperature drop does not need to be considered. This is because, unlike the case where the cooling capacity of liquid cooling modules 1 gradually increases after they are turned on, the corresponding cooling capacity of liquid cooling modules 1 drops directly to 0 after they are turned off, and the performance drop is relatively stable. Therefore, in this case, the rate of temperature drop does not need to be considered, so as to simplify the control process.

[0153] Furthermore, when performing the aforementioned step of sequentially controlling the start or stop of liquid cooling modules 1 according to their cumulative running time, if there are liquid cooling modules 1 with the same cumulative running time, they can be started sequentially according to their numerical designations. For example, they can be started in ascending order of their numerical designations; that is, the liquid cooling modules with smaller numerical designations can be started first, followed by the ones with larger numerical designations. The corresponding numerical designations can be pre-assigned, for example... Figure 1 In this configuration, each liquid cooling module 1 is sequentially labeled as 1#, 2#, ..., n#. When shutting down liquid cooling module 1, if the cumulative running time of liquid cooling modules 1# and 2# is the same, then liquid cooling module 1# can be started first, followed by liquid cooling module 2#. Conversely, when shutting down liquid cooling module 1, if the cumulative running time of liquid cooling modules 1# and 2# is the same, then liquid cooling module 1# can be shut down first, followed by liquid cooling module 2#. This allows for a more orderly start-up and shutdown of each liquid cooling module 1, reducing the likelihood of errors.

[0154] Next Figure 8 The control method shown will be further explained.

[0155] like Figure 8 As shown, in this embodiment, some parameters are preset, including the target liquid supply temperature T. s Preset temperature deviation value ΔT c ΔT c1 ΔT c2 and ΔTc3 , preset temperature drop rate ΔT t1 , and time intervals t, t1 and t2.

[0156] After the liquid cooling unit 100 is started, the liquid cooling module 1 is started in response to a start-up instruction, and during the starting of the liquid cooling module 1, the actual liquid supply temperature T g is detected in real time, and the actual temperature drop rate ΔT is calculated according to the actual liquid supply temperatures T1 and T2 within the time t according to the formula ΔT = |T2-T1| / t, and the start-stop number of the liquid cooling module 1 is controlled according to the detected actual liquid supply temperature T g and the actual temperature drop rate ΔT according to the method shown in Table 1.

[0157] Table 1 correspondence table

[0158]

[0159]

[0160] The method shown in Table 1 above divides the actual liquid supply temperature into five different temperature intervals, and in some intervals, the start-stop of the liquid cooling module 1 is controlled according to the size of the actual temperature drop rate ΔT, which is explained in detail as follows.

[0161] (1) T g ≥ T s + ΔT c , the actual liquid supply temperature is high and the deviation from the target liquid supply temperature T s is large, and the number of liquid cooling modules to be started needs to be increased to improve the refrigeration capacity of the cooling unit. Since the refrigeration capacity gradually increases after the liquid cooling module is started, the start-stop of the liquid cooling module is further accurately controlled according to the following a) and b) two ways in combination with the actual temperature drop rate ΔT:

[0162] a) if ΔT t ≤ ΔT t1 , the actual liquid supply temperature is too high and the refrigeration capacity is too low, the liquid cooling module 1 is started in sequence according to the time interval t1, and when the liquid cooling module 1 has reached the maximum start number, the maximum start number is maintained;

[0163] b) if ΔTt > ΔTt1, the actual liquid supply temperature is too high but the refrigeration capacity meets the requirements, and the number of liquid cooling modules that have been started is kept unchanged.

[0164] (2) T s + ΔT c1 < T g < T s + ΔT cAt that time, the actual liquid supply temperature is high and the deviation from the target temperature is small. Since the cooling capacity of the liquid cooling module gradually increases after it is turned on, the performance increase is unstable. Therefore, based on the actual temperature drop rate ΔT, the number of liquid cooling modules 1 that are turned on is controlled according to the following three methods (a), b), and c) to adjust the cooling capacity of the liquid cooling unit 100:

[0165] a) If ΔT t >ΔT t1 The actual liquid supply temperature is high and the cooling capacity is large. Liquid cooling module 1 is turned off sequentially according to time interval t2.

[0166] b) If 0.4ΔT t1 ≤ΔT t ≤ΔT t1 The actual liquid supply temperature is high and the cooling capacity meets the requirements, so the number of liquid cooling modules that have been turned on remains unchanged.

[0167] c) If ΔT t <0.4ΔT t1 The actual liquid supply temperature is high and the cooling capacity is insufficient. Liquid cooling module 1 is turned on sequentially according to time interval t2.

[0168] (3) When T s +ΔT c1 ≥T g ≥T s -ΔT c2 When the actual liquid supply temperature deviates from the target liquid supply temperature within the allowable range, the current operating status of the liquid cooler unit is maintained, the number of liquid cooling modules 1 that are turned on is not increased or decreased, and the actual temperature drop rate is not judged.

[0169] (4) When T s -ΔT c2 >T g >T s -ΔT c3 When the actual liquid supply temperature is low and the deviation from the target temperature is small, it is necessary to reduce the number of liquid cooling modules that are turned on to reduce the cooling capacity of the liquid cooling unit. Since the corresponding cooling capacity is reduced to zero directly after the liquid cooling module is turned off, the performance drop is relatively stable, and the actual temperature drop rate is not judged.

[0170] (5)T s -ΔT c3 ≥T g If the actual liquid supply temperature is too low and deviates significantly from the target temperature, each liquid cooling module will shut down in sequence without determining the actual temperature drop rate.

[0171] exist Figure 8In the above method, the conditions (1) to (5) are sequentially judged after the start-up, because after the start-up, the cooling liquid has not yet participated in the circulation and has not yet been cooled, so the supply liquid temperature is relatively high, and condition (1) is generally met first, and then as the operation continues, the supply liquid temperature gradually decreases, so conditions (2) to (5) are sequentially judged. However, it should be noted that conditions (1) to (5) are not necessarily sequentially judged, but the order can also change.

[0172] In the above method, the number of start-ups and stoppages of the liquid cooling module 1 is controlled to adjust the actual supply liquid temperature, and the actual supply liquid temperature and the actual temperature drop rate are comprehensively evaluated to evaluate the refrigeration capacity of the liquid cooling unit 100. In the start-up and stoppage judgment condition of the liquid cooling module 1, the interval in which the actual supply liquid temperature is located is first judged, and then the actual supply liquid temperature in different intervals is further judged to determine whether the actual temperature drop rate needs to be considered and how to consider the actual temperature drop rate, so that the number of start-ups and stoppages of the liquid cooling module can be controlled more in line with the actual demand, the random changes of the heat load can be more timely responded, the supply liquid temperature can be more accurately adjusted, and the constant-temperature cooling liquid can be continuously and stably output, so that the liquid cooling effect can be improved.

[0173] The control method of each of the above embodiments can be performed under the control of a controller. Therefore, the application also provides a controller, and the corresponding controller includes a memory and a processor coupled to the memory. The processor is configured to execute the control method of any embodiment based on the instructions stored in the memory.

[0174] In addition, the application also provides a computer readable storage medium and a computer program product. The computer readable storage medium stores computer instructions, and the computer instructions are executed by the processor to perform the control method of any embodiment. The computer program product includes a computer program, and the computer program is executed by the processor to implement the control method of any embodiment.

[0175] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the application and not to limit them; although the application has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the specific embodiments of the application can be modified or some technical features can be replaced by equivalent ones, which should be covered in the technical solution range claimed by the application.

Claims

1. A control method for a liquid-cooled chiller unit (100), characterized in that, include: During the operation of the liquid cooling unit (100) including multiple liquid cooling modules (1), the actual liquid supply temperature T of the liquid cooling unit (100) is detected. g ; Based on the actual liquid supply temperature T g With the target supply temperature T s The size relationship between them controls the number of liquid cooling modules (1) that are turned on.

2. The control method according to claim 1, characterized in that, Based on the actual liquid supply temperature T g With the target supply temperature T s The size relationship between them, controlling the number of liquid cooling modules (1) to be activated includes at least one of the following: In T g >T s +ΔT c1 In the case of actual temperature drop rate ΔT and preset temperature drop rate ΔT t1 The size relationship between them controls the number of liquid cooling modules (1) that are turned on; In T s -ΔT c2 ≤T g ≤T s +ΔT c1 In this case, the number of liquid cooling modules (1) that are turned on remains unchanged; In T g <T s -ΔT c2 In this case, reduce the number of liquid cooling modules (1) that are turned on; Where, ΔT c1 and ΔT c2 All values ​​are greater than 0, and the actual temperature drop rate ΔT is the actual supply liquid temperature T. g The change per unit time within time t.

3. The control method according to claim 2, characterized in that, In T g >T s +ΔT c1 In the case of actual temperature drop rate ΔT and preset temperature drop rate ΔT t1 The size relationship between them, controlling the number of liquid cooling modules (1) to be activated includes at least one of the following: In T g ≥T s +ΔT c In the case where the actual temperature drop rate ΔT is less than or equal to the preset temperature drop rate ΔT, the following applies: t1 Determine whether to increase the number of liquid cooling modules (1) that are turned on; In T s +ΔT c1 <T g <T s +ΔT c In the case of whether the actual temperature drop rate ΔT is greater than the preset temperature drop rate ΔT t1 Determine whether to reduce the number of liquid cooling modules (1) that are turned on; Where, ΔT c >ΔT c1 .

4. The control method according to claim 3, characterized in that, In T g ≥T s +ΔT c In the case where the actual temperature drop rate ΔT is less than or equal to the preset temperature drop rate ΔT, the following applies: t1 Determining whether to increase the number of activated liquid cooling modules (1) includes at least one of the following: In T g ≥T s +ΔT c And ΔT>ΔT t1 In this case, the number of liquid cooling modules (1) that are turned on remains unchanged; In T g ≥T s +ΔT c ΔT≤ΔT t1 If not all of the liquid cooling modules (1) are turned on, increase the number of liquid cooling modules (1) that are turned on. In T g ≥T s +ΔT c ΔT≤ΔT t1 And when all the liquid cooling modules (1) are turned on, the number of liquid cooling modules (1) turned on remains unchanged.

5. The control method according to claim 3, characterized in that, In T s +ΔT c1 <T g <T s +ΔT c In the case of whether the actual temperature drop rate ΔT is greater than the preset temperature drop rate ΔT t1 Determining whether to reduce the number of activated liquid cooling modules (1) includes at least one of the following: In T s +ΔT c1 <T g <T s +ΔT c And ΔT>ΔT t1 In this case, reduce the number of liquid cooling modules (1) that are turned on; In T s +ΔT c1 <T g <T s +ΔT c And ΔT≤ΔT t1 In this case, the number of liquid cooling modules (1) turned on will not be reduced.

6. The control method according to claim 5, characterized in that, In T s +ΔT c1 <T g <T s +ΔT c And ΔT≤ΔT t1 In the absence of reducing the number of liquid cooling modules (1) in operation, at least one of the following is true: In T s +ΔT c1 <T g <T s +ΔT c And k*ΔT t1 ≤ΔT≤ΔT t1 In this case, the number of liquid cooling modules (1) that are turned on remains unchanged; In T s +ΔT c1 <T g <T s +ΔT c And ΔT <k*ΔT t1 In this case, increase the number of liquid cooling modules (1) that are turned on; Among them, 0 <k<1。 7. The control method according to claim 6, characterized in that, 0.1≤k≤0.9。 8. The control method according to claim 7, characterized in that, 0.1≤k≤0.4。 9. The control method according to any one of claims 3-8, characterized in that, The control method is configured to be at least one of the following: In the process of increasing the number of liquid cooling modules (1) turned on, the liquid cooling modules (1) are turned on in sequence according to the cumulative running time from shortest to longest. In the process of increasing the number of liquid cooling modules (1) that are turned on, the liquid cooling modules (1) are turned on according to the time interval between turns on; In the process of reducing the number of liquid cooling modules (1) turned on, the liquid cooling modules (1) are turned off in sequence according to the order of cumulative running time from longest to shortest. In the process of reducing the number of liquid cooling modules (1) turned on, the liquid cooling modules (1) are turned off according to the shutdown time interval.

10. The control method according to claim 9, characterized in that, The start-up time interval and / or shutdown time interval are greater than t.

11. The control method according to any one of claims 2-8, characterized in that, In T g <T s -ΔT c2 In this case, reducing the number of activated liquid cooling modules (1) includes at least one of the following: In T s -ΔT c3 <T g <T s -ΔT c2 In this case, the liquid cooling module (1) is turned off according to the shutdown time interval to reduce the number of liquid cooling modules (1) turned on; In T g ≤T s -ΔT c3 In the event of an emergency, the liquid cooling module (1) is shut down to reduce the number of liquid cooling modules (1) that are turned on. Where, ΔT c3 >ΔT c2 .

12. A controller, characterized in that, The system includes a memory and a processor coupled to the memory, the processor being configured to execute the control method as described in any one of claims 1-11 based on instructions stored in the memory.

13. A liquid-cooled unit (100), comprising a plurality of liquid-cooled modules (1), characterized in that, It also includes the controller as described in claim 12.

14. The liquid-cooled unit (100) according to claim 13, characterized in that, The fan (8) of the liquid cooling module (1) is located on the side of the housing (2) for side air outlet; and / or, the liquid cooling module (1) includes a plurality of condensers (4) connected in parallel.

15. The liquid-cooled unit (100) according to claim 14, characterized in that, The plurality of condensers (4) are arranged on opposite sides of the central axis of the fan (8) located on the side of the housing (2); and / or the heat exchange areas of the plurality of condensers (4) are not equal.

16. The liquid-cooled unit (100) according to claim 15, characterized in that, The plurality of condensers (4) includes a first condenser (41) and a second condenser (42), the first condenser (41) and the second condenser (42) being located on opposite sides of the central axis of the fan (8), and respectively in an L-shape and a straight line shape.

17. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores computer instructions that are executed by a processor using the control method as described in any one of claims 1-11.

18. A computer program product comprising a computer program that, when executed by a processor, implements the control method as described in any one of claims 1-11.

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