Method, device, water cooling unit and storage medium for controlling water cooling unit

Abstract

The present application relates to the field of refrigeration technology, and discloses a method for controlling a water cooling unit, the method comprising: obtaining the current outlet water temperature when the water cooling unit starts to start; calculating the first temperature difference between the current outlet water temperature and the preset temperature; and controlling the refrigeration capacity of the compressor according to the change trend of the first temperature difference. In this way, the refrigeration capacity of the compressor matches the first temperature difference, so that the outlet water temperature is close to or even maintained at the preset temperature. Thereby reducing the deviation of the outlet water temperature of the water cooling unit to ensure the efficient operation of the energy storage system. The present application also discloses a device for controlling a water cooling unit, a water cooling unit, and a storage medium.

Description

Technical Field

[0001] The present application relates to the field of refrigeration technology, for example, to a method, a device, a water cooling unit and a storage medium for controlling a water cooling unit. Background Art

[0002] Battery energy storage systems are often integrated with water-cooled cooling units to ensure uniform heat generation and temperature distribution of the internal batteries. Usually, the outlet water temperature of the water-cooled unit is controlled by on-off control, that is, after reaching the outlet water temperature, the compressor output is stabilized. When the outlet water temperature is higher than the set temperature, the compressor output power is increased. When this method is used, the compressor will switch back and forth between high and low loads or even start and stop, which results in high power consumption and greatly reduced service life.

[0003] The related art discloses a control method for an efficient and stable magnetic suspension chiller, comprising the following steps: setting a target temperature T 1 , Start temperature difference △ 1 and shutdown temperature difference△ 1 , the water temperature acquisition module obtains the actual outlet water temperature T 1 ; Calculate the actual outlet water temperature T 1 and target temperature T 1 The difference of 3 and the starting temperature difference △ 1 Compare; When T 1 >T 1 And 1 >△ 3 When T 1 >T 1 And 3 >△ 1 , increase the number of compressors turned on; when T 1 ≤T 1 And T 1 -T 1 <△ 1 When T 1 -T 1 >△ 1 , reduce the number of compressors turned on.

[0004] In the process of implementing the embodiments of the present disclosure, it is found that there are at least the following problems in the related art:

[0005] The relevant technology can reduce the frequency of compressor start and stop, but it cannot control the outlet water temperature to be constant, thus affecting the efficient operation of the energy storage system. Summary of the invention

[0006] In order to provide a basic understanding of some aspects of the disclosed embodiments, a brief summary is given below. The summary is not an extensive review, nor is it intended to identify key / critical components or delineate the scope of protection of these embodiments, but rather serves as a prelude to the detailed description that follows.

[0007] The embodiments of the present disclosure provide a method, an apparatus, a water cooling unit and a storage medium for controlling a water cooling unit, so as to reduce the deviation of the outlet water temperature of the water cooling unit.

[0008] In some embodiments, the method includes: obtaining the current water outlet temperature when the water cooling unit starts to start; calculating the first temperature difference between the current water outlet temperature and the preset temperature; and controlling the refrigeration capacity of the compressor according to the changing trend of the first temperature difference.

[0009] In some embodiments, the device includes: a processor and a memory storing program instructions, and the processor is configured to execute the aforementioned method for controlling a water cooling unit when running the program instructions.

[0010] In some embodiments, the air conditioner includes the device for controlling the water cooling unit as described above.

[0011] In some embodiments, the storage medium stores program instructions, and when the program instructions are run, the aforementioned method for controlling a water cooling unit is executed.

[0012] The method, device, water cooling unit and storage medium for controlling a water cooling unit provided by the embodiments of the present disclosure can achieve the following technical effects:

[0013] When the water cooling unit starts running, the outlet water temperature is monitored in real time. The first temperature difference between the current outlet water temperature and the preset temperature is calculated. Then, based on the change trend of the first temperature difference value, the refrigeration capacity output by the compressor is controlled. In this way, the refrigeration capacity of the compressor matches the first temperature difference, so that the outlet water temperature is close to or even maintained at the preset temperature. This reduces the deviation of the outlet water temperature of the water cooling unit to ensure the high-efficiency operation of the energy storage system.

[0014] The above general description and the following description are exemplary and explanatory only and are not intended to limit the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] One or more embodiments are exemplarily described by corresponding drawings, which do not limit the embodiments. Elements with the same reference numerals in the drawings are shown as similar elements, and the drawings do not constitute a scale limitation, and wherein:

[0016] Figure 1 is a schematic diagram of a method for controlling a water cooling unit provided by an embodiment of the present disclosure;

[0017] Figure 2 is a schematic diagram of another method for controlling a water cooling unit provided by an embodiment of the present disclosure;

[0018] Figure 3 is a schematic diagram of another method for controlling a water cooling unit provided by an embodiment of the present disclosure;

[0019] Figure 4 is a schematic diagram of another method for controlling a water cooling unit provided by an embodiment of the present disclosure;

[0020] Figure 5 is a schematic diagram of another method for controlling a water cooling unit provided by an embodiment of the present disclosure;

[0021] Figure 6 is a schematic diagram of a device for controlling a water cooling unit provided by an embodiment of the present disclosure;

[0022] Figure 7 It is a schematic diagram of another device for controlling a water cooling unit provided in an embodiment of the present disclosure. DETAILED DESCRIPTION

[0023] In order to be able to understand the features and technical contents of the embodiments of the present disclosure in more detail, the implementation of the embodiments of the present disclosure is described in detail below in conjunction with the accompanying drawings. The attached drawings are for reference only and are not used to limit the embodiments of the present disclosure. In the following technical description, for the convenience of explanation, a full understanding of the disclosed embodiments is provided through multiple details. However, one or more embodiments can still be implemented without these details. In other cases, to simplify the drawings, well-known structures and devices can be simplified for display.

[0024] The terms "first", "second", etc. in the specification and claims of the embodiments of the present disclosure and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the terms used in this way can be interchanged where appropriate, so that the embodiments of the embodiments of the present disclosure described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions.

[0025] Unless otherwise stated, the term "plurality" means two or more.

[0026] In the embodiment of the present disclosure, the character " / " indicates that the preceding and following objects are in an "or" relationship. For example, A / B indicates: A or B.

[0027] The term "and / or" is a description of the association relationship between objects, indicating that three relationships can exist. For example, A and / or B means: A or B, or, A and B.

[0028] The term "correspondence" may refer to an association relationship or a binding relationship. The correspondence between A and B means that there is an association relationship or a binding relationship between A and B.

[0029] When the water-cooled unit uses the compressor refrigerant to operate in the cooling mode, the refrigerant at a lower temperature exchanges heat with water in the heat exchanger, so that the outlet water temperature is lower. After the low-temperature outlet water enters the energy storage system, it exchanges heat with the energy storage system. After the water temperature rises, it enters the water-cooled unit for circulation. In this process, how to use appropriate control and adjustment methods to make the compressor output appropriate cooling capacity and ensure that the outlet water temperature of the water-cooled unit is close to the preset temperature is the key to controlling the water-cooled unit.

[0030] Combination Figure 1 As shown, the embodiment of the present disclosure provides a method for controlling a water cooling unit, comprising:

[0031] S101, when the water cooling unit starts to start, the processor obtains the current outlet water temperature.

[0032] S102, the processor calculates a first temperature difference between the current outlet water temperature and a preset temperature.

[0033] S103: The processor controls the refrigeration capacity of the compressor according to the change trend of the first temperature difference value.

[0034] A first temperature sensor is provided at the water outlet of the water cooling unit. The first temperature sensor is in communication with the processor. When the water cooling unit is started and the compressor is turned on, the real-time water outlet temperature is obtained through the first temperature sensor. A first temperature difference between the current water outlet temperature and the preset temperature is calculated.

[0035] When the compressor starts to run, the first temperature difference between the outlet water temperature and the preset temperature is large. Therefore, it is necessary to control the compressor to output an appropriate cooling capacity. As the system runs, the first temperature difference will become smaller and smaller. When the first temperature difference approaches 0, the cooling capacity of the compressor will be very small. At this time, the cooling capacity output by the compressor will be greatly reduced, and the first temperature difference will gradually increase. This reciprocating process will eventually form a false balance, that is, the outlet water temperature will run stably at a temperature higher than the preset temperature, and will never reach the preset temperature. It can be seen that the changing trend of the first temperature difference can reflect the change in the cooling capacity of the compressor. Therefore, according to the changing trend of the first temperature difference, that is, the increasing trend or decreasing trend, the cooling capacity of the compressor is controlled. The cooling capacity output by the compressor is matched with the changing trend of the first temperature difference.

[0036] In the disclosed embodiment, when the water cooling unit starts to operate, the outlet water temperature is monitored in real time. The first temperature difference between the current outlet water temperature and the preset temperature is calculated. Then, based on the change trend of the first temperature difference value, the refrigeration capacity output by the compressor is controlled. In this way, the refrigeration capacity of the compressor matches the first temperature difference, so that the outlet water temperature is close to or even maintained at the preset temperature. Thereby reducing the deviation of the outlet water temperature of the water cooling unit to ensure the high-efficiency operation of the energy storage system.

[0037] Combination Figure 2 As shown, the embodiment of the present disclosure provides a method for controlling a water cooling unit, comprising:

[0038] S101, when the water cooling unit starts to start, the processor obtains the current outlet water temperature.

[0039] S102, the processor calculates a first temperature difference between the current outlet water temperature and a preset temperature.

[0040] S113: When the first temperature difference value shows a decreasing trend, the processor controls the refrigeration capacity of the compressor according to the first temperature difference value.

[0041] S123: When the changing trend of the first temperature difference value is an increasing trend, the processor controls the cooling capacity of the compressor according to each temperature difference value at a plurality of preset moments and an initial moment.

[0042] When controlling the refrigeration capacity of the compressor system, it is divided into a first control scheme and a second control scheme.

[0043] First control scheme: when the first temperature difference value shows a decreasing trend, it indicates that the outlet water temperature is gradually approaching the preset temperature. At this time, the refrigeration capacity of the compressor is controlled according to the first temperature difference value.

[0044] Second control scheme: When the trend of the first temperature difference value changes from a decreasing trend to an increasing trend, it means that the outlet water temperature changes from being close to the preset temperature to being far away from the preset temperature again. In order to make the outlet water temperature close to or even maintain the preset temperature, the temperature difference between multiple preset moments and the initial moment is calculated at this time. The refrigeration capacity of the compressor is then controlled based on these temperature difference values. In this way, the refrigeration capacity output by the compressor system will not drop significantly, so that the outlet water temperature can quickly reach the preset temperature and maintain dynamic balance.

[0045] According to the variation trend of the first temperature difference, the refrigeration capacity output by the compressor is alternately controlled according to the first control scheme and the second control scheme.

[0046] In this way, the compressor is controlled to output an appropriate cooling capacity, thereby reducing the difference between the outlet water temperature and the preset temperature.

[0047] Optionally, when the processor controls the refrigeration capacity of the compressor according to the first temperature difference value, the refrigeration capacity of the compressor is calculated according to formula (1):

[0048] Q c =K*E n *Q w Formula (1)

[0049] Among them, Q c is the refrigeration capacity of the compressor. K is a constant. The larger K is, the more sensitive the refrigeration capacity of the compressor is. n is the first temperature difference, E n =T n -T 0 , T n is the outlet water temperature corresponding to the current moment, that is, the current outlet water temperature, T 0 Here, E n When substituting into formula (1), only the numerical value is entered without the unit. w The refrigeration capacity of the compressor to maintain steady-state operation of the chiller can be measured before the unit leaves the factory.

[0050] If Q is calculated according to formula (1) c Greater than Q max , then the compressor is controlled to Q max Run. Among them, Q max is the maximum cooling capacity of the compressor.

[0051] Optionally, the processor controls the refrigeration capacity of the compressor according to each temperature difference value between a plurality of preset moments and an initial moment, including:

[0052] The processor calculates the sum of the temperature difference values ​​between the plurality of preset moments and the initial moment.

[0053] The processor controls the refrigeration capacity of the compressor according to the sum of the temperature differences.

[0054] To set multiple preset times: 1 ,t 2 ,…,t n-1 ,t n . Get the outlet water temperature corresponding to these preset times: T 1 , T 2 ,…,T n-1 , T n .

[0055] Calculate the temperature difference between the outlet water temperature at the preset time and the preset temperature: E 1 =T 1 -T 0 、E 2 =T 2-T 0 ,..., E n-1 = T n-1 -T 0 , E n = T n -T 0 .

[0056] Calculate the sum of each temperature difference value: ΣE i = E 1 + E 2 +... + E n-1 + E n .

[0057] Calculate the refrigeration capacity of the compressor according to formula (2):

[0058] Q c = K i * ΣE i * Q w Formula (2)

[0059] Wherein, K i is a constant. The larger K i , the more sensitive the adjustment of the refrigeration capacity of the compressor is.

[0060] Set K i < K. This is because: The first control scheme is the control logic when the outlet water temperature differs greatly from the preset temperature, and the refrigeration capacity needs to be adjusted quickly. The larger K is, the more sensitive the system adjustment is. While the second control scheme is that the outlet water temperature differs little from the preset temperature, that is, the compensation control at the end, and the calculated ΣEi is a sum value. Therefore, K i should be smaller than K, and the adjustment does not need to be too sensitive.

[0061] When substituting ΣE i into formula (2), only substitute the numerical value without the unit.

[0062] Combined with Figure 3 as shown, the present disclosure embodiment provides another method for controlling a water-cooled chiller, including:

[0063] S101. When the water-cooled chiller starts, the processor obtains the current outlet water temperature.

[0064] S102. The processor calculates the first temperature difference value between the current outlet water temperature and the preset temperature.

[0065] S103. The processor controls the refrigeration capacity of the compressor according to the change trend of the first temperature difference value.

[0066] S104. While executing S103, the processor obtains the inlet water temperature.

[0067] S105: The processor determines the temperature change trend of the energy storage system according to the inlet water temperature.

[0068] S106: The processor adjusts the refrigeration capacity of the compressor according to the temperature change trend.

[0069] When the energy storage system is relatively stable, the first control scheme and the second control scheme are used alternately to keep the outlet water temperature stable. However, when the heat dissipation of the energy storage system fluctuates greatly, this control method will have a lag, causing the outlet water temperature of the water cooling unit to lag behind the temperature change of the energy storage system.

[0070] Therefore, in the process of alternately controlling the first control scheme and the second control scheme, the inlet water temperature is obtained by the second temperature sensor arranged at the water inlet end of the water cooling unit. According to the inlet water temperature, the temperature change trend of the energy storage system is predicted in advance. Then, according to the change trend of the energy storage temperature, the refrigeration capacity output by the compressor is adjusted. Thus, the outlet water temperature of the water cooling unit is close to or stabilized at the preset temperature.

[0071] Combination Figure 4 As shown, the embodiment of the present disclosure provides another method for controlling a water cooling unit, comprising:

[0072] S101, when the water cooling unit starts to start, the processor obtains the current outlet water temperature.

[0073] S102, the processor calculates a first temperature difference between the current outlet water temperature and a preset temperature.

[0074] S103: The processor controls the refrigeration capacity of the compressor according to the change trend of the first temperature difference value.

[0075] S104: The processor obtains the inlet water temperature while executing S103.

[0076] S115, the processor calculates the difference between the inlet water temperatures corresponding to adjacent preset moments.

[0077] S125: The processor determines the temperature change trend of the energy storage system according to the difference in the inlet water temperature.

[0078] S106: The processor adjusts the refrigeration capacity of the compressor according to the temperature change trend.

[0079] To set multiple preset times: 1 ,t 2 ,…,t n-1 ,t n . Get the water inlet temperature corresponding to these preset times: T 进1 , T 进2 ,…,T 进n-1 , T 进n .

[0080] Calculate the temperature difference values of the inlet water temperature corresponding to adjacent preset times respectively: M 1 = T 进2 - T 进1 , M 2 = T 进3 - T 进2 , …, M n-2 = T 进n-1 - T 进n-2 , M n-1 = T 进n - T 进n-1 .

[0081] According to formula (3), calculate the sum value ΣM of the temperature difference values of the inlet water temperature for a certain period of time i 进i :

[0082] ΣM 进i = (T 进n - T 进n-1 ) + (T 进n-1 - T 进n-2 ) + … + (T 进i-1 - T 进i ) Formula (3)

[0083] If ΣM 进i ≥ X (X is a constant), determine that the temperature change trend of the energy storage system is large fluctuations. If ΣM 进i < X, determine that the temperature change trend of the energy storage system is small fluctuations.

[0084] Then, according to the temperature change trend, adjust the refrigeration capacity of the compressor. Optionally, if it is determined that the temperature change trend is large fluctuations, it is necessary to increase the refrigeration capacity of the compressor to match the temperature change of the energy storage system. Therefore, at this time, control the compressor to operate at the maximum refrigeration capacity Q max .

[0085] Until ΣM 进i < X, then control the compressor to operate according to the first control scheme and the second control scheme.

[0086] If it is determined that the temperature change trend is small fluctuations, control the compressor to keep the current refrigeration capacity unchanged.

[0087] Combined with Figure 5 shown, the embodiments of the present disclosure provide another method for controlling a water-cooled unit, including:

[0088] S501, when the energy storage system is started, the processor obtains the outlet water temperature at this time.

[0089] S502, the processor calculates the second temperature difference value between the outlet water temperature at this time and the preset temperature.

[0090] S503: When the second temperature difference is greater than or equal to zero, the processor controls the water cooling unit to start.

[0091] S504: The processor obtains the current outlet water temperature.

[0092] S505: The processor calculates a first temperature difference between the current outlet water temperature and a preset temperature.

[0093] S506: The processor controls the refrigeration capacity of the compressor according to the change trend of the first temperature difference value.

[0094] When the energy storage system is started but the water cooling unit is not started, determine the timing of starting the water cooling unit. Obtain the outlet water temperature at this time, and calculate the second temperature difference between the outlet water temperature at this time and the preset temperature. Determine whether to control the water cooling unit to start according to the second temperature difference. If the second temperature difference is less than zero, it means that the outlet water temperature is lower than the preset temperature. At this time, the water cooling unit does not start refrigeration. If the second temperature difference is greater than or equal to zero, control the water cooling unit to start.

[0095] In this way, when the water cooling unit is not started, the difference between the outlet water temperature and the preset temperature is used to determine whether it is necessary to control the water cooling unit to start refrigeration in order to provide sufficient cooling capacity for the energy storage system.

[0096] The water outlet / water inlet temperature in the embodiments of the present disclosure refers to the water outlet / water inlet temperature of cooling water.

[0097] Combination Figure 6 As shown, the embodiment of the present disclosure provides a device for controlling a water cooling unit, including: an acquisition module 61, a calculation module 62 and a control module 63. The acquisition module 61 is configured to acquire the current outlet water temperature when the water cooling unit starts to start. The calculation module 61 is configured to calculate a first temperature difference between the current outlet water temperature and a preset temperature. The control module 63 is configured to control the refrigeration capacity of the compressor according to the change trend of the first temperature difference.

[0098] By using the device for controlling the water cooling unit provided by the embodiment of the present disclosure, when the water cooling unit starts to operate, the outlet water temperature is monitored in real time. The first temperature difference between the current outlet water temperature and the preset temperature is calculated. Then, based on the change trend of the first temperature difference value, the refrigeration capacity output by the compressor is controlled. In this way, the refrigeration capacity of the compressor matches the first temperature difference, so that the outlet water temperature is close to or even maintained at the preset temperature. Thereby reducing the deviation of the outlet water temperature of the water cooling unit to ensure the high-efficiency operation of the energy storage system.

[0099] Combination Figure 7As shown, the embodiment of the present disclosure provides a device for controlling a water cooling unit, including a processor (processor) 70 and a memory (memory) 71. Optionally, the device may also include a communication interface (CommunicationInterface) 71 and a bus 73. Among them, the processor 70, the communication interface 71, and the memory 71 can communicate with each other through the bus 73. The communication interface 71 can be used for information transmission. The processor 70 can call the logic instructions in the memory 71 to execute the method for controlling the water cooling unit of the above embodiment.

[0100] In addition, the logic instructions in the above-mentioned memory 71 can be implemented in the form of software functional units and can be stored in a computer-readable storage medium when sold or used as an independent product.

[0101] The memory 71 is a computer-readable storage medium that can be used to store software programs and computer executable programs, such as program instructions / modules corresponding to the method in the embodiment of the present disclosure. The processor 70 executes the function application and data processing by running the program instructions / modules stored in the memory 71, that is, the method for controlling the water cooling unit in the above embodiment is implemented.

[0102] The memory 71 may include a program storage area and a data storage area, wherein the program storage area may store an operating system and an application required for at least one function; the data storage area may store data created according to the use of the terminal device, etc. In addition, the memory 71 may include a high-speed random access memory and may also include a non-volatile memory.

[0103] An embodiment of the present disclosure provides a water cooling unit, comprising the above-mentioned device for controlling a water cooling unit.

[0104] An embodiment of the present disclosure provides a storage medium storing computer executable instructions, wherein the computer executable instructions are configured to execute the above method for controlling a water cooling unit.

[0105] The above-mentioned storage medium may be a transient computer-readable storage medium or a non-transitory computer-readable storage medium.

[0106] The above description and the accompanying drawings fully illustrate the embodiments of the present disclosure so that those skilled in the art can practice them. Other embodiments may include structural, logical, electrical, process and other changes. The embodiments represent only possible changes. Unless explicitly required, separate components and functions are optional, and the order of operation may vary. The parts and features of some embodiments may be included in or replace the parts and features of other embodiments. Moreover, the words used in this application are only used to describe the embodiments and are not used to limit the claims. As used in the description of the embodiments and the claims, unless the context clearly indicates, the singular forms of "a", "an" and "the" are intended to include plural forms as well. Similarly, the term "and / or" as used in this application refers to any and all possible combinations of listings containing one or more associated ones. In addition, when used in the present application, the term "comprise" and its variants "comprises" and / or comprising refer to the presence of stated features, wholes, steps, operations, elements, and / or components, but do not exclude the presence or addition of one or more other features, wholes, steps, operations, elements, components and / or groups thereof. In the absence of further restrictions, the elements defined by the sentence "comprising a ..." do not exclude the presence of other identical elements in the process, method or device comprising the elements. In this article, each embodiment may focus on the differences from other embodiments, and the same and similar parts between the various embodiments may refer to each other. For the methods, products, etc. disclosed in the embodiments, if they correspond to the method part disclosed in the embodiments, then the relevant parts can refer to the description of the method part.

[0107] Those skilled in the art will appreciate that the units and algorithm steps of each example described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are performed in hardware or software may depend on the specific application and design constraints of the technical solution. The technicians may use different methods for each specific application to implement the described functions, but such implementations should not be considered to exceed the scope of the embodiments of the present disclosure. The technicians may clearly understand that, for the convenience and simplicity of description, the specific working processes of the systems, devices and units described above may refer to the corresponding processes in the aforementioned method embodiments, and will not be repeated here.

[0108] In the embodiments disclosed herein, the disclosed methods and products (including but not limited to devices, equipment, etc.) can be implemented in other ways. For example, the device embodiments described above are only schematic. For example, the division of the units can be only a logical function division. There may be other division methods in actual implementation, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. In addition, the coupling or direct coupling or communication connection between each other shown or discussed can be through some interfaces, indirect coupling or communication connection of devices or units, which can be electrical, mechanical or other forms. The units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, they may be located in one place, or they may be distributed on multiple network units. Some or all of the units may be selected according to actual needs to implement this embodiment. In addition, each functional unit in the embodiment of the present disclosure may be integrated in a processing unit, or each unit may exist physically alone, or two or more units may be integrated in one unit.

[0109] The flowchart and block diagram in the accompanying drawings show the possible architecture, function and operation of the system, method and computer program product according to the embodiment of the present disclosure. In this regard, each box in the flowchart or block diagram can represent a module, a program segment or a part of the code, and the module, the program segment or a part of the code contains one or more executable instructions for realizing the specified logical function. In some alternative implementations, the functions marked in the box can also occur in a different order from the order marked in the accompanying drawings. For example, two consecutive boxes can actually be executed substantially in parallel, and they can sometimes be executed in the opposite order, which can depend on the functions involved. In the description corresponding to the flowchart and the block diagram in the accompanying drawings, the operations or steps corresponding to different boxes can also occur in a different order from the order disclosed in the description, and sometimes there is no specific order between different operations or steps. For example, two consecutive operations or steps can actually be executed substantially in parallel, and they can sometimes be executed in the opposite order, which can depend on the functions involved. Each block in the block diagrams and / or flowcharts, and combinations of blocks in the block diagrams and / or flowcharts, may be implemented by a dedicated hardware-based system that performs the specified functions or actions, or may be implemented by a combination of dedicated hardware and computer instructions.

Claims

1. A method for controlling a water cooling unit, It is characterized in that include: When the water cooling unit starts to start, obtain the current outlet water temperature; Calculate a first temperature difference between the current outlet water temperature and the preset temperature; Controlling the refrigeration capacity of the compressor according to the changing trend of the first temperature difference; Wherein, controlling the refrigeration capacity of the compressor according to the changing trend of the first temperature difference value includes: when the changing trend of the first temperature difference value is a decreasing trend, controlling the refrigeration capacity of the compressor according to the first temperature difference value; when the changing trend of the first temperature difference value is an increasing trend, controlling the refrigeration capacity of the compressor according to the temperature difference between the outlet water temperature corresponding to multiple preset moments and the preset temperature.

2. The method according to claim 1, It is characterized in that The step of controlling the refrigeration capacity of the compressor according to the first temperature difference value comprises: Q c =K*E n *Q w Among them, Q c is the refrigeration capacity of the compressor, K is a constant, E n is the first temperature difference, Q w The refrigeration capacity of the compressor when the chiller maintains steady-state operation.

3. The method according to claim 2, It is characterized in that The method of controlling the refrigeration capacity of the compressor according to the first temperature difference value further includes: In Q c When the pressure is greater than the maximum refrigeration capacity of the compressor, the compressor is controlled to operate at the maximum refrigeration capacity.

4. The method according to claim 1, It is characterized in that The method of controlling the refrigeration capacity of the compressor according to the temperature difference between the outlet water temperature corresponding to a plurality of preset moments and the preset temperature comprises: Calculate the sum of the temperature differences between the outlet water temperature corresponding to a plurality of preset moments and the preset temperature; The refrigeration capacity of the compressor is controlled according to the sum of the temperature differences.

5. The method according to claim 4, It is characterized in that The method of controlling the refrigeration capacity of the compressor according to the sum of the temperature differences comprises: Q c =K i *ΣE i *Q w Among them, Q c is the refrigeration capacity of the compressor; K i is a constant; ΣE i is the sum of all temperature differences; Q w The refrigeration capacity of the compressor when the chiller maintains steady-state operation.

6. The method according to any one of claims 1 to 5, It is characterized in that In the case of controlling the refrigeration capacity of the compressor according to the change trend of the first temperature difference value, the method further includes: Get the inlet water temperature; Determine the temperature change trend of the energy storage system based on the inlet water temperature; Adjust the refrigeration capacity of the compressor according to the temperature change trend.

7. The method according to claim 6, It is characterized in that Determining the temperature change trend of the energy storage system according to the inlet water temperature includes: Calculating the difference in water inlet temperatures corresponding to adjacent preset moments; According to the difference in inlet water temperature, the temperature change trend of the energy storage system is determined.

8. The method according to claim 7, It is characterized in that According to the difference in inlet water temperature, the temperature change trend of the energy storage system is determined, including: Calculate the sum of the temperature differences of the inlet water temperature for a period of time i ΣM 进i ; In ΣM 进i ≥X, it is determined that the temperature change trend of the energy storage system is a large fluctuation; X is a constant; In ΣM 进i <When X, it is determined that the temperature change trend of the energy storage system is small fluctuations.

9. The method according to claim 6, It is characterized in that The step of adjusting the refrigeration capacity of the compressor according to the temperature change trend includes: When it is determined that the temperature change trend is a large fluctuation, control the compressor to operate at the maximum refrigeration capacity; until ΣM 进i <X, control the refrigeration capacity of the compressor according to the change trend of the first temperature difference value; When it is determined that the temperature change trend is a small fluctuation, the compressor is controlled to keep the current refrigeration capacity unchanged.

10. The method according to any one of claims 1 to 5, It is characterized in that Before the water cooling unit starts to start, the method further includes: When the energy storage system is started and the water cooling unit is not started, a second temperature difference between the outlet water temperature and the preset temperature is calculated; When the second temperature difference is less than zero, the water cooling unit does not start cooling; When the second temperature difference is greater than or equal to zero, the water cooling unit is controlled to start.

11. A device for controlling a water cooling unit, comprising a processor and a memory storing program instructions, It is characterized in that The processor is configured to execute the method for controlling a water cooling unit according to any one of claims 1 to 10 when running the program instructions.

12. A water cooling unit, It is characterized in that It comprises the device for controlling a water cooling unit as claimed in claim 11.

13. A storage medium storing program instructions, It is characterized in that When the program instructions are executed, the method for controlling a water cooling unit according to any one of claims 1 to 10 is executed.

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