A water system control method, device, electronic device and storage medium

Abstract

The present application relates to a water system control method, device, electronic device, and storage medium. The water system control method includes: obtaining the operating parameters and target load of the water system; determining the target inlet and outlet water temperature difference when the total power of the water system is the lowest according to the operating parameters under the target load; and controlling the water flow rate of the water system according to the target inlet and outlet water temperature difference. Through the present application, the problem of the increase in the total power of the water system at the same load is solved, thereby improving the operating efficiency of the water system.

Description

Technical Field

[0001] This application relates to the technical field of air conditioners, and particularly to a water system control method, device, electronic device, and storage medium. Background Art

[0002] With the progress of life technology, water systems are often used in central air conditioners. The water system can perform heat exchange through hot and cold water to achieve the adjustment of the ambient temperature. The water system includes a unit and a water pump, and the unit includes a heat exchanger and a compressor. During the operation of the water system, when the water flow rate increases, the power of the water pump will increase synchronously. At this time, the heat exchange amount of the heat exchanger in the unit will increase synchronously, causing the refrigerant pressure inside the heat exchanger to decrease, thereby reducing the output power of the compressor in the unit, and vice versa.

[0003] When the existing water system is operating, under the condition of a fixed load, usually according to the set difference between the inlet and outlet water temperatures, the power of the unit or / and the water pump is adjusted to achieve the adjustment of the water flow rate. This adjustment method only controls according to the monotonic change relationship between the unit power or / and the water pump power and the water flow rate. However, under the same load, controlling the water system in the above manner is likely to cause an increase in the total power of the water system (the sum of the output powers of the unit and the water pump), resulting in low operating efficiency of the water system.

[0004] Therefore, how to improve the operating efficiency of the water system is a problem that needs to be solved. Summary of the Invention

[0005] In this embodiment, a water system control method, device, electronic device, and storage medium are provided to solve the problem of low operating efficiency of the water system in the related art.

[0006] In the first aspect, in this embodiment, a water system control method is provided, including:

[0007] Obtain the operating parameters of the water system and the target load, where the operating parameters include at least one of the inlet water temperature of the water system, the operating energy level of the unit in the water system, the temperature of the outdoor environment, and the humidity, and the operating energy level of the unit is determined according to the actual operating power and the rated power of the unit;

[0008] Under the target load, according to the operating parameters, determine the target difference between the inlet and outlet water temperatures when the total power of the water system is the lowest;

[0009] Control the water flow rate of the water system according to the target difference between the inlet and outlet water temperatures.

[0010] In some of these embodiments, the determining the target difference between the inlet and outlet water temperatures when the total power of the water system is the lowest according to the operating parameters includes:

[0011] Taking the total power of the water system as the target, establish an objective function between the operating parameters, the temperature difference between the inlet and outlet water of the water system, and the total power of the water system;

[0012] Determine the temperature difference between the inlet and outlet water corresponding to the minimum value of the objective function as the target temperature difference between the inlet and outlet water.

[0013] In some embodiments, the operating parameters include the inlet water temperature of the water system, the operating energy level of the units in the water system, the temperature and humidity of the outdoor environment. Determining the target temperature difference between the inlet and outlet water when the total power of the water system is the lowest according to the operating parameters includes:

[0014] According to a preset relational expression, establish a third-order objective function between the operating parameters, the temperature difference between the inlet and outlet water of the water system, and the total power of the water system;

[0015] Determine the target solutions of the derivative function of the third-order objective function to obtain a first target value and a second target value;

[0016] Respectively determine the total power corresponding to the first target value and the second target value;

[0017] Determine the target solution corresponding to the minimum total power as the target temperature difference between the inlet and outlet water.

[0018] In some embodiments, controlling the water flow rate of the water system according to the target temperature difference between the inlet and outlet water includes:

[0019] Determine the actual temperature difference between the inlet and outlet water of the water system;

[0020] Adjust the water flow rate of the water system according to the deviation between the actual temperature difference between the inlet and outlet water and the target temperature difference between the inlet and outlet water.

[0021] In some embodiments, the unit includes a plurality of sub-units, and the operating energy level of the units in the water system includes the average value of the operating energy levels of the plurality of sub-units.

[0022] In some embodiments, the unit includes a plurality of sub-units, and determining the actual temperature difference between the inlet and outlet water of the water system includes:

[0023] Determine the average value of the temperature differences between the inlet and outlet water of the plurality of sub-units as the actual temperature difference between the inlet and outlet water.

[0024] In some embodiments, the unit includes a plurality of sub-units, and determining the actual temperature difference between the inlet and outlet water of the water system includes:

[0025] Determine the sum of the temperature differences between the inlet and outlet water of all the sub-units;

[0026] Determine the ratio of the sum of the inlet and outlet water temperature differences to the sum of the operating energy levels of all the sub-units as the actual inlet and outlet water temperature difference.

[0027] In a second aspect, a water system control device is provided in this embodiment, including:

[0028] An acquisition module, configured to acquire the operating parameters of the water system and the target load, where the operating parameters include at least one of the inlet water temperature of the water system, the operating energy level of the units in the water system, the temperature and humidity of the outdoor environment, and the operating energy level of the unit is determined according to the actual operating power and the rated power of the unit;

[0029] A determination module, configured to determine the target inlet and outlet water temperature difference when the total power of the water system is the lowest according to the operating parameters under the target load;

[0030] A control module, configured to control the water flow of the water system according to the target inlet and outlet water temperature difference.

[0031] In a third aspect, an electronic device is provided in this embodiment, including a memory, a processor, and a computer program stored on the memory and executable on the processor, and when the processor executes the computer program, it implements the water system control method described in the first aspect above.

[0032] In a fourth aspect, a storage medium is provided in this embodiment, on which a computer program is stored, and when the program is executed by a processor, it implements the water system control method described in the first aspect above.

[0033] Compared with the related art, a water system control method, device, electronic device, and storage medium provided in this embodiment can determine the target inlet and outlet water temperature difference when the total power of the water system is the lowest according to the acquired operating parameters of the water system under the target load, and adjust the water flow according to the target inlet and outlet water temperature difference, so that the total power of the water system is the lowest under the same load, thereby effectively improving the operating efficiency of the water system.

[0034] Details of one or more embodiments of the present application are set forth in the following drawings and description to make other features, objects, and advantages of the present application more concise and understandable. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] The drawings described herein are used to provide a further understanding of the present application and form a part of the present application. The illustrative embodiments and descriptions of the present application are used to explain the present application and do not constitute an improper limitation of the present application.

[0036] Figure 1It is a hardware structure block diagram of a terminal for a water system control method provided by an embodiment of the present application.

[0037] Figure 2 It is a flowchart of a water system control method provided by an embodiment of the present application.

[0038] Figure 3 It is a schematic structural diagram of a water system provided by an embodiment of the present application.

[0039] Figure 4 It is a structural block diagram of a water system control device according to this embodiment. Specific embodiments

[0040] For a clearer understanding of the purpose, technical solution, and advantages of the present application, the present application will be described and illustrated below with reference to the accompanying drawings and embodiments.

[0041] Unless otherwise defined, the technical terms or scientific terms involved in the present application shall have the general meaning understood by those with ordinary skills in the technical field to which the present application belongs. In the present application, words such as "a", "one", "a kind of", "the", "these", etc. do not indicate a limitation in quantity, and they can be singular or plural. The terms "including", "comprising", "having" and any variations thereof involved in the present application are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or device including a series of steps or modules (units) is not limited to the listed steps or modules (units), but may include unlisted steps or modules (units), or may include other steps or modules (units) inherent in these processes, methods, products, or devices. The terms "connected", "coupled", etc. involved in the present application do not limit to physical or mechanical connections, but may include electrical connections, whether directly or indirectly. The "multiple" involved in the present application refers to two or more. "And / or" describes the association relationship of associated objects and indicates that three relationships may exist. For example, "A and / or B" may represent: A exists alone, A and B exist simultaneously, and B exists alone. Usually, the character " / " represents an "or" relationship between the associated objects before and after. The terms "first", "second", "third", etc. involved in the present application are only used to distinguish similar objects and do not represent a specific order for the objects.

[0042] The method embodiment provided in this embodiment can be executed on a terminal, a computer, or a similar computing device. For example, it runs on a terminal. Figure 1 It is a hardware structure block diagram of a terminal for a water system control method provided by an embodiment of the present application. As Figure 1 shown, the terminal may include one or more ( Figure 1Only one processor 102 and a memory 104 for storing data are shown. Among them, the processor 102 may include, but is not limited to, processing devices such as a microprocessor MCU or a field-programmable gate array FPGA. The above terminal may further include a transmission device 106 for communication functions and an input / output device 108. Those of ordinary skill in the art can understand that Figure 1 The structure shown is only schematic and does not limit the structure of the above terminal. For example, the terminal may further include more or fewer components than those Figure 1 shown, or have a different configuration from that Figure 1 shown.

[0043] The memory 104 can be used to store computer programs. For example, software programs and modules of application software, such as the computer program corresponding to the water system control method in this embodiment. The processor 102 executes various functional applications and data processing by running the computer program stored in the memory 104, that is, the above method is implemented. The memory 104 may include a high-speed random access memory, and may also include a non-volatile memory, such as one or more magnetic storage devices, flash memory, or other non-volatile solid-state memories. In some instances, the memory 104 may further include a memory remotely set relative to the processor 102, and these remote memories can be connected to the terminal through a network. Examples of the above network include, but are not limited to, the Internet, an enterprise intranet, a local area network, a mobile communication network, and combinations thereof.

[0044] The transmission device 106 is used to receive or send data via a network. The above network includes the wireless network provided by the communication supply ratio of the terminal. In one instance, the transmission device 106 includes a network adapter (Network Interface Controller, abbreviated as NIC), which can be connected to other network devices through a base station and thus communicate with the Internet. In one instance, the transmission device 106 may be a radio frequency (RF) module, which is used to communicate with the Internet wirelessly.

[0045] It should be noted that the water system in this application may refer to a hot (cold) water system applied to equipment such as central air conditioners and floor heating.

[0046] The water system has advantages such as good stability and low operating costs. Therefore, the water system is often used in equipment such as central air conditioners and floor heating. The water system includes a unit and a water pump. The unit includes a heat exchanger and a compressor. During the operation of the water system, when the water flow rate increases, the power of the water pump will increase synchronously. At this time, the heat exchange amount of the heat exchanger in the unit will increase synchronously, causing the refrigerant pressure inside the heat exchanger to decrease, thereby reducing the output power of the compressor in the unit, and vice versa.

[0047] When the existing water system is in operation and the load is determined, usually according to the set difference between the inlet and outlet water temperatures, the power of the unit or / and the water pump is adjusted to achieve the adjustment of the water flow rate. This adjustment method only controls according to the monotonic change relationship between the unit power or / and the water pump power and the water flow rate. However, in the actual operation process of the water system, the unit power, the water pump power, and the water flow rate do not only have a monotonic change relationship. When the load is fixed, there will be an optimal water flow rate value that minimizes the total output power of the water system. Therefore, when the load is the same, controlling the water system in the above manner easily leads to an increase in the total power of the water system (the sum of the output powers of the unit and the water pump), resulting in low operating efficiency of the water system.

[0048] Therefore, the present application provides a water system control method, device, electronic device, and storage medium to minimize the total power of the water system when the load is the same, so as to improve the operating efficiency of the water system.

[0049] In this embodiment, a water system control method is provided. In the embodiments of the present application, the execution subject of this method can be an electronic device. Optionally, the electronic device can be a server or a terminal device, but the present application is not limited thereto.

[0050] Figure 2 It is a flowchart of a water system control method provided by the embodiments of the present application. As Figure 2 shown, this process includes the following steps:

[0051] Step S201, obtain the operating parameters of the water system and the target load.

[0052] Among them, the operating parameters include at least one of the inlet water temperature of the water system, the operating energy level of the unit in the water system, the temperature and humidity of the outdoor environment. The operating energy level of the unit is determined according to the actual operating power and the rated power of the unit.

[0053] Exemplarily, the operating energy level of the unit can refer to the ratio of the actual operating power of the unit to the rated power.

[0054] It should be noted that the target load can be determined according to the indoor temperature set by the user or preset by the water system, and there is no limitation here.

[0055] Specifically, the water system can include a unit, a system controller, a water pipeline, and a water pump. The system controller can obtain at least one of the inlet water temperature in the water system, the operating energy level of the unit in the water system, the temperature and humidity of the outdoor environment in real time.

[0056] Step S202, at the target load, determine the target difference between the inlet and outlet water temperatures when the total power of the water system is the lowest according to the operating parameters.

[0057] Exemplarily, the total power of the water system may refer to the sum of the output powers of the unit and the water pump. When the target load is determined, according to the obtained operating parameters, the target inlet and outlet water temperature difference at which the total power of the water system is the lowest when the target load is satisfied is determined.

[0058] Step S203, control the water flow of the water system according to the target inlet and outlet water temperature difference.

[0059] Exemplarily, according to the heat exchange principle, under the condition that the target load is determined, the smaller the inlet and outlet water temperature difference of the water system, the larger the required water flow. On the contrary, the larger the inlet and outlet water temperature difference, the smaller the required water flow.

[0060] Control the water flow of the water system according to the determined target inlet and outlet water temperature difference. Specifically, detect the current actual inlet and outlet water temperature difference of the water system, and further determine the deviation between the actual inlet and outlet water temperature difference and the target inlet and outlet water temperature difference. If the actual inlet and outlet water temperature difference is less than the target inlet and outlet water temperature difference, it is necessary to increase the actual inlet and outlet water temperature difference, then control the water system to reduce the water flow so that the actual inlet and outlet water temperature difference is equal to the target inlet and outlet water temperature difference; if the actual inlet and outlet water temperature difference is greater than the target inlet and outlet water temperature difference, it is necessary to decrease the actual inlet and outlet water temperature difference, then control the water system to increase the water flow so that the actual inlet and outlet water temperature difference is equal to the target inlet and outlet water temperature difference.

[0061] Further, when at least one of the operating parameters such as the inlet water temperature of the water system, the operating energy level of the unit, the temperature and humidity of the outdoor environment changes, determine the current target inlet and outlet water temperature difference according to the above steps S201 - S202, and further control the water flow of the water system according to step S203.

[0062] In the above implementation process, by obtaining the operating parameters of the water system in real time, and further determining the current target inlet and outlet water temperature difference corresponding to the lowest total power of the water system when the target load is satisfied according to the operating parameters, and controlling the water flow of the water system according to the current target inlet and outlet water temperature difference, it is possible to determine the current target inlet and outlet water temperature difference according to the real-time operating parameters of the water system during the operation of the water system, and when controlling the water flow according to the target inlet and outlet water temperature difference, the total power output by the water system is the lowest, thereby improving the operating efficiency of the water system.

[0063] In some of the embodiments, determining the target inlet and outlet water temperature difference at which the total power of the water system is the lowest according to the operating parameters may include the following steps:

[0064] Step 1: Take the total power of the water system as the target, and establish an objective function between the operating parameters, the inlet and outlet water temperature difference of the water system, and the total power of the water system.

[0065] Exemplarily, the target inlet and outlet water temperature difference is determined by establishing an objective function. Specifically, the total power of the water system is used as the dependent variable of the objective function, and the operating parameters and the target inlet and outlet water temperature difference are used as the independent variables of the objective function to establish the objective function.

[0066] Step 2: Determine the inlet and outlet water temperature difference corresponding to the minimum value of the objective function as the target inlet and outlet water temperature difference.

[0067] Exemplarily, substitute the currently obtained operating parameters into the objective function, and determine the corresponding inlet and outlet water temperature difference when the objective function is minimized, that is, determine the corresponding inlet and outlet water temperature difference when the total power of the water system is minimized. At this time, this inlet and outlet water temperature value is the current target inlet and outlet water temperature difference.

[0068] In the above implementation process, when the target load is satisfied, the target inlet and outlet water temperature difference corresponding to the minimum total power of the water system is determined by establishing an objective function. Further, during the operation of the water system, the water flow is controlled according to the determined target inlet and outlet water temperature difference to achieve the target load, which can minimize the total power of the current water system, thereby improving the operation efficiency of the water system.

[0069] In some of these embodiments, the operating parameters include the inlet water temperature of the water system, the operating energy level of the units in the water system, the temperature and humidity of the outdoor environment. According to the operating parameters, determining the target inlet and outlet water temperature difference when the total power of the water system is the lowest may include the following steps:

[0070] Step 1: According to the preset relational expression, establish a third-order objective function between the operating parameters, the inlet and outlet water temperature difference of the water system, and the total power of the water system.

[0071] Exemplarily, if the total power of the water system is Y, the inlet and outlet water temperature difference of the water system is X1, and the operating parameters include the inlet water temperature X2 of the water system, the outdoor environment temperature X3, the outdoor environment humidity X4, and the operating energy level X5 of the units in the water system.

[0072] Further, taking X1, X2, X3, X4, X5, a total of 5 parameters as independent variables and Y as the dependent variable, using a linear regression model, establish a 5-variable cubic polynomial equation (1), and equation (1) is specifically:

[0073] Y = b0 + (b1)*(X1) + (b2)*(X2) + (b3)*(X3) + (b4)*(X4) + (b5)*X5 + (b11)*(X1)^2 + (b22)*(X2)^2 + (b33)*(X3)^2 + (b44)*(X4)^2 + (b55)*(X5)^2 + (b12)*(X1)*(X2) + (b13)*(X1)*(X3) + (b14)*(X1)*(X4) + (b15)*(X1)*(X5) + (b23)*(X2)*(X3) + (b24)*(X2)*(X4) + (b25)*(X2)*(X5) + (b34)*(X3)*(X4) + (b35)*(X3)*(X5) + (b46)*(X4)*(X5) + b111*X1^3 + b222*X2^3 + b333*X3^3 + b444*X4^3 + b555*X5^3 + b112*X1^2*X2 + b113*X1^2*X3 + b114*X1^2*X4 + b115*X1^2*X5 + b221*X2^2*X1 + b223*X2^2*X3 + b224*X2^2*X4 + b225*X2^2*X5 + b331*X3^2*X1 + b332*X3^2*X2 + b334*X3^2*X4 + b335*X3^2*X5 + b441*X4^2*X1 + b442*X4^2*X2 + b443*X4^2*X3 + b446*X4^2*X5 + b551*X5^2*X1 + b552*X5^2*X2 + b553*X5^2*X3 + b554*X5^2*X4(1)

[0074] Wherein, b0, b1, b2, b3, b4, b5, b11, b22, b33, b44, b55, b12, b13, b14, b15, b23, b24, b25, b34, b35, b46, b111, b222, b333, b444, b555, b112, b113, b114, b115, b221, b223, b224, b225, b331, b332, b334, b335, b441, b442, b443, b446, b551, b552, b553, b554 are polynomial coefficients.

[0075] It should be noted that the above 46 polynomial coefficients can be preset in the database, can be determined according to multiple groups of experimental data, or can be determined according to the least square method or other methods, and there is no limitation here.

[0076] Step 2: Determine the target solutions of the derivative function of the third-order objective function to obtain the first target value and the second target value.

[0077] Exemplarily, during the operation of the water system, the operating parameters X2, X3, X4, and X5 of the water system are obtained at preset time intervals. Further, the actual operating data of the obtained X2, X3, X4, and X5 are substituted into the above equation (1), with X1 as the independent variable and Y as the dependent variable, thereby obtaining a cubic polynomial equation (2) between Y and X1:

[0078] Y = c0 + (c1)*(X1) + (c2)*(X1)^2 + (c3)*(X1)^3 (2)

[0079] where c0, c1, c2, and c3 are the four polynomial coefficients of equation (2).

[0080] Further, the derivative of the right side of equation (2) is taken and the derivative function is set equal to 0, thereby obtaining a quadratic polynomial equation (3) with respect to the variable X1:

[0081] d0 + (d1)*(X1) + (d2)*(X1)^2 = 0 (3)

[0082] where d0, d1, and d2 are the three polynomial coefficients.

[0083] Step 3: Determine the total power corresponding to the first target value and the second target value respectively.

[0084] Further, two roots of equation (3) are determined, which are the first target value X1A and the second target value X1B respectively.

[0085] Further, the total power corresponding to the first target value X1A and the second target value X1B is determined respectively. Specifically, X1A and X1B are substituted into equation 2 respectively to obtain two Y values, denoted as YA and YB respectively.

[0086] Step 4: Determine the target solution corresponding to the minimum total power as the target inlet and outlet water temperature difference.

[0087] Exemplarily, the minimum value Ymin of the two values YA and YB is taken. If YB is smaller, then Ymin = YB, and the corresponding target inlet and outlet water temperature difference is X1B; if YB is larger, then Ymin = YA, and the corresponding target inlet and outlet water temperature difference is X1A.

[0088] In the above implementation process, a third-order objective function is established between the operating parameters, the temperature difference between the inlet and outlet water of the water system, and the total power of the water system through a preset relational expression. By determining the target solution when the derivative function of the third-order objective function is zero, the first target value and the second target value are obtained. Thus, the temperature difference between the inlet and outlet water corresponding to the maximum and minimum total power can be obtained when the target solution of the derivative function of the third-order objective function is zero. Further, the target solution corresponding to the minimum total power is determined as the target temperature difference between the inlet and outlet water, thereby determining the target temperature difference between the inlet and outlet water. And the water flow of the water system is adjusted through the target temperature difference between the inlet and outlet water, so that when the target load is reached, the total power of the water system is the lowest.

[0089] In some of these embodiments, controlling the water flow of the water system according to the target temperature difference between the inlet and outlet water may include the following steps:

[0090] Step 1: Determine the actual temperature difference between the inlet and outlet water of the water system.

[0091] Exemplarily, the system controller detects that the actual temperature difference between the inlet and outlet water of the water system is X.

[0092] Step 2: Adjust the water flow of the water system according to the deviation between the actual temperature difference between the inlet and outlet water and the target temperature difference between the inlet and outlet water.

[0093] Exemplarily, when the actual temperature difference between the inlet and outlet water is less than the target temperature difference between the inlet and outlet water, that is, the actual temperature difference is too small, the system controller issues an adjustment instruction to reduce the water flow of the water system so as to increase the actual temperature difference X; when the actual temperature difference between the inlet and outlet water is greater than the target temperature difference between the inlet and outlet water, that is, the actual temperature difference is too large, the system controller issues an adjustment instruction to increase the water flow of the water system so as to reduce the actual temperature difference X, so that X is always close to the target temperature difference between the inlet and outlet water.

[0094] In the above implementation process, the water flow of the water system is adjusted through the deviation between the actual temperature difference between the inlet and outlet water and the target temperature difference between the inlet and outlet water, so that the actual temperature difference between the inlet and outlet water of the water system is the same as the target temperature difference between the inlet and outlet water, and the water system adjusts the water flow with the lowest total power to reach the target load, further improving the operating efficiency of the water system.

[0095] In some of these embodiments, the unit includes a plurality of sub-units, and the operating energy level of the unit in the water system includes the average value of the operating energy levels of the plurality of sub-units.

[0096] Exemplarily, the operating energy level of the unit is the ratio of the actual operating power of the unit to the rated power. For energy conservation and noise control, multiple sub-units are used in parallel in the water system. That is, the unit in the water system may include a plurality of sub-units, and the plurality of sub-units are connected in parallel. At this time, the operating energy level of the unit in the water system may be the average value of the operating energy levels of the plurality of sub-units.

[0097] In the above implementation process, heat exchange is carried out through multiple sub-units, which can improve the energy utilization rate of the water system. Moreover, by determining the average value of the operating energy levels of multiple sub-units as the operating energy level of the water system, the accuracy of determining the operating energy level of the water system can be improved.

[0098] In some of these embodiments, the unit includes multiple sub-units. To determine the actual temperature difference between the inlet and outlet water of the water system, the average value of the temperature differences between the inlet and outlet water of multiple sub-units can be determined as the actual temperature difference between the inlet and outlet water.

[0099] Exemplarily, Figure 3 is a schematic structural diagram of a water system provided by an embodiment of the present application. As Figure 3 shown, the water system includes three sub-units, namely unit A, unit B, and unit C, corresponding to Figure 3 the labels in it are: unit A is 31, unit B is 32, and unit C is 33. Moreover, each sub-unit includes 3 sub-unit modules. Specifically, as Figure 3 shown, unit A includes 3 sub-unit modules, namely sub-unit module 311, sub-unit module 312, and sub-unit module 313. The corresponding operating energy level of sub-unit module 311 is 0%, the corresponding operating energy level of sub-unit module 312 is 50%, and the corresponding operating energy level of sub-unit module 313 is 100%. Unit B includes 3 sub-unit modules, namely sub-unit module 321, sub-unit module 322, and sub-unit module 323. The corresponding operating energy level of sub-unit module 321 is 100%, the corresponding operating energy level of sub-unit module 322 is 0%, and the corresponding operating energy level of sub-unit module 323 is 50%. Unit C includes 3 sub-unit modules, namely sub-unit module 331, sub-unit module 332, and sub-unit module 333. The corresponding operating energy level of sub-unit module 331 is 100%, the corresponding operating energy level of sub-unit module 332 is 100%, and the corresponding operating energy level of sub-unit module 333 is 100%.

[0100] In addition, Figure 3The water system shown also includes unit A controller 34, unit B controller 35, unit C controller 36, system controller 37, and water pump 38. The system controller 37 detects that the total inlet water temperature of the water system is Tr, the total outlet water temperature of the water system is Tout, the inlet water temperatures of unit A, unit B, and unit C are TAr, TBr, and TCr respectively, the outlet water temperature of sub-unit module 311 is TA1, the outlet water temperature of sub-unit module 312 is TA2, and the outlet water temperature of sub-unit module 313 is TA3; the outlet water temperature of sub-unit module 321 is TB1, the outlet water temperature of sub-unit module 322 is TB2, and the outlet water temperature of sub-unit module 323 is TB3; the outlet water temperature of sub-unit module 331 is TC1, the outlet water temperature of sub-unit module 332 is TC2, and the outlet water temperature of sub-unit module 333 is TC3.

[0101] It should be noted that the type of the sub-unit module can be a vapor compression refrigeration cycle driven by an electric motor, a central air conditioner using air as the heat (cold) source, or a process heat (cold) water device. The sub-unit is internally provided with a heat exchanger and a compressor. There are refrigerant pipelines and water pipelines in the heat exchanger. Refrigerant and water conduct heat exchange in the heat exchanger. The operating energy level of the sub-unit module can be adjusted by a switch. The system controller and the unit controller can conduct data communication to exchange data with each other.

[0102] Exemplarily, the actual temperature difference between the inlet and outlet of the water system can be Tr - Tout.

[0103] As another example, the actual temperature difference between the inlet and outlet of the water system can be the average value of (TAr - TA1), (TAr - TA2), (TAr - TA3), (TBr - TB1), (TBr - TB2), (TBr - TB3), (TCr - TC1), (TCr - TC2), and (TCr - TC3).

[0104] In the above implementation process, determining the average value of the temperature differences between the inlet and outlet of each sub-unit module as the actual temperature difference between the inlet and outlet of the water system can improve the accuracy of determining the actual temperature difference between the inlet and outlet of the water system.

[0105] As another example, during the actual operation of the water system, the total inlet water temperature of the water system is the same as the inlet water temperatures of each branch pipe, that is, TAr = TBr = TCr = Tr. Then the actual temperature difference between the inlet and outlet of the water system can be the average value of (Tr - TA1), (Tr - TA2), (Tr - TA3), (Tr - TB1), (Tr - TB2), (Tr - TB3), (Tr - TC1), (Tr - TC2), and (Tr - TC3).

[0106] In the above implementation process, by determining the total inlet water temperature of the water system as the inlet water temperature of each branch pipe, the process of detecting the inlet water temperature of each branch pipe can be reduced, and the operating efficiency of the water system can be improved.

[0107] In some of these embodiments, the unit includes a plurality of sub-units. Determining the actual temperature difference between the inlet and outlet water of the water system includes:

[0108] Step 1: Determine the sum of the temperature differences between the inlet and outlet water of all sub-units.

[0109] Step 2: Determine the ratio of the sum of the temperature differences between the inlet and outlet water to the sum of the operating energy levels of all sub-units as the actual temperature difference between the inlet and outlet water.

[0110] Exemplarily, if the sum of the temperature differences between the inlet and outlet water of all sub-units is Tds.

[0111] As an example, Tds = (TAr - TA1) + (TAr - TA2) + (TAr - TA3) + (TBr - TB1) + (TBr - TB2) + (TBr - TB3) + (TCr - TC1) + (TCr - TC2) + (TCr - TC3).

[0112] As another example, Tds = (Tr - TA1) + (Tr - TA2) + (Tr - TA3) + (Tr - TB1) + (Tr - TB2) + (Tr - TB3) + (Tr - TC1) + (Tr - TC2) + (Tr - TC3).

[0113] Further, determine the sum of the operating energy levels of all sub-units Es, then Es = 0% + 50% + 100% + 100% + 0% + 50% + 100% + 100% + 100%.

[0114] Then the actual temperature difference between the inlet and outlet water Tdt = Tds / Es.

[0115] In some of these embodiments, the unit includes a plurality of sub-units. Determining the actual temperature difference between the inlet and outlet water of the water system includes: determining the ratio of the sum of the temperature differences between the inlet and outlet water of the sub-unit modules with non-zero operating energy levels to the sum of the operating energy levels of the sub-unit modules with non-zero operating energy levels as the actual temperature difference between the inlet and outlet water.

[0116] Exemplarily, as Figure 3 shown, the sub-unit modules with non-zero operating energy levels include: sub-unit module 312 with an operating energy level of 50%; sub-unit module 313 with an operating energy level of 100%; sub-unit module 321 with an operating energy level of 100%; sub-unit module 323 with an operating energy level of 50%; sub-unit module 331 with an operating energy level of 100%; sub-unit module 332 with an operating energy level of 100%; sub-unit module 333 with an operating energy level of 100%.

[0117] Then, the sum of the inlet and outlet water temperature differences Tds of the sub-unit modules with non-zero operating energy levels is Tds = (TAr - TA2) + (TAr - TA3) + (TBr - TB1) + (TBr - TB3) + (TCr - TC1) + (TCr - TC2) + (TCr - TC3), or Tds = (Tr - TA2) + (Tr - TA3) + (Tr - TB1) + (Tr - TB3) + (Tr - TC1) + (Tr - TC2) + (Tr - TC3).

[0118] Furthermore, the sum of the operating energy levels Es of the sub-unit modules with non-zero operating energy levels is Es = 50% + 100% + 100% + 50% + 100% + 100% + 100%.

[0119] Furthermore, the actual inlet and outlet water temperature difference Tdt = Tds / Es.

[0120] Furthermore, the system controller 37 controls the water pump 38 to adjust the water flow rate according to the deviation between the actual inlet and outlet water temperature difference and the target inlet and outlet water temperature difference.

[0121] It should be noted that the water pump 38 can adjust the water inflow rate or the water outflow rate, and there is no limitation here.

[0122] In the above implementation process, by determining the ratio of the sum of the inlet and outlet water temperature differences of the sub-unit modules with non-zero operating energy levels to the sum of the operating energy levels of the sub-unit modules with non-zero operating energy levels as the actual inlet and outlet water temperature difference, it is possible to accurately determine the actual inlet and outlet water temperature difference generated after the actual effective sub-unit modules work during the operation of the water system, thereby improving the accuracy of determining the actual inlet and outlet water temperature difference of the water system. Further, the water flow rate can be adjusted according to the deviation between the accurate actual inlet and outlet water temperature difference and the target inlet and outlet water temperature difference, improving the accuracy of water flow rate adjustment of the water system.

[0123] In some of the embodiments, the unit includes multiple sub-units. Determining the actual inlet and outlet water temperature difference of the water system includes: determining the ratio of the sum of the inlet and outlet water temperature differences of the sub-unit modules with an operating energy level not equal to 50% to the sum of the operating energy levels of the sub-unit modules with an operating energy level not equal to 50% as the actual inlet and outlet water temperature difference.

[0124] In the above implementation process, by determining the ratio of the sum of the temperature differences between the inlet and outlet water of the sub-unit modules at the specified operating energy level to the sum of the operating energy levels of the corresponding sub-unit modules as the actual temperature difference between the inlet and outlet water of the water system, the actual temperature difference between the inlet and outlet water of the entire water system can be reflected by the actual temperature differences between the inlet and outlet water of some sub-unit modules. Thus, it is not necessary to determine the temperature difference between the outlet water of each sub-unit module to determine the actual temperature difference between the inlet and outlet water of the entire water system, simplifying the determination process of the actual temperature difference between the inlet and outlet water, and thereby improving the overall operating efficiency of the water system.

[0125] In the above implementation process, based on the operating parameters and the target load of the water system obtained, the target temperature difference between the inlet and outlet water when the total power of the water system is the lowest is determined, and the water flow rate is adjusted according to the target temperature difference between the inlet and outlet water. Thus, under the same target load, the total power of the water system can be the lowest, effectively improving the operating efficiency of the water system.

[0126] It should be noted that the steps shown in the above process or the flowchart of the accompanying drawings can be executed in a computer system such as a set of computer-executable instructions. And although the logical order is shown in the flowchart, in some cases, the steps shown or described can be executed in a different order than here.

[0127] In this embodiment, a water system control device is also provided. This device is used to implement the above embodiment and the preferred implementation manners, and those that have been described will not be repeated here. The following terms such as "module", "unit", "sub-unit", etc. can be a combination of software and / or hardware that can achieve a predetermined function. Although the devices described in the following embodiments are preferably implemented in software, implementation in hardware, or a combination of software and hardware is also possible and contemplated.

[0128] Figure 4 is a structural block diagram of a water system control device according to this embodiment, as Figure 4 shown, this device includes:

[0129] An acquisition module 401, configured to acquire the operating parameters of the water system and the target load, where the operating parameters include at least one of the inlet water temperature of the water system, the operating energy level of the units in the water system, the temperature and humidity of the outdoor environment, and the operating energy level of the unit is determined according to the actual operating power and the rated power of the unit.

[0130] A determination module 402, configured to determine the target temperature difference between the inlet and outlet water when the total power of the water system is the lowest according to the operating parameters under the target load.

[0131] A control module 403, configured to control the water flow rate of the water system according to the target temperature difference between the inlet and outlet water.

[0132] In some of these embodiments, the determining module 402 is specifically configured to:

[0133] Taking the total power of the water system as the target, establish an objective function between the operating parameters, the temperature difference between the inlet and outlet water temperatures of the water system, and the total power of the water system.

[0134] Determine the temperature difference between the inlet and outlet water temperatures corresponding to the minimum value of the objective function as the target temperature difference between the inlet and outlet water temperatures.

[0135] In some of these embodiments, the operating parameters include the inlet water temperature of the water system, the operating energy level of the units in the water system, the temperature and humidity of the outdoor environment. The determining module 402 is specifically configured to:

[0136] According to a preset relational expression, establish a third-order objective function between the operating parameters, the temperature difference between the inlet and outlet water temperatures of the water system, and the total power of the water system.

[0137] Determine the target solutions of the derivative function of the third-order objective function to obtain a first target value and a second target value.

[0138] Respectively determine the total power corresponding to the first target value and the second target value.

[0139] Determine the target solution corresponding to the minimum total power as the target temperature difference between the inlet and outlet water temperatures.

[0140] In some of these embodiments, the control module 403 is specifically configured to:

[0141] Determine the actual temperature difference between the inlet and outlet water temperatures of the water system.

[0142] Adjust the water flow rate of the water system according to the deviation between the actual temperature difference between the inlet and outlet water temperatures and the target temperature difference between the inlet and outlet water temperatures.

[0143] In some of these embodiments, the unit includes a plurality of sub-units, and the operating energy level of the units in the water system includes the average value of the operating energy levels of the plurality of sub-units.

[0144] In some of these embodiments, the unit includes a plurality of sub-units, and the control module 403 is specifically configured to: Determine the average value of the temperature differences between the inlet and outlet water temperatures of the plurality of sub-units as the actual temperature difference between the inlet and outlet water temperatures.

[0145] In some of these embodiments, the unit includes a plurality of sub-units, and the control module 403 is specifically configured to:

[0146] Determine the sum of the temperature differences between the inlet and outlet water temperatures of all sub-units.

[0147] Determine the ratio of the sum of the temperature differences between the inlet and outlet water temperatures to the sum of the operating energy levels of all sub-units as the actual temperature difference between the inlet and outlet water temperatures.

[0148] It should be noted that each of the above modules can be a functional module or a program module, and can be implemented either by software or by hardware. For the modules implemented by hardware, each of the above modules can be located in the same processor; or each of the above modules can be located in different processors in any combined form.

[0149] In this embodiment, an electronic device is further provided, including a memory and a processor. A computer program is stored in the memory, and the processor is configured to run the computer program to execute the steps in any one of the above method embodiments.

[0150] Optionally, the above electronic device may further include a transmission device and an input / output device, wherein the transmission device is connected to the above processor, and the input / output device is connected to the above processor.

[0151] Optionally, in this embodiment, the above processor may be configured to execute the following steps through a computer program:

[0152] S1, obtain the operating parameters of the water system and the target load, wherein the operating parameters include at least one of the inlet water temperature of the water system, the operating energy level of the unit in the water system, the temperature and humidity of the outdoor environment, and the operating energy level of the unit is determined according to the actual operating power and the rated power of the unit.

[0153] S2, under the target load, determine the target inlet and outlet water temperature difference when the total power of the water system is the lowest according to the operating parameters.

[0154] S3, control the water flow of the water system according to the target inlet and outlet water temperature difference.

[0155] It should be noted that the specific examples in this embodiment can refer to the examples described in the above embodiments and optional implementation manners, and will not be repeated in this embodiment.

[0156] In addition, in combination with the water system control method provided in the above embodiments, a storage medium can also be provided to implement it in this embodiment. A computer program is stored on the storage medium; when the computer program is executed by a processor, any one of the water system control methods in the above embodiments is implemented.

[0157] It should be understood that the specific embodiments described here are only used to explain this application, rather than to limit it. According to the embodiments provided in this application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of this application.

[0158] Obviously, the accompanying drawings are only some examples or embodiments of the present application. For those of ordinary skill in the art, the present application can also be applied to other similar situations based on these drawings without creative work. Additionally, it can be understood that although the work done during this development process may be complex and time-consuming, for those of ordinary skill in the art, certain design, manufacturing, or production changes based on the technical content disclosed in the present application are only conventional technical means and should not be regarded as insufficient disclosure of the present application.

[0159] The term "embodiment" in this application means that the specific features, structures, or characteristics described in connection with the embodiment may be included in at least one embodiment of the present application. The phrase appears in various positions in the specification and does not necessarily mean the same embodiment, nor does it mean independence or alternative to other embodiments that are mutually exclusive. Those of ordinary skill in the art can clearly or implicitly understand that the embodiments described in this application can be combined with other embodiments without conflict.

[0160] The above-described embodiments merely represent several implementation manners of the present application. The description is relatively specific and detailed, but it should not be construed as a limitation on the scope of patent protection. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present application, several variations and improvements can still be made, and these all fall within the protection scope of the present application. Therefore, the protection scope of the present application shall be subject to the appended claims.

Claims

1. A water system control method, characterized in that, Including: Obtain the operating parameters of the water system and the target load, where the operating parameters include at least one of the inlet water temperature of the water system, the operating energy level of the units in the water system, the temperature and humidity of the outdoor environment, and the operating energy level of the unit is determined according to the actual operating power and the rated power of the unit; Under the target load, determine the target inlet and outlet water temperature difference when the total power of the water system is the lowest according to the operating parameters; Control the water flow of the water system according to the target inlet and outlet water temperature difference; The unit includes a plurality of sub-units; the controlling the water flow of the water system according to the target inlet and outlet water temperature difference includes: Determine the sum of the inlet and outlet water temperature differences of all the sub-units; Determine the ratio of the sum of the inlet and outlet water temperature differences to the sum of the operating energy levels of all the sub-units as the actual inlet and outlet water temperature difference; Adjust the water flow of the water system according to the deviation between the actual inlet and outlet water temperature difference and the target inlet and outlet water temperature difference.

2. The water system control method according to claim 1, wherein The determining the target inlet and outlet water temperature difference when the total power of the water system is the lowest according to the operating parameters includes: Taking the total power of the water system as the target, establish an objective function between the operating parameters, the inlet and outlet water temperature difference of the water system and the total power of the water system; Determine the inlet and outlet water temperature difference corresponding to the minimum value of the objective function as the target inlet and outlet water temperature difference.

3. The water system control method according to claim 1, characterized in that, The operating parameters include the inlet water temperature of the water system, the operating energy level of the units in the water system, the temperature and humidity of the outdoor environment, and the determining the target inlet and outlet water temperature difference when the total power of the water system is the lowest according to the operating parameters includes: According to a preset relational expression, establish a third-order objective function between the operating parameters, the inlet and outlet water temperature difference of the water system and the total power of the water system; Determine the target solutions of the derivative function of the third-order objective function to obtain a first target value and a second target value; Respectively determine the total power corresponding to the first target value and the second target value; Determine the target solution corresponding to the minimum total power as the target inlet and outlet water temperature difference.

4. The water system control method according to claim 1, wherein The unit includes a plurality of sub-units, and the operating energy level of the units in the water system includes the average value of the operating energy levels of the plurality of sub-units.

5. A water system control device, characterized in that, Including: An obtaining module, configured to obtain the operating parameters of the water system and the target load, where the operating parameters include at least one of the inlet water temperature of the water system, the operating energy level of the units in the water system, the temperature and humidity of the outdoor environment, and the operating energy level of the unit is determined according to the actual operating power and the rated power of the unit; the unit includes a plurality of sub-units; A determining module, configured to determine the target inlet and outlet water temperature difference when the total power of the water system is the lowest according to the operating parameters under the target load; A control module, configured to determine the sum of the inlet and outlet water temperature differences of all the sub-units, determine the ratio of the sum of the inlet and outlet water temperature differences to the sum of the operating energy levels of all the sub-units as the actual inlet and outlet water temperature difference, and adjust the water flow of the water system according to the deviation between the actual inlet and outlet water temperature difference and the target inlet and outlet water temperature difference.

6. An electronic device, comprising a memory and a processor, characterized in that, A computer program is stored in the memory, and the processor is configured to run the computer program to execute the water system control method according to any one of claims 1 to 4.

7. A computer-readable storage medium having a computer program stored thereon, characterized in that, When the computer program is executed by the processor, the steps of the water system control method according to any one of claims 1 to 4 are implemented.

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