A control device, method and storage medium for an air conditioning refrigeration system

Abstract

The application provides a control device, method and storage medium for an air conditioning refrigeration system, and belongs to the technical field of air conditioning equipment, and comprises a control terminal, a centralized control component, a cooling control assembly, a return water control assembly and a water supply control assembly; the control terminal is connected with the centralized control component; the centralized control component is connected with the cooling control assembly, the return water control assembly and the water supply control assembly respectively; the return water control assembly is connected with the cooling control assembly and the user terminal respectively; and the water supply control assembly is connected with the cooling control assembly and the user terminal respectively. The application solves the problem that the cooling load cannot be predicted and controlled, and improves the production efficiency, so that full-automatic control is realized.

Description

Technical Field

[0001] This invention relates to the field of air conditioning equipment technology, specifically to a control device, method, and storage medium for an air conditioning refrigeration system. Background Technology

[0002] Currently, chilled water used in air conditioning refrigeration systems is supplied by cooling water units. However, these units are only manually controlled for start-up and shutdown, making it impossible to predict and control cooling load. This easily leads to insufficient cooling supply and over-distribution, resulting in many shortcomings in production assurance and energy management. Existing control methods simply display the control unit on a computer. The PLC configuration and operational logic are simple, lacking precise and algorithmic control. This lack of control precision also makes it difficult to achieve high energy efficiency. Furthermore, existing control methods are simplistic, only monitoring equipment and providing basic start-up and shutdown control. The need for manual operation prevents fully automated operation, leading to energy waste during unit operation. Additionally, they lack the ability to analyze energy consumption.

[0003] Most existing control methods only monitor the operating status of equipment such as chiller units, water pumps, and cooling tower fans. This simple control can only meet some basic requirements and cannot meet functions such as automatic switching, automatic start-up and shutdown, and automatic adjustment according to load. As a result, the energy efficiency is not high and can no longer meet the needs of enterprise development. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to provide a control device, method and storage medium for air conditioning refrigeration system, which addresses the shortcomings of the prior art.

[0005] The technical solution of the present invention to solve the above-mentioned technical problems is as follows: A control device for an air conditioning refrigeration system, comprising a control terminal, a centralized control component, a cooling control component, a return water control component, and a supply water control component.

[0006] The control terminal is connected to the centralized control component, the centralized control component is connected to the cooling control component, the return water control component and the supply water control component respectively, the return water control component is connected to the cooling control component and the user terminal respectively, and the supply water control component is connected to the cooling control component and the user terminal respectively.

[0007] The control terminal is used to import cooling demand parameters and generate start commands. The cooling demand parameters include cooling demand temperature data.

[0008] The centralized control component is also used to obtain real-time temperature data from the cooling control component according to the start command. When the real-time temperature data is greater than the cooling demand temperature data, a first cooling start command, a first return water start command, and a first water supply start command are generated.

[0009] The cooling control component is used to activate at least one cooling component according to the first cooling activation command;

[0010] The water return control component is used to activate any one of the water return components according to the first water return activation command;

[0011] The water supply control component is used to activate any one of the water supply components according to the first water supply activation command.

[0012] The cooling control component is also used to obtain real-time cooling data after a preset time has elapsed, and to activate at least one cooling component from the remaining cooling components based on the real-time cooling data and the cooling demand parameters.

[0013] The return water control component is also used to access the water to be cooled from the user terminal, and to activate at least one return water component from the remaining return water components according to at least one cooling component.

[0014] The water supply control component is also used to obtain real-time water supply data, and based on the real-time water supply data, to activate at least one water supply component in the water supply control component from the remaining water supply components, and to input the processed cooling water to the user terminal.

[0015] Another technical solution of the present invention to solve the above-mentioned technical problems is as follows: A control method for an air conditioning refrigeration system, comprising:

[0016] Import cooling demand parameters and generate a start command, wherein the cooling demand parameters include cooling demand temperature data;

[0017] According to the start command, real-time temperature data is obtained from the cooling control component. When the real-time temperature data is greater than the cooling demand temperature data, a first cooling start command, a first return water start command, and a first water supply start command are generated.

[0018] At least one cooling component is activated according to the first cooling start command, any one return water component is activated according to the first return water start command, and any one water supply component is activated according to the first water supply start command.

[0019] Once the preset time is reached, real-time cooling data is obtained, and at least one cooling component is activated from the remaining cooling components based on the real-time cooling data and the cooling demand parameters.

[0020] The system connects the water to be cooled to the user terminal and activates at least one return water component from the remaining return water components based on at least one cooling component.

[0021] Obtain real-time water supply data, and based on the real-time water supply data, activate at least one water supply component from the remaining water supply components in the water supply control component, and input the processed cooling water to the user terminal.

[0022] Another technical solution of the present invention to solve the above-mentioned technical problems is as follows: a control device for an air conditioning refrigeration system, comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein when the processor executes the computer program, the control method for the air conditioning refrigeration system as described above is implemented.

[0023] Another technical solution of the present invention to solve the above-mentioned technical problems is as follows: a computer-readable storage medium storing a computer program, which, when executed by a processor, implements the control method for an air conditioning refrigeration system as described above.

[0024] The beneficial effects of this invention are as follows: Real-time temperature data is obtained from the cooling control component through a start command. When the real-time temperature data is greater than the cooling demand temperature data, at least one cooling component, any one return water component, and any one supply water component are activated. After a preset time is reached, real-time cooling data is obtained. Based on the real-time cooling data and the cooling demand parameters, at least one cooling component is activated from the remaining cooling components. Cooling water is connected from the user terminal. Based on the at least one cooling component, at least one return water component is activated from the remaining return water components. Based on the real-time water supply data, at least one supply water component from the remaining water supply control component is activated. The processed cooling water is then input to the user terminal. This solves the problem of insufficient cooling supply and over-distribution caused by the inability to predict and control the cooling load, thus improving production efficiency and achieving fully automated control. Attached Figure Description

[0025] Figure 1 This is a block diagram of a control device for an air conditioning refrigeration system provided in an embodiment of the present invention;

[0026] Figure 2 This is a structural block diagram of a control device for an air conditioning refrigeration system provided in an embodiment of the present invention;

[0027] Figure 3 This is a flowchart illustrating a control method for an air conditioning refrigeration system according to an embodiment of the present invention.

[0028] In the attached diagram, the component names represented by each label are as follows:

[0029] 1. Control terminal; 2. Centralized control component; 3. Cooling water pump control component; 4. Cooling tower control component; 5. First cooling temperature sensor; 6. Second cooling temperature sensor; 7. Cooling water group; 8. Cooling tower; 9. Cooling water pump; 10. First cooling pressure sensor; 11. Cooling flow sensor; 12. Second cooling pressure sensor; 13. Return water tank; 14. Return water pump control component; 15. Return water pump; 16. Return water flow sensor; 17. Return water pressure sensor; 18. Return water temperature sensor; 19. Supply water tank; 20. Supply water pump control component; 21. Supply water pressure sensor; 22. Supply water temperature sensor; 23. Supply water pump; 24. Energy meter; 25. Electricity meter. Detailed Implementation

[0030] The principles and features of the present invention are described below with reference to the accompanying drawings. The examples given are only for explaining the present invention and are not intended to limit the scope of the present invention.

[0031] Figure 1 This is a block diagram of a control device for an air conditioning refrigeration system provided in an embodiment of the present invention.

[0032] like Figure 1 As shown, a control device for an air conditioning refrigeration system includes a control terminal 1, a centralized control component 2, a cooling control component, a return water control component, and a supply water control component.

[0033] The control terminal 1 is connected to the centralized control component 2. The centralized control component 2 is connected to the cooling control component, the return water control component, and the supply water control component. The return water control component is connected to the cooling control component and the user terminal. The supply water control component is connected to the cooling control component and the user terminal.

[0034] The control terminal 1 is used to import cooling demand parameters and generate a start command. The cooling demand parameters include cooling demand temperature data.

[0035] The centralized control component 2 is also used to obtain real-time temperature data from the cooling control component according to the start command. When the real-time temperature data is greater than the cooling demand temperature data, a first cooling start command, a first return water start command, and a first water supply start command are generated.

[0036] The cooling control component is used to activate at least one cooling component according to the first cooling activation command;

[0037] The water return control component is used to activate any one of the water return components according to the first water return activation command;

[0038] The water supply control component is used to activate any one of the water supply components according to the first water supply activation command.

[0039] The cooling control component is also used to obtain real-time cooling data after a preset time has elapsed, and to activate at least one cooling component from the remaining cooling components based on the real-time cooling data and the cooling demand parameters.

[0040] The return water control component is also used to access the water to be cooled from the user terminal, and to activate at least one return water component from the remaining return water components according to at least one cooling component.

[0041] The water supply control component is also used to obtain real-time water supply data, and based on the real-time water supply data, to activate at least one water supply component in the water supply control component from the remaining water supply components, and to input the processed cooling water to the user terminal.

[0042] Preferably, the control terminal 1 can be a computer, and the centralized control component 2 can be a centralized control cabinet.

[0043] It should be understood that the centralized control unit 2 is also used to start timing directly without generating an instruction when the real-time temperature data is equal to the cooling demand temperature data.

[0044] It should be understood that "at least one" means at least one, but it can also mean two, three, etc., which can be understood as one or more. "Any one" means to choose one arbitrarily from a large number of options, or to choose one randomly.

[0045] It should be understood that the remaining cooling components refer to the cooling components other than the cooling components activated according to the first cooling start command, the remaining return water components refer to the return water components other than the return water components activated according to the first return water start command, and the remaining water supply components refer to the water supply components other than the water supply components activated according to the first water supply start command.

[0046] Specifically, the computer (i.e., the control terminal 1) sends a start command to the central control cabinet (i.e., the central control component 2). Upon receiving the command, the central control cabinet (i.e., the central control component 2) compares the preset chilled water temperature (i.e., the cooling demand temperature data) with the existing temperature data (i.e., the real-time temperature data) to determine whether to start the chiller unit (i.e., the cooling component). If the existing temperature (i.e., the real-time temperature data) is greater than the preset temperature (i.e., the cooling demand temperature data), one chiller unit (i.e., the cooling component) is started first (with a 5-minute delay). A cooling water pump (i.e., the cooling component) starts immediately upon receiving the chiller unit start signal (i.e., the first cooling start command), and a cooling tower (i.e., the cooling component) is started simultaneously. A primary water pump (i.e., the return water control component) and a secondary water pump (i.e., the supply water control component) are also started simultaneously.

[0047] In the above embodiments, real-time temperature data is obtained from the cooling control component via a start command. When the real-time temperature data is greater than the cooling demand temperature data, at least one cooling component, any one return water component, and any one supply water component are activated. After a preset time is reached, real-time cooling data is obtained. Based on the real-time cooling data and the cooling demand parameters, at least one cooling component is activated from the remaining cooling components, and the water to be cooled is connected from the user terminal. Based on the at least one cooling component, at least one return water component is activated from the remaining return water components. Based on the real-time water supply data, at least one supply water component from the remaining water supply control component is activated, and the processed cooling water is input to the user terminal. This solves the problem of insufficient cooling supply and over-distribution caused by the inability to predict and control the cooling load, thus improving production efficiency and achieving fully automated control.

[0048] Optionally, as an embodiment of the present invention, such as Figure 1 and 2 As shown, the cooling control assembly includes a cooling water pump control component 3, a cooling tower control component 4, a first cooling temperature sensor 5, a second cooling temperature sensor 6, and multiple cooling components, including a cooling water assembly 7, a cooling tower 8, and a cooling water pump 9.

[0049] The centralized control component 2 is connected to the cooling water pump control component 3 and the cooling tower control component 4 respectively. The cooling water pump control component 3 is connected to multiple cooling towers 8. The cooling tower control component 4 is connected to multiple cooling water pumps 9 respectively. The multiple cooling water pumps 9 are connected to multiple cooling water groups 7 and multiple cooling towers 8 respectively. The multiple cooling water groups 7 are connected to the first cooling temperature sensor 5, the return water control component and the supply water control component respectively. The first cooling temperature sensor 5 is connected to the second cooling temperature sensor 6. The second cooling temperature sensor 6 is connected to multiple cooling towers 8.

[0050] The centralized control component 2 is used to obtain first real-time cooling temperature data from the first cooling temperature sensor 5 and second real-time cooling temperature data from the second cooling temperature sensor 6 according to the start command.

[0051] Calculate the difference between the first real-time cooling temperature data and the second real-time cooling temperature data to obtain the real-time temperature data;

[0052] When the real-time temperature data is greater than the cooling demand temperature data, a first cooling start command is generated. The first cooling start command includes a first cooling water group start command, a first cooling tower start command, and a first cooling water pump start command.

[0053] According to the first cooling water group opening command, control any one of the multiple cooling water groups 7 to open;

[0054] The cooling tower control component 4 is used to control any one of the plurality of cooling towers 8 to be turned on according to the first cooling tower turn-on command.

[0055] The cooling water pump control component 3 is used to control any one of the plurality of cooling water pumps 9 to start according to the first cooling water pump start command.

[0056] Preferably, the cooling water pump control component 3 can be a cooling water pump control cabinet, and the cooling tower control component 4 can be a cooling tower control cabinet.

[0057] In the above embodiments, real-time temperature data is obtained by calculating the difference between the first real-time cooling temperature data and the second real-time cooling temperature data. When the real-time temperature data is greater than the cooling demand temperature data, any one of the multiple cooling water groups, any one of the multiple cooling towers, and any one of the multiple cooling water pumps are controlled to start. This solves the problem that the cooling load cannot be predicted and controlled, which can easily lead to insufficient cooling supply and excessive distribution.

[0058] Optionally, as an embodiment of the present invention, the cooling demand parameters further include cooling pressure data and cooling flow rate data, and the cooling control component further includes a first cooling pressure sensor 10, a cooling flow rate sensor 11, and a second cooling pressure sensor 12.

[0059] The first cooling pressure sensor 10 is connected to the first cooling temperature sensor 5 and the cooling flow sensor 11 respectively, and the second cooling pressure sensor 12 is connected to the cooling flow sensor 11 and the second cooling temperature sensor 6 respectively.

[0060] The first cooling temperature sensor 5 is used to obtain third real-time cooling temperature data after a preset time has elapsed;

[0061] The second cooling temperature sensor 6 is used to obtain fourth real-time cooling temperature data after the preset time is reached;

[0062] The centralized control component 2 is used to calculate the difference between the third real-time cooling temperature data and the fourth real-time cooling temperature data to obtain the real-time cooling temperature difference.

[0063] The first cooling pressure sensor 10 is used to acquire first real-time cooling pressure data;

[0064] The second cooling pressure sensor 12 is used to acquire second real-time cooling pressure data;

[0065] The centralized control component 2 is also used to calculate the difference between the first real-time cooling pressure data and the second real-time cooling pressure data to obtain the real-time cooling pressure difference.

[0066] The cooling flow sensor 11 is used to acquire real-time cooling flow data;

[0067] The centralized control component 2 is also used to generate a second cooling water group start command when the real-time cooling temperature difference is greater than the cooling demand temperature data.

[0068] According to the second cooling water group opening command, control any one of the remaining multiple cooling water groups 7 to open;

[0069] When the real-time cooling pressure difference is less than the cooling pressure data and / or the real-time cooling flow data is less than the cooling flow data, a second cooling tower start command and a second cooling water pump start command are generated.

[0070] The real-time cooling data includes the real-time cooling temperature difference, the real-time cooling pressure difference, and the real-time cooling flow rate data;

[0071] The cooling tower control component 4 is used to control any one of the remaining multiple cooling towers 8 to be turned on according to the second cooling tower turn-on command;

[0072] The cooling water pump control component 3 is used to turn on any one of the remaining multiple cooling water pumps 9 according to the second cooling water pump start command.

[0073] It should be understood that any of the remaining plurality of cooling water groups 7 refers to any cooling water group 7 other than the cooling water group 7 activated according to the first cooling water group activation command.

[0074] It should be understood that any one of the remaining plurality of cooling towers 8 refers to any cooling tower 8 other than the cooling tower 8 that is activated according to the first cooling tower activation command.

[0075] It should be understood that any of the remaining plurality of cooling water pumps 9 refers to any cooling water pump 9 other than the cooling water pump 9 that is turned on according to the first cooling water pump start command.

[0076] Specifically, when the temperature difference between the outlet water temperature of the chiller unit and the set temperature does not decrease significantly after a period of time (i.e., when the real-time cooling temperature difference is greater than the cooling demand temperature data), another chiller unit is started. The required cooling water flow rate (i.e., the cooling flow rate data) and the temperature difference between the inlet and outlet cooling water (i.e., the cooling demand temperature data) will also be preset to determine whether to start the cooling water pump 9 and the cooling tower 8 again.

[0077] The above embodiments realize intelligent, stable, and energy-saving supply to the system, and also solve the problems of high energy consumption caused by manual control of equipment.

[0078] Optionally, as an embodiment of the present invention, the return water control component includes a return water tank 13, a return water pump control component 14, and a plurality of return water components, wherein the return water component includes a return water pump 15, and the cooling component includes a cooling water assembly 7.

[0079] The return water tank 13 is connected to the user terminal. The return water tank 13 is connected to a plurality of return water pumps 15. The return water pump control component 14 is connected to the centralized control component 2, the cooling control component and the water supply control component. The return water pump control component 14 is connected to a plurality of return water pumps 15 respectively. The plurality of return water pumps 15 are connected to at least one cooling water group 7.

[0080] The centralized control unit 2 is used to perform frequency conversion control through PID algorithm and at least one cooling water group 7 to generate a second return water start command.

[0081] The return water pump control component 14 is used to control at least one remaining return water pump 15 to start according to the second return water start command.

[0082] Preferably, the return water pump control component 14 can be a return water pump control cabinet, and the return water pump 15 can be a primary water pump.

[0083] It should be understood that the remaining at least one return water pump 15 refers to any return water pump 15 other than the return water pump 15 activated according to the first return water activation command.

[0084] Specifically, the PID algorithm refers to the PID controller (also known as a PID regulator), which controls the process according to the proportional (P), integral (I), and derivative (D) of the deviation. It is one of the most widely used automatic controllers. It has advantages such as simple principle, ease of implementation, wide applicability, independent control parameters, and relatively simple parameter selection. Furthermore, it can be theoretically proven that for typical process control objects—"first-order lag + pure lag" and "second-order lag + pure lag"—the PID controller is an optimal control. The PID regulation law is an effective method for dynamic quality correction of continuous systems; its parameter tuning is simple, and its structure can be flexibly changed (PI, PD, ...).

[0085] Specifically, the primary water pump (i.e., the return water pump 15) is controlled by frequency conversion to meet the flow rate and temperature requirements of the number of chiller units (i.e., the cooling water group 7) in operation.

[0086] It should be understood that the PID algorithm is used to generate an instruction for the number of corresponding return water pumps 15 to be turned on based on the number of cooling water groups 7, and the generated instruction is the second return water start instruction.

[0087] The above embodiments greatly reduce the need for personnel operation and intervention control, realize unmanned operation on site, save labor costs, and ensure production supply and stability.

[0088] Optionally, as an embodiment of the present invention, the return water assembly further includes a return water flow sensor 16, a return water pressure sensor 17, and a return water temperature sensor 18; the water supply control assembly includes a water supply tank 19, a water supply pump control component 20, a water supply pressure sensor 21, a water supply temperature sensor 22, and multiple water supply pumps 23.

[0089] The return water flow sensor 16 is connected to the user terminal and the return water pressure sensor 17 respectively. The return water temperature sensor 18 is connected to the return water pressure sensor 17 and the return water tank 13 respectively. The water supply tank 19 is connected to at least one cooling water group 7. The plurality of water supply pumps 23 are connected to the water supply tank 19, the water supply pump control component 20 and the water supply pressure sensor 21 respectively. The water supply pump control component 20 is connected to the centralized control component 2, the cooling control component and the return water control component. The water supply temperature sensor 22 is connected to the water supply pressure sensor 21 and the user terminal respectively.

[0090] The return water flow sensor 16 is used to obtain real-time return water flow data;

[0091] The return water pressure sensor 17 is used to obtain real-time return water pressure data;

[0092] The return water temperature sensor 18 is used to obtain real-time return water temperature data;

[0093] The water supply pressure sensor 21 is used to obtain real-time water supply pressure data;

[0094] The water supply temperature sensor 22 is used to obtain real-time water supply temperature data;

[0095] The centralized control component 2 is used to calculate the difference between the real-time return water pressure data and the real-time supply water pressure data to obtain the real-time supply and return water pressure difference.

[0096] Calculate the difference between the real-time return water temperature data and the real-time supply water temperature data to obtain the real-time supply and return water temperature difference.

[0097] The real-time water supply data includes the real-time return water flow rate data, the real-time supply and return water pressure difference, and the real-time supply and return water temperature difference;

[0098] The second water supply start command is generated by frequency conversion control using the PID algorithm, the real-time return water flow data, the real-time supply and return water pressure difference, and the real-time supply and return water temperature difference.

[0099] The water supply pump control component 20 is used to control at least one remaining water supply pump 23 to start according to the second water supply start command.

[0100] It should be understood that the water supply pump 23 can be a secondary water pump.

[0101] It should be understood that the remaining at least one water supply pump 23 refers to any water supply pump 23 other than the water supply pump 23 activated according to the first water supply start command.

[0102] Specifically, the PID algorithm refers to the PID controller (also known as a PID regulator), which controls the process according to the proportional (P), integral (I), and derivative (D) of the deviation. It is one of the most widely used automatic controllers. It has advantages such as simple principle, ease of implementation, wide applicability, independent control parameters, and relatively simple parameter selection. Furthermore, it can be theoretically proven that for typical process control objects—"first-order lag + pure lag" and "second-order lag + pure lag"—the PID controller is an optimal control. The PID regulation law is an effective method for dynamic quality correction of continuous systems; its parameter tuning is simple, and its structure can be flexibly changed (PI, PD, ...).

[0103] It should be understood that the control of the secondary water pump (i.e., the water supply pump 23) is achieved through frequency conversion control of the outlet and return water pressure difference (i.e., the real-time supply and return water pressure difference), temperature (i.e., the real-time supply and return water temperature difference), and flow rate (i.e., the real-time return water flow rate data) of the secondary water pump (i.e., the water supply pump 23).

[0104] Specifically, the PID algorithm is used to generate an instruction for the number of water pumps 23 to be turned on based on the real-time return water flow data, the real-time supply and return water pressure difference, and the real-time supply and return water temperature difference. The generated instruction is the second water supply start instruction.

[0105] The above embodiments greatly reduce the need for personnel operation and intervention control, realize unmanned operation on site, save labor costs, and ensure production supply and stability.

[0106] Optionally, as an embodiment of the present invention, the centralized control component 2 is further configured to:

[0107] When the real-time cooling temperature data is lower than the cooling demand temperature data, a cooling water group shutdown command is generated;

[0108] The cooling water group shutdown command controls any one of the multiple cooling water groups 7 to be shut down.

[0109] It should be understood that when the chilled water outlet temperature (i.e., the real-time cooling temperature data) is lower than the preset value (i.e., the cooling demand temperature data) for a period of time (configurable), one chiller unit (i.e., the cooling water group 7) will be shut down.

[0110] In the above embodiments, intelligent temperature control is realized, which greatly saves personnel operation and intervention, realizes unmanned operation on site, saves labor costs, and ensures production supply and stability.

[0111] Optionally, as an embodiment of the present invention, the control device of the air conditioning refrigeration system further includes an energy meter 24, which is connected to the water supply tank 19 and the plurality of cooling water groups 7 respectively.

[0112] In the above embodiments, more thermal energy data can be obtained, and the thermal energy usage can be monitored, thus solving the problem of high energy consumption due to manual control of the equipment.

[0113] Optionally, as an embodiment of the present invention, the control device of the air conditioning refrigeration system further includes an electricity meter 25, which is connected to the centralized control component 2.

[0114] In the above embodiments, more power data can be obtained, and power usage can be monitored, thus solving the problem of high energy consumption due to manual control of the equipment.

[0115] Optionally, as another embodiment of the present invention, the steps of the present invention include: after the host computer sets the cooling demand parameters, it clicks the system automatic operation button. The system collects various temperature, pressure, and flow data in real time, automatically starts the cooling water pump to draw water from the cooling water tank to circulate to the chiller unit for cooling, automatically adjusts the frequency according to the pressure difference between the inlet and outlet water, then starts the cooling tower fan. The number of fans started and the frequency are automatically adjusted according to the collected outdoor temperature and humidity data and the temperature difference between the inlet and outlet water. Then, the primary chilled water pump is started to draw water from the chilled water tank to circulate to the chiller unit for cooling, and then the chiller unit is automatically started. The secondary chilled water pump circulates and supplies chilled water to the user.

[0116] Optionally, as another embodiment of the present invention, the objective of this invention is to address the shortcomings of existing control technologies by inventing a fully automatic control system. This system provides intelligent, energy-saving, and automatic control for chiller units, chilled water transfer pumps, cooling water pumps, and cooling tower fans. It achieves intelligent, stable, and energy-efficient supply to the utility system, solving the problems of high energy consumption associated with manual equipment control.

[0117] Optionally, as another embodiment of the present invention, a centralized control cabinet is added, and a programmable logic controller (PLC) is used to intelligently control the chiller, water pumps, cooling towers, electric valves, etc., according to a set energy-saving strategy. Through the intelligent control of the PLC, data analysis and logical operations are performed on the intelligent instruments, and the water pumps and electric valves are intelligently controlled using a PID algorithm. The chiller, based on the user's energy consumption data and the inlet / outlet temperature difference, intelligently calculates the number of units to be started and automatically adjusts the load according to the cooling capacity of each unit. This achieves intelligent switching and energy-saving operation of the chiller units.

[0118] Optionally, as another embodiment of the present invention, the present invention adds a cooling tower intelligent control cabinet, and adds a cooling tower fan frequency converter and a cooling tower inlet water pipe electric valve. The PLC analyzes the outdoor ambient temperature and humidity, the inlet and outlet water temperatures, and the required cooling water flow of the chiller unit to intelligently adjust the number of cooling tower fans started, start and stop, operating frequency, and electric valve opening and closing. By intelligently adjusting the unit's power consumption and the overall COP of the machine room, the overall power consumption is optimized.

[0119] Optionally, as another embodiment of the present invention, the present invention adds a host computer remote monitoring system, which performs remote monitoring, control, data analysis, report generation and other tasks on equipment such as cold source room equipment, water manifold, water pump, cooling tower, etc., to realize one-click start and stop of the unit, and real-time monitoring, data recording, data analysis, and unattended operation of the room.

[0120] Optionally, as another embodiment of the present invention, the present invention improves the functions of cooling capacity metering and energy consumption metering, that is, by adding a chilled water main pipe flow meter, and matching it with supply and return water temperature sensors to meter the cooling capacity of the system, and by connecting the metering data of smart meters of equipment such as the host, water pump, and cooling tower to calculate the total power consumption of the system.

[0121] Alternatively, as another embodiment of the present invention, the beneficial effects of the present invention are as follows:

[0122] 1. Automatic operation of the equipment

[0123] Through automation upgrades, operators can start the chiller unit, cooling tower, cooling water pump, and chilled water pump with a single click on a computer. The chiller unit, cooling tower, cooling water pump, and chilled water pump operate automatically according to their own logical sequence, greatly reducing the need for manual operation and control. This achieves unmanned operation on-site, saves labor costs, and ensures production supply and stability.

[0124] 2. Instrument Data Recording and Energy Analysis

[0125] After the upgrade, all data from the unit and instruments are collected into the control computer, enabling the recording and trend analysis of data such as temperature, pressure, and electricity. Anomalies in the data are readily traceable, ensuring well-founded and accurate event analysis. Energy consumption data is clearly presented, providing a basis for energy conservation strategies.

[0126] Alternatively, as another embodiment of the present invention, the key technical points of the present invention are as follows:

[0127] 1. Interlocking operation control of main unit, water pump, and valves:

[0128] When any host needs to be started, the controller will automatically open the valve of the corresponding host and start the corresponding chilled water primary pump and cooling water pump according to the minimum cumulative flow value required to start the host. After the pumps start normally, the host will start. When a host stops, the cooling water pump and chilled water primary pump will reduce their frequency or shut down after a certain delay (the delay time is adjustable) according to the decrease in the host's flow demand, but at least one will be kept running. The chilled water secondary pump will ensure the stable operation of the pipeline network according to fuzzy control logic.

[0129] 2. Automatic optimization and energy-saving control of the system:

[0130] The energy consumption relationships among the main unit, chilled water pumps, cooling water pumps, and cooling tower fans in the computer room are coupled nonlinearly. Adjusting the operating state of one device cannot be expressed as a simple mathematical derivation of the relationship between the operating states of the other devices. In this case, fuzzy control algorithms and active optimization control strategies can bypass the complex intermediate relationships and maintain the optimal COP of the entire chiller room during the adjustment process based on historical databases and self-learning functions.

[0131] 3. Generator unit optimization and load control:

[0132] Based on the chilled water system monitoring data and outdoor temperature and humidity monitoring data, the total load rate of the computer room is predicted. According to the capacity configuration and partial load performance of each main unit, the main units with high single-unit load rates and high partial load energy efficiency ratios are prioritized. If dual-head main units are selected, the compressors with higher single-head load rates are prioritized for operation. After the main units complete the start-up process and output the corresponding cooling capacity, the system load rate and the single-unit / single-head load rate are calculated. An appropriate combination method is selected based on the system load rate and the single-unit / single-head load rate.

[0133] 4. Host load balancing control:

[0134] The system accumulates the operating time of each main unit and, among units with the same performance, automatically selects the main unit with the shortest operating time to start first and automatically selects the main unit with the longest operating time to stop first. This ensures even wear on each main unit, thereby extending the overall service life of the unit.

[0135] 5. Frequency conversion and number of operation control for cooling tower fans:

[0136] Adjusting the number of opening electric valves on the cooling tower fan and water inlet pipe, as well as the fan frequency, keeps the cooling water supply temperature close to the set value, maximizing the cooling function of the cooling tower, reducing the cooling water supply temperature, and thus improving the main unit's energy efficiency. For every 1°C increase in cooling water supply temperature, the overall system energy efficiency improves by 2% to 3%.

[0137] Figure 3This is a flowchart illustrating a control method for an air conditioning refrigeration system provided in an embodiment of the present invention.

[0138] Alternatively, as another embodiment of the present invention, such as Figure 3 As shown, a control method for an air conditioning refrigeration system includes:

[0139] Import cooling demand parameters and generate a start command, wherein the cooling demand parameters include cooling demand temperature data;

[0140] According to the start command, real-time temperature data is obtained from the cooling control component. When the real-time temperature data is greater than the cooling demand temperature data, a first cooling start command, a first return water start command, and a first water supply start command are generated.

[0141] At least one cooling component is activated according to the first cooling start command, any one return water component is activated according to the first return water start command, and any one water supply component is activated according to the first water supply start command.

[0142] Once the preset time is reached, real-time cooling data is obtained, and at least one cooling component is activated from the remaining cooling components based on the real-time cooling data and the cooling demand parameters.

[0143] The system connects the water to be cooled to the user terminal and activates at least one return water component from the remaining return water components based on at least one cooling component.

[0144] Obtain real-time water supply data, and based on the real-time water supply data, activate at least one water supply component from the remaining water supply components in the water supply control component, and input the processed cooling water to the user terminal.

[0145] Optionally, another embodiment of the present invention provides a control device for an air conditioning refrigeration system, including a memory, a processor, and a computer program stored in the memory and executable on the processor. When the processor executes the computer program, it implements the control method for the air conditioning refrigeration system as described above. This device may be a computer or similar device.

[0146] Optionally, another embodiment of the present invention provides a computer-readable storage medium storing a computer program that, when executed by a processor, implements the control method for an air conditioning refrigeration system as described above.

[0147] Those skilled in the art will clearly understand that, for the sake of convenience and brevity, the specific working process of the above-described apparatus and unit can be referred to the corresponding process in the foregoing method embodiments, and will not be repeated here.

[0148] In the several embodiments provided in this application, it should be understood that the disclosed apparatus and methods can be implemented in other ways. For example, the apparatus embodiments described above are merely illustrative. For instance, the division of units is only a logical functional division, and in actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed.

[0149] The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the units can be selected to achieve the purpose of the embodiments of the present invention, depending on actual needs.

[0150] Furthermore, the functional units in the various embodiments of the present invention can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit. The integrated unit can be implemented in hardware or as a software functional unit.

[0151] If the integrated unit is implemented as a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. This is understood to mean that the technical solution of the present invention, in essence, or the part that contributes to the prior art, or all or part of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods of the various embodiments of the present invention. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, portable hard drives, read-only memory (ROM), random access memory (RAM), magnetic disks, or optical disks.

[0152] The above are merely specific embodiments of the present invention, but the scope of protection of the present invention is not limited thereto. Any person skilled in the art can easily conceive of various equivalent modifications or substitutions within the technical scope disclosed in the present invention, and these modifications or substitutions should all be covered within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. A control device for an air conditioning refrigeration system, characterized in that, It includes a control terminal (1), a centralized control component (2), a cooling control component, a return water control component, and a water supply control component. The control terminal (1) is connected to the centralized control component (2), the centralized control component (2) is connected to the cooling control component, the return water control component and the water supply control component respectively, the return water control component is connected to the cooling control component and the user terminal respectively, and the water supply control component is connected to the cooling control component and the user terminal respectively. The control terminal (1) is used to import cooling demand parameters and generate start commands. The cooling demand parameters include cooling demand temperature data. The centralized control component (2) is also used to obtain real-time temperature data from the cooling control component according to the start command. When the real-time temperature data is greater than the cooling demand temperature data, a first cooling start command, a first return water start command and a first water supply start command are generated. The cooling control component is used to activate at least one cooling component according to the first cooling activation command; The water return control component is used to activate any one of the water return components according to the first water return activation command; The water supply control component is used to activate any one of the water supply components according to the first water supply activation command. The cooling control component is also used to obtain real-time cooling data after a preset time has elapsed, and to activate at least one cooling component from the remaining cooling components based on the real-time cooling data and the cooling demand parameters. The return water control component is also used to access the water to be cooled from the user terminal, and to activate at least one return water component from the remaining return water components according to the second return water activation command generated by at least one cooling component. The water supply control component is also used to obtain real-time water supply data, and according to the real-time water supply data, to activate at least one water supply component in the water supply control component from the remaining water supply components, and to input the processed cooling water to the user terminal. The cooling control assembly includes a cooling water pump control unit (3), a cooling tower control unit (4), a first cooling temperature sensor (5), a second cooling temperature sensor (6), and multiple cooling components, including a cooling water group (7), a cooling tower (8), and a cooling water pump (9). The centralized control component (2) is connected to the cooling water pump control component (3) and the cooling tower control component (4) respectively. The cooling water pump control component (3) is connected to multiple cooling towers (8). The cooling tower control component (4) is connected to multiple cooling water pumps (9). The multiple cooling water pumps (9) are connected to multiple cooling water groups (7) and multiple cooling towers (8) respectively. The multiple cooling water groups (7) are connected to the first cooling temperature sensor (5), the return water control component and the water supply control component respectively. The first cooling temperature sensor (5) is connected to the second cooling temperature sensor (6). The second cooling temperature sensor (6) is connected to multiple cooling towers (8). The centralized control unit (2) is used to obtain first real-time cooling temperature data from the first cooling temperature sensor (5) and second real-time cooling temperature data from the second cooling temperature sensor (6) according to the start command; Calculate the difference between the first real-time cooling temperature data and the second real-time cooling temperature data to obtain the real-time temperature data; When the real-time temperature data is greater than the cooling demand temperature data, a first cooling start command is generated. The first cooling start command includes a first cooling water group start command, a first cooling tower start command, and a first cooling water pump start command. According to the first cooling water group opening command, control any one of the multiple cooling water groups (7) to open; The cooling tower control component (4) is used to control any one of the multiple cooling towers (8) to be turned on according to the first cooling tower turn-on command; The cooling water pump control component (3) is used to control any one of the multiple cooling water pumps (9) to start according to the first cooling water pump start command.

2. The control device for an air conditioning refrigeration system according to claim 1, characterized in that, The cooling demand parameters also include cooling pressure data and cooling flow rate data. The cooling control component also includes a first cooling pressure sensor (10), a cooling flow rate sensor (11), and a second cooling pressure sensor (12). The first cooling pressure sensor (10) is connected to the first cooling temperature sensor (5) and the cooling flow sensor (11) respectively, and the second cooling pressure sensor (12) is connected to the cooling flow sensor (11) and the second cooling temperature sensor (6) respectively. The first cooling temperature sensor (5) is used to obtain the third real-time cooling temperature data after a preset time has elapsed; The second cooling temperature sensor (6) is used to obtain fourth real-time cooling temperature data after the preset time is reached; The centralized control component (2) is used to calculate the difference between the third real-time cooling temperature data and the fourth real-time cooling temperature data to obtain the real-time cooling temperature difference. The first cooling pressure sensor (10) is used to acquire first real-time cooling pressure data; The second cooling pressure sensor (12) is used to acquire second real-time cooling pressure data; The centralized control component (2) is also used to calculate the difference between the first real-time cooling pressure data and the second real-time cooling pressure data to obtain the real-time cooling pressure difference. The cooling flow sensor (11) is used to acquire real-time cooling flow data; The centralized control component (2) is also used to generate a second cooling water group start command when the real-time cooling temperature difference is greater than the cooling demand temperature data; According to the second cooling water group opening command, control any one of the remaining multiple cooling water groups (7) to open; When the real-time cooling pressure difference is less than the cooling pressure data and / or the real-time cooling flow data is less than the cooling flow data, a second cooling tower start command and a second cooling water pump start command are generated. The real-time cooling data includes the real-time cooling temperature difference, the real-time cooling pressure difference, and the real-time cooling flow rate data; The cooling tower control component (4) is used to control any one of the remaining multiple cooling towers (8) to be turned on according to the second cooling tower turn-on command; The cooling water pump control unit (3) is used to turn on any one of the remaining multiple cooling water pumps (9) according to the second cooling water pump start command.

3. The control device for an air conditioning refrigeration system according to claim 1, characterized in that, The return water control component includes a return water tank (13), a return water pump control component (14), and multiple return water components. The return water component includes a return water pump (15), and the cooling component includes a cooling water group (7). The return water tank (13) is connected to the user terminal. The return water tank (13) is connected to multiple return water pumps (15). The return water pump control component (14) is connected to the centralized control component (2), the cooling control component, and the water supply control component. The return water pump control component (14) is connected to multiple return water pumps (15) respectively. The multiple return water pumps (15) are connected to at least one cooling water group (7). The centralized control unit (2) is used to perform frequency conversion control through PID algorithm and at least one cooling water group (7) to generate a second return water start command; The return water pump control unit (14) is used to control at least one remaining return water pump (15) to start according to the second return water start command.

4. The control device for an air conditioning refrigeration system according to claim 3, characterized in that, The return water assembly also includes a return water flow sensor (16), a return water pressure sensor (17), and a return water temperature sensor (18). The water supply control assembly includes a water supply tank (19), a water supply pump control component (20), a water supply pressure sensor (21), a water supply temperature sensor (22), and multiple water supply pumps (23). The return water flow sensor (16) is connected to the user terminal and the return water pressure sensor (17) respectively. The return water temperature sensor (18) is connected to the return water pressure sensor (17) and the return water tank (13) respectively. The water supply tank (19) is connected to at least one cooling water group (7). Multiple water supply pumps (23) are connected to the water supply tank (19), the water supply pump control component (20) and the water supply pressure sensor (21) respectively. The water supply pump control component (20) is connected to the centralized control component (2), the cooling control component and the return water control component. The water supply temperature sensor (22) is connected to the water supply pressure sensor (21) and the user terminal respectively. The return water flow sensor (16) is used to obtain real-time return water flow data; The return water pressure sensor (17) is used to obtain real-time return water pressure data; The return water temperature sensor (18) is used to obtain real-time return water temperature data; The water supply pressure sensor (21) is used to obtain real-time water supply pressure data; The water supply temperature sensor (22) is used to obtain real-time water supply temperature data; The centralized control component (2) is used to calculate the difference between the real-time return water pressure data and the real-time supply water pressure data to obtain the real-time supply and return water pressure difference. Calculate the difference between the real-time return water temperature data and the real-time supply water temperature data to obtain the real-time supply and return water temperature difference. The real-time water supply data includes the real-time return water flow rate data, the real-time supply and return water pressure difference, and the real-time supply and return water temperature difference; The second water supply start command is generated by frequency conversion control using the PID algorithm, the real-time return water flow data, the real-time supply and return water pressure difference, and the real-time supply and return water temperature difference. The water supply pump control unit (20) is used to control at least one remaining water supply pump (23) to start according to the second water supply start command.

5. The control device for an air conditioning refrigeration system according to claim 3, characterized in that, The centralized control component (2) is also used for: When the real-time cooling temperature data is lower than the cooling demand temperature data, a cooling water group shutdown command is generated; According to the cooling water group shutdown command, control any one of the multiple cooling water groups (7) to shut down.

6. The control device for an air conditioning refrigeration system according to claim 4, characterized in that, The control device of the air conditioning refrigeration system also includes an energy meter (24), which is connected to the water supply tank (19) and multiple cooling water groups (7).

7. The control device for an air conditioning refrigeration system according to claim 1, characterized in that, The control device of the air conditioning refrigeration system also includes an electricity meter (25), which is connected to the centralized control component (2).

8. A control method for an air conditioning refrigeration system, comprising the control device for an air conditioning refrigeration system according to any one of claims 1 to 7, characterized in that, include: Import cooling demand parameters and generate a start command, wherein the cooling demand parameters include cooling demand temperature data; According to the start command, real-time temperature data is obtained from the cooling control component. When the real-time temperature data is greater than the cooling demand temperature data, a first cooling start command, a first return water start command, and a first water supply start command are generated. At least one cooling component is activated according to the first cooling start command, any one return water component is activated according to the first return water start command, and any one water supply component is activated according to the first water supply start command. Once the preset time is reached, real-time cooling data is obtained, and at least one cooling component is activated from the remaining cooling components based on the real-time cooling data and the cooling demand parameters. The system connects the water to be cooled to the user terminal and activates at least one return water component from the remaining return water components according to the second return water activation command generated by at least one cooling component. Obtain real-time water supply data, and based on the real-time water supply data, activate at least one water supply component from the remaining water supply components in the water supply control component, and input the processed cooling water to the user terminal.

9. A computer-readable storage medium storing a computer program, characterized in that, When the computer program is executed by the processor, it implements the control method for an air conditioning refrigeration system as described in claim 8.

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