Control method and control device of water chilling unit and water chilling unit

Abstract

The invention provides a control method and device of a water chilling unit and the water chilling unit. The water chilling unit comprises a plurality of water chilling machines connected in parallel and a total water outlet tail end connected with the water chilling machines, and the control method comprises the steps that rated refrigeration parameters of the water chilling machines and the target total water outlet temperature of the total water outlet tail end are obtained; and according to the target total water outlet temperature and the rated refrigeration parameters of all the water cooling machines, the working states of all the water cooling machines are controlled and adjusted, so that all the started water cooling machines are matched with the target total water outlet temperature. According to the control method and device of the water chilling unit and the water chilling unit, the rated refrigeration parameters of the water chilling units and the target temperature of the total water outlet tail end are obtained in real time, the working state of each water chilling unit can be accurately calculated and controlled, and it is ensured that the water chilling units work cooperatively to meet the actual cooling capacity requirement.

Description

Technical Field

[0001] This invention relates to the field of electrical technology, and in particular to a control method, control device, and chiller unit for water chillers. Background Technology

[0002] In related technologies, within a group control system, chiller equipment may include water-cooled magnetic levitation devices, with different chiller units having varying cooling capacities. Water-cooled air-levitation devices may also exist, although their cooling capacity is smaller compared to water-cooled magnetic levitation devices. Additionally, air-cooled modular chiller units may also be included.

[0003] There are two existing technical solutions: one is to determine the start time based on running time, with devices that run for shorter periods being turned on first; the other is to determine the start time based on a specified order, turning on devices in that order.

[0004] However, existing technologies cannot automatically adjust the load on / off of different types of equipment or equipment with different cooling capacities. When the cooling demand at the terminal is not high, existing technologies still start the equipment according to a specified sequence or operating time, leading to overload operation and increased energy consumption on-site, thus failing to achieve true energy-saving operation. In other words, current group control logic cannot automatically adjust the load on different equipment based on on-site cooling demand, resulting in increased energy consumption of the chiller unit and increased operating costs. Summary of the Invention

[0005] This invention provides a control method, control device, and chiller unit for a water chiller, which addresses the deficiencies in the prior art and achieves the following technical effects: By acquiring the rated refrigeration parameters of the chillers and the target temperature of the main outlet water in real time, this invention can accurately calculate and control the working state of each chiller, ensuring that they work together to meet the actual cooling demand.

[0006] According to a first aspect of the present invention, a control method for a chiller unit includes a plurality of chillers connected in parallel and a main water outlet terminal connected thereto. The control method includes:

[0007] Obtain the rated cooling parameters of each of the chillers, and the target total outlet water temperature of the total outlet water terminal;

[0008] Based on the target total outlet water temperature and the rated cooling parameters of each chiller, the operating status of each chiller is controlled and adjusted so that all the chillers that are turned on match the target total outlet water temperature.

[0009] According to an embodiment of the present invention, the step of controlling and adjusting the operating state of each chiller based on the target total outlet water temperature and the rated refrigeration parameters of each chiller, so that all the chillers in operation match the target total outlet water temperature, specifically includes:

[0010] Calculate the target total cooling parameters required for the total outlet water temperature;

[0011] Based on the target total cooling parameters and the rated cooling parameters of each chiller, the operating status of each chiller is controlled and adjusted so that all the chillers that are turned on match the target total cooling parameters.

[0012] According to an embodiment of the present invention, the target total cooling parameter includes a target total cooling capacity, and the rated cooling parameter includes a rated cooling capacity. The step of controlling and adjusting the operating state of each chiller based on the target total cooling parameter and the rated cooling parameters of each chiller, so that all the activated chillers match the target total cooling parameter, specifically includes:

[0013] Based on the target total cooling capacity and the rated cooling capacity of each chiller, determine the chillers that need to be turned on and mark them as chillers to be turned on, and calculate the actual cooling capacity of the chillers to be turned on when they are turned on.

[0014] Each of the chillers to be turned on is controlled to start according to its actual cooling capacity, so that the sum of the actual cooling capacities of all the chillers to be turned on matches the target total cooling capacity.

[0015] According to an embodiment of the present invention, the step of calculating the actual cooling capacity of the chiller to be turned on after it is turned on specifically includes:

[0016] Based on the target total outlet water temperature, determine the high-efficiency range of the cooling capacity of each of the chillers to be turned on;

[0017] Based on the rated cooling capacity and the high-efficiency range of each chiller to be turned on, the actual cooling capacity of each chiller to be turned on when it is turned on is calculated.

[0018] According to one embodiment of the present invention, after the step of controlling each of the chillers to be turned on to start according to their respective actual cooling capacity, the method further includes:

[0019] A default start logic is generated based on each chiller to be turned on and its corresponding actual cooling capacity.

[0020] The operating status of each chiller will be adjusted according to the default startup logic upon the next startup.

[0021] According to an embodiment of the present invention, the target total cooling parameter includes a target total cooling power, and the rated cooling parameter includes a rated cooling power. The step of controlling and adjusting the operating state of each chiller based on the target total cooling parameter and the rated cooling parameter of each chiller, so that all the activated chillers match the target total cooling parameter, specifically includes:

[0022] Based on the target total cooling power and the rated cooling power of each chiller, determine the chillers that need to be turned on and mark them as chillers to be turned on, and calculate the actual cooling power of the chillers to be turned on when they are turned on.

[0023] Each of the chillers to be turned on is controlled to start according to its actual cooling power, so that the sum of the actual cooling power of all the chillers to be turned on matches the target total cooling power.

[0024] According to an embodiment of the present invention, the step of calculating the actual cooling power of the chiller to be turned on after it is turned on specifically includes:

[0025] Based on the target total outlet water temperature, determine the high-efficiency range of the cooling power of each of the chillers to be turned on;

[0026] Based on the rated cooling power and the high-efficiency range of each chiller to be turned on, the actual cooling power of each chiller to be turned on when it is turned on is calculated.

[0027] According to one embodiment of the present invention, after the step of controlling each of the chillers to be turned on to start according to their respective actual cooling power, the method further includes:

[0028] A default start logic is generated based on each chiller to be turned on and its corresponding actual cooling power.

[0029] The operating status of each chiller will be adjusted according to the default startup logic upon the next startup.

[0030] According to an embodiment of the present invention, after the step of controlling and adjusting the operating state of each chiller based on the target total outlet water temperature and the rated refrigeration parameters of each chiller, the method further includes:

[0031] If the target total outlet water temperature changes, the actual cooling parameters of the chiller to be turned on are adjusted in real time according to the changed target total outlet water temperature.

[0032] According to a second aspect of the present invention, a control device for a chiller unit includes a plurality of chillers connected in parallel and a main water outlet terminal connected thereto, the control device comprising:

[0033] The acquisition module is used to acquire the rated refrigeration parameters of each of the chillers and the target total outlet water temperature of the total outlet water terminal;

[0034] The control module is used to control and adjust the working state of each chiller according to the target total outlet water temperature and the rated cooling parameters of each chiller, so that all the chillers that are turned on match the target total outlet water temperature.

[0035] According to a third aspect of the present invention, a chiller unit includes a plurality of chillers connected in parallel and a main water outlet terminal connected thereto, and also includes a memory, a processor and a computer program stored in the memory and executable on the processor. When the processor executes the program, it implements the control method of the chiller unit as described in the first aspect of the present invention.

[0036] This invention provides a control method for a chiller unit, which has at least the following advantages compared to related technologies:

[0037] (1) Precise matching of cooling capacity requirements: By acquiring the rated cooling parameters of the chillers and the target temperature of the main outlet water in real time, this invention can accurately calculate and control the working status of each chiller, ensuring that they work together to meet the actual cooling capacity requirements. This is more flexible and precise compared to the methods in related technologies that start the equipment based on running time or a specified sequence, and avoids unnecessary energy consumption.

[0038] (2) Energy-saving optimization: By intelligently adjusting the working status of the chiller, this invention can ensure that the chiller unit can operate efficiently under different load conditions. This method can reduce energy waste caused by overload or underload, and achieve more economical energy use.

[0039] (3) Improve system reliability: By dynamically adjusting the working state of the chiller, the present invention can better cope with load changes and reduce equipment wear caused by equipment overload or frequent start-stop, thereby improving the reliability and lifespan of the entire system.

[0040] (4) Enhanced system adaptability: Since the present invention can make control decisions based on real-time data, it can better adapt to environmental changes and fluctuations in user demand, ensuring that the chiller unit always operates in the best condition.

[0041] (5) Intelligent control: The control method of the present invention realizes intelligent management of the chiller unit, reduces human intervention, reduces operational complexity, and improves the automation level of the system.

[0042] (6) Reduce operating costs: By optimizing the operation strategy of the chiller, the present invention can not only save energy consumption, but also reduce maintenance costs and downtime, thereby reducing the overall operating costs. Attached Figure Description

[0043] To more clearly illustrate the technical solutions in this invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0044] Figure 1 This is a flowchart illustrating the control method for the chiller unit provided by the present invention;

[0045] Figure 2 This is a schematic diagram of the control device for the chiller unit provided by the present invention;

[0046] Figure 3 This is a schematic diagram of the structure of the electronic device provided by the present invention. Detailed Implementation

[0047] To make the objectives, technical solutions, and advantages of the present invention more clear, the technical solutions of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the embodiments described are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts shall fall within the scope of protection of the present invention.

[0048] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0049] The control method, control device, and chiller unit proposed in this invention are described below with reference to the accompanying drawings. Before detailing the embodiments of this invention, the overall application scenario is described first. The control method, control device, electronic equipment, and computer-readable storage medium of the chiller unit according to the embodiments of this invention can be applied locally to the chiller unit, to cloud platforms in the Internet field, or to other types of cloud platforms in the Internet field, or to third-party devices. These third-party devices may include various types such as mobile phones, tablets, laptops, in-vehicle computers, and other smart terminals.

[0050] The following description uses only the control method applicable to chiller units as an example. It should be understood that the control method of this embodiment can also be applied to cloud platforms and third-party devices. It should also be noted that in the control method of the chiller unit of this invention, the chiller unit includes multiple chillers connected in parallel and a total water outlet terminal connected thereto. That is, the control method of the chiller unit of this invention is applicable to multi-split chiller systems.

[0051] like Figure 1 As shown, a control method for a chiller unit according to a first aspect embodiment of the present invention includes:

[0052] Step S1: Obtain the rated cooling parameters of each chiller and the target total outlet water temperature at the total outlet water terminal;

[0053] Step S2: Based on the target total outlet water temperature and the rated cooling parameters of each chiller, control and adjust the working status of each chiller so that all the chillers that are turned on match the target total outlet water temperature.

[0054] The control method for a chiller unit according to an embodiment of the present invention operates on the following principle: First, the system needs to acquire the rated cooling parameters of each chiller, which typically includes the chiller's cooling capacity and efficiency under standard operating conditions. These parameters are fundamental performance indicators of the chillers and are crucial for subsequent control strategies. Next, the system needs to set a target total outlet water temperature, which is the outlet water temperature that the chiller unit needs to achieve, usually determined by the end-user's needs or the system's design requirements.

[0055] The system will intelligently adjust the operating status of each chiller based on the target total outlet water temperature and the rated cooling parameters of each chiller. This may include starting or stopping the chillers, adjusting the operating frequency, changing the operating mode, etc., to ensure that all operating chillers can work together effectively to achieve the target total outlet water temperature.

[0056] Furthermore, the specific working process of the chiller unit control method is as follows: The system first collects the rated cooling parameters of each chiller and stores this data in the control unit. The system sets a target total outlet water temperature based on user needs or preset standards. The system analyzes the current cooling capacity demand, which may involve real-time monitoring and prediction of the terminal load. The system formulates a control strategy based on the target total outlet water temperature and real-time load demand. This includes determining which chillers need to be turned on and in what state (e.g., full speed, half speed, etc.). The system sends control signals to each chiller to adjust their operating status to match the target total outlet water temperature. The system continuously monitors the operating status and outlet water temperature of the chillers to ensure they always remain consistent with the target total outlet water temperature. If a deviation occurs, the system will automatically adjust the control strategy to maintain temperature stability.

[0057] In this way, through the aforementioned intelligent control methods, chiller units can more efficiently meet the needs of end users while optimizing energy consumption and improving the system's economy and reliability. This method is particularly suitable for large-scale building or industrial applications where multiple chillers need to work collaboratively to meet complex cooling demands.

[0058] In related technologies, within a group control system, chiller equipment may include water-cooled magnetic levitation devices, with different chiller units having varying cooling capacities. Water-cooled air-levitation devices may also exist, although their cooling capacity is smaller compared to water-cooled magnetic levitation devices. Additionally, air-cooled modular chiller units may also be included.

[0059] There are two existing technical solutions: one is to determine the start time based on running time, with devices that run for shorter periods being turned on first; the other is to determine the start time based on a specified order, turning on devices in that order.

[0060] However, existing technologies cannot automatically adjust the load on / off of different types of equipment or equipment with different cooling capacities. When the cooling demand at the terminal is not high, existing technologies still start the equipment according to a specified sequence or operating time, leading to overload operation and increased energy consumption on-site, thus failing to achieve true energy-saving operation. In other words, current group control logic cannot automatically adjust the load on different equipment based on on-site cooling demand, resulting in increased energy consumption of the chiller unit and increased operating costs.

[0061] Therefore, in order to overcome the technical defects existing in the above-mentioned related technologies, the present invention provides a control method for a chiller unit, which has at least the following advantages compared with the related technologies:

[0062] (1) Precise matching of cooling capacity requirements: By acquiring the rated cooling parameters of the chillers and the target temperature of the main outlet water in real time, this invention can accurately calculate and control the working status of each chiller, ensuring that they work together to meet the actual cooling capacity requirements. This is more flexible and precise compared to the methods in related technologies that start the equipment based on running time or a specified sequence, and avoids unnecessary energy consumption.

[0063] (2) Energy-saving optimization: By intelligently adjusting the working status of the chiller, this invention can ensure that the chiller unit can operate efficiently under different load conditions. This method can reduce energy waste caused by overload or underload, and achieve more economical energy use.

[0064] (3) Improve system reliability: By dynamically adjusting the working state of the chiller, the present invention can better cope with load changes and reduce equipment wear caused by equipment overload or frequent start-stop, thereby improving the reliability and lifespan of the entire system.

[0065] (4) Enhanced system adaptability: Since the present invention can make control decisions based on real-time data, it can better adapt to environmental changes and fluctuations in user demand, ensuring that the chiller unit always operates in the best condition.

[0066] (5) Intelligent control: The control method of the present invention realizes intelligent management of the chiller unit, reduces human intervention, reduces operational complexity, and improves the automation level of the system.

[0067] (6) Reduce operating costs: By optimizing the operation strategy of the chiller, the present invention can not only save energy consumption, but also reduce maintenance costs and downtime, thereby reducing the overall operating costs.

[0068] According to some embodiments of the present invention, the step of controlling and adjusting the operating state of each chiller based on the target total outlet water temperature and the rated cooling parameters of each chiller, so as to match the target total outlet water temperature with all activated chillers, specifically includes:

[0069] Calculate the target total cooling parameters required for the total outlet water temperature;

[0070] Based on the target total cooling parameters and the rated cooling parameters of each chiller, the operating status of each chiller is controlled and adjusted so that all operating chillers match the target total cooling parameters.

[0071] Based on the detailed steps provided in this embodiment, the specific control process of the control method of the present invention is as follows: First, the system needs to calculate the target total cooling parameters required for the total outlet water temperature based on the set target total outlet water temperature. This calculation process is usually based on thermodynamic principles and the heat load characteristics of the chilled water system, taking into account factors such as system heat loss and user demand, to determine the total cooling capacity required to achieve the target temperature.

[0072] Secondly, the system will collect and analyze the rated cooling parameters of each chiller, which typically include the chiller's cooling capacity and efficiency under standard operating conditions. This information is crucial for subsequent load allocation.

[0073] Then, based on the calculated target total cooling parameters and the rated cooling parameters of each chiller, the system will formulate a control strategy. This strategy will determine which chillers need to be turned on, in what state they should operate (e.g., full speed, partial load), and how to distribute the cooling load to ensure that the output of the entire system can meet the target total cooling parameters.

[0074] The system will then send control signals to each chiller, adjusting their operating status according to the established strategy. This may include adjusting the chiller's operating frequency, starting and stopping the chiller, changing the operating mode, and other operations to achieve precise control of the chillers.

[0075] Finally, while performing control and regulation, the system will continuously monitor the chiller's operating status and outlet water temperature to ensure they remain consistent with the target total cooling parameters. If deviations occur, the system will optimize and adjust based on real-time data to ensure the chiller unit always operates efficiently and meets the requirements.

[0076] Through the steps described above, this invention achieves intelligent control of the chiller unit, ensuring high system efficiency and reliability while meeting user temperature requirements, optimizing energy use, and improving overall operating efficiency. This method not only improves the energy efficiency of the chiller system but also reduces energy waste, lowers operating costs, and enhances the user experience.

[0077] The following section will further elaborate on the control method of the chiller, taking the target total cooling parameters, including the target total cooling capacity or the target total cooling power, as examples.

[0078] According to some embodiments of the present invention, the target total cooling parameter includes the target total cooling capacity, and the rated cooling parameter includes the rated cooling capacity.

[0079] Based on the target total cooling parameters and the rated cooling parameters of each chiller, the steps for controlling and adjusting the operating status of each chiller to ensure that all operating chillers match the target total cooling parameters include:

[0080] Based on the target total cooling capacity and the rated cooling capacity of each chiller, determine the chillers that need to be turned on and mark them as chillers to be turned on, and calculate the actual cooling capacity of the chillers to be turned on when they are turned on.

[0081] Control each chiller to be turned on according to its actual cooling capacity, so that the sum of the actual cooling capacities of all chillers to be turned on matches the target total cooling capacity.

[0082] In this embodiment, the system first evaluates and selects the cooling capacity of all available chillers. The system selects several chillers whose combined rated cooling capacity can meet the target total cooling capacity and marks them as chillers to be turned on.

[0083] For each chiller marked as pending activation, the system calculates its cooling capacity at its highest efficiency during actual operation. The system then controls the startup of each chiller based on this calculated actual cooling capacity. This means the system adjusts the operating parameters of each chiller, such as operating frequency, fan speed, and cooling water flow rate, to ensure that each chiller starts up according to its actual cooling capacity.

[0084] Once all the chillers scheduled to start are operational at their actual cooling capacity, the system will monitor their total cooling capacity to ensure it matches the target total cooling capacity. If any deviation occurs, the system will make necessary adjustments, such as increasing or decreasing the operating load of some chillers or adjusting the operating status of others, to ensure the overall system cooling capacity meets the target requirements.

[0085] In this way, the present invention can ensure that the operation of the chiller unit is more efficient and precise, meet the user's cooling needs, and optimize energy use while reducing waste.

[0086] Furthermore, the steps for calculating the actual cooling capacity of the chiller after it is turned on specifically include:

[0087] Based on the target total outlet water temperature, determine the high-efficiency range of the cooling capacity of each chiller to be turned on;

[0088] Based on the rated cooling capacity and the high-efficiency range of each chiller to be turned on, the actual cooling capacity of each chiller when turned on is calculated.

[0089] It is understood that, in the embodiments, the step of calculating the actual cooling capacity of the chiller after it is turned on is further refined as follows:

[0090] First, the system needs to determine the high-efficiency range of cooling capacity for each chiller to be turned on, based on the target total outlet water temperature. The high-efficiency range refers to the range within which the chiller can achieve its optimal energy efficiency ratio when operating within that cooling capacity range. This range is typically derived from the chiller's design characteristics and operating data, and can be obtained through performance curves provided by the manufacturer or through actual testing. The purpose of determining the high-efficiency range is to ensure that the chiller not only meets the cooling requirements but also operates in the most energy-efficient manner.

[0091] Next, the system will calculate the actual cooling capacity based on the rated cooling capacity of each chiller to be turned on and its defined high-efficiency range. This calculation process needs to consider the actual operating conditions of the chillers, such as the current ambient temperature, humidity, and equipment aging level, all of which may affect the actual cooling performance of the chillers. The goal of the calculation is to find the actual cooling capacity that each chiller can provide within its high-efficiency range, so that the sum of the actual cooling capacities of all the chillers turned on matches the target total cooling capacity.

[0092] Based on the calculated actual cooling capacity, the system will further optimize the operation of each chiller. This may include adjusting parameters such as the chiller's operating mode, operating frequency, fan speed, and cooling water flow rate to ensure that each chiller operates within its efficient range and provides the required cooling capacity.

[0093] Thus, this invention ensures that the chiller can operate in the most energy-efficient and effective mode while meeting the target total outlet water temperature. This not only improves the energy efficiency of the chilled water system and reduces energy consumption, but also helps extend the service life of the equipment and reduce maintenance costs.

[0094] Furthermore, after controlling each chiller to start according to its actual cooling capacity, the control method also includes:

[0095] Generate default start logic based on each chiller to be turned on and its corresponding actual cooling capacity;

[0096] The operating status of each chiller will be adjusted according to the default startup logic the next time it is turned on.

[0097] It is understood that, in this embodiment, once the system successfully controls the chillers to be turned on according to their actual cooling capacity and reaches the target total cooling capacity, the system will generate a default start-up logic based on the chillers that were turned on and their actual cooling capacity. This logic is based on the current operating conditions and performance data and is used to guide the chiller start-up and operation strategies in similar situations in the future. The default start-up logic may include which chillers should be turned on first, the operating parameter settings for each chiller, and adjustment strategies under specific load conditions, etc.

[0098] Meanwhile, the generated default startup logic will be stored in the system's control unit for use the next time the chiller needs to be turned on. This storage can be temporary or long-term, depending on the system's control strategy and actual needs.

[0099] When the chillers need to be turned on again, the system will first check the stored default startup logic and adjust the operating status of each chiller accordingly. This means the system will automatically apply previous operating strategies without having to recalculate and adjust each time, thereby improving the system's response speed and operating efficiency.

[0100] It should also be noted that although the system will operate according to the default startup logic, it will still continuously monitor the actual operating status of the chiller and external environmental conditions. If it finds that the actual operating conditions differ significantly from the default logic, or if external conditions change, the system will make necessary dynamic adjustments and optimizations to ensure that the chiller always operates in optimal condition.

[0101] Thus, through the above methods, the control method of the present invention can not only ensure the efficient operation of the chiller under the current operating conditions, but also improve the efficiency and reliability of future operation by generating and applying default start logic.

[0102] According to other embodiments of the present invention, the target total cooling parameter includes the target total cooling power, and the rated cooling parameter includes the rated cooling power.

[0103] Based on the target total cooling parameters and the rated cooling parameters of each chiller, the steps for controlling and adjusting the operating status of each chiller to ensure that all operating chillers match the target total cooling parameters include:

[0104] Based on the target total cooling capacity and the rated cooling capacity of each chiller, determine the chillers that need to be turned on and mark them as chillers to be turned on, and calculate the actual cooling capacity of the chillers to be turned on when they are turned on.

[0105] Control each chiller to be turned on according to its actual cooling capacity, so that the sum of the actual cooling capacity of all chillers to be turned on matches the target total cooling capacity.

[0106] In this embodiment, the system first evaluates the cooling capacity of all available chillers, selects several chillers whose sum of rated cooling power can meet the target total cooling power requirement, and marks them as chillers to be turned on.

[0107] For each chiller marked as to be turned on, the system will calculate its cooling power at its optimal cooling efficiency during actual operation. The system will then control the startup of each chiller based on the calculated actual cooling power. Once all chillers are turned on according to their actual cooling power, the system will monitor the total cooling power of these chillers to ensure that their sum matches the target total cooling power. If any deviation occurs, the system will make necessary adjustments.

[0108] Thus, through the above control methods, the present invention can ensure that the operation of the chiller unit is more efficient and precise, meet the user's cooling power requirements, and optimize energy use while reducing waste.

[0109] Furthermore, the steps for calculating the actual cooling capacity of the chiller after it is turned on specifically include:

[0110] Based on the target total outlet water temperature, determine the high-efficiency range of the cooling capacity of each chiller to be turned on;

[0111] Based on the rated cooling capacity and the high-efficiency range of each chiller to be turned on, the actual cooling capacity of each chiller when turned on is calculated.

[0112] In an embodiment of the present invention, the steps for calculating the actual cooling power of the chiller after it is turned on can be further refined according to the following process:

[0113] The system first determines the high-efficiency range of cooling power for each chiller to be turned on based on the set target total outlet water temperature. The high-efficiency range refers to the range within which the chiller can achieve its optimal energy efficiency ratio when operating within that power range.

[0114] Next, the system will calculate the actual cooling power based on the rated cooling capacity of each chiller to be turned on and its determined high-efficiency range. This calculation process needs to consider the actual operating conditions of the chillers, such as the current ambient temperature, humidity, and equipment aging level, all of which may affect the actual cooling performance of the chillers. The goal of the calculation is to find the actual cooling power that each chiller can provide within its high-efficiency range, so that the sum of the actual cooling power of all the chillers turned on matches the target total cooling power.

[0115] Based on the calculated actual cooling capacity, the system will further optimize the operation of each chiller. This may include adjusting parameters such as the chiller's operating mode, operating frequency, fan speed, and cooling water flow rate to ensure that each chiller operates within its efficient range and provides the required cooling capacity.

[0116] In this way, the present invention ensures that the chiller can operate in the most energy-efficient and effective mode while meeting the target total outlet water temperature. This not only improves the energy efficiency of the chilled water system and reduces energy consumption, but also helps to extend the service life of the equipment and reduce maintenance costs.

[0117] Furthermore, after controlling each chiller to start according to its actual cooling capacity, the process also includes:

[0118] Generate default start logic based on each chiller to be turned on and its corresponding actual cooling capacity;

[0119] The operating status of each chiller will be adjusted according to the default startup logic the next time it is turned on.

[0120] Thus, through the above methods, the control method of the present invention can not only ensure the efficient operation of the chiller under the current operating conditions, but also improve the efficiency and reliability of future operation by generating and applying default start logic.

[0121] According to some embodiments of the present invention, after the step of controlling and adjusting the operating state of each chiller based on the target total outlet water temperature and the rated refrigeration parameters of each chiller, the method further includes:

[0122] When the target total outlet water temperature changes, the actual cooling parameters of the chiller to be started are adjusted in real time according to the changed target total outlet water temperature.

[0123] Specifically, the system will continuously monitor the target total outlet water temperature so that it can react promptly to changes in temperature. Temperature monitoring can be achieved through sensors installed in the system, which can provide accurate data on the outlet water temperature in real time.

[0124] When the system detects a change in the target total outlet water temperature, it analyzes whether this change is a continuous trend or a temporary fluctuation. This analysis is crucial for determining subsequent adjustment strategies.

[0125] Based on the revised target total outlet water temperature, the system will recalculate the actual cooling parameters for the chillers to be started. This includes reassessing the cooling requirements of each chiller and their efficient operating range under the new conditions.

[0126] Based on the recalculated actual cooling parameters, the system will adjust the operating status of the chiller to be started. This may include changing the chiller's operating frequency, adjusting the cooling water flow rate, changing the operating mode, etc., to ensure that the actual cooling output matches the new target total outlet water temperature.

[0127] The system will perform the above adjustments in real time to ensure that the chiller can respond quickly to temperature changes and maintain the outlet water temperature within the new target range. This adjustment may be continuous or periodic, depending on the system design and control strategy.

[0128] It should be noted that even after adjustments, the system will continuously monitor the chiller's operating status and outlet water temperature to ensure that the system always maintains optimal operating efficiency. If the system detects new deviations or signs of reduced efficiency, necessary optimizations and adjustments will be made again.

[0129] Thus, through the aforementioned real-time adjustment mechanism, the control method of this invention can ensure that the chilled water system has greater adaptability and flexibility in the face of temperature changes, thereby providing users with a more stable and comfortable environment. At the same time, this dynamic adjustment also helps to improve energy efficiency, reduce energy waste, lower operating costs, and enhance the long-term reliability of the system.

[0130] The control device for the chiller unit provided by the present invention is described below. The control device for the chiller unit described below can be referred to in correspondence with the control method for the chiller unit described above.

[0131] like Figure 2 As shown, according to a second aspect embodiment of the present invention, the control device for a chiller unit includes a plurality of chillers connected in parallel and a main water outlet terminal connected thereto. The control device includes:

[0132] The acquisition module 110 is used to acquire the rated cooling parameters of each chiller and the target total outlet water temperature at the total outlet water terminal.

[0133] The control module 120 is used to control and adjust the working status of each chiller according to the target total outlet water temperature and the rated cooling parameters of each chiller, so that all the chillers that are turned on match the target total outlet water temperature.

[0134] According to a third aspect of the present invention, a chiller unit includes a plurality of chillers connected in parallel and a main water outlet terminal connected thereto, and also includes a memory, a processor and a computer program stored in the memory and executable on the processor. When the processor executes the program, it implements the control method of the chiller unit as described in the first aspect of the present invention.

[0135] Figure 3 An example is a schematic diagram of the physical structure of an electronic device, such as... Figure 3As shown, the electronic device may include a processor 810, a communication interface 820, a memory 830, and a communication bus 840. The processor 810, communication interface 820, and memory 830 communicate with each other via the communication bus 840. The processor 810 can call logic instructions in the memory 830 to execute a control method for the chiller unit. This method includes: acquiring the rated cooling parameters of each chiller and the target total outlet water temperature at the main outlet; and controlling and adjusting the operating state of each chiller according to the target total outlet water temperature and the rated cooling parameters of each chiller, so that all activated chillers match the target total outlet water temperature.

[0136] Furthermore, the logical instructions in the aforementioned memory 830 can be implemented as software functional units and, when sold or used as independent products, can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present invention, essentially, or the part that contributes to the prior art, or a 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.

[0137] On the other hand, the present invention also provides a computer program product, which includes a computer program that can be stored on a non-transitory computer-readable storage medium. When the computer program is executed by a processor, the computer can execute the control method for the chiller unit provided by the above methods. The method includes: acquiring the rated cooling parameters of each chiller and the target total outlet water temperature at the total outlet water terminal; and controlling and adjusting the operating state of each chiller according to the target total outlet water temperature and the rated cooling parameters of each chiller so that all the chillers that are turned on match the target total outlet water temperature.

[0138] In another aspect, the present invention also provides a non-transitory computer-readable storage medium having a computer program stored thereon. When executed by a processor, the computer program implements a control method for a chiller unit provided by the above methods. The method includes: acquiring the rated cooling parameters of each chiller and the target total outlet water temperature at the main outlet; and controlling and adjusting the operating state of each chiller according to the target total outlet water temperature and the rated cooling parameters of each chiller, so that all the chillers in operation match the target total outlet water temperature.

[0139] The device embodiments described above are merely illustrative. The units described as separate components may or may not be physically separate, and 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 modules can be selected to achieve the purpose of this embodiment according to actual needs. Those skilled in the art can understand and implement this without any creative effort.

[0140] Through the above description of the embodiments, those skilled in the art can clearly understand that each embodiment can be implemented by means of software plus necessary general-purpose hardware platforms, and of course, it can also be implemented by hardware. Based on this understanding, the above technical solutions, in essence or the part that contributes to the prior art, can be embodied in the form of a software product. This computer software product can be stored in a computer-readable storage medium, such as ROM / RAM, magnetic disk, optical disk, etc., including several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute the methods of various embodiments or some parts of embodiments.

[0141] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A control method for a chiller unit, characterized in that, The chiller unit includes multiple chillers connected in parallel and a main water outlet connected thereto. The control method includes: Obtain the rated cooling parameters of each of the chillers, and the target total outlet water temperature of the total outlet water terminal; Based on the target total outlet water temperature and the rated cooling parameters of each chiller, the operating status of each chiller is controlled and adjusted so that all the chillers that are turned on match the target total outlet water temperature.

2. The control method for a chiller unit according to claim 1, characterized in that, The step of controlling and adjusting the operating status of each chiller according to the target total outlet water temperature and the rated refrigeration parameters of each chiller, so that all the chillers in operation match the target total outlet water temperature, specifically includes: Calculate the target total cooling parameters required for the total outlet water temperature; Based on the target total cooling parameters and the rated cooling parameters of each chiller, the operating status of each chiller is controlled and adjusted so that all the chillers that are turned on match the target total cooling parameters.

3. The control method for a chiller unit according to claim 2, characterized in that, The target total cooling parameter includes the target total cooling capacity, and the rated cooling parameter includes the rated cooling capacity. The step of controlling and adjusting the operating state of each chiller based on the target total cooling parameter and the rated cooling parameters of each chiller, so that all the activated chillers match the target total cooling parameter, specifically includes: Based on the target total cooling capacity and the rated cooling capacity of each chiller, determine the chillers that need to be turned on and mark them as chillers to be turned on, and calculate the actual cooling capacity of the chillers to be turned on when they are turned on. Each of the chillers to be turned on is controlled to start according to its actual cooling capacity, so that the sum of the actual cooling capacities of all the chillers to be turned on matches the target total cooling capacity.

4. The control method for a chiller unit according to claim 3, characterized in that, The step of calculating the actual cooling capacity of the chiller after it is turned on specifically includes: Based on the target total outlet water temperature, determine the high-efficiency range of the cooling capacity of each of the chillers to be turned on; Based on the rated cooling capacity and the high-efficiency range of each chiller to be turned on, the actual cooling capacity of each chiller to be turned on when it is turned on is calculated.

5. The control method for a chiller unit according to claim 3, characterized in that, After the step of controlling each of the chillers to be turned on to start according to its actual cooling capacity, the method further includes: A default start logic is generated based on each chiller to be turned on and its corresponding actual cooling capacity. The operating status of each chiller will be adjusted according to the default startup logic upon the next startup.

6. The control method for a chiller unit according to claim 2, characterized in that, The target total cooling parameter includes the target total cooling power, and the rated cooling parameter includes the rated cooling power. The step of controlling and adjusting the operating state of each chiller based on the target total cooling parameter and the rated cooling parameter of each chiller, so that all the activated chillers match the target total cooling parameter, specifically includes: Based on the target total cooling power and the rated cooling power of each chiller, determine the chillers that need to be turned on and mark them as chillers to be turned on, and calculate the actual cooling power of the chillers to be turned on when they are turned on. Each of the chillers to be turned on is controlled to start according to its actual cooling power, so that the sum of the actual cooling power of all the chillers to be turned on matches the target total cooling power.

7. The control method for a chiller unit according to claim 6, characterized in that, The step of calculating the actual cooling power of the chiller to be turned on after it is turned on specifically includes: Based on the target total outlet water temperature, determine the high-efficiency range of the cooling power of each of the chillers to be turned on; Based on the rated cooling power and the high-efficiency range of each chiller to be turned on, the actual cooling power of each chiller to be turned on when it is turned on is calculated.

8. The control method for a chiller unit according to claim 6, characterized in that, After the step of controlling each of the chillers to be turned on to start according to their respective actual cooling capacity, the method further includes: A default start logic is generated based on each chiller to be turned on and its corresponding actual cooling power. The operating status of each chiller will be adjusted according to the default startup logic upon the next startup.

9. The control method for a chiller unit according to any one of claims 3 to 8, characterized in that, After the step of controlling and adjusting the operating state of each chiller based on the target total outlet water temperature and the rated refrigeration parameters of each chiller, the method further includes: If the target total outlet water temperature changes, the actual cooling parameters of the chiller to be turned on are adjusted in real time according to the changed target total outlet water temperature.

10. A control device for a chiller unit, characterized in that, The chiller unit includes multiple chillers connected in parallel and a main water outlet connected thereto; the control device includes: The acquisition module is used to acquire the rated refrigeration parameters of each of the chillers and the target total outlet water temperature of the total outlet water terminal; The control module is used to control and adjust the working state of each chiller according to the target total outlet water temperature and the rated cooling parameters of each chiller, so that all the chillers that are turned on match the target total outlet water temperature.

11. A water chiller unit, characterized in that, It includes multiple chillers connected in parallel and a main water outlet connected thereto, and also includes a memory, a processor and a computer program stored in the memory and executable on the processor, wherein the processor executes the program to implement the control method of the chiller unit as described in any one of claims 1 to 9.

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