Flow control method, device and equipment of cold water or heat pump unit and storage medium

Abstract

This invention provides a flow control method, apparatus, device, and storage medium for chilled water or heat pump units. The method includes: acquiring real-time pressure information of the chilled water or heat pump unit, as well as the initial pressure difference and resistance characteristic coefficient of the pipe network characteristic curve function, wherein the real-time pressure information includes the real-time pressure of the supply pipe and the real-time pressure of the outlet pipe; calculating the real-time pressure difference between the supply pipe pressure and the outlet pipe pressure; calculating the real-time flow rate of the pipe network characteristic curve function based on the real-time pressure difference, the initial pressure difference of the pipe network, and the resistance characteristic coefficient; and controlling the flow rate of the chilled water or heat pump unit based on the real-time flow rate. This invention not only allows for real-time monitoring of the flow rate of each chilled water or heat pump unit and real-time adjustment of its operation, improving the energy efficiency of the air conditioning system, ensuring stable operation and optimized working state of the chilled water or heat pump unit, but also reduces the cost of the air conditioning system.

Description

Technical Field

[0001] This invention relates to the field of air conditioning room technology, and in particular to a flow control method, device, equipment and storage medium for chilled water or heat pump units. Background Technology

[0002] Chilled water or heat pump units are key to improving the energy efficiency of air conditioning systems. The flow rate of these units is a crucial parameter during operation. In existing projects, flow meters are typically installed on the main water pipe of the air conditioning system to monitor the flow rate and check for deviations between the total flow rate and the design flow rate. However, installing a flow meter on every chilled water or heat pump unit not only increases the cost of the air conditioning system but also increases the operating resistance of the system due to the generally contact installation between the flow meter and the pipe, thus increasing pump energy consumption. Furthermore, in actual construction, installation conditions are often lacking, and the straight pipe length does not meet standard requirements, resulting in poor measurement accuracy. This affects the adjustment of system operation strategies and ultimately impacts the energy efficiency of the air conditioning system. Summary of the Invention

[0003] The purpose of this invention is to provide a flow control method, device, equipment, and storage medium for chilled water or heat pump units. This not only allows for real-time monitoring of the flow rate of each chilled water or heat pump unit and real-time adjustment of its operation, thereby reducing energy consumption and improving energy efficiency of the air conditioning system, ensuring stable operation and optimized working status of the chilled water or heat pump units, but also reduces the cost of the air conditioning system.

[0004] The objective of this invention can be achieved through the following technical solution: a flow control method for a chilled water or heat pump unit, comprising: acquiring real-time pressure information of the chilled water or heat pump unit, and the initial pressure difference and resistance characteristic coefficient of the pipeline network characteristic curve function, wherein the real-time pressure information includes the real-time pressure of the water supply pipeline and the real-time pressure of the water outlet pipeline.

[0005] Calculate the real-time pressure difference between the real-time pressure of the water supply pipeline and the real-time pressure of the water outlet pipeline;

[0006] The real-time flow rate of the pipeline characteristic curve function is calculated based on the real-time pressure difference, the initial pressure difference of the pipeline network, and the resistance characteristic coefficient.

[0007] The flow rate of the chilled water or heat pump unit is controlled based on the real-time flow rate.

[0008] Furthermore, the initial pressure difference of the pipeline network and the resistance characteristic coefficient are obtained using the following method:

[0009] Obtain the historical pressure drop and historical flow rate on the evaporator side of the chilled water or heat pump unit;

[0010] The historical pressure drop and historical flow rate are processed using a linear regression method to obtain the initial pressure difference of the pipeline network and the resistance characteristic coefficient.

[0011] Furthermore, the step of calculating the real-time flow rate of the pipeline characteristic curve function based on the real-time pressure difference, the initial pressure difference of the pipeline network, and the resistance characteristic coefficient includes:

[0012] The real-time flow rate is obtained by dividing the difference between the real-time pressure difference and the initial pressure difference of the pipeline by the square root of the quotient of the resistance characteristic coefficient.

[0013] Furthermore, the step of controlling the flow rate of the chilled water or heat pump unit based on the real-time flow rate also includes:

[0014] If the real-time flow rate is less than the preset flow rate threshold, reduce the number of chilled water or heat pump units that are turned on.

[0015] If the real-time flow rate is greater than the flow rate threshold, increase the number of chilled water or heat pump units that are turned on.

[0016] Furthermore, to achieve the above objectives, the present invention also provides a flow control device for a chiller unit, comprising:

[0017] The acquisition module is used to acquire real-time pressure information of chilled water or heat pump units, as well as the initial pressure difference and resistance characteristic coefficient of the pipeline characteristic curve function. The real-time pressure information includes the real-time pressure of the water supply pipeline and the real-time pressure of the water outlet pipeline.

[0018] The first calculation module is used to calculate the real-time pressure difference between the real-time pressure of the water supply pipeline and the real-time pressure of the water outlet pipeline.

[0019] The second calculation module is used to calculate the real-time flow rate of the pipeline characteristic curve function based on the real-time pressure difference, the initial pressure difference of the pipeline network, and the resistance characteristic coefficient.

[0020] A control module is used to control the flow rate of the chilled water or heat pump unit based on the real-time flow rate.

[0021] Furthermore, the acquisition module is also used for:

[0022] Obtain the historical pressure drop and historical flow rate on the evaporator side of the chilled water or heat pump unit;

[0023] The historical pressure drop and historical flow rate are processed using a linear regression method to obtain the initial pressure difference of the pipeline network and the resistance characteristic coefficient.

[0024] Furthermore, the second computing module is also used for:

[0025] The real-time flow rate is obtained by dividing the difference between the real-time pressure difference and the initial pressure difference of the pipeline by the square root of the quotient of the resistance characteristic coefficient.

[0026] Furthermore, the control module is also used for:

[0027] If the real-time flow rate is less than the preset flow rate threshold, reduce the number of chilled water or heat pump units that are turned on.

[0028] If the real-time flow rate is greater than the flow rate threshold, increase the number of chilled water or heat pump units that are turned on.

[0029] Furthermore, to achieve the above objectives, the present invention also provides an electronic device for flow control of a chilled water or heat pump unit, comprising:

[0030] At least one processor; and,

[0031] A memory communicatively connected to the at least one processor; wherein,

[0032] The memory stores instructions that can be executed by the at least one processor to enable the at least one processor to perform the flow control method for the chilled water or heat pump unit as described above.

[0033] In addition, to achieve the above objectives, the present invention also provides a storage medium storing computer instructions, which, when executed by a computer, are used to perform all steps of the flow control method for a chilled water or heat pump unit as described above.

[0034] Compared with the prior art, the technical solution of the present invention has the following advantages:

[0035] This invention obtains real-time pressure information of chiller or heat pump units, as well as the initial pressure difference and resistance characteristic coefficient of the pipeline characteristic curve function, to calculate the real-time pressure difference between the supply and outlet water pipelines. Based on the real-time pressure difference, the initial pressure difference, and the resistance characteristic coefficient, the real-time flow rate of the pipeline characteristic curve function is calculated. The flow rate of the chiller or heat pump units is controlled according to the real-time flow rate. This not only allows for real-time monitoring of the flow rate of each chiller or heat pump unit and real-time adjustment of its operation, reducing air conditioning system energy consumption, improving air conditioning system energy efficiency, ensuring stable operation and optimized working state of the chiller units, but also reduces the cost of the air conditioning system. Attached Figure Description

[0036] The disclosure of this invention will become more readily understood by referring to the accompanying drawings. It should be understood that these drawings are for illustrative purposes only and are not intended to limit the scope of protection of this invention. In the drawings:

[0037] Figure 1 This is a schematic diagram of the workflow of a flow control method for a chilled water or heat pump unit provided in an embodiment of the present invention;

[0038] Figure 2 This is a schematic diagram of the structure of a flow control device for a chilled water or heat pump unit according to an embodiment of the present invention;

[0039] Figure 3 This is a schematic diagram of the structure of a flow control device for a chilled water or heat pump unit provided in another embodiment of the present invention;

[0040] Figure 4 This is a schematic diagram of the hardware structure of an electronic device for flow control of a chilled water or heat pump unit according to an embodiment of the present invention. Attached image description:

[0042] 1-Heat exchanger for chilled water or heat pump unit; 2-Pressure sensor for water supply pipeline; 3-Pressure sensor for water outlet pipeline; 41-Control cabinet; 42-Controller; 43-Data acquisition module; 5-Sensing circuit. Detailed Implementation

[0043] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments.

[0044] like Figure 1 As shown, Figure 1 A schematic diagram of the workflow of a flow control method for a chiller or heat pump unit according to an embodiment of the present invention includes:

[0045] Step S101: Obtain the real-time pressure information of the chilled water or heat pump unit, as well as the initial pressure difference and resistance characteristic coefficient of the pipeline characteristic curve function. The real-time pressure information includes the real-time pressure of the water supply pipeline and the real-time pressure of the water outlet pipeline.

[0046] Step S102: Calculate the real-time pressure difference between the real-time pressure of the water supply pipeline and the real-time pressure of the water outlet pipeline;

[0047] Step S103: Calculate the real-time flow rate of the pipeline characteristic curve function based on the real-time pressure difference, the initial pressure difference of the pipeline network, and the resistance characteristic coefficient;

[0048] Step S104: Control the flow rate of the chilled water or heat pump unit according to the real-time flow rate.

[0049] In specific implementations, such as Figure 2As shown, the flow control device for the chilled water or heat pump unit in this embodiment includes a chilled water or heat pump unit heat exchanger 1, a water supply pipeline pressure sensor 2, an outlet water supply pipeline pressure sensor 3, a control module, a control cabinet 41, a controller 42, a data acquisition module 43, and sensor lines 5. The controller 42 and the data acquisition module 43 are installed in the control cabinet 41. The water supply pipeline pressure sensor 2 is installed on the water supply pipeline, and the outlet water supply pipeline pressure sensor 3 is installed on the outlet water supply pipeline. The water supply pipeline pressure sensor 2 and the outlet water supply pipeline pressure sensor 3 are respectively connected to the data acquisition module 43. The controller 42 first executes step S101 to obtain the real-time pressure information of the chilled water or heat pump unit, as well as the initial pressure difference and resistance characteristic coefficient of the pipeline network characteristic curve function. The real-time pressure information includes the real-time pressure of the water supply pipeline and the pressure of the outlet water supply pipeline. The real-time pressure of the water supply pipeline is obtained by the water supply pipeline pressure sensor 2 installed on the water supply pipeline and the real-time pressure of the water outlet pipeline installed by the water outlet pipeline pressure sensor 3 installed on the water outlet pipeline. The data acquisition module 43 obtains the real-time pressure of the water supply pipeline and the real-time pressure of the water outlet pipeline through the sensor line 5. Then, step S102 is executed to calculate the real-time pressure difference between the real-time pressure of the water supply pipeline and the real-time pressure of the water outlet pipeline. Then, step S103 is executed to calculate the real-time flow rate of the pipeline characteristic curve function based on the real-time pressure difference, the initial pressure difference of the pipeline network, and the resistance characteristic coefficient. Finally, step S104 is executed to control the flow rate of the chiller or heat pump unit based on the real-time flow rate. The flow rate of a single chiller or heat pump unit can be controlled based on the real-time flow rate, or the number of chiller or heat pump units that are turned on can be controlled to adjust the flow rate of the system.

[0050] This embodiment calculates the real-time pressure difference between the supply and outlet water pipes by acquiring real-time pressure information of the chiller or heat pump unit, as well as the initial pressure difference and resistance characteristic coefficient of the pipe network characteristic curve function. Based on the real-time pressure difference, the initial pressure difference, and the resistance characteristic coefficient, the real-time flow rate of the pipe network characteristic curve function is calculated. The flow rate of the chiller or heat pump unit is controlled according to the real-time flow rate. This not only allows for real-time monitoring of the flow rate of each chiller or heat pump unit and real-time adjustment of its operation, reducing air conditioning system energy consumption, improving air conditioning system energy efficiency, and ensuring stable operation and optimized working state of the chiller unit, but also reduces the cost of the air conditioning system.

[0051] In one embodiment, the initial pressure differential and resistance characteristic coefficient of the pipeline network are obtained using the following method:

[0052] Obtain the historical pressure drop and historical flow rate on the evaporator side of the chilled water or heat pump unit;

[0053] The historical pressure drop and historical flow rate are processed using a linear regression method to obtain the initial pressure difference of the pipeline network and the resistance characteristic coefficient.

[0054] In practice, the historical flow rate of the chilled water or heat pump unit and the historical pressure drop on the evaporator side are obtained. The least squares method is used to perform linear regression on the historical flow rate and historical pressure drop. The regression effect is judged by relevant indices, and the initial pressure difference and resistance characteristic coefficient of the pipeline network are obtained.

[0055] In one embodiment, the real-time flow rate of the pipeline characteristic curve function is calculated based on the real-time pressure difference, the initial pressure difference of the pipeline network, and the resistance characteristic coefficient, including:

[0056] The real-time flow rate is obtained by dividing the difference between the real-time pressure difference and the initial pressure difference of the pipeline by the square root of the quotient of the resistance characteristic coefficient.

[0057] Preferably, the real-time traffic is calculated using the following formula:

[0058]

[0059] Wherein, G is the real-time flow rate; P1 is the real-time pressure of the water supply pipeline; P2 is the real-time pressure of the water outlet pipeline; P0 is the initial pressure difference of the pipeline network; and S is the resistance characteristic coefficient.

[0060] In practice, the difference between the real-time pressure of the water supply pipeline and the real-time pressure of the water outlet pipeline is called the real-time pressure difference. The real-time flow rate of the pipeline characteristic curve function is calculated based on the real-time pressure difference, the initial pressure difference of the pipeline network, and the resistance characteristic coefficient. The flow rate of the chilled water or heat pump unit is controlled based on the calculated real-time flow rate.

[0061] In one embodiment, controlling the flow rate of the chilled water or heat pump unit based on the real-time flow rate further includes:

[0062] If the real-time flow rate is less than the preset flow rate threshold, reduce the number of chilled water or heat pump units that are turned on.

[0063] If the real-time flow rate is greater than the flow rate threshold, increase the number of chilled water or heat pump units that are turned on.

[0064] In practice, for some fixed-frequency units, the flow rate can only be adjusted by controlling the number of chilled water or heat pump units in operation. A flow rate threshold is set according to the process requirements. If the real-time flow rate is less than the flow rate threshold, the number of chilled water or heat pump units in operation is reduced to bring the real-time flow rate down to the range required by the process. If the real-time flow rate is greater than the flow rate threshold, the number of chilled water or heat pump units in operation is increased to bring the real-time flow rate up to the range required by the process.

[0065] like Figure 3 As shown, Figure 3 A schematic diagram of a flow control device for a chiller or heat pump unit provided by the present invention includes:

[0066] The acquisition module 301 is used to acquire real-time pressure information of chilled water or heat pump units, as well as the initial pressure difference and resistance characteristic coefficient of the pipeline characteristic curve function. The real-time pressure information includes the real-time pressure of the water supply pipeline and the real-time pressure of the water outlet pipeline.

[0067] The first calculation module 302 is used to calculate the real-time pressure difference between the real-time pressure of the water supply pipeline and the real-time pressure of the water outlet pipeline.

[0068] The second calculation module 303 is used to calculate the real-time flow rate of the pipeline characteristic curve function based on the real-time pressure difference, the initial pressure difference of the pipeline network, and the resistance characteristic coefficient.

[0069] The control module 304 is used to control the flow rate of the chilled water or heat pump unit based on the real-time flow rate.

[0070] This embodiment acquires the real-time pressure of the water supply pipeline and the water outlet pipeline, as well as the initial pressure difference and resistance characteristic coefficient of the pipeline characteristic curve function through an acquisition module. The first calculation module calculates the real-time pressure difference between the real-time pressure of the water supply pipeline and the water outlet pipeline. The second calculation module calculates the real-time flow rate of the pipeline characteristic curve function based on the real-time pressure difference, the initial pressure difference of the pipeline, and the resistance characteristic coefficient. The control module controls the flow rate of the chiller or heat pump unit based on the real-time flow rate. This not only allows for real-time monitoring of the flow rate of each chiller or heat pump unit and real-time adjustment of its operation, reducing the energy consumption of the air conditioning system, improving the energy efficiency of the air conditioning system, and ensuring the stable operation and optimized working state of the chiller unit, but also reduces the cost of the air conditioning system.

[0071] In one embodiment, to better obtain the pipeline characteristic curve function, the acquisition module 301 is further configured to:

[0072] Obtain the historical pressure drop and historical flow rate on the evaporator side of the chilled water or heat pump unit;

[0073] The historical pressure drop and historical flow rate are processed using a linear regression method to obtain the initial pressure difference of the pipeline network and the resistance characteristic coefficient.

[0074] In one embodiment, to better obtain the real-time flow rate of the chilled water or heat pump unit, the second calculation module 303 is further configured to:

[0075] The real-time flow rate is obtained by dividing the difference between the real-time pressure difference and the initial pressure difference of the pipeline by the square root of the quotient of the resistance characteristic coefficient.

[0076] In one embodiment, to better control the flow rate of the chilled water or heat pump unit, the control module 304 is further configured to:

[0077] If the real-time flow rate is less than the preset flow rate threshold, reduce the number of chilled water or heat pump units that are turned on.

[0078] If the real-time flow rate is greater than the flow rate threshold, increase the number of chilled water or heat pump units that are turned on.

[0079] like Figure 4 As shown, a hardware structure diagram of an electronic device for flow control of a chiller or heat pump unit according to an embodiment of the present invention includes:

[0080] At least one processor;

[0081] And a memory communicatively connected to at least one processor; wherein the memory stores instructions executable by at least one processor, the instructions being executed by at least one processor to enable at least one processor to perform the flow control method for the chilled water or heat pump unit as described above.

[0082] Figure 4 Take a processor 401 as an example.

[0083] The electronic device is preferably an electronic control unit (ECU).

[0084] The electronic device may also include an input device 403 and an output device 404.

[0085] The processor 401, memory 402, input device 403 and output device 404 can be connected by a bus or other means. The figure shows an example of connection by bus.

[0086] Memory 402, as a non-volatile computer-readable storage medium, can be used to obtain non-volatile software programs, non-volatile computer-executable programs, and modules, such as the program instructions / modules corresponding to the flow control method of the chiller or heat pump unit in the embodiments of this application, for example, Figure 1 The diagram illustrates the workflow of the flow control method for a chiller or heat pump unit. The processor 401 executes various functional applications and data processing by running non-volatile software programs, instructions, and modules retrieved from the memory 402, thereby implementing the flow control method for the chiller or heat pump unit described in the above embodiments.

[0087] Memory 402 may include a program acquisition area and a data acquisition area, wherein the program acquisition area may acquire an operating system and an application program required for at least one function; the data acquisition area may acquire data created based on the use of the flow control method of the chiller or heat pump unit, etc. Furthermore, memory 402 may include high-speed random access memory and may also include non-volatile memory, such as at least one disk storage device, flash memory device, or other non-volatile solid-state storage device. In some embodiments, memory 402 may optionally include memory remotely located relative to processor 401, which can be connected via a network to means of performing the flow control method of the chiller or heat pump unit. Examples of such networks include, but are not limited to, the Internet, intranets, local area networks, mobile communication networks, and combinations thereof.

[0088] Input device 403 can receive user clicks and generate signal inputs related to user settings and function control of the flow control method for the chiller or heat pump unit. Output device 404 may include display devices such as a display screen.

[0089] When the one or more modules are accessed in the memory 402 and are run by the one or more processors 401, the flow control method of the chilled water or heat pump unit in any of the above method embodiments is executed.

[0090] The above-described product can perform the methods provided in the embodiments of this application, and has the corresponding functional modules and beneficial effects for performing the methods. Technical details not described in detail in this embodiment can be found in the methods provided in the embodiments of this application.

[0091] The electronic devices of this invention exist in various forms, including but not limited to:

[0092] (1) Electronic Control Unit (ECU), also known as "vehicle computer" or "on-board computer", is mainly composed of a microprocessor (CPU), memory (ROM, RAM), input / output interface (I / O), analog-to-digital converter (A / D), and large-scale integrated circuits for shaping and driving.

[0093] (2) Mobile communication devices: These devices are characterized by their mobile communication capabilities and primarily aim to provide voice and data communication. These terminals include: smartphones (e.g., iPhones), multimedia phones, feature phones, and low-end phones, etc.

[0094] (3) Ultra-mobile personal computer devices: These devices fall under the category of personal computers, possessing computing and processing capabilities, and generally also have mobile internet access features. These terminals include: PDAs, MIDs, and UMPCs, etc.

[0095] (4) Portable entertainment devices: These devices can display and play multimedia content. This category includes: audio and video players (such as iPods), handheld game consoles, e-books, as well as smart toys and portable car navigation devices.

[0096] (5) Server: A device that provides computing services. The components of a server include a processor, hard disk, memory, system bus, etc. Servers are similar to general computer architectures, but because they need to provide highly reliable services, they have higher requirements in terms of processing power, stability, reliability, security, scalability, and manageability.

[0097] (6) Other electronic devices with data interaction functions.

[0098] Furthermore, the logical instructions in the aforementioned memory 402 can be implemented as software functional units and sold or used as independent products, and can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present invention, 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 mobile terminal (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods described in 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.

[0099] 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 the embodiments of the present invention according to actual needs. Those skilled in the art can understand and implement this without any creative effort.

[0100] 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., and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute the methods described in the various embodiments or some parts of the embodiments.

[0101] An embodiment of the present invention also provides a storage medium, wherein the storage medium stores computer instructions, which, when executed by a computer, are used to perform all steps of the flow control method for a chilled water or heat pump unit as described in any of the method embodiments above.

[0102] It should be noted that, in this document, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or system that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or system. Unless otherwise specified, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or system that includes that element.

[0103] The above are merely preferred embodiments of the present invention and do not limit the scope of the patent. Any equivalent structural or procedural transformations made based on the description and drawings of the present invention, or direct or indirect applications in other related technical fields, are similarly included within the scope of patent protection of the present invention.

Claims

1. A flow control method for a chiller or heat pump unit, characterized in that, include: The real-time pressure information of the chilled water or heat pump unit, as well as the initial pressure difference and resistance characteristic coefficient of the pipeline network characteristic curve function, are obtained. The real-time pressure information includes the real-time pressure of the supply pipeline and the real-time pressure of the outlet pipeline. The initial pressure difference and the resistance characteristic coefficient are obtained using the following methods: Obtain the historical pressure drop and historical flow rate on the evaporator side of the chilled water or heat pump unit; The historical pressure drop and historical flow rate are processed using a linear regression method to obtain the initial pressure difference of the pipeline network and the resistance characteristic coefficient; Calculate the real-time pressure difference between the real-time pressure of the water supply pipeline and the real-time pressure of the water outlet pipeline; The real-time flow rate of the pipeline characteristic curve function is calculated based on the real-time pressure difference, the initial pressure difference of the pipeline network, and the resistance characteristic coefficient. The flow rate of the chilled water or heat pump unit is controlled based on the real-time flow rate.

2. The flow control method for a chilled water or heat pump unit according to claim 1, characterized in that, The step of calculating the real-time flow rate of the pipeline characteristic curve function based on the real-time pressure difference, the initial pressure difference of the pipeline network, and the resistance characteristic coefficient includes: The real-time flow rate is obtained by dividing the difference between the real-time pressure difference and the initial pressure difference of the pipeline by the square root of the quotient of the resistance characteristic coefficient.

3. The flow control method for a chilled water or heat pump unit according to claim 1, characterized in that, The method of controlling the flow rate of the chilled water or heat pump unit based on the real-time flow rate further includes: If the real-time flow rate is less than the preset flow rate threshold, reduce the number of chilled water or heat pump units that are turned on. If the real-time flow rate is greater than the flow rate threshold, increase the number of chilled water or heat pump units that are turned on.

4. A flow control device for a chilled water or heat pump unit, characterized in that, include: The acquisition module is used to acquire real-time pressure information of chilled water or heat pump units, as well as the initial pressure difference and resistance characteristic coefficient of the pipe network characteristic curve function. The real-time pressure information includes the real-time pressure of the supply pipe and the real-time pressure of the outlet pipe. The acquisition module is also used for: Obtain the historical pressure drop and historical flow rate on the evaporator side of the chilled water or heat pump unit; The historical pressure drop and historical flow rate are processed using a linear regression method to obtain the initial pressure difference of the pipeline network and the resistance characteristic coefficient; The first calculation module is used to calculate the real-time pressure difference between the real-time pressure of the water supply pipeline and the real-time pressure of the water outlet pipeline. The second calculation module is used to calculate the real-time flow rate of the pipeline characteristic curve function based on the real-time pressure difference, the initial pressure difference of the pipeline network, and the resistance characteristic coefficient. A control module is used to control the flow rate of the chilled water or heat pump unit based on the real-time flow rate.

5. The flow control device for a chilled water or heat pump unit according to claim 4, characterized in that, The second calculation module is also used for: The real-time flow rate is obtained by dividing the difference between the real-time pressure difference and the initial pressure difference of the pipeline by the square root of the quotient of the resistance characteristic coefficient.

6. The flow control device for a chilled water or heat pump unit according to claim 4, characterized in that, The control module is also used for: If the real-time flow rate is less than the preset flow rate threshold, reduce the number of chilled water or heat pump units that are turned on. If the real-time flow rate is greater than the flow rate threshold, increase the number of chilled water or heat pump units that are turned on.

7. A flow control electronic device for a chiller or heat pump unit, characterized in that, include: At least one processor; as well as, A memory communicatively connected to the at least one processor; wherein, The memory stores instructions that can be executed by the at least one processor to enable the at least one processor to perform the flow control method for a chiller or heat pump unit as described in any one of claims 1 to 3.

8. A storage medium, characterized in that, The storage medium stores computer instructions that, when executed by a computer, perform all steps of the flow control method for a chiller or heat pump unit as described in any one of claims 1 to 3.

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