Intelligent control system of refrigeration station

Abstract

The utility model discloses an intelligent control system of a refrigeration station, which belongs to the technical field of refrigeration stations and comprises a field sensor, an actuating mechanism, a programmable logic controller (PLC) general control unit and a server. The field sensor is arranged in a pipe network and is used for collecting feedback data of the pipe network; the PLC general control unit is used for acquiring feedback data of the field sensor and storing the feedback data in the server; the server sends a control instruction to an execution mechanism of a tail end unit in a pipe network for execution through the PLC general control unit; the field sensor comprises a control instrument and a detection instrument; the control instrument and the detection instrument are both connected with the input end of the PLC general control unit, and the execution mechanism is connected with the output end of the PLC general control unit. And the control instrument and the detection instrument are arranged on the tail end unit in the pipe network. According to the intelligent control system for the refrigeration station, various devices are integrated, so that comprehensive monitoring and control on a refrigeration station pipe network and a tail end unit are realized.

Description

Technical Field

[0001] The utility model belongs to the technical field of refrigeration stations, and in particular relates to an intelligent control system for a refrigeration station. Background Art

[0002] Refrigeration stations are a common infrastructure in many buildings, including residences and factories. However, these stations involve a large number of different types of equipment, facing varying weather conditions and usage conditions daily. On-site systems lack basic decision-making information, so operators are often forced to rely on past experience to commission power equipment and adjust their operating parameters. However, it is difficult for operators to manually adjust system operations 24 / 7 with high frequency and precision based on factors such as weather conditions and equipment efficiency. This results in significant issues such as water pumps often operating at a fixed frequency, high cooling water outlet temperatures, and the failure to consider the overall energy consumption of the cooling tower when controlling the number of cooling tower fans.

[0003] Utility model patent CN213630850U discloses a global optimal control system for a refrigeration station with an air conditioning load prediction function. The system is mainly composed of a refrigeration station group control management computer, an Ethernet switch, a protocol conversion gateway, a system control cabinet, a global optimal control server, a central control box, a refrigeration machine control cabinet, a refrigeration pump control cabinet, a cooling pump control cabinet, and a cooling tower control cabinet. Each control cabinet is connected by a data cable. The global optimal control server has a built-in load prediction and optimal control algorithm, the refrigeration machine control cabinet has a built-in refrigeration machine control program, the refrigeration pump control cabinet has a built-in refrigeration pump control program, the cooling pump control cabinet has a built-in cooling pump control program, and the cooling tower control cabinet has a built-in cooling tower fan control program. This utility model can solve the problem that traditional refrigeration stations cannot achieve the highest efficiency of the refrigeration station system due to the use of local optimal control, and is conducive to precise control of air conditioning temperature. However, it mainly relies on the built-in load prediction and optimal control algorithm of the global optimal control server for control, which makes the control relatively complex.

[0004] Utility model patent CN206724419U discloses an intelligent control system for a water-cooled central refrigeration station. Multiple water-cooled chillers are connected in parallel between the chilled water manifold and the water collector. On the chilled water side of the chiller, multiple parallel chilled water pumps are installed at the chilled water inlet. On the cooling water side of the chiller, multiple parallel cooling water pumps are installed at the cooling water inlet, and the cooling water outlet is connected to multiple parallel cooling towers. A cloud terminal control device is provided, which is connected to a cloud server via a network. The chiller controller, chilled water pump inverter, cooling water pump inverter, and cooling tower fan inverter are all connected to the cloud terminal control device. This utility model cloud terminal control device can collect the operating parameters of the central refrigeration station in real time and upload them to the cloud server. Through the cloud terminal control device, the cloud server can achieve centralized monitoring and management of various equipment in the refrigeration station, effectively improving control efficiency and achieving optimized control. However, it mainly relies on the cloud server to realize the centralized monitoring and management of various equipment in the refrigeration station through the cloud terminal control device. If the cloud server fails, the refrigeration station cannot be controlled and the entire refrigeration station will not be effectively controlled.

[0005] How to adjust the system operation in a timely manner and consider it from the perspective of the overall energy consumption of the refrigeration station is an issue that needs to be solved urgently. Utility Model Content

[0006] To address the limited and complex operational efficiency of refrigeration stations in existing technologies, this utility model proposes an intelligent refrigeration station control system. By integrating field sensors, a PLC master control unit 300, and a server, this intelligent refrigeration station control system enables comprehensive monitoring and control of the refrigeration station's pipe network and terminal units.

[0007] In order to achieve the above-mentioned purpose, the present utility model provides the following technical solutions.

[0008] The utility model provides an intelligent control system for a refrigeration station, including a field sensor, an actuator, a PLC master control unit and a server;

[0009] The field sensors are arranged in the pipe network and are used to collect feedback data from the pipe network;

[0010] The PLC master control unit is used to obtain feedback data from the field sensors and store it in the server; the server sends control instructions to the actuators of the terminal units in the pipe network through the PLC master control unit for execution;

[0011] The field sensor includes a control instrument and a detection instrument; the control instrument and the detection instrument are both connected to the input end of the PLC master control unit, and the actuator is connected to the output end of the PLC master control unit; the control instrument and the detection instrument are arranged on the terminal unit in the pipe network.

[0012] Optionally, the detection instrument includes: a meteorological instrument, a smart electric meter, a temperature transmitter, a flow meter, a cold and heat meter;

[0013] The meteorological instrument is connected to the input end of the PLC master control unit via Ethernet.

[0014] Optionally, the smart meter is installed on the energy-consuming device of the terminal unit, and each energy-consuming device is provided with a smart meter; the meteorological instrument is installed outdoors, and the temperature transmitter, flow meter, and heat and cold meter are all provided on the terminal unit.

[0015] Optionally, the control instrument includes a frequency converter.

[0016] Optionally, the actuator includes an electronic valve.

[0017] Optionally, the terminal unit includes a chiller, a cooling tower, a chilled water pump, a medium-temperature water secondary circulation pump, a cooling water pump, and a heat recovery warm water circulation system.

[0018] Optionally, the server is also connected to a control center.

[0019] Optionally, the PLC master control unit is connected to the server via a switch based on Ethernet.

[0020] Optionally, the server is deployed in a server cabinet in a monitoring room.

[0021] Optionally, the PLC master control unit is connected to the terminal unit via a serial bus;

[0022] The PLC master control unit is connected to the control instrument via hard wiring;

[0023] The PLC master control unit is connected to the detection instrument via a serial bus;

[0024] The PLC master control unit is connected to the actuator via hard wiring.

[0025] Compared with the prior art, the present invention has the following beneficial effects:

[0026] The entire refrigeration station intelligent control system achieves a high degree of intelligence and automation. Through data acquisition from field sensors, data processing by the PLC master control unit, optimized control by servers, and precise execution by control instruments and actuators, the system automatically adjusts its operating status to adapt to changes in the external environment and internal demand. This intelligent and automated nature not only improves system efficiency but also reduces the cost and risk of manual intervention. By integrating multiple devices, this refrigeration station intelligent control system achieves comprehensive monitoring and control of the refrigeration station's pipeline network and terminal units, offering significant advantages and broad application prospects. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The drawings described herein are for illustrative purposes only and are not intended to limit the scope of the present invention in any way. In addition, the shapes and proportional dimensions of the components in the drawings are merely schematic and are used to help understand the present invention, and are not intended to specifically limit the shapes and proportional dimensions of the components of the present invention. In the drawings:

[0028] Figure 1 This is a schematic diagram of an intelligent control system for a refrigeration station provided by the utility model;

[0029] Figure 2 This is a schematic diagram of the arrangement of field sensors of the present utility model;

[0030] In the figure, 100, server, 200, switch, 201, Ethernet, 202, hard wiring, 203, serial bus, 300, PLC master control unit, 401, meteorological instrument, 402, chiller, 403, cooling water pump, 404, chilled water pump, 405, cooling tower, 406, heat recovery warm water circulation system, 407, medium temperature water secondary circulation pump, 408, smart meter, 409, control instrument, 410, detection instrument, 411, actuator, 412, temperature transmitter, 413, flow meter, 414, electronic valve, 415, pressure transmitter, 416, frequency converter, 417, heat and cold meter, 500, control center. DETAILED DESCRIPTION

[0031] In order to enable those skilled in the art to better understand the technical solutions of the present invention, the following will be combined with the drawings of the embodiments of the present invention to clearly and completely describe the technical solutions of the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts should fall within the scope of protection of the present invention.

[0032] It should be noted that when an element is referred to as being "disposed on" another element, it may be directly on the other element or there may be an element centered thereon. When an element is referred to as being "connected to" another element, it may be directly connected to the other element or there may be an element centered thereon. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only embodiments.

[0033] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which this invention pertains. The terms used herein in the specification of this invention are for the purpose of describing specific embodiments only and are not intended to limit the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0034] like Figure 1 and Figure 2 As shown, the present invention provides an intelligent control system for a refrigeration station, including field sensors, actuators 411, a PLC master control unit 300 and a server 100; the field sensors are arranged in a pipe network to collect feedback data from the pipe network; the PLC master control unit 300 is used to obtain feedback data from the field sensors and store it in the server 100; the server 100 sends control instructions to the actuator 411 of the terminal unit in the pipe network through the PLC master control unit 300 for execution.

[0035] The field sensor includes a control instrument 409 and a detection instrument 410; the control instrument 409 and the detection instrument 410 are both connected to the input end of the PLC master control unit 300, and the actuator 411 is connected to the output end of the PLC master control unit 300; the control instrument 409 and the detection instrument 410 are arranged on the terminal unit in the pipe network.

[0036] The PLC master control unit 300 offers the advantages of efficient data processing and command transmission. As the core of the system, it receives, stores, and initially processes feedback data from field sensors. Simultaneously, it transmits operational status and parameter information to the server 100 based on the processing results. The server 100 then transmits control commands to the actuators of the terminal units in the pipe network via the PLC master control unit 300. This efficient data processing and command transmission mechanism ensures timely and accurate system responses.

[0037] Server 100, the system's hub, not only stores a large amount of data but also develops optimization control strategies based on data analysis results. The specific optimization process is not described in this utility model and can be treated as a conventional optimization. Through centralized management, the server can achieve comprehensive monitoring and intelligent control of the entire refrigeration station system, further improving the system's operating efficiency and energy conservation.

[0038] This utility model mainly builds a hardware system, relying on relatively simple, preset logic or rules, which are specifically described as follows:

[0039] Preset logic control: A series of logic judgment and control rules are preset in the PLC master control unit. For example, when the detection instrument 410 detects that a temperature exceeds a preset threshold, the PLC master control unit directly triggers the actuator 411 to reduce the temperature. This method is simple and direct, but lacks flexibility and adaptability, and cannot dynamically adjust the control strategy based on real-time data.

[0040] Mechanical controllers: Mechanical controllers (such as temperature controllers, pressure controllers, etc.) can be used as an alternative. These controllers usually have preset thresholds and simple control logic, automatically triggering corresponding actions when a certain condition is met.

[0041] The present invention mainly reflects the control method using the server 100 and the PLC master control unit 300, and the specific optimization method is not specifically limited.

[0042] As a specific solution, the detection instrument 410 includes: a meteorological instrument 401, a smart electric meter 408, a temperature transmitter 412, a flow meter 413, and a heat and cold meter 417; the meteorological instrument 401 is connected to the input end of the PLC control unit 300 via Ethernet 201.

[0043] Therefore, on-site sensors enable diverse and accurate data collection. The system is equipped with a variety of on-site sensors, such as a meteorological instrument 401, a smart meter 408, a temperature transmitter 412, a flow meter 413, and a heat and cold meter 417. These sensors can comprehensively and accurately collect various data from the pipe network, including ambient temperature, energy consumption, flow, temperature, and heat and cold quantities. This diverse data collection method provides a solid foundation for the efficient operation of the refrigeration station.

[0044] More specifically, the precise coordination of control instrumentation 409 (e.g., inverter 416) and actuator 411 (e.g., electronic valve 414) enables precise control of terminal units (e.g., chiller 402, cooling tower 405, etc.). This control method allows for adjustments to the operating state of the equipment based on actual operational needs, such as adjusting the speed of the water pump and opening and closing valves, to achieve optimal cooling performance and energy efficiency.

[0045] As an example, the smart meter 408 is installed on the energy-consuming device of the terminal unit, and each energy-consuming device is equipped with a smart meter 408; the meteorological instrument 401 is installed outdoors, and the temperature transmitter 412, flow meter 413, and cold and heat meter 417 are all set on the terminal unit.

[0046] The control instrument 409 includes a frequency converter 416 , and the actuator 411 includes an electronic valve 414 .

[0047] The terminal unit of the present invention includes a chiller 402, a cooling tower 405, a chilled water pump 404, a medium-temperature water secondary circulation pump 407, a cooling water pump 403, and a heat recovery warm water circulation system 406. The terminal unit and field sensors can be selected and configured according to specific application scenarios to meet the needs of different refrigeration stations.

[0048] The system's terminal unit encompasses the refrigeration station's primary equipment, such as the chiller, cooling tower, and pumps. By comprehensively monitoring and precisely controlling these devices, the system ensures efficient operation of the entire refrigeration station. This design also facilitates system maintenance and upgrades, improving reliability and scalability.

[0049] Field sensors (including detection instruments and control instruments) are deployed on the pipe network and terminal units to collect various operating parameters in real time, such as temperature, flow, energy consumption, and ambient weather conditions. The detection instruments (such as meteorological instruments, smart meters, temperature transmitters, flow meters, and heat and cold meters) transmit the collected data to the PLC control unit 300 via wired or wireless means (such as Ethernet).

[0050] The PLC control unit 300 receives data from field sensors and stores it on the server. The server 100, acting as a data storage and processing center, can preserve historical data over the long term and select control strategies based on data analysis results. Based on the data analysis results and pre-set control logic, the server 100 generates control instructions and transmits them to the actuators of the terminal units via the PLC control unit 300. The actuators (e.g., electronic valves, inverters, etc.) adjust the operating status of the terminal units based on the received control instructions, such as adjusting the pump speed or opening and closing valves.

[0051] The server 100 is also connected to the management and control center 500, allowing management personnel to monitor the operating status of the refrigeration station in real time through a remote interface and perform necessary intervention and management.

[0052] The system comprehensively monitors the refrigeration station's pipeline network and terminal units through a variety of on-site sensors, collecting and processing large amounts of operational data in real time. Optimized control strategies developed based on data analysis enable precise control of the terminal units, improving refrigeration efficiency and energy savings. The system is highly intelligent and automated, automatically adjusting its operating status to adapt to changes in the external environment and internal demand. This reduces the need for manual intervention, lowering operating costs and risks. By connecting to a control center, managers can remotely monitor the refrigeration station's operating status and implement necessary intervention and management.

[0053] The following is a detailed description of the present invention using specific embodiments:

[0054] This utility model proposes an intelligent control system for refrigeration stations by studying the operating principle and equipment operating efficiency of refrigeration stations. Figure 1 and Figure 2 As shown, the intelligent control system of the refrigeration station includes field sensors, actuator valves, a PLC master control unit 300, a switch 200 and a server 100;

[0055] The field sensors include a smart meter 408, a temperature transmitter 412, a flow meter 413, a heat and cold meter 417, etc. The smart meter 408 is installed on the energy-consuming equipment, one meter for each equipment; the meteorological instrument 401 is installed outdoors, and the remaining field sensors are installed on the pipe network.

[0056] The PLC master control unit 300 is installed in the on-site control cabinet, and collects data from on-site sensors (temperature, pressure, wet-bulb temperature, pressure difference, valve opening, etc.) through electrical signals, and exchanges data and issues operation commands with the equipment in the station through the serial bus 2023 (such as RS485 interface), and completes the equipment chain; receives the system operation strategy issued by the server 100, parses it into control commands such as equipment start and stop, frequency setting, valve opening, etc., and completes the command execution.

[0057] Server 100, deployed in the server cabinet in the monitoring room, collects and analyzes field and equipment data collected by the PLC master control unit 300, stores it, and invokes system operation strategies for execution via the PLC master control unit 300. System operation strategies are built-in programs in server 100 and can be directly invoked without requiring algorithm writing or calculation.

[0058] For example, the server 100 of the present invention can adopt the global optimal control server in CN213630850U. The present invention does not improve the internal program and algorithm of the server 100.

[0059] The intelligent control system of the refrigeration station mainly controls the chiller 402, cooling tower 405, cooling water pump 403, chilled water pump 404, heat recovery warm water circulation pump 406, medium temperature water secondary circulation pump 407, etc.; the controlled objects, the cooling tower 405 has a speed regulation function, and various water pumps have a frequency conversion function.

[0060] More specifically, the PLC master control unit 300 is connected to the server 100 via the switch 200 based on the Ethernet 201. The PLC master control unit 300 is connected to the terminal unit via the serial bus 203; the PLC master control unit 300 is connected to the control instrument 409 via the hard wiring 202; the PLC master control unit 300 is connected to the detection instrument 410 via the serial bus 203; and the PLC master control unit 300 is connected to the actuator 411 via the hard wiring 202.

[0061] Optional, signal acquisition method selection:

[0062] 1) Equipment communication: For equipment and terminal units with their own control systems (such as chillers 402, cooling towers 405, cooling water pumps 403, chilled water pumps 404, heat recovery warm water circulation pumps 406, medium-temperature water secondary circulation pumps 407, etc.), their operating parameters are read through a data gateway or serial bus 203.

[0063] 2) Hard-wired 202 monitoring: For control points and status feedback related to equipment safety protection and control, hard-wired monitoring is used for centralized monitoring. Examples include valve switch control and status feedback, and equipment start / stop control and status monitoring.

[0064] 3) Instrument communication: For the monitoring of flow rate, heat exchange capacity, power parameters, temperature and humidity and other parameters, communication is used to read data from the instrument.

[0065] 4) Remote transmission instrument: For monitoring of parameters involved in control such as pressure and temperature, 4-20mA signal instrument is used for monitoring.

[0066] The PLC master control unit 300 controls the safety interlocking relationship of valves, water pumps, and cooling towers according to the operating conditions of the chiller, and controls the pressure, temperature, and water quality conditions of the water system to ensure the normal operation of the refrigeration system.

[0067] The system uses efficient data transmission methods such as Ethernet to ensure the real-time and accuracy of data.

[0068] The server can store historical data for a long time, providing strong support for subsequent data analysis and optimization control.

[0069] The server 100 is deployed in the server cabinet of the monitoring room, collects and analyzes the field and equipment data collected by the PLC master control unit 300, decomposes the results into control commands such as equipment start and stop, frequency setting, valve opening, etc., and sends them to the terminal for execution through the PLC master control unit 300.

[0070] In order to achieve remote control, the server 100 of the present invention is also connected to a control center 500 .

[0071] This utility model controls the existing refrigeration station. After being put into normal use, it can realize 24-hour non-stop, year-round automatic energy-saving operation of the refrigeration station system, reduce energy consumption and lower production costs. The original manual or automatic control of the refrigeration station equipment is unified to reduce the energy consumption of the entire system.

[0072] Many embodiments and applications beyond the examples provided will be apparent to those skilled in the art upon reading the foregoing description. Therefore, the scope of the present teachings should be determined not with reference to the foregoing description, but rather with reference to the preceding claims, along with the full scope of equivalents to which such claims are entitled. For the purpose of completeness, all articles and references, including the disclosures of patent applications and publications, are incorporated herein by reference. The omission of any aspect of the subject matter disclosed herein from the preceding claims is not a disclaimer of such subject matter, nor should it be construed that the applicants did not consider such subject matter to be part of the disclosed utility model subject matter.

[0073] The above content is a further detailed description of the utility model. It cannot be determined that the specific implementation methods of the utility model are limited to this. For ordinary technicians in the technical field to which the utility model belongs, they can make several simple deductions or substitutions without departing from the concept of the utility model, which should be regarded as belonging to the scope of protection of the utility model determined by the submitted claims.

Claims

1. An intelligent control system for a refrigeration station, characterized in that: It includes a field sensor, an actuator (411), a PLC master control unit (300), and a server (100); The field sensors are arranged in the pipe network and are used to collect feedback data from the pipe network; The PLC master control unit (300) is used to obtain feedback data from the field sensor and store it in the server (100); the server (100) sends a control instruction to the actuator (411) of the terminal unit in the pipe network through the PLC master control unit (300); The field sensor comprises a control instrument (409) and a detection instrument (410); the control instrument (409) and the detection instrument (410) are both connected to the input end of the PLC master control unit (300), and the actuator (411) is connected to the output end of the PLC master control unit (300); the control instrument (409) and the detection instrument (410) are arranged on a terminal unit in the pipe network.

2. The intelligent control system for a refrigeration station according to claim 1, characterized in that: The detection instrument (410) includes: a meteorological instrument (401), a smart electric meter (408), a temperature transmitter (412), a flow meter (413), and a heat and cold meter (417); The meteorological instrument (401) is connected to the input end of the PLC master control unit (300) via Ethernet (201).

3. The intelligent control system for a refrigeration station according to claim 2, characterized in that: The smart meter (408) is installed on the energy-consuming equipment of the terminal unit, and each energy-consuming equipment is provided with a smart meter (408); the meteorological instrument (401) is installed outdoors, and the temperature transmitter (412), flow meter (413), and heat and cold meter (417) are all provided on the terminal unit.

4. The intelligent control system for a refrigeration station according to claim 1, characterized in that: The control instrument (409) includes a frequency converter (416).

5. The intelligent control system for a refrigeration station according to claim 1, characterized in that: The actuator (411) includes an electronic valve (414).

6. The intelligent control system for a refrigeration station according to claim 1, characterized in that: The terminal unit includes a chiller (402), a cooling tower (405), a chilled water pump (404), a medium-temperature water secondary circulation pump (407), a cooling water pump (403), and a heat recovery warm water circulation system (406).

7. The intelligent control system for a refrigeration station according to claim 1, characterized in that: The server (100) is also connected to a control center (500).

8. The intelligent control system for a refrigeration station according to claim 1, characterized in that: The PLC master control unit (300) is connected to the server (100) via a switch (200) based on Ethernet (201).

9. The intelligent control system for a refrigeration station according to claim 8, characterized in that: The server (100) is deployed in a server cabinet in a monitoring room.

10. The intelligent control system for a refrigeration station according to claim 1, characterized in that: The PLC master control unit (300) is connected to the terminal unit via a serial bus (203); The PLC master control unit (300) is connected to the control instrument (409) via hard wiring (202); The PLC master control unit (300) is connected to the detection instrument (410) via a serial bus (203); The PLC master control unit (300) is connected to the actuator (411) via hard wiring (202).

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