Centralized control method and system for air conditioner room

Abstract

The invention relates to the technical field of machine room energy management and control, and discloses an air conditioner machine room centralized control method and system, and the system comprises a centralized management monitoring layer which employs a work station as an upper computer to monitor all electromechanical devices of an energy station in a unified manner; in the equipment layer, data acquisition and monitoring of the air conditioning unit are realized in a bus communication mode; in the field layer, a metering instrument, a sensor and an electric control execution device are used for data acquisition and execution control; and economical supply of energy is realized through the data acquisition system. According to the method, a DCS (Distributed Control System) is matched with an on-site PLC (Programmable Logic Controller) and an on-site intelligent instrument to realize automatic control of an energy center; through a field bus communication mode, instruction control is carried out on operation of the electromechanical equipment group of the energy station, and complete acquisition of equipment and process data is completed, so that the purposes of unified scheduling and energy conservation are achieved. Through transformation and access of the frequency conversion cabinet, the water flow can be accurately adjusted by tracking the load change, so that energy is greatly saved.

Description

Technical Field

[0001] The present invention relates to the technical field of computer room energy management and control, and in particular to a centralized control method and system for an air-conditioning computer room. Background Art

[0002] At present, air conditioning equipment consumes a huge amount of energy, but lacks centralized control system functions, making equipment operation and management difficult, and the current operating mechanism makes it difficult to maximize the efficiency of the equipment. The automation level of the air-conditioning room system lags behind that of the same industry, and is heavily dependent on manual operation, which puts great pressure on operation. The power equipment in the room consumes a lot of power and is numerous. In addition to the isolated adjustment function of the main unit, the system has no host linkage adjustment and power equipment has no frequency conversion adjustment, which may lead to serious waste. The system has no mechanism for remote collection, unified management, and storage of energy consumption. The refined energy management does not have a reliable hardware foundation and sufficient data accumulation, which will make it difficult to effectively carry out energy management in the later stage.

[0003] At the beginning of the project construction, the design of the intelligent computer room was relatively extensive. The energy-intensive transmission and distribution system did not have a frequency conversion cabinet, resulting in a large amount of ineffective energy consumption, and it was urgent to rectify it into a frequency conversion system. The computer room did not have a fully automated air-conditioning centralized control system. The start and stop and operation of the air-conditioning host and auxiliary equipment all relied on manual operations. It was urgent to introduce a highly automated air-conditioning intelligent control system. Air-conditioning energy consumption statistics, energy efficiency comparisons, and equipment operating condition change trends are very helpful in improving the logistics management of the building. It is necessary to do a good job in data collection and statistical processing, and introduce a data management system. Air-conditioning energy consumption accounts for a large proportion of building energy, and it is necessary to collect advanced control technologies in the industry to manage the energy-saving operation of equipment, thereby creating considerable value for users. The average time is used to balance the equipment usage time and frequency, thereby ensuring that each device is in a relatively good state. The logic of switching the main pump to the standby pump after a fault signal can ensure the safe and stable operation of the system.

[0004] Through the data such as the accumulated equipment operation time and the frequency of failures, the management personnel are reminded to maintain or replace the aging equipment in time to ensure the safe and stable operation of the system. The most advanced Internet of Things technology and cloud monitoring technology are used to interconnect the equipment and operate in linkage. The operation personnel or management personnel can check the working condition of the equipment in the computer room and manage the equipment at any time and place through the authority management. After the system transformation, the automation level and energy saving level of the computer room system can be greatly improved. According to the project characteristics of the building, the "air conditioning station intelligent centralized control system" was established. The reliable PLC automatic control system is used to design the control logic according to the energy-saving operation on site, reasonably adjust the equipment operation status, and provide energy management analysis for the building. After the system transformation, the automation level of the air conditioning room can be greatly improved. Summary of the invention

[0005] In view of the above existing problems, the present invention is proposed.

[0006] Therefore, the present invention provides a centralized control method for an air-conditioning room, which can realize automatic control of the energy center through a central air-conditioning group control system, a data acquisition system and a host monitoring system, by a DCS distributed control system in cooperation with a field PLC controller and field intelligent instruments; through a field bus communication method, the operation of the electromechanical equipment group of the energy station is commanded and controlled, and the equipment and process data are fully collected, thereby achieving the purpose of unified scheduling and energy saving; through the modification and access of the frequency conversion cabinet, the load changes can be tracked and the water flow can be accurately adjusted, thereby greatly saving energy.

[0007] In order to solve the above technical problems, the present invention provides the following technical solutions, a centralized control method for an air-conditioning room, comprising: a centralized management and monitoring layer, using a workstation as a host computer to uniformly monitor various electromechanical equipment in the energy station; at the equipment layer, data collection and monitoring of the air-conditioning unit are realized through bus communication; at the field layer, data collection and execution control are performed using metering instruments, sensors and electronic control execution devices; and economical supply of energy is realized through a data acquisition system.

[0008] As a preferred solution of the centralized control method for an air-conditioning room described in the present invention, wherein: the centralized management and monitoring layer includes configuring a centralized control cabinet to realize centralized control, energy-saving operation and remote monitoring functions of the main energy equipment in the room.

[0009] As a preferred solution of the centralized control method of an air-conditioning room described in the present invention, the centralized management and monitoring layer also includes a host device parameter monitoring function, which accesses the host data interface through the modbus bus technology to read and display important host data.

[0010] As a preferred solution of the centralized control method of an air-conditioning room described in the present invention, the equipment layer includes: connecting to pipeline sensors, comprehensively acquiring system operating data, and analyzing the converted load degree;

[0011] The frequency conversion and switching of the power unit are adjusted according to the operating condition data to perform automatic operation and energy-saving operation. Various electromechanical equipment and intelligent instruments are connected to the system through the bus to realize the collection and monitoring of operating parameters.

[0012] As a preferred solution of the centralized control method of an air-conditioning room described in the present invention, the field layer includes that all main energy sources and information flows within the station enter the system for centralized and unified screen monitoring, and through energy scheduling monitoring, the energy supply is adjusted, and all energy data and real-time status of system operation can be intuitively viewed.

[0013] As a preferred solution of the centralized control method of an air-conditioning room described in the present invention, the data collection and execution control include: using PLC programmable logic control mode and serial port communication interface to collect data, monitor various process parameters of the pipeline system, perform system control on the equipment in the room and the transmission and distribution system according to the load, accurately track the user load, and perform centralized data collection and command control on the operating conditions of the electromechanical equipment group of the energy station through the field bus communication mode;

[0014] By setting up pressure transmitters and temperature and humidity transmitters, the pressure difference PID adjustment and antifreeze protection of the air conditioning water pipeline are realized, and the temperature threshold dynamic adjustment model is introduced:

[0015] T set =T base +K f ·(T amb -T min )

[0016] Among them, T set is the new set temperature, T base is the base set temperature, K f is the temperature adjustment factor, T amb is the ambient temperature, T min It is the minimum temperature threshold for antifreeze protection; the temperature and humidity transmitter monitors the water pipe temperature, and the PLC dynamically adjusts the antifreeze protection temperature threshold according to the above formula. When the temperature is lower than the threshold, the antifreeze protection measures are started;

[0017] The host parameters are read through the MODBUS interface, and the unit is started and stopped through communication or dry contacts. The system selects manual start and stop of the chilled water pump or automatic operation of the water pump. The water pump operating frequency is manually set in manual mode, and the water pump operating frequency is automatically adjusted according to the temperature difference or load value of the cold water main in automatic mode.

[0018] As a preferred solution of the centralized control method of an air-conditioning room described in the present invention, the economic supply of energy includes accumulating and counting the running time of each device, switching the main device according to the equal running time strategy of the devices, so that each device in the system is effectively utilized;

[0019] Allows the system to automatically adjust non-critical loads during peak hours, reducing overall energy demand, quickly locate system faults through data analysis, reduce maintenance response time, and perform troubleshooting and system upgrades through remote access;

[0020] Set equipment maintenance time and compare it with operating time to remind you of maintenance time. After maintenance is confirmed, re-accumulate operating time to automatically manage equipment.

[0021] Another object of the present invention is to provide an air-conditioning room centralized control system, which can achieve efficient, energy-saving and intelligent management of the air-conditioning room by integrating advanced data acquisition, processing and control technologies, and improve the economy, reliability and safety of energy supply.

[0022] As a preferred solution of the centralized control system of an air-conditioning room described in the present invention, it includes: a centralized monitoring management module, a data acquisition and monitoring module, a field control module, an energy scheduling monitoring module, and an equipment maintenance management module;

[0023] The centralized monitoring and management module, as a workstation of the host computer, provides a unified monitoring platform to realize centralized monitoring and management of various electromechanical equipment in the energy station, and configures a centralized control cabinet to realize centralized control, energy-saving operation and remote monitoring functions of the equipment;

[0024] The data acquisition and monitoring module accesses the data of the air-conditioning unit through bus communication to realize the collection and monitoring of the equipment operation parameters, accesses the pipeline sensor, comprehensively obtains the system working condition data, analyzes the converted load degree, and adjusts the frequency conversion and switching of the power device to realize automatic operation and energy-saving operation;

[0025] The field control module uses metering instruments, sensors and electronic control actuators to collect field data and perform execution control, uses PLC programmable logic controllers and serial port communication interfaces to monitor various process parameters of the pipeline system, performs system control on the equipment in the machine room and the transmission and distribution system, and accurately tracks user loads;

[0026] The energy dispatch monitoring module provides centralized and unified visual monitoring of all major energy sources and information flows within the station. Through energy dispatch monitoring, it adjusts energy supply and intuitively views all energy data and real-time status of system operation.

[0027] The equipment maintenance management module accumulates and counts the operating time of each device, switches the main device according to the equal operating time strategy of the devices, ensures that each device in the system is effectively utilized, and automatically manages the equipment maintenance process.

[0028] A computer device includes a memory and a processor, wherein the memory stores a computer program, and is characterized in that when the processor executes the computer program, the processor implements the steps of a centralized control method for an air conditioning room.

[0029] A computer-readable storage medium stores a computer program, wherein the computer program, when executed by a processor, implements the steps of a centralized control method for an air conditioning room.

[0030] Beneficial effects of the present invention: This method adopts mature and well-performing technologies, equipment, and platforms based on the characteristics of the process flow of the HVAC system to ensure that the system has a long life cycle, can meet current needs, adapt to future development, and provide 24-hour continuous operation. The installed PLC controllers, servers, terminal devices, network devices, control devices, and wiring systems must be able to adapt to the on-site working environment to ensure system stability. Provide easy-to-use database functions so that users can query information and make required reports at any time. Focus on information sharing among subsystems to improve the efficient transmission and operation capabilities of the entire system.

[0031] The PLC system can be expanded to meet the needs of monitoring, dispatching and managing energy in the later stage of the project. Consider the versatility and openness in the design of the application system and the selection of hardware equipment. When a local failure occurs in the system, the operation and maintenance personnel can find it as soon as possible and deal with it in time to avoid the expansion of the failure and quickly restore normal operation. It has the ability to modify online and provide remote maintainability. To meet the technical requirements, good cost performance, convenient technology and spare parts support services must be considered. The selection of major equipment should meet the system requirements. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work. Among them:

[0033] Figure 1 A schematic flow chart of a centralized control method for an air-conditioning room provided by an embodiment of the present invention.

[0034] Figure 2 A schematic diagram of working modules of an air-conditioning room centralized control system provided by one embodiment of the present invention. DETAILED DESCRIPTION

[0035] In order to make the above-mentioned purposes, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below in conjunction with the drawings of the specification. Obviously, the described embodiments are part of the embodiments of the present invention, but not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary persons in the art without creative work should fall within the scope of protection of the present invention.

[0036] In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein, and those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0037] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The term "in one embodiment" that appears in different places in this specification does not necessarily refer to the same embodiment, nor is it a separate or selective embodiment that is mutually exclusive with other embodiments.

[0038] The present invention is described in detail with reference to schematic diagrams. When describing the embodiments of the present invention, for the sake of convenience, the cross-sectional diagrams showing the device structure will not be partially enlarged according to the general scale, and the schematic diagrams are only examples, which should not limit the scope of protection of the present invention. In addition, in actual production, the three-dimensional dimensions of length, width and depth should be included.

[0039] At the same time, in the description of the present invention, it should be noted that the directions or positional relationships indicated by the terms "upper, lower, inner and outer" are based on the directions or positional relationships shown in the drawings, which are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as limiting the present invention. In addition, the terms "first, second or third" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0040] In the present invention, unless otherwise clearly specified and limited, the terms "install, connect, connect" should be understood in a broad sense, for example: it can be a fixed connection, a detachable connection or an integral connection; it can also be a mechanical connection, an electrical connection or a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0041] Example 1, reference Figure 1 , which is the first embodiment of the present invention, provides an air conditioning room centralized control method, comprising:

[0042] S1: Centralized management and monitoring layer, using the workstation as the host computer to uniformly monitor the various electromechanical equipment in the energy station.

[0043] Furthermore, a centralized control cabinet is configured to realize centralized control, energy-saving operation and remote monitoring functions of the main energy equipment in the computer room.

[0044] It should be noted that the configuration of the centralized control cabinet includes access to the host data interface through the modbus bus technology, which can read and display important data of the host, provide a basis for control and adjustment, and count operating data.

[0045] The host parameters can be read through the MODBUS interface, and the unit can be started and stopped through communication or dry contacts. The air conditioner host can be remotely started and stopped through the touch screen, automatically started and stopped according to the set time or set outdoor temperature, automatically set and adjust the outlet water temperature and temperature difference according to the outdoor temperature, and can be linked with the chilled water pump, while displaying all relevant parameters and alarm information.

[0046] Furthermore, when the centralized control cabinet is started, it automatically executes the self-check program to ensure that all modules are working properly. Through the customized configuration interface, parameters are set for each module, including device type, control strategy, energy saving target and remote monitoring parameters. The control logic based on event triggering is adopted instead of the traditional timed polling. When the device status changes, the sensor sends the event signal to the centralized control cabinet. The centralized control cabinet activates the control strategy of the corresponding module according to the event type, and the control module outputs instructions to the actuator to realize real-time control of the device.

[0047] The centralized control cabinet communicates with the central monitoring center through a secure remote connection, transmitting equipment status, energy consumption data and system alarm information in real time. The central monitoring center can send remote commands to the centralized control cabinet for emergency operations or system adjustments.

[0048] S2: At the equipment level, data collection and monitoring of the air-conditioning unit are realized through bus communication.

[0049] Furthermore, pipeline sensors are connected to fully obtain system operating data and analyze the converted load level;

[0050] The frequency conversion and switching of the power unit are adjusted according to the operating condition data to perform automatic operation and energy-saving operation. Various electromechanical equipment and intelligent instruments are connected to the system through the bus to realize the collection and monitoring of operating parameters.

[0051] It should be noted that the system has manual / automatic control functions. In manual mode, all controlled electromechanical equipment can be started individually, and in automatic mode, energy-saving automatic operation can be performed according to customized strategies; various electromechanical equipment and intelligent instruments are connected to the system through the bus, and the operating parameters of the system equipment in the station are collected and monitored through the transmitter, such as temperature, pressure, flow, electricity, energy power, etc. The system flow chart, system energy consumption statistics, cooling capacity statistics and other monitoring displays are displayed.

[0052] S3: At the field level, metering instruments, sensors and electronically controlled actuators are used for data collection and execution control.

[0053] Furthermore, all major energy sources and information flows within the station enter the system for centralized and unified visual monitoring. Through energy scheduling monitoring, energy supply can be adjusted, and all energy data and real-time status of system operation can be intuitively viewed.

[0054] It should be noted that PLC programmable logic control and serial port communication interface are used for data collection, monitoring of various process parameters of the pipeline system, system control of the equipment in the machine room and the transmission and distribution system according to the load, accurate tracking of user load, and centralized data collection and command control of the operating conditions of the electromechanical equipment group of the energy station through field bus communication;

[0055] By setting up pressure transmitters and temperature and humidity transmitters, the differential pressure PID adjustment and antifreeze protection of the air conditioning water pipeline are realized. The differential pressure PID of the air conditioning water inlet and outlet adjusts the pump frequency, and the minimum frequency corresponds to the farthest pressure lower limit. The differential pressure PID of the air conditioning water inlet and outlet adjusts the proportional valve (AO / AI), with frequency conversion adjustment first, and then proportional valve adjustment; the antifreeze protection introduces a dynamic adjustment model of the temperature threshold:

[0056] T set =T base +K f ·(T amb -T min )

[0057] Among them, T set is the new set temperature, T base is the base set temperature, K f is the temperature adjustment factor, T amb is the ambient temperature, T min It is the minimum temperature threshold for antifreeze protection; set the outdoor temperature and humidity transmitter and the pipe temperature transmitter. During the winter shutdown period, when the outdoor temperature is below -2 degrees, start the air conditioning water pipe antifreeze program: start the air conditioning water pump, and when the outdoor temperature is below -2 degrees and the pipe temperature is below 5 degrees, start the heat pump host. On the contrary, if the pipe temperature is higher than 6, the heat pump can be stopped, and when the outdoor temperature is higher than 0 degrees, the air conditioning water pump can be stopped (the above temperatures can be set).

[0058] Furthermore, the host parameters are read through the MODBUS interface, and the unit is started and stopped through communication or dry contacts. The system chooses to manually start and stop the chilled water pump or automatically run the pump. In manual mode, the pump operating frequency is manually set, and in automatic mode, the pump operating frequency is automatically adjusted according to the temperature difference or load value of the cold water main.

[0059] Collect the total inlet and outlet temperature and pressure of chilled water at the load end, automatically predict the load, adjust the number of air-conditioning units and water pump frequency regulation, and accurately track the load.

[0060] It should be noted that the principle of group control of the unit is that when the host is turned on and controlled, when cooling is carried out, the unit's cold water electric butterfly valve is opened - the cold water pump is started - the unit's cooling water electric butterfly valve is opened - the cooling tower is turned on, the electric butterfly valve is turned on - the cooling water pump is started - the unit is running - the cooling tower fan is started and stopped as needed;

[0061] The specific process of water pump control includes:

[0062] (1) The chilled water pipeline of the air-conditioning unit has three pumps in parallel: according to the pipeline pressure difference control, if the pressure difference is too large, more pumps will be turned on or the frequency will be increased by frequency conversion, otherwise, fewer pumps will be turned off or the frequency will be reduced by frequency conversion. In addition, the running time of each pump will be balanced, and the pump with less running time will be turned on first.

[0063] (2) The cooling water pipeline of the air-conditioning unit has three pumps in parallel. According to the pressure difference control of the pipeline, if the pressure difference is too large, more pumps will be turned on or the frequency will be increased by frequency conversion. Otherwise, fewer pumps will be turned off or the frequency will be reduced by frequency conversion. In addition, the running time of each pump will be balanced, and the pump with less running time will be turned on first.

[0064] S4: Realize economical supply of energy through data acquisition system.

[0065] Furthermore, the running time of each device is accumulated and counted, and the main device is switched according to the equal running time strategy of the devices, so that each device in the system can be effectively utilized;

[0066] Allows the system to automatically adjust non-critical loads during peak hours, reducing overall energy demand, quickly locate system faults through data analysis, reduce maintenance response time, and perform troubleshooting and system upgrades through remote access;

[0067] Set equipment maintenance time and compare it with operating time to remind you of maintenance time. After maintenance is confirmed, re-accumulate operating time to automatically manage equipment.

[0068] Furthermore, the equipment operation status and fault status are monitored in real time. When the main equipment fails, it automatically switches to the backup equipment to ensure the smooth operation of the system. The system can manually start and stop the water replenishment and drug dosing system. It monitors the pipeline pressure and issues a timely warning when the pressure is insufficient, and starts the water replenishment program. Drug dosing and other equipment can also be started according to the system operation time.

[0069] The system has fault detection and alarm functions. When a fault occurs during the operation of the air-conditioning system, the alarm information can be displayed on the touch screen, and the event report can be automatically (periodically) or manually exported on the touch screen, including the content of the alarm information, the time of occurrence and other relevant information.

[0070] Multifunctional electricity meters are installed on multiple main machines, multiple sets of electrical control cabinets (water pump frequency conversion and auxiliary equipment power supply), and auxiliary power distribution lines to count the total power consumption and power consumption of each equipment, and perform energy efficiency calculations and single equipment efficiency analysis.

[0071] Embodiment 2, an embodiment of the present invention, provides a centralized control method for an air-conditioning room. In order to verify the beneficial effects of the present invention, scientific demonstration is carried out through experiments.

[0072] The pressure sensor is used to obtain the pressure values ​​of water supply and return water. On the one hand, it can provide high-pressure and low-pressure protection, and on the other hand, the difference between the two pressure values ​​is the pressure difference. The pressure difference can indirectly feedback the terminal load, because at the same flow rate, the module fan coil reaches the control temperature, closes the two-way valve, and increases the system resistance coefficient, and the pressure difference will increase. When the actual pressure difference of the system is greater than the set pressure difference, the pump frequency is reduced, and the head and flow are reduced at the same time, achieving energy saving.

[0073] Water supply is 1.3 MPa, return water is 1.1 MPa 1.3-1.1=0.2 MPa. According to the system debugging results, the pressure difference of 0.2 MPa meets the system requirements.

[0074] The system cooling water pump is adjusted according to the cooling return water temperature, because after a lot of experiments, the host is most energy-efficient when the cooling return water is 30℃.

[0075] When the system load increases, the water supply temperature rises, and the return water temperature also rises. The system increases the cooling capacity by increasing the speed of the cooling water pump and cooling fan to ensure that the return water temperature is stable in the range of 28-30℃. Compared with the fixed operation before the transformation, energy saving is more than 10%.

[0076] To ensure that the pumps and fans are not affected in case of failure, at least one spare pump and fan is kept for each group. When the load is small, two pumps are actually idle. Evenly using the pumps can avoid frequent maintenance due to excessive use of a particular pump.

[0077] All water pumps and fans will calculate their working time in minutes when in operation (including manual and automatic). Before each start, the pump with the shortest cumulative working time in the pump group will be selected for priority start. Each time it stops, the pump with the longest single running time will be selected for limited stop to ensure balanced service life.

[0078] Check the actual operation data and the difference in the cumulative working time of the pumps in the same pump group working normally shall not exceed 10%.

[0079] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

[0080] Embodiment 3, the third embodiment of the present invention, is different from the first two embodiments in that:

[0081] If the functions are implemented in the form of software functional units and sold or used as independent products, they 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 the part of the technical solution, can be embodied in the form of a software product. The computer software product is stored in a storage medium, including several instructions for a computer device (which can be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the methods described in each embodiment of the present invention. The aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), disk or optical disk, etc., which can store program codes.

[0082] The logic and / or steps represented in the flowchart or otherwise described herein, for example, can be considered as an ordered list of executable instructions for implementing logical functions, and can be embodied in any computer-readable medium for use by an instruction execution system, device or apparatus (such as a computer-based system, a system including a processor, or other system that can fetch instructions from an instruction execution system, device or apparatus and execute instructions), or in conjunction with such instruction execution systems, devices or apparatuses. For the purposes of this specification, "computer-readable medium" can be any device that can contain, store, communicate, propagate or transmit a program for use by an instruction execution system, device or apparatus, or in conjunction with such instruction execution systems, devices or apparatuses.

[0083] More specific examples of computer-readable media (a non-exhaustive list) include the following: an electrical connection with one or more wires (electronic device), a portable computer disk case (magnetic device), a random access memory (RAM), a read-only memory (ROM), an erasable and programmable read-only memory (EPROM or flash memory), an optical fiber device, and a portable compact disk read-only memory (CDROM). In addition, the computer-readable medium may even be a paper or other suitable medium on which the program is printed, since the program may be obtained electronically, for example, by optically scanning the paper or other medium, followed by editing, deciphering or, if necessary, processing in another suitable manner, and then stored in a computer memory.

[0084] It should be understood that the various parts of the present invention can be implemented by hardware, software, firmware or a combination thereof. In the above-mentioned embodiments, a plurality of steps or methods can be implemented by software or firmware stored in a memory and executed by a suitable instruction execution system. For example, if implemented by hardware, as in another embodiment, it can be implemented by any one of the following technologies known in the art or their combination: a discrete logic circuit having a logic gate circuit for implementing a logic function for a data signal, a dedicated integrated circuit having a suitable combination of logic gate circuits, a programmable gate array (PGA), a field programmable gate array (FPGA), etc.

[0085] Example 4, reference Figure 2 , which is an embodiment of the present invention, provides an air-conditioning room centralized control system, characterized in that it includes a centralized monitoring management module 1, a data acquisition and monitoring module 2, a field control module 3, an energy scheduling monitoring module 4, and an equipment maintenance management module 5;

[0086] Centralized monitoring and management module 1, as the workstation of the host computer, provides a unified monitoring platform to realize the centralized monitoring and management of various electromechanical equipment in the energy station, and configures the centralized control cabinet to realize the centralized control, energy-saving operation and remote monitoring functions of the equipment;

[0087] Data acquisition and monitoring module 2, through bus communication, accesses the data of the air-conditioning unit to realize the collection and monitoring of equipment operating parameters, accesses pipeline sensors, comprehensively obtains system operating data, analyzes the converted load degree, adjusts the frequency conversion and switching of the power device, so as to realize automatic operation and energy-saving operation;

[0088] Field control module 3 uses metering instruments, sensors and electronic control actuators to collect field data and perform execution control, uses PLC programmable logic controllers and serial port communication interfaces to monitor various process parameters of the pipeline system, performs system control of the equipment room and the transmission and distribution system, and accurately tracks user loads;

[0089] Energy dispatch monitoring module 4, which conducts centralized and unified visual monitoring of all major energy sources and information flows within the station, adjusts energy supply through energy dispatch monitoring, and intuitively views all energy data and real-time status of system operation;

[0090] The equipment maintenance management module 5 accumulates and counts the running time of each device, switches the main device according to the equal running time strategy of the equipment, ensures that each device in the system is effectively utilized, and automatically manages the equipment maintenance process.

[0091] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. A centralized control method for an air conditioning room, characterized in that: include, Centralized management and monitoring layer, using workstations as host computers to uniformly monitor all electromechanical equipment in the energy station; At the equipment level, data collection and monitoring of air-conditioning units are achieved through bus communication; At the field level, metering instruments, sensors and electronically controlled actuators are used for data collection and execution control; Realize economical supply of energy through data acquisition system.

2. The centralized control method for an air conditioning room according to claim 1, characterized in that: The centralized management and monitoring layer includes configuring a centralized control cabinet to realize centralized control, energy-saving operation and remote monitoring functions of the main energy equipment in the computer room.

3. The centralized control method for an air conditioning room according to claim 2, characterized in that: The centralized management and monitoring layer also includes a host device parameter monitoring function, which accesses the host data interface through the modbus bus technology to read and display important host data.

4. The centralized control method for an air conditioning room according to claim 3, characterized in that: The equipment layer includes access to pipeline sensors to fully acquire system operating data and analyze the converted load level; The frequency conversion and switching of the power unit are adjusted according to the operating condition data to perform automatic operation and energy-saving operation. Various electromechanical equipment and intelligent instruments are connected to the system through the bus to realize the collection and monitoring of operating parameters.

5. The centralized control method for an air conditioning room according to claim 4, characterized in that: The field layer includes that all major energy sources and information flows within the station enter the system for centralized and unified screen monitoring, and through energy scheduling monitoring, energy supply is adjusted, and all energy data and real-time status of system operation can be intuitively viewed.

6. The centralized control method for an air conditioning room according to claim 5, characterized in that: The data collection and execution control includes using PLC programmable logic control and serial port communication interface to collect data, monitor various process parameters of the pipeline system, perform system control on the equipment in the machine room and the transmission and distribution system according to the load, accurately track the user load, and perform centralized data collection and command control on the operating conditions of the electromechanical equipment group of the energy station through field bus communication; By setting up pressure transmitters and temperature and humidity transmitters, the pressure difference PID adjustment and antifreeze protection of the air conditioning water pipeline are realized, and the temperature threshold dynamic adjustment model is introduced: T set =T base +K f ·(T amb -T min ) Among them, T set is the new set temperature, T base is the base set temperature, K f is the temperature adjustment factor, T amb is the ambient temperature, T min It is the minimum temperature threshold for antifreeze protection; the temperature and humidity transmitter monitors the water pipe temperature, and the PLC dynamically adjusts the antifreeze protection temperature threshold according to the above formula. When the temperature is lower than the threshold, the antifreeze protection measures are started; The host parameters are read through the MODBUS interface, and the unit is started and stopped through communication or dry contacts. The system selects manual start and stop of the chilled water pump or automatic operation of the water pump. The water pump operating frequency is manually set in manual mode, and the water pump operating frequency is automatically adjusted according to the temperature difference or load value of the cold water main in automatic mode.

7. The centralized control method for an air conditioning room according to claim 6, characterized in that: The economical supply of energy includes accumulating and counting the running time of each device, switching the main device according to the equal running time strategy of the devices, so that each device in the system is effectively utilized; Allows the system to automatically adjust non-critical loads during peak hours, reducing overall energy demand, quickly locate system faults through data analysis, reduce maintenance response time, and perform troubleshooting and system upgrades through remote access; Set equipment maintenance time and compare it with operating time to remind you of maintenance time. After maintenance is confirmed, re-accumulate operating time to automatically manage equipment.

8. A system using the centralized control method for an air conditioning room as claimed in any one of claims 1 to 7, characterized in that: It includes centralized monitoring and management module, data acquisition and monitoring module, field control module, energy dispatch monitoring module, and equipment maintenance management module; The centralized monitoring and management module, as a workstation of the host computer, provides a unified monitoring platform to realize centralized monitoring and management of various electromechanical equipment in the energy station, and configures a centralized control cabinet to realize centralized control, energy-saving operation and remote monitoring functions of the equipment; The data acquisition and monitoring module accesses the data of the air-conditioning unit through bus communication to realize the collection and monitoring of equipment operating parameters, accesses the pipeline sensor, comprehensively obtains the system operating data, analyzes the converted load degree, and adjusts the frequency conversion and switching of the power device to realize automatic operation and energy-saving operation; The field control module uses metering instruments, sensors and electronic control actuators to collect field data and perform execution control, uses PLC programmable logic controllers and serial port communication interfaces to monitor various process parameters of the pipeline system, performs system control on the equipment in the machine room and the transmission and distribution system, and accurately tracks user loads; The energy dispatch monitoring module provides centralized and unified visual monitoring of all major energy sources and information flows within the station. Through energy dispatch monitoring, it adjusts energy supply and intuitively views all energy data and real-time status of system operation. The equipment maintenance management module accumulates and counts the running time of each device, switches the main device according to the equal running time strategy of the devices, ensures that each device in the system is effectively utilized, and automatically manages the equipment maintenance process.

9. A computer device comprising a memory and a processor, wherein the memory stores a computer program, wherein: When the processor executes the computer program, the steps of the method according to any one of claims 1 to 7 are implemented.

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

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