CN106225184B - Central air conditioning system and control method thereof - Google Patents
Central air conditioning system and control method thereof Download PDFInfo
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- CN106225184B CN106225184B CN201610831851.XA CN201610831851A CN106225184B CN 106225184 B CN106225184 B CN 106225184B CN 201610831851 A CN201610831851 A CN 201610831851A CN 106225184 B CN106225184 B CN 106225184B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/89—Arrangement or mounting of control or safety devices
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/50—Control or safety arrangements characterised by user interfaces or communication
- F24F11/56—Remote control
- F24F11/58—Remote control using Internet communication
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
- F24F11/63—Electronic processing
Abstract
The invention relates to a central air-conditioning system and a control method thereof. In one aspect, a central air conditioning system (CA) is provided that includes a plurality of system devices (20) and a control system (10) adapted to control operation of the central air conditioning system. At least one of the plurality of system devices is integrated with a device controller (12) to constitute an intelligent system device, and the device controller constitutes at least a part of the control system. According to the present invention, the development method of the order type of the control system of the central air-conditioning system can be improved to a standardized and generalized development method.
Description
Technical Field
The invention relates to the technical field of air conditioning, in particular to a central air conditioning system and a control method thereof.
Background
The cold station of the central air-conditioning system provides air-conditioning chilled water for public buildings, and generally consists of a cooler, a freezing pump, a cooling tower, a valve, an automatic control system and the like. The automatic control system of the cold station of the central air-conditioning system can realize automatic management and control, greatly improve the automation level of the cold station, reduce the input of management manpower and material resources and improve the energy efficiency level of the central air-conditioning system.
The cold station automatic control system of the central air conditioning system according to the related art is provided by an individual group control vendor. Specifically, in actual engineering, cold station equipment (system equipment such as chillers, freeze pumps, cooling towers, and valves) is provided by equipment suppliers, and automatic control systems are provided by group control vendors. Since the cold station automatic control system of the central air conditioning system according to the related art is a centralized control system independent of field devices, the following problems mainly exist.
Because the water system in the central air-conditioning system has various forms, the secondary development workload of the automatic control system is large. For a cold station automatic control system of a central air conditioning system according to the related art, a DDC (direct digital control) controller collects measurement values of sensors and status feedback information of actuators and transmits the same to an upper computer, and the upper computer analyzes and processes the information based on a given algorithm and issues control instructions to the actuators through DDC controller output. In the development process, the control program of each project needs to be developed in an order form because the quantity specifications and the water system forms of each project are different. The development mode is long in period and large in manpower investment, and is not suitable for the requirement of large-scale development.
Detailed equipment models and performance parameters of system equipment in a central air conditioning system are grasped by equipment manufacturers and are usually core parameters of the equipment and cannot be shared. Therefore, as detailed equipment performance parameters cannot be obtained, various optimization control algorithms of automatic control manufacturers are difficult to obtain a good energy-saving effect.
And the workload of field installation and debugging is large. DDC controllers require connection to field devices (such as chillers, water pumps, cooling tower fans, etc.) through a number of IO interfaces (AI, AO, DI, and DO). Since the automatic control system according to the related art is completely independent from the system device, in order to match the connection topology of the automatic control system with the physical connection topology of the actual central air conditioning system, networking configuration work needs to be performed on the control system on site and debugging needs to be performed. The networking configuration refers to reflecting physical information points of actual equipment such as sensors and actuators in a control system, and the physical information points correspond to variables in the control system, and the networking configuration comprises physical connection and software setting of the information points. Thus, problems are brought about, for example: the number of control information points of cold station equipment is large, so that the workload of manual networking configuration is huge, and configuration needs to be completed on site by professional engineers, so that the labor cost is high, and the time period is long; if the field device is not identical to the intended plan, it is likely that the automatic control system will not be able to match the field device.
It is difficult to adapt to the change of the equipment state in the operation of the central air-conditioning system. For example, in the actual operation process of the central air conditioning system, if some system devices in the central air conditioning system are changed, other types of system devices are replaced, the number of system devices is increased or decreased, and the like, the hardware interfaces, the system configuration, the control algorithm, and the like of the automatic control system need to be modified accordingly, which often requires a complicated operation on site by a professional engineer.
In summary, since the automatic control system of the cold station of the central air conditioning system according to the related art is centralized and independent of the field device, a very professional person is required to perform order development and perform installation and debugging on the field, which greatly limits the large-scale development, popularization and application of the automatic control system of the cold station of the central air conditioning system.
It should be noted here that the technical contents provided in this section are intended to assist those skilled in the art in understanding the present invention, and do not necessarily constitute prior art.
Disclosure of Invention
In order to solve or partially solve at least one of the above problems in the related art, the present invention provides a central air conditioning system, a control system thereof, and a control method thereof, which improve an order-based development manner of a control system of the central air conditioning system into a standardized, generalized development manner.
According to one aspect of the present invention, a central air conditioning system is provided. The central air conditioning system includes a plurality of system devices and a control system adapted to control operation of the central air conditioning system. At least one of the plurality of system devices is integrated with a device controller so as to constitute an intelligent system device, and the device controller constitutes at least a part of the control system.
Preferably, each of the plurality of system devices is integrated with a respective device controller.
Preferably, the respective device controllers are serially connected via an external communication line to allow communication and negotiation between the respective device controllers.
Preferably, each of the plurality of system devices includes a single device, or at least one of the plurality of system devices is implemented as a system device group including a plurality of devices of the same type.
Preferably, in a case where at least one of the plurality of system devices is implemented as a system device group including a plurality of devices of the same type, each of the plurality of devices of the same type in the system device group is integrated with a respective device controller.
Preferably, the respective device controllers are arranged in parallel in the same system device group, and each of the respective device controllers is connected to the device controller of the adjacent system device via a corresponding external communication line to implement mutual communication and negotiation.
Preferably, in the same system device group, the respective device controllers are connected to each other via an internal communication line to achieve mutual communication and negotiation.
Preferably, the respective device controllers have the same control program to achieve standardization of the control program and/or have the same standard information set in the same system device group.
Preferably, the device controller has a standardized set of standard information associated with the respective system device.
Preferably, the standard information set includes a device type, a device number, a device performance parameter, a device model, a device operation state, a device setting value, and/or a device alarm information.
Preferably, the network configuration of the device controller and the corresponding system device is performed in a production plant of the corresponding system device.
Preferably, the networking configuration includes IO connections of the device controller with sensors and/or actuators of the corresponding system device.
Preferably, the central air conditioning system includes a cold station and the control system is adapted to control operation of the cold station.
Preferably, the cold station comprises a chiller, a freeze pump, a cooling pump and/or a cooling tower.
According to another aspect of the present invention, there is provided a control system for a central air conditioning system as described above.
According to another aspect of the present invention, there is provided a control method of controlling the central air conditioning system as described above. The control method comprises the following steps: and under the condition that each system device in the plurality of system devices is integrated with a respective device controller, the device controllers which are connected with each other are communicated and negotiated so as to determine the optimized operation parameters of the system devices based on the respective standard information sets of the device controllers.
Preferably, the control method further includes the steps of: in a case where at least one of the plurality of system devices is implemented as a system device group including a plurality of devices of the same type and each of the plurality of devices of the same type is integrated with a respective device controller, the device controllers connected to each other are caused to communicate and negotiate in the same system device group to determine the number of optimized booters of the plurality of devices of the same type.
Preferably, determining the optimized number of the opened devices of the same type comprises: transmitting a total amount of workload associated with the system device group to any one of a plurality of device controllers of the system device group, the device controller determining whether a corresponding system device is turned on by the number-optimized control program stored by the device controller and based on a standard information set of the device controller, and the device controller transferring a remaining amount of workload to another device controller of the plurality of device controllers of the system device group when it is determined that the corresponding system device needs to be turned on and the total amount of workload is not yet satisfied.
According to the invention, the control system which is centralized and independent from the system equipment is upgraded and improved into the intelligent system equipment with the high integration of the control system and the system equipment, so that the order type development mode of the control system of the central air-conditioning system is improved into a standardized and generalized development mode. On this basis, the following advantageous technical effects can be achieved.
The method can adapt to different equipment quantity specifications and water system forms in a water system of a central air-conditioning system, and greatly simplifies the development work of a control program. For example, the labor cost for developing the control system can be reduced by 50% or more, and the development cycle can be reduced by 50% or more.
The equipment manufacturer can write the equipment performance parameters into the equipment controller, so that the optimized control algorithm can obtain good energy-saving effect under the condition of keeping secrecy of other participants. For example, the cold station operation of the central air conditioning system can save 20% to 50% of energy.
IO wiring between the device controller and the system devices and related configuration work can be done within the device factory, which enables a high degree of integration with the system devices without the need for wiring in the field, etc. For example, the intelligent system can be operated only by connecting communication lines among intelligent system devices on site, and the on-site installation and debugging period is shortened by over 50%.
In the operation process, when the number of the devices, the performance parameters and the like are changed, only the corresponding adjustment is needed to be carried out on the communication line, the software and hardware configuration is not needed to be modified, and the overall operation of the central air-conditioning system is not influenced.
Drawings
The above and other objects, features and advantages of the present invention will become more apparent from the following detailed description of embodiments of the present invention with reference to the accompanying drawings, in which:
fig. 1 is a block diagram illustrating a central air conditioning system according to an exemplary embodiment of the present invention; and
fig. 2 is a block diagram illustrating a control system of a central air conditioning system according to an exemplary embodiment of the present invention.
Description of reference numerals:
10-a control system; 12-a device controller; 12A-a device controller; 12B-device controller; 12C-device controller; 12C 1-device controller; 12C 2-device controller; 12C 3-device controller; 12C 4-device controller; 12D-device controller; 14-external communication lines; 14.1-external communication line; 14.2-external communication line; 14.3-external communication line; 14.4-external communication line; 16-internal communication lines; 20-system equipment; 20A-a refrigerator; 20B-a freeze pump; 20C-cooling pump; 20D-cooling tower; CA-central air conditioning system; CS-Cold station.
Detailed Description
The invention is described in detail below with the aid of exemplary embodiments with reference to the attached drawings. The following detailed description of the invention is merely for purposes of illustration and is in no way intended to limit the invention, its application, or uses.
Referring to fig. 1 (fig. 1 is a block diagram illustrating a central air conditioning system according to an exemplary embodiment of the present invention), a central air conditioning system CA according to an exemplary embodiment of the present invention may include a plurality of system devices 20 and a control system 10 adapted to control the operation of the central air conditioning system CA.
In some examples, the central air conditioning system CA may comprise a cold station CS for providing air-conditioned chilled water to public buildings, for example, and the control system 10 may be adapted to control the operation of the cold station CS. In this case, as shown in fig. 1, the cold station CS may include a refrigerator 20A, a freezing pump 20B, a cooling pump 20C, a cooling tower 20D, a valve (not shown), and the like.
As shown in fig. 1, each of a plurality of system devices 20 (e.g., a chiller 20A, a freezing pump 20B, a cooling pump 20C, and a cooling tower 20D) is integrated with a respective device controller 12A-12D (collectively, device controllers 12), thereby constituting a so-called intelligent system device in which a control system is highly integrated with the device. The equipment controller 12 forms at least a part of the control system 10.
In other words, each system device has a corresponding device controller built therein, so that each system device is upgraded to an intelligent system device, thereby conveniently controlling each system device and its attached sensors and actuators.
The equipment controller 12 may have a standardized set of standard information associated with the respective system equipment 20. The standard information set may include: the device type, the device number, the device performance parameters, the device model, the device running state, the device set value and/or the device alarm information.
In this respect, standard information sets can be formulated for different system devices, and the set of database maximally contains various information of the system devices, so that global setting for each information point is not required, and the networking configuration work is greatly simplified.
For example, the standard information set for a refrigerator may include: the device type, the device number, the performance parameters (such as rated refrigerating capacity, rated power, rated flow of chilled water, rated flow of cooling water and the like), the device model (namely COP curves of the refrigerator under different parameters of chilled water outlet temperature, cooling water inlet temperature, load factor, chilled water flow, cooling water flow and the like), the operation state (such as manual automatic state, start-stop state, accumulated operation time, start times, COP of the refrigerator, power of the refrigerator, evaporation temperature, condensation temperature, valve state at the water side of the evaporator, valve state at the water side of the condenser and the like), the set values (such as manual automatic state setting, start-stop state setting, chilled water outlet temperature setting and the like), and alarm information (such as refrigerator alarm, communication state and the like).
For example, a standard set of information for water pumps (including freeze and cooling pumps) may include: the device type, the device number, the performance parameters (such as rated flow, rated power, rated lift, rated efficiency and the like), the device model (namely, the lift and efficiency curve of the water pump under different parameters of frequency, flow and the like), the running state (such as manual automatic state, starting and stopping state, accumulated running time, starting times, water pump efficiency, water pump power, water pump flow, water pump frequency, water pump lift and the like), the set values (such as manual automatic state setting, starting and stopping state setting, frequency set values and the like), and the alarm information (such as water pump alarm, communication state and the like).
In a preferred example, all information/variables of the intelligent system device itself are incorporated into the standard information set based on an ordered format without duplication and omission. Therefore, when the equipment is connected with each other, only the equipment type, the equipment number and the like need to be set, and the overall definition and configuration work of each equipment information point can be avoided when different projects are carried out. In addition, as will be further described below, retrieval and calling of information among the intelligent system devices can be realized based on the standard information set.
In a preferred example, the networking configuration of the device controller 12 with the respective system device 20 is done within the production plant of the respective system device 20 (before the system device is shipped from the factory). Networking configuration may include IO wiring, etc. of the device controller 12 with sensors and/or actuators of the corresponding system devices 20. In other words, the IO wiring and related configuration work between the device controller 20 and the corresponding system device 20 can be done in the factory, which enables a high degree of integration of the device controller with the corresponding system device without the need for networking configuration and commissioning in the field. Therefore, the central air conditioning system CA can be operated only by connecting the communication lines between the intelligent system devices (specifically, the internal device controllers of the intelligent system devices) on site, so that the workload of site configuration and debugging can be greatly reduced.
In some examples, each device controller may only control the system device corresponding to the device controller and its attached sensors and actuators. For example, when the system equipment is a chiller, the equipment controller may control the individual chiller connected thereto as well as the attached chilled inlet and outlet water temperature sensors, chilled side electrically operated valves, etc. For another example, when the system equipment is a water pump, the equipment controller may control the individual water pumps connected thereto and their accompanying pressure sensors, temperature sensors, etc. For another example, when the system equipment is a cooling tower, the equipment controller can control a single cooling tower fan connected with the equipment and an attached electric valve for water inlet and outlet of the cooling tower, a temperature sensor for water inlet and outlet of the cooling tower, an outdoor temperature and humidity sensor and the like.
As shown in FIG. 1, the respective device controllers 12A-12D may be serially connected via an external communication line 14 to allow communication and negotiation (to allow information exchange and computation) between the respective device controllers 12A-12D.
In one aspect, the equipment controllers 12A-12D of the different types of system equipment are connected by communication lines so that the system equipment, such as a chiller pump, a cooling tower, etc., can be controlled in conjunction with the chiller. For example, in the coordinated control, when the refrigerator is turned on, the corresponding freezing pump, cooling tower, and the like are required to be sequentially turned on with a certain time delay, and when the refrigerator is turned off, the corresponding freezing pump, cooling tower, and the like are required to be sequentially turned off with a certain time delay.
On the other hand, the equipment controllers 12A to 12D of different types of system equipment are connected via communication lines, so that a certain equipment controller can communicate and negotiate with equipment controllers of other different types of system equipment based on its own performance curve (constituting a part of the standard information set) to determine optimum operating parameters, thereby realizing energy-saving optimum control of the different types of system equipment and thus the entire central air-conditioning system. For example, the chiller and chilled water pump device controllers may determine the optimal chilled water flow rate by negotiating with each other based on respective performance curves, and the chiller and chilled water pump device controllers may determine the chilled water flow rate by negotiating with each other based on respective performance curves.
In some examples, each system device 20 of the plurality of system devices 20 may include only a single device.
In other examples, at least one system device 20C (e.g., all system devices) of the plurality of system devices 20 may be implemented as a system device group including a plurality of devices of the same type. In this case, each of the plurality of the same-type devices in each of the system-device groups may be integrated with a respective device controller 12C1-12C 4. Referring to fig. 2 (fig. 2 is a block diagram illustrating a control system of a central air conditioning system according to an exemplary embodiment of the present invention), it is exemplarily shown that the cooling pump 20C of the system equipment is implemented as a system equipment group including four same-type equipment (cooling pumps), and each of the four cooling pumps may be integrated with a respective equipment controller 12C1-12C 4.
In the case where at least one system device 20C (e.g., all system devices) among the plurality of system devices 20 is implemented as a system device group including a plurality of devices of the same type, only one or more devices among the plurality of devices of the same type may be selected instead of all devices, and the selected device may be connected to devices in other system device groups. In this way, various water system forms can be derived by means of the change of the connection mode so as to meet the requirements of different water system forms.
As shown in FIG. 2, the respective equipment controllers 12C1-12C4 may be arranged in parallel, and the respective equipment controllers 12C1-12C4 may each be connected to the equipment controllers 12A, 12D of adjacent system equipment (chiller 20A and cooling tower 20D) via respective external communication lines 14.1-14.4 to enable communication and negotiation with each other.
As shown in FIG. 2, the respective device controllers 12C1-12C4 may be interconnected via an internal communication line 16 to enable communication and negotiation with each other.
Therefore, in the same system equipment group, because a plurality of same-type equipment and corresponding equipment controllers thereof are arranged in parallel and the corresponding equipment controllers are connected through the internal communication line, each equipment controller can carry out mutual communication and negotiation with adjacent equipment controllers on the basis of the performance curve of the equipment controller, so as to determine the number of the optimized starting equipment of the same-type equipment, and further realize the optimized energy-saving control of a group of the same-type equipment in the system equipment group.
For example, the optimal control program for the number of chillers may be installed (stored) in a plurality of parallel chiller device controllers, and used to optimally allocate the cooling capacity demand in a plurality of chillers, and determine the number of chillers after energy saving optimization. When any one cold machine controller receives a total refrigerating capacity demand sent by a main pipe controller, for example, the number optimization control program running on the cold machine controller determines whether a corresponding cold machine is started or not according to a performance curve of the cold machine controller and a certain energy-saving optimization algorithm, and when the total refrigerating capacity demand is still not met after the corresponding cold machine is started, the cold machine controller can transmit the residual refrigerating capacity demand to the adjacent cold machine controller. And each cold machine equipment controller receiving the refrigerating capacity requirement determines whether a corresponding cold machine is started according to the same optimization control algorithm, and transmits the residual refrigerating capacity requirement to the adjacent cold machine equipment controllers until the residual refrigerating capacity requirement reaches a convergence condition, wherein the number of the started cold machines is the result after energy-saving optimization.
The optimal distribution and transmission process of the optimal control of the number of the water pumps and the optimal control of the number of the cooling towers is similar to the optimal distribution and transmission process of the optimal control of the number of the cold machines in working principle.
In some examples, the respective device controllers 12C1-12C4 may have the same control program, which facilitates standardization of the control programs. Additionally or alternatively, the respective device controllers 12C1-12C4 may have the same standard information set.
In this respect, even if the same type of equipment of different brands, specifications is used, the standard information set and control program of the equipment controller of each of the same type of equipment may be identical. In this way, during operation, when the number of devices of the same type, performance parameters, etc. arranged in parallel and interconnected are changed, only the corresponding adjustments to the intercom line 16 are required, no modifications to the software and hardware configuration are required, and the overall operation of the central air conditioning system is not affected. For example, as shown in FIG. 2, when the intelligent cooling pump associated with the equipment controller 12C3 fails, it is only necessary to disconnect the communication lines across the failed intelligent cooling pump and connect the communication lines between the intelligent cooling pump associated with the equipment controller 12C2 and the intelligent cooling pump associated with the equipment controller 12C4 without affecting the normal operation of the other intelligent cooling pumps in the system equipment group. After the intelligent cooling pump with the fault is repaired, the communication lines at the two ends of the intelligent cooling pump are restored and connected, so that the intelligent cooling pump can be added into the operation of automatic control again.
In addition, as shown in fig. 1, if the smart cooling pump 12C includes a set of smart cooling pumps 1# to n # connected in parallel and the smart cooler is connected to the smart cooling pump 1#, when the smart cooling pump 1# fails, the smart cooler can be connected to any one of the smart cooling pumps 2# to n #, thereby not affecting the normal operation of the central air-conditioning system.
In summary, according to the central air conditioning system according to the exemplary embodiment of the present invention, a centralized control system independent from system devices is upgraded to an intelligent system device in which the control system is highly integrated with the system devices, thereby improving an order type development manner of the control system of the central air conditioning system to a standardized and generalized development manner. On this basis, the following advantageous technical effects can be achieved.
The method can adapt to different equipment quantity specifications and water system forms in a water system of a central air-conditioning system, and greatly simplifies the development work of a control program. For example, the labor cost for developing the control system can be reduced by 50% or more, and the development cycle can be reduced by 50% or more.
The equipment manufacturer can write the equipment performance parameters into the equipment controller, so that the optimized control algorithm can obtain good energy-saving effect under the condition of keeping secrecy of other participants. For example, the cold station operation of the central air conditioning system can save 20% to 50% of energy.
IO wiring between the device controller and the system devices and related configuration work can be done within the device factory, which enables a high degree of integration with the system devices without the need for wiring in the field, etc. For example, the intelligent system can be operated only by connecting communication lines among intelligent system devices on site, and the on-site installation and debugging period is shortened by over 50%.
In the operation process, when the number of the devices, the performance parameters and the like are changed, only the corresponding adjustment is needed to be carried out on the communication line, the software and hardware configuration is not needed to be modified, and the overall operation of the central air-conditioning system is not influenced.
According to the present invention, there is also provided a control system 10 for a central air conditioning system CA as described above.
According to the present invention, there is also provided a control method of controlling the central air conditioning system CA as described above. The control method may include: in the case where each of the plurality of system devices 20 is integrated with a respective device controller 12A-12D, the interconnected device controllers 12 are caused to communicate and negotiate to determine optimal operating parameters for the system devices based on the respective sets of standard information for the device controllers 12.
The control method may further include: in the case where at least one system device 20C of the plurality of system devices 20 is implemented as a system device group including a plurality of devices of the same type and each of the plurality of devices of the same type is integrated with a respective device controller 12C1-12C4, the interconnected device controllers are caused to communicate and negotiate to determine an optimum number of openers for the plurality of devices of the same type in the same system device group.
Determining an optimized number of open devices of a plurality of devices of the same type may include: the total amount of workload associated with the system equipment group is transferred to any one of a plurality of equipment controllers 12C1-12C4 of the system equipment group, the equipment controller determines whether a corresponding system equipment is on by the number-optimized control program stored by the equipment controller and based on a standard information set of the equipment controller, and the equipment controller transfers the remaining amount of workload to another one of the plurality of equipment controllers of the system equipment group when it is determined that the corresponding system equipment needs to be on and the total amount of workload has not yet been met.
The air-conditioning central system and the control method thereof according to the present invention are susceptible to various modifications.
For example, in the above-described exemplary embodiment, each of the plurality of system devices 20 is integrated with a respective device controller 12A-12D, however, it is contemplated that only one or more, but not all, of the plurality of system devices 20 are integrated with a device controller 12. This modification still has an advantage in terms of simplifying the development of the control program as compared with the central air conditioning system according to the related art.
For another example, although the central air conditioning system CA and its control system are described above with respect to the cold station CS, it should be understood that the present invention may also be applied to other central air conditioning systems (e.g., a central air conditioning system for providing air-conditioned hot water for public buildings) other than the central air conditioning system having the cold station CS.
For another example, although described above as having one device controller integrated with each system device, it is contemplated that the following may also be implemented: one device controller corresponds to a plurality of system devices (in particular, a plurality of devices of the same type).
It should be noted that in this specification, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
Finally, it should be noted that: it is obvious that the above embodiments/examples are only examples for clearly illustrating the present invention, and are not to be construed as limiting the embodiments/examples. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. All embodiments/examples need not be, and cannot be, exhaustive herein. And obvious variations or modifications of the invention may be made without departing from the scope of the invention.
Claims (12)
1. A central air-conditioning system (CA) comprising a plurality of system devices and a control system (10) adapted to control the operation of the central air-conditioning system, characterized in that each of the plurality of system devices is integrated with a respective device controller, constituting an intelligent system device, and the device controllers constitute at least a part of the control system; the equipment controllers having standardized sets of standard information associated with respective system equipment, the respective equipment controllers being serially connected via an external communication line to allow communication and negotiation between the respective equipment controllers to effect coordinated control and optimized operating parameters of the plurality of system equipment;
the standard information set comprises equipment type, equipment number, equipment performance parameters, an equipment model, equipment running state, equipment set values and/or equipment alarm information; all information/variables of the intelligent system equipment are incorporated into the standard information set in an unrepeated and unreleased manner based on a certain sequence format, when the system equipment is connected with respective equipment controllers, only the equipment type and the equipment number need to be set, and based on the standard information set, retrieval and calling of the information can be realized among the intelligent system equipment;
the system equipment is internally provided with a corresponding equipment controller, the equipment controller and the networking configuration of the corresponding system equipment are completed in a production factory of the corresponding system equipment, the networking configuration comprises wiring between the equipment controller and the corresponding system equipment, and IO wiring of a sensor and/or an actuator of the equipment controller and the corresponding system equipment.
2. A central air-conditioning system (CA) according to claim 1, characterized in that:
each of the plurality of system devices includes a single device, or
At least one of the plurality of system devices is implemented as a system device group including a plurality of devices of the same type.
3. A central air-conditioning system (CA) according to claim 2, characterized in that, in case at least one of said plurality of system equipments is implemented as a system equipment group comprising a plurality of equipments of the same type, each of the plurality of equipments of the same type in said system equipment group is integrated with a respective equipment controller.
4. A central air-conditioning system (CA) according to claim 3, characterized in that in the same system equipment group, said respective equipment controllers are arranged in parallel and each connected to the equipment controller of the adjacent system equipment via a corresponding external communication line to enable mutual communication and negotiation.
5. A central air conditioning system (CA) according to claim 3, characterized in that in the same system equipment group, the respective equipment controllers are connected to each other via an internal communication line (16) to enable mutual communication and negotiation.
6. A central air-conditioning system (CA) according to claim 3, characterized in that in the same system equipment group the respective equipment controllers have the same control program to achieve standardization of the control program and/or the respective equipment controllers have the same standard information set.
7. A central air-conditioning system (CA) according to any of claims 1 to 6, characterized in that it comprises a Cold Station (CS) and in that said control system (10) is adapted to control the operation of said cold station.
8. Central air conditioning system (CA) according to claim 7, characterized in that said Cold Station (CS) comprises a chiller (20A), a freeze pump (20B), a cooling pump (20C) and/or a cooling tower (20D).
9. A control system (10) of a central air conditioning system (CA) according to any of claims 1 to 8.
10. A control method of controlling a central air conditioning system (CA) according to any one of claims 1 to 8, characterized by comprising the steps of:
and under the condition that each system device in the plurality of system devices is integrated with a respective device controller, the device controllers which are connected with each other are communicated and negotiated so as to determine the optimized operation parameters of the system devices based on the respective standard information sets of the device controllers.
11. The control method according to claim 10, characterized by further comprising the step of:
in a case where at least one of the plurality of system devices is implemented as a system device group including a plurality of devices of the same type and each of the plurality of devices of the same type is integrated with a respective device controller, the device controllers connected to each other are caused to communicate and negotiate in the same system device group to determine the number of optimized booters of the plurality of devices of the same type.
12. The control method of claim 11, wherein determining the optimized number of open devices of the plurality of devices of the same type comprises: transmitting a total amount of workload associated with the system device group to any one of a plurality of device controllers of the system device group, the device controller determining whether a corresponding system device is turned on by the number-optimized control program stored by the device controller and based on a standard information set of the device controller, and the device controller transferring a remaining amount of workload to another device controller of the plurality of device controllers of the system device group when it is determined that the corresponding system device needs to be turned on and the total amount of workload is not yet satisfied.
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| CN112034810A (en) * | 2019-06-03 | 2020-12-04 | 上海丰志汽车科技有限公司 | Device and method for automatically identifying position of standard ECU (electronic control Unit) for mounting whole vehicle |
| CN111442480A (en) * | 2020-04-08 | 2020-07-24 | 广东美的暖通设备有限公司 | Operation control method and system for air conditioning equipment, air conditioning equipment and storage medium |
| CN113739391B (en) * | 2021-08-23 | 2022-07-15 | 珠海格力电器股份有限公司 | Water pump operation control method and system, air-conditioning water pump and air-conditioning unit |
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