CN106642527A - Control system of machine room air conditioner, machine room system and control method thereof - Google Patents
Control system of machine room air conditioner, machine room system and control method thereof Download PDFInfo
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- CN106642527A CN106642527A CN201610946052.7A CN201610946052A CN106642527A CN 106642527 A CN106642527 A CN 106642527A CN 201610946052 A CN201610946052 A CN 201610946052A CN 106642527 A CN106642527 A CN 106642527A
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- 238000000034 method Methods 0.000 title claims abstract description 29
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 213
- 238000001816 cooling Methods 0.000 claims description 42
- 238000004891 communication Methods 0.000 claims description 37
- 239000000498 cooling water Substances 0.000 claims description 29
- 238000012544 monitoring process Methods 0.000 claims description 8
- 230000003044 adaptive effect Effects 0.000 claims description 6
- 238000010276 construction Methods 0.000 claims description 6
- 230000007547 defect Effects 0.000 abstract description 4
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 238000007710 freezing Methods 0.000 description 8
- 230000008014 freezing Effects 0.000 description 8
- 230000008569 process Effects 0.000 description 5
- 238000004378 air conditioning Methods 0.000 description 3
- 230000003247 decreasing effect Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 230000003993 interaction Effects 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 238000005057 refrigeration Methods 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 239000008400 supply water Substances 0.000 description 1
Classifications
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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
- F24F11/62—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
-
- 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
- F24F11/54—Control or safety arrangements characterised by user interfaces or communication using one central controller connected to several sub-controllers
-
- 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
-
- 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
- F24F11/65—Electronic processing for selecting an operating mode
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- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fuzzy Systems (AREA)
- Mathematical Physics (AREA)
- Signal Processing (AREA)
- Air Conditioning Control Device (AREA)
Abstract
The invention discloses a control system of a machine room air conditioner, a machine room system and a control method thereof, wherein the control system comprises: the system comprises a centralized controller (20), a distributed controller (22), a water chilling unit (30) and an external device (40); wherein the centralized controller (20) is used for controlling the operation of the water chilling unit (30); the distributed controller (22) is respectively matched with the water chilling unit (30) and the external equipment (40) and is used for controlling the operation of the external equipment (40) of the water chilling unit (30) based on the operation logic of the water chilling unit (30). The scheme of the invention can overcome the defects of few functions, high failure rate, poor stability and the like in the prior art, and has the beneficial effects of more functions, low failure rate and good stability.
Description
Technical Field
The invention belongs to the technical field of machine room refrigeration, and particularly relates to a control system of a machine room air conditioner, a machine room system and a control method thereof, in particular to a control system based on a control logic of a water chilling unit, a machine room system (namely a modular machine room system) with the control system and a control method of the machine room system (namely a modular machine room group control method).
Background
In the IT industry, a computer room may be a telecommunication, internet, mobile, two-wire, power, government or enterprise, etc., where various servers and mini-machines are stored to provide IT services to users and employees. The group control system (for example, a machine room group control system) on the market generally only controls the start and stop of a unit (for example, an air conditioning unit), does not control external equipment, has few functions, cannot control the fault rate of the system, and cannot ensure the stability of the operation of the system.
In the prior art, the defects of few functions, high failure rate, poor stability and the like exist.
Disclosure of Invention
The invention aims to provide a control system of a machine room air conditioner, a machine room system and a control method thereof, aiming at overcoming the defects that the machine room group control system only controls the start and stop of a machine set and does not control external equipment in the prior art, so that the fault rate is high, and the effect of reducing the fault rate is achieved.
The invention provides a control system of a machine room air conditioner, comprising: the system comprises an integrated controller, a distributed controller, a water chilling unit and external equipment; the centralized controller is used for controlling the operation of the water chilling unit; the distributed controller is respectively matched with the water chilling unit and the external equipment and used for controlling the operation of the external equipment of the water chilling unit based on the operation logic of the water chilling unit.
Optionally, the number of the water chilling units is more than one; the centralized controller is respectively matched with each water chilling unit and is used for controlling the start and stop of the water chilling units and/or increasing and decreasing loads based on the load and the state of the water chilling units so as to realize the dispatching of the water chilling units; the number of the distributed controllers is matched with that of the water chilling units; each distributed controller is matched with one water chilling unit and the external equipment thereof and is used for controlling the starting and stopping of the external equipment based on the operation logic of the water chilling unit.
Optionally, the controlling, by the centralized controller, the load increase and load decrease of the water chilling unit specifically includes: when the load is larger than a preset value, loading the number of the started water chilling units one by one from a preset minimum number; or when the load is less than or equal to the preset value, the number of the opened water chilling units is reduced one by one from the preset maximum number.
Optionally, the external device includes: at least one of a set butterfly valve, a chilled water pump, a cooling tower fan and a sensor which are matched with the water chilling unit for standby; and/or the operation logic of the water chilling unit comprises the following steps: at least one start-stop signal of a freezing water pump, a cooling water pump and a cooling tower fan; wherein, distributed controller control external device's start-stop specifically includes: when the operation logic of the water chilling unit is a closing signal of the chilled water pumps, starting a preset number of external chilled water pumps to be used and unit butterfly valves; or when the operation logic of the water chilling unit is a closing signal of the cooling water pumps, starting a preset number of externally-connected standby cooling water pumps; or when the operation logic of the water chilling unit is a closing signal of the cooling tower fans, starting a preset number of external cooling tower fans to be used.
Optionally, each of the distributed controllers is further adapted to the centralized controller, and configured to feed back a fault signal of the external device to the centralized controller when the external device is in fault; the centralized controller is further used for closing the water chilling unit of the water path where the fault signal is located based on the fault signal.
Optionally, the method further comprises: at least one of a monitoring center and a communication device; the monitoring center is adaptive to the centralized controller and is used for displaying and/or performing auxiliary control on the operation of the water chilling unit and/or the operation of the external equipment; the communication device is matched with at least one of the centralized controller, the water chilling unit and the external equipment and used for providing communication connection.
Optionally, the monitoring center includes: monitoring a computer; and/or, the communication device includes: an Ethernet module and/or a ModBus RTU communication cable; the monitoring center is connected with the centralized controller through the Ethernet provided by the Ethernet module; the centralized controller is connected with the water chilling unit and/or the external equipment through the ModBus RTU communication cable.
In accordance with the above control system, another aspect of the present invention provides a machine room system, including: the control system described above; wherein, when the control system comprises the centralized controller and the distributed controllers, the number of the distributed controllers is adapted to the scale of the machine room.
In another aspect, the present invention provides a method for controlling a machine room system, including: controlling the operation of the water chilling unit for the machine room system; and controlling the operation of the external equipment of the water chilling unit based on the operation logic of the water chilling unit.
Optionally, when the machine room system includes the centralized controller, controlling an operation logic of the water chilling unit includes: controlling the start and stop and/or load increase and load decrease of the water chilling unit by the centralized controller based on the load and the state of the water chilling unit so as to realize the dispatching of the water chilling unit; wherein,
controlling the start and stop and/or the load increase and decrease of the water chilling unit specifically comprises the following steps:
when the load is larger than a preset value, loading the number of the started water chilling units one by one from a preset minimum number; or when the load is less than or equal to the preset value, the number of the opened water chilling units is reduced one by one from the preset maximum number.
Optionally, when the machine room system further includes the distributed controller, controlling start and stop of the external device based on an operation logic of the water chilling unit, including: controlling the starting and stopping of the external equipment through the distributed controller based on the operation logic of the water chilling unit; wherein, when external equipment includes at least one of unit butterfly valve, frozen water pump, cooling tower fan, control external equipment opens and stops, specifically includes: when the operation logic of the water chilling unit is a closing signal of the chilled water pumps, starting a preset number of external chilled water pumps to be used and unit butterfly valves; or when the operation logic of the water chilling unit is a closing signal of the cooling water pumps, starting a preset number of externally-connected standby cooling water pumps; or when the operation logic of the water chilling unit is a closing signal of the cooling tower fans, starting a preset number of external cooling tower fans to be used.
Optionally, when the computer room system includes the centralized controller and the distributed controller, the computer room system further includes: through the distributed controller, when the external equipment fails, a fault signal of the external equipment is fed back to the centralized controller; and closing the water chilling unit of the water path where the fault signal is located by the centralized controller based on the fault signal.
Optionally, the method further comprises: when the machine room system comprises the monitoring center, displaying and/or performing auxiliary control on the operation of the water chilling unit and/or the operation of the external equipment through the monitoring center; and/or, when the computer room system comprises the communication device, providing communication connection through the communication device.
Optionally, when the computer room system includes the centralized controller and the distributed controller, the computer room system further includes: and based on the scale of the machine room, the number of the distributed controllers is set in an adaptive manner so as to realize the modular construction of the machine room system.
According to the scheme, based on the control logic of the water chilling unit, the central air conditioner room group control system is constructed in a modularized mode by combining a centralized network and a distributed network, the system is controlled in a manual mode or an automatic mode, and the running stability, the independence and the expandability of the system are ensured.
Furthermore, according to the scheme of the invention, the control logic of the water chilling unit is fully utilized, the system failure rate is reduced, the stable operation of the system is realized by combining the centralized type and the distributed type, when the centralized controller fails, each set of distributed system can also operate independently, the reliability and the safety of a group control system are greatly ensured, and the modular construction can be carried out according to central air-conditioning machine room systems of different scales.
Furthermore, the integrated controller only schedules the start and stop and load increase and load decrease of the unit, and the distributed controller controls the external equipment according to the unit logic, so that the hardware and software are modularized, and the stability and the independence of the system operation are ensured.
Therefore, the scheme of the invention utilizes the control logic of the unit (such as a water chilling unit) to carry out centralized and distributed combined control, and solves the problem that the fault rate is high because only the start and stop of the unit are controlled and external equipment is not controlled in the prior art, thereby overcoming the defects of few functions, high fault rate and poor stability in the prior art and realizing the beneficial effects of more functions, low fault rate and good stability.
Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.
The technical solution of the present invention is further described in detail by the accompanying drawings and embodiments.
Drawings
Fig. 1 is a schematic structural diagram of a control system of a machine room air conditioner according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of another embodiment of the control system of the air conditioner in the machine room according to the present invention.
Fig. 3 is a schematic network architecture diagram of an embodiment of a computer room system according to the present invention.
The reference numbers in the embodiments of the present invention are as follows, in combination with the accompanying drawings:
10-a monitoring center; 100-monitoring computer; 20-a centralized controller; 22-distributed controller; 30-a water chilling unit; 40-external equipment; 400-unit butterfly valve; 402-chilled water pump; 404-a cooling water pump; 406-cooling tower fan; 408-a sensor; 50-a communication device.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be clearly and completely described below with reference to the specific embodiments of the present invention and the accompanying drawings. It is to be understood that the described embodiments are merely exemplary of the invention, and not restrictive of the full scope of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Generally, in the refrigeration industry, a water chilling unit (such as a centrifuge, a water-cooling screw machine, an air-cooling screw machine and the like) can realize the refrigerating and heating effects of the unit through four main components (namely a compressor, an evaporator, a condenser and an expansion valve).
The on-off process of the water chilling unit is provided with a set of complete control logic. For example: the use side water pump (for example, the use side water pump can be a freezing water pump), the heat source side water pump (for example, the heat source side water pump can also be a cooling water pump), and the cooling tower fan are opened or closed according to a certain time sequence, and corresponding intermediate relays are closed, so that dry contacts are provided for external equipment.
According to an embodiment of the present invention, a control system of a machine room air conditioner is provided, as shown in fig. 1, which is a schematic flow chart of an embodiment of the method of the present invention. The control system of the machine room air conditioner may include: the system comprises a centralized controller 20, a distributed controller 22, a water chilling unit 30 and an external device 40.
In one example, the centralized controller 20 may be configured to control the operation of the chiller 30.
In one example, the distributed controller 22, respectively adapted to the chiller 30 and the external device 40, may be configured to control the operation of the external device 40 of the chiller 30 based on the operation logic of the chiller 30.
For example: the water chilling unit self-control logic is mainly utilized, the centralized controller only carries out scheduling control on the water chilling unit, and the water chilling unit provides start-stop signals of a use side water pump (freezing water pump), a heat source side water pump (cooling water pump) and a cooling tower fan to the distributed controller.
Therefore, the running of the water chilling unit is controlled, the running of the external equipment of the water chilling unit is controlled based on the control logic of the water chilling unit, the fault rate of the system can be controlled, and the running stability of the system is improved.
In an alternative embodiment, referring to the example shown in fig. 3, the number of the water chilling units 30 is more than one.
In an optional example, the centralized controller 20 is respectively configured to be adapted to each of the chiller units 30, and may be configured to control start and stop of the chiller units 30 and/or increase or decrease load based on the load and state of the chiller units 30, so as to implement scheduling of the chiller units 30.
For example: the centralized controller is used for dispatching the number of running units of the water chilling unit by acquiring the load and the state of the water chilling unit.
Therefore, only the unit is scheduled to start and stop and load and unload through the integrated controller, the control mode is simple and convenient, and the reliability is high.
In an optional specific example, the controlling, by the centralized controller 20, the load increase and the load decrease of the water chilling unit 30 may specifically include: and when the load is greater than a preset value, loading the number of the opened water chilling units 30 one by one from a preset minimum number.
For example: when the load is high, the load is loaded from one unit to another.
In an optional specific example, the controlling, by the centralized controller 20, the loading and unloading of the water chilling unit 30 may specifically further include: and when the load is less than or equal to the preset value, the number of the opened water chilling units 30 is decreased one by one from the preset maximum number.
For example: when the load is low, the load is relieved one by one.
Therefore, loading and unloading are achieved in a loading or unloading mode one by one, stability and reliability of air conditioner operation in the loading and unloading process are guaranteed, and comfort experience of users can be improved.
In an alternative example, the number of distributed controllers 22 is adapted to the number of chiller units. Referring to the example shown in fig. 3, each of the distributed controllers 22, which is adapted to one of the chiller units 30 and the external device 40 thereof, may be configured to control the start and stop of the external device 40 based on the operation logic of the chiller unit 30.
For example: the modular splicing combination can be carried out according to the scale of the system, both a small system and a large system can be suitable, the equipment wiring is clearer and more convenient, the program quantity distribution of the controller is more reasonable, the logic of the centralized controller is simpler and more convenient, the uncertainty and instability caused by complex logic are reduced, and the machine room group control of various water systems is met.
For example: each set of distributed controller controls and monitors the butterfly valve of the unit, the chilled water pump, the cooling tower fan and various sensors through control cables.
Therefore, the distributed controller controls the external equipment according to the unit logic, and the stability and the independence of the system operation can be ensured.
Optionally, referring to the example shown in fig. 3, the external device 40 may include: at least one of a unit butterfly valve 400, a chilled water pump 402, a cooling water pump 404, a cooling tower fan 406, and a sensor 408, which are adapted to be disposed with the chiller 30 for standby.
Optionally, the operation logic of the water chilling unit 30 may include: at least one start-stop signal for chilled water pump 402, cooling water pump 404, and cooling tower blower 406.
In an optional specific example, the controlling, by the distributed controller 22, the starting and stopping of the external device 40 may specifically include: when the operation logic of the water chilling unit 30 is a closing signal of the chilled water pumps 402, a preset number of external chilled water pumps 402 to be used and unit butterfly valves 400 are started.
For example: when the distributed controller monitors (for example, can monitor through a sensor) that the water pump at the use side is closed, an external available chilled water pump and a unit butterfly valve are started.
In an optional specific example, the controlling, by the distributed controller 22, the starting and stopping of the external device 40 may specifically further include: and when the operation logic of the water chilling unit 30 is a closing signal of the cooling water pumps 404, starting a preset number of external standby cooling water pumps 404.
For example: and when the heat source detects a closing signal of the water pump, starting an available cooling water pump.
In an optional specific example, the controlling, by the distributed controller 22, the starting and stopping of the external device 40 may specifically further include: and when the operation logic of the water chilling unit 30 is a closing signal of the cooling tower fans 406, starting a preset number of externally-connected cooling tower fans 406 to be used.
For example: when the fan of the cooling tower is closed, a set of available cooling tower and the fan thereof are started.
Therefore, the control logic of the water chilling unit is fully utilized, the system failure rate is reduced, the stable operation of the system is realized through the combination of the centralized type and the distributed type, the reliability is high, and the user experience is good.
In an optional embodiment, each of the distributed controllers 22 is further adapted to the centralized controller 20, and configured to feed back a fault signal of the external device 40 to the centralized controller 20 when the external device 40 fails.
Optionally, the centralized controller 20 may be further configured to shut down the chiller 30 of the water circuit in which the fault signal is located based on the fault signal.
For example: when equipment fails, a fault signal is fed back to the integrated controller, and the integrated controller timely closes the units in the corresponding water paths, so that the system safety is guaranteed.
Therefore, when the centralized controller breaks down, each set of distributed system can also run independently, and the reliability and the safety of the group control system are greatly ensured.
In an alternative embodiment, referring to the example shown in fig. 2, the method may further include: at least one of the monitoring center 10 and the communication device 50.
In an optional example, the monitoring center 10, adapted to the centralized controller 10, may be configured to display and/or assist in controlling the operation of the water chilling unit 30 and/or the operation of the external device 40.
For example: the top layer is a monitoring computer which is used as a human-computer interaction interface of the whole system (namely, a modular machine room group control system based on the control logic of the water chilling unit), and the operation state of the system can be monitored in real time and manual or automatic control can be carried out on equipment.
For example: and controlling the system in a manual mode or an automatic mode.
Optionally, referring to the example shown in fig. 3, the monitoring center 10 may include: the computer 100 is monitored.
Therefore, the stability and the independence of the operation of the system where the air conditioner is located can be ensured through the display and/or the auxiliary control of the monitoring center, and the system has strong intuition and good humanization.
In an alternative example, the communication device 50 is adapted to at least one of the centralized controller 10, the chiller 30 and the external device 40, and can be used to provide a communication connection.
Therefore, network control can be realized through the communication device, convenience and timeliness of control are further improved, and flexibility is good.
Optionally, the communication device 50 may include: ethernet module and/or ModBus RTU communication cable.
In an alternative example, the monitoring center 10 and the centralized controller 20 are connected via an ethernet network provided by the ethernet module.
In an optional example, the centralized controller 20 is connected to the chiller 30 and/or the external device 40 through the ModBus RTU communication cable.
For example: the centralized controller is upwards connected with the monitoring computer through the Ethernet and downwards connected with a single or a plurality of water chilling units through an RTU (remote terminal unit) communication cable of a ModBus (namely the first bus protocol really used for industrial fields all over the world).
For example: each water chilling unit is connected with the distributed controller through a control cable, and start and stop signals of various devices are provided for the distributed controller.
For example: the distributed controller is respectively matched with the water chilling unit 30 and the external equipment 40 and is connected with the centralized controller through a ModBus RTU communication cable.
Therefore, the reliability and convenience of network control implementation can be better improved through the communication devices in various forms.
Through a large number of tests, the technical scheme of the embodiment is adopted, the modular construction of the central air conditioner room group control system is realized through the combination of a centralized network and a distributed network based on the control logic of the water chilling unit, the system is controlled in a manual mode or an automatic mode, and the running stability, the independence and the expandability of the system are ensured.
According to the embodiment of the invention, a machine room system (such as a modular machine room group control system) corresponding to the control system of the machine room air conditioner is also provided. The machine room system may include: the control system described above.
Wherein, when the control system may comprise the centralized controller 20 and the distributed controllers 22, the number of the distributed controllers 22 is adapted to the scale of the machine room.
Therefore, based on the control logic of the water chilling unit, the modularized building of the central air conditioner room group control system is realized by combining a centralized network and a distributed network, the expansion convenience is good, and the user experience is good.
In an alternative embodiment, the modular machine room group control system may be a modular machine room group control system based on a chiller control logic. For example: referring to the example shown in fig. 3, a network architecture of the system (i.e., a modular machine room group control system based on chiller control logic) may be shown.
The modularization refers to a process of dividing a system into a plurality of modules layer by layer from top to bottom when a complex problem is solved, and the modules have various attributes and respectively reflect the internal characteristics of the modules.
In an optional example, the topmost layer is a monitoring computer, which is used as a human-computer interaction interface of the whole system (i.e., a modular machine room group control system based on the control logic of the chiller), and can monitor the operation state of the system in real time and manually or automatically control the equipment.
In an alternative example, the centralized controller is connected to the monitoring computer via an ethernet connection upwards and to one or more chiller units via ModBus (i.e., the first bus protocol used in industrial fields worldwide) RTU communication cables downwards.
Optionally, the centralized controller is used for scheduling the number of running units (i.e. chiller units) by acquiring the load and state of the chiller units (i.e. chiller units). When the load is high, the load is loaded from one unit to another. When the load is low, the load is relieved one by one.
For example: the state of the unit may include: the system comprises a set start-stop state, a compressor running state, a fault state, a use side water pump state, a heat source water measuring pump state, a cooling tower fan state and the like; the centralized controller needs to detect the states of the units in real time, judge whether the units are normal or not, and timely close the failed units.
For example: when the load and the state of the unit are collected, the load and the state of the unit can be acquired through a unit Modbus communication protocol, the integrated controller serves as a master station, the unit serves as a slave station, and the data of the master station and the data of the slave station are read by the integrated controller.
In an optional example, each water chilling unit is connected with the distributed controller through a control cable to provide start and stop signals of various types of equipment for the distributed controller.
Optionally, each set of distributed controller controls and monitors the unit butterfly valve, the chilled water pump, the cooling tower fan and various sensors through control cables.
For example: various sensors can detect the temperature and pressure of water supply and return of the freezing main pipe, the temperature of water supply and return of the cooling main pipe, outdoor temperature and humidity and the like.
Optionally, the distributed controller is respectively adapted to the water chilling unit 30 and the external device 40, and is connected to the centralized controller through a ModBus RTU communication cable. When equipment fails, a fault signal is fed back to the integrated controller, and the integrated controller timely closes the units in the corresponding water paths, so that the system safety is guaranteed.
For example: the fault state of the equipment can be judged by a closing signal and a program of the intermediate relay, and when the distributed controller detects a fault signal, the fault signal is sent to the centralized controller through a Modbus protocol.
Therefore, the modular machine room group control system mainly utilizes the control logic of the water chilling unit, the centralized controller only carries out scheduling control on the unit, and the unit provides start and stop signals of the water pump (freezing water pump) at the use side, the water pump (cooling water pump) at the heat source side and the fan of the cooling tower to the distributed controller. For example: when the distributed controller monitors (for example, can monitor through the sensor) that the water pump of the use side closes the signal, open a available chilled water pump and unit butterfly valve of external connection; when the heat source detects a closing signal of the water pump, starting an available cooling water pump; when the fan of the cooling tower is closed, a set of available cooling tower and the fan thereof are started.
For example: the sensor is mainly used for detecting the temperature and the pressure of the supply water and the return water of the main pipe and controlling the frequency of a fan of the cooling tower, the frequency of the freezing water pump, the frequency of the cooling water pump and the like through program logic judgment.
For example: a sensor, may include: a freezing main water supply and return temperature sensor, a pressure sensor, a cooling main water supply and return temperature sensor, an outdoor temperature and humidity sensor and the like.
In addition, the modular machine room group control system can be subjected to modular splicing combination according to the scale of the system, both a small system and a large system can be suitable, equipment wiring is clearer and more convenient, the distribution of the program quantity of the controller is more reasonable, the logic of the centralized controller is simpler and more convenient, the uncertainty and instability caused by complex logic are reduced, and the machine room group control of various water systems is met.
Since the processes and functions implemented by the apparatus of this embodiment substantially correspond to the embodiments, principles and examples of the method shown in fig. 1 to 3, the description of this embodiment is not detailed, and reference may be made to the related descriptions in the foregoing embodiments, which are not repeated herein.
Through a large number of tests, the technical scheme of the invention is adopted, the control logic of the water chilling unit is fully utilized, the system failure rate is reduced, the stable operation of the system is realized by combining the centralized type and the distributed type, when the centralized controller fails, each set of distributed system can also operate independently, the reliability and the safety of a group control system are greatly ensured, and the modular construction can be carried out according to central air-conditioning machine room systems of different scales.
According to the embodiment of the invention, a control method of the machine room system corresponding to the machine room system is also provided. The control method of the computer room system may include: for the machine room system, controlling the operation of the water chilling unit 30; and controlling the operation of the external equipment 40 of the water chilling unit 30 based on the operation logic of the water chilling unit 30.
For example: the water chilling unit self-control logic is mainly utilized, the centralized controller only carries out scheduling control on the water chilling unit, and the water chilling unit provides start-stop signals of a use side water pump (freezing water pump), a heat source side water pump (cooling water pump) and a cooling tower fan to the distributed controller.
Therefore, the running of the water chilling unit is controlled, the running of the external equipment of the water chilling unit is controlled based on the control logic of the water chilling unit, the fault rate of the system can be controlled, and the running stability of the system is improved.
In an alternative example, when the machine room system may include the centralized controller 20, the logic for controlling the operation of the chiller 30 may include: by the centralized controller 20, based on the load and the state of the chiller 30, the start and stop of the chiller 30 and/or the load increase and decrease are controlled, so as to realize the scheduling of the chiller 30.
For example: the centralized controller is used for dispatching the number of running units of the water chilling unit by acquiring the load and the state of the water chilling unit.
Therefore, only the unit is scheduled to start and stop and load and unload through the integrated controller, the control mode is simple and convenient, and the reliability is high.
Optionally, controlling the start-stop and/or the load increase and the load decrease of the water chilling unit 30 may specifically include: and when the load is greater than a preset value, loading the number of the opened water chilling units 30 one by one from a preset minimum number.
For example: when the load is high, the load is loaded from one unit to another.
Optionally, controlling the start-stop and/or load shedding of the water chilling unit 30 may specifically include: and when the load is less than or equal to the preset value, the number of the opened water chilling units 30 is decreased one by one from the preset maximum number.
For example: when the load is low, the load is relieved one by one.
Therefore, loading and unloading are achieved in a loading or unloading mode one by one, stability and reliability of air conditioner operation in the loading and unloading process are guaranteed, and comfort experience of users can be improved.
In an optional example, when the machine room system may further include the distributed controller 22, controlling the start and stop of the external device 40 based on the operation logic of the chiller 30 may include: and controlling the starting and stopping of the external equipment 40 through the distributed controller 22 based on the operation logic of the water chilling unit 30.
For example: the modular splicing combination can be carried out according to the scale of the system, both a small system and a large system can be suitable, the equipment wiring is clearer and more convenient, the program quantity distribution of the controller is more reasonable, the logic of the centralized controller is simpler and more convenient, the uncertainty and instability caused by complex logic are reduced, and the machine room group control of various water systems is met.
For example: each set of distributed controller controls and monitors the butterfly valve of the unit, the chilled water pump, the cooling tower fan and various sensors through control cables.
Therefore, the distributed controller controls the external equipment according to the unit logic, and the stability and the independence of the system operation can be ensured.
Optionally, when the external device 40 may include at least one of the unit butterfly valve 400, the chilled water pump 402, the cooling water pump 404, and the cooling tower fan 406, controlling starting and stopping of the external device 40 may specifically include: when the operation logic of the water chilling unit 30 is a closing signal of the chilled water pumps 402, a preset number of external chilled water pumps 402 to be used and unit butterfly valves 400 are started.
Optionally, controlling the start and stop of the external device 40 may specifically include: when the operation logic of the water chilling unit 30 is a closing signal of the chilled water pumps 402, a preset number of external chilled water pumps 402 to be used and unit butterfly valves 400 are started.
For example: when the distributed controller monitors (for example, can monitor through a sensor) that the water pump at the use side is closed, an external available chilled water pump and a unit butterfly valve are started.
Optionally, controlling the start and stop of the external device 40 may specifically include: and when the operation logic of the water chilling unit 30 is a closing signal of the cooling water pumps 404, starting a preset number of external standby cooling water pumps 404.
For example: and when the heat source detects a closing signal of the water pump, starting an available cooling water pump.
Optionally, controlling the start and stop of the external device 40 may specifically include: and when the operation logic of the water chilling unit 30 is a closing signal of the cooling tower fans 406, starting a preset number of externally-connected cooling tower fans 406 to be used.
For example: when the fan of the cooling tower is closed, a set of available cooling tower and the fan thereof are started.
Therefore, the control logic of the water chilling unit is fully utilized, the system failure rate is reduced, the stable operation of the system is realized through the combination of the centralized type and the distributed type, the reliability is high, and the user experience is good.
In an optional embodiment, when the computer room system may include the centralized controller 20 and the distributed controller 22, the computer room system may further include: when the external device 40 fails, the distributed controller 22 feeds back a failure signal of the external device 40 to the centralized controller 20.
Optionally, the centralized controller 20 turns off the chiller 30 of the waterway in which the fault signal is located based on the fault signal.
For example: when equipment fails, a fault signal is fed back to the integrated controller, and the integrated controller timely closes the units in the corresponding water paths, so that the system safety is guaranteed.
Therefore, when the centralized controller breaks down, each set of distributed system can also run independently, and the reliability and the safety of the group control system are greatly ensured.
In an alternative embodiment, the method may further include: when the machine room system comprises the monitoring center 10, the operation of the water chilling unit 30 and/or the operation of the external equipment 40 are/is displayed and/or auxiliary controlled through the monitoring center 10.
For example: the top layer is a monitoring computer which is used as a human-computer interaction interface of the whole system (namely, a modular machine room group control system based on the control logic of the water chilling unit), and the operation state of the system can be monitored in real time and manual or automatic control can be carried out on equipment.
For example: and controlling the system in a manual mode or an automatic mode.
Therefore, the stability and the independence of the operation of the system where the air conditioner is located can be ensured through the display and/or the auxiliary control of the monitoring center, and the system has strong intuition and good humanization.
In an alternative embodiment, the method may further include: when the machine room system comprises the communication device 50, a communication connection is provided through the communication device 50.
For example: the monitoring center 10 is connected to the centralized controller 20 through an ethernet network provided by the ethernet module.
For example: the centralized controller 20 is connected with the water chilling unit 30 and/or the external device 40 through the ModBus RTU communication cable.
Therefore, network control can be realized through the communication device, convenience and timeliness of control are further improved, and flexibility is good.
In an optional embodiment, when the computer room system may include the centralized controller 20 and the distributed controller 22, the computer room system may further include: based on the scale of the machine room, the number of the distributed controllers 22 is set in an adaptive mode, so that modular construction of the machine room system is achieved.
Therefore, the central air conditioner room systems with different scales are modularly constructed, so that the hardware and software modularization of the air conditioner in the room system is realized, and the stability, the independence and the expandability of the system operation can be ensured.
Since the processing and functions implemented by the control method of this embodiment basically correspond to the embodiments, principles and examples of the computer room system, the description of this embodiment is not given in detail, and reference may be made to the related descriptions in the embodiments, which are not described herein again.
Through a large number of tests, the technical scheme of the invention is adopted, only the start and stop and load increase and decrease of the unit are scheduled by the centralized controller, and the distributed controller controls the external equipment according to the unit logic, so that the hardware and software are modularized, and the stability and independence of the system operation are ensured.
In summary, it is readily understood by those skilled in the art that the advantageous modes described above can be freely combined and superimposed without conflict.
The above description is only an example of the present invention, and is not intended to limit the present invention, and it is obvious to those skilled in the art that various modifications and variations can be made in the present invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the scope of the claims of the present invention.
Claims (14)
1. A control system of a machine room air conditioner, comprising: the system comprises a centralized controller (20), a distributed controller (22), a water chilling unit (30) and an external device (40); wherein,
the centralized controller (20) is used for controlling the operation of the water chilling unit (30);
the distributed controller (22) is respectively matched with the water chilling unit (30) and the external equipment (40) and is used for controlling the operation of the external equipment (40) of the water chilling unit (30) based on the operation logic of the water chilling unit (30).
2. The control system according to claim 1, wherein the number of the water chilling units (30) is more than one; wherein,
the centralized controller (20) is respectively matched with each water chilling unit (30) and is used for controlling the start and stop and/or load increase and load decrease of the water chilling units (30) based on the load and the state of the water chilling units (30) so as to realize the dispatching of the water chilling units (30);
the number of the distributed controllers (22) is matched with the number of the water chilling units; each distributed controller (22) is adaptive to one water chilling unit (30) and the external equipment (40) thereof, and is used for controlling the starting and stopping of the external equipment (40) based on the operation logic of the water chilling unit (30).
3. The control system according to claim 2, wherein the centralized controller (20) controls the load and the load of the water chilling unit (30), and specifically comprises:
when the load is larger than a preset value, loading the number of the opened water chilling units (30) one by one from a preset minimum number;
or when the load is less than or equal to the preset value, the number of the opened water chilling units (30) is reduced one by one from the preset maximum number.
4. The control system according to claim 2 or 3,
the external device (40) comprises: at least one of a unit butterfly valve (400), a chilled water pump (402), a cooling water pump (404), a cooling tower fan (406) and a sensor (408) which are matched with the water chilling unit (30) for standby; when the external equipment (40) comprises the sensor (408), the sensor (408) is used for acquiring the temperature and the pressure of the water supply and return of a main pipe of the water chilling unit (30) so as to be used for the distributed controller (22) to judge and control the frequency of at least one of the chilled water pump (402), the cooling water pump (404) and the cooling tower fan (406);
and/or the presence of a gas in the gas,
the operating logic of the chiller (30) comprising: at least one start-stop signal for a chilled water pump (402), a cooling water pump (404), and a cooling tower fan (406);
wherein,
the distributed controller (22) controls the start and stop of the external device (40), and specifically comprises:
when the operation logic of the water chilling unit (30) is a closing signal of the chilled water pumps (402), starting a preset number of external chilled water pumps (402) to be used and unit butterfly valves (400);
or when the operation logic of the water chilling unit (30) is a closing signal of the cooling water pumps (404), starting a preset number of externally-connected standby cooling water pumps (404);
or when the operation logic of the water chilling unit (30) is a closing signal of the cooling tower fans (406), starting a preset number of externally-connected standby cooling tower fans (406).
5. The control system according to any one of claims 2 to 4, wherein each of the distributed controllers (22) is further adapted and arranged with the centralized controller (20) for feeding back a fault signal of the external device (40) to the centralized controller (20) when the external device (40) is faulty;
the centralized controller (20) is also used for turning off the water chilling unit (30) of the waterway in which the fault signal is positioned based on the fault signal.
6. The control system according to any one of claims 1 to 5, further comprising: at least one of a monitoring center (10) and a communication device (50);
the monitoring center (10) is adaptive to the centralized controller (10) and is used for displaying and/or performing auxiliary control on the operation of the water chilling unit (30) and/or the operation of the external equipment (40);
the communication device (50) is matched with at least one of the centralized controller (10), the water chilling unit (30) and the external equipment (40) and used for providing communication connection.
7. The control system of claim 6,
the monitoring center (10) comprises: a monitoring computer (100);
and/or the presence of a gas in the gas,
the communication device (50) comprising: an Ethernet module and/or a ModBus RTU communication cable; wherein,
the monitoring center (10) is connected with the centralized controller (20) through the Ethernet provided by the Ethernet module;
the centralized controller (20) is connected with the water chilling unit (30) and/or the external equipment (40) through the ModBus RTU communication cable.
8. A machine room system, comprising: a control system as claimed in any one of claims 1 to 7; wherein,
when the control system comprises the centralized controller (20) and the distributed controllers (22), the number of the distributed controllers (22) is adapted to the size of the machine room.
9. A control method of a machine room system, comprising:
for the machine room system of claim 8, controlling the operation of the chiller (30); and the number of the first and second groups,
controlling the operation of the external equipment (40) of the water chilling unit (30) based on the operation logic of the water chilling unit (30).
10. The method of claim 9, wherein when the machine room system includes the centralized controller (20), controlling the operating logic of the chiller (30) comprises:
controlling, by the centralized controller (20), start and stop, and/or load increase and decrease of the chiller (30) based on the load and state of the chiller (30) to realize scheduling of the chiller (30); wherein,
controlling the start and stop, and/or the load increase and the load decrease of the water chilling unit (30), specifically comprising:
when the load is larger than a preset value, loading the number of the opened water chilling units (30) one by one from a preset minimum number;
or when the load is less than or equal to the preset value, the number of the opened water chilling units (30) is reduced one by one from the preset maximum number.
11. The method of claim 9 or 10, wherein controlling the start and stop of the external device (40) based on the operational logic of the chiller (30) when the machine room system further comprises the distributed controller (22) comprises:
controlling, by the distributed controller (22), start and stop of the external device (40) based on the operation logic of the water chilling unit (30); wherein,
when the external device (40) comprises at least one of the unit butterfly valve (400), the chilled water pump (402), the cooling water pump (404) and the cooling tower fan (406), controlling the starting and stopping of the external device (40), specifically comprising:
when the operation logic of the water chilling unit (30) is a closing signal of the chilled water pumps (402), starting a preset number of external chilled water pumps (402) to be used and unit butterfly valves (400);
or when the operation logic of the water chilling unit (30) is a closing signal of the cooling water pumps (404), starting a preset number of externally-connected standby cooling water pumps (404);
or when the operation logic of the water chilling unit (30) is a closing signal of the cooling tower fans (406), starting a preset number of externally-connected standby cooling tower fans (406).
12. The method according to one of claims 9 to 11, wherein when the machine room system comprises the centralized controller (20) and the distributed controller (22), further comprising:
feeding back, by the distributed controller (22), a fault signal of the external device (40) to the centralized controller (20) when the external device (40) is in fault;
and turning off the water chilling unit (30) of the waterway in which the fault signal is positioned through the centralized controller (20) based on the fault signal.
13. The method according to one of claims 9-12, further comprising:
when the machine room system comprises the monitoring center (10), displaying and/or performing auxiliary control on the operation of the water chilling unit (30) and/or the operation of the external equipment (40) through the monitoring center (10);
and/or the presence of a gas in the gas,
when the machine room system comprises the communication device (50), a communication connection is provided through the communication device (50).
14. The method according to one of claims 9 to 13, wherein when the machine room system comprises the centralized controller (20) and the distributed controller (22), further comprising:
and based on the scale of the machine room, the number of the distributed controllers (22) is set in an adaptive mode so as to realize the modular construction of the machine room system.
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