CN108168043B - Variable flow active energy-saving automatic control system of central air-conditioning water system - Google Patents
Variable flow active energy-saving automatic control system of central air-conditioning water system Download PDFInfo
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- CN108168043B CN108168043B CN201711494078.3A CN201711494078A CN108168043B CN 108168043 B CN108168043 B CN 108168043B CN 201711494078 A CN201711494078 A CN 201711494078A CN 108168043 B CN108168043 B CN 108168043B
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 148
- 238000004378 air conditioning Methods 0.000 title claims abstract description 31
- 238000004891 communication Methods 0.000 claims description 32
- 238000001514 detection method Methods 0.000 claims description 12
- 238000001816 cooling Methods 0.000 claims description 11
- 238000009826 distribution Methods 0.000 claims description 10
- 238000004364 calculation method Methods 0.000 claims description 9
- 230000001502 supplementing effect Effects 0.000 claims description 7
- 230000003287 optical effect Effects 0.000 claims description 3
- 238000005265 energy consumption Methods 0.000 abstract description 21
- 230000000694 effects Effects 0.000 abstract description 6
- 239000002699 waste material Substances 0.000 abstract description 5
- 238000006243 chemical reaction Methods 0.000 abstract description 3
- 239000000498 cooling water Substances 0.000 description 13
- 230000006870 function Effects 0.000 description 7
- 230000001276 controlling effect Effects 0.000 description 6
- 230000006872 improvement Effects 0.000 description 6
- 230000003020 moisturizing effect Effects 0.000 description 6
- 238000000034 method Methods 0.000 description 5
- 230000008569 process Effects 0.000 description 5
- 230000008859 change Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 238000004134 energy conservation Methods 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- 239000013307 optical fiber Substances 0.000 description 4
- 238000013461 design Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 230000007246 mechanism Effects 0.000 description 3
- 238000005057 refrigeration Methods 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 238000011217 control strategy Methods 0.000 description 2
- 238000007710 freezing Methods 0.000 description 2
- 230000008014 freezing Effects 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 230000003044 adaptive effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000001808 coupling effect Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 238000007639 printing Methods 0.000 description 1
- 239000003507 refrigerant Substances 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 239000007858 starting material Substances 0.000 description 1
- 238000004781 supercooling Methods 0.000 description 1
- 230000000699 topical effect Effects 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating
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Abstract
The invention discloses a variable flow active energy-saving automatic control system of a central air-conditioning water system, which comprises an integral system control cabinet, wherein the integral system control cabinet comprises a water chilling unit control cabinet, a total control PLC cabinet and workshop sub-control PLC cabinets, the water chilling unit control cabinet and the total control PLC cabinet are connected through cables, the total control PLC cabinet is connected with each workshop sub-control PLC cabinet through cables, and each workshop sub-control PLC cabinet is connected with a temperature control fan of a corresponding workshop in parallel. The PLC intelligent device is used for controlling the flow of the water system of each water chilling unit of the whole system and controlling the start and stop of the temperature control fans at corresponding positions, so that the self-adaptive temperature adjustment is completed, the intelligent supply is realized, the energy consumption conversion in the system is fully utilized, the energy consumption utilization rate is improved, the waste of the energy consumption of the middle ring is effectively reduced, the sub-control PLC cabinets of each workshop are connected to the temperature control fans of the corresponding workshop in parallel, the start and stop control of each temperature control fan of each sub-workshop is realized, the temperature control effect is direct and efficient, and the energy consumption is saved.
Description
Technical Field
The invention relates to a variable flow active energy-saving automatic control system of a central air-conditioning water system.
Background
The engineering background technology is that the water system centralized central air conditioner or the semi-centralized central air conditioner has the characteristics of larger system operation structure, large internal water capacity, large system without energy conservation, large stagnation when the system is operated, strong coupling property and the like. It is difficult to achieve accurate topical application and control. Particularly, the energy conservation is difficult when the air conditioning system involved in the large factory building supplies cold (heat).
The factory building is a large-space building, the square area is large, the vertical space is high, the energy consumption of air conditioning equipment almost accounts for most of the whole building, and particularly, how to enable the equipment to operate efficiently is a problem which must be considered by an air conditioning automatic control system. Aiming at the actual situation of the project, combining with the experience of an engineering automatic control system, an optimized control mode is adopted to meet the functional requirement of the building, and great economic benefit is brought to the building, so that the design scheme adopts an active energy-saving control strategy:
the system refrigerating (heating) in each workshop or each cross-region in the workshop can be subjected to energy-saving adjustment as required according to the production process requirements of each workshop. The whole air conditioning system and the automatic control system are matched with the energy required by the downstream automatically output according to the process requirements in each workshop. Thereby obtaining the energy-saving operation of the whole workshop air conditioning system.
The energy consumption of the central air conditioning system of the large building mainly comprises two parts, wherein one part is the energy consumption of refrigeration equipment for driving the refrigerant to circulate, and the other part is the transportation energy consumption for driving the water system to circulate. At present, the refrigeration equipment is basically constant flow refrigeration equipment, the water circulation system is basically constant flow circulation system, and although some water circulation systems are provided with variable frequency energy-saving technology, the water circulation system is actually controlled to circulate according to constant flow or constant pressure difference, and large-flow and small-temperature difference operation of the water system cannot be avoided, so that a great amount of waste of energy consumption of the water system is caused.
Disclosure of Invention
The invention aims to solve the technical problem of providing a variable flow active energy-saving automatic control system of a central air-conditioning water system, which can effectively realize flexible operation according to requirements in the use process, not only saves energy consumption, but also can be from a scheme for selecting the air-conditioning to be started according to production requirements, and does not waste energy due to the limitation of a one-on-all-on traditional air-conditioning mode.
In order to solve the technical problems, the invention adopts the following technical scheme: the utility model provides a central air conditioning water system variable flow initiative energy-conserving autonomous system which characterized in that: including whole system control cabinet, whole system control cabinet includes cooling water set switch board, total accuse PLC cabinet and workshop branch accuse PLC cabinet, and cooling water set switch board and total accuse PLC cabinet are connected through the cable, and total accuse PLC cabinet passes through each workshop branch accuse PLC cabinet of cable junction, and each workshop branch accuse PLC cabinet connects in parallel to the control by temperature change fan of corresponding workshop. The PLC intelligent device is used for controlling the flow of the water system of each water chilling unit of the whole system and controlling the start and stop of the temperature control fans at corresponding positions, so that the self-adaptive temperature adjustment is completed, the intelligent supply is realized, the energy consumption conversion in the system is fully utilized, the energy consumption utilization rate is improved, the waste of the energy consumption of the middle ring is effectively reduced, the sub-control PLC cabinets of each workshop are connected to the temperature control fans of the corresponding workshop in parallel, the start and stop control of each temperature control fan of each sub-workshop is realized, the temperature control effect is direct and efficient, and the energy consumption is saved.
As an improvement, be provided with multi-functional multiscale, load switch, frozen water pump converter, frozen water pump soft start, constant pressure moisturizing automatic control system, cooling water set remote control system on the cooling water set switch board, wherein load switch, frozen water pump converter, frozen water pump soft start, constant pressure moisturizing automatic control system establish ties on the water piping to with multi-functional multiscale connects in parallel, and cooling water set remote control system passes through the control module of optical cable connection cooling water set switch board and realizes remote operation for manual automatic operation of control cooling water set, frozen water pump, moisturizing pump. The soft start structure of the chilled water pump is adopted, the soft start structure is relatively straight, the rated rotation speed is gradually increased, the impact on the pump is small, the service life of system equipment is longer, the operation is more stable, and the efficiency is high.
As an improvement, a master control S7-1200PLC, an Ethernet switch, a signal isolator and a touch screen are arranged in the master control PLC control cabinet, and the master control S7-1200PLC is communicated to the signal isolator and the touch screen through communication lines. The master control PLC control cabinet is a core part of the whole system, and the PLC in the control cabinet controls all components in the system through a communication protocol and signal point positions.
As an improvement, the master control PLC control cabinet comprises a PLC central control system, a power distribution system, a water pump variable frequency system, an automatic constant pressure water replenishing system, a display screen, an upper computer control system, a remote control system, an air cooling screw cold and hot water unit, a flow calculation bypass system and a sub-workshop PLC control cabinet group, wherein the power distribution system, the water pump variable frequency system, the automatic constant pressure water replenishing system, the display screen, the upper computer control system, the remote control system, the air cooling screw cold and hot water unit, the flow calculation bypass system and the sub-workshop PLC control cabinet group are respectively connected in parallel to the PLC central control system, the power distribution system is connected with the PLC central control system through network communication or analog quantity acquisition and control, the water pump variable frequency control system and the air cooling screw cold and hot water unit are connected with the PLC central control system through network communication modes, the automatic constant pressure water replenishing system, the flow calculation bypass system is connected with the PLC central control system through analog quantity and communication, the sub-workshop PLC control cabinet group is connected with the PLC central control system through optical fiber communication modes, the display screen and the upper computer control system is connected with the PLC central control system through optical fiber, wherein the upper computer control system is connected with the remote control system through network communication connection, preferably in a 4G mode. Both network communication and analog quantity are 485 communication modes.
As an improvement, the air-cooled screw cold and hot water unit comprises air-cooled screw cold and hot water machines connected in parallel with a PLC central control system. And the control is performed respectively, each flow section is controlled, and the energy consumption utilization rate is high.
As an improvement, each workshop sub-control PLC control cabinet is respectively connected with a display screen system, a room temperature detection device and a water quantity control device, the display screen system is simultaneously connected with the room temperature detection device and the water quantity control device, the display screen system is connected with the corresponding workshop PLC control cabinet through a wire connection mode, and the room temperature detection device and the water quantity control device are connected with the corresponding workshop PLC control cabinet through an analog quantity mode.
As an improvement, the workshop sub-control PLC cabinets are located in each workshop and mainly comprise sub-control S7-200SMART PLC, SMART LINE touch screens, photoelectric converters and signal isolators, and the sub-control S7-200SMARTPLC are respectively connected with the SMART LINE touch screens, the photoelectric converters and the signal isolators through communication cables. The system is mainly used for controlling an executing mechanism and signal detection in a workshop, and can exchange data with a general control PLC.
The main control system generally comprises a control cabinet and a power cabinet. The communication between the control cabinet and the power cabinet uses MODBUS communication based on an RS485 network. The control cabinet mainly comprises a PLC, a touch screen, an industrial switch, a signal isolator and various low-voltage components.
The main hardware and software functions of the system are connected by an integrated Ethernet interface.
The technical scheme adopted by the invention has the beneficial effects that: the cooling water circulation system water pump is added with a frequency converter for control, and an electric proportional valve, a flow and temperature detection device are added on a branch at the same time, so that the variable flow and the cooling temperature are controlled in real time as required, and the structure principle is as follows: the system is designed into an all-weather unattended machine room, and an automatic control system can automatically operate according to the requirements of an air conditioning system and automatically adjust the working state of the system, and is adaptive to the change of the load of an external air conditioner. The variable flow active energy conservation of the water system is realized, so that the maximum energy conservation of the whole air conditioning system is realized.
The technical scheme of the invention aims at the actual situation of a large building, combines the experience of an engineering automatic control system, adopts an optimized control mode to meet the functional requirement of the building, and brings great economic benefit for the building, so the design scheme adopts an active energy-saving control strategy: the system can perform real-time variable flow energy-saving regulation on the whole process of refrigerating (heating) of each terminal according to the actual demands of the terminals of a large building. The whole air conditioning system and the automatic control system are matched with the energy required by the downstream automatically output according to the actual process requirements of each building. Thereby obtaining energy-saving operation of the air conditioning system of the whole building.
The application of the technical scheme can output the energy of the air conditioner as required, and the air conditioner can be automatically and locally started or integrally started according to the workshop production process in the operation of the system, so that the operation of equipment such as a refrigerating unit, a water pump and the like is not limited by the technology or the shutdown protection of the air conditioning system due to the local starting of the air conditioning system. The system can automatically adjust the energy output according to the change of local operation and match the requirement of the downstream end.
By the adoption of the scheme, building energy consumption of the air conditioning system is greatly reduced, the air conditioning system can flexibly operate according to requirements in the use process, energy consumption is saved, the scheme of opening the air conditioning can be selected according to production requirements, temperature control of each workshop is achieved, meanwhile, a fan at the relative position is opened, water flow of each sectional water circulation system is controlled, temperature control of each area of each workshop is achieved, specific in-place accurate control is achieved according to requirements, and energy is not wasted due to limitation of a one-opening full-opening traditional air conditioning mode.
Drawings
The invention is further described below with reference to the accompanying drawings:
FIG. 1 is a schematic diagram of a system architecture of an embodiment of the present invention;
FIG. 2 is an enlarged view of I in FIG. 1;
FIG. 3 is an enlarged view of II in FIG. 1;
FIG. 4 is a schematic diagram of the system operation of one embodiment of the present invention.
Detailed Description
The structural schematic diagrams of an embodiment of the present invention shown in fig. 1 to 4, where the variable flow active energy-saving automatic control system of the central air-conditioning water system in this embodiment includes an overall system control cabinet, where the overall system control cabinet includes a chiller control cabinet, a master control PLC cabinet and a workshop sub control PLC cabinet, the chiller control cabinet and the master control PLC cabinet are connected via cables, the master control PLC cabinet is connected to each workshop sub control PLC cabinet via cables, and each workshop sub control PLC cabinet is connected in parallel to a temperature control fan of a corresponding workshop. The PLC intelligent device is used for controlling the flow of the water system of each water chilling unit of the whole system and controlling the start and stop of the temperature control fans at corresponding positions, so that the self-adaptive temperature adjustment is completed, the intelligent supply is realized, the energy consumption conversion in the system is fully utilized, the energy consumption utilization rate is improved, the waste of the energy consumption of the middle ring is effectively reduced, the sub-control PLC cabinets of each workshop are connected to the temperature control fans of the corresponding workshop in parallel, the start and stop control of each temperature control fan of each sub-workshop is realized, the temperature control effect is direct and efficient, and the energy consumption is saved.
In this embodiment, be provided with multi-functional multiscale, load switch, frozen water pump converter, frozen water pump soft start, constant pressure moisturizing automatic control system, cooling water set remote control system on the cooling water set switch board, wherein load switch, frozen water pump converter, frozen water pump soft start, constant pressure moisturizing automatic control system establish ties on the water piping to connect in parallel with multi-functional multiscale, cooling water set remote control system passes through the control module of optical cable connection cooling water set switch board and realizes remote operation, controls manual automatic operation of cooling water set, frozen water pump, moisturizing pump. The soft start structure of the chilled water pump is adopted, the soft start structure is relatively straight, the rated rotation speed is gradually increased, the impact on the pump is small, the service life of system equipment is longer, the operation is more stable, and the efficiency is high.
In the embodiment, the total control PLC control cabinet comprises a total control S7-1200PLC, an Ethernet switch, a signal isolator and a touch screen, wherein the total control S7-1200PLC is communicated to the signal isolator and the touch screen through communication lines. The master control PLC control cabinet is a core part of the whole system, and the PLC in the control cabinet controls all components in the system through a communication protocol and signal point positions.
In this embodiment, the master control PLC control cabinet includes a PLC central control system, a power distribution system, a water pump variable frequency system, an automatic constant pressure water replenishing system, a display screen, an upper computer control system, a remote control system, an air cooling screw cold and hot water unit, a flow calculation bypass system and a sub-workshop PLC control cabinet set, wherein the power distribution system, the water pump variable frequency system, the automatic constant pressure water replenishing system, the display screen, the upper computer control system, the remote control system, the air cooling screw cold and hot water unit, the flow calculation bypass system and the sub-workshop PLC control cabinet set are respectively connected in parallel to the PLC central control system, the power distribution system is connected with the PLC central control system through network communication or analog quantity acquisition and control, the water pump variable frequency control system, the air cooling screw cold and hot water unit are connected with the PLC central control system through network communication modes, the automatic constant pressure water replenishing system, the flow calculation bypass system is connected with the PLC central control system through analog quantity and communication, the sub-workshop PLC control cabinet set is connected with the PLC central control system through optical fiber communication modes, the display screen and the upper computer control system is connected with the PLC central control system through optical fiber, wherein the upper computer control system is connected with the remote control system through network communication connection, preferably in a manner of APP 4G. Both network communication and analog quantity are 485 communication modes.
In this embodiment, the air-cooled screw water chiller-heater unit includes air-cooled screw water chiller-heater machines connected in parallel with a PLC central control system.
In the embodiment, each workshop PLC control cabinet is respectively connected with a display screen system, a room temperature detection device and a water quantity control device, the display screen system is simultaneously connected with the room temperature detection device and the water quantity control device, the display screen system is connected with the corresponding workshop PLC control cabinet through a wire connection mode, and the room temperature detection device and the water quantity control device are connected with the corresponding workshop PLC control cabinet through an analog quantity mode.
In this embodiment, the workshop sub-control PLC cabinets are located in each workshop and mainly comprise sub-control S7-200SMART PLCs, SMART LINE touch screens, photoelectric converters and signal isolators, and the sub-control S7-200SMARTPLC are respectively connected with the SMART LINE touch screens, the photoelectric converters and the signal isolators through communication cables. The system is mainly used for controlling an executing mechanism and signal detection in a workshop, and can exchange data with a general control PLC.
The main control system generally comprises a control cabinet and a power cabinet. The communication between the control cabinet and the power cabinet uses MODBUS communication based on an RS485 network. The control cabinet mainly comprises a PLC, a touch screen, an industrial switch, a signal isolator and various low-voltage components.
In this embodiment, the system has the main hardware and software functions, and an integrated ethernet interface.
The control relation diagram of the system is that the total control device is a PLC central control system,
The control cabinet can complete all functions listed in all technical requirements through communication and input and output signals, and the main functions are as follows: and monitoring the running state, running parameters, fault state and manual/automatic mode of the water chilling unit, and performing remote start-stop control and energy control.
According to the independent starting-up requirements of each branch of each factory building, the water supply/return temperature of the freezing water supply/return header pipe and the total water supply flow of the freezing station, the cold load is calculated, the number of the air-cooled screw module machines and the corresponding water pumps are determined to be started according to the change of the cold load, and the number and the proportion number of the air-cooled screw module machines can be controlled, so that the water chilling unit works in the optimal state, and the aim of saving energy is achieved at the maximum.
And starting and stopping corresponding water pumps according to the number of the running units, and carrying out corresponding interlocking and linkage, and simultaneously automatically adjusting the rotating speed of the water pump motor, thereby achieving the purpose of energy saving.
The equipment is effectively protected: displaying the running state and main parameters of the system; automatically recording and printing system data, and storing historical operation data according to the use requirement; reasonable group control, more comfortable system, avoiding supercooling and more easily meeting design requirements.
The unit starts each device smoothly according to the requirement of the air conditioner control system, and the starting sequence is as follows: branch proportional valve in factory building-chilled water pump-chiller; the shutdown sequence is as follows: a water chiller, a chilled water pump and a branch proportional valve in a factory building.
The voltage, the total current, the total power consumption and other data of the unit are monitored and stored in real time through a network protocol, and the power consumption in each period of time can be counted at any time.
And starting the chilled water pump and the corresponding electric butterfly valve, judging whether the chilled water flow is established or not, if not, judging that the chilled water pump fails by the control system, stopping the operation of the failed water pump, sending out failure alarm at the same time, and automatically starting the standby chilled water pump.
The water pumps in the system are operated according to the following embodiment, for example, three water pumps are controlled in a dual-purpose one-standby mode, when only one water chilling unit is used, the other two water pumps are started, starting and standby are started in turn according to a certain time, when the two units are started simultaneously, the corresponding two water pumps are started, one water pump is standby, the starting and standby water pumps are started in turn according to a certain time, and the rotation time of the starting and standby water pumps can be set on an interface by oneself.
Each chilled water pump is controlled by an independent frequency converter, operation and fault signals of the frequency converter are linked with the air-cooled screw unit, and relevant data of the frequency converter are collected to the control system through a communication line.
According to the minimum flow requirement of the air-cooled screw unit and the cold energy requirement of a factory building, the pressure difference of a water supply and return main pipe of the water system is automatically regulated through an electric proportional pressure difference bypass valve between water supply and return main pipes, so that the system is stable, and the aim of saving energy is achieved.
The outdoor environment temperature and humidity are collected by a temperature and humidity sensor. And comparing the acquired temperature value with the temperature in the factory building and the set value, and judging whether the air-cooled screw unit is started or not.
And a set of temperature sensors are respectively arranged in the areas in the factory building, a control system is acquired by data, the temperature of each point can be monitored at a terminal, and the opening of the electric proportional valve on each branch can be automatically controlled according to the comparison between the temperature value and the set temperature value of the factory building.
The power cabinet mainly comprises a multifunctional instrument, a voltmeter, a frequency converter, a soft starter and various low-voltage components. The power cabinet is controlled by the control cabinet through a communication line transmission signal and is provided with a mechanism for manually starting the circulating water pump, the water chilling unit and the constant-pressure water supplementing pump under the condition that the control system fails, and manual adjusting buttons are arranged on corresponding parts.
The constant-pressure water supplementing device comprises two water pumps, one water pump is used for one water pump, the two water pumps are replaced in turn, a remote pressure gauge arranged on the constant-pressure water supplementing device is connected to an automatic control system through a communication line, a signal is collected to the automatic control system, a low-liquid-level switch is also collected to the automatic control system, the starting and stopping of the water pumps are automatically controlled according to the collected signals of the remote pressure gauge and the constant-pressure requirement of a chilled water loop, the time and the constant-pressure value of the replacement in turn can be written in by a touch screen, and the collected low-liquid-level signal protects the water pump from idle running.
When the electric proportional valve is in four modes, the electric proportional valve is interlocked with the related air conditioner terminal equipment of each branch, namely, the main power supply of the air conditioner terminal equipment can be switched on only after a control switch of the electric proportional valve is switched on, and the equipment at the terminal of each air conditioner can be independently started and stopped.
When the electric proportional valve is in manual control, the electric proportional valve is firstly opened to a full-open position, an air conditioner terminal fan in the middle of each branch is also automatically started, other air conditioner terminal devices are independently and manually controlled to start and stop by a start-stop switch of each device on the centralized control box, corresponding indicator lamps are used for indicating, a temperature sensor is arranged at a return air inlet of the air conditioner terminal device which is automatically started, the temperature of a workshop is automatically detected and is uploaded to a sub-control system, meanwhile, the temperature value of the air conditioner terminal device is displayed on a touch screen of the independent sub-control system, and after a certain time, the independent control system can compare the detected temperature with a set temperature (the independent controller can be set) to control the opening degree of the electric proportional valve on the branch.
When the electric proportional valve is in an automatic gear, the electric proportional valve is firstly opened to a full-open position, one of the air conditioner terminal fans of each branch is also automatically started, other air conditioner terminal equipment is independently and manually controlled to start and stop by the start-stop switch of each equipment on the centralized control box, a corresponding indicator lamp is used for indicating, a temperature sensor is arranged at a return air inlet of the air conditioner terminal equipment which is automatically started, the temperature of a workshop is automatically detected and is uploaded to a total control system, and the total control system automatically controls the opening degree of the electric proportional valve on the branch according to the acquired temperature and the set temperature of a control room after a certain time.
When the electric proportional valve is in the air supply fence, the electric proportional valve is not opened at the moment and is in a closed state. The air conditioner terminal equipment in the workshop can be independently started and stopped by a control button of each equipment of the centralized control box, and is indicated by an indicator lamp. The condition is suitable for workshops without a cold source, and only air supply and ventilation are needed.
When the electric proportional valve is in the stop fence, the electric proportional valve is in a closed state, and air conditioner terminal equipment is also in a stop state.
The system has the main hardware and software functions, integrated Ethernet interfaces, and the following performances: a power supply (85-264V AC or 24V DC) integrated in the form of a broad AC or DC power supply; integrated digital output 24V DC or relay; integrating 24V DC digital quantity input; the input of the integrated analog quantity is 0-10V; pulse Train Output (PTO) at frequencies up to 100 kHz; pulse Width Modulation (PWM) output at frequencies up to 100 kHz; high Speed Counters (HSC) with frequencies up to 100 kHz; modularization and tailorability are realized by connecting additional communication modules (such as RS 485 or RS 232); the modularization and tailorability are realized by directly expanding analog quantity or digital quantity signals on the CPU through the signal board (meanwhile, the original space of the CPU is kept); modularity and tailorability (except for CPU 1211C) is achieved by a large number of analog and digital input and output signals of the signal module; an optional memory (SIMATIC memory card); PLCopen motion control for simple motion control; PID controller with self-tuning function; integrating a real-time clock; password protection; time interruption; a hardware interrupt; a library function; on-line/off-line diagnostics. And the hardware and software functional modules of the system are detachable, and the terminals on all the modules are detachable.
The analog quantity described in the above embodiment, namely, the proportional data of the water flow is used as the relative value of the quantity describing the water flow, instead of the conventional unit L or milliliter or ton, etc., so that the limitation of the conventional unit is more easily broken through, the requirement of the water flow is limited by the final effect, and the water flow is more direct in place and is convenient to detect.
In the above embodiment, the number of the temperature control areas of five areas is preferable, but not limited to, and the number of the temperature control areas can be adjusted according to the number of actually required control areas, so as to adapt to the control effect as a final purpose, and achieve the control effect.
In addition to the above preferred embodiments, the present invention has other embodiments, and various changes and modifications may be made by those skilled in the art without departing from the spirit of the invention, which is defined in the appended claims.
Claims (6)
1. The utility model provides a central air conditioning water system variable flow initiative energy-conserving autonomous system which characterized in that: the intelligent control system comprises an integral system control cabinet, the integral system control cabinet comprises a water chilling unit control cabinet, a total control PLC cabinet and a workshop sub-control PLC cabinet, the water chilling unit control cabinet and the total control PLC cabinet are connected through cables, the total control PLC cabinet is connected with each workshop sub-control PLC cabinet through the cables, each workshop sub-control PLC cabinet is connected with a temperature control fan of a corresponding workshop in parallel, the total control PLC cabinet comprises a PLC central control system, a power distribution system, a water pump variable frequency system, an automatic pressure water supplementing system, a display screen, an upper computer control system, a remote control system, an air cooling screw hot water unit, a flow calculation bypass system and a sub-workshop PLC control cabinet group, the power distribution system, the water pump variable frequency system, the air cooling screw hot water unit, the flow calculation bypass system, the display screen, the upper computer control system, the remote control system, the air cooling screw hot water unit, the flow calculation bypass system and the sub-workshop PLC control cabinet group are connected with the PLC central control system in parallel, wherein the power distribution system is connected with the PLC central control system through network communication or analog quantity acquisition and control system, the air cooling screw hot water unit is connected with the PLC central control system through the PLC central control system, the power distribution system is connected with the central control system through the PLC control system, the remote control system is connected with the PLC control system through the control system, and the control system is connected with the remote control system, and the control system is connected with the control system through the control system, and the control system.
2. The variable flow active energy-saving automatic control system of the central air-conditioning water system according to claim 1, wherein the multifunctional multi-meter, the load switch, the chilled water pump frequency converter, the chilled water pump soft start, the constant pressure water supplementing automatic control system and the remote control system of the water chilling unit are arranged on the water chilling unit control cabinet, the load switch, the chilled water pump frequency converter, the chilled water pump soft start and the constant pressure water supplementing automatic control system are connected in series on a water pipeline and connected with the multifunctional multi-meter in parallel, and the remote control system of the water chilling unit is connected with a control module of the water chilling unit control cabinet through an optical cable and realizes remote operation and is used for controlling manual and automatic operation of the water chilling unit, the chilled water pump and the water supplementing pump.
3. The variable flow active energy-saving automatic control system of the central air-conditioning water system according to claim 1, wherein the total control PLC cabinet is internally provided with a total control S7-1200PLC, an Ethernet switch, a signal isolator and a touch screen, and the total control S7-1200PLC is communicated to the signal isolator and the touch screen through communication lines.
4. The variable flow active energy-saving automatic control system of the central air-conditioning water system of claim 1, wherein the air-cooled screw cold and hot water unit comprises air-cooled screw cold and hot water machines connected with a PLC central control system in parallel.
5. The variable flow active energy-saving automatic control system of the central air-conditioning water system according to claim 1, wherein each workshop sub-control PLC control cabinet is respectively connected with a display screen system, a room temperature detection device and a water quantity control device, the display screen system is connected with the room temperature detection device and the water quantity control device at the same time, the display screen system is connected with the corresponding workshop PLC control cabinet through a wire connection mode, and the room temperature detection device and the water quantity control device are connected with the corresponding workshop PLC control cabinet through an analog quantity mode.
6. The variable flow active energy-saving automatic control system of the central air-conditioning water system according to claim 1, wherein the workshop sub-control PLC cabinets are positioned in each workshop and are mainly provided with sub-control S7-200SMARTPLC, SMART LINE touch screens, photoelectric converters and signal isolators, and the sub-control S7-200SMARTPLC is respectively connected with the SMARTLINE touch screens, the photoelectric converters and the signal isolators through communication cables.
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| CN110045765A (en) * | 2019-04-11 | 2019-07-23 | 骏马化纤股份有限公司 | The temperature control system in workshop |
| CN110818134A (en) * | 2019-11-21 | 2020-02-21 | 湖南俊翔科技发展有限公司 | Automatic monitoring control system of water plant |
| CN111594989A (en) * | 2020-04-30 | 2020-08-28 | 江苏省同远节能科技有限公司 | Efficient and energy-saving central air-conditioning energy management system and working method thereof |
| CN111880465B (en) * | 2020-05-29 | 2021-07-30 | 广汽菲亚特克莱斯勒汽车有限公司广州分公司 | General assembly workshop repair area exhaust fan control management system and method |
| CN114623529A (en) * | 2021-07-02 | 2022-06-14 | 洁禹通（青岛）环保科技有限责任公司 | Intelligent control method and device for circulating water treatment of refrigerating room |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102147146A (en) * | 2011-04-22 | 2011-08-10 | 黄真银 | Digital integrated intelligent control system of central air conditioner and adjusting method thereof |
| WO2013152503A1 (en) * | 2012-04-13 | 2013-10-17 | 北京聚天华节能科技发展有限公司 | Distributed control system for building ecology |
| CN208025747U (en) * | 2017-12-31 | 2018-10-30 | 宁波诚何机电有限公司 | Central air conditioning water system variable-flow active energy-saving self-controlling system |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201637032U (en) * | 2009-09-29 | 2010-11-17 | 上海朗诗建筑科技有限公司 | Fresh air conditioner control system |
| CN102607146B (en) * | 2012-04-06 | 2014-09-10 | 谭仲禧 | Central air-conditioning system and control method thereof |
| JP6330270B2 (en) * | 2013-08-07 | 2018-05-30 | 株式会社デンソーウェーブ | Central air conditioning system |
| CN103411293B (en) * | 2013-09-05 | 2015-12-09 | 刘新民 | The cooling water system for air conditioning control method regulated based on end cold initiative and device |
| WO2016197849A1 (en) * | 2015-06-09 | 2016-12-15 | 邻元科技（北京）有限公司 | Control method, cooling apparatus system, cooling apparatus controller, cooling tower system, cooling tower controller, water pump system, and water pump controller |
-
2017
- 2017-12-31 CN CN201711494078.3A patent/CN108168043B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102147146A (en) * | 2011-04-22 | 2011-08-10 | 黄真银 | Digital integrated intelligent control system of central air conditioner and adjusting method thereof |
| WO2013152503A1 (en) * | 2012-04-13 | 2013-10-17 | 北京聚天华节能科技发展有限公司 | Distributed control system for building ecology |
| CN208025747U (en) * | 2017-12-31 | 2018-10-30 | 宁波诚何机电有限公司 | Central air conditioning water system variable-flow active energy-saving self-controlling system |
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