CN108168043A - Central air conditioning water system variable-flow active energy-saving self-controlling system - Google Patents
Central air conditioning water system variable-flow active energy-saving self-controlling system Download PDFInfo
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- CN108168043A CN108168043A CN201711494078.3A CN201711494078A CN108168043A CN 108168043 A CN108168043 A CN 108168043A CN 201711494078 A CN201711494078 A CN 201711494078A CN 108168043 A CN108168043 A CN 108168043A
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 150
- 238000004378 air conditioning Methods 0.000 title claims abstract description 45
- 238000004891 communication Methods 0.000 claims description 36
- 238000009826 distribution Methods 0.000 claims description 9
- 238000004364 calculation method Methods 0.000 claims description 7
- 239000008400 supply water Substances 0.000 claims description 7
- 230000008901 benefit Effects 0.000 claims description 4
- 239000000835 fiber Substances 0.000 claims description 3
- 230000003287 optical effect Effects 0.000 claims description 3
- 239000013307 optical fiber Substances 0.000 claims description 3
- 238000004886 process control Methods 0.000 claims 1
- 238000005265 energy consumption Methods 0.000 abstract description 18
- 230000000694 effects Effects 0.000 abstract description 6
- 239000002699 waste material Substances 0.000 abstract description 6
- 238000006243 chemical reaction Methods 0.000 abstract description 5
- 230000006870 function Effects 0.000 description 6
- 230000006872 improvement Effects 0.000 description 6
- 238000005057 refrigeration Methods 0.000 description 6
- 238000001514 detection method Methods 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 5
- 238000001816 cooling Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 3
- 238000011217 control strategy Methods 0.000 description 2
- 239000000498 cooling water Substances 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 238000007710 freezing Methods 0.000 description 2
- 230000008014 freezing Effects 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 238000005457 optimization Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000003044 adaptive effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000007257 malfunction Effects 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
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- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 238000004321 preservation Methods 0.000 description 1
- 239000003507 refrigerant Substances 0.000 description 1
- 230000011218 segmentation Effects 0.000 description 1
- 230000011664 signaling Effects 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 238000010977 unit operation Methods 0.000 description 1
Classifications
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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 central air conditioning water system variable-flow active energy-saving self-controlling systems, including total system switch board, the total system switch board includes handpiece Water Chilling Units switch board, master control PLC rack and workshop sub-control PLC rack, handpiece Water Chilling Units switch board is connected with master control PLC rack via cable, master control PLC rack connects each workshop sub-control PLC rack by cable, and each workshop sub-control PLC rack is parallel-connected to the temperature control wind turbine in corresponding workshop.The start-up and shut-down control to each point handpiece Water Chilling Units water system flow control of whole system and the temperature control wind turbine of corresponding position is completed by PLC intelligent apparatus, complete the adjustment of self-adaptive temperature, realize intelligence because needing to supply, the conversion of energy consumption in system is made full use of, energy utilization rate is improved, effectively reduces the waste of intermediate link energy consumption, each workshop sub-control PLC rack is parallel-connected to the temperature control wind turbine in corresponding workshop, realize the start-up and shut-down control to each temperature control wind turbine for dividing workshop, temperature control effect is directly efficient, saves energy consumption.
Description
Technical field
The present invention relates to central air conditioning water system variable-flow active energy-saving self-controlling systems.
Background technology
This engineering background technology is water system centralization central air-conditioning or half centralized its general system operation of central air-conditioning
Structure is bigger, and internal water capacity is big, and system is big and not energy-efficient, and time lag is big during along with system operation, and coupling waits by force spies
Point.Accomplish that accurately part uses and control is relatively difficult.Especially to involved by large workshop during air-conditioning system cooling (heat)
It is energy saving particularly difficult.
This case workshop is large space building, and quadrature is big, vertical space is high, and air-conditioning equipment energy ezpenditure almost accounts for whole
How the overwhelming majority of a building, particularly water circulating pump, air-conditioning box unit and air-conditioning refrigerator system, make these equipment high efficiencies
Operation, is the problem of Air-conditioning system must take into consideration.For this item purpose actual conditions, with reference to our engineering robot control system(RCS) warps
It tests, the functional requirement of building is met using the control model of optimization, larger economic benefit, therefore this are brought for building
Designing scheme employs the control strategy of " actively energy saving "：
This case can according to the production technology demand in each workshop, in each workshop or workshop it is each it is trans-regional in
Cooling system (heat) carries out energy saving adjusting on demand.Entire air-conditioning system and automatic control system cooperation are according to the technique in each workshop
Demand exports the energy needed for downstream automatically.So as to obtain the energy-saving run of entire Workshop air conditioner system.
The energy consumption of big building central air conditioner system is mainly made of two parts, refrigeration of the part for driving refrigerant circulation
The energy consumption of equipment, another part are the conveying energy consumption of drive water system cycle.At present, refrigeration equipment is substantially constant flow refrigeration
Equipment, and water circulation system is substantially also the constant flow circulatory system, although some water circulation systems are equipped with energy-saving and frequency-variable skill
Art, but actually or by constant flow or constant-pressure drop control that water system recycles or water system big flow, small can not be avoided
Temperature difference operation, so as to cause a large amount of wastes of water system energy consumption.
Invention content
The technical problem to be solved in the present invention is to provide a kind of central air conditioning water system variable-flow active energy-saving self-controlling system,
It can effectively realize flexibly operation on demand in use, not only save energy consumption, but also unrestricted choice air-conditioning can be carried out by production requirement
The scheme of unlatching, the limitation for not opening the traditional air conditioning mode of standard-sized sheet by one and waste energy.
In order to solve the above technical problems, the technical solution adopted by the present invention is：Central air conditioning water system variable-flow actively saves
Energy robot control system(RCS), it is characterised in that：Including total system switch board, the total system switch board is controlled including handpiece Water Chilling Units
Cabinet, master control PLC rack and workshop sub-control PLC rack, handpiece Water Chilling Units switch board are connected with master control PLC rack via cable, and master control PLC rack leads to
It crosses cable and connects each workshop sub-control PLC rack, each workshop sub-control PLC rack is parallel-connected to the temperature control wind turbine in corresponding workshop.Pass through PLC
Intelligent apparatus completes the start and stop to each point handpiece Water Chilling Units water system flow control of whole system and the temperature control wind turbine of corresponding position
The adjustment of self-adaptive temperature is completed in control, realizes that intelligence because needing to supply, makes full use of the conversion of energy consumption in system, improves energy consumption
Utilization rate, effectively reduces the waste of intermediate link energy consumption, and each workshop sub-control PLC rack is parallel-connected to the temperature control wind in corresponding workshop
Machine realizes the start-up and shut-down control to each temperature control wind turbine in point workshop, and temperature control effect is directly efficient, saves energy consumption.
Become as an improvement being provided with multi-functional multilist, on-load switch, chilled water pump on the handpiece Water Chilling Units switch board
Soft of frequency device, chilled water pump, constant pressure supply water automatic control system, handpiece Water Chilling Units remote control system, wherein on-load switch, freezing
Soft of pump variable frequency device, chilled water pump, constant pressure supply water automatic control system are series in water lines, and with multi-functional multilist simultaneously
Connection, handpiece Water Chilling Units remote control system connect the control module of handpiece Water Chilling Units switch board by optical cable and realize remote operation, use
In control handpiece Water Chilling Units, chilled water pump, small pump manual automatic running.Using the chilled water pump structure of soft, relatively straight,
It is to progressively increase to rated speed, smaller to the impact of pump, the service life of system equipment is longer, and operation is more stable, efficiently.
As an improvement it is provided with master control S7-1200PLC, Ethernet switch, letter in the master control PLC control cabinet
Number isolator, touch screen, master control S7-1200PLC are connected to signal isolator and touch screen by communication line.Master control PLC is controlled
Cabinet processed is the core of whole system, and PLC passes through all in communications protocol and signal point-to-point control system in the switch board
Component part.
As an improvement the master control PLC control cabinet includes PLC central control systems, distribution system, pump variable frequency system
System, automatic constant pressure water charging system, display screen, upper computer control system, tele-control system, air-cooled screw water chiller-heater unit, stream
Amount calculates bypass system and divides workshop PLC control cabinet group, the distribution system, pump variable frequency system, automatic constant pressure water charging system,
Display screen, upper computer control system, tele-control system, air-cooled screw water chiller-heater unit, flow rate calculation bypath system and divide vehicle
Between PLC control cabinet group be connected in parallel to PLC central control systems respectively, wherein, distribution system passes through network communication or analog acquisition
And controller control PLC central control systems, variable frequency control system of water pumps, air-cooled screw water chiller-heater unit pass through network communication mode
PLC central control systems are connected, automatic constant pressure water charging system, flow rate calculation bypass system pass through analog quantity and communication connection PLC
Central control system divides workshop PLC control cabinet group to connect PLC central control systems, display screen and upper by fiber optic communication pattern
Position machine control system is connected to PLC central control systems by optical fiber, and wherein upper computer control system is coupled by network communication
Tele-control system and cell phone application, connect herein, preferably 4G connection modes.Network communication and analog quantity are all 485 communication moulds
Formula.
As an improvement the air-cooled screw water chiller-heater unit is including each air-cooled with the parallel connection of PLC central control systems
Screw rod water chiller/heater.It controls respectively, each flow section control, energy utilization rate is high.
As an improvement each workshop sub-control PLC control cabinet respectively with display screen system, room temperature detector, water
Amount control device couples, and the display screen system connects simultaneously with room temperature detector, water volume control device, the display screen system
System is coupled by line connection mode and corresponding workshop PLC control cabinet, and room temperature detector, water volume control device pass through analog quantity
Pattern and the connection of corresponding workshop PLC control cabinet.
As an improvement the workshop sub-control PLC rack is located in each workshop, sub-control S7-200SMART is mainly included
PLC, SMART LINE touch screens, photoelectric converter, signal isolator, sub-control S7-200SMARTPLC respectively with SMART LINE
Touch screen, photoelectric converter, signal isolator are connected by communication cable.The system is mainly used for controlling the execution machine in workshop
Structure and signal detection, and data can be exchanged with master control PLC.
Master control system leads to comprising switch board and power cabinet.Communication between switch board and power cabinet is used based on RS485
The MODBUS communications of network.Mainly include PLC, touch screen, industrial switch, signal isolator and all kinds of low pressure in switch board
Component.
The system main hardware software function is connected with integrated Ethernet interface.
The technical solution adopted by the present invention, advantage are：Cooling water recirculation system water pump increases Frequency Converter Control,
Branch road increases dynamoelectric proportion valve and flow, temperature-detecting device simultaneously, carries out the control of variable-flow and cooling temperature on demand in real time
System, structural principle are as follows：This system is designed as round-the-clock unattended equipment room, and robot control system(RCS) can be according to the demand of air-conditioning system
Automatic running, the working condition of automatic adjustment system, the variation of adaptive corresponding external air conditioner load.Realize the change of water system
Flow is actively energy saving, energy saving so as to fulfill the maximum of entire air-conditioning system.
Technical solution of the present invention, with reference to our engineering robot control system(RCS) experiences, is adopted aiming at the actual conditions of big building
Meet the functional requirement of building with the control model of optimization, larger economic benefit, therefore the design are brought for building
Scheme employs the control strategy of " actively energy saving "：This case can be according to the actual demand of the end of big building, to each not
The cooling system (heat) at end carries out the energy saving adjusting of the on-demand real-time variable-flow of overall process.Entire air-conditioning system and automatic control system are matched
Close the energy according to needed for the actual process demand of each building exports downstream automatically.So as to obtain whole building air-conditioning system
Energy-saving run.
The application of the technical program can be such that the energy of air-conditioning exports on demand, and being in system operation can be according to plant manufacturing process
To decide in its sole discretion, part is opened or whole unlatching air-conditioning, the equipment operation of freezing unit and water pump etc. are not opened locally by because of air-conditioning system
It opens and by technology restriction or air-conditioning system stoppage protection.System can be exported according to the variation adjust automatically energy locally run,
Coordinate the demand of downstream extremity.
The architectural energy consumption of air-conditioning system, and flexibly operation on demand in use are substantially reduced using this scheme,
Not only energy consumption is saved, but also the scheme of unrestricted choice air-conditioning unlatching can be carried out by production requirement, realizes each workshop temperature control, while opposite position
The wind turbine put is opened and the control of each segmentation water circulation system water flow, realizes each regional temperature control in each workshop, realizes specific
In place, accurately control according to demand, the limitation for not opening the traditional air conditioning mode of standard-sized sheet by one and waste energy.
Description of the drawings
The present invention will be further described below in conjunction with the accompanying drawings：
Fig. 1 is the system structure diagram of an embodiment of the present invention；
Fig. 2 is in Fig. 1 I enlarged drawing；
Fig. 3 is in Fig. 1 II enlarged drawing；
Fig. 4 is the system operation schematic diagram of an embodiment of the present invention.
Specific embodiment
The structure diagram of an embodiment of the present invention as shown in Figures 1 to 4, the central air-conditioning in the present embodiment
Water system variable-flow active energy-saving self-controlling system, including total system switch board, the total system switch board includes cooling-water machine
Group switch board, master control PLC rack and workshop sub-control PLC rack, handpiece Water Chilling Units switch board are connected with master control PLC rack via cable, master control
PLC rack connects each workshop sub-control PLC rack by cable, and each workshop sub-control PLC rack is parallel-connected to the temperature control wind turbine in corresponding workshop.
It is completed by PLC intelligent apparatus to each point handpiece Water Chilling Units water system flow control of whole system and the temperature control wind turbine of corresponding position
Start-up and shut-down control, complete the adjustment of self-adaptive temperature, realize that intelligence because needing to supply, makes full use of the conversion of energy consumption in system, carries
High energy consumption utilization rate, effectively reduces the waste of intermediate link energy consumption, and each workshop sub-control PLC rack is parallel-connected to the temperature in corresponding workshop
Wind turbine is controlled, realizes the start-up and shut-down control to each temperature control wind turbine in point workshop, temperature control effect is directly efficient, saves energy consumption.
In the embodiment, multi-functional multilist, on-load switch, chilled water pump frequency conversion are provided on the handpiece Water Chilling Units switch board
Soft of device, chilled water pump, constant pressure supply water automatic control system, handpiece Water Chilling Units remote control system, wherein on-load switch, chilled water
Soft of pump frequency conversion device, chilled water pump, constant pressure supply water automatic control system are series in water lines, and in parallel with multi-functional multilist,
Handpiece Water Chilling Units remote control system connects the control module of handpiece Water Chilling Units switch board by optical cable and realizes remote operation, and control is cold
Water dispenser group, chilled water pump, small pump manual automatic running.Using the chilled water pump structure of soft, relatively straight, be gradually to increase
Rated speed is added to, smaller to the impact of pump, the service life of system equipment is longer, and operation is more stable, efficiently.
In the embodiment, in the master control PLC control cabinet comprising master control S7-1200PLC, Ethernet switch, signal every
From device, touch screen, master control S7-1200PLC is connected to signal isolator and touch screen by communication line.Master control PLC control cabinet
It is the core of whole system, PLC passes through all compositions in communications protocol and signal point-to-point control system in the switch board
Part.
In the embodiment, the master control PLC control cabinet includes PLC central control systems, distribution system, pump variable frequency system
System, automatic constant pressure water charging system, display screen, upper computer control system, tele-control system, air-cooled screw water chiller-heater unit, stream
Amount calculates bypass system and divides workshop PLC control cabinet group, the distribution system, pump variable frequency system, automatic constant pressure water charging system,
Display screen, upper computer control system, tele-control system, air-cooled screw water chiller-heater unit, flow rate calculation bypath system and divide vehicle
Between PLC control cabinet group be connected in parallel to PLC central control systems respectively, wherein, distribution system passes through network communication or analog acquisition
And controller control PLC central control systems, variable frequency control system of water pumps, air-cooled screw water chiller-heater unit pass through network communication mode
PLC central control systems are connected, automatic constant pressure water charging system, flow rate calculation bypass system pass through analog quantity and communication connection PLC
Central control system divides workshop PLC control cabinet group to connect PLC central control systems, display screen and upper by fiber optic communication pattern
Position machine control system is connected to PLC central control systems by optical fiber, and wherein upper computer control system is coupled by network communication
Tele-control system and cell phone application, connect herein, preferably 4G connection modes.Network communication and analog quantity are all 485 communication moulds
Formula.
In the embodiment, the air-cooled screw water chiller-heater unit includes and each air-cooled spiral shell of PLC central control systems parallel connection
Bar water chiller/heater.
In the embodiment, each workshop PLC control cabinet respectively with display screen system, room temperature detector, water volume control device
Connection, the display screen system connect simultaneously with room temperature detector, water volume control device, and the display screen system is connected by line
Pattern and the connection of corresponding workshop PLC control cabinet are connect, room temperature detector, water volume control device pass through analog quantity pattern and correspondence
The connection of workshop PLC control cabinet.
In the embodiment, the workshop sub-control PLC rack is located in each workshop, mainly includes sub-control S7-200SMART
PLC, SMART LINE touch screens, photoelectric converter, signal isolator, sub-control S7-200SMARTPLC respectively with SMART LINE
Touch screen, photoelectric converter, signal isolator are connected by communication cable.The system is mainly used for controlling the execution machine in workshop
Structure and signal detection, and data can be exchanged with master control PLC.
Master control system leads to comprising switch board and power cabinet.Communication between switch board and power cabinet is used based on RS485
The MODBUS communications of network.Mainly include PLC, touch screen, industrial switch, signal isolator and all kinds of low pressure in switch board
Component.
In the embodiment, the system main hardware software function, integrated Ethernet interface.
The control planning schematic diagram of the system, master control device are PLC central control systems,
The institute that switch board can be completed listed by all technologies requirements above by communication and input/output signal is functional, mainly
Function is as follows：The operating status of monitoring handpiece Water Chilling Units, operating parameter, malfunction, hand/automatic mode, and carry out long-range start and stop
Control, energy hole.
According to each branch of each workshop be independently switched on requirement, freeze water supply/return main confession/return water temperature, refrigeration station
Total water supply flow, calculate refrigeration duty, determined to open air-cooled screw module board number and corresponding water according to the variation of refrigeration duty
Pump, and the number of units and ratio series inside every air-cooled screw module machine can be controlled, handpiece Water Chilling Units is made to be operated in optimum state, from
And up to energy-efficient purpose.
According to the corresponding water pump of unit operation number of units start and stop and corresponding chain and linkage is carried out, while automatically adjusts water pump electricity
Machine rotating speed, so as to reach energy-efficient purpose.
Equipment is effectively protected：Display system operating status and major parameter；Automatic record and print system number
According to according to requirement preservation history data；Reasonable team control makes system more comfortable, avoids being subcooled, it is easier to reach design
It is required that.
Unit is by each equipment, boot sequence is smoothly started according to the requirement of air-conditioner control system：Branch ratio in workshop
Valve --- chilled water pump --- handpiece Water Chilling Units；Shutdown sequence is：Handpiece Water Chilling Units --- chilled water pump --- branch ratio in workshop
Valve.
The data such as the voltage of unit, total current, total electricity consumption monitor and preserve, energy in real time by procotol
Power consumption in every time is counted at any time.
Start chilled water pump and corresponding electric butterfly valve, and judge whether chilled water flow is established, if do not established, control system
System judges that the chilled water pump breaks down, and the operation for stopping failure water pump is simultaneously emitted by fault alarm, and start automatically spare
Chilled water pump.
Water pump in the system is operated by following examples, and such as three water pumps are controlled using dual-purpose one for mode, only
During with a handpiece Water Chilling Units, remaining two water pump enables, and enabling will take turns starting with spare according to certain time, two units
When starting simultaneously, corresponding two water pumps enable, and one spare, and enabling will in turn be opened with spare water pump according to the regular hour
Dynamic, enabling can sets itself on interface with the rotation time of reserve pump.
For every chilled water pump using independent Frequency Converter Control, the operation of frequency converter and fault-signal should be with air-cooled screw machines
The chain linkage of group, the related data of frequency converter are collected by communication line in control system.
According to the requirement of the minimum discharge of air-cooled screw unit and workshop cold needs, by for electronic between return water main pipe
Proportional differential pressure by-passing valve automatic adjustment water system supplies the pressure difference of return main, stablizes system, and reach energy saving purpose.
Outdoor environment humiture is acquired using a Temperature Humidity Sensor.According to temperature in collected temperature value and workshop
Degree, setting value are compared, and judge whether air-cooled screw unit starts.
A set of temperature sensor is respectively set in workshop in subregion, and data collect control system, can be monitored in terminal
The temperature of each point, and can be according to temperature value compared with workshop set temperature value, to automatically control dynamoelectric proportion valve on each branch
Aperture.
Multifunction instrument, volometer, frequency converter, soft strater and all kinds of low pressure member devices are mainly included in power cabinet
Part.Power cabinet is controlled by communication line signal by switch board, and is had in the case where control system fails manually
Start the mechanism of water circulating pump, handpiece Water Chilling Units and constant pressure supply water pump, manual regulation button is provided on each corresponding component.
Constant pressure water compensation apparatus includes two water pump the using and the reserved, and two water pumps are replaced in turn, on constant pressure water compensation apparatus
Remote pressure gauge, automatic control system is connected to by communication line, in signal acquisition to automatic control system, low liquid level is opened
Pass is also collected in automatic control system, is required according to the level pressure for collecting remote pressure gauge signal and chilled water circuit come automatic
The start and stop of water pump are controlled, replacing construction, level pressure value can be voluntarily written by touch screen in turn, collected low liquid level signal protection water
Pump not dry running.
When dynamoelectric proportion valve is in four kinds of patterns, will it ensure to the related air-conditioning end equipment interlocking of every branch
It only just can turn on the general supply of the non-end equipment of air-conditioning after the control switch for opening dynamoelectric proportion valve, and every air-conditioning end
Equipment again can independent start and stop.
When dynamoelectric proportion valve is in control manually, dynamoelectric proportion valve is first opened to fully open position, the centre of every branch road
One air-conditioning end wind turbine is also and then automatic to be started, and the non-end equipment of other air-conditionings opening by the individual device on centralized-control box
Guard's valve separate manual controls start and stop, and has corresponding indicator light to indicate, the return air inlet installation of the non-end equipment of air-conditioning started automatically
One temperature sensor temperature and is uploaded to a point control system, while divide touching for control system in independent between automatic detection vehicle
Screen display its temperature value is touched, autonomous control system can be (independent to control with set temperature according to the temperature detected after a certain period of time
Device processed can be set) it is compared to control the open degree of the dynamoelectric proportion valve of its branch road.
When dynamoelectric proportion valve is in automatic transmission, dynamoelectric proportion valve is first opened to fully open position, the air-conditioning end of every branch
One of wind turbine is also and then automatic to be started, and the non-end equipment of other air-conditionings is by the start stop switch of the individual device on centralized-control box
Separate manual controls start and stop, and has corresponding indicator light to indicate, the return air inlet of the non-end equipment of air-conditioning started automatically installs a temperature
Sensor is spent, temperature and is uploaded to general control system between automatic detection vehicle, general control system is according to collected after a certain period of time
Temperature is compared to automatically control the open degree of the dynamoelectric proportion valve of its branch road with control room set temperature.
When dynamoelectric proportion valve is in air-supply column, dynamoelectric proportion valve is not opened at this time, is closed.And the sky in workshop
It adjusts non-end equipment can be by the control button independence start and stop of every equipment of centralized-control box, and has indicator light instruction.This situation
It is adapted to workshop and does not need to low-temperature receiver, and air-supply is only needed to take a breath.
When dynamoelectric proportion valve is in stopping column, dynamoelectric proportion valve is closed, and the non-end equipment of air-conditioning is also at stopping
State.
The system main hardware software function, integrated Ethernet interface connect and have both following performance：With wide cut AC
Or the power supply (85-264V AC or 24V DC) that DC power supply form integrates；Integrated digital amount exports 24V DC or relay；It is integrated
24V DC digital quantities input；Integrated simulation amount inputs 0-10V；Frequency is up to the pulse train output (PTO) of 100kHz；Frequency is high
Pulsewidth modulation (PWM) up to 100kHz exports；Frequency is up to the high-speed counter (HSC) of 100kHz；By connecting added communications
Module is (such as：RS 485 or RS232) realize modularization and Scalability；By signal plate directly on CPU expanded mode analog quantity
Or digital quantity signal realizes modularization and Scalability (while keeping the original spaces of CPU)；Pass through a large amount of moulds of signaling module
Analog quantity and digital quantity input and output signal realize modularization and Scalability (except CPU 1211C)；Optional memory
(SIMATIC storage cards)；PLCopen motion controls, for simple motion control；PID controller with self-setting function；Collection
Into real-time clock；Cryptoguard；Time interrupts；Hardware interrupts；Library facility；On-line/off-line diagnoses.And the hardware of above system is soft
Part function module, the terminal in all modules are all detachable.
The ratio data of analog quantity described in above-described embodiment, as water flow is opposite as the amount of description water flow
Value, and unconventional unit L or milliliter or ton etc. are easier the limitation of breakthrough conventional unit in this way, and by final effect come
The demand of water flow amount is limited, more directly in place, and convenient for detection.
In above-described embodiment, the temperature control region in preferably five regions but the temperature control region for being not limited to quantity can be according to reality
The quantity of required control area carries out system quantity adjustment, using suitable solution effect as final purpose, reaches control effect.
In addition to above preferred embodiment, the present invention also has other embodiments, and those skilled in the art can be according to this
Invention makes various changes and modifications, and without departing from the spirit of the present invention, should all belong to appended claims of the present invention and determine
The range of justice.
Claims (7)
1. central air conditioning water system variable-flow active energy-saving self-controlling system, it is characterised in that：It is described including total system switch board
Total system switch board includes handpiece Water Chilling Units switch board, master control PLC rack and workshop sub-control PLC rack, handpiece Water Chilling Units switch board and total
Control PLC rack is connected via cable, and master control PLC rack connects each workshop sub-control PLC rack by cable, and each workshop sub-control PLC rack is in parallel
It is connected to the temperature control wind turbine in corresponding workshop.
2. central air conditioning water system variable-flow active energy-saving self-controlling system according to claim 1, it is characterised in that：It is described
Multi-functional multilist, on-load switch, chilled water pump frequency converter, soft of chilled water pump, level pressure is provided on handpiece Water Chilling Units switch board to mend
Water automatic control system, handpiece Water Chilling Units remote control system, wherein on-load switch, chilled water pump frequency converter, soft of chilled water pump,
Constant pressure supply water automatic control system is series in water lines, and in parallel with multi-functional multilist, and handpiece Water Chilling Units remote control system is led to
It crosses the control module of optical cable connection handpiece Water Chilling Units switch board and realizes remote operation, for controlling handpiece Water Chilling Units, chilled water pump, benefit
The manual automatic running of water pump.
3. central air conditioning water system variable-flow active energy-saving self-controlling system according to claim 1, it is characterised in that：It is described
Master control S7-1200PLC, Ethernet switch, signal isolator, touch screen, master control S7- are equipped in master control PLC control cabinet
1200PLC is connected to signal isolator and touch screen by communication line.
4. central air conditioning water system variable-flow active energy-saving self-controlling system according to claim 1, it is characterised in that：It is described
Master control PLC control cabinet includes PLC central control systems, distribution system, pump variable frequency system, automatic constant pressure water charging system, display
Screen, upper computer control system, tele-control system, air-cooled screw water chiller-heater unit, flow rate calculation bypass system and divide workshop PLC
Switch board group, it is the distribution system, pump variable frequency system, automatic constant pressure water charging system, display screen, upper computer control system, remote
Process control system, air-cooled screw water chiller-heater unit, flow rate calculation bypath system and a point workshop PLC control cabinet group are connected in parallel to respectively
PLC central control systems, wherein, distribution system passes through network communication or analog acquisition and controller control PLC centers control system
System, variable frequency control system of water pumps, air-cooled screw water chiller-heater unit connect PLC central control systems by network communication mode, from
Dynamic constant pressure supply water system, flow rate calculation bypass system divide workshop PLC by analog quantity and communication connection PLC central control systems
Switch board group connects PLC central control systems by fiber optic communication pattern, and display screen and upper computer control system are connected by optical fiber
PLC central control systems are connected to, wherein upper computer control system couples tele-control system and cell phone application by network communication,
It connects herein, preferably 4G connection modes.
5. central air conditioning water system variable-flow active energy-saving self-controlling system according to claim 4, it is characterised in that：It is described
Air-cooled screw water chiller-heater unit includes and each air-cooled screw water chiller/heater of PLC central control systems parallel connection.
6. central air conditioning water system variable-flow active energy-saving self-controlling system according to claim 4, it is characterised in that：Each vehicle
Between sub-control PLC control cabinet respectively with display screen system, room temperature detector, water volume control device connection, the display screen system
It is connected simultaneously with room temperature detector, water volume control device, the display screen system passes through line connection mode and corresponding workshop
PLC control cabinet couples, and room temperature detector, water volume control device are joined by analog quantity pattern and corresponding workshop PLC control cabinet
It connects.
7. central air conditioning water system variable-flow active energy-saving self-controlling system according to claim 4, it is characterised in that：It is described
Workshop sub-control PLC rack is located in each workshop, is mainly provided with sub-control S7-200SMARTPLC, SMART LINE touch screens, light
Electric transducer, signal isolator, sub-control S7-200SMARTPLC respectively with SMART LINE touch screens, photoelectric converter, signal
Isolator is connected by communication cable.
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| CN108168043B (en) | 2024-10-15 |
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