CN106642535B - A kind of cold station control system of central air-conditioning and control method - Google Patents
A kind of cold station control system of central air-conditioning and control method Download PDFInfo
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- CN106642535B CN106642535B CN201611030818.3A CN201611030818A CN106642535B CN 106642535 B CN106642535 B CN 106642535B CN 201611030818 A CN201611030818 A CN 201611030818A CN 106642535 B CN106642535 B CN 106642535B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/70—Control systems characterised by their outputs; Constructional details thereof
- F24F11/80—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air
- F24F11/83—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers
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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
- F24F2110/00—Control inputs relating to air properties
- F24F2110/10—Temperature
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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
- F24F11/70—Control systems characterised by their outputs; Constructional details thereof
- F24F11/80—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air
- F24F11/83—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers
- F24F11/84—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers using valves
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- Life Sciences & Earth Sciences (AREA)
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- Fuzzy Systems (AREA)
- Mathematical Physics (AREA)
- Signal Processing (AREA)
- Air Conditioning Control Device (AREA)
Abstract
The present invention provides a kind of cold station control system of central air-conditioning and control methods, wherein includes cooling tower module, cooling pump module, cold module and freezing pump module in the control system；The cooling tower module, cooling pump module, cold module and freezing pump module respectively include at least one cooling tower, at least one cooling pump, at least one cold and at least one refrigerating water pump；The cooling tower module, cooling pump module, cold module and freezing pump module are controlled by corresponding cooling tower module controller, cooling pump module controller, cold module controller and refrigerating water pump module controller respectively；The cooling tower module controller is also connected with the total tube controller of cooling, and the cold module controller is also connected with the total tube controller of freezing.The cold station control system of central air-conditioning provided by the invention and control method can be directed to different system form and number of devices, simplify the development process of system, and improve the operational efficiency at the cold station of central air-conditioning.
Description
Technical field
The present invention relates to technical field of automatic control, in particular to a kind of cold station control system of central air-conditioning and
Control method.
Background technique
The cold station of central air-conditioning for public building provides air conditioning water, generally by cold, refrigerating water pump, cooling pump, cooling tower,
The composition such as valve, automatic control system.The cold station automatic control system of central air-conditioning can be realized to be managed and controlled automatically, can be substantially
It is horizontal to improve cold station automatic, reduces management manpower and material resources investment, it is horizontal to promote central air conditioner system efficiency.
Referring to Fig. 1, the existing cold station automatic control system of central air-conditioning mainly has following characteristics:
1) DDC controller is (cold, cooling pump, cooling tower, electric control valve, cold by a large amount of I/O interfaces and field device
Freeze pump etc.) it is connected, various measured values and executing agency's status feedback information are collected, are delivered to host computer, and by PC control
Instruction output is handed down to each executing agency.
2) host computer is connected by bus or network communication with DDC controller, generally by each DDC by various measured values with
The status feedback information of each executing agency is sent to host computer, calculated by host computer by the information unification optimization to all DDC,
Coordinated control, and the control command of generation is sent to each DDC.
Conventional central air-conditioning plant control system is primarily present following problems:
1) in the process of development, since the system form of each project, number of devices are different, to need to each
Project carries out order form exploitation.In water system form, in fact it could happen that following typical case: a. refrigerating water pump, cooling pump, cold are first
Respectively after parallel connection in groups, cold group is connected in series with freezing pump group, cooling pump group again；B. cold and refrigerating water pump, cooling pump are first gone here and there
After connection, different cold are connected in parallel again；C. according to the size of cooling capacity, cold and its corresponding refrigerating water pump, cooling pump are divided into two
Group, such as: cold 1~3 is High cooling power, cold 4~5 is small cooling capacity, at runtime can according to practical refrigeration duty demand size into
The collocation of row size cold；D. secondary pumping system.For each situation, since water system form, number of devices are all different, need
Control program is developed again for each case.This development scheme period is long, and investment manpower is more, is not suitable with big rule
The demand of mould exploitation.
2) the control mode energy-saving effect of conventional central air-conditioning plant control system is bad.Different control mode (such as
Cold unit number control, water pump unit number control, cooling water inflow control etc.) cold for central air-conditioning station efficiency level influence it is very big.
Conventional central air-conditioning plant control system typically only realizes the functions such as the basic start and stop of equipment, protection, monitoring, saves without focusing on
It can control, so that the cold station overall operation efficiency of central air-conditioning is lower.
Summary of the invention
The embodiment of the invention provides a kind of cold station control system of central air-conditioning and control methods, can be for different
System form and number of devices, simplify the development process of system, and improve the operational efficiency at the cold station of central air-conditioning.
To achieve the above object, on the one hand the embodiment of the present invention provides a kind of cold station control system of central air-conditioning, the control
It include cooling tower module, cooling pump module, cold module and freezing pump module in system processed；Include in the cooling tower module
At least one cooling tower includes at least one cooling pump in the cooling pump module, includes at least one in the cold module
Cold includes at least one refrigerating water pump in the freezing pump module；The cooling tower module, cooling pump module, cold module with
And freezing pump module respectively by corresponding cooling tower module controller, cooling pump module controller, cold module controller and
The control of refrigerating water pump module controller；The cooling tower module controller, cooling pump module controller, cold module controller and
Refrigerating water pump module controller is sequentially connected；The cooling tower module controller is also connected with the total tube controller of cooling, the cold
Module controller is also connected with the total tube controller of freezing.
Further, the cold module controller includes: unit number control unit, for controlling in the cold module
Machine is added to operate or subtract machine operation；Water temperature control unit is freezed, the freezing supply water temperature for controlling the cold module is set
Definite value；Chilled-water flow changing value determination unit, when adding machine operation for being generated in the cold module or subtract machine operation, really
The chilled-water flow changing value of the fixed cold module；Data transmission unit, for sending the chilled-water flow changing value
To the refrigerating water pump module controller.
Further, the refrigerating water pump module controller includes: data receipt unit, for receiving the cold module control
The chilled-water flow changing value that device processed is sent；Refrigerating water pump adjustment unit, for adjusting institute according to the chilled-water flow changing value
The quantity of refrigerating water pump in freezing pump module is stated, so that current desired cold of the quantity of refrigerating water pump adjusted and the cold module
Freeze water flow to be adapted.
Further, the cold module controller includes: unit number control unit, for controlling in the cold module
Machine is added to operate or subtract machine operation；Cooling water flow changing value determination unit adds machine operation for generating in the cold module
Or when subtracting machine operation, determine the cooling water flow changing value of the cold module；Data transmission unit is used for the cooling water
Flow volume change values are sent to the cooling pump module controller.
Further, the cooling pump module controller includes: data receipt unit, for receiving the cold module control
The cooling water flow changing value that device processed is sent；Cooling pump adjustment unit, for adjusting institute according to the cooling water flow changing value
The quantity of cooling pump in cooling pump module is stated, so that current desired cold of the quantity of cooling pump adjusted and the cold module
But water flow is adapted.
Further, the cooling pump module controller is used for the cooling water flow value that the cold module is current desired
It is transmitted at the cooling tower module controller；Correspondingly, the cooling tower module controller is for described cold based on the received
The current desired cooling water flow value of machine module, adjusts the quantity of cooling tower in the cooling tower module, so that adjusted cold
But the quantity of the tower cooling water flow value current desired with the cold module is adapted.
Further, the total tube controller of freezing includes: refrigerating capacity determination unit, current for measuring freezing supply mains
Refrigerating capacity or prediction freezing supply mains predetermined time refrigerating capacity and by the refrigerating capacity of measurement or the refrigerating capacity of prediction
It is sent to the cold module controller；Pressure difference temperature difference determination unit, for measuring freezing for the pressure difference or temperature of return main
Difference, and the pressure difference of measurement or the temperature difference are sent to the cooling pump module controller；Valve opening control unit is bypassed, root is used for
Pressure difference according to the freezing of measurement for return main, the bypass valve opening of control freezing supply mains, to control the pressure for return main
Difference.
Further, the total tube controller of the cooling includes: temperature detecting unit, for measuring in the cooling tower module
The outlet temperature of each cooling tower, and the bypass valve opening of cooling supply mains is controlled, so that each cold in the cold module
The cooling water inlet temperature of machine is higher than the preset temperature upper limit；Parameter provides unit, for mentioning to the cooling pump module controller
For optimal cooling water inflow or cooling water for the mean temperature of return water.
Further, the freezing pump module includes freezing level-one pump module and freezing second level pump module, wherein described cold
Freeze level-one pump module to be controlled by freezing primary pump module controller, the freezing second level pump module is controlled by freezing second level pump module
Device control；The freezing primary pump module controller is connected with the cold module controller, the freezing second level pump module control
Device processed is connected with the total tube controller of freezing.
To achieve the above object, on the other hand the embodiment of the present invention provides a kind of control method, and the control method includes:
Generate in cold module controller detection cold module plus machine operation subtracts machine operation, generation plus machine in the cold module
When operating or subtracting machine operation, the chilled-water flow changing value and cooling water flow changing value of the cold module are determined, and by institute
It states chilled-water flow changing value and cooling water flow changing value is respectively sent to refrigerating water pump module controller and cooling pump module control
Device processed；The refrigerating water pump module controller freezes the number of refrigerating water pump in pump module according to the chilled-water flow changing value, adjustment
Amount, so that the quantity of the refrigerating water pump adjusted chilled-water flow current desired with the cold module is adapted；The cooling
Pump module controller adjusts the quantity of cooling pump in cooling pump module according to the cooling water flow changing value, so that after adjustment
The quantity cooling water flow current desired with the cold module of cooling pump be adapted；The cooling pump module controller will
The current desired cooling water flow value of the cold module is transmitted at cooling tower module controller；The cooling tower module control
The device current desired cooling water flow value of the cold module based on the received adjusts the quantity of cooling tower in cooling tower module,
So that the quantity of the cooling tower adjusted cooling water flow value current desired with the cold module is adapted.
Therefore using cold group, cooling pump group, freezing pump group and cooling tower group as each in the embodiment of the present invention
Integral module, with the variation of system form and number of devices, it is only necessary to change the connection type and modules of modules
The quantity of interior equipment, can adapt in different item development environments, considerably reduce input in project development process
Man power and material.Modules can be controlled by respective controller, so as to according to the actual situation, optimize each
The quantity of equipment in module, and by the information exchange between each controller, synergistically whole system can be adjusted
It is whole, to improve the efficiency of the cold station operation of central air-conditioning.
Detailed description of the invention
The attached drawing constituted part of this application is used to provide further understanding of the present invention, schematic reality of the invention
It applies example and its explanation is used to explain the present invention, do not constitute improper limitations of the present invention.In the accompanying drawings:
Fig. 1 is the connection figure of the cold station control system of central air-conditioning in the prior art；
A kind of Fig. 2 frame diagram of the cold station control system of central air-conditioning provided by the embodiments of the present application；
Fig. 3 is a kind of frame diagram for the cold station control system of central air-conditioning that another embodiment of the application provides；
Fig. 4 is the connection figure of control system in the present embodiment；
Fig. 5 is a kind of frame diagram for the cold station control system of central air-conditioning that another embodiment of the application provides；
Fig. 6 is the connection figure of control system in the present embodiment；
Fig. 7 is a kind of frame diagram for the cold station control system of central air-conditioning that another embodiment of the application provides；
Fig. 8 is the connection figure of control system in the present embodiment；
Fig. 9 is a kind of flow chart of control method provided by the embodiments of the present application.
Specific embodiment
In order to make those skilled in the art better understand the technical solutions in the application, below in conjunction with the application reality
The attached drawing in example is applied, the technical scheme in the embodiment of the application is clearly and completely described, it is clear that described implementation
Example is merely a part but not all of the embodiments of the present application.Based on the embodiment in the application, this field is common
The application protection all should belong in technical staff's all other embodiment obtained without making creative work
Range.
The embodiment of the present application provides a kind of cold station control system of central air-conditioning.Referring to Fig. 1, the control system can wrap
Include cooling tower module, cooling pump module, cold module and freezing pump module.It wherein, include at least in the cooling tower module
One cooling tower includes at least one cooling pump in the cooling pump module, includes at least one cold in the cold module,
It include at least one refrigerating water pump in the freezing pump module.
In the present embodiment, the cooling tower module, cooling pump module, cold module and freezing pump module are respectively by phase
Cooling tower module controller, cooling pump module controller, cold module controller and the control of refrigerating water pump module controller answered.
The cooling tower module controller, cooling pump module controller, cold module controller and refrigerating water pump module controller are successively
It is connected.The cooling tower module controller is also connected with the total tube controller of cooling, and the cold module controller is also total with freezing
Tube controller is connected.
In the embodiment of the present application, the cold module controller may include:
Unit number control unit, for controlling the operation of in the cold module plus machine or subtracting machine operation；
Water temperature control unit is freezed, for controlling the freezing supply water temperature setting value of the cold module；
Chilled-water flow changing value determination unit is operated for generating to add machine operation or subtract machine in the cold module
When, determine the chilled-water flow changing value of the cold module；
Data transmission unit, for the chilled-water flow changing value to be sent to the refrigerating water pump module controller.
In the embodiment of the present application, the refrigerating water pump module controller includes:
Data receipt unit, the chilled-water flow changing value sent for receiving the cold module controller；
Refrigerating water pump adjustment unit, for adjusting and being freezed in the freezing pump module according to the chilled-water flow changing value
The quantity of pump, so that the quantity of the refrigerating water pump adjusted chilled-water flow current desired with the cold module is adapted.
In the embodiment of the present application, the cold module controller includes:
Unit number control unit, for controlling the operation of in the cold module plus machine or subtracting machine operation；
Cooling water flow changing value determination unit is operated for generating to add machine operation or subtract machine in the cold module
When, determine the cooling water flow changing value of the cold module；
Data transmission unit, for the cooling water flow changing value to be sent to the cooling pump module controller.
In the embodiment of the present application, the cooling pump module controller includes:
Data receipt unit, the cooling water flow changing value sent for receiving the cold module controller；
Cooling pump adjustment unit, it is cooling in the cooling pump module for adjusting according to the cooling water flow changing value
The quantity of pump, so that the quantity of the cooling pump adjusted cooling water flow current desired with the cold module is adapted.
In the embodiment of the present application, the cooling pump module controller is used for the cooling that the cold module is current desired
Water flow value is transmitted at the cooling tower module controller；
Correspondingly, the cooling tower module controller is for the current desired cooling water of the cold module based on the received
Flow value adjusts the quantity of cooling tower in the cooling tower module, so that the quantity of cooling tower adjusted and the cold mould
The current desired cooling water flow value of block is adapted.
In the embodiment of the present application, the total tube controller of freezing includes:
Refrigerating capacity determination unit, for measuring the current refrigerating capacity of freezing supply mains or prediction freezing supply mains default
The refrigerating capacity of the refrigerating capacity of measurement or prediction is simultaneously sent to the cold module controller by the refrigerating capacity at moment, using as cold
The foundation of machine unit number control, refrigerating water pump number of units and frequency control；
Pressure difference temperature difference determination unit, for measuring freezing for the pressure difference or the temperature difference of return main, and by the pressure difference of measurement
Or the temperature difference is sent to the cooling pump module controller, the foundation as freezing pump module frequency control；
Valve opening control unit is bypassed, the pressure difference for the freezing according to measurement for return main, control freezing supply mains
Bypass valve opening, with control for return main pressure difference.
In the embodiment of the present application, the total tube controller of the cooling includes:
Temperature detecting unit for measuring the outlet temperature of each cooling tower in the cooling tower module, and controls cooling
The bypass valve opening of supply mains, so that the cooling water inlet temperature of each cold is higher than on preset temperature in the cold module
Limit；
Parameter provides unit, supplies for providing optimal cooling water inflow or cooling water to the cooling pump module controller
The mean temperature of return water, the foundation as cooling pump module frequency conversion.
Specifically.When cooling water inflow improves (or cooling water supply and return water riser is low), cold power is reduced, and cools down
Pump is improved with cooling tower power；When cooling water inflow reduces (or cooling water supply and return water riser is high), cold power is improved, and
Cooling pump and cooling tower power reduce.Accordingly, there exist optimal cooling water inflow or cooling water supply and return water risers, so that cold
Machine, cooling pump, cooling tower general power are minimum.Cooling supply mains's controller it is recordable at different conditions (such as: different chamber's outer gas
As parameter, cold open number of units, cooling tower opens number of units etc.), different cooling water inflows or cooling water supply and return water riser it is cold
Total energy of standing effect (cold station can imitate calculating and include at least cold module and its corresponding cooling pump module, cooling tower module), and
Optimizing in historical data base finds optimal cooling water inflow or cooling water supply and return water riser, so that cold station can imitate highest.
In practical application scene, for different device structures, the optimum state of every equipment work also tends to difference.
For example, cold group centrifugal for frequency conversion, existing makes Energy Efficiency Ratio reach highest rate of load condensate, usually 50% to 80%.For
The cold module of the centrifugal cold group parallel connection of more frequency conversions, under the overall refrigerating effect demand that outside provides, module controller can
According to performance curve, optimal operation number of units is found, so that every unit is operated in close under optimal rate of load condensate.
For variable frequency pump, existing makes pump efficiency reach highest water flow.For the water of more variable frequency pump parallel connections
Pump module (cooling pump module and freezing pump module), under given total (pumping) head and total flow demand, module controller can root
According to performance curve, optimal operation number of units is found, so that every water pump operation is close under optimal water flow.
For the cooling tower module of more frequency conversion cooling tower parallel connections, under given total flow demand, module controller
It should make each cooling tower under the premise of being higher than cooling water flow lower limit, as far as possible more unlatching cooling tower number of units, to utilize as far as possible
The heat exchange area of cooling tower.
In addition, in practical application scene, cooling tower module, cooling pump module, cold module and freezing pump module it
Between may exist a variety of different connection types.Referring to Fig. 3, cold 1 is corresponding to refrigerating water pump 4 with refrigerating water pump 1 respectively to cold 4
Connection, cooling pump 1 to cooling pump 4 is also correspondingly connected with cold 1 to cold 4 respectively, cooling tower 1 to cooling tower 4 also respectively with it is cold
But pump 1 to cooling pump 4 is correspondingly connected with.That is, being all pair in the system structure, between the autonomous device in modules
It should connect.The frame diagram of the module controller of modules can be as shown in Figure 4.In the system structure, there may be more
The total tube controller of a cooling, cooling tower module controller, cooling pump module controller and refrigerating water pump module controller.
Referring to Fig. 5, cold 1 to 3 is associated with refrigerating water pump 1 to 3, cold 4 to 5 is associated with refrigerating water pump 4 to 5.In addition,
Cold 1 to 3 is also connected with refrigerating water pump 1 to 3, and cold 4 to 5 is also connected with refrigerating water pump 4 to 5.Cooling tower 1 to 5 respectively with cooling pump 1
It is connected to 3 and cooling pump 4 to 5.In the system architecture, cold 1 to 3 can be considered as cold module 1, and cold 4 to 5 can regard
For cold module 2, refrigerating water pump 1 to 3 can be considered as freezing pump module 1, and refrigerating water pump 4 to 5 can be considered as freezing pump module 2, wherein
Each module can correspond to a module controller.In this way, the frame diagram of the module controller of the system architecture can be such as Fig. 6
It is shown.
In the embodiment of the present application, the freezing pump module can also include freezing level-one pump module and freezing two stage pump mould
Block, wherein the freezing level-one pump module is controlled by freezing primary pump module controller, and the freezing second level pump module is by freezing
The control of two stage pump module controller；The freezing primary pump module controller is connected with the cold module controller, described cold
Freeze two stage pump module controller to be connected with the total tube controller of freezing.
Specifically, Fig. 7 and Fig. 8 are please referred to, freezing pump module can be divided into 4 freezing primary pumps and 4 freezing two stage pumps,
Each freezing primary pump can be used as an independent module, and every two freezing two stage pump can be used as an independent module.
In this way, what is be connected with the cold module can be 4 freezing level-one pump modules, and it can be 2 with what the water segregator was connected
A freezing second level pump module.Each module can be controlled by corresponding module controller, to constitute module as shown in Figure 8
The frame diagram of controller.
Since the effect of the total tube controller of cooling is to determine cooling line cooling water inflow or cooling water supply and return water riser,
Its quantity is also the quantity decision of cooling tower module by cooling down the quantity of general pipeline.When each cooling tower parallel connection becomes one
When cooling tower module, only one cooling general pipeline (including for return pipe road), only with cooling supply mains's controller, such as Fig. 2
With shown in Fig. 6.When each cooling tower is mutually not attached to, then respectively there is a cooling general pipeline, then each cooling tower respectively uses one
Cooling total tube controller, as shown in Figure 4.
It is each to freeze two stage pump module controller and freeze total tube controller phase for freezing the water system form of two stage pump
Even.Each branch least favorable end supply backwater pressure difference signal is measured by freezing total tube controller, is delivered to each freezing two respectively
Grade pump module adjusts the foundation of frequency as each freezing second level pump module.
Referring to Fig. 9, the embodiment of the present application also provides a kind of control method, the control method includes:
S1: generate in cold module controller detection cold module plus machine operation subtracts machine operation, in the cold mould
When generation plus machine operate or subtract machine operation in block, determine that the chilled-water flow changing value of the cold module and cooling water flow become
Change value, and the chilled-water flow changing value and cooling water flow changing value are respectively sent to refrigerating water pump module controller and cold
But pump module controller；
S2: according to the chilled-water flow changing value, adjustment freezes to be freezed the refrigerating water pump module controller in pump module
The quantity of pump, so that the quantity of the refrigerating water pump adjusted chilled-water flow current desired with the cold module is adapted；
S3: the cooling pump module controller adjusts cooling in cooling pump module according to the cooling water flow changing value
The quantity of pump, so that the quantity of the cooling pump adjusted cooling water flow current desired with the cold module is adapted；
S4: the current desired cooling water flow value of the cold module is transmitted to cooling by the cooling pump module controller
At tower module controller；
S5: the cooling tower module controller current desired cooling water flow value of the cold module based on the received,
The quantity of cooling tower in cooling tower module is adjusted, so that the quantity of cooling tower adjusted and the cold module are current desired
Cooling water flow value is adapted.
In the embodiment of the present application, the method also includes:
The current refrigerating capacity of total tube controller measurement freezing supply mains or prediction freezing supply mains are freezed in predetermined time
Refrigerating capacity and the refrigerating capacity of the refrigerating capacity of measurement or prediction is sent to the cold module controller；
The freezing total tube controller measurement freezing for return main pressure difference perhaps the temperature difference and by the pressure difference of measurement or
The temperature difference is sent to the cooling pump module controller；
Pressure difference of the total tube controller of freezing according to the freezing of measurement for return main, the bypass of control freezing supply mains
Valve opening, to balance the front and back hydraulic pressure of inlet valve.
In the embodiment of the present application, the method also includes:
Cooling total tube controller measures the outlet temperature of each cooling tower in the cooling tower module, and it is total to control cooling water
The bypass valve opening of pipe, so that the cooling water inlet temperature of each cold is higher than the preset temperature upper limit in the cold module；
The total tube controller of cooling provides optimal cooling water inflow or cooling water to the cooling pump module controller
For the mean temperature of return water.
Therefore using cold group, cooling pump group, freezing pump group and cooling tower group as each in the embodiment of the present invention
Integral module, with the variation of system form and number of devices, it is only necessary to change the connection type and modules of modules
The quantity of interior equipment, can adapt in different item development environments, considerably reduce input in project development process
Man power and material.Modules can be controlled by respective controller, so as to according to the actual situation, optimize each
The quantity of equipment in module, and by the information exchange between each controller, synergistically whole system can be adjusted
It is whole, to improve the efficiency of the cold station operation of central air-conditioning.
Obviously, those skilled in the art should be understood that each module of the above-mentioned embodiment of the present invention or each step can be with
It is realized with general computing device, they can be concentrated on a single computing device, or be distributed in multiple computing devices
On composed network, optionally, they can be realized with the program code that computing device can perform, it is thus possible to by it
Store and be performed by computing device in the storage device, and in some cases, can be held with the sequence for being different from herein
The shown or described step of row, perhaps they are fabricated to each integrated circuit modules or will be multiple in them
Module or step are fabricated to single integrated circuit module to realize.In this way, the embodiment of the present invention be not limited to it is any specific hard
Part and software combine.
The foregoing is only a preferred embodiment of the present invention, is not intended to restrict the invention, for the skill of this field
For art personnel, the embodiment of the present invention can have various modifications and variations.All within the spirits and principles of the present invention, made
Any modification, equivalent substitution, improvement and etc. should all be included in the protection scope of the present invention.
Claims (10)
1. a kind of cold station control system of central air-conditioning, which is characterized in that include cooling tower module, cooling pump in the control system
Module, cold module and freezing pump module；It include at least one cooling tower, the cooling pump module in the cooling tower module
In include at least one cooling pump, include at least one cold in the cold module, including at least in the freezing pump module
One refrigerating water pump；The cooling tower module, cooling pump module, cold module and freezing pump module are respectively by corresponding cooling tower
Module controller, cooling pump module controller, cold module controller and the control of refrigerating water pump module controller；The cooling tower
Module controller, cooling pump module controller, cold module controller and refrigerating water pump module controller are sequentially connected；It is described cold
But tower module controller is also connected with the total tube controller of cooling, the cold module controller also with freeze total tube controller phase
Even.
2. control system according to claim 1, which is characterized in that the cold module controller includes:
Unit number control unit, for controlling the operation of in the cold module plus machine or subtracting machine operation；
Water temperature control unit is freezed, for controlling the freezing supply water temperature setting value of the cold module；
Chilled-water flow changing value determination unit, when adding machine operation for being generated in the cold module or subtract machine operation, really
The chilled-water flow changing value of the fixed cold module；
Data transmission unit, for the chilled-water flow changing value to be sent to the refrigerating water pump module controller.
3. control system according to claim 2, which is characterized in that the refrigerating water pump module controller includes:
Unit number control unit, for controlling the operation of in the cold module plus machine or subtracting machine operation；
Refrigerating water pump adjustment unit, for adjusting refrigerating water pump in the freezing pump module according to the chilled-water flow changing value
Quantity, so that the quantity of the refrigerating water pump adjusted chilled-water flow current desired with the cold module is adapted.
4. control system according to claim 1, which is characterized in that the cold module controller includes:
Detection unit is operated, for detecting the operation of generate in the cold module plus machine or subtracting machine operation；
Cooling water flow changing value determination unit, when adding machine operation for being generated in the cold module or subtract machine operation, really
The cooling water flow changing value of the fixed cold module；
Data transmission unit, for the cooling water flow changing value to be sent to the cooling pump module controller.
5. control system according to claim 4, which is characterized in that the cooling pump module controller includes:
Data receipt unit, the cooling water flow changing value sent for receiving the cold module controller；
Cooling pump adjustment unit, for adjusting cooling pump in the cooling pump module according to the cooling water flow changing value
Quantity, so that the quantity of the cooling pump adjusted cooling water flow current desired with the cold module is adapted.
6. control system according to claim 1, which is characterized in that the cooling pump module controller is used for will be described cold
The current desired cooling water flow value of machine module is transmitted at the cooling tower module controller；
Correspondingly, the cooling tower module controller is for the current desired cooling water flow of the cold module based on the received
Value, adjusts the quantity of cooling tower in the cooling tower module, so that the quantity of cooling tower adjusted is worked as with the cold module
Preceding required cooling water flow value is adapted.
7. control system according to claim 1, which is characterized in that the total tube controller of the freezing includes:
Refrigerating capacity determination unit, for measuring the current refrigerating capacity of freezing supply mains or prediction freezing supply mains in predetermined time
Refrigerating capacity and the refrigerating capacity of the refrigerating capacity of measurement or prediction is sent to the cold module controller；
Pressure difference temperature difference determination unit, for measure freezing for return main pressure difference perhaps the temperature difference and by the pressure difference of measurement or
The temperature difference is sent to the cooling pump module controller；
Valve opening control unit is bypassed, the pressure difference for the freezing according to measurement for return main, the side of control freezing supply mains
Port valve aperture, to control the pressure difference for return main.
8. control system according to claim 1, which is characterized in that the total tube controller of cooling includes:
Temperature detecting unit, for measuring the outlet temperature of each cooling tower in the cooling tower module, and it is total to control cooling water
The bypass valve opening of pipe, so that the cooling water inlet temperature of each cold is higher than the preset temperature upper limit in the cold module；
Parameter provides unit, for providing optimal cooling water inflow or cooling water for return water to the cooling pump module controller
Mean temperature.
9. control system according to claim 1, which is characterized in that the freezing pump module includes freezing level-one pump module
With freezing second level pump module, wherein the freezing level-one pump module is controlled by freezing primary pump module controller, the freezing two
Grade pump module is controlled by freezing two stage pump module controller；The freezing primary pump module controller and the cold module control
Device is connected, and the freezing two stage pump module controller is connected with the total tube controller of freezing.
10. the control method in a kind of cold station control system of central air-conditioning applied to as described in any in claim 1 to 9,
It is characterized in that, the control method includes:
Generate in cold module controller detection cold module plus machine operation subtracts machine operation, generates in the cold module
When machine being added to operate or subtract machine operation, the chilled-water flow changing value and cooling water flow changing value of the cold module are determined, and
The chilled-water flow changing value and cooling water flow changing value are respectively sent to refrigerating water pump module controller and cooling pump mould
Block controller；
The refrigerating water pump module controller freezes the number of refrigerating water pump in pump module according to the chilled-water flow changing value, adjustment
Amount, so that the quantity of the refrigerating water pump adjusted chilled-water flow current desired with the cold module is adapted；
The cooling pump module controller adjusts the number of cooling pump in cooling pump module according to the cooling water flow changing value
Amount, so that the quantity of the cooling pump adjusted cooling water flow current desired with the cold module is adapted；
The current desired cooling water flow value of the cold module is transmitted to cooling tower module by the cooling pump module controller
At controller；
The current desired cooling water flow value of the cold module, adjustment cool down the cooling tower module controller based on the received
The quantity of cooling tower in tower module, so that the quantity of cooling tower adjusted and the current desired cooling water flow of the cold module
Magnitude is adapted.
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| CN107514710A (en) * | 2017-09-11 | 2017-12-26 | 珠海格力电器股份有限公司 | Modular integrates cold station |
| CN110926045B (en) * | 2019-11-22 | 2020-11-13 | 珠海格力电器股份有限公司 | Water chilling unit and control method thereof |
| CN111076387B (en) * | 2019-12-05 | 2020-12-22 | 珠海格力电器股份有限公司 | Variable-frequency centrifugal unit, control method thereof, storage medium and air conditioner |
| CN111365834B (en) * | 2020-03-19 | 2021-07-13 | 上海美控智慧建筑有限公司 | Control method of air conditioning system, and computer-readable storage medium |
| CN112856722B (en) * | 2021-01-07 | 2022-07-12 | 丁一 | Cold source system control method, controller, system, storage medium and program product |
| CN114791163B (en) * | 2022-06-23 | 2022-09-06 | 蘑菇物联技术（深圳）有限公司 | Method, apparatus and medium for controlling central air conditioning system |
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Effective date of registration: 20191101 Address after: 230088 Anhui city of Hefei province high tech Zone Parkinson weir Science Park Road No. 208. Co-patentee after: GREE ELECTRIC APPLIANCES Inc. OF ZHUHAI Patentee after: GREE ELECTRIC(HEFEI) Co.,Ltd. Address before: 519070 Guangdong city of Zhuhai Province Qianshan Patentee before: GREE ELECTRIC APPLIANCES Inc. OF ZHUHAI |