CN105066341B - Suitable for the change water temperature control system of air-conditioning Primary pump system - Google Patents
Suitable for the change water temperature control system of air-conditioning Primary pump system Download PDFInfo
- Publication number
- CN105066341B CN105066341B CN201510464504.3A CN201510464504A CN105066341B CN 105066341 B CN105066341 B CN 105066341B CN 201510464504 A CN201510464504 A CN 201510464504A CN 105066341 B CN105066341 B CN 105066341B
- Authority
- CN
- China
- Prior art keywords
- cold
- water
- air
- water temperature
- pipeline
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Classifications
-
- 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
-
- 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
-
- 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
-
- 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
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F2140/00—Control inputs relating to system states
- F24F2140/20—Heat-exchange fluid temperature
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Atmospheric Sciences (AREA)
- Air Conditioning Control Device (AREA)
- Other Air-Conditioning Systems (AREA)
Abstract
The present invention provides the change water temperature control system suitable for air-conditioning Primary pump system, is related to refrigeration control field, is invented to improve accuracy and reduction energy consumption when air-conditioning system cold power and hydraulic balancing regulation.Including cold device, for/water return pipeline, air-conditioning system and balance pipeline, air-conditioning system includes the air conditioning terminal of one and the above, and air conditioning terminal is the polytype including fan coil；I and II water pump is provided with for/water return pipeline；Cold power pretreatment unit, cold output control device and two grades of variable frequency control device of water pump, the reflux ratio and cold water temperature setting value of cold power pretreatment unit calculated equilibrium pipeline, cold output control device carry out Power Control to cold device；Two grades of variable frequency control device of water pump calculate the equivalent valve seat opening value of fan coil cold water, and according to valve seat opening maximum in all air conditioning terminal cold water regulating valves in air-conditioning system, VFC is carried out to two grades of water pumps.The converter technique that the present invention can be used in air-conditioning.
Description
Technical field
The present invention relates to handpiece Water Chilling Units control field, more particularly to a kind of change water temperature control suitable for air-conditioning Primary pump system
System processed.
Background technology
At present, a part of handpiece Water Chilling Units, particularly Large Central Air Conditioning System system use one-level main frequency water pump, two grades of changes
The converter technique of frequency water pump.
This is because, as shown in figure 1, traditional one-level water pump system is as follows：Including water chilling unit system, (i.e. cold is filled
Put), one-level water pump group, supply channel and water return pipeline, wherein, supply channel includes water main 5 and is arranged in parallel supplying water
Multiple water supply pipes 2 on house steward 5, water return pipeline includes return main 6 and is arranged in parallel multiple backwater on return main 6
It is in charge of 3, water chilling unit system includes the multiple handpiece Water Chilling Units 1 being arranged in parallel, water main 5 includes water supply pipe 2, return main
6 are in charge of 3 including multiple backwater, and one-level water pump group includes the multiple water pumps 4 being arranged in parallel, the outlet pipe of water chilling unit system and one
The water inlet pipe of level water pump group is connected, and the outlet pipe of one-level water pump group is aggregated into water main 5 and is connected with water supply pipe 2, and passes through
Using backwater it is in charge of 3 after user and 3 return mains 6 collected are in charge of by backwater are back to water chilling unit system and recycles.Should
Although system system has, flow is simple, number of devices is less, cost is relatively low and the less advantage of floor space, can not be to institute
Some users accomplish to supply on demand, especially in Large Central Air Conditioning System project, except the user farthest apart from refrigerator device,
Remaining most of user relies primarily on the artificial decompression measure such as valve and obtains suitable operting differential pressure, there is larger energy consumption and wastes
Phenomenon.
On the other hand, two grades of water pump sides using variable frequency pump go for each confession/water return pipeline resistance difference compared with
Big environment, and two grades of pump heads of each confession/water return pipeline can be selected according to the resistance of corresponding confession/water return pipeline
Select, so that alleviating whole pump heads in traditional type water system all needs to show by energy waste caused by index circuit selection
As, wherein, the loop refers to be in charge of constituted water circulation path by each water supply pipe and backwater.As shown in Fig. 2 being existing
A kind of Water flow-path figure for the two grades of pump variable frequency systems having.Two grades of pump variable frequency systems include handpiece Water Chilling Units 1, with handpiece Water Chilling Units
1 corresponds and is arranged on one-level water pump 9 on its outlet pipeline, the outlet pipe of one-level water pump 9 collect after with the phase of water main 5
Even, supply channel 2 is provided with two grades of water pump groups, and two grades of water pump groups include at least two two grades of water pumps 10 being arranged in parallel, and supply
Balance pipe 11 is provided between supply mains 5 and return main 6.Wherein, one-level water pump 9 is used to overcome the water resistance in refrigerator device
Power, two grades of water pumps 10 are used to overcome cold device exterior line and the water resistance of each local loop, due to a certain extent
Accomplish the supply on demand to user, thus significantly improve energy consumption wasting phenomenon.
It is different from variable frequency pump, although the one-level main frequency water pump used within air-conditioning systems can not as two grades of variable frequency pumps that
Sample carries out Flow-rate adjustment, still, due to the few trouble point of its than two grades variable frequency pump, that is, has lacked a set of converter plant, because
This systematic function is more stablized.
In the control system for two grades of water pump systems of air-conditioning, in order to really overcome energy consumption to waste, at least need from cold
Acc power is adjusted and cold water conveys two aspects and started with, and realizes that the cold equilibrium of supply and demand and hydraulic equilibrium are most basic requirement, mesh
Before have the technologies of two aspects, one is the cold power regulation technology based on air conditioner load, and it is calculated according to the load of air-conditioning
Handpiece Water Chilling Units set value of the power, realizes that cold supply is effectively matched with air conditioner load；Two be hydraulic equilibrium two stage pump frequency conversion control
It is to be determined to set for backwater differential pressure according to the branch road heating power least favorable loop of air-conditioning system to have in technology processed, existing correlation technique a kind of
Definite value, maintains this setting value to realize, its concrete principle is so that air-conditioning system by adjusting branch's two stage pump frequency conversion rotating speed
The air conditioning terminal cold water valve seat opening in heating power least favorable loop is maintained at larger opening in branch road, by reducing cold water pipe roadlock
Power, reaches the purpose of reduction two stage pump conveying energy, and meets the burden requirement of each air conditioning terminal.
But, the air conditioning design load calculation value that above-mentioned cold power regulation technology is based on, generally according to water supply flow and confession
Backwater temperature difference calculates what is come, and its reliability is used for a long time in flow instrument and the degree of accuracy is difficult to guarantor and levied, while for air conditioner load
The supply water temperature of calculating and return water temperature are because for water return pipeline length is different, flow velocity difference is clearly present the time difference, and this time difference is
Change, factors above often destroys the accuracy of air conditioning design load calculation, so as to cause load adjustment to have deviation, supply and demand
Balance is difficult to real foundation；And above-mentioned hydraulic equilibrium two stage pump frequency conversion control technique depends on the maximum valve seat opening of air conditioning terminal,
Thus it is suitable only for the air conditioning terminal application scenario to the cold valves using stroke continuously adjustable, it is impossible to be applicable for using two-way
The air conditioning terminal of magnetic valve such as fan coil type, therefore in the fan coil air-conditioner end in face of employing two-way electromagnetic valve
When, not the problem of hydraulic equilibrium presence regulation accuracy is not good or even is difficult to regulation.
In summary, in the cold power and hydraulic balancing regulation technology of above-mentioned existing air-conditioning system, above-mentioned technology is deposited
The problem of cold power and not good hydraulic balancing regulation accuracy.
The content of the invention
In view of this, system is controlled it is an object of the invention to provide a kind of change water temperature suitable for air-conditioning Primary pump system
System, for ensuring accuracy when cold power and hydraulic balancing regulation, so that it is energy-saving, complicated answer can be applied to
Use occasion.
To achieve the above object, there is provided a kind of control system of two grades of water pump systems of air-conditioning, bag for the first aspect of the present invention
Include cold device, be connected to the cold device delivery port supply channel, be connected to the water inlet of the cold device
Water return pipeline, the air-conditioning system being arranged between the supply channel and the water return pipeline and with the air-conditioning system simultaneously
Join the balance pipeline set；
Wherein, the air-conditioning system includes one or more air conditioning terminals in parallel, and the air conditioning terminal is to include blower fan
Polytype including coil pipe, the water return pipeline, which is provided with, is used for the one-level water pump to the cold device backwater, the sky
The supply channel of adjusting system is provided with two grades of water pumps for being used for supplying water to the air-conditioning system；
The control system also includes：
Cold power pretreatment unit, for the reflux ratio of calculated equilibrium pipeline, according to the reflux ratio, is exported cold
Coolant-temperature gage setting value；
Cold output control device, the cold water temperature for being exported according to the cold power pretreatment unit is set
Value, Power Control is carried out to the cold device；
The control system also includes two grades of variable frequency control device of water pump, according to all air conditioning terminal cold water in air-conditioning system
Valve seat opening maximum in regulating valve, VFC is carried out to two grades of water pumps.
In the first possible implementation of the first aspect of the present invention, the cold power pretreatment unit bag
Include：
Cold water temperature measurement table, is arranged on the supply channel, and the cold water temperature measurement table is located at the feed pipe
Road and the upstream of the balance line connection, measure and are located at the supply channel and the balance pipeline in the supply channel
The upstream water flow temperature of junction；
Two grades of water pump cold water temperature measurement tables are gone, are arranged on the supply channel, and described remove two grades of water pump cold water temperatures
The downstream that measurement table is located at the supply channel and the balance line connection is spent, is measured described in being located in the supply channel
The downstream water flow temperature of supply channel and the balance line connection；
User's return water temperature measurement table, is arranged on the water return pipeline, and user's return water temperature measurement table is located at
The upstream of the water return pipeline and the balance line connection, measures and is located at the water return pipeline and institute in the water return pipeline
State the upstream water flow temperature of balance line connection；
Return water temperature measurement table, is arranged on the water return pipeline, and the return water temperature measurement table is located at the backwater
The downstream of pipeline and the balance line connection, measures and is located at the water return pipeline and the balance pipe in the water return pipeline
The downstream water flow temperature of road junction；
Balance pipe coolant-temperature gage measurement table, is arranged on the balance pipeline, measures the water flow temperature of the balance pipeline；
Balance pipe reflux ratio calculator, according to the cold water temperature measurement table, go two grades of water pump cold water temperature measurement tables,
The temperature that user's return water temperature measurement table, return water temperature measurement table and balance pipe coolant-temperature gage measurement table are measured respectively, is calculated
Balance pipe reflux ratio；
Cold water temperature preset value calculation device, the reflux ratio calculated according to the balance pipe reflux ratio calculator is calculated
And export cold water temperature setting value.
In second of possible implementation of the first aspect of the present invention,
The cold output control device includes：
Cold water temperature controller, according to the cold water temperature preset value calculation device export cold water temperature setting value and
Cold water temperature measured by the cold water temperature measurement table, calculates and exports the first control signal value；
Return water temperature feedforward controller, the return water temperature according to measured by the return water temperature measurement table, calculates and exports
Second control signal value；
Adder, sums to first control signal value with second control signal value, by the value after summation
As power control signal, Power Control is carried out to the cold device.
With reference to second of possible realization of the first possible or the first aspect of the present invention of the first aspect of the present invention
Mode, in the third possible implementation of the first aspect of the present invention, two grades of variable frequency control device of water pump include：
The equivalent valve seat opening computing unit of fan coil, for calculating equivalent valve seat opening value；
Maximum value signal selector, receives the equivalent valve position that the equivalent valve seat opening computing unit of fan coil is calculated
The cold valves aperture value of other air conditioning terminals in opening value, and air-conditioning system in addition to fan coil, is selected described equivalent
Valve seat opening value and the maximum in the cold valves aperture value, are used as the output of maximum value signal selector；
Cold valves valve positioner, the maximum exported according to the maximum value signal selector, to described two grades
Water pump carries out VFC.
Change water temperature control system provided in an embodiment of the present invention suitable for air-conditioning Primary pump system, due to supplying water and returning
Multiple temperature measurement equipments such as cold water temperature measurement table, return water temperature measurement table, and these temperature are respectively arranged with water lines
The water flow temperature that degree measuring apparatus is measured, is transferred to balance pipe reflux ratio calculator, for calculated equilibrium pipe reflux ratio,
So as to take full advantage of the parameter that cold water temperature, return water temperature etc. reflect air conditioner load comprehensively, this reflux ratio can be very timely
Ground reflects the balanced degree of cold power and air conditioner load, and thus ratio changes cold water temperature setting value to realize to cold power
Adjustment, cold power can be made more to be matched with load, thus with obvious energy-saving effect；On this basis by being arranged on
The equivalent valve seat opening computing unit of fan coil on fan coil calculates its equivalent valve seat opening value, so as to further solve
Two grades of water pumps are carried out variable frequency adjustment based on this, can adapt to by the measurement problem of the valve seat opening under complicated applications occasion
The service requirement of complicated applications occasion, has reached Optimum Hydraulic balance, reduces the purpose of two grades of pump energy consumptions, improves user's body
Test.
Brief description of the drawings
The schematic diagram for the air-conditioning one-level water pump system that Fig. 1 provides for prior art；
The schematic diagram for two grades of water pump systems of air-conditioning that Fig. 2 provides for prior art；
Fig. 3 is the schematic diagram of two grades of water pump systems of air-conditioning of the embodiment of the present invention；
Fig. 4 is the schematic diagram of the control system of two grades of water pump systems of air-conditioning of the embodiment of the present invention；
Fig. 5 is the schematic diagram of the cold power pretreatment unit of control system shown in Fig. 4 in systems；
Fig. 6 is the schematic diagram of the cold output control device of control system shown in Fig. 4 in systems；
Fig. 7 is the schematic diagram of two grades of variable frequency control device of water pump of the control system of the embodiment of the present invention in systems；
Fig. 8 is the schematic diagram of the two stage pump frequency-variable controller of the control system shown in Fig. 7 in systems；
Fig. 9 is the cold power pretreatment unit and the original of cold output control device of the control system of the embodiment of the present invention
Reason explanation figure；
Figure 10 is the principle explanatory diagram of two grades of variable frequency control device of water pump of the control system of the embodiment of the present invention.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Site preparation is described, it is clear that described embodiment is only a part of embodiment of the invention, rather than whole embodiments.It is based on
Embodiment in the present invention, it is every other that those of ordinary skill in the art are obtained under the premise of creative work is not made
Embodiment, belongs to the scope of protection of the invention.
First, the embodiment of the present invention provides a kind of change water temperature control system suitable for air-conditioning Primary pump system.Lead to below
Specific embodiment is crossed the control system of two grades of water pump systems of air-conditioning provided in an embodiment of the present invention is described in detail.
For the ease of understanding the present invention, the operation principle to two grades of water pump systems of air-conditioning of the present invention gives letter below
Illustrate.As shown in figure 3, two grades of water pump systems of air-conditioning are made up of a water pump system and secondary water pump system.Water pump system
System mainly includes refrigeration machine 10a, 10b, one-level chilled water pump 101a, 101b；Secondary water pump system mainly includes two grades of chilled waters
Pump 201a~201d, air conditioning terminal 20a, 20b；Water collector 30 and water knockout drum 40 belong to a water pump system and secondary water pump altogether
System, wherein, the loop refers to the water circulation path being made up of each supply channel and water return pipeline.Secondary water pump system
Typically it is made up of, is supplied water per loop by one group of chilled water pump two or more loop.As shown in figure 3, in the figure, two grades of chilled waters
Pump 201a belongs to different loops from 201d.In two grades of water pump systems of air-conditioning shown in Fig. 3, two grades of freezings in each loop
The lift of water pump can be selected according to respective loops resistance, such as two grades of chilled water pump 201a and 201d in Fig. 3 can be respectively to each
From loop select different lifts, therefore, this system is more suitable for the system that each loop resistance differs larger, so as to
Solving whole pump heads in traditional type water system all needs to waste energy problem by caused by index circuit selection.In addition,
For with conventional art identical content, repeat no more below.
Such as background technology proposed as in the one-level main frequency water pump of prior art, two grades of variable frequency pumps, based on sky
The cold power adjustment technology of load is adjusted, because air conditioner load is difficult to obtain accurate calculated value, the cold equilibrium of supply and demand is difficult to realize；
Simultaneously because it is not only relevant with cold water temperature with the cold power that air conditioner load matches, it is also close with return water temperature, flow etc.
Correlation, therefore, has very big one-sidedness according only to cold water temperature adjustment cold power, use only cold water temperature feedback control plan
Slightly, there is the weakness of the hysteresis quality of cold power adjustment, especially in treatment temperature this kind of lag time big control problem
More difficulty can be faced, thus there is the problem of technological parameter stability is poor simultaneously.And for existing two grades of hydraulic equilibrium
Pump frequency conversion control technology, due to the application scenario of its cold valves air-conditioning system for being necessarily dependent upon stroke continuously adjustable, it is impossible to
It is applicable for the fan coil cooling unit using two-way electromagnetic valve, and there is hydraulic balancing regulation reasonability and be difficult to ensure that, water
The problem of power conveying energy consumption is too high.
The cardinal principle of the embodiment of the present invention is, in the control of two grades of water pump systems of air-conditioning provided in an embodiment of the present invention
In system, according to designed balance pipe reflux ratio calculator, adjusted according to reflux ratio cold water temperature setting value and then
Implement the adjustment of cold power, effectively realize that cold power, with matching, feedovers with the balance of air conditioner load while adding return water temperature
Signal, it is possible to increase regulating the speed for cold power, compensate for the simple defect for relying on feedback control；Go forward side by side one on this basis
The equivalent aperture according to designed fan coil cold valves is walked, in face of the hybrid air-conditioning system with fan coil air-conditioner end
During system, each two grades of pump variable frequency rotating speeds of branch, Optimum Hydraulic balance, reduction are adjusted according to the valve opening in heating power least favorable loop
Cold water pipe resistance and then reduction cold water conveying energy, reach the purpose for realizing energy-conservation, enable adaptation complicated applications occasion
Service requirement.
Specifically, for the problems of above-mentioned background technology, the embodiment of the present invention provides a kind of two grades of water of air-conditioning
The control system of pumping system, as shown in figure 4, the supply channel including cold device 10, the delivery port for being connected to cold device 10
L1, the water return pipeline L2 for being connected to the water inlet of cold device 10, the sky being arranged between supply channel L1 and water return pipeline L2
The adjusting system L4 and balance pipeline L3 being arranged in parallel with the air-conditioning system L4；
Wherein, air-conditioning system L4 includes one or more air conditioning terminals 20 in parallel, and air conditioning terminal 20 is to include fan unit
Polytype including pipe；Air-conditioning system L4 supply channel is provided with the two grades of water pump Ps 20 supplied water to air conditioning terminal 20；Backwater
Being provided with pipeline L2 is used for the one-level water pump P 10 to the backwater of cold device 10；
Control system also includes：
Cold power pretreatment unit C10a, for calculated equilibrium pipeline L3 reflux ratio, according to reflux ratio, output
Cold water temperature setting value；
Cold output control device C10b, for being set according to the cold power pretreatment unit C10a cold water temperatures exported
Definite value, Power Control is carried out to cold device 10；
Control system also includes two grades of variable frequency control device of water pump C20, for calculating equivalent valve seat opening value, and according to sky
Two grades of water pumps are carried out VFC by valve seat opening maximum in the air conditioning terminal cold valves in adjusting system.
The course of work to the above embodiment of the present invention is briefly explained below.Cold device 10 is in one-level water pump P 10
Industrial frequency control under, current are supplied to supply channel L1, current flow through supply channel L1 and supplied to two grades of water pump Ps 20, with
And air-conditioning system L4, and finally flow back to cold device 10 via water return pipeline L2.Here, current by supply channel supply and by
During water return pipeline is returned, when cold water supplies water with demand imbalance, current can flow through balance pipeline L3, and the present invention is implemented
Example is calculated the reflux ratio for balancing pipeline L3 by cold power pretreatment unit C10a, and according to result of calculation,
Power Control is carried out to cold device 10.In addition, two grades of variable frequency control device of water pump C20 of the embodiment of the present invention, can be to air-conditioning
The simulation that each fan coil air-conditioner end 20 in system L4 carries out valve seat opening is calculated, and is obtained equivalent to other types air-conditioning end
The equivalent valve seat opening value of the cold valves aperture at end 20, so that according to air conditioning terminal cold valves position opening value in air-conditioning system L4,
VFC is carried out to two grades of water pump Ps 20.
Here, it is necessary to which explanation, cold water temperature realized by adjusting cold power, only when cold power with
When air conditioner load matches, cold water temperature can just be stablized, and the change of cold-water return temperature is reflection air conditioning terminal load variations
Direct Variable, in this embodiment of the invention, due to the feed forward variable further adjusted with return water temperature as power, greatly
The big promptness for improving the adjustment of cold power, cold water temperature can effectively stablize cold using Multivariable Feedforward feedback control strategy
Coolant-temperature gage, meets requirement of the air-conditioning system to the matter of cold water, compensate for traditional cold water temperature single loop feedback control strategy institute
The lagging influence brought.
Power frequency is used for the handpiece Water Chilling Units one-level water pump mentioned in background technology, two grades of water pumps use the central hollow of frequency conversion
Adjusting system, the present invention adjusts cold water temperature according to the reflux ratio of balance pipe and then implements cold power and adjusts, and can effectively build
Vertical supply and demand energy balance between cold and air-conditioning, reaches the purpose of energy-conservation, the reflux ratio calculator advantage that the present invention is designed
It is independent of live flow measurement instrument, and can relies on according to the reflux ratio and backflow direction calculated and build reflux ratio
Rate controller carries out on-line tuning to the cold water temperature setting value of handpiece Water Chilling Units, not only reduces project investment, also solves often
The problem of rule flow measurement instrument can not measure different directions flow simultaneously, and then realize supply and demand energy balance.
In this regard, the example of a concrete application scene as the embodiment of the present invention, as shown in figure 5, in this embodiment,
Cold power pretreatment unit C10a includes：
Cold water temperature measurement table T1, is arranged on supply channel L1, and cold water temperature measurement table T1 is located at supply channel L1
With the upstream of balance pipeline L3 junctions, the upstream for being located at water lines L1 and balance pipeline L3 junctions in supply channel L1 is measured
Water flow temperature.As shown in Figure 5, cold water temperature measurement table T1 is arranged on supply channel L1, while positioned at the supply channel
The supply channel of this in L1 L1 and the left side of balance pipeline L3 junctions.
Two grades of water pump cold water temperature measurement table T3 are removed, are arranged on supply channel L1, and go two grades of water pump cold water temperature surveys
Scale T3 be located in the downstream of supply channel L1 and balance pipeline L3 junctions, measurement supply channel L1 be located at supply channel L1 and
Balance the downstream water flow temperature of pipeline L3 junctions.As shown in Figure 5, two grades of water pump cold water temperature measurement table T3 are gone to be arranged on
On supply channel L1, while supply channel L1 and the right side for balancing pipeline L3 junctions in supply channel L1.
User return water temperature measurement table T4, is arranged on water return pipeline L2, and user's return water temperature measurement table T4 is located at back
It is located at water return pipeline L2 in water lines L2 and the upstream of balance pipeline L3 junctions, measurement water return pipeline L2 and balance pipeline L3 connects
Connect the upstream water flow temperature at place.As shown in Figure 5, user's return water temperature measurement table T4 is arranged on water return pipeline L2, simultaneously
The right side of water return pipeline L2 and balance pipeline L3 junctions in water return pipeline L2.
Return water temperature measurement table T2, is arranged on water return pipeline L2, and return water temperature measurement table T2 is located at water return pipeline L2
With the downstream of balance pipeline L3 junctions, measure and be located in water return pipeline L2 under water return pipeline L2 and balance pipeline L3 junctions
Swim water flow temperature.As shown in Figure 5, return water temperature measurement table T2 is arranged on water return pipeline L2, while positioned at the return pipe
The left side of water return pipeline L2 and balance pipeline L3 junctions in the L2 of road.
Balance pipe coolant-temperature gage measurement table T5, is arranged on balance pipeline L3, measurement balance pipeline L3 water flow temperature；
Balance pipe reflux ratio calculator C1, according to cold water temperature measurement table T1, goes two grades of water pump cold water temperature measurement tables
What T3, user's return water temperature measurement table T4, return water temperature measurement table T2 and balance pipe coolant-temperature gage measurement table T5 were measured respectively
Temperature, calculated equilibrium pipe reflux ratio；
Cold water temperature preset value calculation device A1, the reflux ratio calculated according to balance pipe reflux ratio calculator C1 is calculated
And export cold water temperature setting value.
More specifically, as shown in fig. 6, cold output control device C10b includes：
Cold water temperature controller A2, according to cold water temperature preset value calculation device A1 export cold water temperature setting value and
Cold water temperature measured by cold water temperature measurement table T1, calculates and exports the first control signal value；
Return water temperature feedforward controller A3, the return water temperature according to measured by return water temperature measurement table T2, calculates and exports
Second control signal value；
Adder S3, sums to the first control signal value with the second control signal value, regard the value after summation as work(
Rate control signal, Power Control is carried out to cold device 10.
For example, in one particular embodiment of the present invention, as shown in figure 9, T1a, T2a, T3a, T4a, T5a distinguish
It is cold water temperature measurement table T1, return water temperature measurement table T2, goes two grades of water pump cold water temperature measurement table T3, user's return water temperature to survey
Scale T4 and the temperature signal of balance pipe coolant-temperature gage T5 measurement tables output, it is collectively as balance pipe reflux ratio calculator C1's
Input；
For Fig. 4, in two grades of water pump systems of air-conditioning of the present invention, according to equation of heat balance, when T5a is equal to T4a
When, by balancing the backwater return flow in pipeline L3 with going the cold water flow ratio CCR of two grades of water pumps as follows：
CCR=(T3a-T1a)/(T4a-T1a)
Similarly, when T5a does not wait T4a, by balancing the cold-water reflux flow in pipeline L3 and removing cold circling water flow rate ratio
Rate CRR is as follows：
CRR=(T4a-T2a)/(T4a-T1a)
When T5a is equal to T4a, reflux ratio RR=CCR；
When T5a does not wait T4a, reflux ratio RR=-CRR；
Balance pipe reflux ratio calculator C1 output RR is connected to cold water temperature setting value as reflux ratio measured value
Calculator A1 input, cold water temperature preset value calculation device A1 setting value is set to 0, cold water temperature preset value calculation device A1
Output signal T1sp as cold water temperature controller A2 setting value, T1a is cold water temperature, access cold water temperature controller A2
Input, be used as measured value.T2a is return water temperature, access return water temperature feedforward controller A3 input, is used as measurement
Value.Adder S3 is by cold water temperature controller A2 output signal TIC1, return water temperature feedforward controller A3 output signal
TIC2 sums, are used as the input signal of the power inverter in cold device 10.
Cold water temperature preset value calculation device A1 and cold water temperature controller A2 can be used before pid control algorithm, return water temperature
Present controller A3 can method use lead-lag algorithm, form is K* (1+T1S)/(1+T2S), can also use PD control algorithm, i.e.,
Proportion-plus-derivative control algorithm, the embodiment of the present invention is merely illustrative to this, is not particularly limited.
In addition, fan coil is the preferable end prod of central air-conditioning, by heat exchanger, water pipe, filter, fan connects
Water pond, air bleeding valve, the composition such as support, its operation principle is the continuous air in room where recycling in unit, leads to air
It is subcooled after water coil and is cooled, keeps the constant of room temperature.Specifically, fan coil air-conditioner end is according to room temperature
And the deviation of design temperature, according to fixed logic, is opened and closed cold water two-way electromagnetic valve and adjusts fan high speed, middling speed, low speed
Gear, it is clear that in all run mode automatic identifications, fan open in high speed mode cold water magnetic valve heat exchange amount be it is maximum by
The design of two-way electromagnetic valve is typically used in fan coil, thus is difficult to valve that two-way electromagnetic valve is obtained using in the prior art
Position aperture.
Because two-port valve only has conducting and cut-off two states, opening for adjustable gate is obtained like that different from regulating valve
Degree, therefore, in order to weigh " aperture " of two-port valve, introduces the concept of equivalent valve seat opening value in the present invention.The present invention be for
Find and ask in air-conditioning system or branch road cold valves position maximum in all air conditioning terminals, thus to fan coil equivalent valve position
The calculating of opening value can be reduced to the make-and-break status information Wi according to two-way electromagnetic valve to calculate.
In this regard, in one particular embodiment of the present invention there is provided a kind of processing mode to two-way electromagnetic valve, such as scheming
Shown in 7, in one particular embodiment of the present invention, control system has the equivalent valve seat opening computing unit C2 of fan coil,
For calculating equivalent valve seat opening value；Two stage pump frequency-variable controller A4, for according to equivalent valve seat opening value to two grades of water pumps
Carry out VFC.
Further, in one of the invention more specifically embodiment, as shown in figure 8, two stage pump frequency-variable controller A4 is also
Including：Open the equivalent valve position that maximum value signal selector S1, the reception equivalent valve seat opening computing unit C2 of fan coil are calculated
The cold valves aperture value of other air conditioning terminals in angle value, and air-conditioning system in addition to fan coil, selects the equivalent valve
In position opening value and the cold valves aperture value maximum of valve seat opening as maximum value signal selector S1 output signal；
Two grades of water pump Ps 20, according to maximum value signal selector S1 institutes output signal, are carried out frequency conversion control by cold valves valve positioner S2
System.
For example, as shown in Figure 10, Wi (i=1~m) is the logical of each fan coil two-way electromagnetic valve in air-conditioning system
Disconnected status signal, the status signal is ON/OFF types, its as the equivalent valve seat opening computing unit C2 of fan coil input
Variable.Vi (i=1~m) is the equivalent valve seat opening computing unit C2 of fan coil output variable, and Vi calculated values are following value,
I.e.：In a controlling cycle, the ratio between ON time and total run time of fan coil two-way electromagnetic valve multiply in 100%.Ui
(i=1~n) is to be subordinate to other air conditioning terminals such as combined air conditioning box, PAU in air-conditioning system with fan coil
Cold valves aperture, Ui and Vi are in the lump as maximum value signal selector S1 input, and maximum value signal selector S1 is used to select
Maximum in all signals, but not limited to this, the mode of selection signal can be adjusted according to the burden requirement of different units
It is whole.UV be maximum value signal selector S1 output, specifically UV be maximum value signal selector S1 in all inputs most
Big value, so as to be selected and be exported to cold valves valve positioner S2 input by maximum value signal selector S1, is used as cold water
Valve valve positioner S2 measured value, cold valves valve positioner S2 setting value typically chooses high level, such as scope 90%~
95%, cold valves valve positioner S2 output valve are connected to two grades of water pumps of two grades of water pump Ps 20 or branch, for controlling two grades of water
Pump frequency conversion rotating speed.Here, cold valves valve positioner S2 can use pid algorithm, but not limited to this, for example, can also select PI
Other algorithms such as algorithm.
In summary, power frequency is used for handpiece Water Chilling Units primary pump, two stage pump uses the central air conditioner system of frequency conversion, this hair
Bright embodiment can adjust cold water temperature according to the reflux ratio of balance pipe and then implement the adjustment of cold power, can effectively set up
Supply and demand energy balance between cold and air-conditioning, reaches the purpose of energy-conservation, the reflux ratio calculator that the present invention is designed independent of
Live flow measurement instrument, and can be according to the reflux ratio and backflow direction calculated.
The present invention is in face of the hybrid air-conditioning system containing combined air conditioning box unit, PAU and fan coil system
System, for fan coil system, by the two-way electromagnetic valve ON time and the ratio of total run time of calculating, to characterize blower fan
The equivalent aperture of coil pipe cold valves, solves what is run into according to the valve position in heating power least favorable loop to carry out hydraulic balancing regulation
Fan coil cold valves aperture can not direct measurement or expression problem, adjust each according to the valve opening in heating power least favorable loop
Branch's two stage pump frequency conversion rotating speed.
Finally, it is necessary to which what is illustrated is, although illustrate each controller and temperature in described above by taking integrated device as an example
Measurement table is illustrated, still, they can be integrated in an integrated controller, or respectively to should integrated controller
Each functional module, the embodiment of the present invention is not limited this.
The foregoing is only a specific embodiment of the invention, but protection scope of the present invention is not limited thereto, any
Those familiar with the art the invention discloses technical scope in, change or replacement can be readily occurred in, should all be contained
Cover within protection scope of the present invention.Therefore, protection scope of the present invention should be based on the protection scope of the described claims.
Claims (4)
1. a kind of change water temperature control system suitable for air-conditioning Primary pump system, including cold device, it is connected to the cold dress
The supply channel for the delivery port put, be connected to the cold device water inlet water return pipeline, be arranged on the supply channel
Air-conditioning system between the water return pipeline and the balance pipeline being arranged in parallel with the air-conditioning system；
Characterized in that, the air-conditioning system includes one or more air conditioning terminal, it is one or more than one
Air conditioning terminal includes the air conditioning terminal that type is fan coil；The water return pipeline, which is provided with, to be used for the cold device backwater
One-level water pump, the supply channel of the air-conditioning system is provided with two grades of water pumps for being used for supplying water to the air-conditioning system；
The control system also includes：
Cold power pretreatment unit, the reflux ratio for calculating the balance pipeline, according to the reflux ratio, is exported cold
Coolant-temperature gage setting value；
Cold output control device, it is right for the cold water temperature setting value exported according to the cold power pretreatment unit
The cold device carries out Power Control；
The control system also includes two grades of variable frequency control device of water pump, for according to all air conditioning terminals in the air-conditioning system
Valve seat opening maximum in cold water regulating valve, VFC is carried out to two grades of water pumps.
2. control system according to claim 1, it is characterised in that
The cold power pretreatment unit includes：
Cold water temperature measurement table, is arranged on the supply channel, and the cold water temperature measurement table is located at the supply channel
With the upstream of the balance line connection, measure and be located at the supply channel and balance pipeline company in the supply channel
Connect the upstream water flow temperature at place；
Two grades of water pump cold water temperature measurement tables are gone, are arranged on the supply channel, and described go the survey of two grades of water pump cold water temperatures
Scale is located at the downstream of the supply channel and the balance line connection, measures and is located at described supply water in the supply channel
The downstream water flow temperature of pipeline and the balance line connection；
User's return water temperature measurement table, is arranged on the water return pipeline, and user's return water temperature measurement table is positioned at described
The upstream of water return pipeline and the balance line connection, measures and is located at the water return pipeline in the water return pipeline and described flat
The upstream water flow temperature of weighing apparatus line connection；
Return water temperature measurement table, is arranged on the water return pipeline, and the return water temperature measurement table is located at the water return pipeline
With the downstream of the balance line connection, measure and be located at the water return pipeline and balance pipeline company in the water return pipeline
Connect the downstream water flow temperature at place；
Balance pipe coolant-temperature gage measurement table, is arranged on the balance pipeline, measures the water flow temperature of the balance pipeline；
Balance pipe reflux ratio calculator, according to the cold water temperature measurement table, goes two grades of water pump cold water temperature measurement tables, users
The temperature that return water temperature measurement table, return water temperature measurement table and balance pipe coolant-temperature gage measurement table are measured respectively, calculated equilibrium
Pipe reflux ratio；
Cold water temperature preset value calculation device, the reflux ratio calculated according to the balance pipe reflux ratio calculator is calculated and defeated
Go out cold water temperature setting value.
3. control system according to claim 1, it is characterised in that
The cold output control device includes：
Cold water temperature controller, the cold water temperature setting value and described exported according to the cold water temperature preset value calculation device
Cold water temperature measured by cold water temperature measurement table, calculates and exports the first control signal value；
Return water temperature feedforward controller, the return water temperature according to measured by the return water temperature measurement table calculates and exports second
Control signal value；
Adder, sums to first control signal value with second control signal value, using the value after summation as
Power control signal, Power Control is carried out to the cold device.
4. control system according to any one of claim 1 to 3, it is characterised in that the air-conditioning system includes one
Air conditioning terminal above, one air conditioning terminal above also includes other air conditioning terminals in addition to fan coil；
Two grades of variable frequency control device of water pump include：
The equivalent valve seat opening computing unit of fan coil, the equivalent valve seat opening value for calculating the fan coil；
Maximum value signal selector, receives the equivalent valve seat opening that the equivalent valve seat opening computing unit of fan coil is calculated
Value, and other air conditioning terminals in air-conditioning system in addition to fan coil cold valves aperture value, select the equivalent valve position
Opening value and the maximum in the cold valves aperture value, are used as the output of maximum value signal selector；
Cold valves valve positioner, the maximum exported according to the maximum value signal selector, to two grades of water pumps
Carry out VFC.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510464504.3A CN105066341B (en) | 2015-07-31 | 2015-07-31 | Suitable for the change water temperature control system of air-conditioning Primary pump system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510464504.3A CN105066341B (en) | 2015-07-31 | 2015-07-31 | Suitable for the change water temperature control system of air-conditioning Primary pump system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105066341A CN105066341A (en) | 2015-11-18 |
| CN105066341B true CN105066341B (en) | 2017-10-20 |
Family
ID=54495774
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510464504.3A Active CN105066341B (en) | 2015-07-31 | 2015-07-31 | Suitable for the change water temperature control system of air-conditioning Primary pump system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105066341B (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111520889A (en) * | 2016-01-26 | 2020-08-11 | 熊火平 | Dynamic hydraulic balance adjusting device of central air conditioning system |
| CN113339972A (en) * | 2021-06-07 | 2021-09-03 | 博彦物联科技(北京)有限公司 | Water system control method and device and storage medium |
| CN114576812B (en) * | 2021-12-01 | 2023-12-26 | 华信咨询设计研究院有限公司 | Variable flow control method and system for water supply temperature time-varying cold water system |
| CN115183435A (en) * | 2022-06-13 | 2022-10-14 | 西安华为数字能源技术有限公司 | Control method and device of air conditioning system |
| CN116045461B (en) * | 2023-03-07 | 2023-10-27 | 广东热矩智能科技有限公司 | Energy-saving control method and device for air-cooled air conditioner based on water supply and return temperature adjustment |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5540555A (en) * | 1994-10-04 | 1996-07-30 | Unosource Controls, Inc. | Real time remote sensing pressure control system using periodically sampled remote sensors |
| CN1928447A (en) * | 2006-09-30 | 2007-03-14 | 四川长虹电器股份有限公司 | Cooling system for cold and hot water machine set with fan disc pipe |
| CN101354170A (en) * | 2007-07-24 | 2009-01-28 | 株式会社山武 | Air conditioner control system and method |
| CN101865496A (en) * | 2010-06-22 | 2010-10-20 | 中国建筑第八工程局有限公司 | Chilled water direct supply system and method |
| CN204254798U (en) * | 2014-09-26 | 2015-04-08 | 广东省建筑设计研究院 | A kind of air conditioner heat reclaims hot water or cold water's flow equalization system |
| CN204830333U (en) * | 2015-07-31 | 2015-12-02 | 新智能源系统控制有限责任公司 | Become water temperature control system suitable for air conditioner two stage pump system |
-
2015
- 2015-07-31 CN CN201510464504.3A patent/CN105066341B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5540555A (en) * | 1994-10-04 | 1996-07-30 | Unosource Controls, Inc. | Real time remote sensing pressure control system using periodically sampled remote sensors |
| CN1928447A (en) * | 2006-09-30 | 2007-03-14 | 四川长虹电器股份有限公司 | Cooling system for cold and hot water machine set with fan disc pipe |
| CN101354170A (en) * | 2007-07-24 | 2009-01-28 | 株式会社山武 | Air conditioner control system and method |
| CN101865496A (en) * | 2010-06-22 | 2010-10-20 | 中国建筑第八工程局有限公司 | Chilled water direct supply system and method |
| CN204254798U (en) * | 2014-09-26 | 2015-04-08 | 广东省建筑设计研究院 | A kind of air conditioner heat reclaims hot water or cold water's flow equalization system |
| CN204830333U (en) * | 2015-07-31 | 2015-12-02 | 新智能源系统控制有限责任公司 | Become water temperature control system suitable for air conditioner two stage pump system |
Also Published As
| Publication number | Publication date |
|---|---|
| CN105066341A (en) | 2015-11-18 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105066341B (en) | Suitable for the change water temperature control system of air-conditioning Primary pump system | |
| CN103411293B (en) | The cooling water system for air conditioning control method regulated based on end cold initiative and device | |
| CN105757851B (en) | A kind of chilled water variable-flow energy-saving control method and control system | |
| CN106091341B (en) | Air conditioner supplying natural wind temperature control method | |
| CN104101105B (en) | The composite control method of a kind of heating crude oil furnace temperature and device thereof | |
| CN107728685A (en) | A kind of intelligent constant-temperature water controling method | |
| CN204830333U (en) | Become water temperature control system suitable for air conditioner two stage pump system | |
| CN107559945A (en) | A kind of waterpower self-regulation heating system and self-adjusting method | |
| CN109805756A (en) | A kind of control method of quickly cooling water dispenser | |
| CN204943786U (en) | Be applicable to the vari-able flow control system of air-conditioning Primary pump system | |
| CN106765957B (en) | Water supply variable temperature control system based on load prediction and comfort level feedback | |
| CN204830288U (en) | Control system is pressed to variation suitable for air conditioner one -level pumping system | |
| CN105020822B (en) | Suitable for the change differential pressure control system of air-conditioning Variable flow system | |
| CN104681470A (en) | Distribution system and flow control method of chemical liquid medicine | |
| CN111457781B (en) | Parallel loop water mixing heat exchange PID control system and control method thereof | |
| CN204987365U (en) | Become water temperature control system suitable for air conditioner one -level pumping system | |
| CN105066343B (en) | Suitable for the change water temperature control system of air-conditioning Variable flow system | |
| CN103217058A (en) | Chiller heat exchanging amount control system | |
| CN209782784U (en) | geothermal and hanging piece mixed heat supply type adjusting system | |
| CN105004011B (en) | Suitable for the vari- able flow control system of air-conditioning Primary pump system | |
| CN105240993A (en) | Fine energy-saving control system of central air conditioner and achieving method of fine energy-saving control system | |
| CN205037420U (en) | Building energy -saving control system suitable for many energy supply stations | |
| CN110671869B (en) | Variable working condition energy efficiency test system of cold water supply system and application thereof | |
| CN104853516B (en) | A kind of synchrotron multistage tandem temperature adjustment cooling water system | |
| CN105066342B (en) | Suitable for the vari- able flow control system of air-conditioning Variable flow system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |