CN105066343B - Suitable for the change water temperature control system of air-conditioning Variable flow system - Google Patents
Suitable for the change water temperature control system of air-conditioning Variable flow system Download PDFInfo
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- CN105066343B CN105066343B CN201510465146.8A CN201510465146A CN105066343B CN 105066343 B CN105066343 B CN 105066343B CN 201510465146 A CN201510465146 A CN 201510465146A CN 105066343 B CN105066343 B CN 105066343B
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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
-
- 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
-
- 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
- F24F11/46—Improving electric energy efficiency or saving
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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
- F24F11/63—Electronic processing
-
- 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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- 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
- F24F2140/50—Load
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- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fuzzy Systems (AREA)
- Mathematical Physics (AREA)
- Signal Processing (AREA)
- Life Sciences & Earth Sciences (AREA)
- Atmospheric Sciences (AREA)
- Air Conditioning Control Device (AREA)
Abstract
The present invention provides a kind of change water temperature control system suitable for air-conditioning Variable flow system, is related to refrigeration control field, is invented for accuracy when improving the adjustment of cold power with energy consumption is reduced.The control system includes cold device, supply channel, water return pipeline, air-conditioning system and balance pipeline, wherein, air-conditioning system includes one or more air conditioning terminals in parallel, and air conditioning terminal is the polytype including fan coil；Water return pipeline is provided with primary pump；The control system also includes cold power pretreatment unit and cold output control device and water supply difference pressure control device, and cold power pretreatment unit is used to obtain return water temperature；The water flow temperature of maximum and cold power pretreatment unit output of the cold output control device in all air conditioning terminal cold water valve seat openings in air-conditioning system, Power Control is carried out to cold device.The present invention can be used for the cold power control techniques suitable for air-conditioning Variable flow system.
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 Variable flow system
System processed.
Background technology
At present, a part of handpiece Water Chilling Units, particularly Large Central Air Conditioning System system is using one-level general pump.
This is because, as shown in figure 1, traditional Variable flow system is as follows：Including water chilling unit system (i.e. cold device),
One-level pump group, supply channel and water return pipeline, wherein, supply channel includes water main 5 and is arranged in parallel on water main 5
Multiple water supply pipes 2, water return pipeline includes return main 6 and multiple backwater for being arranged in parallel on return main 6 are in charge of 3,
Water chilling unit system includes the multiple handpiece Water Chilling Units 1 being arranged in parallel, and water main 5 includes multiple water supply pipes 2, and return main 6
It is in charge of 3 including multiple backwater, one-level pump group includes the multiple pumps 4 being arranged in parallel, the outlet pipe and primary pump of water chilling unit system
The water inlet pipe of group is connected, and the outlet pipe of one-level pump group is aggregated into water main 5 and is connected with water supply pipe 2, and by sharp after user
It is in charge of 3 with backwater and 3 return mains 6 collected are in charge of by backwater are back to water chilling unit system and recycles.
It is different from variable frequency pump, although the one-level general pump used within air-conditioning systems can not be carried out as one-level variable frequency pump
Flow-rate adjustment, still, due to its fewer than one-level variable frequency pump trouble point, that is, a set of converter plant, therefore systematicness are lacked
Can more it stablize.
For suitable for the change water temperature control system of air-conditioning Variable flow system, in order to really overcome energy consumption to waste, because
For primary pump using general pump, cold water conveying can be without the concern for need to only adjust and start with, realize cold supply and demand from cold power
Balance simultaneously, reduces cold energy consumption, the technology for having two aspects at present, first, the cold power regulation skill based on air conditioner load
Art, it calculates handpiece Water Chilling Units set value of the power, realize cold supply and air conditioner load effective according to the load of air-conditioning
Match somebody with somebody；Second, constant water outlet temperature setting value, cold power are automatically adjusted with the change of return water temperature；Hydraulic equilibrium controls skill
Art, have in correlation technique and typically supply backwater differential pressure to adapt to air-conditioning system to stable using by adjusting balance pipe return valve
Burden requirement.
But the air conditioning design load calculation value that cold power regulation technology is based on, generally according to water supply flow and for backwater
What differential thermal calculation was got, flow instrument its reliability of long-term use and the degree of accuracy are difficult to protect sign, while are used for air conditioning design load calculation
Supply water temperature and return water temperature because for water return pipeline length is different, flow velocity difference is clearly present the time difference, and this time difference is to change
, factors above often destroys the accuracy of air conditioning design load calculation, so as to cause load adjustment to have deviation, the equilibrium of supply and demand
It is difficult to really establish；It is existing and constant water outlet temperature setting value, cold power are automatically adjusted with the change of return water temperature
Problem is that the ratio that typical temperature setting value is set is relatively low to meet the needs of high load capacity, and in underload, cold efficiency can be located
In one than relatively low state, the problem of causing energy consumption too high.
In summary, in above-mentioned air-conditioned load adjustment technology, it is accurate the adjustment of cold power to be present in above-mentioned technology
The problem of property is bad.
The content of the invention
In view of this, it is an object of the invention to provide a kind of change water temperature suitable for air-conditioning Variable flow system to control system
System, for ensuring the accuracy during adjustment of cold power, so that it is energy-saving, complicated applications occasion can be applied to.
To achieve the above object, a kind of the first aspect of the present invention, there is provided change water temperature suitable for air-conditioning Variable flow system
Control system, including cold device, be connected to the cold device delivery port supply channel, be connected to the cold device
The water return pipeline of water inlet, the air-conditioning system that is arranged between the supply channel and the water return pipeline and with the sky
The balance pipeline that adjusting system is arranged in parallel；
Wherein, the air-conditioning system includes one or more air conditioning terminals in parallel, and air conditioning terminal type is to include blower fan
Polytype including coil pipe；Water return pipeline is provided with the primary pump being used for cold device backwater；
The control system also includes：
Cold power pretreatment unit, for the equivalent valve seat opening value according to the fan coil, and air-conditioning system
In other air conditioning terminals in addition to fan coil cold valves aperture value, select in the air conditioning terminal cold water valve seat opening
Maximum is as output signal；
Cold output control device, for exported according to the cold power pretreatment unit valve seat opening signal,
The water flow temperature of the water flow temperature of the supply channel and the water return pipeline, Power Control is carried out to the cold device；
Water supply difference pressure control device, for according to backwater differential pressure is supplied, being controlled to the return valve on balance pipeline.
In the first possible implementation of the first aspect of the present invention, the cold power pretreatment unit bag
Include：
The equivalent valve seat opening computing unit of fan coil, for calculating the equivalent valve seat opening value of the fan coil；
Maximum value signal selector, receive the equivalent valve position that the equivalent valve seat opening computing unit of the fan coil is calculated
The cold valves aperture value of other air-conditionings in opening value, and air-conditioning system in addition to fan coil, select the equivalent valve position
Opening value and the maximum in the cold valves aperture value, as valve seat opening signal output.
The first with reference to the first aspect of the present invention is possible, in second of possible realization of the first aspect of the present invention
In mode,
Cold output control device includes：
Cold valves valve positioner, the valve seat opening signal exported according to the maximum value signal selector, calculate and defeated
Go out cold water temperature duty setting signal；
Cold water temperature measurement table, it is arranged on the supply channel, measures the cold water temperature of the supply channel；
Return water temperature measurement table, it is arranged on the water return pipeline, measures the return water temperature of the water return pipeline；
Cold water temperature controller, according to the cold valves valve positioner export cold water temperature duty setting signal and
Cold water temperature measured by the cold water temperature measurement table, calculate and export the first control signal value；
Return water temperature feedforward controller, according to the return water temperature measured by the return water temperature measurement table, calculate and export
Second control signal value；
Adder, first control signal value and second control signal value are summed, by the value after summation
Exported as power control signal.
Change water temperature control system provided in an embodiment of the present invention suitable for air-conditioning Variable flow system, due to supplying water and returning
Multiple temperature measurement equipments such as cold water temperature measurement table, return water temperature measurement table are respectively arranged with water lines, so as to fully sharp
Reflect the parameter of cold power comprehensively with cold water temperature, return water temperature etc.；On this basis by being arranged on fan coil
The equivalent valve seat opening computing unit of fan coil calculate its equivalent valve seat opening value, so as to further solving complicated applications field
The measurement problem of valve seat opening under closing, maximum in cold valves position in all air conditioning terminals of air-conditioning system simultaneously are allowed to transport
Go in a high-value, change cold water temperature setting value with this carries out power adjusting to cold device, effectively establishes cold work(
The equilibrium of supply and demand of rate and air conditioner load, control effect shows as cold water temperature setting value height during underload, on the contrary then on the contrary；Simultaneously
The cold-water reflux amount for enabling to balance on pipeline is preferably minimized, thus the change according to air conditioner load can be realized according to the present invention
Change and cause handpiece Water Chilling Units to keep a higher operational efficiency to reach the purpose for reducing cold energy consumption, improve Consumer's Experience.
Brief description of the drawings
Fig. 1 is the schematic diagram for the change water temperature control system for being applied to air-conditioning Variable flow system that prior art provides；
Fig. 2 is the schematic diagram of the change water temperature control system for being applied to air-conditioning Variable flow system of the embodiment of the present invention；
Fig. 3 is the structural representation of the change water temperature control system for being applied to air-conditioning Variable flow system of the embodiment of the present invention；
Fig. 4 is the schematic diagrames of the cold power pretreatment unit C10a of control system shown in Fig. 3 in systems；
Fig. 5 is the schematic diagrames of the cold output control device C10b of control system shown in Fig. 4 in systems；
Fig. 6 is the cold power pretreatment unit of control system and the original of cold output control device of the embodiment of the present invention
Reason explanation figure；
Fig. 7 is the principle explanatory diagram of the water supply difference pressure control device 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 describes, it is clear that described embodiment is only part of the embodiment of the present invention, rather than whole embodiments.It is based on
Embodiment in the present invention, those of ordinary skill in the art are obtained every other under the premise of creative work is not made
Embodiment, belong 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 Variable flow system.Lead to below
Specific embodiment is crossed to carry out in detail the change water temperature control system provided in an embodiment of the present invention suitable for air-conditioning Variable flow system
Describe in detail bright.
In the one-level power frequency pumping system as prior art that such as background technology is proposed, the cold based on air conditioner load
Power adjustment technology, because air conditioner load is difficult to obtain accurate calculated value, the cold equilibrium of supply and demand is difficult to realize；So if pass through
The cold power adjustment technology of air conditioner load in background technology is controlled, then controls quality to be difficult to ensure that.And for and it is permanent
Coolant-temperature gage setting value is made, the problem of cold power is automatically adjusted with the change of return water temperature, existed is high negative to meet
The needs of lotus, the ratio that typical temperature setting value is set is relatively low, and in underload, cold efficiency can be in one than relatively low shape
State, the problem of causing energy consumption too high.
The cardinal principle of the embodiment of the present invention is, in the control of air-conditioning one-level water pump system provided in an embodiment of the present invention
In system, according to the equivalent aperture of designed fan coil cold valves, in face of the hybrid air-conditioning with fan coil system
During system, adjust cold water temperature setting value according to the valve opening in heating power least favorable loop and then implement the adjustment of cold power,
Cold energy consumption can be reduced, reaches the purpose for realizing energy-conservation, enables to adapt to the service requirement of complicated applications occasion.
Specifically, for the problems of above-mentioned background technology, the embodiment of the present invention provides one kind and is applied to air-conditioning
The change water temperature control system of Variable flow system, as shown in Figures 2 and 3, including cold device 10, it is connected to going out for cold device 10
The supply channel L1 at the mouth of a river, be connected to cold device 10 water inlet water return pipeline L2 and be arranged on supply channel L1 with return
Air-conditioning system L3 between the water lines L2 and balance pipeline L4 being arranged in parallel with the air-conditioning system L3；
Wherein, air-conditioning system L3 includes the air conditioning terminal 20 of one and the above, and air conditioning terminal 20 is to include fan coil to exist
Interior polytype；Water return pipeline L2 is provided with the primary pump P10 being used for cold device backwater；
Control system also includes：
Cold power pretreatment unit C10a, for the equivalent valve seat opening value according to fan coil 20, and air-conditioning system
The cold valves aperture value of other air conditioning terminals in system L3 in addition to fan coil 20, selects the air conditioning terminal cold valves position to open
Maximum in degree is as output signal U V.
Cold output control device C10b, for the valve seat opening letter exported according to cold power pretreatment unit C10a
Number UV, supply channel L1 water flow temperature T1a and water return pipeline L2 water flow temperature T2a, power control is carried out to cold device 10
System.
Water supply difference pressure control device C10c, for according to backwater differential pressure is supplied, being controlled to the return valve U on balance pipeline L4
System.
The course of work of the above embodiment of the present invention is briefly explained below.Cold device 10 is primary pump P10's
Under industrial frequency control, current are supplied to supply channel L1, current flow through supply channel L1 and are supplied to air-conditioning branch road L3, and finally
Cold device 10 is flowed back to via water return pipeline L2.Here, cold power pretreatment unit C10a can be to each in air-conditioning branch road 20
The simulation that fan coil carries out valve seat opening is calculated, and the equivalent valve position for obtaining the cold valves aperture equivalent to other types air-conditioning is opened
Angle value, so as to select the equivalent valve seat opening value and the maximum in the cold valves aperture value, as valve seat opening signal
Output, cold output control device C10b are then based on being respectively arranged with cold water temperature measurement in water supply and water return pipeline L1, L2
Water flow temperature measured by table T1, return water temperature measurement table T2, further combined with cold power pretreatment unit C10a outputs
Valve seat opening signal, power adjusting is carried out to cold device 10.Return valve U, the control of water supply differential pressure are provided with balance pipeline L4
Device C10c can pass through detected air conditioning terminal and supply backwater differential pressure, and return valve U is controlled so that on balance pipeline L4
Cold-water reflux amount be preferably minimized.
In addition, fan coil is the preferable end prod of central air-conditioning, by heat exchanger, water pipe, filter, fan, connect
Water pond, air bleeding valve, support etc. form, and its operation principle is the air in room where constantly being recycled in unit, leads to air
It is cooled after water coil is subcooled, to keep 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, it 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,
Because fan coil typically uses the design of two-way electromagnetic valve, thus it is difficult to obtain two-way electromagnetic valve using in the prior art
Valve seat opening.
Due to two-port valve only turn on cut-off two states, different from the aperture of the such adjustable gate of regulating valve, because
This, 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 is to find
Cold valves position maximum in all air conditioning terminals is asked in air-conditioning system or branch road, thus to the equivalent valve seat opening value of fan coil
Calculating can be reduced to the make-and-break status information Wi according to two-way electromagnetic valve to calculate.
On the other hand, the example of a concrete application scene as the embodiment of the present invention, as shown in figure 4, in this embodiment,
Cold power pretreatment unit C10a includes：
The equivalent valve seat opening computing unit C1 of fan coil, the 20 equivalent valve seat openings for calculating the fan coil
Value；
Maximum value signal selector S1, receive the equivalent valve position that the equivalent valve seat opening computing unit C1 of fan coil is calculated
The cold valves aperture value of other air-conditionings in opening value, and same air-conditioning branch road in addition to fan coil, select equivalent valve position
Opening value and the maximum in cold valves aperture value, as valve seat opening signal output.
More specifically, as shown in figure 5, the cold output control device C10b includes：
Cold valves valve positioner A1, the valve seat opening signal exported according to maximum value signal selector S1, calculate and defeated
Go out cold water temperature set value calculation signal；
Cold water temperature measurement table T1, is arranged on supply channel L1, measurement supply channel L3 cold water temperature；
Return water temperature measurement table T2, is arranged on water return pipeline L2, measurement water return pipeline L2 return water temperature；
Cold water temperature controller A2, according to the cold valves valve positioner A1 cold water temperature setting values exported and cold water
Cold water temperature measured by temperature survey table T1, calculate and export the first control signal value TIC1；
Return water temperature feedforward controller A3, according to the return water temperature measured by return water temperature measurement table T2, calculate and export
Second control signal value TIC2；
Adder, the first control signal value TIC1 and the second control signal value TIC2 are summed, by the value after summation
Exported as power control signal.
For example, in one particular embodiment of the present invention, as shown in FIG. 6 and 7, Wi (i=1~m) is some
The on off operating mode signal of each fan coil two-way electromagnetic valve of branch, the status signal are ON/OFF types, and it is as fan unit
Manage equivalent valve seat opening computing unit C1 input variable.Vi (i=1~m) is the equivalent valve seat opening computing unit of fan coil
C1 output variable, Vi calculated values are following value, i.e.,：In a controlling cycle, during the conducting of fan coil two-way electromagnetic valve
Between multiply with the ratio between total run time in 100%.Ui (i=1~n) is the assembled air-conditioner being subordinate to fan coil in same branch
The cold valves aperture of other air-conditioner sets such as case, PAU, Ui and Vi are in the lump as the defeated of maximum value signal selector S1
Enter, maximum value signal selector S1 is used to selecting maximum in all signals, but not limited to this, and the mode of selection signal can be with
It is adjusted according to the burden requirement of different units.UV is maximum value signal selector S1 output, and specifically UV is maximum
The maximum of all inputs in value signal selector S1, so as to be selected and be exported to cold valves valve by maximum value signal selector S1
Level controller A1 input, as cold valves valve positioner A1 measured value, cold valves valve positioner A1 setting value
General to choose high level, if scope is 90%~95%, cold valves valve positioner A1 output valve is connected to cold water temperature control
Device A2, the setting value as cold water temperature controller A2.T1a is cold water temperature, access cold water temperature controller A2 input,
As measured value.T2a is return water temperature, access return water temperature feedforward controller A3 input, as measured value.Adder S3
By cold water temperature controller A2 output signal TIC1, return water temperature feedforward controller A3 output signal TIC2 sums, as
The input signal of power inverter in cold device 10, to control the power of refrigerator device.Here, cold water temperature setting value
Calculator A1 and cold water temperature controller A2 can use pid control algorithm, and return water temperature feedforward controller A3 can use advanced stagnant
Algorithm afterwards, form is K* (1+T1S)/(1+T2S), in addition, water supply difference pressure control device C10c obtains coming from air conditioning terminal 20 1
Side supplies backwater pressure difference DP, can use pid control algorithm etc., and the return valve U on balance pipeline L4 is carried out according to result of calculation
Control, the embodiment of the present invention is merely illustrative to this, is not particularly limited.
, wherein it is desired to explanation, the quantity of the air-conditioning 20 can be one and more than.
In summary, the present invention is in face of containing combined air conditioning box unit, PAU and fan coil system
Hybrid a/c system, for fan coil system, by the two-way electromagnetic valve ON time of calculating and the ratio of total run time,
To characterize the equivalent aperture of fan coil cold valves, solve according to the valve position in heating power least favorable loop to carry out cold power tune
The fan coil cold valves aperture that whole or hydraulic balancing regulation is run into can not direct measurement or expression problem, in the present invention
It is that cold water temperature and then adjustment cold power are adjusted according to the valve opening in heating power least favorable loop.
Finally, it is necessary to illustrate, although illustrating each controller and temperature by taking integrated device as an example in described above
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 are 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 (3)
1. a kind of change water temperature control system suitable for air-conditioning Variable flow 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 multiple air conditioning terminals in parallel, the multiple air conditioning terminal in parallel includes
Assembled air-conditioner cabinet group, PAU and fan coil；The water return pipeline, which is provided with, to be used for the cold device
The primary pump of backwater；
The control system also includes：
Cold power pretreatment unit, for the equivalent valve seat opening value according to the fan coil, and removed in air-conditioning system
The cold valves aperture value of other air conditioning terminals beyond fan coil, the equivalent valve seat opening value is selected to be opened with the cold valves
Maximum in angle value is as output signal；
Cold output control device, for the valve seat opening signal, described exported according to the cold power pretreatment unit
The water flow temperature of the water flow temperature of supply channel and the water return pipeline, Power Control is carried out to the cold device；
Water supply difference pressure control device, for according to backwater differential pressure is supplied, being controlled to the return valve on the balance pipeline.
2. control system according to claim 1, it is characterised in that
The cold power pretreatment unit includes：
The equivalent valve seat opening computing unit of fan coil, for calculating the equivalent valve seat opening value of the fan coil；
Maximum value signal selector, receive the equivalent valve seat opening that the equivalent valve seat opening computing unit of the fan coil is calculated
Value, and the cold valves aperture value of other air conditioning terminals in the air-conditioning system in addition to fan coil, select described equivalent
Valve seat opening value and the maximum in the cold valves aperture value, as valve seat opening signal output.
3. control system according to claim 2, it is characterised in that
The cold output control device includes：
Cold valves valve positioner, the valve seat opening signal exported according to the maximum value signal selector, calculates and exports cold
Coolant-temperature gage duty setting signal；
Cold water temperature measurement table, it is arranged on the supply channel, measures the cold water temperature of the supply channel；
Return water temperature measurement table, it is arranged on the water return pipeline, measures the return water temperature of the water return pipeline；
Cold water temperature controller, the cold water temperature duty setting signal and described exported according to the cold valves valve positioner
Cold water temperature measured by cold water temperature measurement table, calculate and export the first control signal value；
Return water temperature feedforward controller, according to the return water temperature measured by the return water temperature measurement table, calculate and export second
Control signal value；
Adder, first control signal value and second control signal value are summed, using the value after summation as
Power control signal exports.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510465146.8A CN105066343B (en) | 2015-07-31 | 2015-07-31 | Suitable for the change water temperature control system of air-conditioning Variable flow system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510465146.8A CN105066343B (en) | 2015-07-31 | 2015-07-31 | Suitable for the change water temperature control system of air-conditioning Variable flow system |
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| CN105066343A CN105066343A (en) | 2015-11-18 |
| CN105066343B true CN105066343B (en) | 2017-11-28 |
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| 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 |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
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