CN2867190Y - Central air conditioning intelligence control energy-saving system - Google Patents
Central air conditioning intelligence control energy-saving system Download PDFInfo
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- CN2867190Y CN2867190Y CN 200620050122 CN200620050122U CN2867190Y CN 2867190 Y CN2867190 Y CN 2867190Y CN 200620050122 CN200620050122 CN 200620050122 CN 200620050122 U CN200620050122 U CN 200620050122U CN 2867190 Y CN2867190 Y CN 2867190Y
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- frequency converter
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Abstract
The utility model discloses an intelligent control energy saving system of central air conditioner, which comprises a power supply, a frequency changer, a fuzz controller, an external PID controller, a PLC controller, a control switch, a touch screen, a switch input, a data collector, a switch power supply, an instructing lamp and an alarm circuit. The invention is characterized in that the PLC controller includes the fuzz controller connected with the external PID controller, the invention processes the combination and control optimization on the temperature and pressure signals of central air conditioner to adjust the central air conditioner at best operation state and save energy most. The utility model utilizes full-automatic control technique with automatic adjustment according to the load condition.
Description
Technical field
The utility model relates to a kind of central air-conditioning intelligence control energy conserving system.
Background technology
Central air conditioner system is the system of a kind of multivariable, multi-parameter, relates to a plurality of variablees such as inflow temperature, leaving water temperature, intake pressure, pressure of supply water.Existing central air-conditioning energy-saving system just adopts simple fuzzy controller, can only carry out fuzzy operation by gathering outside temperature signal or pressure signal, the running frequency of the frequency converter of control central air conditioner system, do not handle according to the temperature signal and the pressure signal of outside simultaneously, can't reach the optimum Working of central air-conditioning, the existing PID control energy conserving system central air-conditioning that is provided with, its PID output signal is directly to send into the frequency converter of central air-conditioning, directly control the frequency converter running frequency, though can realize unsteady flow amount control by control to the running frequency of central air conditioner water pump to central air-conditioning, but pid parameter is difficult for accurately being provided with, and be subject to external environment influence, the entire system control performance is relatively poor.
The utility model content
The purpose of this utility model is to provide a kind of can carry out complex optimum to the temperature signal of the outside of central air-conditioning and pressure signal and handle, and tries to achieve the frequency optimum traffic of central air-conditioning, realizes at utmost energy-conservation central air-conditioning intelligence control energy conserving system.
The utility model comprises power supply, frequency converter, fuzzy controller, external PID controller, PLC controller, gauge tap, touch-screen, switching value input, data acquisition unit, Switching Power Supply; Described power supply is connected with gauge tap, PLC controller, Switching Power Supply, Switching Power Supply is connected with switching value input, touch-screen, external PID controller, data acquisition unit respectively, described PLC controller links to each other with gauge tap, gauge tap is connected with frequency converter, simultaneously, frequency converter, touch-screen are attached thereto by the communication interface on the PLC controller, and the switching value input is connected with the PLC controller, and data acquisition unit is connected with external PID controller; Indicator lamp and warning circuit link to each other with the PLC controller; It is characterized in that, described PLC controller inside is provided with fuzzy controller, external PID controller comprises temperature PID controller and pressure P ID controller, data acquisition unit comprises temperature collecting cell and pressure acquisition unit, the output signal of external PID controller is sent into fuzzy controller, is optimized the frequency converter of sending into central air conditioner system after the calculation process again by fuzzy controller.
Described PLC controller is connected with control switch, and control switch is controlled the frequency converter of chilled water pump and cooling water pump respectively, and control switch constitutes frequency convertor system and the interlocking coexistence of power frequency system by interlock circuit.
Described interlock circuit is made up of several groups of control switches and normally closed point thereof, and the control switch of freezing frequency converter is connected with the normally closed point of cooling frequency converter; Each is freezing, the control switch of cooling water pump is freezing with other three, normally closed some cooling water pump is connected.
Described inverter output terminal is connected with water pump respectively by one group of gauge tap, and this group gauge tap links to each other with the PLC controller by another group gauge tap.
The utility model course of work is as follows: at first initialization system moves optimal parameter, gather external temperature and pressure signal, external PID controller compares according to the size of outside actual temperature signal and pressure signal and the size of given temperature signal and pressure signal, obtain temperature signal and pressure signal by the PID computing, analyze corresponding frequency converter running frequency.Then, external PID controller is with the frequency values that calculates, and temperature value and force value together send fuzzy controller to.Fuzzy controller at first calculates temperature approach and pressure difference size according to the size of temperature signal and pressure signal, obtain temperature control and pressure controlled weights coefficient by inquiring about the good fuzzy query table of inner storage in advance then, obtain the optimum operation frequency values of frequency converter by ranking operation, send frequency converter to, the flow of central air-conditioning is controlled.
The mode that the utility model adopts external PID control and fuzzy control technology to combine, by temperature signal and pressure signal to central air-conditioning carry out comprehensively, optimal control, make central air-conditioning operate in optimum Working, realize farthest energy-conservation.The utility model has adopted the Automatic Control technology, does not need artificially to be interfered, and system realizes regulating according to load condition automatically, and is very easy to use.
Description of drawings
Fig. 1 is the utility model entire system block diagram;
Fig. 2 is the PLC controller of embodiment and the connection layout of input switch, external PID controller, data acquisition unit and touch-screen;
Fig. 3 is the gauge tap wiring diagram of embodiment;
Fig. 4 is frequency converter, water pump and the former power frequency system wiring figure of embodiment.
The specific embodiment
Embodiment:
The utility model is described in further detail below in conjunction with drawings and Examples.
With reference to accompanying drawing 1:
Present embodiment power supply 1 is connected with gauge tap 2, PLC controller 3, Switching Power Supply 4, Switching Power Supply 4 is connected with switching value input 5, touch-screen 6, external PID controller 7, data acquisition unit 8 respectively, described PLC controller 3 links to each other with gauge tap 2, gauge tap 2 is connected with frequency converter 10, simultaneously, frequency converter 9, touch-screen 6 are attached thereto by the communication interface on the PLC controller 3, and switching value input 5 is connected with PLC controller 3, and data acquisition unit 8 is connected with external PID controller 7; PLC controller 3 inside are provided with fuzzy controller 10, and external PID controller 7 links to each other with fuzzy controller 10, and indicator lamp and warning circuit 11 link to each other with PLC controller 3.Present embodiment PLC controller 3 adopts the DAP-48EH type, and the temperature acquisition card of data acquisition unit 8 adopts 04DP, and the pressure acquisition card adopts 04AD, and touch-screen 6 adopts the PWS1711-S type, and frequency converter 9 adopts Huifeng F1500-P type.
With reference to accompanying drawing 2:
The working power AC220V of PLC controller 3 is through transformer isolation, and key switch SB1, SB2 and auxiliary reclay KA01 constitute the whole o-volt protection of electric control system; HL01, HL02 signal lamp are respectively the demonstration that powers on of power supply 1, PLC controller 3; This part and prior art are similar.Control switch SA1 (L0) and SA2 (L2) control frequency converter 9-1, the 9-2 of chilled water pump and cooling water pump respectively.The communication interface of PLC controller 3 (RS-485) 2-1 is connected with the COM1 of frequency converter 9-1,9-2 respectively, another communication interface 2-2 is connected with the COM2 of touch-screen 6, simultaneously, PLC controller 3 links to each other with temperature acquisition card 04PT, pressure acquisition card 04AD, temperature acquisition card 04PT, pressure acquisition card 04AD respectively with external temp PID controller 7-1, the corresponding connection of external pressure P ID controller 7-2, PLC controller 3 is connected with frequency converter 9-1,9-2.Control switch SA4 and SA5 are used for being provided with the operational mode (freeze or heat) of central air-conditioning.When the acyclic operation of central air-conditioning, control switch SA6, SA7, SA8, SA9 control the operation of chilled water pump 1#, 2#, 3#, 4# respectively, and control switch SA10, SA11, SA12, SA13 control the operation of cooling water pump respectively.When central operation of air conditioner during at circulating working mode, be operation by PLC instruction control chilled water pump and cooling water pump, control switch SA6, SA7, SA8, SA9, SA10, SA11, SA12, SA13 are inoperative.PLC controller 3 switching values are imported 5 X16, and X17 is used for controlling the operation of central air-conditioning blower fan.At the outlet side of PLC controller 3, KA1, KA2, KA3, KA4, KA5, KA6, KA7, KA8 are middle output stage, are used for controlling the operation of frequency converter 9-1,9-2.
With reference to accompanying drawing 3:
The present embodiment chilled water pump has four, but freezing work frequency converter 9-1 only has one, and synchronization can only make wherein chilled water pump work, so must carry out circuit interlock.After control switch KA0 opened, frequency converter 9-1 powered on and prepares operation.Control switch KA1 is open-minded, and the normally closed point of KM1 disconnects, and constitutes interlock circuit by control switch KA1, KA2, KA3 and KA4, the chilled water pump 1# converting operation that powers on, but chilled water pump 2#, 3# and 4# disconnect, and these three water pumps are not worked.In like manner, when wherein arbitrary chilled water pump worked, other three chilled water pumps are quit work by interlock circuit.After control switch KA5 opened, cooling was with the frequency converter 9-2 preparation that powers on.Constitute interlock circuit by control switch KA6, KA7, KA8 and KA9, guarantee synchronization frequency converter 9-2 only to wherein cooling water pump power supply, and other three cooling water pumps quit work.Wherein, HL01, HL02, HL1, HL2, HL3, HL4, HL5, HL6, HL7, HL8 be respectively coil KM01, KM02, KM1, KM2, KM3, KM4, KM5, KM6, KM7, KM8 electric demonstration.KM01, KM2, KM3, KM4, KM5, KM6, KM7, KM8 are frequency-variable controller, constitute and the work frequency circuit interlocking, when central air-conditioning converting operation, forbid the chilled water pump and the cooling water pump power frequency operation of central air-conditioning.
With reference to accompanying drawing 2,3,4:
The AC380V power supply is by circuit breaker Q F1 and gauge tap KM01 input converter 9-1,9-2 input, and frequency converter 9-1,9-2 work order and working status parameter are carried out communication by RS-485 communication port on frequency converter 9-1, the 9-2 and PLC controller 3.Control switch SA21, SA22, SA23, SA24, SA25, SA26, SA27, SA28 are respectively startup, the operation conversion interlock of the soft start power frequency 4-3 of system.Freezingly be used for controlling chilled water pump 1#4-1,2#, 3#, 4#4-2 operation respectively by gauge tap KM1, KM2, KM3 and KM4 with frequency converter 9-1 output.The control signal of gauge tap KM1, KM2, KM3 and KM4 is sent by gauge tap KA1, KA2, KA3 and KA4 among Fig. 2 by PLC controller 3.The cooling of central air-conditioning is similar to refrigeration system with frequency converter 9-2 system wiring, passes through K switch A5, KA6, KA7 and KA8 gauge tap KM5, KM6, KM7 and KM8 by PLC controller 3.When being in power frequency operation, control switch SA1, SA2 is disconnected with soft start loop lock, when being transformed into the alternative operation of power frequency, these control switches disconnect PLC controller 3 power on loop and power control loop, and the operation controller KM11 of power frequency system, KM12, KM13, KM14, KM21, KM22, KM23, KM24 disconnects frequency-variable controller KM01, KM2, KM3, KM4, KM5, KM6, KM7, the control power supply of KM8, to guarantee that synchronization only has a system works, power frequency system and frequency conversion system are lived in peace with each other, the interlocking coexistence, control is reliable, easy to operate, need not to remove original power frequency and once export.
Claims (4)
1, a kind of central air-conditioning intelligence control energy conserving system comprises power supply, frequency converter, fuzzy controller, external PID controller, PLC controller, gauge tap, touch-screen, switching value input, data acquisition unit, Switching Power Supply; Described power supply is connected with gauge tap, PLC controller, Switching Power Supply, Switching Power Supply is connected with switching value input, touch-screen, external PID controller, data acquisition unit respectively, described PLC controller links to each other with gauge tap, gauge tap is connected with frequency converter, frequency converter, touch-screen are attached thereto by the communication interface on the PLC controller, the switching value input is connected with the PLC controller, and data acquisition unit is connected with external PID controller; Indicator lamp and warning circuit link to each other with the PLC controller; It is characterized in that, described PLC controller inside is provided with fuzzy controller, external PID controller comprises temperature PID controller and pressure P ID controller, data acquisition unit comprises temperature collecting cell and pressure acquisition unit, the output signal of external PID controller is sent into fuzzy controller, is optimized the frequency converter of sending into central air conditioner system after the calculation process again by fuzzy controller.
2, central air-conditioning intelligence control energy conserving system according to claim 1, it is characterized in that, described PLC controller is connected with control switch, and control switch is controlled the frequency converter of chilled water pump and cooling water pump respectively, and control switch constitutes frequency convertor system and the interlocking coexistence of power frequency system by interlock circuit.
3. energy conserving system according to claim 2 is characterized in that, described interlock circuit is made up of several groups of control switches and normally closed point thereof, and the control switch of freezing frequency converter is connected with the normally closed point of cooling frequency converter; Each control switch freezing, but water pump is connected with other three normally closed points freezing, but water pump.
4, central air-conditioning intelligence control energy conserving system according to claim 1 is characterized in that, described inverter output terminal is connected with water pump respectively by one group of gauge tap, and this group gauge tap links to each other with the PLC controller by another group gauge tap.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620050122 CN2867190Y (en) | 2006-02-28 | 2006-02-28 | Central air conditioning intelligence control energy-saving system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620050122 CN2867190Y (en) | 2006-02-28 | 2006-02-28 | Central air conditioning intelligence control energy-saving system |
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| CN2867190Y true CN2867190Y (en) | 2007-02-07 |
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| CN 200620050122 Expired - Fee Related CN2867190Y (en) | 2006-02-28 | 2006-02-28 | Central air conditioning intelligence control energy-saving system |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101881498B (en) * | 2009-05-06 | 2012-11-14 | 欧威尔空调科技(中国)有限公司 | Multiple connected air conditioning system and control method thereof |
| CN105627529A (en) * | 2016-03-31 | 2016-06-01 | 西安建筑科技大学 | Air conditioner control system and method based on variable speed integral PID type iterative learning algorithm |
| CN105782047A (en) * | 2015-12-30 | 2016-07-20 | 无锡市迪卡瑞控制技术有限公司 | Controller and control method for fuzzy control over screw air compressor |
| CN109612055A (en) * | 2018-12-14 | 2019-04-12 | 天津大学 | A kind of feedforward fuzzy control method of air-conditioner water system |
-
2006
- 2006-02-28 CN CN 200620050122 patent/CN2867190Y/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101881498B (en) * | 2009-05-06 | 2012-11-14 | 欧威尔空调科技(中国)有限公司 | Multiple connected air conditioning system and control method thereof |
| CN105782047A (en) * | 2015-12-30 | 2016-07-20 | 无锡市迪卡瑞控制技术有限公司 | Controller and control method for fuzzy control over screw air compressor |
| CN105782047B (en) * | 2015-12-30 | 2019-02-12 | 无锡市艾克特电气股份有限公司 | A kind of controller and control method of blurring control screw air compressor |
| CN105627529A (en) * | 2016-03-31 | 2016-06-01 | 西安建筑科技大学 | Air conditioner control system and method based on variable speed integral PID type iterative learning algorithm |
| CN105627529B (en) * | 2016-03-31 | 2018-07-31 | 西安建筑科技大学 | Air-conditioner control system and method based on PID controller with changing integration rate type Iterative Algorithm |
| CN109612055A (en) * | 2018-12-14 | 2019-04-12 | 天津大学 | A kind of feedforward fuzzy control method of air-conditioner water system |
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| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |