CN102878635B - Intelligent energy-saving control system of combined air conditioner and control program thereof - Google Patents

Abstract

The invention discloses an intelligent energy-saving control system of a combined air conditioner and a control program of the combined air conditioner. The control system comprises a temperature transmitter, a controller, an expansion module, a driving circuit, a touch screen, an equipment cabinet and a remote monitoring system. The control program comprises the following program flows: a temperature sampling and converting program flow, a three basic mode judgment program flow, a control setting parameter program flow under three basic modes, a logic control main program flow, an air volume control subprogram flow under three basic modes, a control setting parameter second-level subprogram flow under precooling and preheating modes, a water valve control setting parameter second-level subprogram flow and a failure detection program flow. The system has the following beneficial effects of novel idea, reasonable design, regular process, industrialized mass production, obvious economic benefit and the like. The intelligent energy-saving control system and the control program of the combined air conditioner provided by the invention can be widely applied in the fields of large stations, harbors, hospitals, colleges and the like.

Description

A kind of packaged air conditioner intelligent energy-saving control system and control program thereof

Technical field

The present invention relates to a kind of assembled air-conditioner control system and control program, particularly relate to a kind of packaged air conditioner intelligent energy-saving control system and control program thereof.

Background technology

There is following drawback in conventional ASSEMBLE air-conditioner VFC:

1, most of packaged air conditioner does not have pattern automatic decision function, only with date in month or supply water temperature automatic decision, this pattern just can not change once setting, in fixing refrigeration, heating in the phase due to the temperature of cataclysm can not automatic mode switch, cause indoor temperature too low or too high, can not meet air-conditioning comfort temperature like this wastes energy consumption again.。

2, during conventional ASSEMBLE air-conditioner variable frequency adjustment air output, be all to compare the controlled quentity controlled variable calculating output one 0 ~ 100% (0 ~ 20mA) between return air temperature and setting upper and lower region, then this controlled quentity controlled variable to Frequency Converter Control pressure fan.In actual air-conditioning uses, air output is unallowed very little, must ensure the primary demand of air output.Traditional packaged air conditioner Frequency Converter Control only can arrange the primary demand that lower proportion ratio restriction meets air output in frequency converter.

3, conventional ASSEMBLE air-conditioner pressure fan switch board Dou Shi producer carries, the equipment such as sensor, air-valve, water valve of a set of air-conditioner is all complete examination and controlling by BAS (building automation system), so not only increase the weight of BAS (building automation system) construction burden but also compare dispersion, inconvenience is keeped in repair, the disadvantages such as management difficulty is large after causing.

4, conventional ASSEMBLE air-conditioner man-machine interface (touch-screen) is all for monitoring interface with word, numeral, colour switching, figure is also the simple graph carried with touch-screen programming software, whole interface is more dull, if imaging industrial computer or the same high-resolution motion graphics of computer are done in interface, touch-screen cannot realize at all.

In view of above-mentioned defect, existing packaged air conditioner frequency-changing control system cannot meet the demand in market.

Summary of the invention

The object of the invention is the deficiency in order to overcome above-mentioned background technology, researching and developing with great concentration through the applicant, repetition test, and a kind of packaged air conditioner intelligent energy-saving control system that can meet consumer demand is provided.

A kind of packaged air conditioner intelligent energy-saving control system provided by the invention, comprise temperature transmitter, rack, controller, expansion module, drive circuit, touch-screen and long distance control system, described expansion module comprises the first Analog input mModule, the second Analog input mModule and analog output module, one end of first Analog input mModule is connected with controller by the first external bus connector, and the other end is connected with analog output module, the second Analog input mModule with the 3rd external bus interface successively by the second external bus connector; Described temperature transmitter comprises wind pushing temperature transmitter, return air temperature transmitter, new air temperature transmitter, supply water temperature transmitter; Described wind pushing temperature transmitter, return air temperature transmitter, new air temperature transmitter are separately positioned on the return air inlet of air outlet air-conditioner, the fresh wind port of air-conditioner of air-conditioner, and described temperature transmitter is connected with the first Analog input mModule by shielded signal line; Described supply water temperature transmitter is arranged on water supply line; Described controller has two interfaces and RS-485P1 communication interface and RS-485P0 communication interface, and P1 communication interface is connected with touch-screen by communication cable; P0 communication interface is connected with long distance control system by Modbus-RTU communications protocol; Described controller is connected with I/O follower one end and I/O loader one end respectively by internal bus; Described I/O follower is connected with drive circuit by shielded signal line respectively with the other end of I/O loader; Described drive circuit comprises pressure fan drive circuit, return fan drive circuit, air returning valve drive circuit, new air-valve drive circuit, exhaust valve drive circuit, water valve drive circuit and runner drive circuit, establishes pressure fan frequency conversion tank and be connected with pressure fan by wire in described pressure fan drive circuit; Establish return fan frequency conversion tank in described return fan drive circuit and be connected with return fan by wire; Described air returning valve drive circuit comprises the air returning valve and air returning valve motor that are connected by wire; Described new air-valve drive circuit comprises the new air-valve and new air-valve motor that are connected by wire; Described exhaust valve drive circuit comprises the exhaust valve and exhaust valve motor that are connected by wire, is provided with exhaust outlet outside exhaust valve; Described runner drive circuit comprises the runner motor and runner that are connected by wire; Wherein air returning valve drive circuit, new air-valve drive circuit, exhaust valve drive circuit and water valve drive circuit are connected with analog output module, the second Analog input mModule respectively by shielded signal line, and pressure fan drive circuit and return fan drive circuit are connected with analog output module respectively by shielded signal line; Described rack inwall is provided with new wind filter screen pressure difference switch, return air filter screen pressure difference switch and surface cooler, new wind filter screen pressure difference switch and return air filter screen pressure difference switch are respectively equipped with new wind filter screen and return air filter screen, and the outer wall of described rack is provided with return air manual modulation valve and air-supply manual modulation valve; The two ends of described surface cooler are connected with the water valve of supply water temperature transmitter and water valve drive circuit respectively by water supply line; Described new wind filter screen pressure difference switch is connected with I/O loader respectively by shielded signal line with return air filter screen pressure difference switch.

The control program of a kind of packaged air conditioner intelligent energy-saving control system provided by the present invention, described control program comprises following program circuit:

Step one, temperature sampling conversion program flow process;

Step 2, three kinds of basic model determining program flow processs;

Step 3, three kinds of basic models control setup parameter program circuit;

Step 4, logic control main program flow;

Boiler pressure control subroutine flow under step 5, three kinds of basic models;

Setup parameter second order subroutine flow process is controlled under step 6, precooling, preheating mode;

Step 7, water valve control setup parameter second order subroutine flow process;

Step 8, fault detection program flow process;

Described temperature conversion program flow process is as follows:

Temperature transmitter becomes air-supply, return air, new wind, supply water temperature the analog input register that electric signals sends into programmable logic controller (PLC) PLC, be the temperature value of actual change by the sample conversion Program transformation in PLC, judge for program, calculate and show at touch-screen;

A, PLC main program that powers on performs connection first scan period SM0.1 instruction, connect ATCH interrupt function block instruction, to interruption INT_0 assignment: setting interrupt event is Interruption 0, the time interval special storage device SMB34=100ms of setting Interruption 0, allows the overall situation to open interruption;

B, as timer SMB34=100ms disconnecting INT_0, keep the scene intact, connect interrupt event service routine, otherwise continue to perform main program;

C, in interrupt event service routine, setting counter C0=50, each interrupt occurrence count device adds 1, and preserve count value, after full 50 times of meter, air-supply, return air, new wind, supply water temperature are sampled and sampled value is kept in the register of PLC, reset counter C0 restoring scene and return interrupt service routine, program is with a sampling time of 5S, air-supply, return air, new wind, supply water temperature are sampled simultaneously, constantly refresh the value of a front register, keep last freshness value;

After D, Sampling interrupt return main program, performing each scan period connects SM0.0 instruction, call sample temperature conversion routine, the air-supply of preservation, return air, new wind, supply water temperature are refreshed sampled value at every turn and carry out temperature transition by subprogram, conversion routine sample magnitude 0 ~ 32000, be measuring tempeature show value, also be that input 0 ~ 10V signal of telecommunication changed is sent in the change of corresponding external temperature, the temperature value of air-supply, return air, new wind, supply water temperature is kept in PLC register respectively, and shows on the touchscreen;

Three kinds of described basic model determining program flow processs are as follows:

After described temperature sampling conversion program flow performing, the difference of the new wind converted and supply water temperature and setting value being made comparisons judges to freeze, ventilates, heats Three models;

A, perform each scan period and connect SM0.0 instruction all the time, transmit customer data base and judge default value, when default value with actual judge there is deviation time, can be revised by touch-screen, modified values feeding PLC register invocation pattern judges subprogram;

B, program for Three models basis for estimation, improve the stability of a system by delay judgement with new air temperature-supply water temperature=temperature difference △ t;

C, Program time delay 10S, when △ t be greater than judge refrigeration mode setting default value 17 DEG C time, be judged as refrigeration, otherwise return;

D, Program time delay 10S, judge heating mode default value-27 DEG C when △ t is less than, be judged as heating, otherwise return;

E, Program time delay 10S, be judged as between the two ventilating when △ t is in, otherwise return;

F, pattern once determine, touch-screen display mode;

Described Three models controls setup parameter subroutine flow and is described as follows:

After described step one and step 2 perform, under pattern acknowledgement state, call different control setup parameter subprogram respectively, carry out parameter assignment for later rate-determining steps and prepare:

A, call refrigeration mode setup parameter when program is judged as refrigeration mode, the one group of default parameter value being placed on customer data base is in advance sent into PLC register by program respectively, concrete default parameters: the pressure fan rotating speed upper limit 100%, pressure fan lower rotation speed limit 70%, the return air temperature upper limit 28 DEG C, return air temperature lower limit 22 DEG C, water valve 100% aperture, air returning valve 100% aperture, new air-valve 35% aperture, exhaust valve 35% aperture.If when this group default parameters and working control run and have deviation, refreshed by touch-screen amendment error set point and be kept in the register of PLC, if zero deflection terminates call subroutine return main program;

B, call air vent mode setup parameter when program is judged as air vent mode, the one group of default parameter value being placed on customer data base is in advance sent in the register of PLC by program respectively, concrete default parameters: the return air temperature upper limit 26 DEG C, return air temperature lower limit 24 DEG C, water valve 0% aperture, air returning valve 100% aperture, new air-valve 100% aperture, exhaust valve 100% aperture.If this group default parameters and working control run when having a deviation, error set point can be revised by touch-screen equally and refresh and be kept in the register of PLC, if zero deflection terminates call subroutine return main program;

C, call heating mode setup parameter when program is judged as heating mode, the one group of default parameter value being placed on customer data base is in advance sent in the register of PLC by program respectively, concrete default parameters: the pressure fan rotating speed upper limit 100%, pressure fan lower rotation speed limit 70%, the return air temperature upper limit 24 DEG C, return air temperature lower limit 18 DEG C, water valve 100% aperture, air returning valve 100% aperture, new air-valve 35% aperture, exhaust valve 35% aperture.If this group default parameters and working control run when having a deviation, error set point can be revised by touch-screen equally and refresh and be kept in the register of PLC, if zero deflection terminates call subroutine return main program;

Described logic control main program program circuit is as follows:

Perform above-mentioned step one to three after, next how chain logic start and stop air-conditioner device, specific procedure is as follows:

After A, pattern are determined, the control setup parameter subprogram different according to different mode invocations;

After B, program accept starting-up signal, connect water valve and air returning valve, and the setting aperture signal of telecommunication is sent into water valve, air returning valve respectively;

After C, Program time delay 5S, then connect new air-valve and exhaust valve, and the setting aperture signal of telecommunication is sent into new air-valve, exhaust valve respectively;

After D, Program time delay 60S, whether Programmable detection water valve open degree feedback has feedback, if there is no feedback signal, connect alarm, program is standby and record water valve fault time, if have feedback signal program to detect other air returning valves, newly air-valve, exhaust valve open degree feedback more whether have feedback, if do not have feedback to perform process signal above equally just connect the warning also record trouble time, if having feedback touch-screen display aperture and enter next step;

E, program, by above-mentioned open degree feedback signal detection, under situation is all opened in confirmation, connect pressure fan run signal, time delay 5S connects return fan run signal again, if normal operation, operation feedback is passed to touch-screen display, otherwise program is awaited orders and alarm logging;

After F, pressure fan, return fan normal operation, routine call Boiler pressure control subprogram;

G, after Boiler pressure control subprogram returns, follow pressure fan controlled quentity controlled variable with return fan and drive pressure fan, return fan converting operation, touch-screen display air quantity, time delay 30S, run Program and detect water valve all the time, air returning valve, new air-valve, the aperture situation of exhaust valve, whether delay judgement all valve areas feedback is consistent with setting, if wherein any one air-valve is inconsistent, out-of-blast machine and return fan run at once, warning is awaited orders and is recorded this equipment fault time, program also detects pressure fan and return fan operation conditions simultaneously, fault-signal is had once detection pressure fan or return fan, at once out of service and alarm logging fault, so constantly cycle detection is until normal shutdown,

H, system closedown first out-of-blast machine, return fan, closes water valve after time delay 10S, then closes all air-valves after time delay 5S, until EP (end of program) when water valve, air-valve are fed back to 0;

Under described Three models, Boiler pressure control subroutine flow is as follows:

After step 4 described in execution, in chain unlatching pressure fan, return fan situation, call Boiler pressure control subprogram, under deterministic model, regulate pressure fan frequency converter rotating speed with return air temperature change, realize variable air rate energy-saving run, concrete Boiler pressure control divides refrigeration, ventilates, heats;

Refrigeration Boiler pressure control subroutine flow illustrates:

A, call refrigeration mode Boiler pressure control subprogram, if return air temperature is between setting district within the scope of 22 ~ 28 DEG C, return air temperature proportional linearity correspondence 70 ~ 100% controlled quentity controlled variable drives pressure fan frequency control operation and return fan follows pressure fan air quantity;

B, subprogram calculate the restriction of air output method adoption rate adjustment+condition, refrigeration functional expression y=70+Kx (△ t), wherein, and y-air output, x (△ t)-temperature difference amount;

Proportionality constant

Refrigeration $K=\frac{100-70}{28-22}=5,$

X (△ t)=return air temperature-design temperature lower limit in formula;

After C, time delay 2S when return air temperature is greater than capping 28 DEG C, air quantity exports with 100%, time delay 5 minutes, if discharge quantity of fan or 100% exports, system is judged as precooling pattern, and call precooling Schema control setup parameter subprogram, readjust water valve, air returning valve, new air-valve, exhaust valve aperture;

After D, time delay 2S when return air temperature is less than setting lower limit 22 DEG C, air output exports with 70%, time delay 5 minutes, if discharge quantity of fan or 70% exports, system is from determining water yield variable air rate changed variable water volume quantitative wind control into originally, and system still keeps 70% air quantity, the water valve called under this pattern controls setup parameter subprogram, control setting value assignment to water valve, by the aperture of wind pushing temperature change proportional water valve, water valve aperture 0 ~ 100% exports;

Ventilation volume controls subroutine flow and illustrates:

A, call air vent mode Boiler pressure control subprogram, if return air temperature is between setting district within the scope of 24 ~ 26 DEG C, return air temperature proportional linearity correspondence 70 ~ 90% controlled quentity controlled variable drives pressure fan frequency control to run, and return fan follows pressure fan air quantity;

After B, time delay 2S when return air temperature is greater than capping 26 DEG C, the air quantity of pressure fan and return fan exports with 100%;

After C, time delay 2S when return air temperature is less than setting lower limit 24 DEG C, the air quantity of pressure fan and return fan exports with 70%;

Heat Boiler pressure control subroutine flow to illustrate:

A, call heating mode Boiler pressure control subprogram, if return air temperature is between setting district within the scope of 18 ~ 24 DEG C, return air temperature proportional linearity correspondence 100 ~ 70% controlled quentity controlled variable drives pressure fan frequency control operation and return fan follows pressure fan air quantity;

B, subprogram calculate the restriction of air output method adoption rate adjustment+condition, heat functional expression y=100-K.x (△ t), wherein, and y-air output, x (△ t)-temperature difference amount;

Proportionality constant

Refrigeration $K=\frac{100-70}{24-18}=5,$

X (△ t)=return air temperature-design temperature lower limit in formula.

After C, time delay 2S when return air temperature is less than setting lower limit 18 DEG C, the air quantity of pressure fan and return fan exports with 100%, time delay 5 minutes, if discharge quantity of fan or 100% exports, system is judged as preheating mode, and call preheating mode control setup parameter subprogram, readjust the aperture of water valve, air returning valve, new air-valve and exhaust valve;

After D, time delay 2S when return air temperature is greater than capping 24 DEG C, the air output of pressure fan and return fan exports with 70%, time delay 5 minutes, if discharge quantity of fan or 70% exports, system is from determining water yield variable air rate changed variable water volume quantitative wind control into originally, system still keeps 70% air quantity, and the water valve called under this pattern controls setup parameter subprogram, exports according to wind pushing temperature change proportion adjustment water valve aperture 0 ~ 100%;

Setup parameter second order subroutine flow process is controlled as follows under described precooling, preheating mode:

A, in refrigeration, heat under two pattern Boiler pressure control subprograms control, if discharge quantity of fan or 100% output, system delay is judged as precooling or preheating mode;

B, call precooling, warm-up control setup parameter second order subroutine respectively, again assignment water valve, air returning valve, new air-valve, exhaust valve aperture, precooling, preheating default value: air output 100%, water valve aperture 100%, air returning valve aperture 100%, new valve area 0%, exhaust valve aperture 0%;

If when C default value and working control have a deviation, can be revised by touch-screen, be kept at after refreshing in PLC register, return higher level's subprogram and again drive and perform water valve, aperture that air-valve is new;

It is as follows that described water valve controls setup parameter second order subroutine flow process:

A, in refrigeration, heat under two pattern Boiler pressure control subprograms control, if discharge quantity of fan or 70% exports, system is determined water yield variable air rate changed variable water volume quantitative wind control into from original;

B, call water valve respectively and control setup parameter second order subroutine, refrigeration default value: the water valve aperture upper limit 100%, aperture lower limit 0%, the wind pushing temperature upper limit 25 DEG C, wind pushing temperature lower limit 15 DEG C; Heat default value: the water valve aperture upper limit 100%, aperture lower limit 0%, the wind pushing temperature upper limit 45 DEG C, wind pushing temperature lower limit 35 DEG C;

If when C default value and working control have a deviation, can be revised, be kept at the register of PLC after refreshing, return higher level's subprogram by touch-screen, system is with wind pushing temperature change proportion adjustment water valve 0 ~ 100% aperture;

Fault detection program flow process is as follows:

After step 4 to seven described in system performs, each scan period checkout equipment running status, specific procedure is as follows:

After A, pressure fan, return fan converting operation, the time delay of each scan period detects water valve, air returning valve, new air-valve, exhaust valve aperture, when water valve aperture and setting value inconsistent time, alarm logging fault, but do not shut down.When air returning valve, new air-valve, any one aperture of exhaust valve and setting value are inconsistent, alarm logging fault halt system run, if unanimously, and touch-screen display aperture.

After B, pressure fan, return fan converting operation, each scan period detects pressure fan, return fan running status, has fault once detection, and halt system runs and alarm logging content fault time at once.

After C, pressure fan, return fan converting operation, each scan period time delay detects new wind, whether return air filter screen pressure difference switch is connected, once there be connection signal system not shut down, and alarm logging content fault time.

Operation principle of the present invention: composition graphs 1 to Fig. 2 is described below: temperature transmitter carries out temperature sampling to air-supply, return air, new wind periodical feeding, and by these signals of telecommunication (0 ~ 10V) by shielded signal line input EM231 first Analog input mModule 7-1, after the inner analog/digital conversion of the first Analog input mModule 7-1, again temperature signal (0 ~ 10V) is converted to the numerical value (0 ~ 3200) that controller inside identifies, by external bus connector, described numerical value (0 ~ 3200) is kept in the input register of controller.When after reception starting-up signal, controller sends chain power-on command by internal bus to I/O follower, power-on command connects the inner corresponding soft relay of I/O follower respectively, and each soft relay drives corresponding each equipment (i.e. pressure fan, return fan, air returning valve, new air-valve, exhaust valve, water valve etc.) start to run again.Meanwhile, controller controls numerical value (0 ~ 3200) by external bus connector the rotating speed of the aperture of water valve, air returning valve, new air-valve, exhaust valve and pressure fan, return fan, EM232 analog output module is inputted from the output register of controller, numerical value (0 ~ 3200) is after the inner D/A switch of EM232 analog output module, these signals of telecommunication (Setting signal 0 ~ 10V) are driven water valve, (return, newly, arrange) air-valve execution aperture, frequency Setting signal 0 ~ 20mA drives pressure fan, return fan converting operation.The energy-saving run feedback of pressure fan, return fan, bypass run feedback, energy-conservation fault is fed back, motor overload feedback passes to I/O loader, are feeding back to controller PLC by internal bus.In like manner, the open degree feedback of water valve, (new, return, row) air-valve, run feedback and pass to the second Analog input mModule 7-2, feed back to PLC through the inner analog/digital conversion of the second Analog input mModule 7-2, external bus connector.

Packaged air conditioner intelligent energy-saving control system of the present invention, there is following beneficial effect: packaged air conditioner intelligent energy-saving control system, adopt programmable logic controller (PLC) PLC and person-computer union to be that core controls, drive pressure fan, return fan in air-conditioner to realize frequency conversion variable air volume running.Intelligent energy-saving control system carries out temperature acquisition to air-supply, return air, new wind, periodical feeding temperature respectively, 0 ~ 10V analog signals is sent into input expansion module, after the conversion of PLC program samples, these signal synthesis compared, analyzes, calculate and the different regime mode of automatic decision, under different mode controls, reasonably export different air output, return air amount and the different opening such as air-valve, water valve, thus reach for the purpose of synthesis energy saving.The present invention adopts hardware and software to combine, and has good air-conditioner temperature effect and energy-saving effect; Man-machine interface is in kind for graphical interfaces with air-conditioner, the state such as imitation pressure fan true to nature, return fan, air-valve, water valve operation, simple to operate, one-touch start, setup parameter cryptoguard, built-in default value, does not need professional to set, and a set of air-conditioner all devices can be integrated into a mini system; Possesses RS-485 interface, the very convenient and local and remote watch-dog communication by Modbus-RTU communications protocol; There is novel, reasonable in design, technological specification, the feature such as industrialized mass production, remarkable in economical benefits can be formed.The present invention can be widely used in the fields such as large-scale station, harbour, hotel, hospital, universities and colleges.

Accompanying drawing explanation

Fig. 1 is packaged air conditioner Energy Saving Control drawing;

Fig. 2 is packaged air conditioner energy-saving control system figure;

Fig. 3 is temperature interrupt sample conversion subroutine flow chart;

Fig. 4 is mode decision subroutine flow chart;

Fig. 5 is logic control main program flow chart;

Fig. 6 is that Three models controls setup parameter subroutine flow chart;

Fig. 7 is refrigeration mode Boiler pressure control subroutine flow chart;

Fig. 8 is air vent mode Boiler pressure control subroutine flow chart;

Fig. 9 is heating mode Boiler pressure control subroutine flow chart;

Figure 10 is precooling, warm-up control setup parameter subroutine flow chart;

Figure 11 is that water valve controls setup parameter subroutine flow chart;

Figure 12 is refrigeration functional arrangement;

Figure 13 is for heating functional arrangement.

Detailed description of the invention

Below in conjunction with drawings and Examples, the present invention is described in further detail, but this embodiment should not be construed as limitation of the present invention.

Embodiment 1

See Fig. 1 to Fig. 2, packaged air conditioner intelligent energy-saving control system of the present invention, comprises temperature transmitter, rack 44, controller 5, expansion module, drive circuit, touch-screen 1 and long distance control system 2.

Described expansion module comprises the first Analog input mModule 7-1, second Analog input mModule 7-2 and analog output module 8, one end of first Analog input mModule 7-1 is connected with controller 5 by the first external bus connector 6-1, the other end by the second external bus connector 6-2 and the 3rd external bus interface 6-3 successively with analog output module 8, second Analog input mModule 7-2 is connected, in the present embodiment, first Analog input mModule 7-1 and the second Analog input mModule 7-2 is EM231 expansion module, analog output module 8 is EM232 expansion module.Described temperature transmitter is connected with the first Analog input mModule 7-1 by shielded signal line.Described controller 5 is had two interfaces and RS-485P1 communication interface 3 and RS-485P0 communication interface 4, P1 communication interface 3 and is connected with touch-screen 1 by communication cable; P0 communication interface 4 is connected with long distance control system 2 by Modbus-RTU communications protocol; Described controller 5 is connected with I/O follower 9 one end and I/O loader 10 one end respectively by internal bus, and in the present embodiment, described controller 5 is siemens PLC CPU226 programmable logic controller (PLC) PLC; Described touch-screen 1 is man-machine interface MT4403T touch-screen.Described I/O follower 9 is connected with drive circuit by shielded signal line respectively with the other end of I/O loader 10.Described drive circuit comprises pressure fan drive circuit 15, return fan drive circuit 17, air returning valve drive circuit 19, new air-valve drive circuit 21, exhaust valve drive circuit 23, water valve drive circuit 25 and runner drive circuit 27; Wherein air returning valve drive circuit 19, new air-valve drive circuit 21, exhaust valve drive circuit 23 and water valve drive circuit 25 are connected with analog output module 8, second Analog input mModule 7-2 respectively by shielded signal line, pressure fan drive circuit 15 and return fan drive circuit 17 are connected with analog output module 8 respectively by shielded signal line, in the present embodiment, establish pressure fan frequency conversion tank in described pressure fan drive circuit 15 and be connected with pressure fan 16 by wire; Establish return fan frequency conversion tank in described return fan drive circuit 17 and be connected with return fan 18 by wire; Described air returning valve drive circuit 19 comprises the air returning valve 20 and air returning valve motor 35 that are connected by wire; Described new air-valve drive circuit 21 comprises the new air-valve 22 and new air-valve motor 32 that are connected by wire; Described exhaust valve drive circuit 23 comprises the exhaust valve 24 and exhaust valve motor 35 that are connected by wire, is provided with exhaust outlet 40 outside exhaust valve 24; Described runner drive circuit 27 comprises the runner motor 28 and runner 34 that are connected by wire.Described rack 44 inwall is provided with new wind filter screen pressure difference switch 29, return air filter screen pressure difference switch 30 and surface cooler 36, and in the present embodiment, the outer wall of described rack 44 is provided with return air manual modulation valve 38 and air-supply manual modulation valve 39.Described new wind filter screen pressure difference switch 29 is connected with I/O loader 10 respectively by shielded signal line with return air filter screen pressure difference switch 30.

Embodiment 2

The present embodiment is substantially the same manner as Example 1, and difference is: described temperature transmitter comprises wind pushing temperature transmitter 11, return air temperature transmitter 12, new air temperature transmitter 13, supply water temperature transmitter 14.Described wind pushing temperature transmitter 11, return air temperature transmitter 12, new air temperature transmitter 13 are separately positioned on the return air inlet 42 of air outlet 43 air-conditioner, the fresh wind port 41 of air-conditioner of air-conditioner.Described supply water temperature transmitter 14 is arranged on water supply line.

Embodiment 3

The present embodiment is substantially the same manner as Example 1, and difference is: the two ends of described surface cooler 36 are connected with the water valve 26 of supply water temperature transmitter 14 and water valve drive circuit 25 respectively by water supply line.

Embodiment 4

The present embodiment is substantially the same manner as Example 1, and difference is: new wind filter screen pressure difference switch 29 and return air filter screen pressure difference switch 30 are respectively equipped with new wind filter screen 33 and return air filter screen 37.

Embodiment 5

See Fig. 3 to Figure 11, a kind of control program of packaged air conditioner intelligent energy-saving control system comprises following program circuit:

Step one, temperature sampling conversion program flow process;

Step 2, three kinds of basic model determining program flow processs;

Step 3, three kinds of basic models control setup parameter program circuit;

Step 4, logic control main program flow;

Boiler pressure control subroutine flow under step 5, three kinds of basic models;

Setup parameter second order subroutine flow process is controlled under step 6, precooling, preheating mode;

Step 7, water valve control setup parameter second order subroutine flow process;

Step 8, fault detection program flow process;

Described temperature conversion program flow process is as follows:

Temperature transmitter becomes air-supply, return air, new wind, supply water temperature the analog input register that electric signals sends into programmable logic controller (PLC) PLC, be the temperature value of actual change by the sample conversion Program transformation in PLC, judge for program, calculate and show at touch-screen;

A, PLC main program that powers on performs connection first scan period SM0.1 instruction, connect ATCH interrupt function block instruction, to interruption INT_0 assignment: setting interrupt event is Interruption 0, the time interval special storage device SMB34=100ms of setting Interruption 0, allows the overall situation to open interruption;

B, as timer SMB34=100ms disconnecting INT_0, keep the scene intact, connect interrupt event service routine, otherwise continue to perform main program;

C, in interrupt event service routine, setting counter C0=50, each interrupt occurrence count device adds 1, and preserve count value, after full 50 times of meter, air-supply, return air, new wind, supply water temperature are sampled and sampled value is kept in the register of PLC, reset counter C0 restoring scene and return interrupt service routine, program is with a sampling time of 5S, air-supply, return air, new wind, supply water temperature are sampled simultaneously, constantly refresh the value of a front register, keep last freshness value;

After D, Sampling interrupt return main program, performing each scan period connects SM0.0 instruction, call sample temperature conversion routine, the air-supply of preservation, return air, new wind, supply water temperature are refreshed sampled value at every turn and carry out temperature transition by subprogram, conversion routine sample magnitude 0 ~ 32000, be measuring tempeature show value, also be that input 0 ~ 10V signal of telecommunication changed is sent in the change of corresponding external temperature, the temperature value of air-supply, return air, new wind, supply water temperature is kept in PLC register respectively, and shows on the touchscreen;

Three kinds of described basic model determining program flow processs are as follows:

After described temperature sampling conversion program flow performing, the difference of the new wind converted and supply water temperature and setting value being made comparisons judges to freeze, ventilates, heats Three models;

A, perform each scan period and connect SM0.0 instruction all the time, transmit customer data base and judge default value, when default value with actual judge there is deviation time, can be revised by touch-screen, modified values feeding PLC register invocation pattern judges subprogram;

B, program for Three models basis for estimation, improve the stability of a system by delay judgement with new air temperature-supply water temperature=temperature difference △ t;

C, Program time delay 10S, when △ t be greater than judge refrigeration mode setting default value 17 DEG C time, be judged as refrigeration, otherwise return;

D, Program time delay 10S, judge heating mode default value-27 DEG C when △ t is less than, be judged as heating, otherwise return;

E, Program time delay 10S, be judged as between the two ventilating when △ t is in, otherwise return;

F, pattern once determine, touch-screen display mode;

Described Three models controls setup parameter subroutine flow and is described as follows:

After described step one and step 2 perform, under pattern acknowledgement state, call different control setup parameter subprogram respectively, carry out parameter assignment for later rate-determining steps and prepare:

A, call refrigeration mode setup parameter when program is judged as refrigeration mode, the one group of default parameter value being placed on customer data base is in advance sent into PLC register by program respectively, concrete default parameters: the pressure fan rotating speed upper limit 100%, pressure fan lower rotation speed limit 70%, the return air temperature upper limit 28 DEG C, return air temperature lower limit 22 DEG C, water valve 100% aperture, air returning valve 100% aperture, new air-valve 35% aperture, exhaust valve 35% aperture.If when this group default parameters and working control run and have deviation, refreshed by touch-screen amendment error set point and be kept in the register of PLC, if zero deflection terminates call subroutine return main program;

B, call air vent mode setup parameter when program is judged as air vent mode, the one group of default parameter value being placed on customer data base is in advance sent in the register of PLC by program respectively, concrete default parameters: the return air temperature upper limit 26 DEG C, return air temperature lower limit 24 DEG C, water valve 0% aperture, air returning valve 100% aperture, new air-valve 100% aperture, exhaust valve 100% aperture.If this group default parameters and working control run when having a deviation, error set point can be revised by touch-screen equally and refresh and be kept in the register of PLC, if zero deflection terminates call subroutine return main program;

C, call heating mode setup parameter when program is judged as heating mode, the one group of default parameter value being placed on customer data base is in advance sent in the register of PLC by program respectively, concrete default parameters: the pressure fan rotating speed upper limit 100%, pressure fan lower rotation speed limit 70%, the return air temperature upper limit 24 DEG C, return air temperature lower limit 18 DEG C, water valve 100% aperture, air returning valve 100% aperture, new air-valve 35% aperture, exhaust valve 35% aperture.If this group default parameters and working control run when having a deviation, error set point can be revised by touch-screen equally and refresh and be kept in the register of PLC, if zero deflection terminates call subroutine return main program;

Described logic control main program program circuit is as follows:

Perform above-mentioned step one to three after, next how chain logic start and stop air-conditioner device, specific procedure is as follows:

After A, pattern are determined, the control setup parameter subprogram different according to different mode invocations;

After B, program accept starting-up signal, connect water valve and air returning valve, and the setting aperture signal of telecommunication is sent into water valve, air returning valve respectively;

After C, Program time delay 5S, then connect new air-valve and exhaust valve, and the setting aperture signal of telecommunication is sent into new air-valve, exhaust valve respectively;

After D, Program time delay 60S, whether Programmable detection water valve open degree feedback has feedback, if there is no feedback signal, connect alarm, program is standby and record water valve fault time, if have feedback signal program to detect other air returning valves, newly air-valve, exhaust valve open degree feedback more whether have feedback, if do not have feedback to perform process signal above equally just connect the warning also record trouble time, if having feedback touch-screen display aperture and enter next step;

E, program, by above-mentioned open degree feedback signal detection, under situation is all opened in confirmation, connect pressure fan run signal, time delay 5S connects return fan run signal again, if normal operation, operation feedback is passed to touch-screen display, otherwise program is awaited orders and alarm logging;

After F, pressure fan, return fan normal operation, routine call Boiler pressure control subprogram;

G, after Boiler pressure control subprogram returns, follow pressure fan controlled quentity controlled variable with return fan and drive pressure fan, return fan converting operation, touch-screen display air quantity, time delay 30S, run Program and detect water valve all the time, air returning valve, new air-valve, the aperture situation of exhaust valve, whether delay judgement all valve areas feedback is consistent with setting, if wherein any one air-valve is inconsistent, out-of-blast machine and return fan run at once, warning is awaited orders and is recorded this equipment fault time, program also detects pressure fan and return fan operation conditions simultaneously, fault-signal is had once detection pressure fan or return fan, at once out of service and alarm logging fault, so constantly cycle detection is until normal shutdown,

H, system closedown first out-of-blast machine, return fan, closes water valve after time delay 10S, then closes all air-valves after time delay 5S, until EP (end of program) when water valve, air-valve are fed back to 0;

Under described Three models, Boiler pressure control subroutine flow is as follows:

After step 4 described in execution, in chain unlatching pressure fan, return fan situation, call Boiler pressure control subprogram, under deterministic model, regulate pressure fan frequency converter rotating speed with return air temperature change, realize variable air rate energy-saving run, concrete Boiler pressure control divides refrigeration, ventilates, heats;

Refrigeration Boiler pressure control subroutine flow illustrates:

A, call refrigeration mode Boiler pressure control subprogram, if return air temperature is between setting district within the scope of 22 ~ 28 DEG C, return air temperature proportional linearity correspondence 70 ~ 100% controlled quentity controlled variable drives pressure fan frequency control operation and return fan follows pressure fan air quantity;

B, subprogram calculate the restriction of air output method adoption rate adjustment+condition, refrigeration functional expression y=70+Kx (△ t), wherein, and y-air output, x (△ t)-temperature difference amount;

Proportionality constant

Refrigeration $K=\frac{100-70}{28-22}=5,$

X (△ t)=return air temperature-design temperature lower limit in formula;

As shown in figure 12.

After C, time delay 2S when return air temperature is greater than capping 28 DEG C, air quantity exports with 100%, time delay 5 minutes, if discharge quantity of fan or 100% exports, system is judged as precooling pattern, and call precooling Schema control setup parameter subprogram, readjust water valve, air returning valve, new air-valve, exhaust valve aperture;

After D, time delay 2S when return air temperature is less than setting lower limit 22 DEG C, air output exports with 70%, time delay 5 minutes, if discharge quantity of fan or 70% exports, system is from determining water yield variable air rate changed variable water volume quantitative wind control into originally, and system still keeps 70% air quantity, the water valve called under this pattern controls setup parameter subprogram, control setting value assignment to water valve, by the aperture of wind pushing temperature change proportional water valve, water valve aperture 0 ~ 100% exports;

Ventilation volume controls subroutine flow and illustrates:

A, call air vent mode Boiler pressure control subprogram, if return air temperature is between setting district within the scope of 24 ~ 26 DEG C, return air temperature proportional linearity correspondence 70 ~ 90% controlled quentity controlled variable drives pressure fan frequency control to run, and return fan is more with pressure fan air quantity;

After B, time delay 2S when return air temperature is greater than capping 26 DEG C, the air quantity of pressure fan and return fan exports with 100%;

After C, time delay 2S when return air temperature is less than setting lower limit 24 DEG C, the air quantity of pressure fan and return fan exports with 70%;

Heat Boiler pressure control subroutine flow to illustrate:

A, call heating mode Boiler pressure control subprogram, if return air temperature is between setting district within the scope of 18 ~ 24 DEG C, return air temperature proportional linearity correspondence 100 ~ 70% controlled quentity controlled variable drives pressure fan frequency control operation and return fan follows pressure fan air quantity;

After B, time delay 2S when return air temperature is greater than capping 26 DEG C, the air quantity of pressure fan and return fan exports with 100%;

After C, time delay 2S when return air temperature is less than setting lower limit 24 DEG C, the air quantity of pressure fan and return fan exports with 70%;

Heat Boiler pressure control subroutine flow to illustrate:

A, call heating mode Boiler pressure control subprogram, return air temperature is between setting district within the scope of 18 ~ 24 DEG C in this way, and return air temperature proportional linearity correspondence 100 ~ 70% controlled quentity controlled variable drives pressure fan frequency control operation and return fan follows air-supply air quantity;

B, subprogram calculate the restriction of air output method adoption rate adjustment+condition, heat functional expression y=100-K.x (△ t), wherein, and y-air output, x (△ t)-temperature difference amount;

Proportionality constant

Refrigeration $K=\frac{100-70}{24-18}=5,$

X (△ t)=return air temperature-design temperature lower limit in formula.

Under functional arrangement is shown in:

After C, time delay 2S when return air temperature is less than setting lower limit 18 DEG C, the air quantity of pressure fan and return fan exports with 100%, time delay 5 minutes, if discharge quantity of fan or 100% exports, system is judged as preheating mode, and call preheating mode control setup parameter subprogram, readjust the aperture of water valve, air returning valve, new air-valve and exhaust valve;

After D, time delay 2S when return air temperature is greater than capping 24 DEG C, the air output of pressure fan and return fan exports with 70%, time delay 5 minutes, if discharge quantity of fan or 70% exports, system is from determining water yield variable air rate changed variable water volume quantitative wind control into originally, system still keeps 70% air quantity, and the water valve called under this pattern controls setup parameter subprogram, exports according to wind pushing temperature change proportion adjustment water valve aperture 0 ~ 100%;

Setup parameter second order subroutine flow process is controlled as follows under described precooling, preheating mode:

A, in refrigeration, heat under two pattern Boiler pressure control subprograms control, if discharge quantity of fan or 100% output, system delay is judged as precooling or preheating mode;

B, call precooling, warm-up control setup parameter second order subroutine respectively, again assignment water valve, air returning valve, new air-valve, exhaust valve aperture, precooling, preheating default value: air output 100%, water valve aperture 100%, air returning valve aperture 100%, new valve area 0%, exhaust valve aperture 0%;

If when C default value and working control have a deviation, can be revised by touch-screen, be kept at after refreshing in PLC register, return higher level's subprogram and again drive and perform water valve, aperture that air-valve is new;

It is as follows that described water valve controls setup parameter second order subroutine flow process:

A, in refrigeration, heat under two pattern Boiler pressure control subprograms control, if discharge quantity of fan or 70% exports, system is determined water yield variable air rate changed variable water volume quantitative wind control into from original;

B, call water valve respectively and control setup parameter second order subroutine, refrigeration default value: the water valve aperture upper limit 100%, aperture lower limit 0%, the wind pushing temperature upper limit 25 DEG C, wind pushing temperature lower limit 15 DEG C; Heat default value: the water valve aperture upper limit 100%, aperture lower limit 0%, the wind pushing temperature upper limit 45 DEG C, wind pushing temperature lower limit 35 DEG C;

If when C default value and working control have a deviation, can be revised, be kept at the register of PLC after refreshing, return higher level's subprogram by touch-screen, system is with wind pushing temperature change proportion adjustment water valve 0 ~ 100% aperture;

Fault detection program flow process is as follows:

After step 4 to seven described in system performs, each scan period checkout equipment running status, specific procedure is as follows:

After A, pressure fan, return fan converting operation, the time delay of each scan period detects water valve, air returning valve, new air-valve, exhaust valve aperture, when water valve aperture and setting value inconsistent time, alarm logging fault, but do not shut down.When air returning valve, new air-valve, any one aperture of exhaust valve and setting value are inconsistent, alarm logging fault halt system run, if unanimously, and touch-screen display aperture.

After B, pressure fan, return fan converting operation, each scan period detects pressure fan, return fan running status, has fault once detection, and halt system runs and alarm logging content fault time at once.

After C, pressure fan, return fan converting operation, each scan period time delay detects new wind, whether return air filter screen pressure difference switch is connected, once there be connection signal system not shut down, and alarm logging content fault time.

Obviously, those skilled in the art can carry out various change and modification to the present invention and not depart from the spirit and scope of the present invention.Like this, if these amendments of the present invention and modification belong within the scope of the claims in the present invention and equivalent technologies thereof, then the present invention is also intended to comprise these change and modification.

The content be not described in detail in this description belongs to the known prior art of professional and technical personnel in the field.

Claims (2)

1. a packaged air conditioner intelligent energy-saving control system, comprise temperature transmitter, rack (44), controller (5), expansion module, drive circuit, touch-screen (1) and long distance control system (2), it is characterized in that: described expansion module comprises the first Analog input mModule (7-1), second Analog input mModule (7-2) and analog output module (8), one end of first Analog input mModule (7-1) is connected with controller (5) by the first external bus connector (6-1), the other end by the second external bus connector (6-2) and the 3rd external bus interface (6-3) successively with analog output module (8), second Analog input mModule (7-2) is connected, described temperature transmitter comprises wind pushing temperature transmitter (11), return air temperature transmitter (12), new air temperature transmitter (13), supply water temperature transmitter (14), described wind pushing temperature transmitter (11), return air temperature transmitter (12), new air temperature transmitter (13) are separately positioned on the return air inlet (42) of air outlet (43) air-conditioner of air-conditioner, the fresh wind port (41) of air-conditioner, and described temperature transmitter is connected with the first Analog input mModule (7-1) by shielded signal line, described supply water temperature transmitter (14) is arranged on water supply line, described controller (5) has two interfaces and RS-485P1 communication interface (3) and RS-485P0 communication interface (4), P1 communication interface (3) is connected with touch-screen (1) by communication cable, and P0 communication interface (4) is connected with long distance control system (2) by Modbus-RTU communications protocol, described controller (5) is connected with I/O follower (9) one end and I/O loader (10) one end respectively by internal bus, described I/O follower (9) is connected with drive circuit by shielded signal line respectively with the other end of I/O loader (10), described drive circuit comprises pressure fan drive circuit (15), return fan drive circuit (17), air returning valve drive circuit (19), new air-valve drive circuit (21), exhaust valve drive circuit (23), water valve drive circuit (25) and runner drive circuit (27), establishes pressure fan frequency conversion tank and be connected with pressure fan (16) by wire in described pressure fan drive circuit (15), establish return fan frequency conversion tank in described return fan drive circuit (17) and be connected with return fan (18) by wire, described air returning valve drive circuit (19) comprises the air returning valve (20) and air returning valve motor (35) that are connected by wire, described new air-valve drive circuit (21) comprises the new air-valve (22) and new air-valve motor (32) that are connected by wire, described exhaust valve drive circuit (23) comprises the exhaust valve (24) and exhaust valve motor (35) that are connected by wire, is provided with exhaust outlet (40) outside exhaust valve (24), described runner drive circuit (27) comprises the runner motor (28) and runner (34) that are connected by wire, wherein air returning valve drive circuit (19), new air-valve drive circuit (21), exhaust valve drive circuit (23) and water valve drive circuit (25) are connected with analog output module (8), the second Analog input mModule (7-2) respectively by shielded signal line, and pressure fan drive circuit (15) and return fan drive circuit (17) are connected with analog output module (8) respectively by shielded signal line, described rack (44) inwall is provided with new wind filter screen pressure difference switch (29), return air filter screen pressure difference switch (30) and surface cooler (36), new wind filter screen pressure difference switch (29) and return air filter screen pressure difference switch (30) are respectively equipped with new wind filter screen (33) and return air filter screen (37), and the outer wall of described rack (44) is provided with return air manual modulation valve (38) and air-supply manual modulation valve (39), the two ends of described surface cooler (36) are connected with the water valve (26) of supply water temperature transmitter (14) and water valve drive circuit (25) respectively by water supply line, described new wind filter screen pressure difference switch (29) is connected with I/O loader (10) respectively by shielded signal line with return air filter screen pressure difference switch (30).

2. a control program for packaged air conditioner intelligent energy-saving control system, is characterized in that: described control program comprises following program circuit:

Step one, temperature sampling conversion program flow process;

Step 2, three kinds of basic model determining program flow processs;

Step 3, three kinds of basic models control setup parameter program circuit;

Step 4, logic control main program flow;

Boiler pressure control subroutine flow under step 5, three kinds of basic models;

Setup parameter second order subroutine flow process is controlled under step 6, precooling, preheating mode;

Step 7, water valve control setup parameter second order subroutine flow process;

Step 8, fault detection program flow process;

Described temperature conversion program flow process is as follows:

Temperature transmitter becomes air-supply, return air, new wind, supply water temperature the analog input register that electric signals sends into programmable logic controller (PLC) PLC, be the temperature value of actual change by the sample conversion Program transformation in PLC, judge for program, calculate and show at touch-screen;

A, PLC main program that powers on performs connection first scan period SM0.1 instruction, connect ATCH interrupt function block instruction, to interruption INT_0 assignment: setting interrupt event is Interruption 0, the time interval special storage device SMB34=100ms of setting Interruption 0, allows the overall situation to open interruption;

B, as timer SMB34=100ms disconnecting INT_0, keep the scene intact, connect interrupt event service routine, otherwise continue to perform main program;

C, in interrupt event service routine, setting counter C0=50, each interrupt occurrence count device adds 1, and preserve count value, after full 50 times of meter, air-supply, return air, new wind, supply water temperature are sampled and sampled value is kept in the register of PLC, reset counter C0 restoring scene and return interrupt service routine, program is with a sampling time of 5S, air-supply, return air, new wind, supply water temperature are sampled simultaneously, constantly refresh the value of a front register, keep last freshness value;

After D, Sampling interrupt return main program, performing each scan period connects SM0.0 instruction, call sample temperature conversion routine, the air-supply of preservation, return air, new wind, supply water temperature are refreshed sampled value at every turn and carry out temperature transition by subprogram, conversion routine sample magnitude 0 ~ 32000, be measuring tempeature show value, also be that input 0 ~ 10V signal of telecommunication changed is sent in the change of corresponding external temperature, the temperature value of air-supply, return air, new wind, supply water temperature is kept in PLC register respectively, and shows on the touchscreen;

Three kinds of described basic model determining program flow processs are as follows:

After described temperature sampling conversion program flow performing, the difference of the new wind converted and supply water temperature and setting value being made comparisons judges to freeze, ventilates, heats Three models;

A, perform each scan period and connect SM0.0 instruction all the time, transmit customer data base and judge default value, when default value with actual judge there is deviation time, can be revised by touch-screen, modified values feeding PLC register invocation pattern judges subprogram;

B, program for Three models basis for estimation, improve the stability of a system by delay judgement with new air temperature-supply water temperature=temperature difference △ t;

C, Program time delay 10S, when △ t be greater than judge refrigeration mode setting default value 17 DEG C time, be judged as refrigeration, otherwise return;

D, Program time delay 10S, judge heating mode default value-27 DEG C when △ t is less than, be judged as heating, otherwise return;

E, Program time delay 10S, be judged as between the two ventilating when △ t is in, otherwise return;

F, pattern once determine, touch-screen display mode;

Described Three models controls setup parameter subroutine flow and is described as follows:

After described step one and step 2 perform, under pattern acknowledgement state, call different control setup parameter subprogram respectively, carry out parameter assignment for later rate-determining steps and prepare:

A, refrigeration mode setup parameter is called when program is judged as refrigeration mode, the one group of default parameter value being placed on customer data base is in advance sent into PLC register by program respectively, concrete default parameters: the pressure fan rotating speed upper limit 100%, pressure fan lower rotation speed limit 70%, the return air temperature upper limit 28 DEG C, return air temperature lower limit 22 DEG C, water valve 100% aperture, air returning valve 100% aperture, new air-valve 35% aperture, exhaust valve 35% aperture, if when this group default parameters and working control run and have deviation, being refreshed by touch-screen amendment error set point is kept in the register of PLC, if zero deflection terminates call subroutine return main program,

B, air vent mode setup parameter is called when program is judged as air vent mode, the one group of default parameter value being placed on customer data base is in advance sent in the register of PLC by program respectively, concrete default parameters: the return air temperature upper limit 26 DEG C, return air temperature lower limit 24 DEG C, water valve 0% aperture, air returning valve 100% aperture, new air-valve 100% aperture, exhaust valve 100% aperture, if when this group default parameters and working control run and have deviation, can revise error set point refreshing by touch-screen is equally kept in the register of PLC, if zero deflection terminates call subroutine return main program,

C, heating mode setup parameter is called when program is judged as heating mode, the one group of default parameter value being placed on customer data base is in advance sent in the register of PLC by program respectively, concrete default parameters: the pressure fan rotating speed upper limit 100%, pressure fan lower rotation speed limit 70%, the return air temperature upper limit 24 DEG C, return air temperature lower limit 18 DEG C, water valve 100% aperture, air returning valve 100% aperture, new air-valve 35% aperture, exhaust valve 35% aperture, if when this group default parameters and working control run and have deviation, can revise error set point refreshing by touch-screen is equally kept in the register of PLC, if zero deflection terminates call subroutine return main program,

Described logic control main program program circuit is as follows:

Perform above-mentioned step one to three after, next how chain logic start and stop air-conditioner device, specific procedure is as follows:

After A, pattern are determined, the control setup parameter subprogram different according to different mode invocations;

After B, program accept starting-up signal, connect water valve and air returning valve, and the setting aperture signal of telecommunication is sent into water valve, air returning valve respectively;

After C, Program time delay 5S, then connect new air-valve and exhaust valve, and the setting aperture signal of telecommunication is sent into new air-valve, exhaust valve respectively;

After D, Program time delay 60S, whether Programmable detection water valve open degree feedback has feedback, if there is no feedback signal, connect alarm, program is standby and record water valve fault time, if have feedback signal program to detect other air returning valves, newly air-valve, exhaust valve open degree feedback more whether have feedback, if do not have feedback to perform process signal above equally just connect the warning also record trouble time, if having feedback touch-screen display aperture and enter next step;

E, program, by above-mentioned open degree feedback signal detection, under situation is all opened in confirmation, connect pressure fan run signal, time delay 5S connects return fan run signal again, if normal operation, operation feedback is passed to touch-screen display, otherwise program is awaited orders and alarm logging;

After F, pressure fan, return fan normal operation, routine call Boiler pressure control subprogram;

G, after Boiler pressure control subprogram returns, follow pressure fan controlled quentity controlled variable with return fan and drive pressure fan, return fan converting operation, touch-screen display air quantity, time delay 30S, run Program and detect water valve all the time, air returning valve, new air-valve, the aperture situation of exhaust valve, whether delay judgement all valve areas feedback is consistent with setting, if wherein any one air-valve is inconsistent, out-of-blast machine and return fan run at once, warning is awaited orders and is recorded this equipment fault time, program also detects pressure fan and return fan operation conditions simultaneously, fault-signal is had once detection pressure fan or return fan, at once out of service and alarm logging fault, so constantly cycle detection is until normal shutdown,

H, system closedown first out-of-blast machine, return fan, closes water valve after time delay 10S, then closes all air-valves after time delay 5S, until EP (end of program) when water valve, air-valve are fed back to 0;

Under described Three models, Boiler pressure control subroutine flow is as follows:

After step 4 described in execution, in chain unlatching pressure fan, return fan situation, call Boiler pressure control subprogram, under deterministic model, regulate pressure fan frequency converter rotating speed with return air temperature change, realize variable air rate energy-saving run, concrete Boiler pressure control divides refrigeration, ventilates, heats;

Refrigeration Boiler pressure control subroutine flow illustrates:

A, call refrigeration mode Boiler pressure control subprogram, if return air temperature is between setting district within the scope of 22 ~ 28 DEG C, return air temperature proportional linearity correspondence 70 ~ 100% controlled quentity controlled variable drives pressure fan frequency control operation and return fan follows pressure fan air quantity; Wherein, y-air output, x (△ t)-temperature difference amount;

B, subprogram calculate the restriction of air output method adoption rate adjustment+condition, refrigeration functional expression y=70+Kx (△ t),

Proportionality constant

Refrigeration $K=\frac{100-70}{28-22}=5,$

X (△ t)=return air temperature-design temperature lower limit in formula;

After C, time delay 2S when return air temperature is greater than capping 28 DEG C, air quantity exports with 100%, time delay 5 minutes, if discharge quantity of fan or 100% exports, system is judged as precooling pattern, and call precooling Schema control setup parameter subprogram, readjust water valve, air returning valve, new air-valve, exhaust valve aperture;

After D, time delay 2S when return air temperature is less than setting lower limit 22 DEG C, air output exports with 70%, time delay 5 minutes, if discharge quantity of fan or 70% exports, system is from determining water yield variable air rate changed variable water volume quantitative wind control into originally, and system still keeps 70% air quantity, the water valve called under this pattern controls setup parameter subprogram, control setting value assignment to water valve, by the aperture of wind pushing temperature change proportional water valve, water valve aperture 0 ~ 100% exports;

Ventilation volume controls subroutine flow and illustrates:

A, call air vent mode Boiler pressure control subprogram, if return air temperature is between setting district within the scope of 24 ~ 26 DEG C, return air temperature proportional linearity correspondence 70 ~ 90% controlled quentity controlled variable drives pressure fan frequency control to run, and return fan follows pressure fan air quantity;

After B, time delay 2S when return air temperature is greater than capping 26 DEG C, the air quantity of pressure fan and return fan exports with 100%;

After C, time delay 2S when return air temperature is less than setting lower limit 24 DEG C, the air quantity of pressure fan and return fan exports with 70%;

Heat Boiler pressure control subroutine flow to illustrate:

A, call heating mode Boiler pressure control subprogram, if return air temperature is between setting district within the scope of 18 ~ 24 DEG C, return air temperature proportional linearity correspondence 100 ~ 70% controlled quentity controlled variable drives pressure fan frequency control operation and return fan follows pressure fan air quantity;

B, subprogram calculate the restriction of air output method adoption rate adjustment+condition, heat functional expression y=100-K.x (△ t), wherein, and y-air output, x (△ t)-temperature difference amount;

Proportionality constant

Refrigeration $K=\frac{100-70}{24-18}=5,$

X (△ t)=return air temperature-design temperature lower limit in formula;

After C, time delay 2S when return air temperature is less than setting lower limit 18 DEG C, the air quantity of pressure fan and return fan exports with 100%, time delay 5 minutes, if discharge quantity of fan or 100% exports, system is judged as preheating mode, and call preheating mode control setup parameter subprogram, readjust the aperture of water valve, air returning valve, new air-valve and exhaust valve;

After D, time delay 2S when return air temperature is greater than capping 24 DEG C, the air output of pressure fan and return fan exports with 70%, time delay 5 minutes, if discharge quantity of fan or 70% exports, system is from determining water yield variable air rate changed variable water volume quantitative wind control into originally, system still keeps 70% air quantity, and the water valve called under this pattern controls setup parameter subprogram, exports according to wind pushing temperature change proportion adjustment water valve aperture 0 ~ 100%;

Setup parameter second order subroutine flow process is controlled as follows under described precooling, preheating mode:

A, in refrigeration, heat under two pattern Boiler pressure control subprograms control, if discharge quantity of fan or 100% output, system delay is judged as precooling or preheating mode;

B, call precooling, warm-up control setup parameter second order subroutine respectively, again assignment water valve, air returning valve, new air-valve, exhaust valve aperture, precooling, preheating default value: air output 100%, water valve aperture 100%, air returning valve aperture 100%, new valve area 0%, exhaust valve aperture 0%;

If when C default value and working control have a deviation, can be revised by touch-screen, be kept at after refreshing in PLC register, return higher level's subprogram and again drive and perform water valve, aperture that air-valve is new;

It is as follows that described water valve controls setup parameter second order subroutine flow process:

A, in refrigeration, heat under two pattern Boiler pressure control subprograms control, if discharge quantity of fan or 70% exports, system is determined water yield variable air rate changed variable water volume quantitative wind control into from original;

B, call water valve respectively and control setup parameter second order subroutine, refrigeration default value: the water valve aperture upper limit 100%, aperture lower limit 0%, the wind pushing temperature upper limit 25 DEG C, wind pushing temperature lower limit 15 DEG C; Heat default value: the water valve aperture upper limit 100%, aperture lower limit 0%, the wind pushing temperature upper limit 45 DEG C, wind pushing temperature lower limit 35 DEG C;

If when C default value and working control have a deviation, can be revised, be kept at the register of PLC after refreshing, return higher level's subprogram by touch-screen, system is with wind pushing temperature change proportion adjustment water valve 0 ~ 100% aperture;

Fault detection program flow process is as follows:

After step 4 to seven described in system performs, each scan period checkout equipment running status, specific procedure is as follows:

After A, pressure fan, return fan converting operation, the time delay of each scan period detects water valve, air returning valve, new air-valve, exhaust valve aperture, when water valve aperture and setting value inconsistent time, alarm logging fault, but do not shut down.When air returning valve, new air-valve, any one aperture of exhaust valve and setting value are inconsistent, alarm logging fault halt system run, if unanimously, and touch-screen display aperture;

After B, pressure fan, return fan converting operation, each scan period detects pressure fan, return fan running status, has fault once detection, and halt system runs and alarm logging content fault time at once;

After C, pressure fan, return fan converting operation, each scan period time delay detects new wind, whether return air filter screen pressure difference switch is connected, once there be connection signal system not shut down, and alarm logging content fault time.