CN102878635A - 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

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 the box-like air-conditioner VFC of traditional group:

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, heat in the phase because the temperature of cataclysm and can not the automatic mode conversion, it is low or too high to cause Indoor Temperature to be spent, and can not satisfy like this air-conditioning comfort temperature and waste again energy consumption.。

2, during the box-like air-conditioner variable frequency adjustment of traditional group air output, all be with return air temperature and set relatively calculate between upper and lower region one 0～100% of output (0～20mA) controlled quentity controlled variable, again this controlled quentity controlled variable to the Frequency Converter Control pressure fan.Air output is unallowed very little in actual air-conditioning uses, and must guarantee the primary demand of air output.Traditional packaged air conditioner Frequency Converter Control only can arrange the primary demand that the lower limit ratio limits to satisfy air output in frequency converter.

3, the box-like air-conditioner pressure fan of traditional group switch board all is that producer carries, the equipment such as the sensor of one cover air-conditioner, air-valve, water valve all are to finish examination and controlling by BAS (building automation system), BAS (building automation system) construction burden but also relatively dispersion had so not only been increased the weight of, the disadvantages such as maintenance is inconvenient after causing, and management difficulty is large.

4, the box-like air-conditioner man-machine interface of traditional group (touch-screen) all is as monitoring interface take literal, numeral, colour switching, figure also is the simple graph that carries with the touch-screen programming software, whole interface is relatively more dull, if imaging industrial computer or the same high-resolution motion graphics of computer are done in the interface, touch-screen can't be realized at all.

In view of defects, the demand that existing packaged air conditioner frequency-changing control system can't satisfying the market.

Summary of the invention

The objective of the invention is to research and develop with great concentration through the applicant in order to overcome the deficiency of above-mentioned background technology, repetition test, and a kind of packaged air conditioner intelligent energy-saving control system that can satisfy 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 analog input module, analog input module and analog output module, one end of analog input module is connected with controller by the external bus connector, and the other end links to each other with analog output module, analog input module with external bus interface successively by the 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 the air outlet air-conditioner of air-conditioner, the fresh wind port of air-conditioner, and described temperature transmitter links to each other with the analog input module by the shielded signal line; Described supply water temperature transmitter is installed on the water supply line; It is RS-485P1 communication interface and RS-485P0 communication interface that described controller has two interfaces, and the P1 communication interface links to each other with long distance control system with touch-screen with the Modbus-RTU communications protocol by communication cable respectively with the P0 communication interface; Described controller is connected end with I/O follower one end respectively by internal bus and is connected with the I/O loader; The other end of described I/O follower and I/O loader links to each other with drive circuit respectively by the shielded signal line; 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 the pressure fan frequency conversion tank in the described pressure fan drive circuit and is connected with pressure fan by wire; Establish the return fan frequency conversion tank in the described return fan drive circuit and be connected with return fan by wire; Described air returning valve drive circuit comprises air returning valve and the air returning valve motor that connects by wire; Described new air-valve drive circuit comprises new air-valve and the new air-valve motor that connects by wire; Described exhaust valve drive circuit comprises exhaust valve and the exhaust valve motor that connects by wire, and exhaust valve is provided with exhaust outlet outward; Described runner drive circuit comprises runner motor and the runner that connects by wire; Wherein air returning valve drive circuit, new air-valve drive circuit, exhaust valve drive circuit and water valve drive circuit join with analog output module, analog input module respectively by the shielded signal line, and pressure fan drive circuit and return fan drive circuit join with analog output module respectively by the shielded signal line; Be provided with new wind filter screen pressure difference switch, return air filter screen pressure difference switch and surface cooler on the described rack inwall, be respectively equipped with new wind filter screen and return air filter screen on new wind filter screen pressure difference switch and the return air filter screen pressure difference switch, the outer wall of described rack is provided with return air manual modulation valve and air-supply manual modulation valve; Be connected water valve with the supply water temperature transmitter respectively by water supply line and be connected in the two ends of described surface cooler with the water valve drive circuit; Described new wind filter screen pressure difference switch and return air filter screen pressure difference switch are connected with the I/O loader by the shielded signal line respectively.

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 1, temperature sampling conversion program flow process;

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

Step 3, three kinds of basic model control setup parameter program circuits;

Step 4, logic control main program flow;

Air quantity control subprogram flow process under step 5, the three kinds of basic models;

Control setup parameter second order subroutine flow process under step 6, precooling, the 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 the analog input register that send the signal of telecommunication to send into programmable logic controller (PLC) PLC to air-supply, return air, new wind, supply water temperature, be converted to the temperature value of actual change by the sample conversion program in the PLC, judge, calculate and show at touch-screen for program;

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

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

C, in the interrupt event service routine, set counter C0=50, each interrupt occurrence count device adds 1, and preservation count value, after full 50 times of meter, to air-supply, return air, new wind, supply water temperature is sampled and sampled value is kept in the register of PLC, zero clearing counter C0 restoring scene returns interrupt service routine, program is with 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 are interrupted returning main program, carry out each scan period and connect the SM0.0 instruction, call the sample temperature conversion routine, the air-supply that subprogram will be preserved, return air, new wind, supply water temperature refresh sampled value at every turn and carry out temperature transition, conversion routine sampling numerical value 0～32000, be and measure the temperature show value, also be that the input signal of telecommunication that 0～10V changes is sent in corresponding external temperature change, with air-supply, return air, new wind, supply water temperature preferably temperature value be kept at respectively in the PLC register, and touching screen display;

Described three kinds of basic model determining program flow processs are as follows:

After the described temperature sampling conversion program flow performing, the difference of the new wind that converts and supply water temperature and setting value made comparisons judge and freeze, ventilate, heat three kinds of patterns;

A, carry out each scan period and connect all the time the SM0.0 instruction, transmit customer data base and judge default value, when default value with actual judge can revise by touch-screen when deviation is arranged, the modification value sends into the PLC register and invocation pattern is judged subprogram;

B, program improve the stability of a system take new air temperature-supply water temperature=temperature difference △ t as three kinds of mode decision foundations by delay judgement;

C, Program time delay 10S, when △ t when judging that refrigeration mode is set 17 ℃ of default values, be judged as refrigeration, otherwise return;

D, Program time delay 10S when △ t heats less than judging heating mode default value-27 ℃, being judged as, otherwise return;

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

F, pattern are in case determine the touch-screen display mode;

Described three kinds of patterns control setup parameter subprogram process description is as follows:

After described step 1 and step 2 are carried out, under the pattern acknowledgement state, call respectively different control setup parameter subprograms, carry out the parameter assignment for later control step and prepare:

A, when being judged as refrigeration mode, program calls the refrigeration mode setup parameter, program will be placed in advance one group of default parameter value of customer data base and send into respectively the PLC register, concrete default parameters: the pressure fan rotating speed upper limit 100%, pressure fan rotating speed lower limit 70%, 28 ℃ of the return air temperature upper limits, 22 ℃ of return air temperature lower limits, 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 operation have deviation, revise the deviation setting value by touch-screen and refresh in the register that is kept at PLC, return main program if zero deflection finishes call subroutine;

B, when being judged as air vent mode, program calls the air vent mode setup parameter, program will be placed in advance one group of default parameter value of customer data base and send into respectively in the register of PLC, concrete default parameters: 26 ℃ of the return air temperature upper limits, 24 ℃ of return air temperature lower limits, 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 operation have deviation, can revise the deviation setting value by touch-screen equally and refresh in the register that is kept at PLC, return main program if zero deflection finishes call subroutine;

C, when being judged as heating mode, program calls the heating mode setup parameter, program will be placed in advance one group of default parameter value of customer data base and send into respectively in the register of PLC, concrete default parameters: the pressure fan rotating speed upper limit 100%, pressure fan rotating speed lower limit 70%, 24 ℃ of the return air temperature upper limits, 18 ℃ of return air temperature lower limits, 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 operation have deviation, can revise the deviation setting value by touch-screen equally and refresh in the register that is kept at PLC, return main program if zero deflection finishes call subroutine;

Described logic control main program program circuit is as follows:

After carrying out above-mentioned step 1 to three, chain logic start and stop air-conditioner device how next, specific procedure is as follows:

After A, the mode decision, the control setup parameter subprogram different according to different mode invocations;

After B, program are accepted starting-up signal, connect water valve and air returning valve, and will set the aperture signal of telecommunication and send into respectively water valve, air returning valve;

Behind C, the Program time delay 5S, connect again new air-valve and exhaust valve, and will set the aperture signal of telecommunication and send into respectively air returning valve, exhaust valve;

Behind D, the Program time delay 60S, whether program detects the water valve open degree feedback feedback, if there is not feedback signal, connect alarm, program is ready and records water valve fault time, the feedback signal program detects other air returning valves again, newly whether air-valve, exhaust valve open degree feedback have feedback if having, if there is not the top process signal of the same execution of feedback just to connect the also record trouble time of reporting to the police, if the touch-screen of feedback demonstration aperture is arranged and enter next step;

E, program are confirming all to open in the situation connection pressure fan run signal by above-mentioned open degree feedback signal detection, time-delay 5S connects the return fan run signal again, if normal operation will move feedback and pass to the touch-screen demonstration, otherwise program is awaited orders and alarm logging;

Behind F, pressure fan, the return fan normal operation, routine call air quantity control subprogram;

G, after air quantity control subprogram is returned, follow the pressure fan controlled quentity controlled variable with return fan and drive pressure fan, the return fan converting operation, touch-screen shows air quantity, time-delay 30S, program in service detects water valve all the time, air returning valve, new air-valve, the aperture situation of exhaust valve, whether all valve area feedbacks of delay judgement are consistent with setting, if wherein any one air-valve is inconsistent, at once out-of-blast machine and return fan operation, warning is awaited orders and is recorded this equipment fault time, program also detects pressure fan and return fan operation conditions simultaneously, when in case detection pressure fan or return fan have fault-signal, out of service and the alarm logging fault of horse back, so constantly cycle detection is until normal shutdown;

H, system closedown be out-of-blast machine, return fan first, closes water valve behind the time-delay 10S, closes all air-valves behind the 5S that delays time again, until water valve, air-valve are fed back to EP (end of program) in 0 o'clock;

Air quantity control subprogram flow process is as follows under described three kinds of patterns:

After carrying out described step 4, in chain unlatching pressure fan, the return fan situation, call air quantity control subprogram, under deterministic model, change adjusting pressure fan frequency converter rotating speed with return air temperature, realize the variable air rate energy-saving run, concrete air quantity control divides to be freezed, ventilates, heats;

Refrigeration air quantity control subprogram process description:

A, call refrigeration mode air quantity control subprogram, if return air temperature between the setting district in 22～28 ℃ of scopes, return air temperature proportional linearity correspondence 70～100% or 14～20mA controlled quentity controlled variable drive pressure fan frequency control operation and return fan is followed the pressure fan air quantity;

B, subprogram are calculated air output method adoption rate adjusting+condition restriction, refrigeration functional expression y=70+Kx (△ t),

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

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

Behind C, the time-delay 2S when return air temperature during greater than 28 ℃ of cappings, air quantity is with 100% or 20mA output, delayed time 5 minutes, if discharge quantity of fan or 100% output, system is judged as the precooling pattern, and call precooling pattern control setup parameter subprogram, readjust water valve, air returning valve, new air-valve, exhaust valve aperture;

Behind D, the time-delay 2S when return air temperature during less than 22 ℃ of lower limits of setting, air output is with 70% or 14mA output, delayed time 5 minutes, if discharge quantity of fan or 70% output, system changed variable water volume into and decides air quantity and control from originally deciding water yield variable air rate, and system still keeps 70% air quantity, call the water valve control setup parameter subprogram under this pattern, to water valve control setting value assignment, with the aperture of wind pushing temperature variation proportional water valve, 0～100% output of water valve aperture;

Ventilation volume control subprogram process description:

A, call air vent mode air quantity control subprogram, if return air temperature between the setting district in 24～26 ℃ of scopes, return air temperature proportional linearity correspondence 70～90% or 14～18mA controlled quentity controlled variable drive pressure fan frequency control operation, return fan is more with the pressure fan air quantity;

Behind B, the time-delay 2S when return air temperature during greater than 26 ℃ of cappings, the air quantity of pressure fan and return fan with 100% or 20mA export;

Behind C, the time-delay 2S when return air temperature when setting 24 ℃ of lower limits, the air quantity of pressure fan and return fan with 70% or 14mA export;

Heat air quantity control subprogram process description:

A, call heating mode air quantity control subprogram, if return air temperature between the setting district in 18～24 ℃ of scopes, return air temperature proportional linearity correspondence 100～70% or 20～14mA controlled quentity controlled variable drive pressure fan frequency control operation and return fan is followed the pressure fan air quantity;

B, subprogram are calculated air output method adoption rate adjusting+condition restriction, refrigeration functional expression y=100-K.x (△ t),

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

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

Behind C, the time-delay 2S when return air temperature during less than 18 ℃ of lower limits of setting, the air quantity of pressure fan and return fan is with 100% or 20mA output, delayed time 5 minutes, if discharge quantity of fan or 100% output, 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;

Behind D, the time-delay 2S when return air temperature during greater than 24 ℃ of cappings, the air output of pressure fan and return fan is with 70% or 14mA output, delayed time 5 minutes, if discharge quantity of fan or 70% output, system changed variable water volume into and decides air quantity and control from originally deciding water yield variable air rate, system still keeps 70% air quantity, calls the water valve control setup parameter subprogram under this pattern, changes 0～100% output of ratio water adjusting valve aperture according to wind pushing temperature;

Control setup parameter second order subroutine flow process is as follows under described precooling, the preheating mode:

A, in refrigeration, heat under the control of two pattern air quantity control subprograms, if discharge quantity of fan or 100% is exported, 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%;

When if C default value and working control have deviation, can revise by touch-screen, be kept at after refreshing in the PLC register, return higher level's subprogram and again drive and carry out water valve, aperture that air-valve is new;

Described water valve control setup parameter second order subroutine flow process is as follows:

A, in refrigeration, heat under the control of two pattern air quantity control subprograms, if discharge quantity of fan or 70% output, system changed variable water volume into and decides air quantity and control from originally deciding water yield variable air rate;

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

When if C default value and working control have deviation, can revise by touch-screen, be kept at the register of PLC after refreshing, return higher level's subprogram, system changes ratio water adjusting valve 0～100% aperture with wind pushing temperature;

The fault detection program flow process is as follows:

System carries out after the described step 4 to seven, each scan period checkout equipment running status, and specific procedure is as follows:

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

Behind B, pressure fan, the return fan converting operation, each scan period is detected pressure fan, return fan running status, in case detect when fault is arranged at once halt system operation and alarm logging content fault time.

Behind C, pressure fan, the return fan converting operation, each scan period time-delay detects new wind, whether return air filter screen pressure difference switch is connected, in case there is the connection signal system not shut down, alarm logging content fault time.

Operation principle of the present invention: be described below in conjunction with Fig. 1 to Fig. 2: temperature transmitter carries out temperature sampling to air-supply, return air, new wind periodical feeding, and (0～10V) by shielded signal line input EM231 analog input module 7-1 with these signals of telecommunication, after analog input module 7-1 internal mode/number conversion, (0～10V) converts the numerical value (0～3200) of the inner identification of controller to, by the external bus connector described numerical value (0～3200) is kept in the input register of controller with temperature signal again.After receiving starting-up signal, controller sends chain power-on command by internal bus to the I/O follower, power-on command is connected respectively the inner corresponding soft relay of I/O follower, and each soft relay drives each corresponding equipment (being pressure fan, return fan, air returning valve, new air-valve, exhaust valve, water valve etc.) start operation again.Meanwhile, controller by the external bus connector the rotating speed control numerical value (0～3200) of the aperture of water valve, air returning valve, new air-valve, exhaust valve and pressure fan, return fan, input EM232 analog output module from the output register of controller, numerical value (0～3200) is behind the inner D/A switch of EM232 analog output module, (given signal 0～10V) drives water valve, (return, new, row) air-valve is carried out aperture, and the given signal 0～20mA of frequency drives pressure fan, return fan converting operation with these signals of telecommunication.The energy-saving run feedback of pressure fan, return fan, bypass operation feedback, energy-conservation fault feedback, motor overload feedback are passed to the 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, operation feedback are passed to analog input module 7-2, feed back to PLC through analog input module 7-2 internal mode/number conversion, external bus connector.

Packaged air conditioner intelligent energy-saving control system of the present invention, has following beneficial effect: the packaged air conditioner intelligent energy-saving control system, adopting programmable logic controller (PLC) PLC and man-machine interface touch-screen is core control, drives pressure fan in the air-conditioner, return fan realization 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 are compared, analyze, calculate and the different operating mode patterns of automatic decision, reasonably exporting different air outputs, return air amount and the different opening such as air-valve, water valve under different mode control, is purpose thereby reach synthesis energy saving.The present invention adopts hardware and software to combine, and has preferably air-conditioner temperature effect and energy-saving effect; Man-machine interface is take the air-conditioner material object as graphical interfaces, the states 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 the professional to set, and a cover air-conditioner all devices can be integrated into a mini system; Possesses the RS-485 interface, the very convenient and local and remote watch-dog communication by the Modbus-RTU communications protocol; Have novel, reasonable in design, technological specification, can form the characteristics such as industrialized mass production, remarkable in economical benefits.The present invention can be widely used in the fields such as large-scale station, harbour, hotel, hospital, universities and colleges.

Description of drawings

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 the mode decision subroutine flow chart;

Fig. 5 is the logic control main program flow chart;

Fig. 6 is three kinds of pattern control setup parameter subroutine flow charts;

Fig. 7 is refrigeration mode air quantity control subroutine flow chart;

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

Fig. 9 is heating mode air quantity control subroutine flow chart;

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

Figure 11 is water valve control setup parameter subroutine flow chart;

Figure 12 is the refrigeration functional arrangement;

Figure 13 is for heating functional arrangement.

The specific embodiment

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

Embodiment 1

Referring to 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 analog input module 7-1, analog input module 7-2 and analog output module 8, the end of analog input module 7-1 is connected with controller 5 by external bus connector 6-1, the other end links to each other with analog output module 8, analog input module 7-2 with external bus interface 6-3 successively by external bus connector 6-2, in the present embodiment, analog input module 7-1 and analog input module 7-2 are the EM231 expansion module, and analog output module 8 is the EM232 expansion module.Described temperature transmitter links to each other with analog input module 7-1 by the shielded signal line.It is RS-485P1 communication interface 3 and RS-485P0 communication interface 4 that described controller 5 has two interfaces, and P1 communication interface 3 links to each other with long distance control system 2 with touch-screen 1 with the Modbus-RTU communications protocol by communication cable respectively with P0 communication interface 4; Described controller 5 is connected an end with I/O follower 9 one ends respectively by internal bus and is connected with the I/O loader, in the present embodiment, described controller 5 is Siemens S7-200CPU226 programmable logic controller (PLC) PLC; Described touch-screen 1 is man-machine interface MT4403T touch-screen.The other end of described I/O follower 9 and I/O loader 10 links to each other with drive circuit respectively by the shielded signal line.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 join with analog output module 8, analog input module 7-2 respectively by the shielded signal line, pressure fan drive circuit 15 and return fan drive circuit 17 join with analog output module 8 respectively by the shielded signal line, in the present embodiment, establish pressure fan frequency conversion tank and be connected with pressure fan 16 by wire in the described pressure fan drive circuit 15; Establish the return fan frequency conversion tank in the described return fan drive circuit 17 and be connected with return fan 18 by wire; Described air returning valve drive circuit 19 comprises air returning valve 20 and the air returning valve motor 35 that connects by wire; Described new air-valve drive circuit 21 comprises new air-valve 22 and the new air-valve motor 32 that connects by wire; Described exhaust valve drive circuit 23 comprises exhaust valve 24 and the exhaust valve motor 35 that connects by wire, the exhaust valve 24 outer exhaust outlets 40 that are provided with; Described runner drive circuit 27 comprises runner motor 28 and the runner 34 that connects by wire.Be provided with new wind filter screen pressure difference switch 29, return air filter screen pressure difference switch 30 and surface cooler 36 on described rack 44 inwalls, 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 return air filter screen pressure difference switch respectively and is connected with I/O loader 10 by the shielded signal line.

Embodiment 2

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-conditioners of air-conditioner, the fresh wind port 41 of air-conditioner.Described supply water temperature transmitter 14 is installed on the water supply line.

Embodiment 3

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 that supply water temperature transmitter 14 is connected with the water valve drive circuit respectively by water supply line.

Embodiment 4

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

Embodiment 5

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

Step 1, temperature sampling conversion program flow process;

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

Step 3, three kinds of basic model control setup parameter program circuits;

Step 4, logic control main program flow;

Air quantity control subprogram flow process under step 5, the three kinds of basic models;

Control setup parameter second order subroutine flow process under step 6, precooling, the 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 the analog input register that send the signal of telecommunication to send into programmable logic controller (PLC) PLC to air-supply, return air, new wind, supply water temperature, be converted to the temperature value of actual change by the sample conversion program in the PLC, judge, calculate and show at touch-screen for program;

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

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

C, in the interrupt event service routine, set counter C0=50, each interrupt occurrence count device adds 1, and preservation count value, after full 50 times of meter, to air-supply, return air, new wind, supply water temperature is sampled and sampled value is kept in the register of PLC, zero clearing counter C0 restoring scene returns interrupt service routine, program is with 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 are interrupted returning main program, carry out each scan period and connect the SM0.0 instruction, call the sample temperature conversion routine, the air-supply that subprogram will be preserved, return air, new wind, supply water temperature refresh sampled value at every turn and carry out temperature transition, conversion routine sampling numerical value 0～32000, be and measure the temperature show value, also be that the input signal of telecommunication that 0～10V changes is sent in corresponding external temperature change, with air-supply, return air, new wind, supply water temperature preferably temperature value be kept at respectively in the PLC register, and touching screen display;

Described three kinds of basic model determining program flow processs are as follows:

After the described temperature sampling conversion program flow performing, the difference of the new wind that converts and supply water temperature and setting value made comparisons judge and freeze, ventilate, heat three kinds of patterns;

A, carry out each scan period and connect all the time the SM0.0 instruction, transmit customer data base and judge default value, when default value with actual judge can revise by touch-screen when deviation is arranged, the modification value sends into the PLC register and invocation pattern is judged subprogram;

B, program improve the stability of a system take new air temperature-supply water temperature=temperature difference △ t as three kinds of mode decision foundations by delay judgement;

C, Program time delay 10S, when △ t when judging that refrigeration mode is set 17 ℃ of default values, be judged as refrigeration, otherwise return;

D, Program time delay 10S when △ t heats less than judging heating mode default value-27 ℃, being judged as, otherwise return;

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

F, pattern are in case determine the touch-screen display mode;

Described three kinds of patterns control setup parameter subprogram process description is as follows:

After described step 1 and step 2 are carried out, under the pattern acknowledgement state, call respectively different control setup parameter subprograms, carry out the parameter assignment for later control step and prepare:

A, when being judged as refrigeration mode, program calls the refrigeration mode setup parameter, program will be placed in advance one group of default parameter value of customer data base and send into respectively the PLC register, concrete default parameters: the pressure fan rotating speed upper limit 100%, pressure fan rotating speed lower limit 70%, 28 ℃ of the return air temperature upper limits, 22 ℃ of return air temperature lower limits, 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 operation have deviation, revise the deviation setting value by touch-screen and refresh in the register that is kept at PLC, return main program if zero deflection finishes call subroutine;

B, when being judged as air vent mode, program calls the air vent mode setup parameter, program will be placed in advance one group of default parameter value of customer data base and send into respectively in the register of PLC, concrete default parameters: 26 ℃ of the return air temperature upper limits, 24 ℃ of return air temperature lower limits, 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 operation have deviation, can revise the deviation setting value by touch-screen equally and refresh in the register that is kept at PLC, return main program if zero deflection finishes call subroutine;

C, when being judged as heating mode, program calls the heating mode setup parameter, program will be placed in advance one group of default parameter value of customer data base and send into respectively in the register of PLC, concrete default parameters: the pressure fan rotating speed upper limit 100%, pressure fan rotating speed lower limit 70%, 24 ℃ of the return air temperature upper limits, 18 ℃ of return air temperature lower limits, 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 operation have deviation, can revise the deviation setting value by touch-screen equally and refresh in the register that is kept at PLC, return main program if zero deflection finishes call subroutine;

Described logic control main program program circuit is as follows:

After carrying out above-mentioned step 1 to three, chain logic start and stop air-conditioner device how next, specific procedure is as follows:

After A, the mode decision, the control setup parameter subprogram different according to different mode invocations;

After B, program are accepted starting-up signal, connect water valve and air returning valve, and will set the aperture signal of telecommunication and send into respectively water valve, air returning valve;

Behind C, the Program time delay 5S, connect again new air-valve and exhaust valve, and will set the aperture signal of telecommunication and send into respectively air returning valve, exhaust valve;

Behind D, the Program time delay 60S, whether program detects the water valve open degree feedback feedback, if there is not feedback signal, connect alarm, program is ready and records water valve fault time, the feedback signal program detects other air returning valves again, newly whether air-valve, exhaust valve open degree feedback have feedback if having, if there is not the top process signal of the same execution of feedback just to connect the also record trouble time of reporting to the police, if the touch-screen of feedback demonstration aperture is arranged and enter next step;

E, program are confirming all to open in the situation connection pressure fan run signal by above-mentioned open degree feedback signal detection, time-delay 5S connects the return fan run signal again, if normal operation will move feedback and pass to the touch-screen demonstration, otherwise program is awaited orders and alarm logging;

Behind F, pressure fan, the return fan normal operation, routine call air quantity control subprogram;

G, after air quantity control subprogram is returned, follow the pressure fan controlled quentity controlled variable with return fan and drive pressure fan, the return fan converting operation, touch-screen shows air quantity, time-delay 30S, program in service detects water valve all the time, air returning valve, new air-valve, the aperture situation of exhaust valve, whether all valve area feedbacks of delay judgement are consistent with setting, if wherein any one air-valve is inconsistent, at once out-of-blast machine and return fan operation, warning is awaited orders and is recorded this equipment fault time, program also detects pressure fan and return fan operation conditions simultaneously, when in case detection pressure fan or return fan have fault-signal, out of service and the alarm logging fault of horse back, so constantly cycle detection is until normal shutdown;

H, system closedown be out-of-blast machine, return fan first, closes water valve behind the time-delay 10S, closes all air-valves behind the 5S that delays time again, until water valve, air-valve are fed back to EP (end of program) in 0 o'clock;

Air quantity control subprogram flow process is as follows under described three kinds of patterns:

After carrying out described step 4, in chain unlatching pressure fan, the return fan situation, call air quantity control subprogram, under deterministic model, change adjusting pressure fan frequency converter rotating speed with return air temperature, realize the variable air rate energy-saving run, concrete air quantity control divides to be freezed, ventilates, heats;

Refrigeration air quantity control subprogram process description:

A, call refrigeration mode air quantity control subprogram, if return air temperature between the setting district in 22～28 ℃ of scopes, return air temperature proportional linearity correspondence 70～100% or 14～20mA controlled quentity controlled variable drive pressure fan frequency control operation and return fan is followed the pressure fan air quantity;

B, subprogram are calculated air output method adoption rate adjusting+condition restriction, refrigeration functional expression y=70+Kx (△ t),

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

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

As shown in figure 12.

Behind C, the time-delay 2S when return air temperature during greater than 28 ℃ of cappings, air quantity is with 100% or 20mA output, delayed time 5 minutes, if discharge quantity of fan or 100% output, system is judged as the precooling pattern, and call precooling pattern control setup parameter subprogram, readjust water valve, air returning valve, new air-valve, exhaust valve aperture;

Behind D, the time-delay 2S when return air temperature during less than 22 ℃ of lower limits of setting, air output is with 70% or 14mA output, delayed time 5 minutes, if discharge quantity of fan or 70% output, system changed variable water volume into and decides air quantity and control from originally deciding water yield variable air rate, and system still keeps 70% air quantity, call the water valve control setup parameter subprogram under this pattern, to water valve control setting value assignment, with the aperture of wind pushing temperature variation proportional water valve, 0～100% output of water valve aperture;

Ventilation volume control subprogram process description:

A, call air vent mode air quantity control subprogram, if return air temperature between the setting district in 24～26 ℃ of scopes, return air temperature proportional linearity correspondence 70～90% or 14～18mA controlled quentity controlled variable drive pressure fan frequency control operation, return fan is more with the pressure fan air quantity;

Behind B, the time-delay 2S when return air temperature during greater than 26 ℃ of cappings, the air quantity of pressure fan and return fan with 100% or 20mA export;

Behind C, the time-delay 2S when return air temperature when setting 24 ℃ of lower limits, the air quantity of pressure fan and return fan with 70% or 14mA export;

Heat air quantity control subprogram process description:

A, call heating mode air quantity control subprogram, if return air temperature between the setting district in 18～24 ℃ of scopes, return air temperature proportional linearity correspondence 100～70% or 20～14mA controlled quentity controlled variable drive pressure fan frequency control operation and return fan is followed the pressure fan air quantity;

B, subprogram are calculated air output method adoption rate adjusting+condition restriction, refrigeration functional expression y=100-K.x (△ t),

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

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

As shown in figure 13.

Behind C, the time-delay 2S when return air temperature during less than 18 ℃ of lower limits of setting, the air quantity of pressure fan and return fan is with 100% or 20mA output, delayed time 5 minutes, if discharge quantity of fan or 100% output, 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;

Behind D, the time-delay 2S when return air temperature during greater than 24 ℃ of cappings, the air output of pressure fan and return fan is with 70% or 14mA output, delayed time 5 minutes, if discharge quantity of fan or 70% output, system changed variable water volume into and decides air quantity and control from originally deciding water yield variable air rate, system still keeps 70% air quantity, calls the water valve control setup parameter subprogram under this pattern, changes 0～100% output of ratio water adjusting valve aperture according to wind pushing temperature;

Control setup parameter second order subroutine flow process is as follows under described precooling, the preheating mode:

A, in refrigeration, heat under the control of two pattern air quantity control subprograms, if discharge quantity of fan or 100% is exported, 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%;

When if C default value and working control have deviation, can revise by touch-screen, be kept at after refreshing in the PLC register, return higher level's subprogram and again drive and carry out water valve, aperture that air-valve is new;

Described water valve control setup parameter second order subroutine flow process is as follows:

A, in refrigeration, heat under the control of two pattern air quantity control subprograms, if discharge quantity of fan or 70% output, system changed variable water volume into and decides air quantity and control from originally deciding water yield variable air rate;

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

When if C default value and working control have deviation, can revise by touch-screen, be kept at the register of PLC after refreshing, return higher level's subprogram, system changes ratio water adjusting valve 0～100% aperture with wind pushing temperature;

The fault detection program flow process is as follows:

System carries out after the described step 4 to seven, each scan period checkout equipment running status, and specific procedure is as follows:

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

Behind B, pressure fan, the return fan converting operation, each scan period is detected pressure fan, return fan running status, in case detect when fault is arranged at once halt system operation and alarm logging content fault time.

Behind C, pressure fan, the return fan converting operation, each scan period time-delay detects new wind, whether return air filter screen pressure difference switch is connected, in case there is the connection signal system not shut down, alarm logging content fault time.

Obviously, those skilled in the art can carry out various changes and modification to the present invention and not break away from the spirit and scope of the present invention.Like this, if of the present invention these are revised and modification belongs within the scope of claim of the present invention and equivalent technologies thereof, then the present invention also is intended to comprise these changes and modification interior.

The content that is not described in detail in this specification belongs to the known prior art of this area professional and technical personnel.

Claims (2)

1. 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 analog input module (7-1), analog input module (7-2) and analog output module (8), one end of analog input module (7-1) is connected with controller (5) by external bus connector (6-1), the other end pass through external bus connector (6-2) and external bus interface (6-3) successively with analog output module (8), analog input module (7-2) links to each other; 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 links to each other with analog input module (7-1) by the shielded signal line; Described supply water temperature transmitter (14) is installed on the water supply line; It is RS-485P1 communication interface (3) and RS-485P0 communication interface (4) that described controller (5) has two interfaces, and P1 communication interface (3) links to each other with long distance control system (2) with touch-screen (1) with the Modbus-RTU communications protocol by communication cable respectively with P0 communication interface (4); Described controller (5) is connected 10 with I/O follower (9) one ends with the I/O loader respectively by internal bus) end is connected; Described I/O follower (9) links to each other with drive circuit respectively by the shielded signal line 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 the pressure fan frequency conversion tank in the described pressure fan drive circuit (15) and is connected with pressure fan (16) by wire; Establish the return fan frequency conversion tank in the described return fan drive circuit (17) and be connected with return fan (18) by wire; Described air returning valve drive circuit (19) comprises air returning valve (20) and the air returning valve motor (35) that connects by wire; Described new air-valve drive circuit (21) comprises new air-valve (22) and the new air-valve motor (32) that connects by wire; Described exhaust valve drive circuit (23) comprises exhaust valve (24) and the exhaust valve motor (35) that connects by wire, the outer exhaust outlet (40) that is provided with of exhaust valve (24); Described runner drive circuit (27) comprises runner motor (28) and the runner (34) that connects 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) join with analog output module (8), analog input module (7-2) respectively by the shielded signal line, and pressure fan drive circuit (15) and return fan drive circuit (17) join with analog output module (8) respectively by the shielded signal line; Be provided with new wind filter screen pressure difference switch (29), return air filter screen pressure difference switch (30) and surface cooler (36) on described rack (44) inwall, be respectively equipped with new wind filter screen (33) and return air filter screen (37) on new wind filter screen pressure difference switch (29) and the return air filter screen pressure difference switch (30), 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 25 with supply water temperature transmitter (14) with the water valve drive circuit respectively by water supply line) water valve (26) be connected; Described new wind filter screen pressure difference switch (29) is connected 30 with return air filter screen pressure difference switch) be connected with I/O loader (10) by the shielded signal line respectively.

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

Step 1, temperature sampling conversion program flow process;

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

Step 3, three kinds of basic model control setup parameter program circuits;

Step 4, logic control main program flow;

Air quantity control subprogram flow process under step 5, the three kinds of basic models;

Control setup parameter second order subroutine flow process under step 6, precooling, the 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 the analog input register that send the signal of telecommunication to send into programmable logic controller (PLC) PLC to air-supply, return air, new wind, supply water temperature, be converted to the temperature value of actual change by the sample conversion program in the PLC, judge, calculate and show at touch-screen for program;

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

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

C, in the interrupt event service routine, set counter C0=50, each interrupt occurrence count device adds 1, and preservation count value, after full 50 times of meter, to air-supply, return air, new wind, supply water temperature is sampled and sampled value is kept in the register of PLC, zero clearing counter C0 restoring scene returns interrupt service routine, program is with 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 are interrupted returning main program, carry out each scan period and connect the SM0.0 instruction, call the sample temperature conversion routine, the air-supply that subprogram will be preserved, return air, new wind, supply water temperature refresh sampled value at every turn and carry out temperature transition, conversion routine sampling numerical value 0～32000, be and measure the temperature show value, also be that the input signal of telecommunication that 0～10V changes is sent in corresponding external temperature change, with air-supply, return air, new wind, supply water temperature preferably temperature value be kept at respectively in the PLC register, and touching screen display;

Described three kinds of basic model determining program flow processs are as follows:

After the described temperature sampling conversion program flow performing, the difference of the new wind that converts and supply water temperature and setting value made comparisons judge and freeze, ventilate, heat three kinds of patterns;

A, carry out each scan period and connect all the time the SM0.0 instruction, transmit customer data base and judge default value, when default value with actual judge can revise by touch-screen when deviation is arranged, the modification value sends into the PLC register and invocation pattern is judged subprogram;

B, program improve the stability of a system take new air temperature-supply water temperature=temperature difference t as three kinds of mode decision foundations by delay judgement;

C, Program time delay 10S, when Δ t when judging that refrigeration mode is set 17 ℃ of default values, be judged as refrigeration, otherwise return;

D, Program time delay 10S when Δ t heats less than judging heating mode default value-27 ℃, being judged as, otherwise return;

E, Program time delay 10S are judged as ventilation between the two when Δ t is in, otherwise return;

F, pattern are in case determine the touch-screen display mode;

Described three kinds of patterns control setup parameter subprogram process description is as follows:

After described step 1 and step 2 are carried out, under the pattern acknowledgement state, call respectively different control setup parameter subprograms, carry out the parameter assignment for later control step and prepare:

A, when being judged as refrigeration mode, program calls the refrigeration mode setup parameter, program will be placed in advance one group of default parameter value of customer data base and send into respectively the PLC register, concrete default parameters: the pressure fan rotating speed upper limit 100%, pressure fan rotating speed lower limit 70%, 28 ℃ of the return air temperature upper limits, 22 ℃ of return air temperature lower limits, 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 operation have deviation, revise the deviation setting value by touch-screen and refresh in the register that is kept at PLC, return main program if zero deflection finishes call subroutine;

B, when being judged as air vent mode, program calls the air vent mode setup parameter, program will be placed in advance one group of default parameter value of customer data base and send into respectively in the register of PLC, concrete default parameters: 26 ℃ of the return air temperature upper limits, 24 ℃ of return air temperature lower limits, 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 operation have deviation, can revise the deviation setting value by touch-screen equally and refresh in the register that is kept at PLC, return main program if zero deflection finishes call subroutine;

C, when being judged as heating mode, program calls the heating mode setup parameter, program will be placed in advance one group of default parameter value of customer data base and send into respectively in the register of PLC, concrete default parameters: the pressure fan rotating speed upper limit 100%, pressure fan rotating speed lower limit 70%, 24 ℃ of the return air temperature upper limits, 18 ℃ of return air temperature lower limits, 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 operation have deviation, can revise the deviation setting value by touch-screen equally and refresh in the register that is kept at PLC, return main program if zero deflection finishes call subroutine;

Described logic control main program program circuit is as follows:

After carrying out above-mentioned step 1 to three, chain logic start and stop air-conditioner device how next, specific procedure is as follows:

After A, the mode decision, the control setup parameter subprogram different according to different mode invocations;

After B, program are accepted starting-up signal, connect water valve and air returning valve, and will set the aperture signal of telecommunication and send into respectively water valve, air returning valve;

Behind C, the Program time delay 5S, connect again new air-valve and exhaust valve, and will set the aperture signal of telecommunication and send into respectively air returning valve, exhaust valve;

Behind D, the Program time delay 60S, whether program detects the water valve open degree feedback feedback, if there is not feedback signal, connect alarm, program is ready and records water valve fault time, the feedback signal program detects other air returning valves again, newly whether air-valve, exhaust valve open degree feedback have feedback if having, if there is not the top process signal of the same execution of feedback just to connect the also record trouble time of reporting to the police, if the touch-screen of feedback demonstration aperture is arranged and enter next step;

E, program are confirming all to open in the situation connection pressure fan run signal by above-mentioned open degree feedback signal detection, time-delay 5S connects the return fan run signal again, if normal operation will move feedback and pass to the touch-screen demonstration, otherwise program is awaited orders and alarm logging;

Behind F, pressure fan, the return fan normal operation, routine call air quantity control subprogram;

G, after air quantity control subprogram is returned, follow the pressure fan controlled quentity controlled variable with return fan and drive pressure fan, the return fan converting operation, touch-screen shows air quantity, time-delay 30S, program in service detects water valve all the time, air returning valve, new air-valve, the aperture situation of exhaust valve, whether all valve area feedbacks of delay judgement are consistent with setting, if wherein any one air-valve is inconsistent, at once out-of-blast machine and return fan operation, warning is awaited orders and is recorded this equipment fault time, program also detects pressure fan and return fan operation conditions simultaneously, when in case detection pressure fan or return fan have fault-signal, out of service and the alarm logging fault of horse back, so constantly cycle detection is until normal shutdown;

H, system closedown be out-of-blast machine, return fan first, closes water valve behind the time-delay 10S, closes all air-valves behind the 5S that delays time again, until water valve, air-valve are fed back to EP (end of program) in 0 o'clock;

Air quantity control subprogram flow process is as follows under described three kinds of patterns:

After carrying out described step 4, in chain unlatching pressure fan, the return fan situation, call air quantity control subprogram, under deterministic model, change adjusting pressure fan frequency converter rotating speed with return air temperature, realize the variable air rate energy-saving run, concrete air quantity control divides to be freezed, ventilates, heats;

Refrigeration air quantity control subprogram process description:

A, call refrigeration mode air quantity control subprogram, if return air temperature between the setting district in 22～28 ℃ of scopes, return air temperature proportional linearity correspondence 70～100% or 14～20mA controlled quentity controlled variable drive pressure fan frequency control operation and return fan is followed the pressure fan air quantity;

B, subprogram are calculated air output method adoption rate adjusting+condition restriction, refrigeration functional expression y=70+Kx (Δ t),

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

Behind C, the time-delay 2S when return air temperature during greater than 28 ℃ of cappings, air quantity is with 100% or 20mA output, delayed time 5 minutes, if discharge quantity of fan or 100% output, system is judged as the precooling pattern, and call precooling pattern control setup parameter subprogram, readjust water valve, air returning valve, new air-valve, exhaust valve aperture;

Behind D, the time-delay 2S when return air temperature during less than 22 ℃ of lower limits of setting, air output is with 70% or 14mA output, delayed time 5 minutes, if discharge quantity of fan or 70% output, system changed variable water volume into and decides air quantity and control from originally deciding water yield variable air rate, and system still keeps 70% air quantity, call the water valve control setup parameter subprogram under this pattern, to water valve control setting value assignment, with the aperture of wind pushing temperature variation proportional water valve, 0～100% output of water valve aperture;

Ventilation volume control subprogram process description:

A, call air vent mode air quantity control subprogram, if return air temperature between the setting district in 24～26 ℃ of scopes, return air temperature proportional linearity correspondence 70～90% or 14～18mA controlled quentity controlled variable drive pressure fan frequency control operation, return fan is more with the pressure fan air quantity;

Behind B, the time-delay 2S when return air temperature during greater than 26 ℃ of cappings, the air quantity of pressure fan and return fan with 100% or 20mA export;

Behind C, the time-delay 2S when return air temperature when setting 24 ℃ of lower limits, the air quantity of pressure fan and return fan with 70% or 14mA export;

Heat air quantity control subprogram process description:

A, call heating mode air quantity control subprogram, if return air temperature between the setting district in 18～24 ℃ of scopes, return air temperature proportional linearity correspondence 100～70% or 20～14mA controlled quentity controlled variable drive pressure fan frequency control operation and return fan is followed the pressure fan air quantity;

B, subprogram are calculated air output method adoption rate adjusting+condition restriction, refrigeration functional expression y=100-K.x (Δ t),

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

Behind C, the time-delay 2S when return air temperature during less than 18 ℃ of lower limits of setting, the air quantity of pressure fan and return fan is with 100% or 20mA output, delayed time 5 minutes, if discharge quantity of fan or 100% output, 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;

Behind D, the time-delay 2S when return air temperature during greater than 24 ℃ of cappings, the air output of pressure fan and return fan is with 70% or 14mA output, delayed time 5 minutes, if discharge quantity of fan or 70% output, system changed variable water volume into and decides air quantity and control from originally deciding water yield variable air rate, system still keeps 70% air quantity, calls the water valve control setup parameter subprogram under this pattern, changes 0～100% output of ratio water adjusting valve aperture according to wind pushing temperature;

Control setup parameter second order subroutine flow process is as follows under described precooling, the preheating mode:

A, in refrigeration, heat under the control of two pattern air quantity control subprograms, if discharge quantity of fan or 100% is exported, 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%;

When if C default value and working control have deviation, can revise by touch-screen, be kept at after refreshing in the PLC register, return higher level's subprogram and again drive and carry out water valve, aperture that air-valve is new;

Described water valve control setup parameter second order subroutine flow process is as follows:

A, in refrigeration, heat under the control of two pattern air quantity control subprograms, if discharge quantity of fan or 70% output, system changed variable water volume into and decides air quantity and control from originally deciding water yield variable air rate;

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

When if C default value and working control have deviation, can revise by touch-screen, be kept at the register of PLC after refreshing, return higher level's subprogram, system changes ratio water adjusting valve 0～100% aperture with wind pushing temperature;

The fault detection program flow process is as follows:

System carries out after the described step 4 to seven, each scan period checkout equipment running status, and specific procedure is as follows:

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

Behind B, pressure fan, the return fan converting operation, each scan period is detected pressure fan, return fan running status, in case detect when fault is arranged at once halt system operation and alarm logging content fault time.

Behind C, pressure fan, the return fan converting operation, each scan period time-delay detects new wind, whether return air filter screen pressure difference switch is connected, in case there is the connection signal system not shut down, alarm logging content fault time.

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