CN202275532U - Intelligent fault examining system for central air conditioner and miniature cold storage warehouse - Google Patents
Intelligent fault examining system for central air conditioner and miniature cold storage warehouse Download PDFInfo
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- CN202275532U CN202275532U CN2011202138554U CN201120213855U CN202275532U CN 202275532 U CN202275532 U CN 202275532U CN 2011202138554 U CN2011202138554 U CN 2011202138554U CN 201120213855 U CN201120213855 U CN 201120213855U CN 202275532 U CN202275532 U CN 202275532U
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Abstract
The utility model provides an intelligent fault examining system for a central air conditioner and a miniature cold storage warehouse. The intelligent fault examining system comprises computers, an exchanger and a programmable logic controller (PLC). The computers carry out communication with the exchanger through an Ethernet, and the PLC carries out data exchange with the computers. The intelligent fault examining system is characterized by further comprising a practical training module, a system converting module, a signal feeding-back module and a fault generating module. The PLC collects a feedback signal from the signal feeding-back module and outputs a conversion setting relay for controlling the system converting module and a fault setting relay of the fault generating module; different control loops are connected and disconnected through a plurality of contacts of the conversion setting relay, so that a plurality of connected control loops form a selected electric control system; and fault points are connected and disconnected in a combined electric control system for the central air conditioner and the miniature cold storage warehouse through a touch switch of the fault setting relay, so as to achieve the control on the fault points.
Description
Technical field:
The utility model relates to fields such as refrigeration plant maintenance technique, electrical engineering circuit detection technique, and the central air conditioner and the miniature cold storage that relate generally in the refrigeration plant maintenance technique detect the maintenance technique field.This system is mainly used in the training of the fault diagnosis eliminating of simulation central air conditioner and miniature cold storage.
Background technology:
At present in each big universities and colleges and training centers run by social sectors; All need to supply student or Student Training's equipment; Because effects limit such as prices such as large-scale refrigeration plant such as central air conditioner, miniature cold storage are expensive, floor area is big, add to be used for the student or student's on-site training damages easily that cost is too high.At present can solve a part of problem basically with the emulation checking system, its form is: hardware occurs with the form of examination cabinet, and supporting corresponding examination software.The examination cabinet back side has disposed faulty circuit has been set, and the computing machine of examination software is installed and faulty circuit communication, the break-make of control fault point are set.Examination software has the teacher to hold the end with the student, and teacher computer must be networked with student machine.The set-up mode of fault is to hold software to set exercise question with the teacher; Be sent to student machine to exercise question through networking mode, the examinee is after login on the student machine, and the data in the exercise question just are sent to the examination cabinet; The examinee must accomplish examination in software dictates in the time, time one hands in an examination paper to software automatically.During examination, the examinee carries out testing and diagnosing with instrument on the examination circuit, find out the trouble spot, fixes a breakdown with student machine, till entire circuit ability operate as normal.Also realize a cabinet multisystem in the comparatively advanced emulation checking system, be combined in multiple electric-control system in the examination cabinet, because a lot of identical control circuits are arranged in the various refrigeration plant electric-control system; Utilize these circuit can shared characteristics; Auxiliary relay is set on the line, and when in student's end, switching to difference examination circuit, these auxiliary relays just carry out " switching " combination again; The examination circuit is formed with the student hold corresponding circuit, reduced equipment cost like this.But these emulation checking systems also have the place of many deficiencies, show: contact fault and the winding coil fault that can not analog component of components and parts or refrigeration annex just protected in the equipment failure of simulation; And can not analog machine overprotection fault; These problems can make the emulation checking system of refrigeration plant such as central air conditioner, miniature cold storage etc. more perfect after solving, closing to reality system more on the pattern, and the effect of training can be more remarkable, and the intelligent degree of emulation checking system can be higher.
Summary of the invention:
For overcome present refrigeration plant for example the device category of central air conditioner, the existing analog machine fault of miniature cold storage emulation checking system incomplete, can not analog machine overprotection fault etc. deficiency; The utility model provides a kind of central air conditioner and the intelligent fault checking system of miniature cold storage; Comprise computing machine, switch, programmable controller PLC; Pass through Ethernet and switch communication between the computing machine; Programmable controller PLC and computing machine carry out exchanges data, it is characterized in that: also comprise real standard module, system's modular converter, signal feedback module, fault generation module.This checking system not only possesses the function of present emulation checking system, comprises electric-control system and computing machine communication, by the function of computer control electric-controlled system fault point; Realize the function of central air conditioner and the conversion of miniature cold storage control circuit by computing machine output control; The function of simulation refrigeration annex, protection components and parts contact fault; And possess the function that present emulation checking system is short of, comprise the winding coil fault function of analog component; Analog machine overprotection fault function.
The utility model solves the technical scheme that its technical matters adopted: checking system is made up of computing machine, switch and practical traning platform; Inner programmable controller PLC, real standard module, system's modular converter, signal feedback module, the fault generation module etc. installed of practical traning platform; Carry out exchanges data through programmable controller PLC and computing machine; Realize the conversion of the control circuit of central air conditioner and miniature cold storage, the feedback signal of Acquisition Circuit, the break-make of control fault point etc.; Described PLC does not establish working procedure in inside, only plays the effect of acquired signal and output control.
The electric control system that above-mentioned real standard module comprises central air conditioner and miniature cold storage combination be arranged at each fault in this control system and a little fault is set the repeater contact switch is set and is used for the conversion that different control circuits change the repeater contact switch is set.
Above-mentioned system's modular converter comprises conversion repeater and control circuit and PLC digital output end is set; PLC and computing machine carry out exchanges data; The conversion instruction of the central air conditioner of receiving computer or the electric control system of miniature cold storage; The PLC digital output end is provided with " energising, the outage " of repeater coil through control transformation; Make a plurality of conversions on the electric control system loop that is connected on central air conditioner and miniature cold storage combination that repeater contact switching Different control loop is set, let many control loops of on constitute selected electric control system.
Above-mentioned signal feedback module comprises device control relay signal feedback contact switch, protection components and parts and refrigeration annex reset switch and feedback line and PLC digital input end.Device control relay signal feedback line is consistent with circuit common wiring lead-in wire way; The circuit of protection components and parts or refrigeration annex such as high voltage protective device, oil pressure difference protector, electrothermal relay reset signal is recessive; Said recessiveness promptly links to each other with the hand-reset button at protection components and parts set inside switch; The internal switch lead-in wire is directly drawn from the protection components and parts back side; The central dividing plate that passes practical traning platform is up to the back side, and the circuit that can't view from the practical traning platform front is not because of described protection components and parts or the refrigeration annex circuit that resets exists in true electric-control system; So handle with recessive means, to guarantee the authenticity of checking system.Feedback signal and reseting signal line are connected on the digital input end of PLC; Be transferred to PLC to the closure/cut-off signal of device control relay startup/stop signal, reset switch; PLC and computing machine carry out exchanges data, after the computer program computing, make further control.
Above-mentioned fault generation module comprises fault repeater and control circuit and PLC digital output end is set; PLC and computing machine carry out exchanges data; The trouble spot steering order of receiving computer; The PLC digital output end is provided with " energising, the outage " of repeater coil through control fault; Make fault that contact switch switching trouble spot in the electric control system of central air conditioner and miniature cold storage combination of repeater is set, realize trouble spot control the electric control system of central air conditioner and miniature cold storage combination.
Above-mentioned fault is provided with the setting of repeater contact switch in the electric control system of central air conditioner and miniature cold storage combination, comprises that the contact that fault is provided with repeater is connected on the control loop, is provided with a little as the line broken circuit fault; The contact that fault is provided with repeater and protection components and parts, refrigeration annex contact leads are parallelly connected, and protection components and parts, the contact virtual connection of refrigeration annex are provided with a little with freeze annex contact fault and corresponding overprotection fault as simulation protection components and parts on circuit; Go between components and parts winding coil leading-out terminal to binding post; The insulation course of not strip off electric wire; Directly bore a hole behind at binding post and guide to the practical traning platform back side to electric wire, corresponding fault is provided with the contact of repeater in the series connection, causes the wiring of binding post place again; From outward appearance components and parts winding coil leading-out terminal lead-in wire is directly to be connected on the binding post; Into and out of line end restriction is set at the components and parts winding coil and detects, can only detect into and out of the binding post place that line causes at it during the components and parts winding coil, the break-make analog component winding coil fault of repeater contact is set according to the fault of series connection.
Above-mentioned fault generation module is to the trouble spot control of the electric control system of central air conditioner and miniature cold storage combination; Comprise that specifically the instruction through computing machine makes PLC digital output end output control corresponding; The control corresponding failure is provided with repeater coil " energising, outage ", and the fault of the abort situation series connection in the control loop is provided with repeater contact switch " switching " and realizes the control to line broken circuit fault, components and parts winding coil fault; Described components and parts winding coil can comprise the winding coil of device control relay, auxiliary reclay, the time relay, solenoid valve, transformer; Also comprise through computer instruction and make PLC digital output end output control corresponding; The corresponding fault of control is provided with repeater coil " energising, outage "; Make the repeater contact switch " switching " that is connected in parallel on protection components and parts, the refrigeration annex contact realize simulation protection components and parts and refrigeration annex contact fault and equipment overprotection fault, described components and parts can comprise high voltage protective device, low-voltage variation device, oil pressure difference protector, temperature controller, compressor high-temperature protector, anti-freeze protector, air pressure difference protector, chilled water water flow switch, chilled water water flow switch, electrothermal relay with the refrigeration annex.
Above-mentioned equipment overprotection fault is a PLC collecting device pilot relay operation feedback signal, is transferred to computing machine; Computing machine according to factor computings such as the situation that is provided with of feedback signal, fault, working times after output order, make PLC digital output end output control corresponding, the control corresponding failure is provided with the repeater coil electricity; Making the fault that is connected in parallel on corresponding protection components and parts, the refrigeration annex contact that the repeater normally closed contact is set breaks off; The control loop of equipment opens circuit, analog machine overprotection fault, and PLC gathers protection components and parts or refrigeration annex reset signal; Be transferred to computing machine; After Computing, export command adapted thereto, make PLC digital output end output control corresponding, the control corresponding failure is provided with the repeater coil blackout; It is closed to make the fault that is connected in parallel on corresponding protection components and parts, the refrigeration annex contact that the repeater normally closed contact is set, and simulation protection components and parts, refrigeration annex contact reset.
The beneficial effect of the utility model is: computing machine is provided with repeater through the PLC control fault, and then control fault is provided with the contact switch " switching " of repeater, the fault setting and the eliminating of realization central air conditioner or miniature cold storage electric control system; Through conversion the contact switch of repeater is set, combines central air conditioner and miniature cold storage electric control system, save cost and space; Central air conditioner and miniature cold storage control circuit adopt true electric control circuit; The examination exercise question is determined by supporting examination software, by this software automatic scoring etc.This utility model not only possesses the function of present emulation checking system, possesses the function of the winding coil fault of analog component simultaneously; And the signalization feedback module, make full use of PLC image data function, propose overprotection fault fully in conjunction with computer software module.
Description of drawings:
Below in conjunction with accompanying drawing and embodiment the utility model is further specified.
Fig. 1 is the checking system structural principle block diagram that the utility model combines supporting examination software;
Fig. 2 is the practical traning platform outside drawing of the utility model;
Fig. 3 is the inner positive device layout figure of practical traning platform;
Fig. 4 is the inner back side device layout figure of practical traning platform;
Fig. 5 is a practical traning platform front levels operation panel vertical view;
Fig. 6 is the power supply control chart of practical traning platform;
Fig. 7 is that model is FX
2NThe Mitsubishi PLC primary module wiring diagram of-48MR;
Fig. 8 is that model is FX
2NThe Mitsubishi PLC expansion module wiring diagram of-16EYR;
Fig. 9 is high voltage protective device reset signal transmission principle figure;
Figure 10 is the circuit theory diagrams of real standard module;
Figure 11 is the schematic diagram that pilot relay KM1 winding coil fault is set;
Figure 12 is the special-purpose central air conditioner main circuit schematic diagram of student;
Figure 13 is the special-purpose air-valve actuator control principle figure of student;
Figure 14 is the special-purpose central air conditioner electric control circuit schematic diagram of student;
Figure 15 is the special-purpose miniature cold storage main circuit schematic diagram of student;
Figure 16 is special-purpose freezer storehouse door, water inlet well heater control principle figure of student;
Figure 17 is the special-purpose miniature cold storage electric control circuit schematic diagram of student.
Among the figure:
3001 Stud Terminal row? 4001. Trunking? 4002. Trunk group? 4003 Mitsubishi PLC? 4004. Parallel Lines terminal? 6001. Lighting tubes? 6002. Cooling fan? 9001. Reset button? 9002. Built-in switch ? 9003. Taichung interval training board? 1101. terminal 1102. converted the terminal? 1103.KM1 windings into the line terminal? 1104.KM1 windings outlet terminal? 1201. cooling tower fan motor? 1202. cooling pump motor? 1203. frozen pump motor? 1204. compressor motor? 1205 blower motor? 1206 Wind cabinet heaters 1207. Fengkuei humidifier? 1301. return damper actuator? 1302 New damper actuator? 1501. refrigerator cooling tower fan motor? 1502. refrigerator cooling pump motor? 1503. refrigerator cooler motor? 1504. refrigerator compressor motor? 1505. refrigerator defrost heater? 1601. door heater 1602. pick outlet heater
Embodiment:
In Fig. 1; Functions such as the teacher holds software that teacher's login, student-directed are arranged, organizes examination paper, examination hall monitoring, managing test paper; And can derive examination overall scores list with the Excel form, teacher computer is communicated by letter with student machine with switch through Ethernet, and the teacher holds software and student to hold between the software to carry out exchanges data through SQL database; The student holds software to have the student to login, check and change that central air conditioner and miniature cold storage analogue system, fault are got rid of, checked excess time, function such as hand in an examination paper; Student machine through with the exchanges data of Mitsubishi PLC, realize the conversion of the control circuit of central air conditioner and miniature cold storage, the break-make of control fault point; The feedback signal of Acquisition Circuit etc.; Mitsubishi PLC through the conversion among the control repeater crowd repeater is set, fault is provided with the conversion that repeater is realized central air conditioner and miniature cold storage electric control system, control of trouble spot etc., and the element device of gathering real standard module moves feedback signal and reset signal.
In Fig. 2; Practical traning platform is a principle to make things convenient for detecting operation on the structure externally; Just, the back side installs door, back gate locks, when examination, locking prevents that exercise question from leaking; Various pilot lamp and action button are installed on the levels operation panel of front, when real standard the operator be sitting in the practical traning platform front just need not move can detecting operation to all devices, components and parts.
In Fig. 3; Inner positive components and parts and the control circuit that mainly comprises real standard module of practical traning platform; Also comprise SR and the components and parts feedback contact and the feedback line thereof etc. of signal feedback module, do not comprise main circuit and motor, well heater, humidifier, actuator etc.Component down-lead to post row (3001) is connected on the binding post, and the line between the components and parts is through coming line between post row (3001) binding post.Components and parts are provided with restriction into and out of line end and detect; Can only detect into and out of the binding post place that line causes at components and parts; From the surface; Components and parts into and out of line end be consistent at components and parts into and out of the binding post place testing result that line causes, detect into and out of line end but limited at components and parts, components and parts contact, winding coil fault can conveniently be set.The various pilot lamp on the levels operation panel of front and the line of switch cause below post row (3001) of the inner front of practical traning platform, so that detect, the Chinese noun of institute's capitalization of mark and digital correspondence is like QF: air switch among the figure; FU: fuse; DP: low-voltage variation device; SP: high voltage protective device; OP: oil pressure difference protector; WJ: temperature controller; WT1: compressor high-temperature protector; WT2: anti-freeze protector; DPS: air pressure difference protector; SL1: chilled water water flow switch; SL2: chilled water water flow switch; KM: exchange contact-relay; FR: electrothermal relay; KT: the time relay; RSJ: defrosting timer; SV: solenoid valve; KA1: auxiliary reclay; KA2: air-valve pilot relay; TC: transformer.
In Fig. 4, the inner back side of practical traning platform mainly comprises the stimulus part of programmable controller PLC, system's modular converter, fault generation module and signal feedback module.Concrete erecting equipment has Mitsubishi PLC (4003), comprises a primary module and an expansion module, and the primary module model is FX
2N-48MR, the expansion module model is FX
2N-16EYR, primary module is through communication cable and computing machine communication.Repeater crowd (4002) comprises 6 conversions repeater is set, and 38 faults are provided with repeater, 1 power supply signal feedback repeater and 1 repeater that control electromagnetic valve is switched on separately.Real shunt circuit circuit of instructing module is caused circuit parallel connection terminal (4004) locate wiring, can reduce the wiring amount of the inner front connection post of practical traning platform.Practical traning platform inner just, the wire casing (4001) of back side circuit cabling is installed in the back side, makes the components and parts installation site of positive real standard module compact, saves the space, makes whole practical traning platform advantages of small volume, is convenient to operator's detecting operation.
In Fig. 5, the levels operation panel can be placed circuit tester, makes things convenient for detecting operation.Pilot lamp on the panel and switch institute target capitalization and numeral corresponding Chinese noun is like HY0: power light; HR1: central air conditioner circuit indicator; HR2: miniature cold storage circuit indicator; HG: equipment operation pilot lamp; SB: point driving switch; K: rotary switch; SA: SS.
In Fig. 6; The power supply of 220V inserts; Through many loop parallel connections after the air switch 1QF, illumination light pipe (6001) wherein, a radiator fan (6002) through air switch 3QF control practical traning platform through air switch 2QF control practical traning platform; Article one, guide the Mitsubishi PLC power end into through air switch 5QF, fuse 1FU, the last item is guided real standard modular power source end into through three-phase air switch 4QF.Three-phase air switch 4QF only uses a wherein phase switch, is the control for the main circuit of simulating the utility model with the three-phase air switch here.Repeater 41KA detects three-phase air switch 4QF closure/disconnection, transfers signals to Mitsubishi PLC then.
In Fig. 7 and Fig. 8, Mitsubishi PLC and repeater crowd's the control relation and the object of signals collecting have been reflected.The winding coil of box indicating repeater.The primary module of Mitsubishi PLC and expansion module must connect as one with data line.The 220V power supply is infeeded by L3, N end; Be connected on Mitsubishi PLC L, N holds to Mitsubishi PLC that working power is provided, be attempted by the Mitsubishi PLC primary module COM1-5 end, expansion module the COM1-2 end and receive the leading-out terminal of the repeater of Mitsubishi PLC control, for the Mitsubishi PLC output terminal provides the control power supply; By Mitsubishi PLC primary module digital output end Y0 and conversion repeater 1KA1,1KA2,1KA3,1KA4,1KA5,1KA6 and control circuit thereof are set and form system's modular converter; Mitsubishi PLC and computing machine carry out exchanges data, and system's conversion instruction of receiving computer makes Mitsubishi PLC output terminal Y0 output control; Control " energising, outage " that 6 conversions are provided with the repeater coil; In the electric control system of central air conditioner and miniature cold storage combination, form correspondent control circuits, when Y0 output " disconnection " signal, 6 conversions are provided with the repeater coil blackout; Convert the electric control system of combination into the central air conditioner electric control system; When Y0 had output " conducting " signal, 6 conversions were provided with the repeater coil electricity, converted the electric control system of combination into the miniature cold storage electric control system.By all digital output end of Mitsubishi PLC primary module digital output end Y2, Y3, Y4, Y5, Y6, Y7, Y10, Y11, Y12, Y13, Y14, Y15, Y16, Y17, Y20, Y21, Y22, Y23, Y24, Y25, Y26, Y27 and expansion module and fault repeater 3KA, 4KA, 5KA, 6KA, 7KA, 8KA, 9KA, 10KA, 11KA, 12KA, 13KA, 14KA, 15KA, 16KA, 17KA, 18KA, 19KA, 20KA, 21KA, 22KA, 23KA, 24KA, 25KA, 26KA, 27KA, 28KA, 29KA, 30KA, 31KA, 32KA, 33KA, 34KA, 35KA, 36KA, 37KA, 38KA, 39KA, 40KA and control circuit thereof are set and form the fault generation module; Mitsubishi PLC and computing machine carry out exchanges data; The dependent instruction of receiving computer; Make certain output terminal output control; Control " energising, outage " of corresponding repeater coil, in real standard module, form corresponding fault or fix a breakdown.Mitsubishi PLC primary module output terminal Y1 is through control repeater 2KA, thus the loop that control electromagnetic valve is switched on separately.By the device control of Mitsubishi PLC primary module digital input end X0, X1, X2, X3, X4, X5, X6, X7, X10, X11, X12, X13, X14, X15, X16, X17 and real standard module exchange one group of normally opened contact and electrothermal relay FR1, FR2, FR3, FR4, FR5, FR6, the high voltage protective device SP of contact-relay KM1, KM2, KM3, KM4, KA2, KM5, KM6, KM7, built-in reset switch and the feedback line thereof of oil pressure difference protector OP formed the signal feedback module.By the real feedback signal of instructing the auxiliary reclay KA1 of module that input end X20 gathers, be to guarantee the solenoid valve security of energising separately in order to simulate.The feedback signal of the repeater 41KA that is gathered by input end X21 is in order to detect the main circuit energising situation of simulation.Working procedure is not established in Mitsubishi PLC inside, only plays the effect of acquired signal and output control.
In Fig. 9, be the running that reset signal with high voltage protective device SP is transmitted as clear signal feedback module the example.High voltage protective device SP carries out the inside repacking; Link to each other with SR (9001) in set inside built-in switch (9002); Built-in switch (9002) closure when pressing SR (9001); Built-in switch (9002) is broken off when unclamping SR (9001), and two lead-in wires of built-in switch (9002) are directly drawn from the high voltage protective device SP back side, pass practical traning platform central dividing plate (9003) up to the practical traning platform back side; Article two, lead-in wire is connected on the COM end and X16 end of Mitsubishi PLC respectively, is transferred to Mitsubishi PLC to the closure/cut-off signal of built-in switch (9002) through pressing/unclamp SR (9001).Because of the high voltage protective device SP circuit that resets does not exist in true electric-control system, so with recessive means processing, to guarantee the authenticity of checking system.Oil pressure difference protector OP, electrothermal relay FR1, FR2, FR3, FR4, FR5, FR6 equally through repacking back in the set inside built-in switch, pass practical traning platform central dividing plate (9003) up to the practical traning platform back side, two lead-in wires of each components and parts are connected on the COM end of Mitsubishi PLC shown in Figure 7 respectively and hold with X17, X10, X11, X12, X13, X14, X15.The signal feedback circuit of device control relay K M1, KM2, KM3, KM4, KA2, KM5, KM6, KM7 is consistent with circuit common wiring lead-in wire way, and COM end and X0, X1, X2, X3, X4, X5, X6, X7 that each device control relay normally open contact two ends are connected on Mitsubishi PLC shown in Figure 7 respectively hold.Closure/the cut-off signal of the reset switch of the startup/stop signal of each device control relay of Mitsubishi PLC collection and electrothermal relay FR1, FR2, FR3, FR4, FR5, FR6, high voltage protective device SP, oil pressure difference protector OP; Carry out exchanges data with computing machine then; After the computer program computing, make further control.
Real standard module by the electric control system of central air conditioner and miniature cold storage combination be arranged at each fault in this control system and a little fault is set the repeater contact switch is set and is used for conversion that different control circuits change and the repeater contact switch is set forms.Shown in figure 10, the numeral among the figure is a wire size, the winding coil of box indicating components and parts.The control loop of device control relay K M1 of blower fan of cooling tower motor or freezer blower fan of cooling tower motor that the electric control system of central air conditioner and miniature cold storage combination is arranged among the figure; Comprise electrothermal relay FR1 contact switch in the loop; The control loop that the device control relay K M2 of cooling pump motor or freezer cooling pump motor is arranged; Comprise electrothermal relay FR2 contact switch in the loop; The control loop of the device control relay K M3 of refrigerating water pump motor or freezer air-cooler motor is arranged, comprise electrothermal relay FR3 contact switch in the loop, have compressor electric motor or freezer compressor electric motor to start timing circuit; Comprise chilled water water flow switch SL1 and chilled water water flow switch SL2 contact switch, time relay KT, auxiliary reclay KA1 in the loop; Transformer TC control loop is arranged, defrosting timer RSJ control loop is arranged, the device control relay K M4 control loop of compressor electric motor or freezer compressor electric motor is arranged; Comprise electrothermal relay FR1, high voltage protective device SP, low-voltage variation device DP, oil pressure difference protector OP, temperature controller WJ, compressor high-temperature protector WT1, anti-freeze protector WT2 contact switch in the loop; The control loop that solenoid valve SV is arranged has air-valve actuator pilot relay KA2 control loop, and the control loop of the pilot relay KM5 of pressure fan motor or freezer defrosting well heater is arranged; Comprise air pressure difference protector DPS, electrothermal relay FR1 in the loop; The device control relay K M6 control loop of wind heater counter is arranged, comprise electrothermal relay FR6 in the loop, the pilot relay KM7 control loop of wind cabinet humidifier is arranged.On the loop again on the serial or parallel connection fault repeater contact is set; Comprise the normally closed contact that fault is provided with repeater 3KA, 4KA, 5KA, 6KA, 7KA, 8KA, 9KA, 10KA, 11KA, 12KA, 13KA, 14KA, 15KA, 16KA, 17KA, 18KA, 19KA, 20KA, 21KA, 22KA, 23KA, 24KA, 25KA, 26KA, 27KA, 28KA, 29KA, 30KA, 31KA, 32KA, 33KA, 34KA, 35KA, 36KA, 37KA, 38KA, 39KA, 40KA, and conversion is provided with the repeater contact and comprises 4 normally closed contacts that conversion is provided with 4 normally closed contacts, the 1KA2 of repeater 1KA1,3 normally closed contacts of 1KA3,4 normally opened contacts of 1KA4,4 normally opened contacts of 1KA5,3 normally opened contacts of 1KA6 and form real standard module jointly.
Conversion is provided with the setting of repeater contact switch in real standard modular circuit; Shown in figure 10; The control loop of the control loop of blower fan of cooling tower Electric Machine Control relay K M1, cooling pump Electric Machine Control relay K M2; Identical in the electric-control system of central air conditioner and miniature cold storage, so do not establish conversion the repeater contact switch is not set; Central air conditioner refrigerating water pump motor control loop and miniature cold storage air-cooler motor control loop have common factor; But it is incomplete same; When exchanging contact-relay KM3 as the device control relay of central air conditioner refrigerating water pump motor, available point driving switch 3SB2 starts, 3SB1 stops; During as the device control relay of miniature cold storage air-cooler motor; Start/stop with rotary switch K2; When being defrosting well heater pilot relay KM5 startup with rotary switch startup purpose; The pilot relay KM5 normally closed contact that is connected on a little in 31,32 breaks off; The device control relay of air-cooler motor quits work, and defrosting well heater pilot relay KM5 is when quitting work, and the device control relay K M3 that is connected on a little the closed air-cooler motor of pilot relay KM5 normally closed contact in 31,32 can start automatically; So in point 1,27, point connects conversion in 31,32 repeater 1KA1 normally closed contact is set, connect conversion in the point 38,46 and repeater 1KA4 normally opened contact is set solves; The control loop of auxiliary reclay KA1 is controlled by device control relay K M3 in the central air conditioner electric control system; Not controlled by rotary switch K2; Promptly opposite in the miniature cold storage electric control system; So in point 44,47, point connects conversion in 48,49 repeater 1KA1 normally closed contact is set, in the point 44,48, connect conversion in the point 46,49 and repeater 1KA4 normally opened contact is set solves; Do not have the chilled water water flow switch in the miniature cold storage electric control system, repeater 1KA4 normally opened contact is set solves so connect conversion in 51,52 at point; Transformer TC is controlled by auxiliary reclay KA1 normally opened contact in the miniature cold storage electric control system; Promptly opposite in the central air conditioner electric control system; So connect conversion in 1,500 repeater 1KA2 normally closed contact is set, connects conversion in the point 60,500 and repeater 1KA5 normally opened contact is set solves at point; In the central air conditioner electric control system, there is not defrosting timer RSJ; Do not receive the control of defrosting timer RSJ; But the device control relay K M5 of pressure fan motor in the miniature cold storage electric control system as freezer defrosting well heater pilot relay; Directly receive the control of defrosting timer RSJ; So in point 60,64, point connects conversion in 64,84 repeater 1KA2 normally closed contact is set, in the point 60,62, in the point 60,63, connect conversion in the point 63,84 repeater 1KA5 normally opened contact is set, connect conversion in the point 65,104 and repeater 1KA6 normally opened contact is set solves; Do not have anti-freeze protector WT2 in the miniature cold storage electric control system, repeater 1KA6 normally opened contact is set solves so connect conversion in 76,77 at point; Do not have the control loop of device control relay K M7 of control loop, wind cabinet humidifier of crawl control loop, wind heater counter pilot relay KM6 of device control relay K M5 of control loop, the pressure fan motor of air-valve actuator pilot relay KA2 in the miniature cold storage electric control system, be provided with in repeater 1KA2 normally closed contact, the point 1,97, connect conversion in the point 1,113 and repeater 1KA3 normally closed contact is set solves so in point 1,87, connect conversion.The conversion that conversion in central air conditioner circuit indicator HR1 and the miniature cold storage circuit indicator HR2 receptor site 1,131 is provided with in repeater 1KA3 normally closed contact, the point 1,132 is provided with the control of repeater 1KA6 normally opened contact, as the demonstration of electric control system kind.
The function situation of system's modular converter; When computing machine output converts the instruction of central air conditioner electric control system into; After Mitsubishi PLC shown in Figure 7 receives this instruction; Primary module digital output end Y0 exports " disconnection " signal; Conversion is provided with repeater 1KA1,1KA2,1KA3,1KA4,1KA5,1KA6 coil blackout, and the contact of said repeater keeps state as shown in Figure 10, makes device control relay K M1, KM2, KM3, KM4, KA2, KM5, KM6, KM7 control loop, auxiliary reclay KA1 control loop, transformer TC control loop, the solenoid valve SV control loop of on constitute the central air conditioner electric control system.Conceal the contact switch that fault is provided with repeater, conceal central air conditioner circuit indicator HR1 and miniature cold storage circuit indicator HR2 control loop again and promptly form the special-purpose central air conditioner electric control circuit schematic diagram of student shown in figure 14.When computing machine output converts the instruction of miniature cold storage electric control system into; After Mitsubishi PLC shown in Figure 7 receives this instruction; Primary module digital output end Y0 exports " conducting " signal; Conversion is provided with repeater 1KA1,1KA2,1KA3,1KA4,1KA5,1KA6 coil electricity; The normally opened contact that all conversions shown in figure 10 are provided with repeater is closed, normally closed contact breaks off, and makes pilot relay KM1, KM2, KM3, KM4, KM5 control loop, auxiliary reclay KA1 control loop, transformer TC control loop, solenoid valve SV control loop, the defrosting timer RSJ control loop of on constitute the miniature cold storage electric control system.Conceal the contact switch that fault is provided with repeater, conceal central air conditioner circuit indicator HR1 and miniature cold storage circuit indicator HR2 control loop again and promptly form the special-purpose miniature cold storage electric control circuit schematic diagram of student shown in Figure 17.
Fault is provided with the setting of repeater contact switch in the electric control system of central air conditioner and miniature cold storage combination; Shown in figure 10; Fault is provided with the normally closed contact of repeater 3KA, 5KA, 7KA, 11KA, 12KA, 19KA, 21KA, 37KA, 38KA, 39KA, 40KA in the series connection in point 4,5, in the point 18,23, in the point 32,33, in the point 52,53, in the point 500,61, in the point 77,78, in the point 85,501, in the point 88,89, in the point 104,105, in the point 117,118, in the point 126,127, is provided with a little as the line broken circuit fault; The contact virtual connection of protection components and parts and refrigeration annex such as electrothermal relay FR1, FR2, FR3, FR4, FR5, FR6, high voltage protective device SP, low-voltage variation device DP, oil pressure difference protector OP, temperature controller WJ, compressor high-temperature protector WT1, anti-freeze protector WT2, air pressure difference protector DPS, chilled water water flow switch SL1, chilled water water flow switch SL2 is on circuit; Fault is provided with the normally closed contact of repeater 4KA, 6KA, 8KA, 20KA, 23KA, 24KA, 13KA, 14KA, 15KA, 17KA, 16KA, 18KA, 22KA, 9KA, 10KA in corresponding contact 9, N2 place, 21, N4 place, 35, N6 place, 80, N12 place, 107, N17 place, 120, N19 place, 66,67 places, 68,69 places, 70,71 places, 74,75 places, 72,73 places, 76,77 places, 97,98 places, 49,50 places, 51, the parallel connection of 52 places; Be provided with a little with refrigeration annex contact fault and corresponding equipment overprotection fault as simulation protection components and parts; Described virtual connection is meant two not stripping of insulatin of line layers that extract from the contact of protection components and parts or refrigeration annex; Directly be connected on the binding post; The other end parallel connection of two binding posts connects corresponding fault the repeater normally closed contact is set; The contact restriction of protection components and parts or refrigeration annex detects; Detect on the binding post that can only cause, with the accuracy of guaranteeing to detect at the contact line of protection components and parts or refrigeration annex; Fault is provided with repeater 25KA, 26KA, 27KA, 31KA, 33KA, 34KA, 35KA, 36KA, 29KA, 28KA, 32KA, 30KA normally closed contact in the series connection in the some M1,8 that device control relay K M1, KM2, KM3, KM4, KA2, KM5, KM6, KM7, auxiliary reclay KA1, time relay KT, solenoid valve SV, transformer TC secondary coil leading-out terminal connect, among the some M2,20, among the some M3,34, among the some M7,79, among the some M9, N15, among the some M10,106, among the some M11,119, among the some M12, N21, among the some M5, N9, among the some M4, N8, among the some M8, N14, among the some M6,24N, as being provided with a little of analog component winding coil fault.The way of analog component winding coil fault; With analog machine pilot relay KM1 winding coil fault is example; Shown in figure 11, wherein Figure 11 is the local physical cabling figure of Figure 10, and the binding post after the repacking (1102) is to remove the back side of the interior metal solidus part upper semisection of binding post; The solidus screw can be gone up in the front, and then makes a call to an aperture to the back side of the upper semisection of the peripheral insulator of binding post.Wire size is that 7 line is connected on binding post (1101) upper end; The lower end line of binding post (1101) is connected on the device control relay K M1 winding coil inlet wire binding post (1103), and KM1 winding coil outlet binding post (1104) line causes the upper end of the binding post (1102) after the repacking, the insulation course of not strip off line; Directly pass top, the peripheral insulator of binding post (1102) back side aperture after the repacking; Pass practical traning platform central dividing plate (9003) again,, be connected on the end that fault is provided with the normally closed contact of repeater 25KA up to the inner back side of practical traning platform; Label is M1; Label is that the other end line of 8 normally closed contact divides two roads, and one is returned the lower end that is connected on the binding post (1102) after the repacking, and wire size is 8; Another connects to other element device, locates to be provided with limiting and detecting device at KM1 winding coil inlet wire binding post (1103), KM1 winding coil outlet binding post (1104).See from the front; Device control relay K M1 winding coil turnover line is on the binding post (1102) that directly is connected on after binding post (1101), the repacking; KM1 winding coil turnover line binding post has been limited to detect, so when detecting the KM1 winding coil, can only locate to detect at the binding post (1102) after binding post (1101), the repacking.Break off if fault is provided with the normally closed contact of repeater 25KA, promptly simulate KM1 winding coil fault, otherwise expression KM1 winding coil is normal.
The function situation of fault generation module; Computing machine output is provided with fault and instructs and make Fig. 7, Mitsubishi PLC primary module shown in Figure 8 export " conducting " signal with the expansion module digital output end; The fault of controlled correspondence is provided with the repeater coil electricity; The series connection that makes correspondence shown in Figure 10 on the line, be connected in parallel on fault on protection components and parts or the refrigeration annex contact and the repeater normally closed contact is set breaks off analog line open circuit fault, protection components and parts or refrigeration annex contact fault, components and parts winding coil fault; Perhaps computing machine is gathered after the factor computings such as the situation that is provided with, working time of components and parts operation feedback signal, fault output and is embodied fault and instruct and make Fig. 7, Mitsubishi PLC primary module shown in Figure 8 export " conducting " signal with the expansion module digital output end according to Mitsubishi PLC; The fault of controlled correspondence is provided with the repeater coil electricity; Make the fault that is connected in parallel on protection components and parts or the refrigeration annex contact of correspondence shown in Figure 10 that the disconnection of repeater normally closed contact is set; Analog machine overprotection fault, described embodiment fault are meant that the overprotection fault is for example started shooting under given conditions and just can embody under the ruuning situation; Perhaps computing machine is according to protection components and parts or refrigeration annex reset signal, the time of shutdown and the operation of fixing a breakdown of Mitsubishi PLC collection; Output is fixed a breakdown and is made Fig. 7, Mitsubishi PLC primary module and expansion module digital output end shown in Figure 8 export " disconnection " signal; The fault of controlled correspondence is provided with the repeater coil blackout; The series connection that makes correspondence shown in Figure 10 on the line, being connected in parallel on fault on protection components and parts or the refrigeration annex contact, that the repeater normally closed contact is set is closed, accomplishes the operation of fixing a breakdown.
Details are as follows for the special-purpose drawing of student:
In Figure 12, pressure fan motor (1205) main circuit, air switch QF6, the control of device control relay K M6 normally opened contact, fuse F U6, wind heater counter (1206) main circuit of thermal protector FR6 protection, the device control relay K M7 normally opened contact that cooling pump motor (1202) main circuit, air switch QF3, the control of device control relay K M3 normally opened contact, fuse F U3, refrigerating water pump motor (1203) main circuit of thermal protector FR3 protection, air switch QF4, the control of device control relay K M4 normally opened contact, fuse F U4, compressor electric motor (1204) main circuit of thermal protector FR4 protection, air switch QF5, the control of device control relay K M5 normally opened contact, fuse F U5, the thermal protector FR5 that is protected by air switch QF1, the control of device control relay K M1 normally opened contact, fuse F U1, blower fan of cooling tower motor (1201) main circuit of thermal protector FR1 protection, air switch QF2, the control of device control relay K M2 normally opened contact, fuse F U2, thermal protector FR2 protects controlled, wind cabinet humidifier (1207) circuit of fuse F U7 protection constitutes the central air conditioner main circuit.For improving the security of checking system; The central air conditioner main circuit is not connected in the checking system, and circuit, air switch, fuse, blower fan of cooling tower motor (1201), cooling pump motor (1202), refrigerating water pump motor (1203), compressor electric motor (1204), pressure fan motor (1205), wind heater counter (1206), wind cabinet humidifier (1207) are not installed in the checking system among Figure 12.
In Figure 13; Transformer provides 24V power supply for this circuit; Come to control simultaneously the On/Off of air returning valve actuator (1301), new air-valve actuator (1302) through the air-valve actuator pilot relay KA2 closing of contact/disconnection; This circuit-line is not connected in the checking system, and air returning valve actuator (1301), new air-valve actuator (1302) are not installed in the checking system.
In Figure 14, numeral is a wire size, the winding coil of box indicating components and parts.To be real standard module be provided with the central air conditioner electric control circuit schematic diagram that uses to the real standard examination of student of specializing in that repeater contact switch, fault are provided with the repeater contact switch converting the control loop, the conversion that conceal disconnection under the central air conditioner electric control system pattern into to Figure 14; The control circuit that comprises a handpiece Water Chilling Units and a wind cabinet, the equipment that must control in the control circuit of handpiece Water Chilling Units comprises blower fan of cooling tower motor, cooling pump motor, refrigerating water pump motor, compressor electric motor, solenoid valve etc.Wherein the control loop of the device control relay K M1 of blower fan of cooling tower motor, cooling pump motor, refrigerating water pump motor, KM2, KM3 all starts/stops form with crawl, and circuit such as self-locking, overload protection, operation indication are set.The control loop of the device control relay of compressor electric motor adopts indirect delayed startup method; After the pilot relay KM1 of blower fan of cooling tower motor, cooling pump motor, refrigerating water pump motor, KM2, the KM3 winding coil energising contact switch closure and under the chilled water, the water flow switch SL1 of chilled water system, the normally closed condition of SL2; Through rotary switch K1 relay K start-up time T; Delay time one to auxiliary reclay KA1 is closed; All be in normal and chilled water temperature does not reach under the closed situation of design temperature temperature controller WJ at high voltage protective device SP, low-voltage variation device DP, oil pressure difference protector OP, high-temperature protector WT1, anti-freeze protector WT2, electrothermal relay FR4; The device control relay K M4 of compressor electric motor starts, and compressor pilot lamp HG4 is bright simultaneously starts with solenoid valve SV.Pass through the device control relay K M4 control loop of the disposable disconnection auxiliary reclay of rotary switch KA1, compressor electric motor during shutdown.The equipment that must control in the control circuit of wind cabinet comprises air-valve actuator, pressure fan, well heater, humidifier, transformer etc.The control loop of the pilot relay KA2 of air-valve actuator starts/stops form with crawl, and circuit such as self-locking, operation indication are set.The control loop of the device control relay K M5 of pressure fan starts/stops form with crawl equally; And circuit such as self-locking, overload protection, operation indication are set, receive the control of air pressure difference protector DPS, air-valve actuator pilot relay KA2 normally opened contact simultaneously.Under the closed situation of the device control relay K M5 of pressure fan; Select manually or automated manner is stirred SS; Start device control relay K M6, KM7 and the pilot lamp of wind heater counter and wind cabinet humidifier; The device control relay K M6 of its apoplexy heater counter is controlled by electrothermal relay FR6, stirs SS when stopping and getting final product, and Starting mode is controlled by the robotization control circuit automatically; But in this wind cabinet control circuit the robotization control circuit is not set, so automatic control switch is in normally off.Transformer TC normally is in the energising duty down at power supply always, and its effect is to cooperate control air returning valve actuator (1301), new air-valve actuator (1302) with air-valve actuator pilot relay KA2, and is shown in figure 13.
In Figure 15, freezer defrosting well heater (1505) main circuit that freezer cooling pump motor (1502) main circuit, air switch QF3, the control of device control relay K M3 normally opened contact, fuse F U3, freezer air-cooler motor (1503) main circuit of thermal protector FR3 protection, air switch QF4, the control of device control relay K M4 normally opened contact, fuse F U4, freezer compressor electric motor (1504) main circuit of thermal protector FR4 protection, air switch QF5, the control of device control relay K M5 normally opened contact, fuse F U5, the thermal protector FR5 that is protected by air switch QF1, the control of device control relay K M1 normally opened contact, fuse F U1, freezer blower fan of cooling tower motor (1501) main circuit of thermal protector FR1 protection, air switch QF2, the control of device control relay K M2 normally opened contact, fuse F U2, thermal protector FR2 protects constitutes the miniature cold storage main circuit.For improving the security of checking system; The miniature cold storage main circuit is not connected in the checking system, and circuit, air switch, fuse, freezer blower fan of cooling tower motor (1501), freezer cooling pump motor (1502), freezer air-cooler motor (1503), freezer compressor electric motor (1504), freezer defrosting well heater (1505) are not installed in the checking system among Figure 15.
In Figure 16; Transformer TC provides 24V power supply for this circuit; Give storehouse door well heater (1601), water inlet well heater (1602) power supply simultaneously, this circuit-line is not connected in the checking system, and storehouse door well heater (1601), water inlet well heater (1602) are not installed in the checking system.
In Figure 17, numeral is a wire size, the winding coil of box indicating components and parts.To be real standard module be provided with the miniature cold storage electric control circuit schematic diagram that uses to the real standard examination of student of specializing in that repeater contact switch, fault are provided with the repeater contact switch converting the control loop, the conversion that conceal disconnection under the miniature cold storage electric control system pattern into to Figure 17, and equipment that must control in the control circuit of miniature cold storage comprises freezer blower fan of cooling tower motor, freezer cooling pump motor, freezer air-cooler motor, freezer compressor electric motor, solenoid valve, freezer defrosting well heater, transformer etc.Wherein the device control relay K M1 of freezer blower fan of cooling tower motor, freezer cooling pump motor, the control loop of KM2 all start/stop form with crawl, and circuit such as self-locking, overload protection, operation indication are set.The control loop of the device control relay K M3 of freezer air-cooler motor starts/stops form with rotary switch; Overload protection, operation indication etc. are set; When being the device control relay K M5 startup of freezer defrosting well heater with rotary switch startup purpose; The device control relay K M3 of freezer air-cooler motor quits work, and the device control relay K M5 of freezer defrosting well heater is when quitting work, and the device control relay K M3 of freezer air-cooler motor can start automatically.The control loop of the device control relay K M4 of freezer compressor electric motor adopts indirect delayed startup method; The device control relay K M1 of freezer blower fan of cooling tower motor, freezer cooling pump motor, KM2 winding coil energising contact switch is closed with the rotary switch K2 closure of freezer air-cooler motor after and under the normally closed condition of water flow switch SL1 of cooling water system; Through rotary switch K1 relay K start-up time T; Delay time one to auxiliary reclay KA1 is closed; All be in normal and storehouse temperature temperature does not reach that design temperature temperature controller WJ is closed, defrosting timer RSJ is under the situation of refrigerating state at high voltage protective device SP, low-voltage variation device DP, oil pressure difference protector OP, high-temperature protector WT1, electrothermal relay FR4; The device control relay K M4 of freezer compressor electric motor starts, and compressor pilot lamp HG4 is bright simultaneously starts with solenoid valve SV.Pass through the device control relay K M4 loop of the disposable disconnection auxiliary reclay of rotary switch KA1, freezer compressor electric motor during shutdown.The control method of freezer defrosting well heater pilot relay KM5 is after auxiliary reclay KA1 closure; When defrosting timer RSJ is in defrosting state and electrothermal relay KM5 and is in normally closed; Start freezer defrosting well heater pilot relay KM5 and pilot lamp HG6, rotary switch K1 or switch to refrigerating state in the time of need stopping defrosting well heater pilot relay KM5 and work with defrosting timer RSJ.Transformer is in the energising duty after auxiliary reclay KA1 closure, its effect is power supply to storehouse door well heater and water inlet well heater to be provided, and is shown in figure 16.
The control method of the line broken circuit fault of the electric control system of central air conditioner and miniature cold storage combination.In the point 4,5 shown in figure 10, in the point 18,23, in the point 32,33, in the point 52,53, in the point 500,61, in the point 77,78, in the point 85,501, in the point 88,89, in the point 104,105, in the point 117,118, point all is that the line broken circuit fault is provided with a little in 126,127.Control loop line broken circuit with the cooling pump motor device pilot relay KM2 of central air conditioner is an example; Under the state that converts the central air conditioner electric control system into; Computing machine is to Mitsubishi PLC output order shown in Figure 7; Mitsubishi PLC digital output end Y4 exports " conducting " signal; Fault is provided with repeater 5KA coil electricity, and fault shown in figure 10 is provided with repeater 5KA normally closed contact and breaks off, and at this moment between the binding post of 18, No. 23 lines of connection, is detecting the line broken circuit fault with multimeter according to Figure 14 on the checking system; Get rid of the operation of control loop line broken circuit fault of cooling pump motor device pilot relay KM2 of central air conditioner to computing machine input after; Computing machine is to Mitsubishi PLC output order shown in Figure 7; Mitsubishi PLC digital output end Y4 exports " disconnection " signal; Fault is provided with repeater 5KA coil blackout; It is closed that fault shown in figure 10 is provided with repeater 5KA normally closed contact, at this moment the binding post of connection 18, No. 23 lines between detecting circuit connection with multimeter according to Figure 14 on the checking system, and fault is got rid of.
The control method of the protection components and parts of the electric control system of central air conditioner and miniature cold storage combination and refrigeration annex contact fault.All be that protection components and parts and refrigeration annex contact fault are provided with a little between the contact of electrothermal relay FR1 shown in figure 10, FR2, FR3, FR4, FR5, FR6, high voltage protective device SP, low-voltage variation device DP, oil pressure difference protector OP, temperature controller WJ, compressor high-temperature protector WT1, anti-freeze protector WT2, air pressure difference protector DPS, chilled water water flow switch SL1, chilled water water flow switch SL2.Air-cooler motor heat relay FR3 contact fault with miniature cold storage is an example; Under the state that converts the miniature cold storage electric control system into; Computing machine is to Mitsubishi PLC output order shown in Figure 7; Mitsubishi PLC digital output end Y7 exports " conducting " signal, and fault is provided with repeater 8KA coil electricity, and the fault that is connected in parallel on place, electrothermal relay FR3 contact shown in figure 10 is provided with repeater 8KA normally closed contact and breaks off; At this moment according to Figure 17 on the checking system with multimeter electrothermal relay FR3 contact 35, can detect electrothermal relay FR3 contact between the N6 line binding post and break off, simulated the contact fault of electrothermal relay FR3; Get rid of the operation of air-cooler motor heat relay FR3 contact fault of miniature cold storage to computing machine input after; Computing machine is to Mitsubishi PLC output order shown in Figure 7; Mitsubishi PLC digital output end Y7 exports " disconnection " signal; Fault is provided with repeater 8KA coil blackout; It is closed that the fault that is connected in parallel on place, electrothermal relay FR3 contact shown in figure 10 is provided with repeater 8KA normally closed contact, at this moment according to Figure 17 on the checking system with multimeter electrothermal relay FR3 contact 35, can detect electrothermal relay FR3 contacting, the fault eliminating between the N6 line binding post.
The control method of the components and parts winding coil fault of the electric control system of central air conditioner and miniature cold storage combination.Device control relay K M1 shown in figure 10; KM2; KM3; KM4; KA2; KM5; KM6; KM7; Auxiliary reclay KA1; Time relay KT; Solenoid valve SV; The point M1 that transformer TC secondary coil leading-out terminal connects; In 8; Point M2; In 20; Point M3; In 34; Point M7; In 79; Point M9; Among the N15; Point M10; In 106; Point M11; In 119; Point M12; Among the N21; Point M5; Among the N9; Point M4; Among the N8; Point M8; Among the N14; Point M6; All be that components and parts winding coil fault is provided with a little among the 24N.Blower fan of cooling tower motor device pilot relay KM1 winding coil fault with central air conditioner is an example; Under the state that converts the central air conditioner electric control system into; Computing machine is to Mitsubishi PLC output order shown in Figure 7; COM1 group digital output end Y0 output " conducting " signal of Mitsubishi PLC expansion module shown in Figure 8; Fault is provided with repeater 25KA coil electricity, and fault shown in figure 10 is provided with repeater 25KA normally closed contact and breaks off, and same fault shown in figure 11 is provided with repeater 25KA coil electricity; The fault that connects M1, No. 8 lines is provided with repeater 25KA normally closed contact and breaks off; At this moment detect between 7, No. 8 line binding posts of the KM1 of checking system winding coil binding post according to Figure 14, be equivalent between the binding post (1102) after binding post shown in figure 11 (1101), the repacking, detect, can detect KM1 winding coil open failure; Get rid of the operation of blower fan of cooling tower motor device pilot relay KM1 winding coil fault of central air conditioner to computing machine input after; Computing machine is to Mitsubishi PLC output order shown in Figure 7; COM1 group digital output end Y0 output " disconnection " signal of Mitsubishi PLC expansion module shown in Figure 8, fault is provided with repeater 25KA coil blackout, and fault shown in figure 10 is provided with repeater 25KA normally closed contact and connects; Same fault shown in figure 11 is provided with repeater 25KA coil blackout; The fault that connects M1, No. 8 lines is provided with repeater 25KA normally closed contact closure, at this moment detects between 7, No. 8 line binding posts of the KM1 of checking system winding coil binding post according to Figure 14, is equivalent between the binding post (1102) after binding post shown in figure 11 (1101), the repacking, detect; It is normal to detect the KM1 winding coil, and fault is got rid of.
The control method of the equipment overprotection fault of central air conditioner and miniature cold storage electric control system.Described equipment overprotection fault comprises the equipment motor overload, the water system filtrator crosses dirty or lack of water, fault such as the compressor high-pressure is too high, low pressure is low excessively, compressor oil pressure reduction is low excessively, the compressor electric motor temperature is too high, the chilled water water temperature is low excessively, wind cabinet air pressure difference is excessive.With the too high fault of miniature cold storage compressor high-pressure is example; Under the state that converts the miniature cold storage electric control system into, according to Figure 17, when on the control loop of the device control relay K M4 of freezer compressor electric motor, meeting the condition of startup; The energising of device control relay K M4 winding coil; Device control relay K M4 normally opened contact as shown in Figure 7 is closed, and to the feedback signal of Mitsubishi PLC input end X3 input one " closure ", Mitsubishi PLC is transmitted data to computing machine; Computing machine is according to this feedback signal; In conjunction with the situation that is provided with the too high fault of miniature cold storage compressor high-pressure, after time-delay, embody the fault instruction to Mitsubishi PLC output shown in Figure 7, Mitsubishi PLC digital output end Y14 exports " conducting " signal; Fault is provided with repeater 13KA coil electricity; The fault that is connected in parallel on place, high voltage protective device SP contact shown in figure 10 is provided with repeater 13KA normally closed contact and breaks off, and device control relay K M4 control loop breaks off, the outage of KM4 winding coil; At this moment break off between 66, No. 67 line binding posts of high voltage protective device SP contact, can detecting high voltage protective device SP contact with multimeter on the checking system according to Figure 17, simulated the too high fault of miniature cold storage compressor high-pressure; As shown in Figure 9; Built-in switch (9002) closure when pressing SR (9001); Import the reset signal of " closure " to the input end X16 of Mitsubishi PLC shown in Figure 7; Mitsubishi PLC and computer data exchange, computing machine is exported the high voltage protective device SP contact instruction that resets to Mitsubishi PLC after computing, and Mitsubishi PLC digital output end Y14 exports " disconnection " signal; Fault is provided with repeater 13KA coil blackout; It is closed that the fault that is connected in parallel on place, high voltage protective device SP contact shown in figure 10 is provided with repeater 13KA normally closed contact, at this moment between 66, No. 67 line binding posts of high voltage protective device SP contact, can detect high voltage protective device SP contacting with multimeter according to Figure 17 on the checking system, and high voltage protective device SP contact resets; After the operation of the too high fault of miniature cold storage compressor high-pressure was got rid of in the computing machine input, the control loop of closing apparatus pilot relay KM4 can make energising of KM4 winding coil and normal operation again.The high voltage protective device SP contact if only resetted and do not get rid of the too high fault of miniature cold storage compressor high-pressure, behind the control loop of closing apparatus pilot relay KM4, computing machine output control repeats to simulate the too high fault of miniature cold storage compressor high-pressure again; The high voltage protective device SP contact that do not reset if only got rid of the too high fault of miniature cold storage compressor high-pressure, the control loop of device control relay K M4 can't be closed, and the KM4 winding coil can't be switched on, and has simulated the real work situation of equipment.
The operating process of this checking system is following:
1, teacher or examination person hold input student information, examination paper information examination software teacher, and data are kept at SQL database;
2, the student holds login examination software student, gets into checking system, reads the SQL database problem data simultaneously automatically;
3, change central air conditioner or miniature cold storage electric control system in student's end-grain cutting, and check whether the circuit indicator of practical traning platform is corresponding;
4, tentatively start electric control circuit in the practical traning platform, check phenomenon of the failure, confirm fault coverage;
5, circuit theory diagrams special-purpose according to the student cut off the power supply on electric control circuit or switch on detection with multimeter;
6, after the localization of faults, hit corresponding fault title at student's end points, correct judgment is promptly fixed a breakdown;
7, restart electric control circuit, check troubleshooting scenario, promptly repeated for 5,6 steps if also have fault to exist;
8, the test time to or click the button of handing in an examination paper when handing in an examination paper in advance and withdraw from, send to SQL database on the paper data simultaneously;
9, teacher or examination person derive the school report after changing volume automatically at teacher's end with the Excel form, preserve or print.
Claims (6)
1. the intelligent fault checking system of central air conditioner and miniature cold storage; Comprise computing machine, switch, programmable controller PLC; Pass through Ethernet and switch communication between the computing machine; Programmable controller PLC and computing machine carry out exchanges data; It is characterized in that: also comprise real standard module, system's modular converter, signal feedback module, fault generation module; Described system modular converter comprises conversion repeater and control circuit and PLC digital output end is set, and described signal feedback module comprises device control relay signal feedback contact switch, protection components and parts and refrigeration annex reset switch and feedback line and PLC digital input end, and described fault generation module comprises fault repeater and control circuit and PLC digital output end are set.
2. checking system according to claim 1 is characterized in that: the electric control system that described real standard module comprises central air conditioner and miniature cold storage combination be arranged at each fault in this control system and a little fault is set the repeater contact switch is set and is used for the conversion that different control circuits change the repeater contact switch is set.
3. checking system according to claim 2; It is characterized in that: described fault is provided with the setting of repeater contact switch in the electric control system of central air conditioner and miniature cold storage combination, comprises that the contact that fault with the analog line open circuit fault is provided with repeater is connected on the control loop; Comprise that the fault that will simulate protection components and parts and refrigeration annex contact fault and overprotection fault is provided with the contact of repeater and is connected in protection components and parts, refrigeration annex contact leads place; The contact that the fault that comprises analog component winding coil fault is provided with repeater is connected on from components and parts winding coil leading-out terminal lead-in wire passes the binding post insulation course on the circuit at the practical traning platform back side.
4. checking system according to claim 3 is characterized in that: described protection components and parts comprise electrothermal relay FR1, FR2, FR3, FR4, FR5, FR6, high voltage protective device SP, low-voltage variation device DP, oil pressure difference protector OP, temperature controller WJ, compressor high-temperature protector WT1, anti-freeze protector WT2, air pressure difference protector DPS, chilled water water flow switch SL1, chilled water water flow switch SL2 with the refrigeration annex.
5. checking system according to claim 3 is characterized in that: described components and parts winding coil comprises device control relay K M1, KM2, KM3, KM4, KA2, KM5, KM6, KM7, auxiliary reclay KA1, time relay KT, solenoid valve SV, transformer TC secondary winding coil.
6. checking system according to claim 1 is characterized in that: described protection components and parts and refrigeration annex reset switch comprise the built-in reset switch of electrothermal relay FR1, FR2, FR3, FR4, FR5, FR6, high voltage protective device SP, oil pressure difference protector OP.
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| CN2011202138554U CN202275532U (en) | 2011-06-22 | 2011-06-22 | Intelligent fault examining system for central air conditioner and miniature cold storage warehouse |
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| CN2011202138554U CN202275532U (en) | 2011-06-22 | 2011-06-22 | Intelligent fault examining system for central air conditioner and miniature cold storage warehouse |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103437988A (en) * | 2013-08-29 | 2013-12-11 | 广西三威林产工业有限公司 | Air compressor control system |
| CN104933921A (en) * | 2015-06-26 | 2015-09-23 | 浙江亚龙教育装备股份有限公司 | Answering system, and client and client system used for answering |
| CN105489081A (en) * | 2016-01-26 | 2016-04-13 | 江苏海事职业技术学院 | Practical training system for maintenance of ship power station |
| CN107886790A (en) * | 2017-11-09 | 2018-04-06 | 深圳法宝技术有限公司 | A kind of jewelry intelligent comprehensive detects experience system |
| CN109448495A (en) * | 2018-12-29 | 2019-03-08 | 武汉思源久行科技有限公司 | A kind of Practical training equipment exigency stop system |
| CN109448496A (en) * | 2018-12-29 | 2019-03-08 | 武汉思源久行科技有限公司 | A kind of training examination system |
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2011
- 2011-06-22 CN CN2011202138554U patent/CN202275532U/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103437988A (en) * | 2013-08-29 | 2013-12-11 | 广西三威林产工业有限公司 | Air compressor control system |
| CN103437988B (en) * | 2013-08-29 | 2016-01-06 | 广西三威林产工业有限公司 | Air compressor control system |
| CN104933921A (en) * | 2015-06-26 | 2015-09-23 | 浙江亚龙教育装备股份有限公司 | Answering system, and client and client system used for answering |
| CN105489081A (en) * | 2016-01-26 | 2016-04-13 | 江苏海事职业技术学院 | Practical training system for maintenance of ship power station |
| CN107886790A (en) * | 2017-11-09 | 2018-04-06 | 深圳法宝技术有限公司 | A kind of jewelry intelligent comprehensive detects experience system |
| CN109448495A (en) * | 2018-12-29 | 2019-03-08 | 武汉思源久行科技有限公司 | A kind of Practical training equipment exigency stop system |
| CN109448496A (en) * | 2018-12-29 | 2019-03-08 | 武汉思源久行科技有限公司 | A kind of training examination system |
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