CN101986371B - Computer-aided overhaul simulation system for large and medium refrigeration and air-conditioning engineering - Google Patents

Abstract

The invention discloses a computer-aided overhaul simulation system for large and medium refrigeration and air-conditioning engineering, which comprises a computer, an I/O input/output module, an electronic switch driving module and an electric control circuit fault simulation module of a large and medium refrigeration and air-conditioning system, wherein the fault simulation module comprises the electric control circuit of the large and medium refrigeration and air-conditioning system and a fault electronic switch arranged in each arranging point of the control circuit; and the computer sequentially drives each fault electronic switch to be turned on and turned off through the I/O input/output module and the electronic switch driving module. In the invention, each fault electronic switch is controlled to be turned on and turned off by compiling software for the computer, fault setting and removal of the electric control circuit of the large and medium refrigeration and air-conditioning system are realized, and the electric control circuit of the large and medium refrigeration and air-conditioning system in the fault simulation module is the same as or similar to a real circuit. Training and examination contents are determined by the computer software, the examination results are automatically assessed by the computer, information management of the setting and removal of the faults is carried out by the computer, and the examination is just, fair and efficient.

Description

The area of computer aided maintenance analogue system of big-and-middle-sized Refrigeration and Air-conditioning Engineering

Technical field:

The present invention relates to the refrigeration and air-conditioning technical field; Be specifically related to the area of computer aided maintenance analogue system of big-and-middle-sized Refrigeration and Air-conditioning Engineering; This system is mainly used in big-and-middle-sized refrigeration plant and central air conditioner system practical operation, maintenance, repair and operational management training; Need before the student training to grasp certain Refrigeration & Air-Conditioning knowwhy, training objective is senior worker, technician and senior technician.

Background technology:

Refrigeration air-conditioner is widely used in industry and commerce and daily life, and society presses for line technology personnel of refrigerated air-conditioning system maintenance and management experience.There is clearly regulation in labour and personnel management mechanism to refrigeration air-conditioner skills training, examination, and key is how to train and take the means of which kind of examination to examine.Though at present domestic refrigerator and air-conditioning maintenance are carried out better; But big-and-middle-sized refrigeration plant and central air conditioner system society owning amount huge (factory, office building, market, public building etc.); Market presses for the professional with big-and-middle-sized refrigeration and central air conditioner system practical experience; Actual conditions are that training facilities seriously lags behind at present, and the real standard of this part generally only limits to visit.Big-and-middle-sized refrigeration plant and central air conditioner system are often managed by electric personnel, because system equipment is worth height, energy consumption is big, there is the phenomenon that system operation cost is high, deal with problems and cure the symptoms, not the disease in electric personal management refrigeration plant.Industrial refrigeration equipment and central air conditioner comprehensive training system relate to that product category is many, equipment investment is big, are difficult if require the training unit to have complete equipment and have certain platform tricks.Have again;, practical operation have device safety problem, the cold-producing medium of high pressure often to fill and discharge and leak when training to environmental disruption or the like problem, therefore, and in the technical ability operation training at present; Because of factors such as object operation condition restriction, all be more with system's electrical equipment principle training.Traditional refrigeration air-conditioner checking system generally occurs with the form of circuit board or electric cabinet; The set-up mode of fault is provided with fault with the method for manual work implicit (will examine circuit to break off by hand) or operating troubles switch (breakdown switch is connected on the examination circuit); During examination, the examinee carries out testing and diagnosing with instrument to circuit in official hour, finds out the trouble spot; Fix a breakdown by hand, can operate as normal until entire circuit.21 century, the intersection infiltration of industry makes refrigerated air-conditioning system control more and more accurate reliable, and the content that refrigerated air-conditioning system is forgiven is more and more abundanter, and mechanical, electric, information integral develops rapidly.With the intelligent air conditioner system is building automatic (BAS) the system utilization in the building in modern times on a large scale of administration of energy conservation core, and it is energy-saving benefit and the management benefit that enterprise brings that modernized factory payes attention to the intelligent air conditioner system.Teaching as refrigeration air-conditioner also must grow with each passing hour, and the modernized intelligent air conditioner of introducing system has become the task of top priority of refrigeration air-conditioner specialty in teaching and operation training.How fault to be set, to get rid of the new problem that becomes the refrigeration air-conditioner professional teaching by students ' analysis through the auxiliary analogue simulation of computer system.

Summary of the invention:

The maximum problem of system operational management is appeared at searching and get rid of fault; The object of the invention is exactly the deficiency that adopts circuit board concealed wiring to fix a breakdown when existing refrigeration air-conditioner technical ability is examined practical operation in order to overcome; A kind of area of computer aided maintenance analogue system of big-and-middle-sized Refrigeration and Air-conditioning Engineering is proposed; Need not in the examination circuit, to be provided with by hand and to fix a breakdown, be convenient to examination the fault simulation and the fault solution process of big-and-middle-sized refrigerated air-conditioning system.

For realizing above-mentioned purpose; The area of computer aided maintenance analogue system of the big-and-middle-sized Refrigeration and Air-conditioning Engineering of the present invention; Comprise computing machine, I/O input/output module, electronic switch driver module and big-and-middle-sized refrigerated air-conditioning system electric control circuit fault simulation module; Said fault simulation module comprises big-and-middle-sized refrigerated air-conditioning system electric control circuit and is located at each fault of this control circuit fault electronic switch a little is set, and computing machine is successively through the break-make of I/O input/output module, each fault electronic switch of electronic switch driver module driving.

Above-mentioned big-and-middle-sized refrigerated air-conditioning system electric control circuit can be provided with polytype, and said fault simulation module also comprises wherein one type system type selection circuit of selection, and said electronic switch driver module drive system type selecting circuit is selected.

In one embodiment; Said system type selecting circuit comprises a plurality of type selecting electronic switches; These a plurality of type selecting electronic switches are connected on the power supply loop of the refrigeration part electric control circuit in the corresponding big-and-middle-sized refrigerated air-conditioning system respectively, and said electronic switch driver module drives the break-make of type selecting electronic switch.Through driving the break-make of a plurality of type selecting electronic switches, in polytype big-and-middle-sized refrigerated air-conditioning system electric control circuit, each refrigeration part electric control circuit in one type the big-and-middle-sized refrigerated air-conditioning system is wherein connected.

In another embodiment; Said system type selecting circuit comprises a plurality of type selecting electronic switches and corresponding a plurality of banked relay; After each type selecting electronic switch and the series connection of corresponding banked relay; Be connected in parallel on the power supply two ends, the switch contact of banked relay is connected on the power supply loop of the refrigeration part electric control circuit in the corresponding big-and-middle-sized refrigerated air-conditioning system, and said electronic switch driver module drives the break-make of type selecting electronic switch.Through driving the break-make of a plurality of type selecting electronic switches; Then control corresponding a plurality of banked relay energising or outage; Also just control the switch contact break-make of a plurality of banked relays; Thereby in polytype big-and-middle-sized refrigerated air-conditioning system electric control circuit, one type the refrigeration part electric control circuit of big-and-middle-sized refrigerated air-conditioning system is wherein connected.

Above-mentionedly be located at big-and-middle-sized each fault of refrigerated air-conditioning system electric control circuit the fault electronic switch that a little fault electronic switch can comprise analog line break-make fault is set, this fault electronic switch is connected the circuit on-off fault two ends a little is set; Can comprise the fault electronic switch of simulation thermal relay normally closed contact fault, this fault electronic switch is connected the thermal relay normally closed contact fault two ends a little is set; The fault electronic switch that maybe can comprise simulation refrigeration annex fault.

Above-mentioned electronic switch driver module can comprise relay drive circuit, magnetic-holding electric magnet driving circuit, controllable silicon drive circuit or optocoupler driving circuit, and above-mentioned fault electronic switch can be the contact switch of relay, contact switch, controllable silicon or the optocoupler output terminal of magnetic-holding electric magnet.The above-mentioned type selects electronic switch to can be the contact switch of relay, contact switch, controllable silicon or the optocoupler output terminal of magnetic-holding electric magnet.

The present invention is through being computer compilation software, and computing machine is realized fault setting and eliminating to big-and-middle-sized refrigerated air-conditioning system electric control circuit through the break-make of I/O input/output module, each fault electronic switch of electronic switch driver module driving.Select circuit through system type; Realization is to the combination of all kinds of big-and-middle-sized refrigerated air-conditioning system electric control circuits, and big-and-middle-sized refrigerated air-conditioning system electric control circuit and real big-and-middle-sized refrigerated air-conditioning system electric control circuit in the big-and-middle-sized refrigerated air-conditioning system electric control circuit fault simulation module are same or similar.The training and examination content is determined that by computer software the result of appraisal are evaluated by computer software automatically, and the setting of fault is carried out information management with eliminating by computing machine, examines just, fair, efficient.

Description of drawings:

Fig. 1 is the overall topological structure block diagram of practical application of the present invention;

Fig. 2 is that system unit connects block diagram;

Fig. 3 is Fig. 1 malfunction counter front view (FV);

Fig. 4 is malfunction counter wiring topology figure;

Fig. 5 is the refrigerated air-conditioning system electrical schematic diagram of electric control circuit control in the malfunction counter;

Fig. 6 A is the refrigerated air-conditioning system electric control circuit fault simulation modular circuit schematic diagram in the malfunction counter;

Fig. 6 B is the continuous figure of Fig. 6 A;

Fig. 6 C is the continuous figure of Fig. 6 B;

Fig. 6 D is the block diagram that Fig. 6 B and Fig. 6 C merge;

Fig. 7 A is that the fault of temperature controller WJ is provided with circuit diagram;

Fig. 7 B is the special-purpose temperature controller WJ circuit diagram of student;

Fig. 8 A is that cooling water flow switch S L1 fault is provided with circuit diagram;

Fig. 8 B is the special-purpose cooling water flow switch S L1 circuit diagram of student;

Fig. 9 A is that high voltage protective switch DP fault is provided with circuit diagram;

Fig. 9 B is that high-low pressure protection switch DP/SP fault is provided with the auxiliary circuit schematic diagram;

Fig. 9 C is the special-purpose high voltage protective switch DP circuit diagram of student;

Figure 10 is that oil pressure protection switch OP fault is provided with the auxiliary circuit schematic diagram;

Figure 11 is the special-purpose air-cooled freezer system works flow process figure of student;

Figure 12 is the special-purpose air-cooled freezer system electrical schematic diagram of student;

Figure 13 is the special-purpose air-cooled freezer system electrical control circuit schematic diagram of student;

Figure 14 is the special-purpose water chilling unit system system works of student flow process figure;

Figure 15 is the special-purpose water chilling unit system electrical schematic diagram of student;

Figure 16 is the special-purpose water chilling unit system electric control circuit of a student schematic diagram;

Figure 17 is the special-purpose constant temperature and humidity system workflow diagram of student;

Figure 18 is the special-purpose constant temperature and humidity system electrical schematic diagram of student;

Figure 19 is the special-purpose constant temperature and humidity system electric control circuit of a student schematic diagram;

Embodiment:

Below in conjunction with accompanying drawing application implementation example of the present invention is described in detail.

Embodiment one

Practical application system of the present invention basic comprising is that server, workstation, I/O input-output card, terminal strip and intelligent fault are provided with real standard cabinet; Comprise big-and-middle-sized refrigerated air-conditioning system electric control circuit fault simulation module in the malfunction counter; This fault simulation module comprises the big-and-middle-sized refrigerated air-conditioning system electric control circuit of three types of handpiece Water Chilling Units, constant temperature and humidity, air-cooled freezer and is located at each fault of this control circuit fault electronic switch a little is set; The overall topological structure block diagram is seen Fig. 1; Parts connect block diagram and see Fig. 2, and control signal partly inserts for 220V, and its contactor and relay are controlled switching on and off of 380V part.Realize combination, fault setting and eliminating through computer software, the refrigeration annex is realized like fault setting and eliminatings such as water flow switch, pressure-head switch and temperature protection switch through the fault electronic switch all kinds of refrigerated air-conditioning system electric wirings.The training and examination content imports to workstation automatically by computer server, and result of appraisal computer server is evaluated automatically.

System server comprises SQL database and examination Training Management software; Software can import and administrative standard examination training exam pool (excel form); Can manage examinee information and login password; Test time and each examination point mark can be set, can also gather the information of each workstation examination process automatically through network.Server has system management, Surveillance center, examinee's management, exam pool management four big functions.

Workstation comprises a cover computer system, and this system is used to move the client software of training checking system.Client software comprises refrigeration air-conditioner analog simulation software; Software comprises handpiece Water Chilling Units, constant temperature and humidity, air-cooled freezer system and electric control system; The I/O input-output card comprises the I/O input/output module; Workstation computer is through I/O input-output card output control signal; Terminal strip comprises the electronic switch driver module, and Computer I/O input-output card can be realized hardware operation and feedback of status to each electronic switch in the big-and-middle-sized refrigerated air-conditioning system electric control circuit fault simulation module in the malfunction counter through terminal strip.

Big-and-middle-sized refrigerated air-conditioning system electric control circuit is provided with three types of handpiece Water Chilling Units, constant temperature and humidity, air-cooled freezer electric control circuit in the malfunction counter; Like Fig. 3; 4, comprise all electric original papers of these three kinds of representative refrigerated air-conditioning system modules in the malfunction counter and do not comprise compressor, evaporator; All refrigeration annexes of condenser and pipeline, wherein Fig. 3 representes the pilot lamp of each module and the knob that some can manually be provided with.Realize each system line independent assortment by computing machine through I/O input-output card, terminal strip; The trouble spot is managed by server automatically; Student examination is through corresponding system lines of inspection such as essential tool such as multimeters; The information that inspection is out of order is a little imported computing machine, and from dynamic response, the inspection failure message is write down as the score basis of taking an examination by server computing machine simultaneously automatically through the I/O input-output card.

Big-and-middle-sized refrigerated air-conditioning system electrical schematic diagram by electric control circuit control in the malfunction counter is seen Fig. 5, and big-and-middle-sized refrigerated air-conditioning system electric control circuit fault simulation modular circuit schematic diagram is seen Fig. 6 in the malfunction counter, and table 1 seen in capitalization among the figure and Chinese noun.

Table 1

As shown in Figure 5, the about 160KW of system's total installation of generating capacity, the electric power input requires: 380V, 5 lines, 50HZ.The cooling tower PM1 of handpiece Water Chilling Units, cooling pump PM2; The refrigerating water pump PM3 of handpiece Water Chilling Units or the pressure fan PM3 of constant temperature and humidity; The evaporation fan PM4 of air-cooled freezer; The condensation fan PM1-1 of air-cooled freezer or constant temperature and humidity, the compressor CM of handpiece Water Chilling Units or air-cooled freezer or constant temperature and humidity insert the 380V alternating current through leakage switch QF, fuse FU, contactor KM, electrothermal relay FR respectively successively.The well heater TM1 of constant temperature and humidity, humidifier TM2 insert 380V through leakage switch, fuse, contactor respectively.The defrosting well heater WM1 of air-cooled freezer, Ku Men. water inlet well heater WM2 then inserts 220V.

Shown in Fig. 6 A, the circuit in the malfunction counter is that 220V inserts.Illuminating lamp W in the travel switch QP control fault cabinet when the malfunction counter door is opened, lights cabinet top illuminating lamp.Switching Power Supply SP1 converts the 220V alternating current into the 12V direct current, feeding terminal plate PCLD1, PCLD2.

Big-and-middle-sized refrigerated air-conditioning system electric control circuit fault simulation module comprises big-and-middle-sized refrigerated air-conditioning system electric control circuit, is located at fault electronic switch and the system type that each fault of this control circuit is provided with a little and selects circuit in the malfunction counter; Big-and-middle-sized refrigerated air-conditioning system electric control circuit is provided with three types of handpiece Water Chilling Units electric control circuits, constant temperature and humidity electric control circuit, air-cooled freezer electric control circuit; Shown in Fig. 6 D; Refrigeration part electric control circuit in these three types comprises cooling tower PM1, the cooling pump PM2 starting or stopping control circuit of handpiece Water Chilling Units; The pressure fan PM3 starting or stopping control circuit of the refrigerating water pump PM3 of handpiece Water Chilling Units or constant temperature and humidity; The evaporation fan PM4 start and stop and the running control circuit of air-cooled freezer; The condensation fan PM1-1 running control circuit of air-cooled freezer or constant temperature and humidity; The well heater TM1 of constant temperature and humidity, humidifier TM2 running control circuit, the defrosting well heater WM1 of air-cooled freezer, Ku Men. the compressor CM start and stop and the running control circuit of water inlet well heater WM2 running control circuit and handpiece Water Chilling Units, air-cooled freezer or constant temperature and humidity.

Shown in Fig. 6 A; System type selects circuit to comprise handpiece Water Chilling Units, constant temperature and humidity, three type selecting electronic switches of air-cooled freezer PCLD2-21NO, PCLD2-22NO, PCLD2-23NO and corresponding handpiece Water Chilling Units, constant temperature and humidity, three banked relay KA1 of air-cooled freezer, KA2, KA3; After handpiece Water Chilling Units type selecting electronic switch PCLD2-21NO and handpiece Water Chilling Units banked relay KA1, constant temperature and humidity type selecting electronic switch PCLD2-22NO and constant temperature and humidity banked relay KA2, air-cooled freezer type selecting electronic switch PCLD2-23NO and air-cooled freezer banked relay KA3 connect respectively; Be connected in parallel on power supply two ends 1/N; Electronic switch driver module in the terminal strip PCLD2 drives the break-make of handpiece Water Chilling Units, constant temperature and humidity, three type selecting electronic switches of air-cooled freezer PCLD2-21NO, PCLD2-22NO, PCLD2-23NO respectively; The normally opened contact of handpiece Water Chilling Units banked relay KA1 is connected on refrigeration part cooling tower PM1, the cooling pump PM2 of handpiece Water Chilling Units, the power supply loop of compressor CM starting or stopping control circuit, and normally closed contact is connected on the power supply loop of the refrigeration part condensation fan PM1-1 running control circuit of air-cooled freezer or constant temperature and humidity; The normally opened contact of constant temperature and humidity banked relay KA2 is connected on refrigeration part well heater TM1, the humidifier TM2 running control circuit of constant temperature and humidity, the power supply loop of compressor CM starting or stopping control circuit; The normally opened contact of air-cooled freezer banked relay KA3 is connected on refrigeration part evaporation fan PM4 starting or stopping control circuit, compressor CM start and stop and running control circuit, defrosting well heater WM1, the Ku Men of air-cooled freezer. and the power supply loop of water inlet well heater WM2 running control circuit, normally closed contact are connected on the power supply loop of refrigeration part compressor CM running control circuit of refrigeration part pressure fan PM3 starting or stopping control circuit, handpiece Water Chilling Units or constant temperature and humidity of refrigeration part refrigerating water pump PM3 or the constant temperature and humidity of handpiece Water Chilling Units.Through driving the break-make of three type selecting electronic switch PCLD2-21NO, PCLD2-22NO, PCLD2-23NO; Then control corresponding three banked relay KA1, KA2, KA3 energising or outage; Also just control the switch contact break-make of three banked relay KA1, KA2, KA3; Thereby in three types of refrigerated air-conditioning system electric control circuits, the refrigeration part electric control circuit in one type of refrigerated air-conditioning system is wherein connected.

During the fault examination; Water chilling unit system, constant temperature and humidity system and air-cooled freezer system independently examine respectively for three types; When handpiece Water Chilling Units type selecting electronic switch PCLD2-21NO connects; Expression is examined handpiece Water Chilling Units, handpiece Water Chilling Units banked relay KA1 energising, and Fig. 6 B and Fig. 6 C are equivalent to Figure 16; When constant temperature and humidity type selecting electronic switch PCLD2-22NO connects, represent constant temperature and humidity system is examined, constant temperature and humidity banked relay KA2 energising, Fig. 6 B and Fig. 6 C are equivalent to Figure 19; When air-cooled freezer type selecting electronic switch PLCD-23NO connects, expression is examined air-cooled freezer banked relay KA3 energising, Fig. 6 B and the equivalent Figure 13 of Fig. 6 C to air-cooled freezer system; Workstation computer drives the break-make of type selecting electronic switch PCLD2-21NO, PCLD2-22NO, PLCD2-23NO through I/O input-output card, terminal strip.

Said system type selecting circuit comprises three type selecting electronic switches and corresponding three banked relays; System type selects circuit also can only comprise five type selecting electronic switches, replaces the normally opened contact, normally closed contact, the normally opened contact of relay K A2, normally opened contact and the normally closed contact of relay K A3 of relay K A1 respectively.Workstation computer is through the break-make of I/O input-output card, these five type selecting electronic switches of terminal strip driving, to select wherein one type of refrigerated air-conditioning system electric control circuit.Action effect is the same.

Shown in Fig. 6 B, 6C; Be handpiece Water Chilling Units, constant temperature and humidity, three types of refrigerated air-conditioning system electrical controls of air-cooled freezer and operation conditions indicating circuit; And be located at each fault of this electric control circuit fault electronic switch NC a little is set; All fault electronic switch NC comprise the fault electronic switch of analog line break-make fault, and this fault electronic switch is connected the circuit on-off fault two ends a little are set, like fault electronic switch 1-3NC, 1-5NC etc.; Comprise simulation electrothermal relay FR0, FR1, FR2, FR3, the fault electronic switch 2-4NC of FR4 normally closed contact fault, 1-4NC, 1-1NC, 1-7NC, 1-10NC, fault electronic switch 2-4NC, 1-4NC, 1-1NC, 1-7NC, 1-10NC are connected to electrothermal relay FR0, FR1, FR2, FR3, FR4 normally closed contact fault two ends a little are set; With the fault electronic switch that comprises simulation refrigeration annex fault.The refrigeration annex comprises anti-frost protection switch WT2, high temperature protection switch WT1, temperature controller WJ, chilled water flow switch S L2, cooling water flow switch S L1, low-voltage protective switch SP, high voltage protective switch DP and oil pressure protection switch OP.

The fault electronic switch of simulation refrigeration annex fault comprises fault electronic switch 1-18NC, 1-17NC, the 2-1NC of simulation anti-frost protection switch WT2, high temperature protection switch WT1 and temperature controller WJ fault; Fault electronic switch 1-18NC, 1-17NC, 2-1NC are connected to anti-frost protection switch WT2, high temperature protection switch WT1 and temperature controller WJ fault two ends a little are set, virtual connection anti-frost protection switch WT2, high temperature protection switch WT1 and temperature controller WJ on it.With simulation temperature controller WJ fault is example, shows that system need not dismantle components and parts and also the components and parts fault can be set, in Fig. 7 A circuit, for temperature controller WJ parallel connection a fault electronic switch 2-1NC, and temperature controller WJ is that virtual connection is in circuit.When temperature controller WJ fault was not set, fault electronic switch 2-1NC connected, detect 56 with 57 be channel status, represent that temperature controller WJ is normal.When temperature controller WJ fault was set, fault electronic switch 2-1NC broke off because temperature controller WJ virtual connection, detect 56 with 57 be off state, represent that temperature controller WJ has fault.Concealed this circuit of fault electronic switch 2-1NC in the used drawing of student, shown in Fig. 7 B.

The fault electronic switch of simulation refrigeration annex fault comprises fault electronic switch 1-15NC, the 1-16NC of simulation chilled water flow switch S L2, cooling water flow switch S L1 fault; Fault electronic switch 1-15NC, 1-16NC are connected chilled water flow switch S L2 after connecting mutually with the normally opened contact of refrigerating water pump PM3 contactor KM3, cooling pump PM2 contactor KM2 respectively, cooling water flow switch S L1 fault is provided with two ends a little, virtual connection chilled water flow switch S L2, cooling water flow switch S L1 on it.With cooling water flow switch S L1 work is example, shows how system simulates the actual working state of refrigeration part.Among Fig. 8 A, SL1 is the cooling water flow switch, virtual connection in circuit, and KM2 is the master relay of cooling pump PM2.Under off-position, measure, whether no matter the lack of water fault be set, all be in off-state between 44 and 45; This some simulation cooling pump PM2 does not open, and does not have the current process, the operation electric-control system of at this moment must switching on; When contactor KM2 is closed, when cooling-water pump PM2 starts, be off-state if fault electronic switch 1-16NC is provided with fault; Measure between 44 and 45 voltage can to detect SL1 be off-state this moment, can judge the lack of water fault.Because the lack of water fault must just can detect in energising, can only detect this and met in practice with the survey voltage method.The used drawing of student conceals partial circuit, shown in Fig. 8 B.

The fault electronic switch of simulation refrigeration annex fault comprises fault electronic switch 1-23NC, the 2-12NC of simulation low-voltage protective switch SP, high voltage protective switch DP fault; Fault electronic switch 1-23NC, 2-12NC are connected to low-voltage protective switch SP, high voltage protective switch DP fault is provided with two ends a little; And it is parallelly connected mutually with protection auxiliary relay KA6 normally closed contact; Virtual connection low-voltage protective switch SP, high voltage protective switch DP on it; Be provided with high-low pressure protection switch DP/SP fault auxiliary circuit is set; Shown in Fig. 9 B; This auxiliary circuit comprises start and stop auxiliary relay KA7, protection auxiliary relay KA6, reset switch TP, and start and stop auxiliary relay KA7 is connected between compressor start and stop rotary switch K1 and the power supply one end N, successively after the normally opened contact series connection with normally opened contact, reset switch TP, protection auxiliary relay KA6 and the compressor triangle start contactor KM Δ of start and stop auxiliary relay KA7; Be connected the two ends 1/N of power supply, the normally opened contact of the normally opened contact two ends parallel connection protection auxiliary relay KA6 of compressor triangle start contactor KM Δ.With compressor CM high voltage fault is example, shown in Fig. 9 A, and high voltage protective switch DP virtual connection in circuit.Fig. 9 B rotary switch K1 starts delay switch for compressor CM, and the KM Δ is a compressor CM master control contactor, and KA6, KA7 are auxiliary relay, and reset switch TP is that high voltage protective switch DP goes up the SR after repacking.Under the situation of outage, whether no matter the too high fault of high pressure be set, all be in channel status between measuring at 309 and 55; This analog compression machine CM does not start, and the too high fault of high pressure can not occur, start operation electric-control system; When manual rotary switch K1 was closed, compressor CM got into the delayed startup state, and start and stop auxiliary relay KA7 is closed; Delay time one arrives, and compressor master relay KM Δ is closed, protects auxiliary relay KA6 coil electricity this moment; The normally closed contact of the protection auxiliary relay KA6 of Fig. 9 A breaks off, and the normally opened contact of the protection auxiliary relay KA6 of Fig. 9 B is closed, if be provided with fault at fault electronic switch 2-12NC; Be off-state between 309 and 55, at this moment fault occurs, and the KM Δ breaks off; The KA6 coil but keeps the energising duty owing to self-locking, and the KA6 contact of Fig. 9 A is still broken off, and the too high fault of high pressure just occurs after this analog compression machine operation; Must just can reset by SR, measure between 309 and 55 voltage can to detect DP be off-state this moment, can judge the too high fault of compressor high pressure.So the too high fault of high pressure can only detect with the way of surveying voltage.If when fault is not got rid of, press SR, i.e. KA6 outage, the KA6 closing of contact of Fig. 9 A; The KM Δ is worked again; The KM Δ closing of contact of Fig. 9 B is switched on KA6 once more, and the KA6 contact of Fig. 9 A is broken off; The KM Δ quits work once more, and whether this test fault elimination methods and met in practice.This loop of rotary switch K1 control KA7 is mainly played when manually rotating and is broken off rotary switch K1, during the compressor normal shutdown, and the effect of the auxiliary circuit that resets.Fig. 9 C is the used drawing of student.

The fault electronic switch of simulation refrigeration annex fault also comprises the fault electronic switch 2-ONC of simulation oil pressure protection switch OP fault; Oil pressure protection switch OP fault is provided with a two ends and connects oil pressure protection switch OP; Be provided with oil pressure protection switch OP fault auxiliary circuit is set; Shown in figure 10; This auxiliary circuit comprises oil pressure auxiliary relay KA8 and fault electronic switch 2-ONC, after normally opened contact, oil pressure auxiliary relay KA8 and the fault electronic switch 2-ONC series connection with compressor triangle start contactor KM Δ, is connected the two ends 1/N of power supply successively; After driving the bimetallic strip of its microswitch break-make in the normally closed contact series connection oil pressure protection switch OP of oil pressure auxiliary relay KA8, be connected between the normally opened contact and tie point between the oil pressure auxiliary relay KM8 and power supply one end N of compressor triangle start contactor KM Δ.

Shown in Fig. 6 C; Direct-connected between the 55-56 is an oil pressure protection switch OP; Shown in figure 10, the device that wherein connects between the 308A-N is the bimetallic strip among the oil pressure protection switch OP, and bimetallic strip is heated to certain hour (60s) rear curved; The microswitch that promotes among the oil pressure protection switch OP breaks off, and cuts off compressor power.

Oil pressure protection switch OP fault is provided with auxiliary circuit and is connected on power supply 1, N end, and when O P fault was not set, it is closed that fault is provided with switch 2-ONC; The normal triangle operation of Compressor Group, KM Δ normally opened contact is closed, and relay K A8 is charged; The KA8 normally closed contact of connecting with bimetallic strip is opened; Bimetallic strip does not heat, and can not promote microswitch and break off, and uses multimeter to survey 55, is channel status between 56.When the OP fault was set, fault was provided with switch 2-ONC and opens, and relay K A8 is not charged, and the KA8 normally closed contact of connecting with bimetallic strip is closed, behind the bimetallic strip heating 60s, promoted microswitch and broke off, and cut off compressor power.Use multimeter to survey 55, be off-state between 56.Note: although the oil pressure protection switch does not insert in the refrigeration system, promptly can not form pressure reduction yet, when just switching on, because the time-lag action of 60s, 55, be channel status between 56.And because fault is provided with the effect of auxiliary circuit, only otherwise O P fault is set, the bimetallic strip in the oil pressure protection switch just can not be heated, and just can not promote microswitch yet and break off, and cuts off compressor power.

It is thus clear that, not only lean on the disconnection of circuit that fault is set, the action that also can simulate the refrigeration annex is provided with fault.

Shown in Fig. 6 B, 6C, wherein label 1～106 grade is a fault detect prompting point, and fault electronic switch NC also claims fault number, specifically asks for an interview table 2-4.

Workstation computer drives the break-make of all fault electronic switch NC through I/O input-output card, terminal strip.

Terminal strip adopts 24 road relay output end daughter boards; Its model is PCLD-785B/12V; Comprise the output of 24 electromagnetism SPDT relay drive circuits and No. 24 relay switches; Relay drive circuit is the electronic switch driver module, and relay switch is the electronic switch that relay drive circuit drives, and relay switch has comprised all fault electronic switch NC, fault alarm switch P CLD2-20NO and type selecting electronic switch PCLD2-21NO, PCLD2-22NO, PCLD2-23NO.Workstation computer is successively through the relay switch of the relay drive circuit drive end daughter board of I/O input-output card, terminal strip; I.e. all fault electronic switch NC, fault alarm switch P CLD2-20NO and type selecting electronic switch PCLD2-21NO, PCLD2-22NO, PCLD2-23NO, break-make.

The electronic switch driver module of embodiment one is a relay drive circuit; All fault electronic switch NC, fault alarm switch P CLD2-20NO and type selecting electronic switch PCLD2-21NO, PCLD2-22NO, PCLD2-23NO are the contact switch of relay; Same electronic switch driver module also can be magnetic-holding electric magnet driving circuit, controllable silicon drive circuit or optocoupler driving circuit; Its electronic switch can be contact switch, controllable silicon or the optocoupler output terminal of magnetic-holding electric magnet; Also have other form electronic switch drive module and corresponding electronic switch, action effect is the same.

Details are as follows for three types of refrigerated air-conditioning systems:

(1) air-cooled freezer system; Malfunction counter analog simulation R22 piston refrigerating/heating recurrent state parameter; Malfunction counter electrical equipment control and real system control consistent (main switch, contactor are selected little electric current); The refrigeration annex: oil pressure protection switch OP, high-low pressure protection switch DP/SP, high temperature protection switch WT1, oil heater HT, liquid supply electromagnetic valve SV, temperature controller WJ etc. are consistent with real system; Electric system can be through the computer installation true fault with the refrigeration annex, and fault analysis needs to detect and logic analysis through physical unit with getting rid of.Workflow is seen Figure 11, and the system electrical schematic diagram is seen Figure 12, and system electrical control circuit schematic diagram is seen Figure 13.

Figure 11 is air-cooled Cold Storage Control flow process, and refrigeration unit mainly comprises compressor CM, condensation fan PM1-1, evaporation fan PM4, defrosting well heater WM1 and Ku Men. water inlet well heater WM2.Defrosting is controlled by defrosting timer RSJ automatically, and the number of times that defrosts every day is set up in 24h, and each defrosting time is adjusted in 15～45min.

Cold-storage door is provided with anti-condensation heating wire, and the water inlet of evaporation fan drain pan also is provided with heater strip, can effectively guarantee not condensation and being freezed of cold-storage door, freeing port.The freezer power-up sequence: air switch QF is closed, and under refrigerating state, evaporation fan PM4 starts, and compressor CM starts, and condensation fan PM1-1 starts.When temperature exceeding standard, high temperature protection switch WT1 breaks off, and compressor can't start, if temperature is normal; Then change height pressure protect and oil pressure guard mode over to, respectively by high voltage protective switch DP, low-voltage protective switch SP, oil pressure protection switch OP control, if pressure limit promptly exceeds DP; SP, the range of control of OP, switch promptly breaks off, and then compressor can't start; If normal, then delay protection relay K T2 adhesive, compressor operating.

Figure 12 is air-cooled freezer system electrical schematic diagram, and condensation fan PM1-1, evaporation fan PM4 and compressor CM are that 380V inserts defrosting well heater WM1, Ku Men. water inlet well heater WM2 is that 220V inserts.Figure 13 is the air-cooled freezer system electrical control and operation conditions indicating circuit schematic diagram that 220V inserts, and wherein label is that point is pointed out in fault detect as 23,24 etc., specifically asks for an interview table 2.During normal the operation, the switch 4SB2 that manually touches the button, pushbutton switch 4SB2 is closed, and auxiliary reclay KA4 is closed, and contactor KM4 is closed, and electrothermal relay FR4 is closed, and evaporation fan PM4 startup is normal, and artificial again rotation K1 rotary switch starts compressor CM.Between pushbutton switch 4SB1 and 4SB2, open circuit, that is 23,24 of faulted line segments open circuit and cause evaporation fan PM4 out of service; The fault of this fault number is 1-9NC, and promptly the fault electronic switch 1-9NC of 23,24 of faulted line segments breaks off; If fault 1-10NC is set in server; Then be electrothermal relay FR4 open circuit, detect the break-make situation between No. 104 points and the N line, can make judgement.Other refrigeration part is seen Figure 13 like the detailed control linkage figure of compressor start-stop control etc., and the correspondence position of fault number and faulted line segment sees table 2 for details.

System adopts analog simulation to combine with real equipment, and compressor, condenser, evaporator and the pipeline of dependable performance are simulated with simulation software, and system attachment adopts real equipment with control.

System is provided with a fault electronic switch in each trouble spot, if when this fault is set, then provide a chopping signal, then fault occurs, otherwise connects.The teacher is provided with the system failure through the input fault code in server; The operation abnormality appears in analogue system, and the student is through the break-make situation of circuit in the multimeter detection failure cabinet, if break off; The student should import corresponding trouble spot code in workstation; For relay, also need press the reset switch of relay, fix a breakdown.

(2) screw-type water chiller system; Malfunction counter analog simulation R134a screw bolt refrigerant recurrent state parameter; Malfunction counter electrical equipment control and real system control consistent (main switch, contactor are selected little electric current); The refrigeration annex: oil pressure protection switch OP, high-low pressure protection switch DP, SP, anti-frost protection switch WT2, water flow switch SL, oil heater HT, liquid supply electromagnetic valve SV etc. are consistent with real system; Electric system can be through the computer installation true fault with the refrigeration annex, and fault analysis needs through manually physical unit being detected and adds logic analysis with getting rid of.Workflow is seen Figure 14, and the system electrical schematic diagram is seen Figure 15, and system electrical control circuit schematic diagram is seen Figure 16.

Figure 14 is the handpiece Water Chilling Units control flow, and after air switch QF closure, oily temperature electric heater HT begins heating; Simultaneously, cooling tower PM1 starts, and cooling pump PM2 starts; Thereby cooling water flow switch S L1 is closed, and refrigerating water pump PM3 starts, and chilled water flow switch S L2 is closed; After SL1, SL2 closure, compressor CM starts.This moment, compressor CM got into the high temperature protection state, if the temperature superelevation, high temperature protection switch WT1 breaks off, and compressor CM stops; If temperature is superelevation not, compressor CM then changes the low-temperature protection state over to, if temperature is ultralow, anti-frost protection switch WT2 breaks off; Compressor CM can't start, if temperature is normal, then changes height pressure protect and oil pressure guard mode over to; By high voltage protective switch DP, low-voltage protective switch SP, oil pressure protection switch OP control, if pressure limit, then compressor CM can't start respectively; If normal, solenoid valve SV adhesive, compressor CM operation.

Figure 15 is the water chilling unit system electrical schematic diagram.Cooling tower PM1, cooling pump PM2, refrigerating water pump PM3 and compressor CM are that 380V inserts, and are the order open method.System electrical control and operation conditions indicating circuit schematic diagram that Figure 16 inserts for 220V.Wherein label is a fault detect prompting point as 8,13 etc., specifically asks for an interview table 4.During normal operation, air switch QF11 is closed, the manual work 1SB2 that touches the button at first, and contactor KM1 is closed; Electrothermal relay FR1 is closed, and run indicator HG1 lights, and starts cooling tower PM1, the artificial again 2SB2 button of pressing; Contactor KM2 is closed, starts cooling pump PM2, and the artificial then 3SB2 button of pressing starts refrigerating water pump PM3; At last, artificial rotation K1 rotary switch starts compressor CM.Between 2SB1 and 2SB2, open circuit, that is 9,10 of faulted line segments open circuit; Cause cooling pump PM2 out of service, the fault of this fault number is 1-ONC, and promptly faulted line segment 9; 10 fault electronic switch 1-ONC breaks off, if fault 1-1NC is set in server, then is electrothermal relay FR2 open circuit; Detect the break-make situation between No. 101 points and the N line, can make judgement.Miscellaneous equipment is like cooling tower, refrigerating water pump, and the detailed control linkage figure of oily electric heater etc. sees Figure 16, the correspondence position of fault number and faulted line segment sees table 4 for details.

(3) constant temperature and humidity system, fault setting comprise the control of spray pump liquid level, well heater solid-state relay pulse control, the fan frequency conversion control and belt protection (the motor operation zero pressure difference) control of breaking, the control of filtrator pressure reduction, new return air control etc.Workflow is seen Figure 17, and the system electrical schematic diagram is seen Figure 18, and system electrical control circuit schematic diagram is seen Figure 19.

The constant temperature and humidity unit comprises refrigeration unit (mainly being compressor CM and condensation fan PM1-1), heating unit and humidification unit.Constant temperature and humidity combination wind cabinet has wind outlet section, middle effect section, and fan section, the cold water tray pipeline section, heater segment, the steam humidification section, air return section is just imitated section.Unit has manually, automatically, function such as remote control; And has a perfect alarm and protection function; Comprise defencive functions such as high oil temperature, high exhaust temperature, motor overheating, low oil pressure, low oil temperature, pressure anomaly, low evaporating temperature; When warning occurred, unit just can automatic shutdown protection, and corresponding alarm lamp also can light.Can during near ultimate value, take the certain protection measure, and send warning in some parameters, make unit injury-free.

Figure 17 is the constant temperature and humidity system control flow, and after air switch QF closure, pressure fan PM3 starts, and oily temperature electric heater HT begins heating, and compressor CM starts, and humidifier can humidification.Behind compressor start, change the high temperature protection state immediately over to, if the temperature superelevation, high temperature protection switch WT1 breaks off; Compressor stops, if temperature is normal, then changes height pressure protect and oil pressure guard mode over to, if pressure is normal; Then solenoid valve adhesive, compressor operating, condensation fan operation.

Figure 18 is the constant temperature and humidity system electrical schematic diagram.Condensation fan PM1-1, pressure fan PM3, well heater TM1, humidifier TM2 and compressor CM are 380V and insert.Figure 19 is its 220V connecting system electrical control and operation conditions indicating circuit part.Wherein label is a fault detect prompting point as 17,18 etc., specifically asks for an interview table 3.During normal the operation, air switch QF3 is closed, and button 3SB2 is closed, and contactor KM3 is closed, and electrothermal relay FR3 is closed, and run indicator HG3 lights, and pressure fan PM3 brings into operation.Between 3SB1 and 3SB2, open circuit, that is 18,19 of faulted line segments open circuit; Cause pressure fan PM3 out of service; The fault of this fault number is 1-6NC, if fault 1-7NC is set in server, then opens a way for electrothermal relay FR3; Detect the break-make situation between No. 103 points and the N line, can make judgement.Miscellaneous equipment is like well heater TM1, humidifier TM2, and the detailed control linkage figure of oily electric heater HT etc. sees Figure 19, the correspondence position of fault number and trouble spot sees table 3 for details.

The electrical equipment control similar content of circuit such as handpiece Water Chilling Units, air-cooled freezer system, constant temperature and humidity system, the malfunction counter electric elements comprise all electric elements of using of system and system's actuator and protection annex.The electric elements wiring adopts the normal end daughter board to connect the operation different system; Set each output channel switch by Computer I/O card, assurance system and operation circuit coupling, electric fault are equally by Computer I/(concrete fault is provided with illustrated in table 2 in O card output control; 3,4).--fault alarm--the outage or chargedly the system electric appliance circuits is detected-----computing machine import preliminary failure judgement result (input fault point: between two connection terminals or the wire size, failure message: open circuit, short circuit)--------computing machine carries out recovery operation (reverting to conducting like the judgement open fault) through the I/O card to input fault point (connecting between terminal or wire size), and----it is bright until alarm release pilot lamp in proper working order to rerun system's----for the computing machine input validation of process fault detection: operational system.The input fault result of system is write down automatically by computer server and can carry out automatic scoring according to setting rule (like the time, multiplicity etc.).

The I/O input-output card is connected with terminal strip, and terminal strip is installed in the implicit position of malfunction counter backplate.The mechanical action of corresponding system attachment adopts fault electronic switch and fault that relay setting, and their action is by Computer I/O card output control, and process fault detection is actual to be the state that detects each protection switch.

Fault analysis exclusion process: input fault point (pressure protect title or terminal number, wire size), fault type (open circuit, short circuit).Computing machine is fixed a breakdown according to input results automatic adjustment equipment state, and computing machine has the artificial automatic scoring function of setting.

Fault examination process is following:

Teacher uses the excel file to import workstation to examination examination question (promptly show the 2-4 fault explanation is set) in server, and examination is examined code of points and test time, and the input examinee information is convenient to the examinee and logins, and examination result can be inquired about, prints and derived.

Workstation system comprises: handpiece Water Chilling Units analogue system, constant temperature and humidity wind cabinet analogue system, air-cooled freezer analogue system, the intelligent operation training checking system of air-conditioning electrician.

The student gets into the intelligent operation training checking system of air-conditioning electrician on workstation, can freely select in three systems each.Next:

1, confirms electric cabinet pilot lamp;

2, analyze according to circuit drawing (Figure 11-19);

3, detect input fault information after the fault;

4, the correct workstation computer of failure message can be got rid of this fault automatically, and fault eliminating number of times can be provided with number of faults greater than the native system maximum can influence achievement,

Faulty component: to, input associated terminal number in is then by confirming submit button;

5, when operation electricity cabinet alarm free representes that fault all gets rid of;

6, server can be evaluated practical operation automatically.

Embodiment two:

The fault electronic switch of embodiment two simulation refrigeration annex faults is different with embodiment one, and all the other are identical with embodiment one.Same section is seldom described, and different piece is described in detail as follows:

The fault electronic switch of simulation refrigeration annex fault comprises the fault electronic switch of simulation anti-frost protection switch WT2, high temperature protection switch WT1 and temperature controller WJ fault; Anti-frost protection switch WT2, high temperature protection switch WT1 and temperature controller WJ fault are provided with a two ends and are connected anti-frost protection switch WT2, high temperature protection switch WT1 and temperature controller WJ respectively; The electronic switch driver module of terminal strip comprises the magnetic-holding electric magnet driving circuit; The push rod of magnetic-holding electric magnet promotes the microswitch among anti-frost protection switch WT2, high temperature protection switch WT1 and the temperature controller WJ respectively, the push rod of magnetic-holding electric magnet respectively with anti-frost protection switch WT2, high temperature protection switch WT1 and temperature controller WJ in microswitch constitute the fault electronic switch of said simulation anti-frost protection switch WT2, high temperature protection switch WT1 and temperature controller WJ fault.

The fault electronic switch of simulation refrigeration annex fault comprises the fault electronic switch of simulation chilled water flow switch S L2 fault; Behind the refrigerating water pump PM3 contactor KM3 normally opened contact series connection chilled water flow switch S L2; Be connected chilled water flow switch S L2 fault two ends a little are set; The electronic switch driver module of terminal strip comprises the magnetic-holding electric magnet driving circuit; The push rod of magnetic-holding electric magnet promotes the microswitch among the chilled water flow switch S L2, and the microswitch among the push rod of magnetic-holding electric magnet and the chilled water flow switch S L2 constitutes the fault electronic switch of said simulation chilled water flow switch S L2 fault;

The fault electronic switch of simulation refrigeration annex fault comprises the fault electronic switch of simulation cooling water flow switch S L1 fault; Behind the cooling pump PM2 contactor KM2 normally opened contact series connection cooling water flow switch S L1; Be connected cooling water flow switch S L1 fault two ends a little are set; The electronic switch driver module of terminal strip comprises the magnetic-holding electric magnet driving circuit; The push rod of magnetic-holding electric magnet promotes the microswitch among the cooling water flow switch S L1, and the microswitch among the push rod of magnetic-holding electric magnet and the cooling water flow switch S L1 constitutes the fault electronic switch of said simulation cooling water flow switch S L1 fault;

The fault electronic switch of simulation refrigeration annex fault comprises the fault electronic switch of simulation low-voltage protective switch SP and high voltage protective switch DP fault; Low-voltage protective switch SP and high voltage protective switch DP be connected to low-voltage protective switch with or high voltage protective switch DP fault two ends a little are set; And it is parallelly connected with protection auxiliary relay KA6 normally closed contact; Be provided with high-low pressure protection switch DP/SP fault auxiliary circuit is set; This auxiliary circuit comprises start and stop auxiliary relay KA7 and protection auxiliary relay KA6; Start and stop auxiliary relay KA7 is connected between compressor start and stop rotary switch K1 and the power supply one end N; Successively after the normally opened contact series connection with the normally opened contact of start and stop auxiliary relay KA7, protection auxiliary relay KA6 and compressor triangle start contactor KM Δ; Be connected the two ends 1/N of power supply, the normally opened contact of the normally opened contact two ends parallel connection protection auxiliary relay KM6 of compressor triangle start contactor KM Δ, the electronic switch driver module of terminal strip comprises the magnetic-holding electric magnet driving circuit; The push rod of magnetic-holding electric magnet promotes the microswitch among low-voltage protective switch SP or the high voltage protective switch DP, and the microswitch among the push rod of magnetic-holding electric magnet and low-voltage protective switch SP or the high voltage protective switch DP constitutes the fault electronic switch of said simulation low-voltage protective switch SP or high voltage protective switch DP fault.Auxiliary circuit is set high-low pressure protection switch DP/SP fault and embodiment one is similar; Different is not have reset switch TP; Reason is that to connect in the control circuit is real low-voltage protective switch SP and high voltage protective switch DP; Press the reset switch of low-voltage protective switch SP or high voltage protective switch DP, circuit is connected.

The fault electronic switch of simulation refrigeration annex fault also comprises the fault electronic switch of simulation oil pressure protection switch fault, because of identical with embodiment one, and few the description.

What connect in the fault simulation modular circuit of embodiment two is the annex that freezes really, promptly real anti-frost protection switch WT2, high temperature protection switch WT1, temperature controller WJ, chilled water flow switch S L2, cooling water flow switch S L1, low-voltage protective switch SP, high voltage protective switch DP and oil pressure protection switch OP.And refrigeration annex anti-frost protection switch WT2, high temperature protection switch WT1, temperature controller WJ, chilled water flow switch S L2, cooling water flow switch S L1, low-voltage protective switch SP, high voltage protective switch DP and oil pressure protection switch OP in the fault simulation modular circuit of embodiment one are virtual connections, really are not connected in the circuit.

The embodiment of the invention described above practical application has following characteristics:

(1) basic module setting has that to use ubiquity, technical advance and development perspective.

(2) analogue system dynamic similation; Similar with real system; Fault real standard cabinet control circuit and refrigeration air-conditioner annex adopt and the same or analogous components and parts of real equipment, and the analog parameter of system's operation comprises cold-producing medium parameter and refrigerating medium parameter etc., and theoretical actual conjugation is good.

(3) system has used a plurality of auxiliary circuits neatly, in conjunction with automatic control technology, has rationalization, digitizing, intellectuality, simulated characteristics, and refrigeration air-conditioner training system function is strengthened greatly, and more convenient to operate, operation is more near actual.

(4) through many workstation student machine of server may command, can many people give examination simultaneously training, each student has designated user name and password, and complete operation test training archive is arranged.

(5) physical device can't be provided with various faults because of the limitation of conditions, upgrades slowly, and there is the safeguard protection problem in operation, and that software fault of the present invention is provided with is wide, can constantly upgrade, and handling safety, efficiency of teaching is high.

(6) carry out fault through server and set, but according to fault setup menu automatic problem building, all around fault is provided with difference.System has 200 parts of surpassing that fault can be set, and the theoretical number of combinations of test item bank is big, and it is little that examination question repeats probability.The fault setting is carried out information management with eliminating by server, examines just, fair, efficient.

Claims (6)

1. the area of computer aided of a big-and-middle-sized Refrigeration and Air-conditioning Engineering is overhauled analogue system; Comprise computing machine, I/O input/output module, electronic switch driver module and big-and-middle-sized refrigerated air-conditioning system electric control circuit fault simulation module; Said fault simulation module comprises big-and-middle-sized refrigerated air-conditioning system electric control circuit and is located at each fault of this control circuit fault electronic switch a little is set, and computing machine is successively through the break-make of I/O input/output module, each fault electronic switch of electronic switch driver module driving; Said big-and-middle-sized refrigerated air-conditioning system electric control circuit is provided with polytype, and said fault simulation module also comprises wherein one type system type selection circuit of selection, and said electronic switch driver module drive system type selecting circuit is selected; Said system type selects circuit to comprise a plurality of type selecting electronic switches and corresponding a plurality of banked relay; After each type selecting electronic switch and the series connection of corresponding banked relay; Be connected in parallel on the power supply two ends; The switch contact of banked relay is connected on the power supply loop of the refrigeration part electric control circuit in the corresponding big-and-middle-sized refrigerated air-conditioning system, and said electronic switch driver module drives the break-make of type selecting electronic switch, it is characterized in that:

Said big-and-middle-sized refrigerated air-conditioning system electric control circuit is provided with three types of handpiece Water Chilling Units electric control circuits, constant temperature and humidity electric control circuit, air-cooled freezer electric control circuit; Refrigeration part electric control circuit in these three types comprises cooling tower (PM1), cooling pump (PM2) starting or stopping control circuit of handpiece Water Chilling Units; Pressure fan (PM3) starting or stopping control circuit of refrigerating water pump of handpiece Water Chilling Units (PM3) or constant temperature and humidity; (PM4) start and stop of the evaporation fan of air-cooled freezer and running control circuit; The condensation fan of air-cooled freezer or constant temperature and humidity (PM1-1) running control circuit; The well heater of constant temperature and humidity (TM1), humidifier (TM2) running control circuit, the defrosting well heater (WM1) of air-cooled freezer, Ku Men. compressor (CM) start and stop and the running control circuit of water inlet well heater (WM2) running control circuit and handpiece Water Chilling Units, air-cooled freezer or constant temperature and humidity;

Said system type selects circuit to comprise handpiece Water Chilling Units, constant temperature and humidity, three type selecting electronic switches of air-cooled freezer (PCLD2-21NO, PCLD2-22NO, PLCD2-23NO) and corresponding handpiece Water Chilling Units, constant temperature and humidity, three banked relays of air-cooled freezer (KA1, KA2, KA3); After handpiece Water Chilling Units type selecting electronic switch (PCLD2-21NO) and handpiece Water Chilling Units banked relay (KA1), constant temperature and humidity type selecting electronic switch (PCLD2-22NO) and constant temperature and humidity banked relay (KA2), air-cooled freezer type selecting electronic switch (PCLD2-23NO) and air-cooled freezer banked relay (KA3) are connected respectively; Be connected in parallel on power supply two ends (1/N); Said electronic switch driver module drives the break-make of handpiece Water Chilling Units type selecting electronic switch (PCLD2-21NO), constant temperature and humidity type selecting electronic switch (PCLD2-22NO), air-cooled freezer type selecting electronic switch (PLCD2-23NO) respectively; The normally opened contact of handpiece Water Chilling Units banked relay (KA1) is connected on cooling tower (PM1), the cooling pump (PM2) of handpiece Water Chilling Units, the power supply loop of compressor (CM) starting or stopping control circuit, and normally closed contact is connected on the power supply loop of condensation fan (PM1-1) running control circuit of air-cooled freezer or constant temperature and humidity; The normally opened contact of constant temperature and humidity banked relay (KA2) is connected on well heater (TM1), humidifier (TM2) running control circuit of constant temperature and humidity, the power supply loop of compressor (CM) starting or stopping control circuit; The normally opened contact of air-cooled freezer banked relay (KA3) is connected on evaporation fan (PM4) starting or stopping control circuit, compressor (CM) start and stop and running control circuit, defrosting well heater (WM1), the Ku Men of air-cooled freezer. and the power supply loop of water inlet well heater (WM2) running control circuit, normally closed contact are connected on the power supply loop of compressor (CM) running control circuit of pressure fan (PM3) starting or stopping control circuit, handpiece Water Chilling Units or constant temperature and humidity of refrigerating water pump (PM3) or the constant temperature and humidity of handpiece Water Chilling Units.

2. analogue system according to claim 1; It is characterized in that: saidly be located at big-and-middle-sized each fault of refrigerated air-conditioning system electric control circuit the fault electronic switch that a little fault electronic switch comprises analog line break-make fault is set, this fault electronic switch is connected the circuit on-off fault two ends a little is set; Comprise the fault electronic switch of simulation thermal relay normally closed contact fault, this fault electronic switch is connected the thermal relay normally closed contact fault two ends a little is set; Or comprise the fault electronic switch of simulation refrigeration annex fault.

3. analogue system according to claim 2 is characterized in that: said refrigeration annex comprises anti-frost protection switch (WT2), high temperature protection switch (WT1), temperature controller (WJ), chilled water flow switch (SL2), cooling water flow switch (SL1), low-voltage protective switch (SP), high voltage protective switch (DP) or oil pressure protection switch (OP);

The fault electronic switch of said simulation refrigeration annex fault,

Comprise the fault electronic switch (1-18NC, 1-17NC or 2-1NC) of simulating anti-frost protection switch (WT2), high temperature protection switch (WT1) or temperature controller (WJ) fault; This fault electronic switch (1-18NC, 1-17NC or 2-1NC) is connected anti-frost protection switch (WT2), high temperature protection switch (WT1) or temperature controller (WJ) fault two ends a little is set, virtual connection anti-frost protection switch (WT2), high temperature protection switch (WT1) or temperature controller (WJ) on it;

The fault electronic switch (1-15NC or 1-16NC) that comprises simulation chilled water flow switch (SL2) or cooling water flow switch (SL1) fault; This fault electronic switch (1-15NC or 1-16NC) and refrigerating water pump (PM3) or cooling pump (PM2) contactor normally opened contact mutually are connected chilled water flow switch (SL2) after the series connection or cooling water flow switch (SL1) fault is provided with two ends a little, virtual connection chilled water flow switch (SL2) or cooling water flow switch (SL1) on it;

The fault electronic switch (1-23NC or 2-12NC) that comprises simulation low-voltage protective switch (SP) or high voltage protective switch (DP) fault; This fault electronic switch (1-23NC or 2-12NC) is connected low-voltage protective switch (SP) or high voltage protective switch (DP) fault is provided with two ends a little; And it is parallelly connected mutually with protection auxiliary relay (KA6) normally closed contact; Virtual connection low-voltage protective switch (SP) or high voltage protective switch (DP) on it; Be provided with low-voltage protective switch (SP) or high voltage protective switch (DP) fault is provided with auxiliary circuit; This auxiliary circuit comprises start and stop auxiliary relay (KA7), protection auxiliary relay (KA6) and reset switch (TP); Start and stop auxiliary relay (KA7) is connected between compressor start and stop rotary switch (K1) and power supply one end (N); After the normally opened contact series connection with the normally opened contact of start and stop auxiliary relay (KA7), reset switch (TP), protection auxiliary relay (KA6) and compressor triangle start contactor (KM Δ), be connected the two ends (1/N) of power supply successively, the normally opened contact of auxiliary relays (KA6) is protected in the normally opened contact two ends parallel connection of compressor triangle start contactor (KM Δ);

Or comprise the fault electronic switch (2-ONC) of simulation oil pressure protection switch (OP) fault; Oil pressure protection switch (OP) fault is provided with a two ends and connects oil pressure protection switch (OP); Be provided with oil pressure protection switch (OP) fault auxiliary circuit is set; This auxiliary circuit comprises the fault electronic switch (2-ONC) of oil pressure auxiliary relay (KA8) and said simulation oil pressure protection switch (OP) fault; Successively after normally opened contact, oil pressure auxiliary relay (KA8) and the series connection of this fault electronic switch (2-ONC) with compressor triangle start contactor (KM Δ); Be connected the two ends (1/N) of power supply; After driving the bimetallic strip of its microswitch break-make in the normally closed contact of oil pressure auxiliary relay (KA8) the series connection oil pressure protection switch (OP), the normally opened contact that is connected compressor triangle start contactor (KM Δ) and the tie point between the oil pressure auxiliary relay (KA8) and simulate between the tie point of fault electronic switch (2-ONC) and power supply one end (N) of oil pressure protection switch (OP) fault.

4. analogue system according to claim 2 is characterized in that: said refrigeration annex comprises anti-frost protection switch (WT2), high temperature protection switch (WT1), temperature controller (WJ), chilled water flow switch (SL2), cooling water flow switch (SL1), low-voltage protective switch (SP), high voltage protective switch (DP) or oil pressure protection switch (OP);

The fault electronic switch of said simulation refrigeration annex fault,

Comprise the fault electronic switch of simulating anti-frost protection switch (WT2), high temperature protection switch (WT1) or temperature controller (WJ) fault; Anti-frost protection switch (WT2), high temperature protection switch (WT1) or temperature controller (WJ) fault are provided with a two ends and connect anti-frost protection switch (WT2), high temperature protection switch (WT1) or temperature controller (WJ); Said electronic switch driver module comprises the magnetic-holding electric magnet driving circuit; The push rod of magnetic-holding electric magnet promotes the microswitch in anti-frost protection switch (WT2), high temperature protection switch (WT1) or the temperature controller (WJ), and the microswitch in the push rod of magnetic-holding electric magnet and anti-frost protection switch (WT2), high temperature protection switch (WT1) or the temperature controller (WJ) constitutes the fault electronic switch of said simulation anti-frost protection switch (WT2), high temperature protection switch (WT1) or temperature controller (WJ) fault;

The fault electronic switch that comprises simulation chilled water flow switch (SL2) fault; Behind refrigerating water pump contactor (KM3) the normally opened contact series connection chilled water flow switch (SL2); Be connected chilled water flow switch (SL2) fault two ends a little are set; Said electronic switch driver module comprises the magnetic-holding electric magnet driving circuit; The push rod of magnetic-holding electric magnet promotes the microswitch in the chilled water flow switch (SL2), and the microswitch in the push rod of magnetic-holding electric magnet and the chilled water flow switch (SL2) constitutes the fault electronic switch of said simulation chilled water flow switch (SL2) fault;

The fault electronic switch that comprises simulation cooling water flow switch (SL1) fault; Behind cooling pump contactor (KM2) the normally opened contact series connection cooling water flow switch (SL1); Be connected cooling water flow switch (SL1) fault two ends a little are set; Said electronic switch driver module comprises the magnetic-holding electric magnet driving circuit; The push rod of magnetic-holding electric magnet promotes the microswitch in the cooling water flow switch (SL1), and the microswitch in the push rod of magnetic-holding electric magnet and the cooling water flow switch (SL1) constitutes the fault electronic switch of said simulation cooling water flow switch (SL1) fault;

The fault electronic switch that comprises simulation low-voltage protective switch (SP) or high voltage protective switch (DP) fault; Low-voltage protective switch (SP) or high voltage protective switch (DP) are connected low-voltage protective switch (SP) or high voltage protective switch (DP) fault is provided with two ends a little; And it is parallelly connected with protection auxiliary relay normally closed contact; Be provided with low-voltage protective switch (SP) or high voltage protective switch (DP) fault is provided with auxiliary circuit; This auxiliary circuit comprises start and stop auxiliary relay and protection auxiliary relay; The start and stop auxiliary relay is connected between compressor start and stop rotary switch and power supply one end; Successively after the normally opened contact series connection with the normally opened contact of start and stop auxiliary relay, protection auxiliary relay and compressor triangle start contactor; Be connected the two ends of power supply, the normally opened contact of the normally opened contact two ends parallel connection protection auxiliary relay of compressor triangle start contactor, said electronic switch driver module comprises the magnetic-holding electric magnet driving circuit; The push rod of magnetic-holding electric magnet promotes the microswitch in low-voltage protective switch (SP) or the high voltage protective switch (DP), and the microswitch in the push rod of magnetic-holding electric magnet and low-voltage protective switch (SP) or the high voltage protective switch (DP) constitutes the fault electronic switch of said simulation low-voltage protective switch (SP) or high voltage protective switch (DP) fault;

Or comprise the fault electronic switch (2-ONC) of simulation oil pressure protection switch (OP) fault; Oil pressure protection switch (OP) fault is provided with a two ends and connects oil pressure protection switch (OP); Be provided with oil pressure protection switch (OP) fault auxiliary circuit is set; This auxiliary circuit comprises the fault electronic switch (2-ONC) of oil pressure auxiliary relay (KA8) and said simulation oil pressure protection switch (OP) fault; Successively after normally opened contact, oil pressure auxiliary relay (KA8) and the series connection of this fault electronic switch (2-ONC) with compressor triangle start contactor (KM Δ); Be connected the two ends (1/N) of power supply; After driving the bimetallic strip of its microswitch break-make in the normally closed contact of oil pressure auxiliary relay (KA8) the series connection oil pressure protection switch (OP), the normally opened contact that is connected compressor triangle start contactor (KM Δ) and the tie point between the oil pressure auxiliary relay (KA8) and simulate between the tie point of fault electronic switch (2-ONC) and power supply one end (N) of oil pressure protection switch (OP) fault.

5. analogue system according to claim 2; It is characterized in that: said electronic switch driver module comprises relay drive circuit, magnetic-holding electric magnet driving circuit, controllable silicon drive circuit or optocoupler driving circuit, the contact switch that said fault electronic switch is a relay, the contact switch of magnetic-holding electric magnet, controllable silicon or optocoupler output terminal.

6. analogue system according to claim 1; It is characterized in that: said electronic switch driver module comprises relay drive circuit, magnetic-holding electric magnet driving circuit, controllable silicon drive circuit or optocoupler driving circuit, the contact switch that said type selecting electronic switch is a relay, the contact switch of magnetic-holding electric magnet, controllable silicon or optocoupler output terminal.

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