CN2788205Y - Air conditioner controlled circuit fault diagnosis testing device - Google Patents
Air conditioner controlled circuit fault diagnosis testing device Download PDFInfo
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- CN2788205Y CN2788205Y CNU2004200548357U CN200420054835U CN2788205Y CN 2788205 Y CN2788205 Y CN 2788205Y CN U2004200548357 U CNU2004200548357 U CN U2004200548357U CN 200420054835 U CN200420054835 U CN 200420054835U CN 2788205 Y CN2788205 Y CN 2788205Y
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Abstract
The utility model relates to an air conditioner controlled circuit fault diagnosis testing device which is mainly composed of an air conditioner refrigerating/ heating circulation system and a control system used for maintaining normal work of a refrigerating circulation system. A control circuit of a typical air conditioner is disassembled into unit function circuits or single row elements which are grafted to socket connectors, and a plurality of row modules can be formed. The decided scheme and verified improved design scheme can be carried out by combining the row modules on a jack board according to a certain way. A fault module is used for replacing a corresponding normal module, the air conditioner is operated, the corresponding fault indication appearing in a control system can be observed, and the relationship among the fault module, a fault element, the fault indication and a fault signature can be recorded, and the fault element or a fault unit of an actual air conditioner under the certain fault signature can be reversely reasoned on the basis of the coincidence relationship. The utility model has the characteristics of high safety, high versatility, high interference immunity, etc.
Description
Technical field
The utility model relates to steam compression type refrigeration air-conditioning equipment trouble-shooter, particularly relates to a kind of experimental installation for failure diagnosis of modular air conditioner device control circuit. Belong to refrigeration plant control circuit detection technique field.
Background technology
Along with the raising of socioeconomic development and living standards of the people, air-conditioner has been widely used in huge numbers of families. Whether the normal operation of air-conditioner, having a strong impact on people's quality of life. There is data to show, the fault of air-conditioner, 60% comes from the damage of control circuit. As seen, the air conditioner control circuit of development module and experimental installation for failure diagnosis thereof, the maintenance level to the ac control circuit that improves people has important realistic meaning.
Why air conditioner control circuit breaks down easily, and the one, because the quality problems of components and parts; Another reason is too much defencive function, so that component number increases, has caused the system dependability reduction.
At present, the control circuit of China's room air conditioner nearly all is integrated form, and components and parts are various, and circuit is comparatively complicated. The feasibility of design and improved design project usually need to again be made surface-mounted integrated circuit and be implemented and verify, neither handled easily has also increased the expense of designing and developing simultaneously. On the other hand, for the finished product air-conditioner, in case the control circuit fault appears in air-conditioner in the use procedure, even adopt advanced instrument to check, the maintenance personal also can come because this circuit board being unfamiliar with the fault components and parts that are difficult to judge rapidly and accurately in the control circuit. In the repair procedures, often the air conditioner fault circuit board is made integral replacing and process, this has only damaged the wiring board of one or several element for great majority, is undoubtedly a kind of waste.
The air conditioner control circuit that design is succinct, the control quality is good, reliability is high, easy to maintenance, and the reduction maintenance cost is that the air-conditioner user is to the generally requirement of project planner and manufacturer.
Summary of the invention
Technical problem to be solved in the utility model is, for the situations such as the fault diagnosis accuracy rate is low in checking difficulty and the maintenance process after the existing air conditioner control circuit design, a kind of with low cost, safe and reliable, easy to operate experimental installation for failure diagnosis of air conditioner control circuit is proposed.
The utility model is to take following technical scheme to realize:
The failure diagnosis of air conditioner control circuit device comprises the refrigerating/heating circulatory system and indication control panel, it is characterized in that it also comprises experimental operation table and experiment module. The described refrigerating/heating circulatory system is comprised of compressor, four way solenoid valve, condenser, fan, evaporimeter, capillary and check valve, compressor is connected with four way solenoid valve, four way solenoid valve, condenser, evaporimeter, capillary and check valve are connected in series, and fan places by condenser and the evaporimeter; The control interface of control device, indicating device and the refrigerating/heating circulatory system is installed on the described control panel; On the described experimental operation table standard orifice plate is housed, described experiment module is formed in the standard module plug-in unit by the electronic devices and components grafting, and each experiment module cooperatively interacts, and consists of ac control circuit.
Aforesaid failure diagnosis of air conditioner control circuit device; it is characterized in that the indicating controller spare on the wherein said control panel comprises refrigeration system high and low pressure side refrigerant pressure dial gauge; earth leakage protective device; main power switch; fuse; the main power voltage table; the total working ammeter; compressor of air conditioner, four way solenoid valve, fan high wind, fan apoplexy, the weak wind relay coil operating current table of fan and compressor, four way solenoid valve, fan high wind, fan apoplexy, the weak wind relay indicating light of fan in the working relay group; master integrated circuit chip operating voltage indicator lamp, the control signal input interface.
Aforesaid failure diagnosis of air conditioner control circuit device is characterized in that wherein said control signal input interface comprises compressor control signal, fan control signal, reversal valve control signal input interface.
Aforesaid failure diagnosis of air conditioner control circuit device is characterized in that wherein said experiment module comprises temperature control circuit module, remote control circuit module, crystal oscillating circuit module, ultralow pressure holding circuit module, reset circuit module, master integrated circuit chip module, signal converter ic chip module, control compressor operating relay module, control four way solenoid valve relay module, control fan motor rotational speed relay module, 5V power module and 12V power module. Temperature control circuit module, remote control circuit module, crystal oscillating circuit module, ultralow pressure holding circuit module, reset circuit module and 5V voltage module assign in the jack of the standard orifice plate on the operating platform, link to each other with a batter contact of master integrated circuit chip module respectively, another batter contact of master integrated circuit chip module and 12V power supply are connected to the pin contact of signal converter ic chip module one side, and the compressor of air conditioner that another batter contact of signal converter ic chip module connects respectively in the control relay group moves relay coil, four way solenoid valve relay coil, fan high wind shelves are used relay with relay coil, weak wind shelves with relay coil, apoplexy shelves coil; Compressor of air conditioner operation relay module in the control relay group, four way solenoid valve relay module, fan high wind shelves usefulness relay module, apoplexy shelves are distinguished the parallel operation voltage indicator lamp with relay module and weak wind shelves with relay module.
The moving together contact of the compressor operating relay in the control relay group, the coil of the compressor operating relay in the working relay group, the ammeter 1 and the 12V power circuit that are installed on the panel are connected in series. The moving together contact of the compressor operating relay in the working relay group is serially connected in the cooler compressor work loop.
Four way solenoid valve in the control relay group is connected in series with the 12V power circuit with the coil of relay, the ammeter 2 that is installed on the panel with the moving together contact of relay, four way solenoid valve in the working relay group. Four way solenoid valve in the working relay group is serially connected in the four way solenoid valve work loop with the moving together contact of relay.
High wind shelves in the control relay group are connected in series with the 12V power circuit with the coil of relay, the ammeter 3 that is installed on the panel with the moving together contact of relay, high wind shelves in the working relay group. High wind shelves in the working relay group are serially connected in the work loop of fan high wind shelves winding with the moving together contact of relay.
Apoplexy shelves in the control relay group are connected in series with the 12V power circuit with the coil of relay, the ammeter 4 that is installed on the panel with the moving together contact of relay, apoplexy shelves in the working relay group. Apoplexy shelves in the working relay group are serially connected in the work loop of fan apoplexy shelves winding with the moving together contact of relay.
Low wind shelves in the control relay group are connected in series with the 12V power circuit with the coil of relay, the ammeter 5 that is installed on the panel with the moving together contact of relay, low wind shelves in the working relay group. Low wind shelves in the working relay group are serially connected in the work loop of the low wind shelves winding of fan with the moving together contact of relay.
12V control supply voltage has the voltmeter indication at panel, and the compressor operating relay in master integrated circuit chip, the working relay group, four way solenoid valve are equipped with operating voltage indicator lamp indication with relay at panel with relay, the weak wind shelves of fan with relay, fan apoplexy shelves with relay, fan high wind shelves.
Operation principle of the present utility model is: the refrigerating/heating circulatory system, indication control panel, experimental operation table, common form " experimental installation for failure diagnosis of air conditioner control circuit " such as experiment module. Be illustrated in figure 1 as the refrigerating/heating circulatory system of the present invention, compressor becomes refrigerant vapor compression the saturated gas of high pressure-temperature, send into condenser through four way solenoid valve, be condensed into highly pressurised liquid, again through the capillary-compensated step-down, evaporation endothermic in evaporimeter forms the lower temperature environment, reaches the purpose of refrigeration air-conditioner. Cold-producing medium after the vaporization is sucked recompression by compressor again, enters next time circulation. When heating, as long as the flow direction of conversion four way solenoid valve makes cold-producing medium flow into first evaporimeter, the capillary-compensated of flowing through is again sent into condenser. Refrigeration and the conversion that heats state have so just been realized.
Air conditioner control system is by indicating control panel, distribution experiment operation platform, experiment module plug-in unit composition. The connected mode of control circuit as shown in Figure 2.
Earth leakage protective device, main power switch, fuse, main power voltage, electric current indication etc. are used for providing the experiment basic guarantee to experiment instrument itself and operating personnel. The indication of the current/voltage of control relay, working relay is used to indicate the duty of relay, is judge module work normal foundation whether in the experimental implementation process. Signaling interface is used for the control signal of experimentation is input in the refrigerating/heating circulatory system, finishes the output of experimental implementation signal.
The grafting of electronic devices and components in experimental circuit difference in the standard module plug-in unit, is formed the one by one standard test module of functional independence. Experimental operation table is provided with standard orifice plate, utilizes the jack on it, the standard test module can be coupled together the air-conditioner experimental circuit that is built into designed, designed. In the experimentation, control circuit provides a control signal, this control signal causes the control relay action, the action of control relay produces a M signal, this intermediate control signal is through " control signal input interface " control working relay action of panel, and air conditioning function is finished in the co-ordinations such as the compressor of a plurality of working relays final control cooling/heating circulatory system under the guidance of control circuit, fan, four way solenoid valve. Adopt the malfunction test module to replace the standard test module, the various modules presentation of rear generation that breaks down in the research ac control circuit, and then by the position of presentation location air-condition faults, reach the quick judgement to air-condition faults.
When there are deviation in actual temperature and design temperature, when remote controller is assigned a refrigeration (/ heat) instruction, remote control is accepted to send into the processing of master integrated circuit chip after circuit is received instruction, if the master integrated circuit chip obtains the 5V power supply, then the working signal lamp 6 on the panel is bright, control master integrated circuit output pin level forms refrigeration (/ heat), high wind/apoplexy/low wind, run signal. After the signal converter ic chip of working under the 12V voltage obtained instruction, to the corresponding relay coil power supply in the control relay group, the portable lamp of simultaneously corresponding relay module top was lighted. Corresponding relay coil get electric after, the moving together contact adhesive of corresponding relay, corresponding relay coil gets electric in the working relay group, the moving together contact adhesive of corresponding relay, refrigeration device must be established the operation of beginning by cable, corresponding ammeter on the panel is indicated to some extent, and the relay indicating light of running refrigerating device is lit. After the refrigeration compressor normal operation, temperature-sensing element in the temperature control circuit is sent into the temperature signal that senses incessantly master integrated circuit and is compared with setting value, when the temperature that senses is higher than (/ be lower than) setting value, signal converter ic chip is kept original instruction, refrigeration plant continuation maintenance refrigeration (/ heat) running status. When the temperature that senses is lower than (/ be higher than) when equaling to set value, master integrated circuit is just assigned instruction out of service, after signal converter ic chip obtains instruction, the operation relay coil of the compressor in the cutting-off controlling relay group and the power supply of corresponding relay coil, the relay indicating light of compressor operating relay module top extinguishes simultaneously. After the compressor operating relay coil dead electricity in the control relay group, its moving together contact disconnects, force the operation relay coil dead electricity in the working relay group, the moving together contact of the operation relay in the working relay group disconnects, refrigeration compressor and condenser fan quit work, simultaneously the pointer nulling of the ammeter 1 on the indication panel.
The temperature of experiencing when temperature controller is higher than (/ be lower than) design temperature, and temperature control module is just sent into again a signal and processed to the master integrated circuit chip, assigns refrigeration (/ heat) instruction.
When compressor operating voltage is very low, the work of ultralow pressure holding circuit, the master integrated circuit chip is assigned the shutdown run signal, and signal converter ic chip produces the driving signal and sends to the control relay group. Operation relay coil dead electricity in the control relay group, its moving together contact disconnects, and the relay coil in the working relay group will dead electricity, and its moving together contact disconnects, and compressor is out of service, reaches the protection purpose.
Adopt the power circuit malfunctioning module, replace the standard test module, the analog power fault is by the various signs of indicated number power failure; Adopt the crystal oscillating circuit malfunctioning module, replace the standard test module, analogue crystals oscillator fault, oscillating capacitance faults etc. are by the various signs of indicated number crystal oscillating circuit fault; Adopt the remote-control receiving circuit malfunctioning module, replace the standard test module, analog telecommand receiver module fault, filter capacitor fault etc. are by the various signs of indicated number remote-control receiving circuit fault; Adopt the temperature control circuit malfunctioning module, replace the standard test module, analog temperature sensing element device fault is by the various signs of indicated number temperature control circuit fault; Adopt the Fault of Integrated Circuits module, or replace the standard test module with the chip that damages, the Analogous Integrated Electronic Circuits fault is by the various signs of indicated number Fault of Integrated Circuits; Adopt the output circuit malfunctioning module, replace the standard test module, the analog output circuit fault is by the various signs of indicated number output circuit fault; Adopt ultralow pressure holding circuit malfunctioning module, replace the standard test module, simulation ultralow pressure holding circuit misoperation and the fault of being failure to actuate are by the various signs of indicated number ultralow pressure holding circuit fault. Write various fault signatures, compare with the fault performance of actual air-conditioner, can conclude the true fault of actual air-conditioner.
The principal character of experimental installation for failure diagnosis of air conditioner control circuit is that experiment operator can be built specific or self-designed ac control circuit at operating platform according to the intention of oneself, by changing experiment module, can simulate air-condition faults. Can infer trouble unit or the defective device of control circuit by the air-condition faults sign.
Experimental installation for failure diagnosis of air conditioner control circuit also has following feature: (1) has the close function of market air-conditioner, namely has power circuit, crystal oscillating circuit, temperature control circuit, remote-control receiving circuit, integrated circuit, output circuit and ELV holding circuit. (2) adopt the common cooperating of two group relaies, one group of control relay on the utilization operating desk comes " working relay " of Reality simulation ac control circuit, working relay is stashed, supply with the working relay coil voltage by the triggering of control relay and start refrigeration compressor and relevant device, forceful electric power and the light current of effectively having isolated platform are guaranteed the safety of experiment operator.
The utility model successfully designs and has detected the air conditioner control circuit scheme on " ac control circuit experimental installation for failure diagnosis "; Extract by fault signature, realized the diagnosis of different control circuit faults. It has following advantage:
(1) good security. Adopt the common cooperating of two group relaies, make " ac control circuit experimental installation for failure diagnosis " operation on the desktop plug-in unit and the device of connection, all be in the light current state, solve the operating safety of " ac control circuit experimental installation for failure diagnosis ", intactly kept again the original structure of control circuit simultaneously.
(2) easy to operate. Employing standard control interface, control requires the designed, designed control circuit according to the difference of air-conditioner, and tests at platform and to connect and checking. Use effective combination of indicator lamp and ammeter, can roughly orient the fault that simulates in the experimentation, through further measuring, can orient soon location of fault.
(3) cheap. Modular structure has strengthened the configurable ability that experimental provision operates flexibly, has reduced the cost of device.
Description of drawings
Fig. 1 is the cooling cycle system of " experimental installation for failure diagnosis of air conditioner control circuit ", and it is comprised of parts such as compressor 1, four way solenoid valve 2, condenser 3, fan 4, evaporimeter 5, capillary 6 and check valves 7.
Fig. 2 is the control system block diagram of " experimental installation for failure diagnosis of air conditioner control circuit ", and it is by indicating control panel, distribution experiment operation platform, experiment module plug-in unit composition. Control circuit and forceful electric power controlled device that it comprises the instrument indicating circuit, is comprised of unit of function circuit.
Fig. 3 is implementation " experimental installation for failure diagnosis of air conditioner control circuit " control system circuit diagram.
Fig. 4 is implementation " experimental installation for failure diagnosis of air conditioner control circuit " panel.
Fig. 5 is the ultralow pressure holding circuit of the utility model experimental installation for failure diagnosis of air conditioner control circuit.
Fig. 6 is the crystal oscillating circuit of the utility model experimental installation for failure diagnosis of air conditioner control circuit.
Fig. 7 is the remote-control receiving circuit of the utility model experimental installation for failure diagnosis of air conditioner control circuit.
Fig. 8 is the temperature control circuit of the utility model experimental installation for failure diagnosis of air conditioner control circuit.
Fig. 9 is the reset circuit of the utility model experimental installation for failure diagnosis of air conditioner control circuit.
Figure 10 is the 12V power circuit of the utility model experimental installation for failure diagnosis of air conditioner control circuit.
Figure 11 is the 5V power circuit of the utility model experimental installation for failure diagnosis of air conditioner control circuit.
The specific embodiment
Shown in Fig. 1～3, be the concrete example of the utility model " experimental installation for failure diagnosis of air conditioner control circuit ". Major parameter wherein: 1. resistance: 1/4w, resistance is seen among Fig. 3 and is marked. 2. electric capacity: withstand voltage 25V, capacity see among Fig. 3 and mark. 3. regulator block: model 7805. 4. diode: 4007. 5. triode: 9012,9013. 6. relay: 12V; Fan: 5A; Compressor: 20A. 7. IC chip: GF775-04/P, TD62004AP. 8. buzzer: DC12V. 9. crystal oscillator: 4MHz.
1. air-conditioner experiment control circuit criteria modular design
Analyze air conditioner control circuit, carry out the partition of circuit function unit, functional unit or device grafting are formed different standard test modules to plug-in unit. Air conditioner control circuit is split into the modules such as power circuit, crystal oscillating circuit, remote-control receiving circuit, temperature control circuit, integrated circuit, output circuit and ultralow pressure holding circuit; again various standard modules are inserted in the jack of the standard orifice plate on the operating platform on request, form air-conditioner experiment control circuit.
Power circuit comprises 12V power circuit and 5V power circuit, is comprised of rectification circuit, mu balanced circuit and filter capacitor; Power circuit standard test module is comprised of apportion components and parts connector. Crystal oscillating circuit is comprised of crystal oscillator and peripheral circuit, and crystal oscillating circuit is the basis of IC chip work for the master integrated circuit chip provides clock signal; Crystal oscillating circuit standard test module is comprised of apportion components and parts connector. Remote-control receiving circuit is comprised of remote control reception element and peripheral circuit thereof, and remote-control receiving circuit is the main thoroughfare of ac control circuit and extraneous exchange message; Remote-control receiving circuit standard test module is comprised of apportion components and parts connector. Temperature control circuit is comprised of temperature sensor and peripheral circuit thereof, and temperature control circuit standard test module is comprised of apportion components and parts connector. Integrated circuit is the heart of ac control circuit, particularly master integrated circuit, in case break down, whole ac control circuit is paralysis just; In this experimental provision control circuit, have two IC chips, master integrated circuit chip and signal converter ic chip all are designed to standard test module connector. Output circuit is used for amplifying the various control signals of output, and output circuit breaks down, and then controls just ineffective; Output circuit standard test module also is comprised of apportion components and parts connector. Integrated circuit may be exported abnormal control signal under the ELV state, brownout, and holding circuit output control signal is not worked integrated circuit; Ultralow pressure holding circuit standard test module is comprised of apportion components and parts connector.
1. be illustrated in figure 5 as ultralow pressure holding circuit of the present utility model. Input signal is the 5V DC voltage, and DC voltage is crossed when hanging down and made the voltage between be lower than 0.7V, and the triode cut-off is output as 0, and master integrated circuit quits work. When 5V voltage was normal, the triode normally was output as 5V voltage, the master integrated circuit normal operation. During the circuit normal operation, output signal is exported high level again after amplifying processing, as fault indication signal.
2. be illustrated in figure 6 as crystal oscillating circuit of the present utility model. 4MHz crystal oscillator and 2 30PF electric capacity consist of resonance circuit, and linking to each other with the master integrated circuit oscillator produces oscillator signal. During the circuit normal operation, output signal is exported high level again after amplifying processing, as fault indication signal.
3. be illustrated in figure 7 as remote-control receiving circuit of the present utility model. Form filter power supply by R1 and C1 and power to receiver of remote-control sytem, remote signal receiver receives remote information and send the remote signal processor of master integrated circuit to process by output, produces guidance command. During the circuit normal operation, output signal is exported high level again after amplifying processing, as fault indication signal.
4. be illustrated in figure 8 as temperature control circuit of the present utility model. The comparison signal generator of master integrated circuit, signal comparator and R1, R2, R3, R4 and C1 form temperature control circuit jointly, comparison signal is delivered to differential comparator relatively through R1, R2, R3 respectively, determine the temperature control circuit resistance, determine again environment temperature, further relatively finish function of temperature control with design temperature again, R2, R3 resistance are fixed among the figure, determine the resistance of R1 with them. During the circuit normal operation, output signal is exported high level again after amplifying processing, as fault indication signal.
5. be illustrated in figure 9 as reset circuit of the present utility model. The 5V power supply arranges pin through current-limiting resistance and hand switch and the translation of master integrated circuit and links to each other to finish and reset, manually arrange function.
6. be 12V power supply of the present utility model as shown in figure 10. Alternating current obtains the 12V dc source after transformation, rectification, filtering, C1 is low frequency filtering among the figure, and C2 is High frequency filter. When power supply is normal, working condition indication output high level.
7. be 5V power supply of the present utility model as shown in figure 11. The 12V direct current obtains after 7805 voltage-stablizer voltage stabilizings+the 5V power supply, and C1 is low frequency filtering among the figure, and C2 is High frequency filter. When power supply is normal, working condition indication output high level.
The instructed voltage current-limiting resistance is loaded into and consists of indicator lamp on the light emitting diode.
2. failure diagnosis of air conditioner control circuit
(1) main modular control relation
1. the Current Control relation is such as Fig. 3, and behind the plugged, the 220V alternating current obtains after transformation, rectification, filtering+the 12V direct current, gives the power supplies such as 5V voltage-stablizer, integrated circuit TD62004AP, buzzer and each relay.
The 5V voltage-stablizer obtains+the 12V power supply, and the power supply of voltage stabilizing output+5V is given the power supply of master integrated circuit and remote control circuit.
The power supply of remote control circuit is comprised of the filter circuit that R11 and C8 form. Its input voltage is 5V, and output voltage also is 5V.
2. signal controlling concerns
I. cross low-voltage variation signal controlling relation
Behind the master integrated circuit access 5V dc source, start working, if the 5V supply voltage is excessively low, the Q1 cut-off, the colelctor electrode output low level of Q1, master integrated circuit quits work.
Ii. the remote control circuit signal controlling concerns
After master integrated circuit receives the remote information of remote control circuit, process the level (high level is effective) of the output pin of control master integrated circuit through inner remote information processing module. Concrete control is:
24 pin that heat master integrated circuit are high level
24 pin of refrigeration master integrated circuit are low level
23 pin of high wind speed master integrated circuit are high level; Simultaneously, 22,19 pin are low level
22 pin of middle wind speed master integrated circuit are high level; Simultaneously, 19,23 pin are low level
19 pin of low wind speed master integrated circuit are high level; Simultaneously, 23,22 pin are low level
Whenever receive remote information one time, a high level pulse all can appear in 21 pin.
Iii. the temperature-control circuit signal controlling concerns
After master integrated circuit receives the temperature information of temperature control circuit, process the level (high potential is effective) of the output pin of control master integrated circuit through inner temperature control processing module. Concrete control is:
25 pin of master integrated circuit are high level when heating temperature and being lower than design temperature, otherwise are low level.
25 pin of master integrated circuit were low level when cryogenic temperature was lower than design temperature, otherwise were high level.
Master integrated circuit receives the configuration information of reset circuit, makes 25,24 alternately to be high-low level through inter-process, and concrete the variation is:
25 low 25 high 25 high 25 is low
24 low → 24 are low → and 24 height → 24 are low →
23 low 23 high 23 low 23 is low
(2) fault signature
Following table is for Fig. 3 circuit, adopts malfunctioning module, replaces the standard test module, by indicated number, measure the various signs with the air conditioner fault of observation acquisition.
| Malfunctioning module | Signal designation and measurement | Air conditioner fault characterizes |
| Crystal oscillating circuit | Display is low level among Fig. 6. 26, the 27 pin dead-beat signals output of oscilloscope measurement master integrated circuit. Total voltage table, the indication of 12V voltmeter are normally; | Compressor of air conditioner is not worked; Air conditioner control circuit is not worked; Straighforward operation is failure to actuate; The hand-reset operation is failure to actuate; Buzzer does not ring. |
| The ultralow pressure holding circuit | Master integrated circuit 28 pin are low level. Display is output as low level among Fig. 5. Total voltage table, 12V voltmeter are indicated on the low side; | Compressor of air conditioner is working properly; Air conditioner control circuit is not worked; Straighforward operation is failure to actuate; The hand-reset operation is failure to actuate; Buzzer does not ring. |
| Circuit is accepted in remote control | Display is output as low level among Fig. 7. Oscilloscope measurement master integrated | Straighforward operation is failure to actuate; Buzzer is not sounded a buzzer during straighforward operation. Compressor is working properly after manual starting; Air conditioner control circuit is working properly. |
| Temperature control circuit | Display is output as low level among Fig. 8; The temperature signal output is exported without differential signal among oscillograph detection Fig. 8; Oscillograph detects master integrated circuit 8,10,11 pin pulse-free signals; | Compressor does not turn round or does not shut down. Air-conditioning has cold wind or hot blast to send during running. |
| The master integrated circuit chip | Master integrated circuit 28 pin are high level; Oscillating circuit is normal but detect the dead-beat signal; Normal but the 21 pin pulse-free signals output of remote control circuit; Temperature control circuit is normal but export without the differential comparison signal; 17,19,20,21,22,23,24,25 pin should have output signal in the master integrated circuit under defined terms, but signal output is undesired; 9,12,14 pin are under AD HOC, the no-output level; Index signal is undesired | The fault signature of fault signature and " crystal oscillating circuit " is identical or be in the fault signature of " crystal oscillating circuit " a certain or a few. | |
| The working relay group | The compressor operating relay | Moving together contact can not adhesive. | Compressor does not turn round |
| Moving together contact can not be separated. | Compressor is not shut down | ||
| The four-way electromagnetic valve relay | Moving together contact can not adhesive. | Can not heat | |
| Moving together contact can not be separated. | Can not be converted to refrigeration from heating | ||
| Fan high wind relay | Ammeter 3 has the normal current indication in the control panel; Ammeter 3 is indicated without normal in the control panel, but signal lamp 3 has normal indication. | Fan does not turn under the high wind pattern | |
| Moving together contact can not be separated. Ammeter 3 no currents indication on the control panel, and also no signal indication of signal lamp 3. | Continue high wind, can not change fan mode | ||
| Fan apoplexy relay | Moving together contact can not adhesive. Ammeter 4 on the control panel has the normal current indication; Ammeter 4 is indicated without normal current on the control panel, but signal lamp 4 has the normal signal indication. | Fan does not turn under the apoplexy pattern | |
| Moving together contact can not be separated. Ammeter 4 is without the normal current indication on the control panel, and signal lamp 4 is also indicated without normal signal. | Continue apoplexy, can not be converted to weak wind pattern | ||
| The weak wind relay of fan | Moving together contact can not adhesive. | Fan does not turn under the weak wind pattern | |
| Moving together contact can not be separated. | Continue weak wind, can not be converted to weak wind pattern | ||
The fault signature of actual air-conditioner is compared with it the just module at the actual air conditioner fault of deducibility place, and then the defective device on the determination module.
Adopt above-mentioned standard module, circuit form according to actual air-conditioner connects into experimental circuit at distribution experiment operation platform, replace standard module with malfunctioning module again, find out the relation between malfunctioning module, signal designation and measurement, the air conditioner fault sign three, record becomes as above-mentioned table side by side. According to the fault signature of actual air-conditioner, malfunctioning module, signal designation and the measurement, the air conditioner fault that draw according to above-mentioned experiment characterize the relation between the three, infer the module at actual air conditioner fault place, and then the defective device on the determination module.
Above-described embodiment limits the present invention never in any form, and all formed technical schemes of form of taking to be equal to replacement or equivalence replacement all drop within protection scope of the present invention.
Claims (4)
1, experimental installation for failure diagnosis of air conditioner control circuit, comprise the refrigerating/heating circulatory system and indication control panel, it is characterized in that it also comprises experimental operation table and experiment module, the described refrigerating/heating circulatory system is comprised of compressor, four way solenoid valve, condenser, fan, evaporimeter, capillary and check valve, compressor is connected with four way solenoid valve, four way solenoid valve, condenser, evaporimeter, capillary and check valve are connected in series, and fan places by condenser and the evaporimeter; The control interface of control device, indicating device and the refrigerating/heating circulatory system is installed on the described control panel; Described experimental operation table is provided with the standard test modular jack, and described experiment module is formed in the standard module plug-in unit by the electronic devices and components grafting, and each experiment module cooperatively interacts, and consists of ac control circuit.
2, experimental installation for failure diagnosis of air conditioner control circuit according to claim 1; it is characterized in that the control device on the wherein said control panel comprises refrigeration system high and low pressure side refrigerant pressure dial gauge; earth leakage protective device; main power switch, fuse, main power voltage table; the total working ammeter; working relay coil working ammeter and voltage indicator lamp, master integrated circuit chip operating voltage indicator lamp, control signal input interface.
3, experimental installation for failure diagnosis of air conditioner control circuit according to claim 2 is characterized in that wherein said control signal input interface comprises compressor control signal, fan control signal, reversal valve control signal input interface.
4, experimental installation for failure diagnosis of air conditioner control circuit according to claim 1 is characterized in that wherein said experiment module comprises temperature control circuit module, remote control circuit module, crystal oscillating circuit module, ultralow pressure holding circuit module, reset circuit module, master integrated circuit chip module and signal converter ic chip module; Temperature control circuit module, remote control circuit module, crystal oscillating circuit module, ultralow pressure holding circuit module, reset circuit module and 5V voltage module assign in the standard test modular jack on the operating platform, link to each other with a batter contact of master integrated circuit chip module respectively, another batter contact of master integrated circuit chip module and 12V power supply are connected to the pin contact of signal converter ic chip module one side, and another batter contact of signal converter ic chip module connects respectively compressor of air conditioner operation relay, middle three-way electromagnetic valve relay, fan high wind shelves are used relay with relay coil, weak wind shelves with relay coil, apoplexy shelves coil; Parallel operation voltage indicator lamp on the compressor of air conditioner operation relay, the operating current table of series connection is installed on the panel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2004200548357U CN2788205Y (en) | 2004-12-30 | 2004-12-30 | Air conditioner controlled circuit fault diagnosis testing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2004200548357U CN2788205Y (en) | 2004-12-30 | 2004-12-30 | Air conditioner controlled circuit fault diagnosis testing device |
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| Publication Number | Publication Date |
|---|---|
| CN2788205Y true CN2788205Y (en) | 2006-06-14 |
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| CNU2004200548357U Expired - Lifetime CN2788205Y (en) | 2004-12-30 | 2004-12-30 | Air conditioner controlled circuit fault diagnosis testing device |
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| CN (1) | CN2788205Y (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1330973C (en) * | 2004-12-30 | 2007-08-08 | 南京化工职业技术学院 | Experimental installation for failure diagnosis of air conditioner control circuit |
| CN102608523A (en) * | 2012-03-26 | 2012-07-25 | 宁波奥克斯空调有限公司 | Detection device used for circuit board of air conditioning frequency conversion module |
| CN104501349A (en) * | 2014-11-03 | 2015-04-08 | 宁波奥克斯空调有限公司 | Detection device for frequency conversion air-conditioner controller |
| CN105004983A (en) * | 2015-08-11 | 2015-10-28 | 珠海格力电器股份有限公司 | Capacitance fault detection method, device and system for air conditioning unit |
-
2004
- 2004-12-30 CN CNU2004200548357U patent/CN2788205Y/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1330973C (en) * | 2004-12-30 | 2007-08-08 | 南京化工职业技术学院 | Experimental installation for failure diagnosis of air conditioner control circuit |
| CN102608523A (en) * | 2012-03-26 | 2012-07-25 | 宁波奥克斯空调有限公司 | Detection device used for circuit board of air conditioning frequency conversion module |
| CN104501349A (en) * | 2014-11-03 | 2015-04-08 | 宁波奥克斯空调有限公司 | Detection device for frequency conversion air-conditioner controller |
| CN105004983A (en) * | 2015-08-11 | 2015-10-28 | 珠海格力电器股份有限公司 | Capacitance fault detection method, device and system for air conditioning unit |
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| AV01 | Patent right actively abandoned |
Effective date of abandoning: 20041230 |
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| C25 | Abandonment of patent right or utility model to avoid double patenting |