CN102789230B - Method for automatically detecting air conditioner outdoor unit control panel - Google Patents
Method for automatically detecting air conditioner outdoor unit control panel Download PDFInfo
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- CN102789230B CN102789230B CN201210286154.2A CN201210286154A CN102789230B CN 102789230 B CN102789230 B CN 102789230B CN 201210286154 A CN201210286154 A CN 201210286154A CN 102789230 B CN102789230 B CN 102789230B
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Abstract
The invention discloses a method for automatically detecting an air conditioner outdoor unit control panel, which adopts different detection modes according to different functional circuits on the outdoor unit control panel, and mainly comprises communication circuit detection, direct current fan drive circuit detection, sensor sampling circuit detection, high and low level input circuit detection, weak current drive circuit or relay circuit detection and the like. The special method for automatically detecting the air conditioner outdoor unit control panel provided by the invention not only can prevent the control panel to be detected from being damaged during the detection process, can qualitatively determining and quantitatively detecting all the functional circuits of the control panel to be detected through adopting a mode which combines manual judgment and automatic judgment, but also can detect both two states of 'on' and 'off' of a switching input, so the accuracy of the detection result is improved, and the detection efficiency is also taken into consideration.
Description
Technical field
The invention belongs to air conditioning and refrigeration field of engineering technology, specifically, relate to a kind of method detecting for the off-premises station control panel to air conditioner.
Background technology
Along with warming gradually of terrestrial climate and improving constantly of people's living standard, it is day by day extensive that air-conditioning products has progressively been come into huge numbers of families and usable range.Existing air-conditioning products generally all comprises indoor set and off-premises station two parts, no matter, in indoor set or in off-premises station, is all provided with the control panel for execution unit being coordinated to control.For the Performance Detection of air-conditioning products, can say the most of the time definitive and be the detection that indoor set control panel to air-conditioning products and off-premises station control panel carry out.
At present, the detection method proposing for the off-premises station control panel of air-conditioning products has a variety of, but is all mainly the detection mode that adopts external actual loading, belong to forceful electric power and detect, and testing result mainly relies on artificial judgement, and the probability that therefore produces erroneous judgement is higher.And, in testing process, if misoperation also can produce damage to control panel to be detected, cause thus fault machine to increase, hardware cost raises.In addition, because traditional detection scheme is all the quality that judges control panel by the actual motion state of observation air-conditioning products, this detecting pattern can only be judged whether qualified the making qualitatively of control panel, can not do quantitative detection, therefore, also be exactly really not necessarily certified products even if detect qualified control panel, the accuracy of testing result is existed and queried.
Summary of the invention
The object of the present invention is to provide a kind of automatic testing method of air-conditioner outdoor unit control panel, the damage of not only having avoided testing process to cause control panel to be detected, and improved the accuracy of testing result, take into account detection efficiency.
For solving the problems of the technologies described above, the present invention is achieved by the following technical solutions:
An automatic testing method for air-conditioner outdoor unit control panel, uses different detection meanss for the difference in functionality circuit on off-premises station control panel, comprises
Detection to telecommunication circuit: formulate communication protocol, send and received communication data, whether the data that receive by detection correctly judge that whether telecommunication circuit is normal;
Detection to DC fan driving circuit: external DC fan simulation working plate, to the pulsating wave of simulation working plate transmitted ripple reception simulation working plate feedback, judges that according to the waveform of transmitting-receiving pulsating wave whether DC fan driving circuit is normal;
Detection to senser sampling circuit: utilize fixed resistance replace sensor connect described senser sampling circuit, by the processor on off-premises station control panel read sampled value and with setting value comparison, to judge that whether described senser sampling circuit normal;
Detection to low and high level input class circuit: external toggle switch, whether the position of switching toggle switch, have high and low two kinds of level inputs to judge that whether described low and high level input class circuit is normal by detecting;
Detection to light current class driving circuit or relay class circuit: external pilot lamp, by control pilot lamp light on and off judge described light current class driving circuit or relay class circuit whether normal.
Further, in described automatic testing method, also comprise the detection to functional indicator light circuit: control functional indicator light and light successively, extinguish and move in circles, whether light on request to judge that by overview function pilot lamp whether described functional indicator light circuit is normal.
Further again, in described automatic testing method, also comprise the detection to ac voltage detection circuit: external AC power supply, judge that by receiver voltage value whether described ac voltage detection circuit is normal.
Further, in described automatic testing method, also comprise the detection to lack detection circuit: external AC power supply, judge that by detecting zero cross signal whether described lack detection circuit is normal.
Preferably, described to the testing process of telecommunication circuit in, described telecommunication circuit comprises the telecommunication circuit being connected with indoor set control panel, the telecommunication circuit being connected with driven compressor plate and the telecommunication circuit being connected with computing machine, each telecommunication circuit is intended working plate with internal control template die respectively, driven compressor template die intends working plate and computer simulation working plate connects one to one, transport communication data; The communication data receiving is fed back to off-premises station control panel by each simulation working plate, and described off-premises station control panel compares the feedback data receiving and the communication data previously sending, if unanimously judge, telecommunication circuit is normal.
Preferably; in the described testing process of low and high level being inputted to class circuit; described low and high level input class circuit comprises high tension protection circuit, low-voltage protection circuit, combines inspection detector switch circuit, overheat of compressor holding circuit, refrigerant recovering on-off circuit, outside input circuit and on-off circuit, connects one to one respectively from different toggle switchs.
Preferably, as a kind of preferred detection order of each functional circuit on off-premises station control panel, described off-premises station control panel is entering after self-check program, first read functions list, and the various functions of listing according to feature list is carried out the detection of the functional circuit corresponding with described various functions;
In testing process, carry out successively following steps:
(1) the corresponding level state of default location of telecommunication circuit, DC fan driving circuit, senser sampling circuit, functional indicator light circuit, ac voltage detection circuit, lack detection circuit and low and high level input class circuit is detected automatically, if all normal, carry out subsequent step, otherwise stop testing process, and show corresponding diagnostic trouble code;
(2) drive relay class circuit operation, control the pilot lamp external with relay and circulate and light successively;
(3) controlling the pilot lamp external with light current class driving circuit circulates and lights successively;
(3) display reminding information, notification technique personnel stir the toggle switch mutually external with described low and high level input class circuit successively, if can't detect high and low two kinds of level states, stop testing process, and show corresponding diagnostic trouble code.
Preferably, on also comprising off-premises station control panel in the step (1) of described self-check program, the corresponding level state of default location of original toggle switch carries out the step automatically detecting.
Further, first described off-premises station control panel detects its test interface whether short circuit or its is pressed for multiple function buttons of inquiring about machine operational factor after powering on; If so, enter described self-check program; Otherwise whether short circuit or described multiple function buttons are pressed to detect described test interface in the setting-up time after powering on; If so, enter the special self-check program of toggle switch, for original toggle switch circuit on described off-premises station control panel is detected; If also do not detect in setting-up time, described test interface is pressed by short circuit or described multiple function buttons, enters normal working procedure.
In order to realize the special self-inspection of toggle switch circuit, after described self-check program finishes, control the power-off of off-premises station control panel, switch the position of stirring of original toggle switch on described off-premises station control panel, then to light current on described off-premises station control panel, and in setting-up time the test interface described in short circuit or press described function button, enter the special trace routine of toggle switch, if the level state generation saltus step of described toggle switch circuit output detected, judge that described toggle switch circuit is normal; Otherwise, show diagnostic trouble code.
Compared with prior art, advantage of the present invention and good effect are: the present invention is directed to the damage that automatic testing method that the off-premises station control panel of air conditioner proposes not only can avoid testing process to cause control panel to be detected, and by adopting artificial judgment and automatically judging the mode combining, can carry out qualitative detection and quantitative test to each functional circuit of control panel to be detected, and " opening " and " pass " two states for switch input quantity all can detect, both improve the accuracy of testing result, also taken into account detection efficiency simultaneously.
Read by reference to the accompanying drawings after the detailed description of embodiment of the present invention, it is clearer that the other features and advantages of the invention will become.
Brief description of the drawings
Fig. 1 is the overall architecture schematic diagram of the automatic detection device for air-conditioner outdoor unit control panel is detected;
Fig. 2 A, Fig. 2 B are the program flow diagrams of a kind of embodiment of air-conditioner outdoor unit control panel automatic testing method proposed by the invention.
Embodiment
Below in conjunction with accompanying drawing, the specific embodiment of the present invention is described in detail.
The mode that air-conditioner outdoor unit control panel automatic testing method of the present invention adopts software and hardware to combine, various interface type according to the classification of various functional circuits on off-premises station control panel and processor (describing as an example of the Micro-processor MCV that generally adopts on current air-conditioner outdoor unit control panel example) designs different detection strategies targetedly, and specification in addition, the main circuit detecting has telecommunication circuit, DC fan driving circuit, senser sampling circuit, low and high level input class circuit, relay class circuit, light current class driving circuit, functional indicator light circuit, ac voltage detection circuit, lack detection circuit, key control circuit, charactron driving and display circuit and toggle switch circuit etc.For the detection of various functional circuits, pay the utmost attention to the reliability that uses simulation test working plate and functional test procedures self, avoid testing process to treat detecting off-premises station control panel or air conditioner complete machine causes damage.Adopt for the judgement of testing result the mode that system is judged automatically and artificial subjective judgement combines, pay the utmost attention to the mode that MCU judges automatically, cannot realize automatic judgement, consider to reduce to greatest extent the artificial impact of judging error, reduce the artificial difficulty of judging, to reach the purpose of design that reduces the artificial error in judgement probability of testing result as far as possible.
Wherein, mainly contain to be manually judged to be main functional circuit: relay class circuit, light current class driving circuit, functional indicator light circuit, key control circuit, charactron driving and display circuit etc.
The functional circuit that MCU judges automatically mainly contains: telecommunication circuit, DC fan driving circuit, senser sampling circuit, ac voltage detection circuit, lack detection circuit etc.
Automatically be judged to be master with MCU, but need the artificial functional circuit participating in to mainly contain: low and high level input class circuit, toggle switch circuit etc.
Below by a specific embodiment, elaborate pick-up unit and concrete testing process that the automatic detection for realizing air-conditioner outdoor unit control panel designs.
Embodiment mono-, the present embodiment has the wider scope of application in order to make proposed off-premises station control panel detect strategy, can meet the testing requirement of all kinds air-conditioning products (such as commercial use air conditioner, wall-hanging air conditioner and vertical cabinet-type air conditioner etc.), related functional circuit on the off-premises station control panel of all kinds air conditioner is taken into full account, and proposed different detection meanss for different functional circuits.
Specifically, summarize and be designed with following detection mode:
(1) detection to telecommunication circuit:
For the telecommunication circuit on off-premises station control panel, the present embodiment adopts the mode of formulating in advance communication protocol, utilize off-premises station control panel and external communication class equipment to carry out two-way communication, so according to sending and receiving to communication data whether correctly judge that whether telecommunication circuit normal.
In the present embodiment, described external communication class equipment preferably adopts simulation working plate to connect the telecommunication circuit on off-premises station control panel, to have assisted the detection to telecommunication circuit.
(2) detection to DC fan driving circuit:
For the DC fan driving circuit on off-premises station control panel, the present embodiment adopts the mode of external simulation working plate, utilize off-premises station control panel to simulation working plate transmitted ripple and receive the pulsating wave that simulation working plate feeds back, and then judging that according to the waveform of the pulsating wave receiving and send whether described DC fan driving circuit is normal.
(3) detection to senser sampling circuit:
For the senser sampling circuit on off-premises station control panel, the present embodiment adopts the mode of external fixed resistance, utilize fixed resistance to replace sensor to connect described senser sampling circuit, and then by the sampled value of the MCU read sensor sample circuit on off-premises station control panel, then compare with the setting value of prior preservation, whether normally judge thus described senser sampling circuit.
(4) detection to low and high level input class circuit:
For the low and high level input class circuit on off-premises station control panel, the present embodiment adopts the mode of external toggle switch, by switching the position of toggle switch, and detect the level that is input to MCU and whether comprise high level and low level two states, judge that whether described low and high level input class circuit is normal.
(5) detection to relay class circuit:
For the relay class circuit on off-premises station control panel, for example connect the relay of AC blower fan, relay, A.C. contactor, heat tape pilot relay, outside output control relay and other relays of connection valve class, the present embodiment adopts the mode of external pilot lamp, lights and extinguishes to judge that whether described relay class circuit is normal by controlling pilot lamp.
(6) detection to electronic expansion valve-driving circuit and other light current class driving circuits:
Require weak electrically driven (operated) circuit for the electronic expansion valve-driving circuit on off-premises station control panel and other, the present embodiment also preferably adopts the mode of external pilot lamp, lights successively and extinguishes to judge that whether such circuit is normal by controlling pilot lamp.
(7) detection to functional indicator light circuit:
For the functional indicator light circuit on off-premises station control panel, without external any auxiliary detection circuit, only need to control each functional indicator light this control procedure of lighting successively, extinguish and move in circles, and then whether light on request by overview function pilot lamp, whether normally can judge described functional indicator light circuit.
(8) detection to ac voltage detection circuit:
For the ac voltage detection circuit on off-premises station control panel, adopt the mode of external AC power supply, describe as an example of the AC power of external 220V example, read the magnitude of voltage of ac voltage detection circuit sampling output by the MCU on off-premises station control panel, and then convert the magnitude of voltage of AC power to and compare with the setting value of preserving in advance, if equal 220V, judge that described ac voltage detection circuit is normal; Otherwise, judge described ac voltage detection circuit fault.In the present embodiment, change the error range of the magnitude of voltage permission ± 5% of the AC power generating by MCU.
(9) detection to lack detection circuit:
For the V on off-premises station control panel, W lack detection circuit, can adopt the mode of external AC power supply, describe as an example of the AC power of external 220V example, receive zero cross signal by the MCU on off-premises station control panel, if can receive continuously N zero cross signal (preferably N=20), automatically judge that described lack detection circuit is normal.
(10) detection to key control circuit:
For the key control circuit on off-premises station control panel, can adopt the mode that starts the trace routine of each functional circuit on control panel on off-premises station control panel for inquiring about function button KEY1, KEY2, the KEY3 of machine operational factor by pressing, whether start operation by observing trace routine, complete in the lump the detection to key control circuit.
(11) detection of the driving of logarithmic code pipe and display circuit:
Drive and display circuit for the charactron on off-premises station control panel, can adopt the mode of output diagnostic trouble code or information, when other functional circuits are detected, complete in the lump the detection to described charactron driving and display circuit by observing the testing result of charactron output.
In conjunction with above-mentioned detection strategy, first the present embodiment designs a kind of automatic detection device for off-premises station control panel, for the detection of each functional circuit on off-premises station control panel provides hardware supported.
Shown in Figure 1, the automatic detection device for air-conditioner outdoor unit control panel that the present embodiment proposes mainly comprises simulation working plate, fixed resistance R1, R2, toggle switch K1-K7, pilot lamp D1-D3 and stable AC power (the present embodiment describes as an example of the AC power of 220V example).Wherein, described simulation working plate comprises simulation working plate for connecting telecommunication circuit and simulation working plate for being connected DC fan driving circuit.For the telecommunication circuit on off-premises station control panel, specifically comprise the telecommunication circuit for being connected with indoor set control panel, the telecommunication circuit being connected with driven compressor plate and the telecommunication circuit being connected with computing machine, each telecommunication circuit is intended working plate with internal control template die respectively, driven compressor template die intends working plate and computer simulation working plate connects one to one, transport communication data.In the process detecting in the each several part telecommunication circuit on off-premises station control panel, first control each several part telecommunication circuit to the simulation working plate output communication data external with it by the MCU on control panel, simulation working plate is receiving after communication data, and described communication data former state is fed back to off-premises station control panel.MCU on off-premises station control panel compares the feedback data receiving and its communication data previously having sent, if consistent, judges that telecommunication circuit is normal, otherwise, judge that telecommunication circuit is abnormal.For the detection order of each several part telecommunication circuit, the present embodiment does not do requirement.
For the DC fan driving circuit on off-premises station control panel, be connected with DC fan simulation working plate, mutual transmission pulse ripple.In the testing process of the present embodiment, first the MCU on off-premises station control panel drives DC fan driving circuit to set the PWM pulsating wave of dutycycle, the pwm pulse ripple that for example dutycycle is 25% to connected simulation working plate output.When described DC fan simulation working plate receives after the pwm pulse ripple that off-premises station control panel sends, the pulsating wave former state receiving is fed back to off-premises station control panel.MCU on described off-premises station control panel is receiving after the pulsating wave of simulation working plate feedback, the pulsating wave sending by the feedback pulse ripple receiving and before it compares, if waveform is consistent, the pwm pulse ripple that is also 25% for dutycycle, judge that DC fan driving circuit is normal, otherwise, judge described DC fan driving circuit fault.
Consider and in current air-conditioner outdoor unit, be generally all provided with temperature sensor and pressure transducer, the pressure that is respectively used to inlet temperature, middle part temperature, outlet temperature, delivery temperature, suction temperature and outdoor environment temperature and the compressor of heat exchanger detects.For the temperature sensor sampling circuit on off-premises station control panel and pressure transducer sample circuit detect, the present embodiment adopts the fixed resistance of the 10K Ω that for example precision of resistor R1, R2(of fixed resistance value is 1%) replace respectively temperature sensor and pressure transducer, connect one to one with temperature sensor sampling circuit and pressure transducer sample circuit on off-premises station control panel.Thus one, the voltage sample value that the MCU on off-premises station control panel collects by temperature sensor sampling circuit and pressure transducer sample circuit is exactly a fixed value.Due to the corresponding temperature value of this fixed value and force value can calculated in advance out, be kept in MCU, therefore after start detection program, MCU only need compare temperature value and the force value of the corresponding temperature value of voltage sample value collecting and force value and preservation in advance respectively, if consistent, just can judge that temperature sensor sampling circuit and pressure transducer sample circuit on off-premises station control panel are normal, otherwise, judge described temperature sensor sampling circuit and pressure transducer sample circuit fault.For the detection order of two parts sample circuit, the present embodiment does not do requirement.
For the toggle switch K1-K7 in automatic detection device, for being connected with the low and high level input class circuit on off-premises station control panel, by stirring the position of toggle switch K1-K7, and in conjunction with the low and high level state detecting, comprehensively complete the detection to low and high level input class circuit.In the present embodiment; described low and high level input class circuit specifically comprises high tension protection circuit, low-voltage protection circuit, combines the on-off circuit of examining detector switch circuit, overheat of compressor holding circuit, refrigerant recovering on-off circuit, outside input circuit and the flat signal of other requirement input height, connects one to one respectively from different toggle switch K1-K7.Before detection starts, first each toggle switch K1-K7 is toggled it to default location, the corresponding level state of this default location is known, for example, each toggle switch K1-K7 is toggled it to the position ON of acquiescence, and ON corresponding level state in position is high.After detection starts, first MCU on off-premises station control panel detects whether its level state that connects each input interface of low and high level input class circuit is high, and the low and high level that level state connects for low input interface is inputted class circuit can directly be judged to be fault; The low and high level that level state connects for high input interface is inputted class circuit needs and further connected toggle switch is toggled it to after the OFF of position, if MCU receives low level, could judge that this road low and high level input class circuit is normal, otherwise, judge equally this road low and high level input class fault.
For the pilot lamp D1-D3 in automatic detection device, for off-premises station control panel on light current class driving circuit and relay class circuit (for example heavy-current relay output class circuit) connect one to one.Wherein, in described light current class driving circuit, specifically comprise electronic expansion valve-driving circuit, outside output circuit and other light current class driving circuits, connect one to one from different light current pilot lamp respectively.In described heavy-current relay output class circuit, specifically comprise relay circuit for controlling AC blower fan, for controlling relay circuit, A.C. contactor, heat tape pilot relay, outside output control relay and other forceful electric power class relay circuits of the valve classes such as four-way valve, by-pass valve, coolant injection valve, reserving valve, connect one to one from different forceful electric power pilot lamp respectively.After detection starts, by driving each road pilot lamp to circulate and light successively, whether such circuit of artificial judgment is normal.
For the 220V AC power in automatic detection device, respectively with ac voltage detection circuit and the corresponding connection of lack detection circuit on off-premises station control panel.After detection starts, by detecting whether the ac voltage generating after sample conversion is 220V, judge that whether described ac voltage detection circuit is normal; Whether there are multiple continuous zero cross signals received by detecting, judge that whether described lack detection circuit is normal.
For the testing result of various functional circuits, can show by charactron driving and display circuit on off-premises station control panel; Also can adopt the mode of intending arranging in working plate charactron circuit at internal control template die, receive the demonstration information that on off-premises station control panel, MCU generates according to testing result, and then the charactron of intending on working plate by internal control template die shows diagnostic trouble code, with location abort situation or display reminding information, and then guidance technology personnel carry out follow-up testing process.
Off-premises station control panel to be detected is installed in above-mentioned automatic detection device, just can starts the self-check program in MCU, complete the automatic detection to each functional circuit on off-premises station control panel.
In the present embodiment, described self-inspection scheme can be carried out in two steps: the first step is carried out comprehensive self-inspection, and second step carries out the special self-inspection of toggle switch.Here, the special self-inspection of described toggle switch is that existing toggle switch circuit on air-conditioner outdoor unit control panel is carried out to the special process detecting.
For control system enters different trace routines, the present embodiment preferably adopts to the test interface TEST on air-conditioner outdoor unit control panel is carried out short circuit or press at times KEY1, KEY2 described in function button KEY1, KEY2, KEY3(, KEY3 being respectively on off-premises station control panel for inquiring about the function button of machine operational factor at times) mode realized.As a kind of preferred design, the mode control system that the present embodiment preferably adopts before control panel powers on short circuit TEST mouth or presses function button KEY1, KEY2, KEY3 enters comprehensive self-check program; And the mode control system that adopts (in 30 seconds) short circuit TEST mouth in setting-up time after control panel powers on or press function button KEY1, KEY2, KEY3 enters the special self-check program of toggle switch circuit.If do not detect in the setting-up time of control panel after powering on, TEST mouth is pressed by short circuit or function button KEY1, KEY2, KEY3, enters normal working procedure.
The design cycle of the special self-check program below in conjunction with Fig. 2 A, Fig. 2 B to described comprehensive self-check program and toggle switch circuit is described in detail.
As shown in Figure 2 A and 2 B, specifically comprise the following steps:
S201, before off-premises station control panel is powered on, first by the test interface TEST short circuit on control panel or function button KEY1, KEY2, KEY3 are pressed; Then, to the logical forceful electric power of off-premises station control panel, utilizing the power circuit on control panel to convert the forceful electric power of input on the control panel required working power of each load, is each electricity consumption load supplying.
MCU on S202, off-premises station control panel is powering on after operation, whether whether first detect TEST mouth is pressed by short circuit or function button KEY1, KEY2, KEY3, if TEST mouth is pressed by short circuit or function button KEY1, KEY2, KEY3, the comprehensive self-check program of operation automatically; Otherwise, jump to step S213.
S203, MCU, starting after comprehensive self-check program, first carry out initialization to program, read the feature list in EEPROM, to determine, which functional circuit on control panel are detected.
Here; the function difference of supporting due to the air conditioner of different type of machines; therefore; functional circuit on its off-premises station control panel is also not quite similar; the air conditioner type for example having is with lack detection circuit and high-low pressure holding circuit, and some types are not with, read functions list before process of self-test formally starts; can only the functional circuit truly having on off-premises station control panel be detected by guidance system, to ensure the accuracy of testing result.
In the present embodiment, first described MCU accesses EEPROM, and read functions list, if reading out data mistake does not for example read correct data in setting-up time, is judged EEPROM fault, stops testing process, and reports an error.If reading out data is normal, carry out subsequent operation.
S204, automatically start the detection voluntarily to functional indicator light driving circuit, telecommunication circuit, DC fan driving circuit, senser sampling circuit, ac voltage detection circuit, lack detection circuit, and the detection of the level state of the default location of original toggle switch circuit on the level state of default location to low and high level input class circuit and control panel.
In the present embodiment, the detection of functional indicator light driving circuit is adopted and drives successively in order each road pilot lamp to light then to extinguish for 1 second, and move in circles successively, until control panel power-off or exit trace routine.Whether normal for functional indicator light driving circuit, need the each road of manual observation pilot lamp whether to be judged according to both definite sequence successively light on and off.
To the detection of telecommunication circuit on control panel, comprise the telecommunication circuit for being connected with indoor set control panel, the telecommunication circuit being connected with driven compressor plate and the detection of the telecommunication circuit that is connected with computing machine.MCU sends specific communication data according to the communication protocol of formulating in advance, and waits for the communication data that receives external simulation working plate feedback.If data have to have back, and the feedback data receiving is identical with the communication data sending, and thinks that telecommunication circuit is normal, drives the charactron on off-premises station control panel or intends the charactron demonstration " 0 " on working plate by internal control template die; Otherwise, think and drive telecommunication circuit fault charactron to show diagnostic trouble code, and stop testing process.In this process, by observing the demonstration situation of charactron on off-premises station control panel, can complete in the lump the charactron driving on off-premises station control panel and the detection of display circuit.
To the detection of DC fan driving circuit on control panel, MCU adopts the pwm pulse ripple of the certain dutycycle of output, and receive the mode of the pwm pulse ripple of DC fan simulation working plate feedback, whether judge that by the consistance of detection waveform whether such circuit is normal.As a kind of preferred design of the present embodiment, the pwm pulse ripple that MCU output duty cycle is 25%, then waits for the pulsating wave that receives DC fan simulation working plate feedback.If pulse signal has to have back, and be also 25% by the dutycycle that DC fan is simulated the pwm pulse ripple of working plate feedback, judge that DC fan driving circuit is normal, drive charactron to show " 0 "; Otherwise, judge DC fan driving circuit fault, drive charactron to show diagnostic trouble code, and stop testing process.
To the detection of control panel upper sensor sample circuit, comprise the detection to temperature sensor sampling circuit and the detection to pressure transducer sample circuit.MCU utilizes its A/D interface to receive the voltage sample value of each sample circuit output, and convert corresponding with it temperature value or force value to, compare with the setting value of preserving in advance, if consistent, determine sensor sample circuit is normal, drives charactron to show " 0 "; In the present embodiment, temperature value permissible error is ± 2 DEG C, and force value permissible error is ± 0.2MPa.Otherwise determine sensor sample circuit fault, drives charactron to show corresponding diagnostic trouble code, and stops testing process.
To the detection of ac voltage detection circuit on control panel, MCU receives the magnitude of voltage of ac voltage detection circuit sampling output, this magnitude of voltage is the DC voltage value that 220V alternating voltage generates via ac voltage detection circuit conversion, MCU utilizes its inner reverse transformation algorithm can indirectly converse according to the DC voltage value receiving the voltage magnitude of the AC power of input, if equal 220V, think that described ac voltage detection circuit is normal, drive charactron to show " 0 "; Otherwise, judge ac voltage detection circuit fault, drive charactron to show diagnostic trouble code, and stop testing process.
To the detection of lack detection circuit on control panel, MCU receives the zero cross signal of lack detection circuit output, if can receive 20 continuous zero cross signals (can certainly be set as multiple zero cross signals of other numbers), lack detection circuit no problem described in thinking, drives charactron to show " 0 "; Otherwise, judge lack detection circuit fault (because the AC power of external described lack detection circuit is the normal 220V AC power of selecting, so can there is not phase shortage problem), drive charactron to show corresponding diagnostic trouble code, and stop testing process.
To the detection of the acquiescence level state of low and high level input class circuit on control panel, the detection that comprises high tension protection circuit, low-voltage protection circuit, combines inspection detector switch circuit, overheat of compressor holding circuit, refrigerant recovering on-off circuit, outside input circuit and other and require the on-off circuit of input high level signal.MCU acquiescence receives high level signal, and the default location of toggle switch is ON.Whether the magnitude of voltage that the input interface of MCU automatic decision Qi Ge road connection low and high level input class circuit receives is high level, if so, thinks and drives charactron to show " 0 " by low and high level input class circuit no problem; Otherwise, judge low and high level input class fault, drive charactron to show corresponding diagnostic trouble code, and stop testing process.In this testing process, likely because technician does not in advance toggle it to default location ON by toggle switch to cause, be not the problem of low and high level input class circuit itself.In order to address this problem, MCU is in driving charactron to show diagnostic trouble code, the level state that continues it to receive low level input interface detects, if become high level (being that toggle switch is toggled it to correct default location ON by technician), think that fault disappears, continue to carry out follow-up detecting step.
The detection of the acquiescence level state to original toggle switch circuit on control panel, adopt the detection mode as above-mentioned low and high level input class circuit,, before trace routine starts, first technician need to toggle it to default location by toggle switch, for example position OFF, i.e. open circuit.After trace routine starts, whether the level state that MCU detects its interface that connects described toggle switch circuit is high, if high, think and drives charactron to show " 0 " by described toggle switch circuit no problem; Otherwise, judge described toggle switch fault, drive charactron to show corresponding diagnostic trouble code, and stop testing process.
S205, MCU are after formal testing process starts, postpone setting-up time, for example, after 6 seconds, judge that non-fault occurs, drive charactron display reminding information, such as rear three demonstrations " 000 " at charactron, normal with the above-mentioned detection of notification technique personnel, start the detection of follow-up heavy-current relay output class circuit.
S206, charactron showed after " 000 " two seconds (can certainly be set as other times), automatically started the detection of heavy-current relay output class circuit.
In the present embodiment, described heavy-current relay output class circuit comprises relay circuit for controlling two AC blower fans, for operation valve class relay circuit, A.C. contactor, heat tape pilot relay, outside output control relay and other forceful electric power class relay circuits of (comprising four-way valve, by-pass valve, coolant injection valve and reserving valve etc.), a corresponding n heavy-current relay.MCU is by driving n heavy-current relay on control panel to move successively, and then control external n forceful electric power pilot lamp corresponding to a described n heavy-current relay (preferably adopting forceful electric power LED lamp) circulates and lights successively, by the situation of lighting of manual observation pilot lamp, artificially judge that whether described heavy-current relay output class circuit is normal.
The circulation of described pilot lamp is lighted process and can be continued to carry out always, until control panel power-off or exit trace routine.
S207, postponing after a period of time, for example, postponing after 2n second, MCU starts the detection to light current class driving circuit automatically.
In the present embodiment, described light current class driving circuit comprises electronic expansion valve-driving circuit and other light current class driving circuits, m the light current interface that corresponding MCU controls.MCU is by driving successively the level of m light current interface on control panel, and then control circulates and lights successively with described m the corresponding external m of a light current interface light current pilot lamp (preferably adopting light current LED lamp), by the situation of lighting of manual observation pilot lamp, artificially judge that whether described light current class driving circuit is normal.
The circulation of described pilot lamp is lighted process and can be continued to carry out always, until control panel power-off or exit trace routine.
S208, postponing after a period of time, for example postpone after the cycle period of a light current LED lamp (suppose a light current LED lamp light 1 second, extinguish 1 second, a cycle period is 2m second), MCU drives charactron display reminding information, for example, in rear three demonstrations " 999 " of charactron, start to carry out the detection of low and high level input class circuit with notification technique personnel.
S209, technician are seeing that charactron shows after " 999 ", and the toggle switch that connects described low and high level input class circuit is toggled it to the position contrary with default location, for example OFF position.Now, if MCU detects low level, drive charactron to show diagnostic trouble code; Then toggle switch is pulled back to default location again, for example ON position, if MCU detects high level, controls charactron and removes diagnostic trouble code.Successively to external high tension protection circuit, low-voltage protection circuit, combine inspection detector switch circuit, overheat of compressor holding circuit, refrigerant recovering on-off circuit, outside input circuit requires the toggle switch K1-K7 of the on-off circuit of input high level signal to carry out after two-way stirring with other, if each road of MCU all detects height for the input interface that connects low and high level input class circuit, low two kinds of level states, without considering detection order, think that the low and high level input class circuit that Yu Gai road input interface is connected is normal, otherwise, charactron shows corresponding diagnostic trouble code, and stop testing process.
S210, detection finish, and MCU drives charactron display reminding information, and for example, in rear three demonstrations " 886 " of charactron, with notification technique, personnel detect end.
S211, technician seeing that charactron shows after " 886 ", can judge that comprehensive self-check program finishes, and then control the power-off of off-premises station control panel, prepare to enter the special self-check program of toggle switch circuit.
Original toggle switch on off-premises station control panel is all toggled it to the position contrary with default location by S212, technician, for example ON position, then to the logical light current of off-premises station control panel, only give MCU and toggle switch circuit supply, and in setting-up time (for example, in 30 seconds) by the TEST mouth short circuit on off-premises station control panel or function button KEY1, KEY2, KEY3 are pressed.
S213, MCU detect in 30 seconds after powering on that TEST mouth is pressed by short circuit or function button KEY1, KEY2, KEY3, enters the special self-check program of toggle switch circuit automatically.If MCU does not detect yet TEST mouth and is pressed by short circuit or function button KEY1, KEY2, KEY3, exits the special self-check program of toggle switch circuit in 30 seconds after powering on.
S214, MCU connect toggle switch circuit Ge road input interface to it and detect, if low level (i.e. the level contrary with the corresponding level state of default location) all detected, judge that described toggle switch circuit is normal, drive charactron display reminding information, for example, in rear three demonstrations " 888 " of charactron, finish with the special self-check program of notification technique personnel toggle switch circuit; Otherwise, drive charactron to show corresponding diagnostic trouble code.If there are multiple faults, each diagnostic trouble code shows 2 seconds, and the demonstration that circulates.
S215, special self-check program finish.
In the present embodiment, show for the fault of off-premises station control panel, latter three of regulation charactron is diagnostic trouble code demonstration position.If diagnostic trouble code is only units, only show last position; If diagnostic trouble code is double figures, only show last two.Intend working plate for sending preferably of fault content by off-premises station control panel notice internal control template die to be detected, but specifically on charactron, show and why hinder digital content, the processor that can be intended on working plate by internal control template die carries out conversion process realization.
As the protection to above-mentioned self-check program, the present embodiment proposes following protection strategy:
1, the protection of self-check program comprehensively
(1) be no more than 5 minutes the working time of self-check program comprehensively, otherwise exit voluntarily, while exiting, all diagnostic trouble code must be removed; And
If a) in power-up state, time is up and exit, and enters deadlock state after exiting self-check program;
B) if power-off is exited, press off-position processing;
(2) can only enter once self-check program comprehensively after powering at every turn, if need to again enter, must re-power.
2, the protection of the special self-check program of toggle switch circuit
(1) be no more than 1 minute the working time of the special self-check program of toggle switch circuit (timing from TEST mouth short circuit or function button KEY1, KEY2, KEY3 are pressed), otherwise exit voluntarily, while exiting, all diagnostic trouble code must be removed; And
If a) in power-up state, time is up and exit, and enters deadlock state after exiting self-check program;
B) if power-off is exited, press off-position processing;
(2) can only enter the special self-check program of a toggle switch circuit after powering at every turn, if need to again enter, must re-power.
The present invention is by adopting above-mentioned detection scheme, can realize to various types of air-conditioner outdoor unit control panels the detection of quantitative and qualitative analysis, testing result more precisely, reliably, detects operation more simple, directly perceived, and the off-premises station control panel after detection also more has quality assurance.
Certainly; the above is only a kind of preferred implementation of the present invention; it should be noted that; for those skilled in the art; under the premise without departing from the principles of the invention; can also make some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.
Claims (10)
1. an automatic testing method for air-conditioner outdoor unit control panel, uses different detection meanss for the difference in functionality circuit on off-premises station control panel, comprising:
Detection to telecommunication circuit: formulate communication protocol, send and received communication data, whether the data that receive by detection correctly judge that whether telecommunication circuit is normal;
Detection to senser sampling circuit: utilize fixed resistance replace sensor connect described senser sampling circuit, by the processor on off-premises station control panel read sampled value and with setting value comparison, to judge that whether described senser sampling circuit normal;
Detection to light current class driving circuit or relay class circuit: external pilot lamp, by control pilot lamp light on and off judge described light current class driving circuit or relay class circuit whether normal;
It is characterized in that: also comprise
Detection to DC fan driving circuit: external DC fan simulation working plate, to the pulsating wave of simulation working plate transmitted ripple reception simulation working plate feedback, judges that according to the waveform of transmitting-receiving pulsating wave whether DC fan driving circuit is normal; When described DC fan simulation working plate receives after the pulsating wave that off-premises station control panel sends, the pulsating wave former state receiving is fed back to off-premises station control panel; Processor on described off-premises station control panel is receiving after the pulsating wave of simulation working plate feedback, the pulsating wave sending by the feedback pulse ripple receiving and before it compares, if waveform is consistent, judge that DC fan driving circuit is normal, otherwise, judge described DC fan driving circuit fault;
Detection to low and high level input class circuit: external toggle switch, whether the position of switching toggle switch, have high and low two kinds of level inputs to judge that whether described low and high level input class circuit is normal by detecting; Processor acquiescence receives high level signal, it is the default location of toggle switch, processor automatic decision Qi Ge road connects whether the magnitude of voltage that the input interface of low and high level input class circuit receives is high level, if so, thinks low and high level input class circuit no problem; Otherwise, judge low and high level input class fault, drive charactron to show corresponding diagnostic trouble code, and stop testing process; Processor is in driving charactron to show diagnostic trouble code, and the level state that continues it to receive low level input interface detects, if become high level, thinks that fault disappears, and continues to carry out follow-up detecting step;
Detection to key control circuit: adopt by pressing the mode that starts the trace routine of each functional circuit on control panel on off-premises station control panel for inquiring about the function button of machine operational factor, whether start operation by observing trace routine, complete in the lump the detection to key control circuit;
The detection of the driving of logarithmic code pipe and display circuit: the mode that adopts output diagnostic trouble code or information, when other functional circuits are detected, complete in the lump the detection to described charactron driving and display circuit by observing the testing result of charactron output.
2. the automatic testing method of air-conditioner outdoor unit control panel according to claim 1, it is characterized in that: also comprise the detection to functional indicator light circuit: control functional indicator light and light successively, extinguish and move in circles, whether light on request to judge that by overview function pilot lamp whether described functional indicator light circuit is normal.
3. the automatic testing method of air-conditioner outdoor unit control panel according to claim 2, is characterized in that: also comprise the detection to ac voltage detection circuit: external AC power supply, judge that by receiver voltage value whether described ac voltage detection circuit is normal.
4. the automatic testing method of air-conditioner outdoor unit control panel according to claim 3, is characterized in that: also comprise the detection to lack detection circuit: external AC power supply, judge that by detecting zero cross signal whether described lack detection circuit is normal.
5. the automatic testing method of air-conditioner outdoor unit control panel according to claim 1, it is characterized in that: described to the testing process of telecommunication circuit in, described telecommunication circuit comprises the telecommunication circuit being connected with indoor set control panel, the telecommunication circuit being connected with driven compressor plate and the telecommunication circuit being connected with computing machine, each telecommunication circuit is intended working plate with internal control template die respectively, driven compressor template die intends working plate and computer simulation working plate connects one to one, transport communication data; The communication data receiving is fed back to off-premises station control panel by each simulation working plate, and described off-premises station control panel compares the feedback data receiving and the communication data previously sending, if unanimously judge, telecommunication circuit is normal.
6. the automatic testing method of air-conditioner outdoor unit control panel according to claim 1; it is characterized in that: in the described testing process of low and high level being inputted to class circuit; described low and high level input class circuit comprises high tension protection circuit, low-voltage protection circuit, combines inspection detector switch circuit, overheat of compressor holding circuit, refrigerant recovering on-off circuit, outside input circuit and on-off circuit, connects one to one respectively from different toggle switchs.
7. according to the automatic testing method of the air-conditioner outdoor unit control panel described in any one in claim 4 to 6, it is characterized in that: described off-premises station control panel is entering after self-check program, first read functions list, the various functions of listing according to feature list is carried out the detection of the functional circuit corresponding with described various functions;
In testing process, carry out successively following steps:
(1) the corresponding level state of default location of telecommunication circuit, DC fan driving circuit, senser sampling circuit, functional indicator light circuit, ac voltage detection circuit, lack detection circuit and low and high level input class circuit is detected automatically, if all normal, carry out subsequent step, otherwise stop testing process, and show corresponding diagnostic trouble code;
(2) drive relay class circuit operation, control the pilot lamp external with relay and circulate and light successively;
(3) controlling the pilot lamp external with light current class driving circuit circulates and lights successively;
(3) display reminding information, notification technique personnel stir the toggle switch mutually external with described low and high level input class circuit successively, if can't detect high and low two kinds of level states, stop testing process, and show corresponding diagnostic trouble code.
8. the automatic testing method of air-conditioner outdoor unit control panel according to claim 7, is characterized in that: on also comprising off-premises station control panel in the step (1) of described self-check program, the corresponding level state of default location of original toggle switch carries out the step automatically detecting.
9. the automatic testing method of air-conditioner outdoor unit control panel according to claim 8, is characterized in that: first described off-premises station control panel detects its test interface after powering on, and whether short circuit or its are pressed for multiple function buttons of inquiring about machine operational factor; If so, enter described self-check program; Otherwise whether short circuit or described multiple function buttons are pressed to detect described test interface in the setting-up time after powering on; If so, enter the special self-check program of toggle switch, for original toggle switch circuit on described off-premises station control panel is detected; If also do not detect in setting-up time, described test interface is pressed by short circuit or described multiple function buttons, enters normal working procedure.
10. the automatic testing method of air-conditioner outdoor unit control panel according to claim 9, it is characterized in that: after described self-check program finishes, control the power-off of off-premises station control panel, switch the position of stirring of original toggle switch on described off-premises station control panel, then to light current on described off-premises station control panel, and in setting-up time the test interface described in short circuit or press described function button, enter the special trace routine of toggle switch, if the level state generation saltus step of described toggle switch circuit output detected, judge that described toggle switch circuit is normal; Otherwise, show diagnostic trouble code.
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| CN201210286154.2A CN102789230B (en) | 2012-08-13 | 2012-08-13 | Method for automatically detecting air conditioner outdoor unit control panel |
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| CN103837820B (en) * | 2012-11-27 | 2016-07-06 | 广东美的制冷设备有限公司 | The communication detecting method of a kind of current-loop communication circuit and system |
| CN104807129B (en) * | 2014-01-23 | 2017-08-25 | 广东美的制冷设备有限公司 | The control method of air conditioner |
| CN103982453B (en) * | 2014-05-28 | 2016-06-29 | 浪潮电子信息产业股份有限公司 | Online detection method for fan control panel |
| CN104020760A (en) * | 2014-06-11 | 2014-09-03 | 嘉善天慧光电科技有限公司 | Method for detecting electrical performance of control panel of water heater |
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