CN102789230A - Method for automatically detecting air conditioner outdoor unit control panel - Google Patents

Method for automatically detecting air conditioner outdoor unit control panel Download PDF

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Publication number
CN102789230A
CN102789230A CN2012102861542A CN201210286154A CN102789230A CN 102789230 A CN102789230 A CN 102789230A CN 2012102861542 A CN2012102861542 A CN 2012102861542A CN 201210286154 A CN201210286154 A CN 201210286154A CN 102789230 A CN102789230 A CN 102789230A
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China
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circuit
control panel
detection
premises station
normal
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CN2012102861542A
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Chinese (zh)
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CN102789230B (en
Inventor
牛建勇
陈建兵
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海信(山东)空调有限公司
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Priority to CN201210286154.2A priority Critical patent/CN102789230B/en
Publication of CN102789230A publication Critical patent/CN102789230A/en
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Publication of CN102789230B publication Critical patent/CN102789230B/en

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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

The automatic testing method of air-conditioner outdoor unit control panel

Technical field

The invention belongs to air-conditioning and Refrigeration Engineering technical field, specifically, relate to the method that a kind of off-premises station control panel that is used for air conditioner detects.

Background technology

Along with warming gradually of terrestrial climate and improving constantly of people's living standard, it is day by day extensive that the air-conditioning product has progressively been come into huge numbers of families and usable range.Existing air-conditioning product generally all comprises indoor set and off-premises station two parts, no matter in indoor set still in the off-premises station, all is provided with and is used for control panel that execution unit is coordinated to control.Detect for the air-conditioning performance of products, we can say that the overwhelming majority times are detections that indoor set control panel and off-premises station control panel to the air-conditioning product are carried out.

At present, the detection method that is proposed to the off-premises station control panel of air-conditioning product has a variety of, but all is the detection mode that adopts external actual loading mainly, belong to forceful electric power and detect, and testing result mainly relies on and artificially judges that the probability that therefore produces erroneous judgement is higher.And, in testing process,, cause the fault machine to increase thus if misoperation also can produce damage to control panel to be detected, hardware cost raises.In addition; Because traditional detection scheme all is a quality of judging control panel through the actual motion state of observing the air-conditioning product; This detecting pattern can only be judged whether qualified the making qualitatively of control panel, can not do quantitative detection, therefore; Even if detect qualified control panel also not necessarily really is exactly certified products, and the accuracy existence of testing result is 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 that control panel to be detected is caused, and improved the accuracy of testing result, taken into account detection efficiency.

For solving the problems of the technologies described above, the present invention adopts following technical scheme to be achieved:

A kind of automatic testing method of air-conditioner outdoor unit control panel uses the different detection means to the difference in functionality circuit on the off-premises station control panel, comprises

Detection to telecommunication circuit: formulate communication protocol, send and the received communication data, whether judge correctly through the data that detection receives whether telecommunication circuit is normal;

Detection to the dc fan driving circuit: external dc fan simulation frock plate, send the pulsating wave of pulsating wave and reception simulation frock plate feedback to simulation frock plate, judge according to the waveform of transmitting-receiving pulsating wave whether the dc fan driving circuit is normal;

Detection to senser sampling circuit: utilize fixed resistance to replace sensor to connect said senser sampling circuit, through the processor on the off-premises station control panel read sampled value and with setting value relatively, whether normal to judge said senser sampling circuit;

Detection to high-low level input type circuit: external toggle switch, whether the position of switching toggle switch has high and low two kinds of level inputs to judge whether said high-low level input type circuit is normal through detecting;

Detection to light current class driving circuit or relay class circuit: external pilot lamp, judge through control pilot lamp light on and off whether said light current class driving circuit or relay class circuit be normal.

Further; Whether in described automatic testing method, also comprise the detection to the functional indicator light circuit: the control function pilot lamp is lighted successively, is extinguished and moves in circles, light on request through the overview function pilot lamp and judge whether said functional indicator light circuit is normal.

Further again, in described automatic testing method, also comprise detection to ac voltage detection circuit: external AC power supply, judge through receiving magnitude of voltage whether said ac voltage detection circuit is normal.

Further again, in described automatic testing method, also comprise detection to lack detection circuit: external AC power supply, judge through detecting zero cross signal whether said lack detection circuit is normal.

Preferably; In said testing process to telecommunication circuit; Said telecommunication circuit comprises the telecommunication circuit that is connected with the indoor set control panel, the telecommunication circuit that is connected with the driven compressor plate and the telecommunication circuit that is connected with computing machine; Each telecommunication circuit is intended the frock plate with the internal control template die respectively, the driven compressor template die intends the frock plate and computer simulation frock plate connects one to one the transport communication data; Each is simulated the frock plate communication data that receives is fed back to the off-premises station control panel, and said off-premises station control panel compares feedback data that receives and the previous communication data that sends, if unanimity judges that then telecommunication circuit is normal.

Preferably; In said testing process to high-low level input type circuit; A said high-low level input type 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 with different toggle switchs respectively.

Preferably; A kind of preferred detection order as each functional circuit on the off-premises station control panel; Said off-premises station control panel after getting into self-check program, at first read functions tabulation, each item function executing listed according to feature list and the detection of the corresponding functional circuit of said each item function;

In testing process, carry out following steps successively:

(1) the pairing level state of default location to telecommunication circuit, dc fan driving circuit, senser sampling circuit, functional indicator light circuit, ac voltage detection circuit, lack detection circuit and high-low level input type circuit detects automatically; If it is all normal; Then carry out subsequent step; Otherwise stop testing process, and show corresponding DTC;

(2) drive relay class circuit operation, the external pilot lamp of control and relay is cycle lighting successively;

(3) control and the external pilot lamp of light current class driving circuit cycle lighting successively;

(3) display reminding information, notification technique personnel stir and the said high-low level input type mutually external toggle switch of circuit successively, if detect less than high and low two kinds of level states, then stop testing process, and show corresponding DTC.

Preferably, the step that the pairing level state of default location of original toggle switch detects automatically in the step (1) of said self-check program, also comprising the off-premises station control panel.

Further, said off-premises station control panel after powering on, at first detect its test interface whether short circuit or its a plurality of function buttons of being used to inquire about the machine operational factor whether be pressed; If then get into described self-check program; Otherwise whether short circuit or described a plurality of function buttons are pressed to detect said test interface in the setting-up time after powering on; If, then get into the special self-check program of toggle switch, be used for original toggle switch circuit on the said off-premises station control panel is detected; Be not pressed by short circuit or described a plurality of function buttons if in setting-up time, detect described test interface yet, then get into normal working procedure.

In order to realize the special self check of toggle switch circuit; After said self-check program finishes; The outage of control off-premises station control panel, the position of stirring of switching original toggle switch on the said off-premises station control panel is then to light current on the said off-premises station control panel; And the described test interface of short circuit is perhaps pressed described function button in setting-up time; Get into the special trace routine of toggle switch,, judge that then said toggle switch circuit is normal if detect the level state generation saltus step of said toggle switch circuit output; Otherwise, show DTC.

Compared with prior art; Advantage of the present invention and good effect are: the present invention is directed to automatic testing method that the off-premises station control panel of air conditioner proposed and not only can avoid testing process to damage that control panel to be detected caused; And through adopting artificial judgment and judging the mode that combines automatically; 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 the switch input quantity all can detect, and has both improved the accuracy of testing result, has also taken into account detection efficiency simultaneously.

After the detailed description in conjunction with the advantages embodiment of the present invention, other characteristics of the present invention and advantage will become clearer.

Description of drawings

Fig. 1 is the overall architecture synoptic diagram of the automatic detection device that is used for the 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

Describe in detail below in conjunction with the accompanying drawing specific embodiments of the invention.

The mode that air-conditioner outdoor unit control panel automatic testing method of the present invention adopts software and hardware to combine; Design the different detection strategy targetedly according to the classification of various functional circuits on the off-premises station control panel and the various interface type of processor (the microprocessor MCU generally to adopt on the present air-conditioner outdoor unit control panel is that example describes); And standard in addition, the main circuit that detects has telecommunication circuit, dc fan driving circuit, senser sampling circuit, a high-low level input type 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 of using simulation test frock plate and functional test procedures self, avoid testing process to treat detecting the off-premises station control panel or the air conditioner complete machine causes damage.Then adopt the mode that system is judged automatically and artificial subjective judgement combines for the judgement of testing result; Pay the utmost attention to the mode that MCU judges automatically; Can't realize automatically judging; Consider to reduce to greatest extent the artificial influence of judging error, reduce the artificial difficulty of judging, as far as possible to reach the purpose of design that reduces the artificial error in judgement probability of testing result.

Wherein, being judged to be main functional circuit with manual work mainly contains: 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 the master with MCU, but need artificial functional circuit of participating in to mainly contain: high-low level input type circuit, toggle switch circuit etc.

Through a concrete embodiment, come to be illustrated as in detail the automatic detection that realizes the air-conditioner outdoor unit control panel and pick-up unit and the concrete testing process that designs below.

Embodiment one; Present embodiment has the scope of application of broad in order to make the off-premises station control panel that is proposed detect strategy; Promptly can satisfy the detection requirement of all kinds air-conditioning product (for example 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 the different detection means to the different functions circuit.

Specifically, summary is designed with following detection mode:

(1) to the detection of telecommunication circuit:

For the telecommunication circuit on the off-premises station control panel; Present embodiment adopts the mode of formulating communication protocol in advance; Utilize off-premises station control panel and external communication class equipment to carry out two-way communication, and then whether judge correctly according to the communication data that sends and receive whether telecommunication circuit is normal.

In the present embodiment, said external communication class evaluation method selecting optimal equipment adopts simulation frock plate to connect the telecommunication circuit on the off-premises station control panel, with the auxiliary detection of accomplishing telecommunication circuit.

(2) to the detection of dc fan driving circuit:

For the dc fan driving circuit on the off-premises station control panel; Present embodiment adopts the mode of external simulation frock plate; Utilize the off-premises station control panel to send pulsating wave and receive the pulsating wave of simulating frock plate feedback, and then judge according to the waveform of the pulsating wave that receives and send whether described dc fan driving circuit is normal to simulation frock plate.

(3) to the detection of senser sampling circuit:

For the senser sampling circuit on the off-premises station control panel; Present embodiment adopts the mode of external fixed resistance; Utilize fixed resistance to replace sensor to connect described senser sampling circuit; And then the sampled value through the MCU read sensor sample circuit on the off-premises station control panel, the setting value with prior preservation compares then, and whether judge said senser sampling circuit thus normal.

(4) to the detection of high-low level input type circuit:

For the input of the high-low level on the off-premises station control panel type circuit; Present embodiment adopts the mode of external toggle switch; Through switching the position of toggle switch; And detect the level be input to MCU and whether comprise high level and low level two states, judge whether described high-low level input class circuit is normal.

(5) to the detection of relay class circuit:

For the relay class circuit on the 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; Present embodiment adopts the mode of external pilot lamp, lights and extinguishes and judge whether described relay class circuit is normal through the control pilot lamp.

(6) to the detection of electronic expansion valve-driving circuit and other light current class driving circuits:

For the circuit that the electronic expansion valve-driving circuit on the off-premises station control panel and other require light current to drive, present embodiment also preferably adopts the mode of external pilot lamp, lights successively and extinguishes and judge whether such circuit is normal through the control pilot lamp.

(7) to the detection of functional indicator light circuit:

For the functional indicator light circuit on the off-premises station control panel; Need not external any auxiliary detection circuit; Only need each functional indicator light of control this control procedure of lighting successively, extinguish and move in circles; And then whether light on request through the overview function pilot lamp, whether can judge described functional indicator light circuit normal.

(8) to the detection of ac voltage detection circuit:

For the ac voltage detection circuit on the off-premises station control panel; Adopt the mode of external AC power supply; AC power with external 220V is that example describes, and reads the magnitude of voltage of ac voltage detection circuit sampling output through the MCU on the off-premises station control panel, and then converts the magnitude of voltage of AC power to and compare with the setting value of preserving in advance; If equal 220V, judge that then said ac voltage detection circuit is normal; Otherwise, judge said ac voltage detection circuit fault.In the present embodiment, change the error range of the magnitude of voltage permission ± 5% of the AC power that generates through MCU.

(9) to the detection of lack detection circuit:

For the V on the off-premises station control panel, W lack detection circuit; Can adopt the mode of external AC power supply; AC power with external 220V is that example describes; Receive zero cross signal through the MCU on the off-premises station control panel,, judge automatically that then described lack detection circuit is normal if can receive N zero cross signal (preferred N=20) continuously.

(10) to the detection of key control circuit:

For the key control circuit on the off-premises station control panel; Can adopt through pressing the mode that the function button KEY1, KEY2, the KEY3 that are used to inquire about the machine operational factor on the off-premises station control panel come the trace routine of each functional circuit on the start-up control plate; Whether start operation through observing trace routine, come to accomplish in the lump detection key control circuit.

(11) detection of driving of logarithmic code pipe and display circuit:

Drive and display circuit for the charactron on the off-premises station control panel; Can adopt the mode of output DTC or information; When other functional circuits are detected, come to accomplish in the lump detection to said charactron driving and display circuit through the testing result of observing charactron output.

In conjunction with above-mentioned detection strategy, present embodiment at first designs a kind of automatic detection device to the off-premises station control panel, for the detection of each functional circuit on the off-premises station control panel provides hardware supports.

Referring to shown in Figure 1, the automatic detection device that is used for the air-conditioner outdoor unit control panel that present embodiment proposed mainly comprises simulation frock plate, fixed resistance R1, R2, toggle switch K1-K7, pilot lamp D1-D3 and stable AC power supply (present embodiment is that example describes with the AC power of 220V).Wherein, described simulation frock plate comprises the simulation frock plate and the simulation frock plate that is used to be connected the dc fan driving circuit that is used to connect telecommunication circuit.For the telecommunication circuit on the off-premises station control panel; Specifically comprise the telecommunication circuit that is used for the telecommunication circuit that is connected with the indoor set control panel, the telecommunication circuit that is connected with the driven compressor plate and is connected with computing machine; Each telecommunication circuit is intended the frock plate with the internal control template die respectively, the driven compressor template die intends the frock plate and computer simulation frock plate connects one to one the transport communication data.In the process that the each several part telecommunication circuit on the off-premises station control panel is detected; At first control the each several part telecommunication circuit to the simulation frock plate output communication data external with it through the MCU on the control panel; Simulation frock plate feeds back to the off-premises station control panel with said communication data former state after receiving communication data.MCU on the off-premises station control panel compares the feedback data that receives and its previous communication data that sends, if consistent, judges that then telecommunication circuit is normal, otherwise, judge that telecommunication circuit is unusual.For the detection order of each several part telecommunication circuit, present embodiment is not done requirement.

For the dc fan driving circuit on the off-premises station control panel, be connected mutual transmission pulse ripple with dc fan simulation frock plate.In the testing process of present embodiment, the MCU on the off-premises station control panel at first drives the PWM pulsating wave of dc fan driving circuit to connected simulation frock plate output setting dutycycle, and for example dutycycle is 25% pwm pulse ripple.After said dc fan simulation frock plate receives the pwm pulse ripple that the off-premises station control panel sends, the pulsating wave former state that receives is fed back to the off-premises station control panel.MCU on the said off-premises station control panel is behind the pulsating wave that receives simulation frock plate feedback; The pulsating wave of feedback pulse ripple that receives and transmission before it is compared; If waveform is consistent, promptly also be 25% pwm pulse ripple for dutycycle, judge that then the dc fan driving circuit is normal; Otherwise, judge described dc fan driving circuit fault.

Consider in present air-conditioner outdoor unit, generally all to be provided with temperature sensor and pressure transducer, the pressure that is respectively applied for inlet temperature, middle part temperature, outlet temperature, delivery temperature, suction temperature and the outdoor environment temperature and the compressor of heat exchanging device detects.For temperature sensor sampling circuit on the off-premises station control panel and pressure transducer sample circuit are detected; Present embodiment adopts the resistor R 1, R2 (for example precision is the fixed resistance of 1% 10K Ω) of fixed resistance value to replace temperature sensor and pressure transducer respectively, connects one to one with temperature sensor sampling circuit and pressure transducer sample circuit on the off-premises station control panel.Thus one, the voltage sample value that the MCU on the off-premises station control panel collects through temperature sensor sampling circuit and pressure transducer sample circuit is exactly a fixed value.Because pairing temperature value of this fixed value and force value can calculated in advance be come out; Be kept among the MCU; Therefore after the detection starting program; MCU only needs the temperature value and the force value of the pairing temperature value of voltage sample value that collects and force value and preservation are in advance compared respectively, if consistent, just temperature sensor sampling circuit on the decidable off-premises station control panel and pressure transducer sample circuit are normal; Otherwise, judge said temperature sensor sampling circuit and pressure transducer sample circuit fault.For the detection order of two parts sample circuit, present embodiment is not done requirement.

For the toggle switch K1-K7 in the automatic detection device; Be used for the off-premises station control panel on a high-low level input type circuit be connected; Through stirring the position of toggle switch K1-K7, and combine detected high-low level state, come the comprehensive detection of accomplishing high-low level input type circuit.In the present embodiment; Said high-low level input type 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 with different toggle switch K1-K7 respectively.Before detecting beginning, at first each toggle switch K1-K7 is toggled it to default location, the pairing level state of this default location is promptly known, for example each toggle switch K1-K7 is toggled it to the position ON of acquiescence, and ON pairing level state in position is high.After detecting beginning; Whether the level state that the MCU on the off-premises station control panel at first detects its each input interface that connects high-low level input type circuit is high, and level state is that the low high-low level that input interface connected an input type circuit can directly be judged to be fault; Level state is after the high high-low level that input interface connected input type circuit needs further toggle it to position OFF with connected toggle switch; If MCU receives low level; Could judge that this road high-low level input type circuit is normal; Otherwise, judge this road high-low level input type fault equally.

For the pilot lamp D1-D3 in the automatic detection device, be used for the 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 said 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 with different light current pilot lamp respectively.In said heavy-current relay output class circuit, specifically comprise the relay circuit that is used to control AC blower fan, relay circuit, A.C. contactor, heat tape pilot relay, outside output control relay and other forceful electric power class relay circuits that is used to control valve classes such as four-way valve, by-pass valve, coolant injection valve, reservation valve, connect one to one with different forceful electric power pilot lamp respectively.After detecting beginning, through driving each road pilot lamp cycle lighting successively, whether such circuit of artificial judgment is normal.

For the 220V AC power in the automatic detection device, respectively with the off-premises station control panel on be connected corresponding of ac voltage detection circuit with lack detection circuit.After detecting beginning,, judge whether described ac voltage detection circuit is normal through detecting whether the ac voltage that generates after the sample conversion is 220V; Whether there are a plurality of continuous zero cross signals to be received through detecting, judge whether described lack detection circuit is normal.

For the testing result of various functional circuits, can show through driving of the charactron on the off-premises station control panel and display circuit; Also can be employed in the internal control template die and intend the mode that the charactron circuit is set in the frock plate; Receive the display message that MCU generates according to testing result on the off-premises station control panel; And then the charactron of intending on the frock plate through the internal control template die shows DTC; With fault location position or display reminding information, and then the guidance technology personnel carry out follow-up testing process.

Off-premises station control panel to be detected is installed in the above-mentioned automatic detection device, just can starts the self-check program among the MCU, accomplish automatic detection each functional circuit on the off-premises station control panel.

In the present embodiment, described self check scheme can be carried out in two steps: the first step is carried out comprehensive self check, and second step was carried out the special self check of toggle switch.Here, the special self check of described toggle switch is that existing toggle switch circuit on the air-conditioner outdoor unit control panel is carried out the special process that detects.

For control system gets into the different detection program, present embodiment preferably adopts the mode that the test interface TEST on the air-conditioner outdoor unit control panel is carried out short circuit at times or presses function button KEY1, KEY2, KEY3 (said KEY1, KEY2, KEY3 are respectively the function button that is used to inquire about the machine operational factor on the off-premises station control panel) at times to realize.As a kind of preferred design, short circuit TEST mouth or the mode control system of pressing function button KEY1, KEY2, KEY3 got into comprehensive self-check program before present embodiment preferably was employed in control panel and powers on; And (in 30 seconds) short circuit TEST mouth or the mode control system of pressing function button KEY1, KEY2, KEY3 get into the special self-check program of toggle switch circuit in the setting-up time after being employed in control panel and powering on.Be not pressed by short circuit or function button KEY1, KEY2, KEY3 if detect the TEST mouth in the setting-up time of control panel after powering on, then get into normal working procedure.

Below in conjunction with Fig. 2 A, Fig. 2 B the design cycle of the special self-check program of described comprehensive self-check program and toggle switch circuit is carried out detailed explanation.

Shown in Fig. 2 A and Fig. 2 B, specifically may further comprise the steps:

S201, before the off-premises station control panel is powered on, at first with the test interface TEST short circuit on the control panel or function button KEY1, KEY2, KEY3 are pressed; Then,, utilize the power circuit on the control panel to convert the forceful electric power of importing on the control panel required working power of each load, be each electricity consumption electric to the logical forceful electric power of off-premises station control panel.

MCU on S202, the off-premises station control panel is after the operation that powers on; Whether whether at first detect the TEST mouth is pressed by short circuit or function button KEY1, KEY2, KEY3; If the TEST mouth is pressed by short circuit or function button KEY1, KEY2, KEY3, the comprehensive self-check program of operation automatically then; Otherwise, jump to step S213.

S203, MCU at first carry out initialization to program after starting comprehensive self-check program, read the feature list among the EEPROM, to confirm which functional circuit on the control panel is detected.

Here, because the function that the air conditioner of different type of machines is supported is different, therefore; Functional circuit on its off-premises station control panel also is not quite similar; The air conditioner type that for example has has lack detection circuit and high-low pressure holding circuit, and the type that has is not with, read functions tabulation before the self check process formally begins; Can only the functional circuit that truly has on the off-premises station control panel be detected by guidance system, to guarantee the accuracy of testing result.

In the present embodiment, said MCU at first visits EEPROM, and the read functions tabulation if the reading of data mistake does not for example read proper data in setting-up time, is then judged the EEPROM fault, stops testing process, and reports an error.If reading of data is normal, then carry out subsequent operation.

S204, automatically start 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 to the detection of the level state of the default location of original toggle switch circuit on the level state of the default location of high-low level input type circuit and the control panel.

In the present embodiment, the detection of functional indicator light driving circuit adopted drive each road pilot lamp in order successively and light and extinguished then in 1 second, and move in circles successively, till the control panel outage or withdrawing from trace routine.Whether normal for the functional indicator light driving circuit, need each road pilot lamp of manual observation whether to judge according to both definite sequence light on and off successively.

To the detection of telecommunication circuit on the control panel, comprise the detection of the telecommunication circuit that is used for the telecommunication circuit that is connected with the indoor set control panel, the telecommunication circuit that is connected with the driven compressor plate and is connected with computing machine.MCU sends the particular communication data according to the communication protocol of formulating in advance, and waits for the communication data that receives external simulation frock plate feedback.If data have and back, and the feedback data that receives is identical with the communication data that sends, and thinks that then telecommunication circuit is normal, and the charactron that drives on the off-premises station control panel perhaps shows " 0 " through the charactron that the internal control template die is intended on the frock plate; Otherwise, think to drive the telecommunication circuit fault charactron and show DTC, and stop testing process.In this process,, can accomplish detection in the lump to driving of the charactron on the off-premises station control panel and display circuit through observing the demonstration situation of charactron on the off-premises station control panel.

Detection to dc fan driving circuit on the control panel; MCU adopts the pwm pulse ripple of the certain dutycycle of output; And receive the mode that dc fan is simulated the pwm pulse ripple of frock plate feedback, whether judge through the consistance of detection waveform whether such circuit is normal.As a kind of preferred design of present embodiment, the MCU output duty cycle is 25% pwm pulse ripple, waits for the pulsating wave that receives dc fan simulation frock plate feedback then.If pulse signal has and back, and the dutycycle of the pwm pulse ripple through dc fan simulation frock plate feedback also is 25%, judges that then the dc fan driving circuit is normal, drives charactron demonstration " 0 "; Otherwise, judge dc fan driving circuit fault, drive charactron and show DTC, and stop testing process.

To the detection of control panel upper sensor sample circuit, comprise to the detection of temperature sensor sampling circuit with to the detection of 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; Then the determine sensor sample circuit is normal, drives charactron and shows " 0 "; In the present embodiment, the temperature value permissible error is ± 2 ℃, and the force value permissible error is ± 0.2MPa.Otherwise determine sensor sample circuit fault drives charactron and shows corresponding DTC, and stops testing process.

Detection to ac voltage detection circuit on the 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 the 220V alternating voltage generates via the ac voltage detection circuit conversion, and MCU utilizes its inner reverse transformation algorithm can converse the voltage magnitude of the AC power of input according to the dc voltage value that receives indirectly, if equal 220V; Think that then described ac voltage detection circuit is normal, drive charactron and show " 0 "; Otherwise, judge the ac voltage detection circuit fault, drive charactron and show DTC, and stop testing process.

Detection to lack detection circuit on the 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 at a plurality of zero cross signals of other numbers); Then think and drive described lack detection circuit no problem charactron and show " 0 "; Otherwise, judge lack detection circuit fault (because the AC power of external said lack detection circuit is the normal 220V AC power of selecting, so can not have the phase shortage problem), drive charactron and show corresponding DTC, and stop testing process.

To the detection of the acquiescence level state of type circuit of high-low level input on the control panel, comprise 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 and other require the detection of the on-off circuit of input high level signal.The MCU acquiescence receives high level signal, and promptly the default location of toggle switch is ON.MCU judges that automatically its each road connects whether the magnitude of voltage that the input interface of high-low level input type circuit receives is high level, if then think to drive a high-low level input type circuit no problem charactron and show " 0 "; Otherwise, judge high-low level input type fault, drive charactron and show corresponding DTC, and stop testing process.In this testing process, might be not the problem of high-low level input type circuit itself because the technician does not in advance toggle it to default location ON with toggle switch to cause.In order to address this problem; MCU is when driving charactron demonstration DTC; Continuation detects the level state that it receives low level input interface; If become high level (being that the technician toggles it to correct default location ON with toggle switch), think that then fault disappears, continue to carry out follow-up detection step.

Detection to the acquiescence level state of original toggle switch circuit on the control panel; Employing is as the detection mode of above-mentioned high-low level input type circuit, and promptly before trace routine began, the technician needed at first toggle switch to be toggled it to default location; For example position OFF promptly opens a way.After trace routine began, whether the level state that MCU detects its interface that connects said toggle switch circuit was high, if high, then thought to drive said toggle switch circuit no problem charactron and show " 0 "; Otherwise, judge said toggle switch fault, drive charactron and show corresponding DTC, and stop testing process.

S205, MCU are after formal testing process begins; Postpone setting-up time, for example after 6 seconds, judge that non-fault occurs; Then drive charactron display reminding information; Such as back three demonstrations " 000 " at charactron, normal with the above-mentioned detection of notification technique personnel, begin the detection of follow-up heavy-current relay output class circuit.

After S206, charactron show " 000 " two seconds (can certainly be set at other times), start the detection of heavy-current relay output class circuit automatically.

In the present embodiment; Said heavy-current relay output class circuit comprises the relay circuit that is used to control two AC blower fans, be used 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 (comprise four-way valve, by-pass valve, coolant injection valve and reserve valve etc.), a corresponding n heavy-current relay.MCU moves through the heavy-current relay of the n on the drive controlling plate successively; And then a control and the corresponding external n of a said n heavy-current relay forceful electric power pilot lamp (preferably adopting forceful electric power LED lamp) cycle lighting successively; Through the situation of lighting of manual observation pilot lamp, judge artificially whether described heavy-current relay output class circuit is normal.

The cycle lighting process of said pilot lamp can continue to carry out always, perhaps withdraws from trace routine up to the control panel outage.

S207, after postponing a period of time, for example postpone 2n after second, MCU starts the detection to light current class driving circuit automatically.

In the present embodiment, said light current class driving circuit comprises electronic expansion valve-driving circuit and other light current class driving circuits, m light current interface of corresponding MCU control.MCU is through the level of m light current interface on the drive controlling plate successively; And then control and said m the corresponding external m of a light current interface light current pilot lamp (preferably adopting light current LED lamp) cycle lighting successively; Through the situation of lighting of manual observation pilot lamp, judge artificially whether described light current class driving circuit is normal.

The cycle lighting process of said pilot lamp can continue to carry out always, perhaps withdraws from trace routine up to the control panel outage.

S208, after postponing a period of time; After for example postponing the cycle period of a light current LED lamp (suppose a light current LED lamp light 1 second, extinguished 1 second; Then a cycle period is 2m second); MCU drives charactron display reminding information, for example in back three demonstrations " 999 " of charactron, begins to carry out the detection of high-low level input type circuit with the notification technique personnel.

S209, technician toggle it to the position opposite with default location with the toggle switch that connects said high-low level input type circuit, for example the OFF position seeing that charactron shows after " 999 ".At this moment, if MCU detects low level, then drive charactron and show DTC; Then toggle switch is dialled again and got back to default location, for example the ON position if MCU detects high level, is then controlled charactron and is removed DTC.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 and other and require the toggle switch K1-K7 of the on-off circuit of input high level signal to carry out two-way stirring after; If being used to connect the input interface of high-low level input type circuit, each road of MCU all detects high and low two kinds of level states; Need not to consider the detection order; Think that then the high-low level input type circuit that is connected with this road input interface is normal; Otherwise charactron shows corresponding DTC, and stops testing process.

S210, detection finish, and MCU drives charactron display reminding information, and for example in back three demonstrations " 886 " of charactron, personnel detect end with notification technique.

S211, technician are seeing that charactron shows after " 886 ", and promptly the comprehensive self-check program of decidable finishes, and then the outage of control off-premises station control panel, prepare to get into the special self-check program of toggle switch circuit.

S212, technician all toggle it to the position opposite with default location with original toggle switch on the off-premises station control panel; ON position for example; 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) the TEST mouth short circuit on the off-premises station control panel is perhaps pressed function button KEY1, KEY2, KEY3.

S213, MCU detect the TEST mouth and are pressed by short circuit or function button KEY1, KEY2, KEY3 in 30 seconds after powering on, then get into the special self-check program of toggle switch circuit automatically.If MCU does not detect the TEST mouth yet and is pressed by short circuit or function button KEY1, KEY2, KEY3 in 30 seconds after powering on, then withdraw from the special self-check program of toggle switch circuit.

S214, MCU detect each road input interface that it connects the toggle switch circuit; If all detect low level (promptly with the opposite level of the pairing level state of default location); Judge that then said toggle switch circuit is normal; Drive charactron display reminding information, for example in back three demonstration " 888 " of charactron, with the special self-check program end of notification technique personnel toggle switch circuit; Otherwise, drive charactron and show corresponding DTC.If a plurality of faults are arranged, then each DTC shows 2 seconds, and the demonstration that circulates.

S215, special self-check program finish.

In the present embodiment, the fault for the off-premises station control panel shows that back three of the regulation charactron are DTC demonstration position.If DTC is merely units, then only show last position; If DTC is a double figures, then only show last two.Intend the frock 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 why hinder digital content, then can carry out conversion process and realize by the processor on the internal control template die plan frock plate.

As protection to above-mentioned self-check program, protection strategy below present embodiment proposes:

1, the protection of self-check program comprehensively

(1) be no more than 5 minutes the working time of self-check program comprehensively, otherwise withdraw from voluntarily, must all DTCs be removed when withdrawing from; And

If a) be in power-up state, time is up and withdraw from, and gets into the deadlock state after then withdrawing from self-check program;

B) if outage is withdrawed from, then handle by off-position;

(2) can only get into once self-check program comprehensively after powering at every turn, get into once more if desired, must re-power.

2, the protection of the special self-check program of toggle switch circuit

(1) is no more than 1 minute the working time of the special self-check program of toggle switch circuit (from TEST mouth short circuit or function button KEY1, KEY2, the KEY3 timing that is pressed), otherwise withdraws from voluntarily, must all DTCs be removed when withdrawing from; And

If a) be in power-up state, time is up and withdraw from, and gets into the deadlock state after then withdrawing from self-check program;

B) if outage is withdrawed from, then handle by off-position;

(2) can only get into the special self-check program of a toggle switch circuit after powering at every turn, get into once more if desired, must re-power.

The present invention is through adopting above-mentioned detection scheme; Can realize qualitative and quantitative detection to various types of air-conditioner outdoor unit control panels; Testing result is accurate more, reliable, and detecting operation is simple more, directly perceived, and the off-premises station control panel after the detection also more has quality assurance.

Certainly; The above only is a kind of preferred implementation of the present invention; Should be pointed out that for those skilled in the art, under the prerequisite that does not break away from the principle of the invention; Can also make some improvement and retouching, these improvement and retouching also should be regarded as protection scope of the present invention.

Claims (10)

1. the automatic testing method of an air-conditioner outdoor unit control panel is characterized in that: use the different detection means to the difference in functionality circuit on the off-premises station control panel, comprise
Detection to telecommunication circuit: formulate communication protocol, send and the received communication data, whether judge correctly through the data that detection receives whether telecommunication circuit is normal;
Detection to the dc fan driving circuit: external dc fan simulation frock plate, send the pulsating wave of pulsating wave and reception simulation frock plate feedback to simulation frock plate, judge according to the waveform of transmitting-receiving pulsating wave whether the dc fan driving circuit is normal;
Detection to senser sampling circuit: utilize fixed resistance to replace sensor to connect said senser sampling circuit, through the processor on the off-premises station control panel read sampled value and with setting value relatively, whether normal to judge said senser sampling circuit;
Detection to high-low level input type circuit: external toggle switch, whether the position of switching toggle switch has high and low two kinds of level inputs to judge whether said high-low level input type circuit is normal through detecting;
Detection to light current class driving circuit or relay class circuit: external pilot lamp, judge through control pilot lamp light on and off whether said light current class driving circuit or relay class circuit be normal.
2. the automatic testing method of air-conditioner outdoor unit control panel according to claim 1; Whether it is characterized in that: also comprise the detection to the functional indicator light circuit: the control function pilot lamp is lighted successively, is extinguished and moves in circles, light on request through the overview function pilot lamp and judge whether said 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 through receiving magnitude of voltage whether said 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 through detecting zero cross signal whether said 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: in said testing process telecommunication circuit; Said telecommunication circuit comprises the telecommunication circuit that is connected with the indoor set control panel, the telecommunication circuit that is connected with the driven compressor plate and the telecommunication circuit that is connected with computing machine; Each telecommunication circuit is intended the frock plate with the internal control template die respectively, the driven compressor template die intends the frock plate and computer simulation frock plate connects one to one the transport communication data; Each is simulated the frock plate communication data that receives is fed back to the off-premises station control panel, and said off-premises station control panel compares feedback data that receives and the previous communication data that sends, if unanimity judges that then 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 said testing process high-low level input type circuit; A said high-low level input type 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 with different toggle switchs respectively.
7. according to the automatic testing method of each described air-conditioner outdoor unit control panel in the claim 4 to 6; It is characterized in that: said off-premises station control panel is after getting into self-check program; At first read functions tabulation, each item function executing listed according to feature list and the detection of the corresponding functional circuit of said each item function;
In testing process, carry out following steps successively:
(1) the pairing level state of default location to telecommunication circuit, dc fan driving circuit, senser sampling circuit, functional indicator light circuit, ac voltage detection circuit, lack detection circuit and high-low level input type circuit detects automatically; If it is all normal; Then carry out subsequent step; Otherwise stop testing process, and show corresponding DTC;
(2) drive relay class circuit operation, the external pilot lamp of control and relay is cycle lighting successively;
(3) control and the external pilot lamp of light current class driving circuit cycle lighting successively;
(3) display reminding information, notification technique personnel stir and the said high-low level input type mutually external toggle switch of circuit successively, if detect less than high and low two kinds of level states, then stop testing process, and show corresponding DTC.
8. the automatic testing method of air-conditioner outdoor unit control panel according to claim 7 is characterized in that: the step that the pairing level state of default location of original toggle switch detects automatically in the step (1) of said self-check program, also comprising the off-premises station control panel.
9. the automatic testing method of air-conditioner outdoor unit control panel according to claim 8 is characterized in that: said off-premises station control panel after powering on, at first detect its test interface whether short circuit or its a plurality of function buttons of being used to inquire about the machine operational factor whether be pressed; If then get into described self-check program; Otherwise whether short circuit or described a plurality of function buttons are pressed to detect said test interface in the setting-up time after powering on; If, then get into the special self-check program of toggle switch, be used for original toggle switch circuit on the said off-premises station control panel is detected; Be not pressed by short circuit or described a plurality of function buttons if in setting-up time, detect described test interface yet, then get into 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 said self-check program finishes; The outage of control off-premises station control panel, the position of stirring of switching original toggle switch on the said off-premises station control panel is then to light current on the said off-premises station control panel; And the described test interface of short circuit is perhaps pressed described function button in setting-up time; Get into the special trace routine of toggle switch,, judge that then said toggle switch circuit is normal if detect the level state generation saltus step of said toggle switch circuit output; Otherwise, show DTC.
CN201210286154.2A 2012-08-13 2012-08-13 Method for automatically detecting air conditioner outdoor unit control panel CN102789230B (en)

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CN103982453B (en) * 2014-05-28 2016-06-29 浪潮电子信息产业股份有限公司 A kind of fan control board online test method
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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
CN104566838A (en) * 2015-02-02 2015-04-29 珠海格力电器股份有限公司 Method and device for detecting faults of air conditioner
CN104566838B (en) * 2015-02-02 2017-11-14 珠海格力电器股份有限公司 The fault detection method and device of air conditioner
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CN107966975A (en) * 2016-10-19 2018-04-27 中兴通讯股份有限公司 A kind of fan control board test system and method
CN107024920A (en) * 2017-04-20 2017-08-08 青岛海信日立空调系统有限公司 A kind of method of fault diagnosis, device and air-conditioning system
CN107168840A (en) * 2017-05-19 2017-09-15 郑州云海信息技术有限公司 A kind of server UIDLED lamp function test methods for possessing foolproof function
CN108592246A (en) * 2018-04-27 2018-09-28 珠海格力电器股份有限公司 The control method of outdoor unit and air conditioner and outdoor unit
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