CN202735842U - Automatic detection device for air conditioner outdoor unit control board - Google Patents

Automatic detection device for air conditioner outdoor unit control board Download PDF

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Publication number
CN202735842U
CN202735842U CN 201220398593 CN201220398593U CN202735842U CN 202735842 U CN202735842 U CN 202735842U CN 201220398593 CN201220398593 CN 201220398593 CN 201220398593 U CN201220398593 U CN 201220398593U CN 202735842 U CN202735842 U CN 202735842U
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CN
China
Prior art keywords
circuit
control panel
outdoor unit
premises station
automatic detection
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CN 201220398593
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Chinese (zh)
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 CN 201220398593 priority Critical patent/CN202735842U/en
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Publication of CN202735842U publication Critical patent/CN202735842U/en

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Abstract

The utility model discloses an automatic detection device for an air conditioner outdoor unit control board. The automatic detection device for the air conditioner outdoor unit control board comprises a simulation tool board, a fixed resistor, a code dialing switch and an indicator light; the simulation tool board is connected with a communication circuit on the to-be-detected outdoor unit control board, and achieves interaction of communicated data according to an established communication protocol; the fixed resistor replaces a sensor and is connected with a sensor sampling circuit on the to-be-detected outdoor unit control board; the code dialing switch is connected with a high-low level input type circuit on the to-be-detected outdoor unit control board; and the indicator light is connected with a weak current type driver circuit or a relay type circuit on the to-be-detected outdoor unit control board. By means of the adoption of the automatic detection device, the qualitative and quantitative detections for various types of air conditioner outdoor unit control boards can be achieved, detection results are accurate and reliable, detection operation is simple and intuitive, and the outdoor unit control boards after being detected have quality assurance.

Description

The automatic detection device that is used for the air-conditioner outdoor unit control panel

Technical field

The utility model belongs to the air conditioning and refrigeration field of engineering technology, specifically, relates to a kind of device that detects 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 the off-premises station, all is provided with for the control panel that execution unit is 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 and off-premises station control panel to air-conditioning products carry out.

At present, the detection method that proposes for the off-premises station control panel of air-conditioning products has a variety of, but all is the detection mode that adopts external load mainly, 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 the fault machine to increase, hardware cost raises.In addition, because traditional detection method all is to judge the quality of control panel by the actual motion state of observing 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 not necessarily really be exactly certified products even if detect qualified control panel, the accuracy of testing result existed query.

Summary of the invention

The purpose of this utility model is to provide a kind of automatic detection device for the 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 utility model is achieved by the following technical solutions:

A kind of automatic detection device for the air-conditioner outdoor unit control panel comprises simulation working plate, fixed resistance, toggle switch and pilot lamp; Described simulation working plate connects the telecommunication circuit on the off-premises station control panel to be detected, according to the communication protocol interactive communication data of formulating; Described fixed resistance replacement sensor connects the senser sampling circuit on the off-premises station control panel to be detected; Described toggle switch connects the high-low level input class circuit on the off-premises station control panel to be detected; Described pilot lamp connects light current class driving circuit or the relay class circuit on the off-premises station control panel to be detected.

Wherein, described simulation working plate comprises that the internal control template die is intended working plate, the driven compressor template die is intended working plate and computer simulation working plate, respectively with off-premises station control panel to be detected on the telecommunication circuit that is used for being connected with the indoor set control panel, be used for the telecommunication circuit that is connected with the driven compressor plate and the telecommunication circuit that is used for being connected with computing machine connects one to one.

Further, intend being provided with the charactron circuit in the working plate at described internal control template die, show diagnostic trouble code or the information of off-premises station control panel output to be detected.

Further again, in described automatic detection device, also comprise for the dc fan simulation working plate that is connected with dc fan driving circuit on the off-premises station control panel to be detected, transmitted in both directions pulsating wave.

Wherein, described fixed resistance comprises two, respectively with off-premises station control panel to be detected on temperature sensor sampling circuit and pressure transducer sample circuit connect one to one.

Wherein, described toggle switch comprises multichannel, respectively with off-premises station control panel to be detected on 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 on-off circuit and connect one to one.

Preferably, described light current class driving circuit comprises electronic expansion valve-driving circuit and outside output circuit, connects one to one from different light current pilot lamp respectively.

Preferably, described relay class circuit is heavy-current relay output class circuit, comprise relay for the control AC blower fan, be used for relay, A.C. contactor, heat tape pilot relay and the outside output control relay of operation valve class, connect one to one from different forceful electric power pilot lamp respectively.

Further, in described automatic detection device, also be provided with 220V AC power incoming end, connect the ac voltage detection circuit on the off-premises station control panel, by the magnitude of voltage that collects being detected to judge whether ac voltage detection circuit is normal.

Further, in described automatic detection device, also be provided with 220V AC power incoming end, connect the lack detection circuit on the off-premises station control panel, judge by receiving zero cross signal whether described lack detection circuit is normal.

Compared with prior art, advantage of the present utility model and good effect are: the damage that the automatic detection device that the utility model proposes for the off-premises station control panel of air conditioner not only can avoid testing process that control panel to be detected is caused, and by adopting artificial judgment and automatically judging the mode that combines, 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, both improve the accuracy of testing result, also taken into account detection efficiency simultaneously.

After reading by reference to the accompanying drawings the detailed description of the utility model embodiment, other characteristics of the present utility model and advantage will become clearer.

Description of drawings

Fig. 1 is the overall architecture synoptic diagram for the automatic detection device that the air-conditioner outdoor unit control panel is detected that the utility model proposes;

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.

Embodiment

Below in conjunction with accompanying drawing embodiment of the present utility model is described in detail.

The mode that air-conditioner outdoor unit control panel automatic testing method of the present utility model adopts software and hardware to combine, various interface type according to the classification of various functional circuits on the off-premises station control panel and processor (Micro-processor MCV that generally adopts on the present air-conditioner outdoor unit control panel describe for example) designs different detection strategies targetedly, and standard in addition, the main circuit that detects has telecommunication circuit, the dc fan driving circuit, senser sampling circuit, high-low level input class circuit, relay class circuit, light current class driving circuit, the 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 working plate and functional test procedures self, avoid testing process to treat and detect off-premises station control panel or air conditioner complete machine injury.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 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 manually to be 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 the master with MCU, but need the artificial functional circuit that participates in to mainly contain: high-low level input class circuit, toggle switch circuit etc.

Below by a specific embodiment, elaborate the pick-up unit and the concrete testing process that design for the automatic detection that realizes the air-conditioner outdoor unit control panel.

Embodiment one, present embodiment is in order to have the wider scope of application so that the off-premises station control panel that proposes detects strategy, namely can satisfy 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, 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 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 judge correctly whether telecommunication circuit normal.

In the present embodiment, described external communication class equipment preferably adopts the telecommunication circuit on the simulation working plate connection off-premises station control panel, with the auxiliary detection of finishing 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 working plate, utilize the off-premises station control panel to simulation working plate transmitted ripple and receive the pulsating wave that the simulation working plate feeds back, and then judge according to the waveform of the pulsating wave that receives and send whether described dc fan driving circuit is normal.

(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 by the MCU read sensor sample circuit on the off-premises station control panel, then the setting value with prior preservation compares, and whether judge thus described senser sampling circuit normal.

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

For the input of the high-low level on off-premises station control panel class circuit, present embodiment adopts the mode of external toggle switch, by 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 to judge whether described relay class circuit is normal by the control pilot lamp.

(6) to the detection of 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 the off-premises station control panel and other, present embodiment also preferably adopts the mode of external pilot lamp, lights successively and extinguishes to judge whether such circuit is normal by 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 by 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, 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 the off-premises station control panel, and then convert the magnitude of voltage of AC power to and compare with the setting value of pre-save, if equal 220V, judge that then 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 that generates by 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, describe as an example of the AC power of external 220V example, receive zero cross signal by the MCU on the off-premises station control panel, if can receive continuously N zero cross signal (preferred N=20), judge automatically that then described lack detection circuit is normal.

(10) to the detection of key control circuit:

For the key control circuit on the off-premises station control panel, can adopt the mode that starts the trace routine of each functional circuit on the control panel by pressing function button KEY1, the KEY2, the KEY3 that are used for inquiry machine operational factor on the off-premises station control panel, whether start operation by observing trace routine, finish 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 the off-premises station control panel, can adopt the mode of output diagnostic trouble code or information, when other functional circuits are detected, finish in the lump that by the testing result of observing charactron output described charactron is driven and the detection of display circuit.

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

Referring to shown in Figure 1, the automatic detection device that is used for the air-conditioner outdoor unit control panel that present embodiment proposes mainly comprises simulation working plate, fixed resistance R1, R2, toggle switch K1-K7, pilot lamp D1-D3 and stable AC power (present embodiment describes as an example of the AC power of 220V example).Wherein, described simulation working plate comprises for the simulation working plate that connects telecommunication circuit and the simulation working plate that is connected connecting the dc fan driving circuit.For the telecommunication circuit on the off-premises station control panel, specifically comprise 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 the telecommunication circuit that is connected with computing machine, each telecommunication circuit is intended working plate with the internal control template die respectively, the driven compressor template die intends working plate and the computer simulation working 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 working plate output communication data external with it by the MCU on the control panel, the simulation working plate feeds back to the off-premises station control panel with described communication data former state after receiving communication data.MCU on the off-premises station control panel compares feedback data and its previous communication data that sends that receives, 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 working plate.In the testing process of present embodiment, the MCU on the off-premises station control panel at first drives the dc fan driving circuit to the PWM pulsating wave of connected simulation working plate output setting dutycycle, and for example dutycycle is 25% pwm pulse ripple.After described dc fan simulation working 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 described off-premises station control panel is behind the pulsating wave that receives simulation working plate feedback, the feedback pulse ripple that receives and the pulsating wave that sends before it are compared, if waveform is consistent, it namely also is 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 generally all to be provided with temperature sensor and pressure transducer in present air-conditioner outdoor unit, the pressure that is respectively applied 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 the off-premises station control panel and pressure transducer sample circuit are detected, resistor R1, the R2(that present embodiment adopts fixed resistance value for example precision is the fixed resistance of 1% 10K Ω) replace respectively temperature sensor and pressure transducer, connect 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 by temperature sensor sampling circuit and pressure transducer sample circuit is exactly a fixed value.Since the corresponding temperature value of this fixed value and force value can calculated in advance out, be kept among the MCU, therefore after the start detection program, the corresponding temperature value of voltage sample value that MCU only need collect and force value and temperature value and the force value of preserving in advance compare respectively, if consistent, just can judge that temperature sensor sampling circuit and pressure transducer sample circuit on the 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, present embodiment is not done requirement.

For the toggle switch K1-K7 in the automatic detection device, be used for being connected with high-low level input class circuit on the off-premises station control panel, by stirring the position of toggle switch K1-K7, and in conjunction with the high-low level state that detects, comprehensively finish the detection to high-low level input class circuit.In the present embodiment; described high-low level input class circuit specifically 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 require the on-off circuit of the flat signal of input height, connects one to one from different toggle switch K1-K7 respectively.Before detecting beginning, at first each toggle switch K1-K7 is toggled it to default location, the corresponding level state of this default location is namely 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 detecting beginning, MCU on the off-premises station control panel detects at first whether its level state that connects each input interface of high-low level input class circuit is high, and level state is that the high-low level input class circuit that low input interface connects can directly be judged to be fault; Level state is after high-low level input class circuit needs that high input interface connects further toggle it to position OFF with connected toggle switch, if MCU receives low level, could judge that this road high-low level input class circuit is normal, otherwise, judge equally this road high-low level input class fault.

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 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 the control AC blower fan, be used for 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 control four-way valve, by-pass valve, coolant injection valve, reserving valve, connect one to one from different forceful electric power pilot lamp respectively.After detecting beginning, circulate successively and light by driving each road pilot lamp, whether such circuit of artificial judgment is normal.

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

For the testing result of various functional circuits, can show by the driving of the charactron on the off-premises station control panel and display circuit; Also can adopt the mode of intending arranging in the working plate charactron circuit at the internal control template die, receive the demonstration information that MCU generates according to testing result on the off-premises station control panel, and then the charactron of intending on the working plate by the internal control template die shows diagnostic trouble code, with location abort situation 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, finish the automatic detection to 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 carries 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 enters different trace routines, present embodiment preferably adopt to the test interface TEST on the air-conditioner outdoor unit control panel carry out at times short circuit or press at times function button KEY1, KEY2, the described KEY1 of KEY3(, KEY2, KEY3 are respectively the function button that is used for inquiry machine operational factor on the off-premises station control panel) mode realized.As a kind of preferred design, the mode control system that 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 the 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.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 enter 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 described in detail.

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 press with the test interface TEST short circuit on the control panel or with function button KEY1, KEY2, KEY3; Then, to the logical forceful electric power of off-premises station control panel, utilize the power circuit on the control panel to convert the forceful electric power of inputting on the control panel required working power of each load, be each electricity consumption load supplying.

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 automatic comprehensive self-check program of operation 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 determine 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 is with lack detection circuit and high-low pressure holding circuit, and the type that has is not with, read functions tabulation before process of self-test 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, described MCU at first accesses EEPROM, and the read functions tabulation if the reading out data mistake does not for example read correct data in setting-up time, is then judged the EEPROM fault, stops testing process, and reports an error.If reading out data is normal, then carry out subsequent operation.

S204, automatically start voluntarily detection 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 class circuit and the control panel.

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

To the detection of telecommunication circuit on the control panel, comprise the detection 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 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 that receives is identical with the communication data that sends, and thinks that then telecommunication circuit is normal, and the charactron on the driving off-premises station control panel or the charactron of intending on the working plate by the internal control template die show " 0 "; Otherwise, think to drive the telecommunication circuit fault charactron and show diagnostic trouble code, and stop testing process.In this process, by observing the demonstration situation of charactron on the off-premises station control panel, can finish in the lump the detection to the driving of the charactron on the off-premises station control panel and display circuit.

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 working plate feedback, whether judge by 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, then waits for the pulsating wave that receives dc fan simulation working plate feedback.If pulse signal has to have back, and the dutycycle of the pwm pulse ripple by dc fan simulation working plate feedback also is 25%, judges that then the dc fan driving circuit is normal, drives charactron and shows " 0 "; Otherwise, judge dc fan driving circuit fault, drive charactron and show diagnostic trouble code, 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 with it corresponding temperature value or force value to, compare with the setting value of pre-save, 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 diagnostic trouble code, 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, MCU utilizes its inner reverse transformation algorithm can indirectly converse according to the dc voltage value that receives the voltage magnitude of the AC power of input, 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 diagnostic trouble code, 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 as 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 described lack detection circuit is the normal 220V AC power of selecting, so can not have the phase shortage problem), drive charactron and show corresponding diagnostic trouble code, and stop testing process.

To the detection of the acquiescence level state of high-low level input class circuit 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 namely the default location of toggle switch is ON.Whether the magnitude of voltage that the input interface of its each road connection high-low level input class circuit of MCU automatic decision receives is high level, if then think to drive high-low level input class circuit no problem charactron and show " 0 "; Otherwise, judge high-low level input class fault, drive charactron and show corresponding diagnostic trouble code, and stop testing process.In this testing process, might because the technician does not in advance toggle it to default location ON with toggle switch to cause, be not the problem of high-low level input class circuit itself.In order to address this problem, MCU is when driving charactron demonstration diagnostic trouble code, 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 detecting 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 class circuit, and namely before trace routine began, the technician needed at first toggle switch to be toggled it to default location, for example position OFF namely opens a way.After trace routine began, whether the level state that MCU detects its interface that connects described toggle switch circuit was high, if high, then thought to drive described toggle switch circuit no problem charactron and show " 0 "; Otherwise, judge described toggle switch fault, drive charactron and show corresponding diagnostic trouble code, 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 rear 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 as other times), automatically start the detection of heavy-current relay output class circuit.

In the present embodiment, described heavy-current relay output class circuit comprises for the relay circuit of two AC blower fans of control, is used for relay circuit, A.C. contactor, heat tape pilot relay, outside output control relay and other forceful electric power class relay circuits of operation valve class (comprising four-way valve, by-pass valve, coolant injection valve and reserving valve etc.), a corresponding n heavy-current relay.MCU moves successively by n the heavy-current relay that drives on the control panel, and then control circulates successively with the corresponding external n of a described n heavy-current relay forceful electric power pilot lamp (preferably adopting forceful electric power LED lamp) and lights, by the situation of lighting of manual observation pilot lamp, judge artificially 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 cuts off the power supply or withdraws from trace routine.

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, described 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 by driving successively the level of m light current interface on the control panel, and then control circulates successively with described m the corresponding external m of a light current interface light current pilot lamp (preferably adopting light current LED lamp) and lights, by the situation of lighting of manual observation pilot lamp, judge artificially 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 cuts off the power supply or withdraws from trace routine.

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 rear three demonstrations " 999 " of charactron, begin to carry out the detection of high-low level input class circuit with the notification technique personnel.

S209, technician are seeing that charactron shows after " 999 ", the toggle switch that connects described high-low level input class circuit are toggled it to the position opposite with default location, for example the OFF position.At this moment, if MCU detects low level, then drive charactron and show diagnostic trouble code; Then toggle switch is pulled back to default location again, for example the ON position if MCU detects high level, is then controlled charactron and is removed diagnostic trouble code.Successively to external high tension protection circuit; low-voltage protection circuit; combine inspection detector switch circuit; the overheat of compressor holding circuit; the refrigerant recovering on-off circuit; after outside input circuit and other require the toggle switch K1-K7 of the on-off circuit of input high level signal to carry out two-way stirring; if being used for the input interface of connection high-low level input class circuit, each road of MCU all detects height; low two kinds of level states; need not to consider the detection order; think that then the high-low level input class circuit that is connected with this road input interface is normal; otherwise; charactron shows corresponding diagnostic trouble code, and stops testing process.

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

S211, technician are seeing that charactron shows after " 886 ", can judge that comprehensive self-check program finishes, and then the outage of control off-premises station control panel, prepare to enter 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) press with the TEST mouth short circuit on the off-premises station control panel or with 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 automatically enter the special self-check program of toggle switch circuit.If MCU does not detect yet the TEST mouth 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 (i.e. the level opposite with the corresponding level state of default location), judge that then 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 and show corresponding diagnostic trouble code.If a plurality of faults are arranged, then each diagnostic trouble code 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 rear three of the regulation charactron are diagnostic trouble code demonstration position.If diagnostic trouble code only is units, then only show last position; If diagnostic trouble code is double figures, then 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 show why hinder digital content at charactron, then can carry out conversion process by the processor on the internal control template die plan working plate and realize.

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

1, the comprehensively protection of self-check program

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

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

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

(2) can only enter once comprehensively self-check program 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) is 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 withdraws from voluntarily, all diagnostic trouble code must be removed when withdrawing from; And

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

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

(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 utility model 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 is more accurate, reliable, detects operation more simply, intuitively, 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 utility model; should be noted that; for those skilled in the art; under the prerequisite that does not break away from the utility model principle; can also make some improvements and modifications, these improvements and modifications also should be considered as protection domain of the present utility model.

Claims (10)

1. an automatic detection device that is used for the air-conditioner outdoor unit control panel is characterized in that: comprise simulation working plate, fixed resistance, toggle switch and pilot lamp; Described simulation working plate connects the telecommunication circuit on the off-premises station control panel to be detected, according to the communication protocol interactive communication data of formulating; Described fixed resistance replacement sensor connects the senser sampling circuit on the off-premises station control panel to be detected; Described toggle switch connects the high-low level input class circuit on the off-premises station control panel to be detected; Described pilot lamp connects light current class driving circuit or the relay class circuit on the off-premises station control panel to be detected.
2. the automatic detection device for the air-conditioner outdoor unit control panel according to claim 1, it is characterized in that: described simulation working plate comprises that the internal control template die is intended working plate, the driven compressor template die is intended working plate and computer simulation working plate, respectively with off-premises station control panel to be detected on the telecommunication circuit that is used for being connected with the indoor set control panel, be used for the telecommunication circuit that is connected with the driven compressor plate and the telecommunication circuit that is used for being connected with computing machine connects one to one.
3. the automatic detection device for the air-conditioner outdoor unit control panel according to claim 2 is characterized in that: intend being provided with the charactron circuit in the working plate at described internal control template die, show diagnostic trouble code or the information of off-premises station control panel output to be detected.
4. the automatic detection device for the air-conditioner outdoor unit control panel according to claim 1, it is characterized in that: in described automatic detection device, also comprise for the dc fan simulation working plate that is connected with dc fan driving circuit on the off-premises station control panel to be detected, transmitted in both directions pulsating wave.
5. the automatic detection device for the air-conditioner outdoor unit control panel according to claim 1, it is characterized in that: described fixed resistance comprises two, respectively with off-premises station control panel to be detected on temperature sensor sampling circuit and pressure transducer sample circuit connect one to one.
6. the automatic detection device for the air-conditioner outdoor unit control panel according to claim 1; it is characterized in that: described toggle switch comprises multichannel, respectively with off-premises station control panel to be detected on 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 on-off circuit and connect one to one.
7. the automatic detection device for the air-conditioner outdoor unit control panel according to claim 1, it is characterized in that: described light current class driving circuit comprises electronic expansion valve-driving circuit and outside output circuit, connects one to one from different light current pilot lamp respectively.
8. the automatic detection device for the air-conditioner outdoor unit control panel according to claim 1, it is characterized in that: described relay class circuit is heavy-current relay output class circuit, comprise relay for the control AC blower fan, be used for relay, A.C. contactor, heat tape pilot relay and the outside output control relay of operation valve class, connect one to one from different forceful electric power pilot lamp respectively.
9. each described automatic detection device for the air-conditioner outdoor unit control panel in 8 according to claim 1, it is characterized in that: in described automatic detection device, also be provided with 220V AC power incoming end, connect the ac voltage detection circuit on the off-premises station control panel.
10. each described automatic detection device for the air-conditioner outdoor unit control panel in 8 according to claim 1, it is characterized in that: in described automatic detection device, also be provided with 220V AC power incoming end, connect the lack detection circuit on the off-premises station control panel.
CN 201220398593 2012-08-13 2012-08-13 Automatic detection device for air conditioner outdoor unit control board CN202735842U (en)

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Application Number Priority Date Filing Date Title
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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103277878A (en) * 2013-04-25 2013-09-04 广东志高空调有限公司 Commodity inspection box used for inspecting base station air conditioner with communicating function
CN106292619A (en) * 2015-06-11 2017-01-04 河南思维自动化设备股份有限公司 LKJ train control system condition monitoring and fault diagnosis method and system
CN108983073A (en) * 2018-08-03 2018-12-11 海信(山东)空调有限公司 A kind of detection method and detection system of driving plate

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103277878A (en) * 2013-04-25 2013-09-04 广东志高空调有限公司 Commodity inspection box used for inspecting base station air conditioner with communicating function
CN106292619A (en) * 2015-06-11 2017-01-04 河南思维自动化设备股份有限公司 LKJ train control system condition monitoring and fault diagnosis method and system
CN108983073A (en) * 2018-08-03 2018-12-11 海信(山东)空调有限公司 A kind of detection method and detection system of driving plate

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