CN109945396B - Air conditioner, and detection method and detection device for driving circuit fault - Google Patents
Air conditioner, and detection method and detection device for driving circuit fault Download PDFInfo
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- CN109945396B CN109945396B CN201910227242.7A CN201910227242A CN109945396B CN 109945396 B CN109945396 B CN 109945396B CN 201910227242 A CN201910227242 A CN 201910227242A CN 109945396 B CN109945396 B CN 109945396B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
- F24F11/32—Responding to malfunctions or emergencies
- F24F11/38—Failure diagnosis
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/88—Electrical aspects, e.g. circuits
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- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Health & Medical Sciences (AREA)
- Biomedical Technology (AREA)
- Air Conditioning Control Device (AREA)
- Control Of Electric Motors In General (AREA)
Abstract
The application discloses air conditioner, detection method and detection device of drive circuit trouble, detection method includes: continuously outputting 6 paths of PWM driving signals to corresponding 6 switching tubes; acquiring voltage between any two phase output ends of the driving circuit; and judging whether the driving circuit has faults or not according to the voltage. The detection method can simply, quickly and efficiently locate the fault point under the condition of not replacing the device so as to be convenient for maintenance.
Description
Technical Field
The present disclosure relates to the field of air conditioners, and particularly to a method and a device for detecting a failure of a driving circuit, and an air conditioner having the device.
Background
In the technical field of air conditioners, when a driving circuit of an electric control board of a compressor or an outdoor driving compressor fails, the compressor cannot operate, and at the moment, the problem of the compressor or the driving circuit of the electric control board needs to be checked.
Due to the complexity and the specialty of the driving circuit of the electric control board, it is difficult for a maintenance person to judge which part of the components of the driving circuit of the electric control board have problems on site, and the problem can be solved only by the following method: firstly, replacing the electric control board, then restarting the machine for testing, if the electric control board can normally run, proving that the problem occurs in the driving circuit of the electric control board, and solving the problem by replacing the electric control board; if the compressor still can not normally operate after the electric control board is replaced, the problem of the compressor is proved, and the problem can be solved by replacing the compressor. However, this detection method cannot locate the fault point quickly, has low detection efficiency, and can only detect the problem by replacing the device.
Disclosure of Invention
The embodiment of the application provides a method and a device for detecting faults of an air conditioner and a driving circuit, and can simply, quickly and efficiently locate a fault point under the condition of not replacing a device so as to facilitate maintenance.
The embodiment of the application provides a method for detecting faults of a driving circuit, which comprises the following steps: continuously outputting 6 paths of PWM (Pulse Width Modulation) driving signals to corresponding 6 switching tubes; acquiring voltage between any two phase output ends of the driving circuit; and judging whether the driving circuit has faults or not according to the voltage.
In addition, the method for detecting the failure of the driving circuit according to the above embodiment of the present application may further have the following additional technical features:
in an embodiment of the present application, the determining whether the driving circuit fails according to the voltage includes: judging whether the voltage is within a set voltage range; if not, judging that the driving circuit has a fault.
In one embodiment of the present application, the driving circuit is used to drive a compressor of an air conditioner.
In an embodiment of the application, the detection method further includes: and after the air conditioner is detected to enter the overhaul test mode, the step of continuously outputting 6 paths of PWM driving signals to corresponding 6 switching tubes is executed.
In an embodiment of the application, the detection method further includes: after receiving an instruction of entering a forced refrigeration mode sent by an indoor unit, detecting the current of the compressor; judging whether the compressor is connected with the driving circuit or not according to the current; and if not, controlling the air conditioner to enter the overhaul test mode.
The embodiment of the application provides a detection device for driving circuit fault, including: the output module is used for continuously outputting 6 paths of PWM driving signals to corresponding 6 switching tubes; the acquisition module is used for acquiring the voltage between any two phase output ends of the driving circuit; and the judging module is used for judging whether the driving circuit has faults or not according to the voltage.
In addition, the detection device for driving circuit faults according to the embodiment of the application can also have the following additional technical characteristics:
in an embodiment of the present application, the determining module is specifically configured to: judging whether the voltage is within a set voltage range; if not, judging that the driving circuit has a fault.
In one embodiment of the present application, the driving circuit is used to drive a compressor of an air conditioner.
In one embodiment of the present application, the output module is further configured to: and after the air conditioner is detected to enter the overhaul test mode, the step of continuously outputting 6 paths of PWM driving signals to corresponding 6 switching tubes is executed.
In one embodiment of the present application, the output module is further configured to: after receiving an instruction of entering a forced refrigeration mode sent by an indoor unit, detecting the current of the compressor; judging whether the compressor is connected with the driving circuit or not according to the current; and if not, controlling the air conditioner to enter the overhaul test mode.
The embodiment of the application provides an air conditioner, which comprises the device for detecting the faults of the driving circuit.
An embodiment of the present application provides an electronic device, including: the detection method comprises a memory, a processor and a computer program which is stored on the memory and can run on the processor, wherein when the processor executes the program, the detection method for the driving circuit fault is realized.
The embodiment of the application provides a computer readable storage medium, on which a computer program is stored, wherein the program is used for realizing the method for detecting the driving circuit fault when being executed by a processor.
One or more technical solutions provided in the embodiments of the present application have at least the following technical effects or advantages:
this application is through continuously outputting 6 way PWM drive signal to 6 switch tubes that correspond to acquire the voltage between the arbitrary two-phase output of drive circuit, judge whether drive circuit breaks down according to voltage, thereby can be under the condition of not changing the device simply, fast, fix a position the fault point high-efficiently, so that the maintenance.
Drawings
Fig. 1 is a flowchart of a method for detecting a failure in a driving circuit according to a first embodiment of the present application;
fig. 2 is a circuit diagram of a driving circuit of a compressor in an air conditioner according to an embodiment of the present application;
FIG. 3 is a diagram of voltage waveforms developed at the U, V, W interface during normal operation of a driver circuit according to one embodiment of the present application;
FIG. 4 is a voltage vector diagram of a compressor according to one embodiment of the present application; and
fig. 5 is a block diagram illustrating a device for detecting a failure in a driving circuit according to a second embodiment of the present application.
Detailed Description
In order to solve the technical problems in the prior art, the application provides a method and a device for detecting faults of an air conditioner and a driving circuit, which can simply, quickly and efficiently locate fault points without replacing devices and are convenient to maintain.
In order to better understand the above technical solutions, exemplary embodiments of the present application will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the present application are shown in the drawings, it should be understood that the present application may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.
In order to better understand the technical solution, the technical solution will be described in detail with reference to the drawings and the specific embodiments.
Example one
Fig. 1 is a flowchart of a method for detecting a failure in a driving circuit according to a first embodiment of the present application.
In the embodiment of the present application, as shown in fig. 2, a driving circuit of an electric control board of a compressor in an air conditioner is composed of 6 switching tubes, for example, 6 IGBTs (Insulated Gate Bipolar transistors), and the driving circuit is used for driving the compressor, where S1 to S6 represent the 6 switching tubes IGBTs, 6 IGBTs of S1 to S6 are controlled by a main control chip of the electric control board, and a Motor represents the compressor.
Specifically, when the main control chip outputs the PWM signal to control 6 switching tubes, a voltage waveform as shown in fig. 3 is formed on the interface of the 3-way input U, V, W of the compressor, where Vu represents the voltage of the U phase relative to the neutral line, Vv represents the voltage of the V phase relative to the neutral line, Vw represents the voltage of the W phase relative to the neutral line, Vu-V represents the voltage between the U-V two phases, Vv-W represents the voltage between the V-W two phases, and Vw-U represents the voltage between the W-U two phases, as shown in fig. 4.
When the electric control board is damaged, the compressor cannot be driven, and at this time, the reason that the electric control board is damaged may be that 6 paths of PWM driving signals output by the main control chip are abnormal or that 6 switching tubes have faults, so that whether the electric control board has the faults or not can be determined by measuring U, V, W.
As shown in fig. 1, the method for detecting a failure in a driving circuit according to the embodiment of the present application includes the following steps:
and S1, continuously outputting 6 paths of PWM driving signals to corresponding 6 switching tubes.
It can be understood that, in the normal operation mode, if the electronic control board or the compressor has a fault, the electronic control board stops outputting the 6 PWM driving signals after detecting the fault, and at this time, since the 6 switching tubes are not turned on, the voltage between U, V, W is 0.
Specifically, for convenience of measurement, it is necessary to continuously output 6 channels of PWM driving signals, so that the voltage between U, V, W can be kept stable, and therefore, it is necessary to set a detection mode in which the main control chip does not detect the compressor feedback signal, does not determine the compressor fault, and only continuously outputs 6 channels of PWM driving signals to the corresponding 6 switching tubes.
And S2, acquiring the voltage between any two phase output ends of the driving circuit.
In one particular example of the application, the voltage between the U-V, V-W, W-U terminals on the electronic control board can be measured using the alternating voltage range of the multimeter.
And S3, judging whether the driving circuit has faults or not according to the voltage.
In one embodiment of the present application, determining whether a driving circuit fails according to a voltage includes: judging whether the voltage is within a set voltage range; if not, judging that the driving circuit has a fault. The set voltage range can be calibrated according to actual conditions, and can be 150-270V, for example.
Specifically, after voltages Vu-V, Vv-w and Vw-U corresponding to the U-V, V-W, W-U wiring terminals are acquired, each voltage is judged, if the Vu-V, Vv-w and Vw-U are all 150-270V, it is indicated that the 6-path IGBT has output, and the driving circuit of the electric control board has no problem, and if only one of the Vu-V, Vv-w and Vw-U is not 150-270V, it is indicated that the driving circuit of the electric control board has a problem and the electric control board needs to be replaced.
It can be understood that if the driving circuit of the electric control board is normal, it can be determined that the compressor is out of order and needs to be replaced immediately.
Further, in an embodiment of the present application, the method for detecting a failure of a driving circuit further includes: and after detecting that the air conditioner enters the overhaul test mode, executing the step of continuously outputting 6 paths of PWM driving signals to the corresponding 6 switching tubes.
Further, in an embodiment of the present application, the method for detecting a failure of a driving circuit further includes: after receiving an instruction of entering a forced refrigeration mode sent by an indoor unit, detecting the current of a compressor; judging whether the compressor is connected with the driving circuit or not according to the current; if not, the air conditioner is controlled to enter a maintenance test mode.
Preferably, in order to facilitate entering the detection mode, an entry mode is particularly provided. Firstly, the connecting wire of the outdoor compressor is unplugged after power failure, then the power is supplied again, and a command for entering a forced refrigeration mode is sent through a forced key on a main control panel of the indoor unit so as to control the air conditioner to enter the forced refrigeration function. After the outdoor unit receives a command of entering a forced cooling mode sent by the indoor unit, a main control chip of an electric control board of the outdoor unit detects the current of the compressor and judges whether the compressor is connected with the driving circuit or not according to the current, for example, when the current is smaller than a preset current threshold value, the compressor is judged not to be connected with the driving circuit, and at the moment, the air conditioner is considered to enter a maintenance test mode.
After the air conditioner enters the maintenance test mode, the main control chip of the outdoor unit electric control board executes a corresponding program, the driving control mode of the compressor adopts a speed open loop and current closed loop mode, a compressor feedback signal is not detected, the fault of the compressor is not judged, and 6 paths of PWM driving signals are continuously and fixedly output to 6 corresponding switch tubes.
And finally, respectively measuring the voltage between U-V, V-W, W-U wiring terminals on the electric control board by using an alternating voltage gear of the universal meter, judging each voltage, if the voltages Vu-V, Vv-w and Vw-U between the U-V, V-W, W-U wiring terminals are all between 150V and 270V, indicating that 6 switching tubes have output, and a driving circuit of the electric control board has no problem, and if only one of Vu-V, Vv and Vw-U is not between 150V and 270V, indicating that the driving circuit of the electric control board has a problem and needing to be replaced. And if the electric control board is normal, the compressor can be judged to be in fault, and the compressor needs to be replaced immediately.
The technical scheme in the embodiment of the application at least has the following technical effects or advantages:
according to the detection method for the faults of the driving circuit, the 6 paths of PWM driving signals are continuously output to the corresponding 6 switch tubes, the voltage between any two phase output ends of the driving circuit is obtained, whether the driving circuit breaks down or not is judged according to the voltage, and therefore fault points can be simply, quickly and efficiently located under the condition that devices are not replaced, and maintenance is facilitated.
Example two
Fig. 5 is a block diagram illustrating a device for detecting a failure in a driving circuit according to a second embodiment of the present application. As shown in fig. 5, the apparatus for detecting a failure in a driving circuit according to the embodiment of the present application includes: the device comprises an output module 10, an acquisition module 20 and a judgment module 30.
The output module 10 is configured to continuously output 6 channels of PWM driving signals to the corresponding 6 switching tubes, the obtaining module 20 is configured to obtain a voltage between any two phase output ends of the driving circuit, and the determining module 30 is configured to determine whether the driving circuit fails according to the voltage.
In an embodiment of the present application, the determining module 30 is specifically configured to: judging whether the voltage is within a set voltage range; if not, judging that the driving circuit has a fault.
In one embodiment of the present application, a drive circuit is used to drive a compressor of an air conditioner.
In one embodiment of the present application, the output module 10 is further configured to: and after detecting that the air conditioner enters the overhaul test mode, executing the step of continuously outputting 6 paths of PWM driving signals to the corresponding 6 switching tubes.
In one embodiment of the present application, the output module 10 is further configured to: after receiving an instruction of entering a forced refrigeration mode sent by an indoor unit, detecting the current of a compressor; judging whether the compressor is connected with the driving circuit or not according to the current; if not, the air conditioner is controlled to enter a maintenance test mode.
The technical scheme in the embodiment of the application at least has the following technical effects or advantages:
the detection device for the driving circuit fault of the embodiment of the application continuously outputs 6 paths of PWM driving signals to corresponding 6 switch tubes, obtains the voltage between any two phase output ends of the driving circuit, judges whether the driving circuit has the fault according to the voltage, and can simply, quickly and efficiently position the fault point under the condition of not replacing a device so as to be convenient for maintenance.
Since the apparatus described in the second embodiment of the present application is an apparatus used for implementing the method described in the first embodiment of the present application, a person skilled in the art can understand the specific structure and the variation of the system based on the method described in the first embodiment of the present application, and thus the detailed description is omitted here. All the devices adopted in the method of the first embodiment of the present application belong to the protection scope of the present application.
Based on the above embodiment, the present application further provides an air conditioner corresponding to the second apparatus in the second embodiment, which includes the second apparatus for detecting a failure in the driving circuit.
The air conditioner of the embodiment of the application can simply, quickly and efficiently locate the fault point under the condition of not replacing the device through the detection device of the fault of the driving circuit, so that the maintenance is convenient.
In addition, an embodiment of the present application further provides an electronic device, including: the detection method for the driving circuit faults is realized when the processor executes the program.
According to the electronic equipment provided by the embodiment of the application, the fault point can be simply, quickly and efficiently positioned under the condition of not replacing a device by executing the method for detecting the fault of the driving circuit, so that the electronic equipment is convenient to maintain.
In addition, an embodiment of the present application further provides a computer-readable storage medium, on which a computer program is stored, where the computer program is executed by a processor to implement the method for detecting a failure of a driving circuit.
The computer-readable storage medium of the embodiment of the application can simply, quickly and efficiently locate the fault point without replacing a device by executing the detection method of the driving circuit fault, so as to facilitate maintenance.
As will be appreciated by one skilled in the art, embodiments of the present application may be provided as a method, system, or computer program product. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present application may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.
The present application is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the application. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
It should be noted that in the claims, any reference signs placed between parentheses shall not be construed as limiting the claim. The word "comprising" does not exclude the presence of elements or steps not listed in a claim. The word "a" or "an" preceding an element does not exclude the presence of a plurality of such elements. The application can be implemented by means of hardware comprising several distinct elements, and by means of a suitably programmed computer. In the unit claims enumerating several means, several of these means may be embodied by one and the same item of hardware. The usage of the words first, second and third, etcetera do not indicate any ordering. These words may be interpreted as names.
While the preferred embodiments of the present application have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. Therefore, it is intended that the appended claims be interpreted as including preferred embodiments and all alterations and modifications as fall within the scope of the application.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present application without departing from the spirit and scope of the application. Thus, if such modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application is intended to include such modifications and variations as well.
Claims (9)
1. A method for detecting a failure in a driver circuit, comprising:
after the power is cut off, the connecting line between the compressor and the driving circuit is pulled out, and the power is supplied again;
after receiving an instruction of entering a forced cooling mode sent by an indoor unit, detecting the current of the compressor;
judging whether the compressor is connected with the driving circuit or not according to the current;
if not, controlling the air conditioner to enter a maintenance test mode;
after detecting that the air conditioner enters a maintenance test mode, continuously and fixedly outputting 6 paths of PWM driving signals to corresponding 6 switching tubes in a speed open loop and current closed loop mode;
acquiring voltage between any two phase output ends of the driving circuit;
and judging whether the driving circuit has faults or not according to the voltage.
2. The method according to claim 1, wherein said determining whether the driving circuit is faulty according to the voltage comprises:
judging whether the voltage is within a set voltage range;
if not, judging that the driving circuit has a fault.
3. The detection method according to claim 1, wherein the driving circuit is used for driving a compressor of an air conditioner.
4. A device for detecting a failure in a drive circuit, comprising:
the output module is used for unplugging a connecting wire between the compressor and the driving circuit after a user is powered off, detecting the current of the compressor after receiving a command of entering a forced refrigeration mode sent by an indoor unit after the power is turned on again, judging whether the compressor is connected with the driving circuit or not according to the current, controlling the air conditioner to enter a maintenance test mode if the current of the compressor is not detected, and continuously and fixedly outputting 6 paths of PWM driving signals to corresponding 6 switching tubes after the air conditioner is detected to enter the maintenance test mode;
the acquisition module is used for acquiring the voltage between any two phase output ends of the driving circuit;
and the judging module is used for judging whether the driving circuit has faults or not according to the voltage.
5. The detection apparatus according to claim 4, wherein the determination module is specifically configured to:
judging whether the voltage is within a set voltage range;
if not, judging that the driving circuit has a fault.
6. The detection device of claim 4, wherein the drive circuit is configured to drive a compressor of an air conditioner.
7. An air conditioner, comprising: a device for detecting a malfunction of a drive circuit according to any one of claims 4 to 6.
8. An electronic device, comprising: memory, processor and computer program stored on said memory and executable on said processor, said processor implementing a method of detection of a failure of a drive circuit according to any of claims 1-3 when executing said program.
9. A computer-readable storage medium, on which a computer program is stored, which, when being executed by a processor, carries out a method of detecting a failure of a drive circuit according to any one of claims 1 to 3.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910227242.7A CN109945396B (en) | 2019-03-25 | 2019-03-25 | Air conditioner, and detection method and detection device for driving circuit fault |
| PCT/CN2019/109590 WO2020192076A1 (en) | 2019-03-25 | 2019-09-30 | Air conditioner, air conditioner detection device, and method for detecting fault in drive circuit |
| JP2021556514A JP7263541B2 (en) | 2019-03-25 | 2019-09-30 | AIR CONDITIONER, DETECTION DEVICE FOR AIR CONDITIONER AND METHOD FOR DETECTING FAILURE OF DRIVE CIRCUIT |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910227242.7A CN109945396B (en) | 2019-03-25 | 2019-03-25 | Air conditioner, and detection method and detection device for driving circuit fault |
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| Publication Number | Publication Date |
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| CN109945396A CN109945396A (en) | 2019-06-28 |
| CN109945396B true CN109945396B (en) | 2021-10-26 |
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| CN201910227242.7A Active CN109945396B (en) | 2019-03-25 | 2019-03-25 | Air conditioner, and detection method and detection device for driving circuit fault |
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| JP (1) | JP7263541B2 (en) |
| CN (1) | CN109945396B (en) |
| WO (1) | WO2020192076A1 (en) |
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| CN109945396B (en) * | 2019-03-25 | 2021-10-26 | 广东美的制冷设备有限公司 | Air conditioner, and detection method and detection device for driving circuit fault |
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2019
- 2019-03-25 CN CN201910227242.7A patent/CN109945396B/en active Active
- 2019-09-30 WO PCT/CN2019/109590 patent/WO2020192076A1/en active Application Filing
- 2019-09-30 JP JP2021556514A patent/JP7263541B2/en active Active
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| WO2020192076A1 (en) | 2020-10-01 |
| CN109945396A (en) | 2019-06-28 |
| JP2022525667A (en) | 2022-05-18 |
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