CN109974196B - Frequency converter set communication control method and device and frequency converter set system - Google Patents
Frequency converter set communication control method and device and frequency converter set system Download PDFInfo
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- CN109974196B CN109974196B CN201910274462.5A CN201910274462A CN109974196B CN 109974196 B CN109974196 B CN 109974196B CN 201910274462 A CN201910274462 A CN 201910274462A CN 109974196 B CN109974196 B CN 109974196B
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- 238000004891 communication Methods 0.000 title claims abstract description 406
- 238000000034 method Methods 0.000 title claims abstract description 37
- 238000006243 chemical reaction Methods 0.000 claims abstract description 81
- 238000011084 recovery Methods 0.000 claims description 5
- 238000010438 heat treatment Methods 0.000 description 9
- 238000012545 processing Methods 0.000 description 8
- 238000012423 maintenance Methods 0.000 description 5
- 238000005057 refrigeration Methods 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 238000001816 cooling Methods 0.000 description 2
- 230000003247 decreasing effect Effects 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
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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
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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
- F24F11/50—Control or safety arrangements characterised by user interfaces or communication
- F24F11/56—Remote control
- F24F11/58—Remote control using Internet communication
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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
- F24F11/50—Control or safety arrangements characterised by user interfaces or communication
- F24F11/61—Control or safety arrangements characterised by user interfaces or communication using timers
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Abstract
The application relates to a communication control method and device of a frequency converter unit and a frequency converter unit system, when a communication fault occurs between an outer unit main control board and an outer unit drive board of the frequency converter unit, the outer unit drive board judges whether the communication fault can be recovered, when the communication fault cannot be recovered, the communication connection between a sensing device and the outer unit drive board and the communication connection between the inner unit main board and the outer unit drive board are established, so that the inner unit main board directly communicates with the outer unit drive board, the outer unit drive board can output a fixed-frequency control signal under the control of the inner unit main board, and the frequency converter unit can continuously operate. According to the frequency conversion unit communication control method, the frequency conversion unit communication control device and the frequency conversion unit system, when a fault occurs between an outer unit main control board and an outer unit drive board of the frequency conversion unit, the mode is directly converted into the fixed-frequency operation mode to ensure that the unit continuously operates, the non-stop control of the frequency conversion unit is realized, and the frequency conversion unit has higher working reliability compared with the traditional frequency conversion unit.
Description
Technical Field
The application relates to the technical field of air conditioners, in particular to a communication control method and device for a frequency converter unit and a frequency converter unit system.
Background
An air conditioner is a device that provides a comfortable living environment to people by adjusting air temperature, humidity, air flow rate, and the like. According to different output powers, the air conditioner unit can be divided into a frequency conversion unit and a fixed frequency unit. The outdoor unit of the frequency conversion unit is provided with an outdoor unit main control board and an outdoor unit drive board, and after the outdoor unit drive board receives a starting instruction and a frequency increasing and decreasing instruction sent by the outdoor unit main control board, a fan and a compressor of the air conditioner are controlled to start and operate at a given rotating speed, so that the frequency conversion control of the air conditioner is realized.
With the continuous maturity of the inverter technology, the use of the inverter air conditioner is gradually increasing, and the failure rate of the inverter air conditioner obtained by analyzing the data acquired by the GPRS (general packet Radio Service) big data is also increasing. In traditional frequency conversion unit, when outer quick-witted main control panel and outer quick-witted drive plate take place communication failure, corresponding lift frequency signal can't send outer quick-witted drive plate, and frequency conversion unit will shut down the processing, until troubleshooting. Therefore, the traditional frequency converter set has the defect of poor working reliability.
Disclosure of Invention
Therefore, it is necessary to provide a method and a device for controlling communication of a frequency converter unit and a frequency converter unit system, aiming at the problem that the conventional frequency converter unit is poor in working reliability.
A communication control method for a frequency converter set comprises the following steps: when a communication fault occurs between the frequency conversion unit and an outer unit main control board, judging whether the communication fault can be recovered; if not, the frequency converter is in communication connection with a sensing device of the frequency converter set and is in communication connection with an inner machine mainboard of the frequency converter set, so that a fixed-frequency control signal can be output under the control of the inner machine mainboard, and fixed-frequency operation of the frequency converter set is realized.
In one embodiment, after the step of determining whether the communication failure can be recovered when the communication failure occurs between the external unit main control board and the frequency converter set, the method further includes: and if so, waiting for the communication fault recovery between the main control board of the outdoor unit and the main control board of the outdoor unit.
In one embodiment, before the step of determining whether the communication failure can be recovered when the communication failure occurs between the external unit main control board and the frequency converter set, the method further includes: when a communication signal sent by an outdoor unit main control board of the frequency conversion unit is received, timing is started with a preset time length; and if the communication signal sent by the outer machine main control board is not received again within the preset time, a communication fault occurs between the communication signal and the outer machine main control board.
In an embodiment, the step of determining whether the communication fault can be recovered when the communication fault occurs between the frequency converter set and an external unit main control board of the frequency converter set includes: when a communication fault occurs between the frequency converter set and an outer machine main control board, acquiring corresponding communication fault information; and obtaining a communication fault type according to the communication fault information and judging whether the communication fault type is that a communication signal is interfered.
In one embodiment, after the step of obtaining the corresponding communication fault information when a communication fault occurs between the external unit main control board and the frequency converter set, the method further includes: and sending the communication fault information to a remote server and storing the communication fault information.
A frequency converter unit communication control apparatus, the apparatus comprising: the communication fault judgment module is used for judging whether the communication fault can be recovered or not when the communication fault occurs between the communication fault judgment module and an outer machine main control board of the frequency conversion unit; and the communication line switching module is used for being in communication connection with the sensing device of the frequency converter set and the inner machine mainboard of the frequency converter set when the communication fault cannot be recovered, so that a fixed-frequency control signal can be output under the control of the inner machine mainboard, and the fixed-frequency operation of the frequency converter set is realized.
A frequency converter assembly system, comprising: the frequency converter comprises an inner machine main board, an outer machine main control board, an outer machine drive board and a sensing device, wherein the inner machine main board, the outer machine main control board and the outer machine drive board are respectively used for connecting an external alternating-current power supply, the outer machine main control board is used for cutting off communication connection between the inner machine main board and the outer machine main control board and cutting off communication connection between the sensing device and the outer machine main control board when communication faults occur between the outer machine main control board and the outer machine drive board, and the outer machine drive board is used for carrying out communication control on the frequency converter according to the method when communication faults occur between the outer machine main control board and the outer machine main control board.
In one embodiment, the system further includes a first switch device, a second switch device, a third switch device and a fourth switch device, the inner machine main board is in communication connection with the outer machine main control board through the first switch device, the outer machine main control board is in communication connection with the outer machine drive board through the second switch device, the outer machine main control board is in communication connection with the sensing device through the third switch device, and the inner machine main board is in communication connection with the outer machine drive board through the fourth switch device.
In one embodiment, the first switching device and the third switching device are both normally-closed relays, and the second switching device and the fourth switching device are both normally-open relays.
In one embodiment, the system further comprises a fan and a compressor, the fan and the compressor being respectively connected to the outer machine drive plate.
According to the frequency converter set communication control method, the frequency converter set communication control device and the frequency converter set system, when communication faults occur between an outer machine main control board and an outer machine drive board of the frequency converter set, the outer machine drive board judges whether the communication faults can be recovered or not, when the communication faults can not be recovered, communication connection between a sensing device and the outer machine drive board and communication connection between the inner machine main board and the outer machine drive board are established, so that the inner machine main board is directly communicated with the outer machine drive board, the outer machine drive board can output fixed-frequency control signals under the control of the inner machine main board, and the frequency converter set can continuously operate. According to the frequency conversion unit communication control method, the frequency conversion unit communication control device and the frequency conversion unit system, when a fault occurs between an outer unit main control board and an outer unit drive board of the frequency conversion unit, the mode is directly converted into the fixed-frequency operation mode to ensure that the unit continuously operates, the non-stop control of the frequency conversion unit is realized, and the frequency conversion unit has higher working reliability compared with the traditional frequency conversion unit.
Drawings
FIG. 1 is a schematic flow chart illustrating a control method of a frequency converter set according to an embodiment;
FIG. 2 is a schematic flow chart of a control method of a frequency converter set in another embodiment;
FIG. 3 is a schematic flow chart of a control method of a frequency converter set according to another embodiment;
FIG. 4 is a schematic flow chart illustrating a control method of a frequency converter set according to still another embodiment;
FIG. 5 is a schematic structural diagram of a control device of a frequency converter set according to an embodiment;
FIG. 6 is a schematic structural diagram of a control device of a frequency converter set in another embodiment;
FIG. 7 is a schematic diagram of a system of a frequency converter set according to an embodiment;
FIG. 8 is a schematic structural diagram of a frequency converter set system in another embodiment;
fig. 9 is a flowchart of a method for controlling a frequency converter set in an embodiment.
Detailed Description
To facilitate an understanding of the present application, the present application will now be described more fully with reference to the accompanying drawings. Preferred embodiments of the present application are illustrated in the accompanying drawings. This application may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.
Referring to fig. 1, a communication control method for a frequency converter set includes steps S300 and S400. And step S300, when a communication fault occurs between the frequency converter set and an external machine main control board, judging whether the communication fault can be recovered.
Specifically, the frequency converter set mainly comprises an outer unit and an inner unit, wherein the outer unit comprises an outer unit main control board and an outer unit driving board. And the outer machine main control board is connected with the sensing device and used for processing the logic of the sensor so as to control the stable operation of the frequency conversion unit. The external machine driving board is used for receiving a starting-up instruction, a frequency increasing and decreasing instruction and the like sent by the external machine main control board, so that starting-up operation of the external machine driving board is achieved, or a corresponding device is driven to operate according to a given frequency, and frequency conversion operation of the frequency conversion unit is achieved. The variable frequency operation means that the rotating speed of a compressor or a fan and the like driven by an outer machine driving plate can be adjusted under the control of an outer machine main control plate, so that when the variable frequency unit is applied to an air conditioner, the refrigerating capacity or the heating capacity of the air conditioner can be adjusted. For example, when the air conditioner is just started, due to the reason that the difference between the indoor temperature and the target temperature of the air conditioner is large and the like, the outer unit main control board controls the outer unit drive board to output large power, controls the compressor and the fan to operate at high speed and is in a high-frequency operation state, and can realize quick refrigeration or heating.
Because the reason for the communication fault between the main control board and the driving board of the external unit is not unique, some communication faults can be gradually recovered along with the increase of communication time, and some communication faults are generated due to the damage of communication devices, and the communication faults of the type can be solved only by replacing the communication devices. Therefore, when a communication fault occurs between the external machine mainboard and the external machine drive board, the external machine drive board firstly judges that the communication fault can be recovered, so that different operations can be executed according to different communication fault types, and the frequency converter set can be ensured to operate without stopping under different communication faults.
And S400, if not, the frequency converter is in communication connection with a sensing device of the frequency converter set and is also in communication connection with an inner machine mainboard of the frequency converter set, so that a fixed-frequency control signal can be output under the control of the inner machine mainboard, and fixed-frequency operation of the frequency converter set is realized.
Specifically, when the communication failure between the outer machine main control board and the outer machine drive board cannot be recovered, the frequency up-down command of the outer machine main control board and the like cannot be transmitted to the outer machine drive board, and the whole frequency conversion unit cannot perform frequency conversion operation. The biggest difference between the fixed-frequency unit and the variable-frequency unit is that an outer unit main control board is not arranged in an outer unit of the fixed-frequency unit, and a fixed-frequency instruction is directly sent to the outer unit main control board by an inner unit main board, so that the fixed-frequency operation of the unit is realized, and the possibility of communication failure between the outer unit main control board and an outer unit drive board can be avoided. Therefore, when a communication fault occurs between the outer machine main control board and the outer machine drive board of the frequency conversion unit, the frequency conversion control scheme can be converted into a fixed frequency control scheme similar to the fixed frequency unit, so that the frequency conversion unit is prevented from being stopped due to the fault when the communication fault occurs, and the comfort level of a user and the user experience are effectively improved. Therefore, when the communication between the outer machine main control board and the outer machine drive board of the frequency converter set fails, the communication connection between the inner machine main board and the outer machine drive board and the communication connection between the sensing device and the outer machine drive board can be established through the outer machine drive board, and the fixed frequency control scheme of the frequency converter set is realized.
When the operation is switched to the fixed-frequency operation, the outer machine driving plate outputs a fixed-frequency control signal under the control of the inner machine mainboard, and the compressor and the fan connected with the outer machine driving plate are controlled to operate at a fixed rotating speed, namely, the frequency conversion unit is controlled to realize the fixed-frequency operation. By the control method, the frequency converter set cannot be shut down due to communication faults, the non-shut-down operation control of the frequency converter set is realized, and the influence on the use experience of a user caused by sudden interruption of refrigeration or heating in the refrigeration or heating process is avoided. It should be noted that the sensing device includes a plurality of sensors, and each sensor is connected with outer quick-witted main control panel, sends the corresponding data that obtain to outer quick-witted main control panel and carries out analysis processes. For example, the temperature sensor, the pressure sensor and the like, and the outer machine main control board controls the stable and safe operation of the whole frequency conversion unit through the environmental temperature data collected by the temperature sensor, the pressure data collected by the pressure sensor and the like.
It should be noted that, in an embodiment, the outer unit main control board of the inverter unit further has a function of detecting whether a communication failure occurs between the outer unit main control board and the outer unit drive board, and when the outer unit main control board detects the communication failure, the outer unit main control board will cut off the communication connection between the outer unit main control board and the inner unit main board, and at the same time, cut off the communication connection between the sensing device and the outer unit main control board, so as to ensure that the newly-built signal channel of the outer unit drive board (i.e., the signal channel directly realizing the fixed-frequency operation through the inner unit main board) can.
In order to facilitate the disconnection and connection of communication connections between the devices in the frequency converter set, in one embodiment, switching devices are disposed between an inner unit main board and an outer unit main control board of the frequency converter set, between the outer unit main control board and a sensing device, between an outer unit drive board and the sensing device, and between the outer unit drive board and the inner unit main board. When no communication fault occurs between the outer machine main control board and the outer machine drive board, the switch device between the inner machine main board and the outer machine main control board and the switch device between the sensing device and the outer machine main control board are both closed, the switch device between the inner machine main board and the outer machine drive board and the switch device between the sensing device and the outer machine drive board are both in a disconnected state, and at the moment, the outer machine drive board can normally receive the frequency conversion control signal sent by the outer machine main control board, so that the frequency conversion operation control operation of the frequency conversion unit can be realized. When a communication fault occurs between the outer machine main control board and the outer machine drive board, the switch device between the inner machine main board and the outer machine main control board and the switch device between the sensing device and the outer machine main control board are disconnected, and meanwhile, the switch device between the inner machine main board and the outer machine drive board and the switch device between the sensing device and the outer machine drive board are controlled to be closed, so that the frequency converter unit is controlled to perform a fixed-frequency operation mode, and the non-stop operation of the frequency converter unit is ensured. It can be understood that, in other embodiments, other manners may be adopted to perform the control operation of the communication connection between the devices, as long as it is ensured that when a communication failure occurs between the main control board of the external unit and the drive board of the external unit, the frequency converter unit is switched to the constant-frequency operation in time, so as to maintain the continuous operation of the frequency converter unit.
In one embodiment, referring to fig. 2, step S500 is further included after step S400. And step S500, if yes, waiting for the communication fault between the main control board of the outdoor unit and the outdoor unit to recover.
Specifically, when the communication fault between the outer machine main control board and the outer machine drive board belongs to a recoverable communication fault type, the outer machine drive board cannot establish communication connection with the inner machine main board and communication connection with the sensing device, and the frequency converter unit enters a state of waiting for communication recovery until the communication fault between the outer machine main control board and the outer machine drive board recovers, and the frequency converter unit continues to realize a frequency conversion operation function. It should be noted that in one embodiment, the recoverable communication failure is a communication signal interference, and the communication signal interference is eliminated by waiting for a certain period of time. It can be understood that, in an embodiment, a certain time duration may also be set as the waiting time duration, if the detected communication fault is a fault caused by interference of the communication signal, the preset waiting time duration is used for timing, and if the communication between the external unit main control board and the external unit drive board is restored within the preset waiting time duration, the frequency conversion unit continues to be controlled to perform the frequency conversion operation. If the preset waiting time is over, the communication fault is still not recovered, and at the moment, the outer machine main control board disconnects the communication connection between the outer machine main control board and the sensing device and between the outer machine main control board and the inner machine main board, and performs fixed-frequency control operation.
In one embodiment, referring to fig. 3, step S300 further includes step S100 and step S200. And S100, when a communication signal sent by an outdoor unit main control board of the frequency conversion unit is received, timing is started according to a preset time length.
Specifically, when the external unit drive board determines whether a communication failure occurs between the external unit drive board and the external unit main control board, the external unit drive board determines according to the received communication signal sent by the external unit main control board. The communication between the outer machine main control board and the outer machine drive board is real-time, and if the communication between the outer machine main control board and the outer machine drive board fails, the outer machine drive board cannot receive the communication signal of the outer machine drive board. The type of the communication signal is not unique, and all information sent when the outer unit main control board communicates with the outer unit drive board, such as a power-on command, a frequency-up/down command and the like, can be used as the communication signal. In this embodiment, in order to detect whether a communication fault occurs between the outer unit main control board and the outer unit drive board, every time the outer unit drive board receives a communication signal of the outer unit main control board, timing is started with a preset time length, and if the communication signal sent by the outer unit main control board is received again within the preset time length, it is indicated that no communication fault occurs, the timing is cleared, and timing is started with the preset time length at a time point when the communication signal is received again. It should be noted that the preset time length is not set uniquely, and different sizes and preset time lengths can be set according to different types of frequency converter units. For example, in one embodiment, the preset duration is 30 seconds.
And step S200, if the communication signal sent by the outer unit main control board is not received again within the preset time, a communication fault occurs between the main control board and the outer unit.
Specifically, when the communication signal sent by the outer machine main control board is not received again by the inner machine drive board within the preset time, it is indicated that a communication fault occurs between the outer machine main control board and the outer machine drive board at this time, and corresponding fault information needs to be acquired at this time, so that the fault type can be judged and subsequent maintenance operation can be performed conveniently. It can be understood that in other embodiments, whether the communication fault occurs between the outer machine main control board and the outer machine drive board can be judged by judging whether the fault information is acquired, and the outer machine main control board and the outer machine drive board can be timely known as long as the fault information occurs between the outer machine main control board and the outer machine drive board.
In one embodiment, referring to fig. 4, step S300 includes step S310 and step S320. And S310, when a communication fault occurs between the frequency converter set and an external machine main control board, acquiring corresponding communication fault information.
Specifically, when a communication fault occurs between the external machine main control board and the external machine drive board, the external machine drive board first acquires corresponding fault information. The fault information is information representing the type of communication fault between the external unit drive board and the external unit main control board, and the specific form is not unique. For example, in one embodiment, the fault information is transmitted in the frequency converter set according to the type of the fault code, different fault codes represent different fault types, and the fault code when the communication fault occurs between the main control board of the external unit and the drive board of the external unit is acquired, so that the fault type can be analyzed and processed to obtain the corresponding fault type. It can be understood that the acquisition of the fault information can be performed through the inner machine main board, or can be performed through the outer machine main control board, or the inner machine main board and the outer machine main control board can both acquire the corresponding fault information, as long as the corresponding communication line switching operation can be realized through the fault information.
Step S320, obtaining a communication fault type according to the communication fault information and determining whether the communication fault type is that the communication signal is interfered.
After the fault information is obtained, the fault information is analyzed to obtain a fault type corresponding to the fault information, so that subsequent communication line switching operation can be realized according to the fault type. It can be understood that there are various types of fault types, and corresponding communication chips are respectively arranged in the external machine drive board and the external machine main control board to realize communication operation, and the communication chips are connected through a communication line. Therefore, when a communication fault occurs between the outer unit main control board and the outer unit drive board, the fault type may include a communication chip fault and a communication line fault, and the communication line fault may be classified into two cases, i.e., a communication line is damaged or a communication signal is interfered.
When the type of the fault with the communication fault is a communication chip fault, the communication fault belongs to an unrecoverable communication fault, and the communication chip needs to be replaced to recover the communication between the outer unit main control board and the outer unit drive board, so that the communication connection between the inner unit main control board and the outer unit main control board is directly cut off, and meanwhile, the communication connection between the sensing device and the outer unit main control board is cut off, so that the communication line can be switched.
When the communication fault is a communication line fault, the communication line fault and the communication signal are interfered, the communication line fault and the communication chip fault are similar and belong to unrecoverable fault types, and the communication line needs to be replaced to enable the outer machine main control board to communicate with the outer machine driving board. At the moment, the outer machine main control board directly cuts off the communication connection between the outer machine main control board and the inner machine main board and the communication connection between the outer machine main control board and the sensing device, so that the fixed frequency control operation of the frequency conversion unit is realized. And the condition that the communication signal is interfered belongs to a recoverable fault type, the device does not need to be replaced, and when the interference source is shielded or does not exist, the communication between the main control board of the outdoor unit and the driving board of the outdoor unit can be recovered. Therefore, when the communication fault type is a communication line fault, whether the communication fault can be recovered or not is judged, and the operation reliability of the communication control method of the frequency converter set is effectively enhanced.
In one embodiment, referring to fig. 4, step S330 is further included after step S310. And step S330, transmitting the communication fault information to a remote server and storing the communication fault information.
Specifically, when a communication fault occurs between the outer machine main control board and the outer machine drive board, the outer machine main control board or the outer machine drive board sends the fault information to the remote server for storage after acquiring the fault information, so that after-sales personnel can timely acquire the frequency conversion unit with the fault and the fault type through the remote server, and accordingly timely make corresponding processing. It should be noted that, in an embodiment, a GPRS module is disposed on the inverter unit, and after an external unit main control board or an external unit drive board of the inverter unit obtains communication fault information of the inverter unit, the GPRS module can send corresponding fault information to a remote server for storage, so that after-sales personnel can perform maintenance processing in time. It can be understood that no matter the communication chip is damaged or the fault of the communication line can be sent to the remote server through the GPRS module for storage, so that the frequency converter set can be maintained and processed in time according to fault information, and the frequency converter set has the advantage of convenience in maintenance.
According to the frequency converter set communication control method, when a communication fault occurs between an outer machine main control board and an outer machine drive board of the frequency converter set, the outer machine drive board judges whether the communication fault can be recovered or not, when the communication fault cannot be recovered, communication connection between a sensing device and the outer machine drive board and communication connection between an inner machine mainboard and the outer machine drive board are established, so that the inner machine mainboard is directly communicated with the outer machine drive board, the outer machine drive board can output a fixed-frequency control signal under the control of the inner machine mainboard, and the frequency converter set can be ensured to continuously operate. According to the communication control method of the frequency conversion unit, when a fault occurs between an outer unit main control board and an outer unit drive board of the frequency conversion unit, the constant-frequency operation mode can be directly converted to ensure that the unit continuously operates, the non-stop control of the frequency conversion unit is realized, and the communication control method of the frequency conversion unit has higher working reliability compared with the traditional frequency conversion unit.
Referring to fig. 5, a communication control apparatus for a frequency converter set includes a communication failure determination module 300 and a communication line switching module 400.
The communication failure determination module 300 is configured to determine whether a communication failure can be recovered when a communication failure occurs between the communication failure and an external unit main control board of the frequency converter set.
Specifically, because the cause of the communication failure between the main control board and the driving board of the external unit is not unique, some communication failures can be gradually recovered along with the increase of communication time, and some communication failures are generated due to the damage of the communication device, and the communication failures can be solved only by replacing the communication device. Therefore, when a communication fault occurs between the external machine mainboard and the external machine drive board, the external machine drive board firstly judges that the communication fault can be recovered, so that different operations can be executed according to different communication fault types, and the frequency converter set can be ensured to operate without stopping under different communication faults.
The communication line switching module 400 is used for being in communication connection with the sensing device of the frequency converter set and being in communication connection with the inner machine mainboard of the frequency converter set when the communication fault cannot be recovered, so that a fixed-frequency control signal can be output under the control of the inner machine mainboard, and fixed-frequency operation of the frequency converter set is realized.
Specifically, when the communication failure between the outer machine main control board and the outer machine drive board cannot be recovered, the frequency up-down command of the outer machine main control board and the like cannot be transmitted to the outer machine drive board, and the whole frequency conversion unit cannot perform frequency conversion operation. The biggest difference between the fixed-frequency unit and the variable-frequency unit is that an outer unit main control board is not arranged in an outer unit of the fixed-frequency unit, and a fixed-frequency instruction is directly sent to the outer unit main control board by an inner unit main board, so that the fixed-frequency operation of the unit is realized, and the possibility of communication failure between the outer unit main control board and an outer unit drive board can be avoided. Therefore, when a communication fault occurs between the outer machine main control board and the outer machine drive board of the frequency conversion unit, the frequency conversion control scheme can be converted into a fixed frequency control scheme similar to the fixed frequency unit, so that the frequency conversion unit is prevented from being stopped due to the fault when the communication fault occurs, and the comfort level of a user and the user experience are effectively improved. Therefore, when the communication between the outer machine main control board and the outer machine drive board of the frequency converter set fails, the communication connection between the inner machine main board and the outer machine drive board and the communication connection between the sensing device and the outer machine drive board can be established through the outer machine drive board, and the fixed frequency control scheme of the frequency converter set is realized.
In one embodiment, the communication line switching module 400 is further configured to wait for the communication failure with the outer unit main control board to be recovered when the communication failure can be recovered.
Specifically, when the communication fault between the outer machine main control board and the outer machine drive board belongs to a recoverable communication fault type, the outer machine drive board cannot establish communication connection with the inner machine main board and communication connection with the sensing device, and the frequency converter unit enters a state of waiting for communication recovery until the communication fault between the outer machine main control board and the outer machine drive board recovers, and the frequency converter unit continues to realize a frequency conversion operation function.
Referring to fig. 6, the communication control apparatus of the frequency converter set further includes a timing module 100 and a communication fault detection module 200. The timing module 100 is configured to start timing with a preset duration when receiving a communication signal sent by an external unit main control board of the frequency converter set.
Specifically, when the external unit drive board determines whether a communication failure occurs between the external unit drive board and the external unit main control board, the external unit drive board determines according to the received communication signal sent by the external unit main control board. The communication between the outer machine main control board and the outer machine drive board is real-time, and if the communication between the outer machine main control board and the outer machine drive board fails, the outer machine drive board cannot receive the communication signal of the outer machine drive board. The type of the communication signal is not unique, and all information sent when the outer unit main control board communicates with the outer unit drive board, such as a power-on command, a frequency-up/down command and the like, can be used as the communication signal. In this embodiment, in order to detect whether a communication fault occurs between the outer unit main control board and the outer unit drive board, every time the outer unit drive board receives a communication signal of the outer unit main control board, timing is started with a preset time length, and if the communication signal sent by the outer unit main control board is received again within the preset time length, it is indicated that no communication fault occurs, the timing is cleared, and timing is started with the preset time length at a time point when the communication signal is received again.
The communication fault detection module 200 is configured to cause a communication fault with the outer unit main control board if the communication signal sent by the outer unit main control board is not received again within the preset time period.
Specifically, when the communication signal sent by the outer machine main control board is not received again by the inner machine drive board within the preset time, it is indicated that a communication fault occurs between the outer machine main control board and the outer machine drive board at this time, and corresponding fault information needs to be acquired at this time, so that the fault type can be judged and subsequent maintenance operation can be performed conveniently. It can be understood that in other embodiments, whether the communication fault occurs between the outer machine main control board and the outer machine drive board can be judged by judging whether the fault information is acquired, and the outer machine main control board and the outer machine drive board can be timely known as long as the fault information occurs between the outer machine main control board and the outer machine drive board.
In one embodiment, the communication failure determining module 300 is further configured to obtain corresponding communication failure information when a communication failure occurs between the communication failure and an external unit main control board of the frequency converter set; and obtaining a communication fault type according to the communication fault information and judging whether the communication fault type is that the communication signal is interfered.
Specifically, when a communication fault occurs between the external machine main control board and the external machine drive board, the external machine drive board first acquires corresponding fault information. The fault information is information representing the type of communication fault between the external unit drive board and the external unit main control board, and the specific form is not unique. For example, in one embodiment, the fault information is transmitted in the frequency converter set according to the type of the fault code, different fault codes represent different fault types, and the fault code when the communication fault occurs between the main control board of the external unit and the drive board of the external unit is acquired, so that the fault type can be analyzed and processed to obtain the corresponding fault type.
After the fault information is obtained, the fault information is analyzed to obtain a fault type corresponding to the fault information, so that subsequent communication line switching operation can be realized according to the fault type. It can be understood that there are various types of fault types, and corresponding communication chips are respectively arranged in the external machine drive board and the external machine main control board to realize communication operation, and the communication chips are connected through a communication line. Therefore, when a communication fault occurs between the outer unit main control board and the outer unit drive board, the fault type may include a communication chip fault and a communication line fault, and the communication line fault may be classified into two cases, i.e., a communication line is damaged or a communication signal is interfered.
When the type of the fault with the communication fault is a communication chip fault, the communication fault belongs to an unrecoverable communication fault, and the communication chip needs to be replaced to recover the communication between the outer unit main control board and the outer unit drive board, so that the communication connection between the inner unit main control board and the outer unit main control board is directly cut off, and meanwhile, the communication connection between the sensing device and the outer unit main control board is cut off, so that the communication line can be switched.
When the communication fault is a communication line fault, the communication line fault and the communication signal are interfered, the communication line fault and the communication chip fault are similar and belong to unrecoverable fault types, and the communication line needs to be replaced to enable the outer machine main control board to communicate with the outer machine driving board. At the moment, the outer machine main control board directly cuts off the communication connection between the outer machine main control board and the inner machine main board and the communication connection between the outer machine main control board and the sensing device, so that the fixed frequency control operation of the frequency conversion unit is realized. And the communication signal is interfered, the device does not need to be replaced, and when the interference source is shielded or does not exist, the communication between the outer machine main control board and the outer machine driving board can be recovered. Therefore, when the communication fault type is a communication line fault, whether the communication fault can be recovered or not is judged, and the operation reliability of the communication control method of the frequency converter set is effectively enhanced.
In one embodiment, the communication failure determination module 300 is further configured to send and store communication failure information to a remote server. Specifically, when a communication fault occurs between the outer machine main control board and the outer machine drive board, the outer machine main control board or the outer machine drive board sends the fault information to the remote server for storage after acquiring the fault information, so that after-sales personnel can timely acquire the frequency conversion unit with the fault and the fault type through the remote server, and accordingly timely make corresponding processing. It should be noted that, in an embodiment, a GPRS module is disposed on the inverter unit, and after an external unit main control board or an external unit drive board of the inverter unit obtains communication fault information of the inverter unit, the GPRS module can send corresponding fault information to a remote server for storage, so that after-sales personnel can perform maintenance processing in time.
Above-mentioned frequency converter unit communication control device, when the communication trouble takes place between the outer quick-witted main control panel of frequency converter unit and the outer quick-witted drive plate, judge whether communication trouble can resume, when communication trouble can not resume, establish communication connection between sensing device and the outer quick-witted drive plate and the communication connection between inner machine mainboard and the outer quick-witted drive plate for the direct and outer quick-witted drive plate realization communication of inner machine mainboard, outer quick-witted drive plate can output the fixed frequency control signal under the control of inner machine mainboard, guarantee that frequency converter unit can last the operation. According to the communication control method of the frequency conversion unit, when a fault occurs between an outer unit main control board and an outer unit drive board of the frequency conversion unit, the constant-frequency operation mode can be directly converted to ensure that the unit continuously operates, the non-stop control of the frequency conversion unit is realized, and the communication control method of the frequency conversion unit has higher working reliability compared with the traditional frequency conversion unit.
Referring to fig. 7, a frequency converter set system includes: the frequency conversion device comprises an inner machine main board 10, an outer machine main control board 20, an outer machine drive board 30 and a sensing device 40, wherein the inner machine main board 10, the outer machine main control board 20 and the outer machine drive board 30 are respectively used for being connected with an external alternating current power supply, the outer machine main control board 20 is used for cutting off the communication connection between the inner machine main board 10 and the outer machine main control board 20 and the communication connection between the sensing device 40 and the outer machine main control board 20 when the communication fault occurs between the outer machine main control board 20 and the outer machine drive board 30, and the outer machine drive board 30 is used for carrying out frequency conversion unit communication control according to the method.
Specifically, an inner machine main board of the frequency converter set is connected with an external alternating current power supply AC1, and an outer machine main control board and an outer machine driving board are connected with an external alternating current power supply AC 2. The frequency conversion unit mainly comprises an outdoor unit and an indoor unit, wherein the outdoor unit comprises an outdoor unit main control board 20 and an outdoor unit driving board 30. The outer machine main control board 20 is connected with the sensing device 40 and is used for processing sensor logic so as to control the stable operation of the frequency conversion unit. The external machine drive board 30 is configured to receive a power-on instruction, a frequency-up/down instruction, and the like sent by the external machine main control board 20, so as to implement a power-on operation of the external machine drive board 30, or drive a corresponding device to operate according to a given frequency, so as to implement a frequency conversion operation of the frequency converter set. The variable frequency operation means that the speed of the compressor or the fan driven by the outer machine driving plate 30 can be adjusted under the control of the outer machine main control plate 20, so that when the variable frequency unit is applied to an air conditioner, the refrigerating capacity or the heating capacity of the air conditioner can be adjusted. For example, when the air conditioner is just started, due to the reason that the difference between the indoor temperature and the target temperature of the air conditioner is large and the like, the outer unit main control board 20 controls the outer unit drive board 30 to output large power, controls the compressor and the fan to operate at high speed, is in a high-frequency operation state, and can realize quick refrigeration or heating, and when the indoor temperature is consistent with or close to the target temperature, the outer unit main control board 20 can control the compressor and the fan to operate at low speed by controlling the outer unit drive board 30 to output small power, so that small refrigeration or heating quantity can be maintained, and electric energy can be effectively saved.
The biggest difference between the fixed-frequency unit and the variable-frequency unit is that an outer unit main control board 20 is not arranged in an outer unit of the fixed-frequency unit, and a fixed-frequency control signal is directly sent to the outer unit main control board 20 by an inner unit main board 10, so that the fixed-frequency operation of the unit is realized, and the possibility of communication failure between the outer unit main control board 20 and an outer unit drive board 30 cannot occur. Therefore, when a communication fault occurs between the outer machine main control board 20 and the outer machine drive board 30 of the frequency converter set, the frequency conversion control scheme can be converted into a fixed frequency control scheme similar to that of the fixed frequency unit, so that the frequency converter set is prevented from being stopped due to the fault when the communication fault occurs, and the comfort level and the user experience of a user are effectively improved. Therefore, when a communication fault occurs between the outer unit main control board 20 and the outer unit drive board 30 of the frequency converter set, the communication connection between the inner unit main board 10 and the outer unit main control board 20 and the communication connection between the sensing device 40 and the outer unit main control board 20 can be disconnected, so that different communication lines can be established in subsequent operations, and a fixed-frequency control scheme of the frequency converter set is realized. It should be noted that the sensing device 40 includes a plurality of sensors, each of which is connected to the outdoor unit main control board 20, and transmits the acquired corresponding data to the outdoor unit main control board 20 for analysis and processing. For example, temperature sensors, pressure sensors, etc., the outer unit main control board 20 controls the stable and safe operation of the whole frequency conversion unit through the environmental temperature data collected by the temperature sensors, the pressure data collected by the pressure sensors, etc.
In this embodiment, different control boards are respectively used to disconnect and connect communication. It is understood that in other embodiments, other control motherboards may be used to cut off the communication connection between the inner motherboard 10 and the outer main control board 20 and the communication connection between the sensing device 40 and the outer main control board 20, or to control the sensing device 40 to establish the communication connection with the outer drive board 30 and the inner motherboard 10 to establish the communication connection with the outer drive board 30, for example, a separate controller is added.
In an embodiment, referring to fig. 7, the inverter set system further includes a first switch device K1, a second switch device K2, a third switch device K3, and a fourth switch device K4, the inner set main board 10 is in communication connection with the outer set main control board 20 through the first switch device K1, the outer set main control board 20 is in communication connection with the outer set drive board 30 through the second switch device K2, the outer set main control board 20 is in communication connection with the sensing device 40 through the third switch device K3, and the inner set main board 10 is in communication connection with the outer set drive board 30 through the fourth switch device K4.
Specifically, in order to conveniently realize disconnection and connection of communication connection between each device in the frequency converter set, switch devices are respectively arranged between the inner unit main board 10 and the outer unit main control board 20, between the outer unit main control board 20 and the sensing device 40, between the outer unit drive board 30 and the sensing device 40, and between the outer unit drive board 30 and the inner unit main board 10 of the frequency converter set. When no communication fault occurs between the outer machine main control board 20 and the outer machine drive board 30, the switch devices between the inner machine main board 10 and the outer machine main control board 20 and the switch devices between the sensing device 40 and the outer machine main control board 20 are all turned off, the switch devices between the inner machine main board 10 and the outer machine drive board 30 and the switch devices between the sensing device 40 and the outer machine drive board 30 are all in a disconnected state, and at the moment, the outer machine drive board 30 can normally receive the frequency conversion control signal sent by the outer machine main control board 20, so that the frequency conversion operation control operation of the frequency conversion machine set can be realized. When a communication fault occurs between the outer machine main control board 20 and the outer machine drive board 30, the switch devices between the inner machine main board 10 and the outer machine main control board 20 and the switch devices between the sensing device 40 and the outer machine main control board 20 are disconnected, and meanwhile, the switch devices between the inner machine main board 10 and the outer machine drive board 30 and the switch devices between the sensing device 40 and the outer machine drive board 30 are controlled to be closed, so that the frequency converter set is controlled to perform a fixed-frequency operation mode, and the non-stop operation of the frequency converter set is ensured.
Further, in one embodiment, the first switching device K1 and the third switching device K3 are both normally closed relays, and the second switching device K2 and the fourth switching device K4 are both normally open relays.
Specifically, a normally closed relay is a relay in which the relay contacts are in a closed state under normal conditions, and a normally open relay is just the opposite, and the relay contacts are in an open state under normal conditions. As the frequency converter set is a set for frequency conversion control, in a normal situation, the communication connection state is between the inner machine main board 10 and the outer machine main control board 20, and between the outer machine main control board 20 and the sensing device 40, and the communication connection state is not required between the inner machine main board 10 and the outer machine drive board 30, and between the sensing device 40 and the outer machine drive board 30. Therefore, in this embodiment, normally closed relays are disposed on the communication lines between the inner machine main board 10 and the outer machine main control board 20 and between the outer machine main control board 20 and the sensing device 40 to implement communication connection, and normally open relays are disposed on the connection lines between the inner machine main board 10 and the outer machine drive board 30 and between the sensing device 40 and the outer machine drive board 30 to facilitate quick connection between the inner machine main board 10 and the outer machine drive board 30 and between the sensing device 40 and the outer machine drive board 30 when needed, which is convenient to operate and easy to implement. It is understood that, in other embodiments, other types of switch devices may be used, as long as it is ensured that the communication line can be switched in time to realize the fixed frequency operation when the communication between the outer unit main control board 20 and the outer unit driving board 30 fails.
In one embodiment, referring to fig. 8, the inverter unit system further includes a fan 60 and a compressor 50, and the fan 60 and the compressor 50 are respectively connected to the external machine driving board 30.
Specifically, when the external unit driving board 30 of the inverter unit receives signals such as raising and lowering the frequency, the power control fan 60 and the compressor 50 with corresponding sizes can be output to operate at corresponding rotating speeds, so that the cooling and heating operations of the air conditioner are realized. Similarly, when the inverter set is switched to a constant frequency operation, the external unit drive board 30 receives a constant frequency signal sent by the internal unit main board 10, and then outputs a given output power to control the operation of the fan 60 and the compressor 50, thereby realizing heating and cooling operations.
In an embodiment, referring to fig. 9, when a communication fault occurs between the outer unit main control board 20 of the inverter group and the outer unit drive board 30 of the inverter group, the two types of faults are divided, where when the fault is a communication chip fault, the communication connection between the inner unit main board 10 and the outer unit main control board 20 of the inverter group is cut off, the communication connection between the sensing device 40 and the outer unit main control board 20 of the inverter group is cut off, the communication connection between the outer unit drive board 30 and the sensing device 40, and the communication connection between the outer unit drive board 30 and the inner unit main board 10 are established, that is, the communication connections K1 and K3 are disconnected, and the communication connections K2 and K4. And when the fault is a communication line fault, judging whether the fault can be recovered, namely judging whether the fault is caused by interference of a communication signal, if not, performing operation similar to the communication chip fault, and if so, waiting for the recovery of the fault. When the switches K1 and K3 are opened and the switches K2 and K4 are closed, the external machine driving board 30 of the frequency converter set can realize fixed frequency control operation under the control of the internal machine main board 10, and at the moment, only corresponding fault information needs to be fed back to the remote server for storage.
Above-mentioned frequency converter unit system, when the communication trouble takes place between the outer quick-witted main control panel of frequency converter unit and the outer quick-witted drive plate, outer quick-witted drive plate judges whether communication trouble can resume, when communication trouble can not resume, establish communication connection between sensing device and the outer quick-witted drive plate and the communication connection between inner quick-witted mainboard and the outer quick-witted drive plate for the direct and outer quick-witted drive plate realization communication of inner quick-witted mainboard, outer quick-witted drive plate can output the control signal of fixed frequency under the control of inner quick-witted mainboard, guarantee that frequency converter unit can last operation. Through the frequency conversion unit system, when a fault occurs between the outer machine main control board and the outer machine drive board of the frequency conversion unit, the constant-frequency operation mode is directly converted to ensure that the unit continuously operates, the non-stop control of the frequency conversion unit is realized, and the frequency conversion unit system has higher working reliability compared with the traditional frequency conversion unit.
The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only express several embodiments of the present application, and the description thereof is more specific and detailed, but not construed as limiting the claims. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the concept of the present application, which falls within the scope of protection of the present application. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (9)
1. A communication control method for a frequency converter unit is characterized by being applied to an external unit driving plate of the frequency converter unit, and the method comprises the following steps:
when a communication fault occurs between the frequency conversion unit and an outer unit main control board, judging whether the communication fault can be recovered;
if not, the frequency converter is in communication connection with a sensing device of the frequency converter set and is in communication connection with an inner machine mainboard of the frequency converter set, so that a fixed-frequency control signal can be output under the control of the inner machine mainboard, and fixed-frequency operation of the frequency converter set is realized;
if so, waiting for the communication fault between the main control board of the outdoor unit and the main control board of the outdoor unit to recover;
the outer machine main control board is used for cutting off the communication connection between the outer machine main control board and the inner machine main board when a communication fault is detected, and simultaneously cutting off the communication connection between the sensing device and the outer machine main control board.
2. The communication control method for the inverter group according to claim 1, wherein before the step of determining whether the communication failure can be recovered when the communication failure occurs with the outdoor unit main control board of the inverter group, the method further comprises:
when a communication signal sent by an outdoor unit main control board of the frequency conversion unit is received, timing is started with a preset time length;
and if the communication signal sent by the outer machine main control board is not received again within the preset time, a communication fault occurs between the communication signal and the outer machine main control board.
3. The communication control method of the inverter group according to claim 2, wherein a recoverable communication failure is that a communication signal is interfered, and the step of determining whether the communication failure is recoverable when the communication failure occurs with an outdoor unit main control board of the inverter group comprises:
when a communication fault occurs between the frequency converter set and an outer machine main control board, acquiring corresponding communication fault information;
and obtaining a communication fault type according to the communication fault information and judging whether the communication fault type is that a communication signal is interfered.
4. The communication control method of the inverter group according to claim 3, wherein after the step of obtaining the corresponding communication failure information when a communication failure occurs between the inverter group and an outdoor unit main control board, the method further comprises:
and sending the communication fault information to a remote server and storing the communication fault information.
5. The utility model provides a frequency conversion unit communication control device which characterized in that is applied to the outer quick-witted drive plate of frequency conversion unit, the device includes:
the communication fault judgment module is used for judging whether the communication fault can be recovered or not when the communication fault occurs between the communication fault judgment module and an outer machine main control board of the frequency conversion unit;
the communication line switching module is used for being in communication connection with a sensing device of the frequency converter set when the communication fault cannot be recovered and is also in communication connection with an inner machine main board of the frequency converter set, so that a fixed-frequency control signal can be output under the control of the inner machine main board to realize the fixed-frequency operation of the frequency converter set, and the communication line switching module is also used for waiting for the recovery of the communication fault with the outer machine main control board when the communication fault can be recovered; the outer machine main control board is used for cutting off the communication connection between the outer machine main control board and the inner machine main board when a communication fault is detected, and simultaneously cutting off the communication connection between the sensing device and the outer machine main control board.
6. A frequency converter unit system is characterized by comprising: the device comprises an inner machine mainboard, an outer machine main control board, an outer machine driving board and a sensing device, wherein the inner machine mainboard, the outer machine main control board and the outer machine driving board are respectively used for connecting an external alternating current power supply,
the outdoor unit main control board is used for cutting off communication connection between the indoor unit main board and the outdoor unit main control board and cutting off communication connection between the sensing device and the outdoor unit main control board when a communication fault occurs between the outdoor unit main control board and the outdoor unit drive board, and the outdoor unit drive board is used for carrying out communication control on the frequency conversion unit according to the method of any one of claims 1 to 4 when a communication fault occurs between the outdoor unit main control board and the outdoor unit main control board.
7. The frequency converter set system according to claim 6, further comprising a first switch device, a second switch device, a third switch device, and a fourth switch device, wherein the inner machine main board is communicatively connected to the outer machine main control board via the first switch device, the outer machine main control board is communicatively connected to the outer machine drive board via the second switch device, the outer machine main control board is communicatively connected to the sensing device via the third switch device, and the inner machine main board is communicatively connected to the outer machine drive board via the fourth switch device.
8. The frequency converter set system according to claim 7, wherein the first switching device and the third switching device are both normally closed relays, and the second switching device and the fourth switching device are both normally open relays.
9. The inverter assembly system of claim 6, further comprising a fan and a compressor, wherein the fan and the compressor are respectively connected to the external machine driving plate.
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