CN111442469A - Overvoltage protection method, indoor main control board, air conditioner and storage medium - Google Patents
Overvoltage protection method, indoor main control board, air conditioner and storage medium Download PDFInfo
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- CN111442469A CN111442469A CN202010249227.5A CN202010249227A CN111442469A CN 111442469 A CN111442469 A CN 111442469A CN 202010249227 A CN202010249227 A CN 202010249227A CN 111442469 A CN111442469 A CN 111442469A
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- main control
- relay
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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
- F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
- F24F11/49—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring ensuring correct operation, e.g. by trial operation or configuration checks
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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
- F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
- F24F11/63—Electronic processing
- F24F11/64—Electronic processing using pre-stored data
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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
- F24F11/89—Arrangement or mounting of control or safety devices
Abstract
The invention discloses an overvoltage protection method. The method comprises the following steps: receiving a fault mark sent by an outdoor main control board, wherein the fault mark is generated when the voltage of a direct current bus of the outdoor main control board is higher than a preset safe voltage; determining the number of times of the received fault mark, and judging whether the number of times of the fault mark meets the disconnection condition of the relay or not; and if the frequency of the fault mark meets the disconnection condition of the relay, controlling the relay to be continuously disconnected so as to realize overvoltage protection on the electrolytic capacitor on the outdoor main control panel. The invention also discloses an indoor main control board, an air conditioner and a computer readable storage medium. The invention cuts off the input high voltage of the outdoor main control board, and avoids the situation that the electrolytic capacitor on the outdoor main control board bursts due to the input high voltage, thereby prolonging the service life of the electrolytic capacitor.
Description
Technical Field
The invention relates to the technical field of air conditioners, in particular to an overvoltage protection method, an indoor main control board, an air conditioner and a storage medium.
Background
Along with the continuous enhancement of people's energy-conserving consciousness, inverter air conditioner more and more receives people's favor, generally need use electrolytic capacitor in inverter air conditioner's off-premises station power supply circuit, because electrolytic capacitor can play the effect of filtering and absorption feedback electric energy in off-premises station power supply circuit's rectification link. However, according to statistics, the electrolytic capacitor fault is the fault of the first three parts of the failure rank of the device on the outdoor main control panel of the air conditioner, and the main reason of the electrolytic capacitor fault is that the input voltage of the outdoor main control panel is too high.
The existing electrolytic capacitor overvoltage protection is that an overvoltage protection device or circuit is often added in an original outdoor unit power supply circuit, but other circuits and elements need to be added in the original outdoor unit power supply circuit in such a way, so that the existing electrolytic capacitor overvoltage protection mode increases the hardware cost of the air conditioner, and other faults of the air conditioner are more easily caused by the failure of the circuit of the overvoltage protection circuit.
Disclosure of Invention
The invention mainly aims to provide an overvoltage protection method, an indoor main control board, an air conditioner and a storage medium, and aims to solve the technical problem that an electrolytic capacitor fails due to high voltage input by an outdoor main control board on the basis of not changing the hardware structure of the air conditioner.
In order to achieve the above object, the present invention provides an overvoltage protection method, including the steps of:
receiving a fault mark sent by an outdoor main control board, wherein the fault mark is generated when the voltage of a direct current bus of the outdoor main control board is higher than a preset safe voltage;
determining the number of times of the received fault mark, and judging whether the number of times of the fault mark meets the disconnection condition of the relay or not;
and if the frequency of the fault mark meets the disconnection condition of the relay, controlling the relay to be continuously disconnected so as to realize overvoltage protection on the electrolytic capacitor on the outdoor main control panel.
Optionally, the step of determining the number of times of the received fault flag and determining whether the number of times of the fault flag satisfies an open condition of the relay includes:
counting the received fault marks to obtain the times of the received fault marks;
and judging whether the frequency of the fault mark is greater than or equal to a preset threshold value or not, and determining whether the frequency of the fault mark meets the disconnection condition of the relay or not according to a judgment result.
Optionally, the step of determining whether the number of times of the fault flag is greater than or equal to a preset threshold, and determining whether the number of times of the fault flag satisfies a disconnection condition of the relay according to a determination result includes:
judging whether the frequency of the fault mark is greater than or equal to a preset threshold value or not;
if the frequency of the fault mark is greater than or equal to a preset threshold value, judging that the frequency of the fault mark meets the disconnection condition of the relay;
and if the frequency of the fault mark is less than a preset threshold value, judging that the frequency of the fault mark does not meet the disconnection condition of the relay.
Optionally, after the step of determining whether the number of times of the fault flag is greater than or equal to a preset threshold and determining whether the number of times of the fault flag satisfies a disconnection condition of the relay according to a determination result, the method includes:
if the frequency of the fault mark does not meet the opening condition of the relay, controlling the relay to be opened after delaying a first preset time length, and controlling the relay to be closed after being opened for a second preset time length;
updating the times of the fault mark according to a preset rule, and returning to the step: and receiving the fault mark sent by the outdoor main control board.
Optionally, the step of counting the received fault flags to obtain the number of times of receiving the fault flags includes:
and counting the received fault marks through a preset counting variable to obtain the times of the received fault marks.
Optionally, before the step of receiving the fault flag sent by the outdoor main control board, the method includes:
and performing zero-returning processing on the times of the fault marks in the counting variable.
Optionally, after the step of controlling the relay to continuously open if the number of times of the fault flag satisfies the open condition of the relay, the method includes:
and generating a fault code and displaying the fault code on a display panel of the indoor unit.
In addition, to achieve the above object, the present invention also provides an indoor main control panel, including: the overvoltage protection device comprises a memory, a processor and an overvoltage protection program stored on the memory and capable of running on the processor, wherein the overvoltage protection program realizes the steps of the overvoltage protection method when being executed by the processor.
Further, to achieve the above object, the present invention also provides an air conditioner including: the indoor main control board is connected with the outdoor main control board through a relay, and the indoor main control board is used for supplying power to the outdoor main control board through the relay; wherein, indoor main control panel includes: the overvoltage protection device comprises a memory, a processor and an overvoltage protection program stored on the memory and capable of running on the processor, wherein the overvoltage protection program realizes the steps of the overvoltage protection method when being executed by the processor.
In addition, to achieve the above object, the present invention further provides a computer readable storage medium, on which an overvoltage protection program is stored, and the overvoltage protection program, when executed by a processor, implements the steps of the overvoltage protection method described above.
The invention provides an overvoltage protection method, an indoor main control board, an air conditioner and a storage medium. Receiving a fault mark sent by an outdoor main control board, wherein the fault mark is generated when the voltage of a direct current bus of the outdoor main control board is higher than a preset safe voltage; determining the number of times of the received fault mark, and judging whether the number of times of the fault mark meets the disconnection condition of the relay or not; and if the frequency of the fault mark meets the disconnection condition of the relay, controlling the relay to be continuously disconnected so as to realize overvoltage protection on the electrolytic capacitor on the outdoor main control panel. Through the implementation mode, the direct-current bus voltage of the outdoor main control board is detected in real time, when the direct-current bus voltage is higher than the preset safe voltage, the outdoor main control board generates the fault mark and transmits the fault mark to the indoor main control board, the indoor main control board judges whether the frequency of the fault mark meets the disconnection condition of the relay or not after receiving the fault mark, and when the frequency of the fault mark meets the disconnection condition of the relay, the relay is continuously kept in the disconnection state, so that the input high voltage of the outdoor main control board is cut off, the situation that an electrolytic capacitor on the outdoor main control board bursts due to the input high voltage is avoided, and the service life of the electrolytic capacitor is prolonged.
Drawings
Fig. 1 is a schematic structural diagram of an indoor main control board according to an embodiment of the present invention;
fig. 2 is a schematic flow chart of a first embodiment of the overvoltage protection method of the present invention;
fig. 3 is a schematic flow chart of a second embodiment of the overvoltage protection method of the invention;
fig. 4 is a schematic flow chart of a third embodiment of the overvoltage protection method of the invention;
fig. 5 is a schematic structural diagram of an air conditioner according to an embodiment of the present invention.
The implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.
Detailed Description
It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
As shown in fig. 1, fig. 1 is a schematic structural diagram of an indoor main control board according to an embodiment of the present invention. The indoor main control panel is arranged in an indoor unit of the air conditioner, the outdoor main control panel is arranged in an outdoor unit of the air conditioner, and the indoor main control panel is connected with the outdoor main control panel through a bus so as to realize communication between the indoor main control panel and the outdoor main control panel. It should be noted that the bus here may be a serial port line or a CAN bus, and the present invention is not particularly limited.
As shown in fig. 1, the indoor main control panel may include: a processor 1001, such as a CPU, a user interface 1002, a memory 1003, and a communication bus 1004. Wherein a communication bus 1004 is used to enable connective communication between these components. The user interface 1002 may include a Display screen (Display), an input unit such as a remote control signal receiving module. The memory 1003 may be a high-speed RAM memory or a non-volatile memory (e.g., a disk memory). The memory 1003 may alternatively be a storage device separate from the processor 1001.
It will be understood by those skilled in the art that the indoor main control panel structure shown in fig. 1 does not constitute a limitation of the indoor main control panel, and may include more or less components than those shown, or combine some components, or a different arrangement of components.
As shown in fig. 1, the memory 1003, which is a kind of computer storage medium, may include therein an operating system, a user interface module, and an overvoltage protection program. The processor 1001 may be configured to invoke the overvoltage protection program stored in the memory 1003 and perform the following operations:
receiving a fault mark sent by an outdoor main control board, wherein the fault mark is generated when the voltage of a direct current bus of the outdoor main control board is higher than a preset safe voltage;
determining the number of times of the received fault mark, and judging whether the number of times of the fault mark meets the disconnection condition of the relay or not;
and if the frequency of the fault mark meets the disconnection condition of the relay, controlling the relay to be continuously disconnected so as to realize overvoltage protection on the electrolytic capacitor on the outdoor main control panel.
Further, the processor 1001 may call the overvoltage protection program stored in the memory 1003, and further perform the following operations:
counting the received fault marks to obtain the times of the received fault marks;
and judging whether the frequency of the fault mark is greater than or equal to a preset threshold value or not, and determining whether the frequency of the fault mark meets the disconnection condition of the relay or not according to a judgment result.
Further, the processor 1001 may call the overvoltage protection program stored in the memory 1003, and further perform the following operations:
judging whether the frequency of the fault mark is greater than or equal to a preset threshold value or not;
if the frequency of the fault mark is greater than or equal to a preset threshold value, judging that the frequency of the fault mark meets the disconnection condition of the relay;
and if the frequency of the fault mark is less than a preset threshold value, judging that the frequency of the fault mark does not meet the disconnection condition of the relay.
Further, the processor 1001 may call the overvoltage protection program stored in the memory 1003, and further perform the following operations:
if the frequency of the fault mark does not meet the opening condition of the relay, controlling the relay to be opened after delaying a first preset time length, and controlling the relay to be closed after being opened for a second preset time length;
updating the times of the fault mark according to a preset rule, and returning to the step: and receiving the fault mark sent by the outdoor main control board.
Further, the processor 1001 may call the overvoltage protection program stored in the memory 1003, and further perform the following operations:
and counting the received fault marks through a preset counting variable to obtain the times of the received fault marks.
Further, the processor 1001 may call the overvoltage protection program stored in the memory 1003, and further perform the following operations:
and performing zero-returning processing on the times of the fault marks in the counting variable.
Further, the processor 1001 may call the overvoltage protection program stored in the memory 1003, and further perform the following operations:
and generating a fault code and displaying the fault code on a display panel of the indoor unit.
The specific embodiment of the indoor main control board of the present invention is basically the same as the embodiments of the overvoltage protection method described below, and is not described herein again.
Referring to fig. 2, fig. 2 is a schematic flow chart of a first embodiment of the overvoltage protection method of the present invention, and the overvoltage protection method includes:
step S10, receiving a fault flag sent by the outdoor main control board, where the fault flag is a fault flag generated when the voltage of the dc bus of the outdoor main control board is higher than a preset safe voltage.
The indoor main control board supplies power to the outdoor main control board through the relay, the outdoor main control board converts the input 220V alternating current into direct current through the rectifying circuit and the filtering circuit, and at the moment, direct current bus voltage is formed at two ends of an electrolytic capacitor in the filtering circuit to supply power to a motor in the outdoor unit. Since the rectifying circuit and the filter circuit are prior art, they are not described in detail herein.
The method comprises the steps that an outdoor main control board obtains voltages at two ends of an electrolytic capacitor, namely the direct current bus voltage, judges whether the direct current bus voltage is higher than a preset safe voltage or not, generates a fault mark when the direct current bus voltage is detected to be higher than the preset safe voltage, and sends the fault mark to an indoor main control board. Therefore, the indoor main control board receives the fault mark sent by the outdoor main control board, and judges whether the input voltage of the current outdoor main control board is overvoltage or not according to the received fault mark.
And step S20, determining the times of the received fault signs, and judging whether the times of the fault signs meet the opening conditions of the relay.
And after receiving the fault mark, the indoor main control board determines the frequency of the received fault mark and judges whether the turn-off condition of the relay is met according to the frequency of the fault mark. It should be noted that the turn-off condition of the relay here may be that the total number of times of the fault flag reaches a preset threshold, or that the number of times of the fault flag reaches the preset threshold within a preset time, or of course, the indoor main control board may meet the turn-off condition of the relay as long as the fault flag is received, and the turn-off condition of the relay may be set according to actual needs, which is not specifically limited in this embodiment. If the number of times of the fault flag satisfies the turn-off condition of the relay, executing step S30; if the number of times of the failure flag does not satisfy the relay-off condition, step S10 is executed to continue the next determination.
And step S30, controlling the relay to keep off so as to realize overvoltage protection on the electrolytic capacitor on the outdoor main control panel.
When the frequency of judging the fault mark of the indoor main control board meets the disconnection condition of the relay, the relay between the indoor main control board and the outdoor main control board is controlled to be continuously disconnected, so that the indoor main control board cannot supply power to the outdoor main control board through the relay, and high voltage at two ends of the electrolytic capacitor disappears, so that overvoltage protection is performed on the electrolytic capacitor on the outdoor main control board.
In this embodiment, the direct current bus voltage of the outdoor main control board is detected in real time, when the direct current bus voltage is higher than the preset safe voltage, the outdoor main control board generates a fault mark, and transmits the fault mark to the indoor main control board, after the indoor main control board receives the fault mark, whether the frequency of the fault mark meets the disconnection condition of the relay is judged, and when the frequency of the fault mark meets the disconnection condition of the relay, the relay is continuously kept in a disconnection state, so that the input high voltage of the outdoor main control board is cut off, the situation that the electrolytic capacitor on the outdoor main control board bursts due to the input high voltage is avoided, and therefore the service life of the electrolytic capacitor is prolonged.
Further, referring to fig. 3, fig. 3 is a schematic flow chart of a second embodiment of the overvoltage protection method according to the invention. Based on the above embodiment shown in fig. 2, the step S20: determining the number of times of the received fault mark, and judging whether the number of times of the fault mark meets the disconnection condition of the relay, wherein the method comprises the following steps:
step S201, counting the received fault flag to obtain the number of times of receiving the fault flag.
In this embodiment, the switching-off condition of the relay is that the total number of times of the fault flag reaches a preset threshold, and therefore, after the indoor main control board receives the fault flag, the indoor main control board needs to count the fault flag so as to obtain the number of times of the received fault flag.
Step S202, judging whether the frequency of the fault mark is greater than or equal to a preset threshold value, and determining whether the frequency of the fault mark meets the disconnection condition of the relay according to the judgment result.
Specifically, the step S202 includes:
step S210, determining whether the number of times of the fault flag is greater than or equal to a preset threshold.
And step S211, if the frequency of the fault mark is greater than or equal to a preset threshold value, determining that the frequency of the fault mark meets the disconnection condition of the relay.
And step S212, if the frequency of the fault mark is less than a preset threshold value, determining that the frequency of the fault mark does not meet the disconnection condition of the relay.
It should be noted that the preset threshold may be any positive integer such as 1, 2, 3, etc., and the present invention is not limited in particular. In the present embodiment, 3 is preferred as the preset threshold. When the number of times that the indoor main control board receives the fault mark is greater than or equal to 3, the current switching-off condition of the relay is met, and the relay needs to be continuously switched off; when the frequency of receiving the fault mark by the indoor main control board is less than 3, the indoor main control board indicates that the current disconnection condition of the relay is not met, the relay needs to be disconnected after delaying for a first preset time, and the relay is controlled to be closed after being disconnected for a second preset time.
In this embodiment, only when the total number of times of the fault flag received by the indoor main control board reaches the preset threshold value, the relay is continuously disconnected, and the relay is not continuously disconnected immediately as soon as the indoor main control board receives the fault flag, so that it is possible to avoid the situation that the outdoor main control board is suddenly stopped to supply power due to accidental voltage jump, which leads to unstable operation of the outdoor unit.
Further, referring to fig. 4, fig. 4 is a schematic flow chart of a third embodiment of the overvoltage protection method according to the invention. Based on the embodiment shown in fig. 3, in step S202: judging whether the frequency of the fault mark is greater than or equal to a preset threshold value or not, and determining whether the frequency of the fault mark meets the disconnection condition of the relay according to the judgment result, wherein the method comprises the following steps:
and step S203, if the frequency of the fault mark does not meet the disconnection condition of the relay, controlling the relay to be disconnected after delaying the first preset time length, and controlling the relay to be closed after being disconnected for the second preset time length.
When the frequency of the fault mark does not meet the disconnection condition of the relay, the indoor main control board controls the relay to be disconnected after delaying the first preset time and to be closed after being disconnected for the second preset time. It should be noted that, the first preset time period and the second preset time period may be set according to actual situations, and the present invention is not limited specifically. In this embodiment, the first preset time period is preferably 12 seconds, and the second preset time period is preferably 2 minutes. That is, when the indoor main control board receives the fault sign and the number of times of the fault sign does not reach the turn-off condition of the relay, the indoor main control board controls the relay to be turned off within 12 seconds and turned on after being turned off for 2 minutes, so that the relay can be turned off temporarily when the input high voltage is detected, the input voltage is turned on again after a short time, and the direct-current bus voltage is detected again.
Step S204, updating the times of the fault mark according to a preset rule, and returning to the step: and receiving the fault mark sent by the outdoor main control board.
After the control relay is closed again, the indoor main control board updates the number of times of the fault mark according to a preset rule, and if the step S203 is executed, the number of times of the fault mark is increased by 1, so that the indoor main control board can clearly solve the actual number of times of receiving the fault mark. Of course, as another embodiment, each time the step S203 is executed, a numerical value such as 2, 3, or 4 may be added to the number of times of the failure flag, and the present invention is not particularly limited. After the number of times of the failure flag is updated, the process returns to step S10 and continues the next round of the loop.
In the embodiment, the number of times of the fault mark does not meet the disconnection condition of the relay, the relay is closed after being disconnected for a short time, and the process is circulated until the disconnection condition of the relay is reached, so that the relay is continuously disconnected only when the indoor main control board determines that the input voltage of the outdoor main control board is high for many times, and the accuracy of high-voltage protection judgment is improved.
Further, based on the embodiment shown in fig. 3, the step S201: counting the received fault signs to obtain the times of the received fault signs, wherein the counting comprises the following steps:
step S220, counting the received fault signs through a preset counting variable to obtain the times of the received fault signs.
In this embodiment, the received fault flag is counted by using a preset counting variable on the indoor main control board, so as to obtain the number of times of receiving the fault flag. Specifically, before the indoor main control board receives the fault flag sent by the outdoor main control board, a counting variable needs to be preset in the indoor main control board for counting the received fault flag and performing zero-resetting processing on the frequency of the fault flag in the counting variable, so that when the indoor main control board subsequently receives the fault flag, the frequency of the fault flag can be counted based on the technical variable.
Further, based on the embodiment shown in fig. 2, at the step S30: if the number of times of the fault mark meets the disconnection condition of the relay, controlling the relay to be continuously disconnected comprises the following steps:
step S30 is to generate a trouble code and display the trouble code on the display panel of the indoor unit.
In this embodiment, after the indoor main control board determines that the outdoor main control board inputs high voltage, the relay needs to be controlled to be continuously disconnected, and meanwhile, an overvoltage protection fault code is generated and displayed on a display screen of the indoor unit, so that fault information is conveniently prompted to a user, the user can know the fault reason in time, and after-sales personnel are contacted for home maintenance.
In addition, an embodiment of the present invention further provides an air conditioner, including: indoor main control panel 100, outdoor main control panel 300 and relay 200, indoor main control panel 100 with connect through relay 200 between the outdoor main control panel 300, be used for through relay 200 is right outdoor main control panel 300 supplies power. Referring to fig. 5, fig. 5 is a schematic structural diagram of an air conditioner according to an embodiment of the present invention. Wherein, the indoor main control panel 100 includes: a memory, a processor, and an over-voltage protection program stored on the memory and executable on the processor, the over-voltage protection program when executed by the processor implementing the steps of:
receiving a fault mark sent by an outdoor main control board, wherein the fault mark is generated when the voltage of a direct current bus of the outdoor main control board is higher than a preset safe voltage;
determining the number of times of the received fault mark, and judging whether the number of times of the fault mark meets the disconnection condition of the relay or not;
and if the frequency of the fault mark meets the disconnection condition of the relay, controlling the relay to be continuously disconnected so as to realize overvoltage protection on the electrolytic capacitor on the outdoor main control panel.
Further, the overvoltage protection program when executed by the processor implements the steps of:
counting the received fault marks to obtain the times of the received fault marks;
and judging whether the frequency of the fault mark is greater than or equal to a preset threshold value or not, and determining whether the frequency of the fault mark meets the disconnection condition of the relay or not according to a judgment result.
Further, the overvoltage protection program when executed by the processor implements the steps of:
judging whether the frequency of the fault mark is greater than or equal to a preset threshold value or not;
if the frequency of the fault mark is greater than or equal to a preset threshold value, judging that the frequency of the fault mark meets the disconnection condition of the relay;
and if the frequency of the fault mark is less than a preset threshold value, judging that the frequency of the fault mark does not meet the disconnection condition of the relay.
Further, the overvoltage protection program when executed by the processor implements the steps of:
if the frequency of the fault mark does not meet the opening condition of the relay, controlling the relay to be opened after delaying a first preset time length, and controlling the relay to be closed after being opened for a second preset time length;
updating the times of the fault mark according to a preset rule, and returning to the step: and receiving the fault mark sent by the outdoor main control board.
Further, the overvoltage protection program when executed by the processor implements the steps of:
and counting the received fault marks through a preset counting variable to obtain the times of the received fault marks.
Further, the overvoltage protection program when executed by the processor implements the steps of:
and performing zero-returning processing on the times of the fault marks in the counting variable.
Further, the overvoltage protection program when executed by the processor implements the steps of:
and generating a fault code and displaying the fault code on a display panel of the indoor unit.
The specific embodiment of the air conditioner of the present invention is basically the same as the embodiments of the overvoltage protection method, and is not described herein again.
In addition, the embodiment of the invention also provides a computer readable storage medium. The computer-readable storage medium of the present invention has stored thereon an overvoltage protection program which, when executed by a processor, implements the steps of the overvoltage protection method as described above.
The method implemented when the overvoltage protection program running on the processor is executed may refer to each embodiment of the overvoltage protection method of the present invention, and details are not described here.
It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or system that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or system. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, method, article, or system that comprises the element.
The above-mentioned serial numbers of the embodiments of the present invention are merely for description and do not represent the merits of the embodiments.
Through the above description of the embodiments, those skilled in the art will clearly understand that the method of the above embodiments can be implemented by software plus a necessary general hardware platform, and certainly can also be implemented by hardware, but in many cases, the former is a better implementation manner. Based on such understanding, the technical solution of the present invention may be embodied in the form of a software product, which is stored in a storage medium (e.g., ROM/RAM, magnetic disk, optical disk) as described above and includes instructions for enabling a terminal device (e.g., a mobile phone, a computer, a server, an air conditioner, or a network device) to execute the method according to the embodiments of the present invention.
The above description is only a preferred embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes, which are made by using the contents of the present specification and the accompanying drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (10)
1. A method of overvoltage protection, the method comprising:
receiving a fault mark sent by an outdoor main control board, wherein the fault mark is generated when the voltage of a direct current bus of the outdoor main control board is higher than a preset safe voltage;
determining the number of times of the received fault mark, and judging whether the number of times of the fault mark meets the disconnection condition of the relay or not;
and if the frequency of the fault mark meets the disconnection condition of the relay, controlling the relay to be continuously disconnected so as to realize overvoltage protection on the electrolytic capacitor on the outdoor main control panel.
2. The method of claim 1, wherein the step of determining the number of times the fault flag is received and determining whether the number of times the fault flag satisfies a relay open condition comprises:
counting the received fault marks to obtain the times of the received fault marks;
and judging whether the frequency of the fault mark is greater than or equal to a preset threshold value or not, and determining whether the frequency of the fault mark meets the disconnection condition of the relay or not according to a judgment result.
3. The overvoltage protection method according to claim 2, wherein the step of determining whether the number of times of the fault flag is greater than or equal to a preset threshold value and determining whether the number of times of the fault flag satisfies an open condition of the relay according to the determination result includes:
judging whether the frequency of the fault mark is greater than or equal to a preset threshold value or not;
if the frequency of the fault mark is greater than or equal to a preset threshold value, judging that the frequency of the fault mark meets the disconnection condition of the relay;
and if the frequency of the fault mark is less than a preset threshold value, judging that the frequency of the fault mark does not meet the disconnection condition of the relay.
4. The overvoltage protection method according to claim 2, wherein after the step of determining whether the number of times of the fault flag is greater than or equal to a preset threshold value and determining whether the number of times of the fault flag satisfies an open condition of the relay according to the determination result, the method comprises:
if the frequency of the fault mark does not meet the opening condition of the relay, controlling the relay to be opened after delaying a first preset time length, and controlling the relay to be closed after being opened for a second preset time length;
updating the times of the fault mark according to a preset rule, and returning to the step: and receiving the fault mark sent by the outdoor main control board.
5. The overvoltage protection method according to claim 2, wherein said step of counting said fault indications received and obtaining a number of times said fault indications are received comprises:
and counting the received fault marks through a preset counting variable to obtain the times of the received fault marks.
6. The overvoltage protection method according to claim 5, wherein prior to said step of receiving a fault flag transmitted by an outdoor master control board, comprising:
and performing zero-returning processing on the times of the fault marks in the counting variable.
7. The overvoltage protection method according to claim 1, wherein after said step of controlling said relay to continue to open if said number of said fault flags satisfies an open condition of said relay, comprising:
and generating a fault code and displaying the fault code on a display panel of the indoor unit.
8. An indoor main control board, characterized in that, indoor main control board includes: memory, a processor and an overvoltage protection program stored on the memory and executable on the processor, which overvoltage protection program, when executed by the processor, carries out the steps of the overvoltage protection method according to one of claims 1 to 7.
9. An air conditioner, characterized in that the air conditioner comprises: the indoor main control board is connected with the outdoor main control board through a relay, and the indoor main control board is used for supplying power to the outdoor main control board through the relay; wherein, indoor main control panel includes: memory, a processor and an overvoltage protection program stored on the memory and executable on the processor, which overvoltage protection program, when executed by the processor, carries out the steps of the overvoltage protection method according to one of claims 1 to 7.
10. A computer-readable storage medium, characterized in that the computer-readable storage medium has stored thereon an overvoltage protection program which, when executed by a processor, implements the steps of the overvoltage protection method according to any one of claims 1 to 7.
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| CN202010249227.5A CN111442469A (en) | 2020-03-31 | 2020-03-31 | Overvoltage protection method, indoor main control board, air conditioner and storage medium |
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| CN202010249227.5A CN111442469A (en) | 2020-03-31 | 2020-03-31 | Overvoltage protection method, indoor main control board, air conditioner and storage medium |
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Cited By (1)
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