CN114019283B - Capacitive fault detection method and device and range hood - Google Patents
Capacitive fault detection method and device and range hood Download PDFInfo
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- CN114019283B CN114019283B CN202111299243.6A CN202111299243A CN114019283B CN 114019283 B CN114019283 B CN 114019283B CN 202111299243 A CN202111299243 A CN 202111299243A CN 114019283 B CN114019283 B CN 114019283B
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- 238000001514 detection method Methods 0.000 title claims abstract description 31
- 239000003990 capacitor Substances 0.000 claims abstract description 222
- 238000005070 sampling Methods 0.000 claims description 52
- 238000002955 isolation Methods 0.000 claims description 23
- 238000012545 processing Methods 0.000 claims description 6
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/34—Testing dynamo-electric machines
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Abstract
The application provides a capacitor fault detection method, a device and a range hood, wherein the method is applied to a controller of the range hood and comprises the following steps: when a starting signal of a starting capacitor of the range hood is monitored, a pulse signal corresponding to the starting capacitor is obtained; judging whether the waveform of the pulse signal is matched with a preset waveform or not; if not, determining that the starting capacitor fails; and generating a switching signal to trigger a relay connected with the starting capacitor to switch the starting capacitor to a standby capacitor of the starting capacitor. The application can rapidly position the failure of the motor starting capacitor and switch to the standby capacitor, thereby avoiding potential safety hazard and improving the experience of users.
Description
Technical Field
The invention relates to the technical field of motor fault diagnosis, in particular to a capacitor fault detection method and device and a range hood.
Background
At present, as the number of household appliances increases, the failure rate is gradually increased, and the safety is becoming more important. The kitchen is a gathering place of various electric appliances, the failure rate of the kitchen range hood is also slowly increased, when the kitchen range hood fails, the existing method is mostly judged through experience, the existing method is judged to be a motor capacitor failure in many cases, and certain non-capacitor failure conditions, such as motor failure, can cause burning of a power panel, thereby causing fire and bringing potential safety hazards.
Disclosure of Invention
Accordingly, the invention aims to provide a capacitor fault detection method and device and a range hood, which can rapidly locate a fault of a motor starting capacitor and switch the fault to a standby capacitor, thereby avoiding potential safety hazards and improving user experience.
In a first aspect, an embodiment of the present invention provides a method for detecting a capacitor fault, which is applied to a controller of a range hood; the method comprises the following steps: when a starting signal of a starting capacitor of the range hood is monitored, a pulse signal corresponding to the starting capacitor is obtained; judging whether the waveform of the pulse signal is matched with a preset waveform or not; if not, determining that the starting capacitor fails; and generating a switching signal to trigger a relay connected with the starting capacitor to switch the starting capacitor to a standby capacitor of the starting capacitor.
With reference to the first aspect, an embodiment of the present invention provides a first possible implementation manner of the first aspect, where the method further includes: and after the completion of the switch of the starting capacitor is monitored, generating a restarting signal of the range hood, and triggering the range hood to restart.
With reference to the first aspect, the embodiment of the present invention provides a second possible implementation manner of the first aspect, where the range hood further includes an alarm connected to the controller; after the start capacitor is determined to fail, the method further includes: generating alarm information, and triggering an alarm to carry out alarm prompt according to the alarm information.
In a second aspect, the embodiment of the invention also provides a capacitor fault detection device which is applied to a controller of the range hood; the device comprises: the acquisition module is used for acquiring a pulse signal corresponding to the starting capacitor when the starting signal of the starting capacitor of the range hood is monitored; the judging module is used for judging whether the waveform of the pulse signal is matched with a preset waveform or not; the determining module is used for determining that the starting capacitor fails when the judging result of the judging module is negative; and the switching module is used for generating a switching signal to trigger a relay connected with the starting capacitor to switch the starting capacitor to a standby capacitor of the starting capacitor.
In a third aspect, the embodiment of the invention further provides a range hood, wherein the range hood comprises a controller, a first sampling circuit, a second sampling circuit, a phase comparator, a relay driving chip, a relay, a motor, a starting capacitor and a standby capacitor, wherein the starting capacitor and the standby capacitor are connected with the relay, the starting capacitor and the standby capacitor are switched through the relay, and the relay is also connected with the relay driving chip; the first sampling circuit and the second sampling circuit are connected to the controller through the phase comparator, the input end of the relay driving chip is connected with the controller, and the output end of the relay driving chip is connected with the motor; the first sampling circuit is used for collecting and processing the municipal electric signal to obtain a first pulse signal and sending the first pulse signal to the phase comparator; the second sampling circuit is used for collecting and processing the electric signal output by the starting capacitor to obtain a second pulse signal and sending the second pulse signal to the phase comparator; the phase comparator is used for receiving the first pulse signal and the second pulse signal, generating a pulse signal corresponding to the starting capacitor according to the first pulse signal and the second pulse signal, and sending the pulse signal corresponding to the starting capacitor to the controller; the controller is configured to perform the capacitive fault detection method of the first aspect to perform capacitive fault detection on the start-up capacitance.
With reference to the third aspect, an embodiment of the present invention provides a first possible implementation manner of the third aspect, where the first sampling circuit is an optically coupled zero isolation sampling circuit, and is configured to convert an acquired commercial electric signal into a first pulse signal.
With reference to the third aspect, an embodiment of the present invention provides a second possible implementation manner of the third aspect, where the second sampling circuit is an optocoupler isolation sampling circuit; one input end of the optical coupling isolation sampling circuit is connected to the starting capacitor and the standby capacitor, and the other input end of the optical coupling isolation sampling circuit is connected to a zero line of the mains supply; the output end of the optical coupling isolation sampling circuit is connected to the phase comparator; the optical coupling isolation sampling circuit is used for generating a second pulse signal according to a zero line signal of the mains supply and an electric signal output by the motor through the starting capacitor or the standby capacitor.
With reference to the third aspect, an embodiment of the present invention provides a third possible implementation manner of the third aspect, where the phase comparator is an exclusive or gate comparator.
With reference to the third aspect, an embodiment of the present invention provides a fourth possible implementation manner of the third aspect, where the range hood further includes an alarm connected to the controller; and the controller is also used for generating alarm information after determining that the starting capacitor fails and triggering the alarm to carry out alarm prompt according to the alarm information.
With reference to the fourth possible implementation manner of the third aspect, an embodiment of the present invention provides a fifth possible implementation manner of the third aspect, where the range hood further includes a display panel connected to the controller; and the controller is also used for generating fault information after determining that the starting capacitor fails and sending the fault information to the display panel for display.
The embodiment of the invention has the following beneficial effects:
The embodiment of the application provides a capacitor fault detection method, a capacitor fault detection device and a range hood, wherein for a controller of the range hood, when a starting signal of a starting capacitor of the range hood is monitored, a pulse signal corresponding to the starting capacitor is obtained; judging whether the waveform of the pulse signal is matched with a preset waveform or not; if not, determining that the starting capacitor fails; and generating a switching signal to trigger a relay connected with the starting capacitor to switch the starting capacitor to a standby capacitor of the starting capacitor. The application can rapidly position the failure of the motor starting capacitor and switch to the standby capacitor, thereby avoiding potential safety hazard and improving the experience of users.
Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. The objectives and other advantages of the invention will be realized and attained by the structure particularly pointed out in the written description and drawings.
In order to make the above objects, features and advantages of the present invention more comprehensible, preferred embodiments accompanied with figures are described in detail below.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are needed in the description of the embodiments or the prior art will be briefly described, and it is obvious that the drawings in the description below are some embodiments of the present invention, and other drawings can be obtained according to the drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic diagram of a range hood according to an embodiment of the present invention;
fig. 2 is a schematic diagram of another range hood according to an embodiment of the present invention;
FIG. 3 is a flowchart of a method for detecting a capacitor fault according to an embodiment of the present invention;
fig. 4 is a circuit diagram of a method for detecting a capacitor fault according to an embodiment of the present invention;
Fig. 5 is a schematic diagram of a capacitive fault detection device according to an embodiment of the present invention;
Fig. 6 is a schematic diagram of an electronic device according to an embodiment of the present invention.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Aiming at the problems that the existing range hood is manually judged to be in fault, the motor capacitor is judged to be in fault in many times, and the power panel is possibly burnt out to cause fire hazard and bring potential safety hazard under the condition of some non-capacitor faults, the embodiment of the invention provides the capacitor fault detection method and device and the range hood, and the fault of the starting capacitor of the motor can be rapidly positioned and switched to the standby capacitor, so that the potential safety hazard is avoided, and the user experience is improved.
For the sake of understanding the present embodiment, a detailed description is first provided below of a method for detecting a capacitor fault according to an embodiment of the present invention.
Embodiment one:
The embodiment of the invention provides a range hood, as shown in fig. 1, the range hood comprises a controller 10, a first sampling circuit 20, a second sampling circuit 30, a phase comparator 40, a relay driving chip 50, a relay 60, a motor 70, a starting capacitor 81 and a standby capacitor 82 which are connected with the relay 60, wherein the starting capacitor 81 and the standby capacitor 82 are switched through the relay 60, and the relay 60 is also connected with the relay driving chip 50; the first sampling circuit 20 and the second sampling circuit 30 are connected to the controller 10 through the phase comparator 40, the input end of the relay driving chip 50 is connected to the controller 10, and the output end of the relay driving chip 50 is connected to the motor 70.
The first sampling circuit 20 is configured to collect and process the commercial signal to obtain a first pulse signal, and send the first pulse signal to the phase comparator 40; the second sampling circuit 30 is configured to collect and process the electrical signal output by the start capacitor 81, obtain a second pulse signal, and send the second pulse signal to the phase comparator 40; the phase comparator 40 is configured to receive the first pulse signal and the second pulse signal, generate a pulse signal corresponding to the start capacitor 81 according to the first pulse signal and the second pulse signal, and send the pulse signal corresponding to the start capacitor 81 to the controller 10, so that the controller 10 performs capacitive fault detection on the start capacitor 81 according to the received pulse signal.
In one possible embodiment, the first sampling circuit 20 is an optical coupling zero isolation sampling circuit, and is configured to convert the collected commercial electric signal into a first pulse signal; the first pulse signal is a zero-crossing pulse signal. The second sampling circuit 30 is an optocoupler isolation sampling circuit; one input end of the optocoupler isolation sampling circuit is connected to the starting capacitor 81 and the standby capacitor 82, and the other input end of the optocoupler isolation sampling circuit is connected to a zero line of the mains supply; the output end of the optical coupling isolation sampling circuit is connected to the phase comparator 40; the optocoupler isolation sampling circuit is used for generating a second pulse signal according to a zero line signal of the mains supply and an electric signal output by the motor 70 through the starting capacitor 81 or the standby capacitor 82.
The phase comparator 40 is an exclusive or gate comparator, and the exclusive or gate comparator processes the received first pulse signal and the second pulse signal, generates a pulse signal corresponding to the start capacitor 81, and sends the pulse signal to the controller 10, so that the controller 10 performs capacitor fault detection on the start capacitor 81 according to the received pulse signal, thereby quickly positioning capacitor faults, preventing potential safety hazards, and improving user experience and safety.
In another possible embodiment, the range hood further comprises an alarm connected with the controller 10; at this time, the controller 10 is further configured to generate alarm information after determining that the start capacitor 81 fails, and trigger an alarm to alarm according to the alarm information. Optionally, the alarm may be a voice alarm, such as a buzzer, so as to prompt the user in time, and the specific type of the alarm may be set according to the actual situation, which is not limited in the embodiment of the present invention.
In another possible embodiment, the range hood further includes a display panel connected to the controller 10; at this time, the controller 10 is further configured to generate fault information after determining that the start capacitor 81 is faulty, and send the fault information to the display panel for display. Specifically, the fault information includes but is not limited to fault code information, and the fault information is carried out through the display panel, so that a user can grasp the fault position of the motor in time, and further maintain the motor in time, and potential safety hazards are avoided, and safety is improved.
In addition, in practical application, the starting capacitor 81 is often easily damaged as a vulnerable component, so that the motor 70 cannot be started, and therefore, the problem is solved after the standby capacitor 82 is added to be switched. Specifically, after the starting capacitor 81 fails, the controller 10 is further configured to generate a switching instruction, and send the switching instruction to the relay driving chip 50, so that the relay driving chip 50 controls the relay 60 to be switched from the starting capacitor 81 to the standby capacitor 82 according to the switching instruction, thereby avoiding maintenance, preventing potential safety hazards, avoiding the situation that the range hood cannot be used due to the failure of the starting capacitor 81, and further improving the experience of a user. Note that, the relay driving chip 50 may be implemented by a transistor, etc., as long as the relay 60 can be driven to switch from the start capacitor 81 to the standby capacitor 82, which is not limited by the embodiment of the present invention.
After the controller 10 monitors that the starting capacitor 81 is switched, a restarting signal of the range hood is also generated to trigger the range hood to restart. Specifically, the controller 10 sends a restart signal to the relay driving chip 50, so that the relay driving chip 50 restarts the motor 70 according to the restart signal, and optionally, the relay driving chip 50 may also be connected to the motor 70 through a relay group, where the relay group includes a high gear relay, a middle gear relay, and a low gear relay, and the relay driving chip 50 specifically selects which gear relay driving motor 70 to start, which may be set according to practical application conditions.
For ease of understanding, this is illustrated herein. As shown in fig. 2, the optocoupler zero-crossing isolation sampling circuit (i.e., the first sampling circuit) converts the commercial electric signal into a zero-crossing pulse signal (i.e., the first pulse signal), and outputs the zero-crossing pulse signal to the phase comparator; the input end of the optical coupler isolation sampling circuit (namely a second sampling circuit) inputs an alternating current signal of the motor after the capacitor is started, processes the alternating current signal to obtain a second pulse signal with the same frequency and different phases as the mains supply, and sends the second pulse signal to the phase comparator; at the moment, the phase comparator receives zero crossing pulse signals and second pulse signals with phase differences, processes the zero crossing pulse signals and the second pulse signals, outputs pulse signals corresponding to the starting capacitors to the controller, so that the controller calculates phases according to the received pulse signals, matches the received pulse signals with preset waveforms, determines whether the starting capacitors fail according to matching results, and if the waveforms calculated by the controller are not matched with the preset waveforms, determines that the starting capacitors fail, the controller immediately sends a disconnection command to the relay driving chip, and the relay driving chip drives the relay group to disconnect with the motor; simultaneously generating a switching signal, and triggering a relay to switch a starting capacitor to a standby capacitor through a relay driving chip; the relay switching standby capacitor module comprises a starting capacitor, a standby capacitor and a relay. When the relay is switched to the standby capacitor, the controller regenerates a restarting signal of the range hood and sends the restarting signal to the relay driving chip, so that the relay driving chip restarts the motor according to the restarting signal, at the moment, the input end of the optical coupler isolation sampling circuit inputs an alternating current signal of the motor after passing through the standby capacitor and processes the alternating current signal to obtain a second pulse signal, the phase comparator processes the received zero crossing pulse signal and the second pulse signal and outputs a pulse signal corresponding to the standby capacitor to the controller, at the moment, if the waveform calculated by the controller is not matched with the preset waveform, the controller immediately generates alarm information and sends the alarm information to the alarm for alarm prompt, and meanwhile, the fault information is displayed through the display panel and the winding of the disconnected motor is protected, so that potential safety hazards are avoided, safety and maintenance convenience are improved, and user experience is improved.
On the basis of the embodiment, the embodiment of the invention also provides a capacitor fault detection method, wherein the execution main body is a controller of the range hood; as shown in fig. 3, the method comprises the steps of:
step S302, when a starting signal of a starting capacitor of the range hood is monitored, a pulse signal corresponding to the starting capacitor is obtained;
Specifically, after the starting capacitor of the range hood is started, an alternating current signal of the motor after the starting capacitor is input to the input end of the second sampling circuit, the alternating current signal is processed, a second pulse signal with the same frequency and different phases as the commercial electric signal is obtained, and the second pulse signal is sent to the phase comparator; meanwhile, the first sampling circuit converts the commercial electric signal into a first pulse signal, and sends the first pulse signal to the phase comparator, so that the phase comparator processes the received first pulse signal and the received second pulse signal with phase difference to obtain pulse signals corresponding to the starting capacitor, and sends the pulse signals to the controller, so that the controller performs fault detection on the starting capacitor according to the fault detection.
Step S304, judging whether the waveform of the pulse signal is matched with a preset waveform;
After receiving the pulse signal corresponding to the starting capacitor, the controller also matches the pulse signal with a pre-stored preset waveform, and judges whether the starting capacitor fails according to a matching result. Specifically, if the waveform of the pulse signal matches a preset waveform (for example, a waveform with a frequency of 100HZ and a pulse width of 5 ms), it is determined that the start capacitor fails, and if the waveform of the pulse signal does not match the preset waveform, it is determined that the start capacitor fails. It should be noted that the preset waveform may be set according to actual situations, and the embodiment of the present invention does not limit the present invention.
Step S306, if not, determining that the starting capacitor fails;
in step S308, a switching signal is generated to trigger a relay connected to the start capacitor to switch the start capacitor to the backup capacitor of the start capacitor.
Specifically, when the starting capacitor fails, the controller immediately sends a disconnection command to the relay driving chip, so that the relay driving chip drives the relay group to disconnect from the motor; meanwhile, a switching signal is generated, and the relay is triggered by the relay driving chip to switch the starting capacitor to the standby capacitor, so that potential safety hazards are avoided, and the safety of the motor is improved.
The application provides a capacitor fault detection method, a device and a range hood, wherein the method is applied to a controller of the range hood and comprises the following steps: when a starting signal of a starting capacitor of the range hood is monitored, a pulse signal corresponding to the starting capacitor is obtained; judging whether the waveform of the pulse signal is matched with a preset waveform or not; if not, determining that the starting capacitor fails; and generating a switching signal to trigger a relay connected with the starting capacitor to switch the starting capacitor to a standby capacitor of the starting capacitor. The application can rapidly position the failure of the motor starting capacitor and switch to the standby capacitor, thereby avoiding potential safety hazard and improving the experience of users.
In one possible embodiment, the method further comprises: and after the completion of the switch of the starting capacitor is monitored, generating a restarting signal of the range hood, and triggering the range hood to restart. Specifically, after the relay is switched to the standby capacitor, the controller regenerates the restart signal of the range hood and sends the restart signal to the relay driving chip, so that the relay driving chip restarts the motor according to the restart signal.
In another possible embodiment, the range hood further comprises an alarm connected with the controller; after determining that the start-up capacitance has failed, the method further comprises: generating alarm information, and triggering an alarm to carry out alarm prompt according to the alarm information.
In another possible embodiment, the range hood further includes a display screen connected to the controller; after determining that the start-up capacitance has failed, the method further comprises: generating fault information, and triggering a display screen to display according to the fault information so as to facilitate the user to maintain in time.
Therefore, when the starting capacitor breaks down, the phase difference exists between the phase after the starting capacitor is started and the phase before the starting capacitor, so that whether the starting capacitor is normal or not is accurately judged, the motor is rapidly positioned, the starting capacitor breaks down, and when the capacitor breaks down, the motor is timely controlled to stop working and is switched to the standby capacitor, so that the motor is restarted, maintenance is avoided, potential safety hazards are avoided, and the user experience is improved.
For ease of understanding, this is illustrated herein. As shown in fig. 4, the controller is a single chip microcomputer, the input end of the first acquisition circuit is connected with the live wire and the zero wire of the mains supply to acquire the mains supply, and the mains supply is processed by the optocoupler zero-crossing isolation sampling circuit to obtain a first pulse signal, the optocoupler zero-crossing isolation sampling circuit mainly comprises an optocoupler, a resistor and a capacitor, specifically, the live wire of the mains supply is connected with the positive electrode of a diode D5, the negative electrode of the diode D5 is connected with one end of a resistor R6, the zero wire of the mains supply is connected with one end of a resistor R7, the other end of the resistor R6 and the other end of the resistor R7 are both connected with the input end of the optocoupler U1, the output end of the optocoupler U1 is the base of a triode, the emitter of the triode is grounded, the collector of the triode is respectively connected with one end of a resistor R4, a resistor R5 and one end of a capacitor CC4, the other end of the capacitor CC4 is grounded, the resistor R4 is also connected with a 5V power supply, and the other end of the resistor R5 is connected with the input port I02 of a phase comparator U3, so that the first pulse signal is sent to the phase comparator U3.
One end of the input end of the optocoupler U2 in the second sampling circuit is connected with the starting capacitor CC3 and the standby capacitor CC6 through a resistor R1, the other end of the input end of the optocoupler U2 is connected with a zero line, so that an alternating current signal of the motor through the starting capacitor CC3 or the standby capacitor CC6 is collected conveniently, the base level of a triode at the output end of the optocoupler U2 is grounded, the collector electrode of the triode is connected with one end of the resistor R2, one end of the resistor R3 and one end of the capacitor CC2 respectively, the other end of the capacitor CC2 is grounded, the resistor R2 is connected with a 5V power supply, and the other end of the resistor R3 is connected with an input port I01 of the phase comparator U3, so that a second pulse signal is sent to the phase comparator U3.
In practical application, when a 90-degree phase difference exists between an auxiliary winding and a main winding of the single-phase asynchronous motor, a moment is generated, so that the motor rotates, when a positive half cycle of an AC (ALTERNATING CURRENT ) passes through a diode D1, a diode D2 and a diode D3, a voltage drop of more than 2.1V is generated, the voltage drop is added at two ends of a light emitting side of an optocoupler U2, the optocoupler U2 is conducted, a triode at an output end of the optocoupler U2 is conducted, and a singlechip detects a low level; when the AC negative half shaft is not conducted, the current is discharged through the diode D4, the triode at the output end of the optical coupler U2 is not conducted, and the singlechip detects high level; thus, the singlechip can detect pulse waveforms with the same frequency and different phases with the mains supply, namely a second pulse signal. The first pulse signal is a pulse signal of the same frequency and phase as the commercial power.
The phase comparator U3 comprises an exclusive-or gate, which processes the first pulse signal and the second pulse signal, outputs a third pulse signal, and sends the third pulse signal to the singlechip. The third pulse signal is processed by the phase comparator according to the received first pulse signal and the second pulse signal, so as to obtain a pulse signal corresponding to the starting capacitor or a pulse signal corresponding to the standby capacitor. Specifically, when pulse signals with different potentials are input, the output of the exclusive or gate is 1, when pulse signals with the same potential are input, the output of the exclusive or gate is 0, therefore, in the embodiment of the invention, when the first pulse signal and the second pulse signal are input to the phase comparator U3, the phase comparator U3 outputs a pulse waveform with the frequency of 100HZ and the pulse width of 5ms, if the preset waveform in the singlechip is a waveform with the frequency of 100HZ and the pulse width of 5ms, the singlechip matches the waveform of the received pulse signal with the preset waveform, if the matching is successful, the starting capacitor is normal, if the matching is not successful, the starting capacitor is failed, at the moment, the singlechip immediately sends a command to disconnect the relay group of the motor, meanwhile, a switching signal is sent to trigger the relay RY4 to be switched from the starting capacitor CC3 to the standby capacitor CC6, after the relay RY4 is switched to the standby capacitor CC6, the singlechip generates a restarting signal to trigger the motor of the range hood to restart, at the moment, if the singlechip judges whether a pulse signal corresponding to the received standby capacitor CC6 is matched with a preset waveform, if the pulse signal is not matched with the preset waveform, the singlechip judges that the motor is out of order, and immediately sends a command to the relay driving chip U6 to disconnect a relay group of the motor, wherein the relay RY1 is a high-gear relay, the relay RY2 is a medium-gear relay, and the relay RY3 is a low-gear relay; generating alarm information and fault information, and sending the alarm information to an alarm, so that the alarm such as a buzzer carries out alarm prompt according to the alarm information; meanwhile, fault information is sent to a display panel (namely a display screen) so that the display panel displays the fault information, wherein the fault information is fault code information and comprises fault code information corresponding to a start capacitor fault and fault code information corresponding to a motor fault, so that the start capacitor fault or the motor fault can be rapidly positioned, and the fault information is timely switched to a standby capacitor when the capacitor fault is started, maintenance is avoided, and when the motor fault occurs, a user can be reminded of timely maintenance through an alarm prompt and the fault code information corresponding to the motor fault, so that the user experience is improved.
Corresponding to the embodiment of the method, the embodiment of the invention also provides a capacitor fault detection device which is applied to a controller of the range hood; as shown in fig. 5, the device includes an acquisition module 501, a judgment module 502, a determination module 503, and a switching module 504 that are sequentially connected, where the functions of each module are as follows:
the acquisition module 501 is configured to acquire a pulse signal corresponding to a starting capacitor when the starting signal of the starting capacitor of the range hood is monitored;
a judging module 502, configured to judge whether the waveform of the pulse signal matches a preset waveform;
a determining module 503, configured to determine that the start capacitor fails when the determination result of the determining module is no;
the switching module 504 is configured to generate a switching signal to trigger a relay connected to the start capacitor to switch the start capacitor to a backup capacitor of the start capacitor.
According to the capacitor fault detection device provided by the embodiment of the application, when the starting signal of the starting capacitor of the range hood is monitored, a pulse signal corresponding to the starting capacitor is obtained; judging whether the waveform of the pulse signal is matched with a preset waveform or not; if not, determining that the starting capacitor fails; and generating a switching signal to trigger a relay connected with the starting capacitor to switch the starting capacitor to a standby capacitor of the starting capacitor. The application can rapidly position the failure of the motor starting capacitor and switch to the standby capacitor, thereby avoiding potential safety hazard and improving the experience of users.
In one possible embodiment, the above device is further used for: and after the completion of the switch of the starting capacitor is monitored, generating a restarting signal of the range hood, and triggering the range hood to restart.
In another possible implementation manner, the range hood further comprises an alarm connected with the controller; after determining that the start-up capacitor has failed, the device is further configured to: generating alarm information, and triggering an alarm to carry out alarm prompt according to the alarm information.
The capacitor fault detection device provided by the embodiment of the invention has the same technical characteristics as the capacitor fault detection method provided by the embodiment, so that the same technical problems can be solved, and the same technical effects can be achieved.
The embodiment of the invention also provides electronic equipment, which comprises a processor and a memory, wherein the memory stores machine executable instructions which can be executed by the processor, and the processor executes the machine executable instructions to realize the capacitance fault detection method.
Referring to fig. 6, the electronic device includes a processor 600 and a memory 601, the memory 601 storing machine executable instructions executable by the processor 600, the processor 600 executing the machine executable instructions to implement the above-described capacitance fault detection method.
Further, the electronic device shown in fig. 6 further comprises a bus 602 and a communication interface 603, and the processor 600, the communication interface 603 and the memory 601 are connected through the bus 602.
The memory 601 may include a high-speed random access memory (RAM, random Access Memory), and may further include a non-volatile memory (non-volatile memory), such as at least one disk memory. The communication connection between the system network element and at least one other network element is implemented via at least one communication interface 603 (which may be wired or wireless), which may use the internet, a wide area network, a local network, a metropolitan area network, etc. Bus 602 may be an ISA (IndustrialStandard Architecture, industry standard architecture) bus, PCI (PERIPHERAL COMPONENT INTERCONNECT, peripheral component interconnect standard) bus, or EISA (Enhanced Industry Standard Architecture, extended industry standard architecture) bus, among others. The buses may be classified into address buses, data buses, control buses, and the like. For ease of illustration, only one bi-directional arrow is shown in FIG. 6, but not only one bus or type of bus.
The processor 600 may be an integrated circuit chip with signal processing capabilities. In implementation, the steps of the methods described above may be performed by integrated logic circuitry in hardware or instructions in software in processor 600. The processor 600 may be a general-purpose processor, including a central processing unit (CentralProcessing Unit, CPU for short), a network processor (Network Processor, NP for short), etc.; but may also be a digital signal Processor (DIGITAL SIGNAL Processor, DSP), application Specific Integrated Circuit (ASIC), field-Programmable gate array (FPGA) or other Programmable logic device, discrete gate or transistor logic device, discrete hardware components. The disclosed methods, steps, and logic blocks in the embodiments of the present invention may be implemented or performed. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like. The steps of the method disclosed in connection with the embodiments of the present invention may be embodied directly in the execution of a hardware decoding processor, or in the execution of a combination of hardware and software modules in a decoding processor. The software modules may be located in a random access memory, flash memory, read only memory, programmable read only memory, or electrically erasable programmable memory, registers, etc. as well known in the art. The storage medium is located in the memory 601 and the processor 600 reads the information in the memory 601 and in combination with its hardware performs the steps of the method of the previous embodiments.
The present embodiment also provides a machine-readable storage medium storing machine-executable instructions that, when invoked and executed by a processor, cause the processor to implement the above-described capacitive fault detection method.
The computer program product of the capacitor fault detection method, the capacitor fault detection device and the electronic device provided by the embodiments of the present invention include a computer readable storage medium storing program codes, and instructions included in the program codes may be used to execute the method described in the foregoing method embodiment, and specific implementation may refer to the method embodiment and will not be repeated herein.
It can be clearly understood by those skilled in the art that, for convenience and brevity of description, the specific working process of the range hood described above may refer to the corresponding process of the capacitance fault detection method in the foregoing embodiment, which is not described herein again.
In addition, in the description of embodiments of the present invention, unless explicitly stated and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.
The functions, if implemented in the form of software functional units and sold or used as a stand-alone product, may be stored in a non-volatile computer readable storage medium executable by a processor. Based on this understanding, the technical solution of the present invention may be embodied essentially or in a part contributing to the prior art or in a part of the technical solution, in the form of a software product stored in a storage medium, comprising several instructions for causing a computer device (which may be a personal computer, a server, a network device, etc.) to perform all or part of the steps of the method according to the embodiments of the present invention. And the aforementioned storage medium includes: a usb disk, a removable hard disk, a Read-Only Memory (ROM), a random access Memory (RAM, random Access Memory), a magnetic disk, or an optical disk, or other various media capable of storing program codes.
In the description of the present invention, it should be noted that the directions or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present invention and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
Finally, it should be noted that: the above examples are only specific embodiments of the present invention, and are not intended to limit the scope of the present invention, but it should be understood by those skilled in the art that the present invention is not limited thereto, and that the present invention is described in detail with reference to the foregoing examples: any person skilled in the art may modify or easily conceive of the technical solution described in the foregoing embodiments, or perform equivalent substitution of some of the technical features, while remaining within the technical scope of the present disclosure; such modifications, changes or substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present invention, and are intended to be included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (8)
1. The range hood is characterized by comprising a controller, a first sampling circuit, a second sampling circuit, a phase comparator, a relay driving chip, a relay, a motor, a starting capacitor and a standby capacitor, wherein the starting capacitor and the standby capacitor are connected with the relay, the starting capacitor and the standby capacitor are switched through the relay, and the relay is also connected with the relay driving chip;
The first sampling circuit and the second sampling circuit are connected to the controller through the phase comparator, the input end of the relay driving chip is connected with the controller, and the output end of the relay driving chip is connected with the motor;
the first sampling circuit is used for collecting and processing the municipal electric signal to obtain a first pulse signal, and sending the first pulse signal to the phase comparator;
the second sampling circuit is used for collecting and processing the electric signal output by the starting capacitor to obtain a second pulse signal, and sending the second pulse signal to the phase comparator;
The phase comparator is used for receiving the first pulse signal and the second pulse signal, generating a pulse signal corresponding to the starting capacitor according to the first pulse signal and the second pulse signal, and sending the pulse signal corresponding to the starting capacitor to the controller;
the controller is used for executing a capacitance fault detection method so as to detect capacitance faults of the starting capacitor;
The capacitor fault detection method comprises the following steps:
When a starting signal of a starting capacitor of the range hood is monitored, acquiring a pulse signal corresponding to the starting capacitor;
judging whether the waveform of the pulse signal is matched with a preset waveform or not;
if not, determining that the starting capacitor fails;
and generating a switching signal to trigger a relay connected with the starting capacitor to switch the starting capacitor to a standby capacitor of the starting capacitor.
2. The range hood of claim 1, wherein the controller is further configured to:
And after the completion of the switching of the starting capacitor is monitored, generating a restarting signal of the range hood, and triggering the range hood to restart.
3. The range hood of claim 1, wherein the first sampling circuit is an optocoupler zero isolation sampling circuit for converting the collected mains signal into the first pulse signal.
4. The range hood of claim 1, wherein the second sampling circuit is an optocoupler isolation sampling circuit;
one input end of the optocoupler isolation sampling circuit is connected to the starting capacitor and the standby capacitor, and the other input end of the optocoupler isolation sampling circuit is connected to a zero line of the mains supply; the output end of the optocoupler isolation sampling circuit is connected to the phase comparator;
the optocoupler isolation sampling circuit is used for generating the second pulse signal according to the zero line signal of the mains supply and the electric signal output by the motor through the starting capacitor or the standby capacitor.
5. The range hood of claim 1 wherein the phase comparator is an exclusive or gate comparator.
6. The range hood of claim 1, further comprising an alarm coupled to the controller;
and the controller is also used for generating alarm information after determining that the starting capacitor fails and triggering the alarm to carry out alarm prompt according to the alarm information.
7. The range hood of claim 1, further comprising a display panel coupled to the controller;
and the controller is also used for generating fault information after determining that the starting capacitor breaks down, and sending the fault information to the display panel for display.
8. A capacitive failure detection device, characterized by being applied to the controller of the range hood of claim 1; the device comprises:
The acquisition module is used for acquiring a pulse signal corresponding to the starting capacitor when the starting signal of the starting capacitor of the range hood is monitored;
The judging module is used for judging whether the waveform of the pulse signal is matched with a preset waveform or not;
The determining module is used for determining that the starting capacitor fails when the judging result of the judging module is negative;
And the switching module is used for generating a switching signal so as to trigger a relay connected with the starting capacitor to switch the starting capacitor to a standby capacitor of the starting capacitor.
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009265043A (en) * | 2008-04-29 | 2009-11-12 | Ngk Spark Plug Co Ltd | Abnormality detector for capacitance sensor |
| CN108733611A (en) * | 2018-05-22 | 2018-11-02 | 联想(北京)有限公司 | A kind of method of control electronics, electronic equipment and computer storage media |
Family Cites Families (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3718977B2 (en) * | 1997-12-25 | 2005-11-24 | 株式会社明電舎 | Sampling synchronization method |
| JP4039156B2 (en) * | 2002-07-18 | 2008-01-30 | 日産自動車株式会社 | Fault diagnosis device for ground fault detection circuit |
| JP2007116677A (en) * | 2005-09-21 | 2007-05-10 | Semiconductor Energy Lab Co Ltd | Cyclic redundancy check circuit, semiconductor device having cyclic redundancy check circuit, electronic device having the semiconductor device, and wireless communication system using the semiconductor device |
| JP2009259726A (en) * | 2008-04-21 | 2009-11-05 | Panasonic Corp | Heating cooker |
| JP4869284B2 (en) * | 2008-04-23 | 2012-02-08 | 三菱電機株式会社 | AC / DC converter, and compressor drive device, compressor and air conditioner using the AC / DC converter |
| EP2309635B1 (en) * | 2008-08-01 | 2019-09-25 | Mitsubishi Electric Corporation | Ac-dc converter, ac-dc converter control method, motor driving device, compressor driving device, air conditioner, and heat pump-type hot-water supply device |
| US8575941B2 (en) * | 2009-09-08 | 2013-11-05 | Schweitzer Engineering Laboratories Inc | Apparatus and method for identifying a faulted phase in a shunt capacitor bank |
| CN201674214U (en) * | 2010-04-29 | 2010-12-15 | 山东电力集团公司济南供电公司 | Capacitor protector |
| JP6739384B2 (en) * | 2017-03-27 | 2020-08-12 | 三菱電機株式会社 | Failure point locator |
| CN109373567B (en) * | 2018-11-02 | 2023-10-13 | 华帝股份有限公司 | Flue blockage protection device and detection method for gas water heater |
| US11519954B2 (en) * | 2019-08-27 | 2022-12-06 | Analog Devices International Unlimited Company | Apparatus and method to achieve fast-fault detection on power semiconductor devices |
| CN210724175U (en) * | 2019-12-02 | 2020-06-09 | 云南电网有限责任公司文山供电局 | Fault detection device based on high-frequency rectification module |
| CN212588204U (en) * | 2020-08-17 | 2021-02-23 | 广东风准电机有限公司 | Special capacitor motor for axial flow fan |
| CN214380292U (en) * | 2021-02-05 | 2021-10-08 | 新三科技有限公司 | Automatic starter of oil engine |
-
2021
- 2021-11-04 CN CN202111299243.6A patent/CN114019283B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009265043A (en) * | 2008-04-29 | 2009-11-12 | Ngk Spark Plug Co Ltd | Abnormality detector for capacitance sensor |
| CN108733611A (en) * | 2018-05-22 | 2018-11-02 | 联想(北京)有限公司 | A kind of method of control electronics, electronic equipment and computer storage media |
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