CN114019283A - Capacitance fault detection method and device and range hood - Google Patents
Capacitance fault detection method and device and range hood Download PDFInfo
- Publication number
- CN114019283A CN114019283A CN202111299243.6A CN202111299243A CN114019283A CN 114019283 A CN114019283 A CN 114019283A CN 202111299243 A CN202111299243 A CN 202111299243A CN 114019283 A CN114019283 A CN 114019283A
- Authority
- CN
- China
- Prior art keywords
- capacitor
- starting capacitor
- pulse signal
- range hood
- starting
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000001514 detection method Methods 0.000 title claims abstract description 36
- 239000003990 capacitor Substances 0.000 claims abstract description 192
- 238000000034 method Methods 0.000 claims abstract description 35
- 238000005070 sampling Methods 0.000 claims description 52
- 230000003287 optical effect Effects 0.000 claims description 28
- 230000008878 coupling Effects 0.000 claims description 23
- 238000010168 coupling process Methods 0.000 claims description 23
- 238000005859 coupling reaction Methods 0.000 claims description 23
- 238000002955 isolation Methods 0.000 claims description 23
- 238000012545 processing Methods 0.000 claims description 6
- 230000008569 process Effects 0.000 description 8
- 238000012423 maintenance Methods 0.000 description 5
- 238000004891 communication Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 238000004804 winding Methods 0.000 description 3
- 230000006870 function Effects 0.000 description 2
- 230000001960 triggered effect Effects 0.000 description 2
- 239000006096 absorbing agent Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 238000004590 computer program Methods 0.000 description 1
- 238000003745 diagnosis Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000006233 lamp black Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Images
Classifications
-
- 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
-
- 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
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Control Of Electric Motors In General (AREA)
- Control Of Ac Motors In General (AREA)
Abstract
The invention provides a capacitance fault detection method, a capacitance fault detection device and a range hood, wherein the capacitance fault detection 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, 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 has a fault; and generating a switching signal to trigger a relay connected with the starting capacitor to switch the starting capacitor to the spare capacitor of the starting capacitor. According to the method and the device, the motor starting capacitor can be rapidly positioned to break down, and the standby capacitor is switched, so that potential safety hazards are avoided, and the user experience is improved.
Description
Technical Field
The invention relates to the technical field of motor fault diagnosis, in particular to a capacitance fault detection method and device and a range hood.
Background
At present, with the increase of household appliances, the failure rate is also gradually increased, and the safety is also more important. The kitchen is a gathering place of various electrical appliances, and is used as a necessary range hood of the kitchen, the fault rate of the range hood is slowly increased, when the range hood breaks down, most of the existing methods are judged through experience, the motor capacitor fault is judged in many times, and under the condition of certain non-capacitor faults, if the motor fault occurs, a power panel can be burnt out, so that fire disasters are caused, and potential safety hazards are brought.
Disclosure of Invention
In view of this, the present invention provides a method and an apparatus for detecting a capacitor fault, and a range hood, which can quickly locate a fault occurring in a starting capacitor of a motor and switch to a standby capacitor, thereby avoiding a potential safety hazard and improving user experience.
In a first aspect, an embodiment of the present invention provides a capacitance fault detection method, 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, 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 has a fault; and generating a switching signal to trigger a relay connected with the starting capacitor to switch the starting capacitor to the spare 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 when the switching of the starting capacitor is monitored to be completed, generating a restarting signal of the range hood, and triggering the range hood to restart.
With reference to the first aspect, an 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 determining that the starting capacitor is failed, the method further comprises: and generating alarm information, and triggering an alarm to give an alarm prompt according to the alarm information.
In a second aspect, an embodiment of the present invention further provides a capacitance fault detection apparatus, which is applied to a controller of a range hood; the device includes: the acquisition module is used for acquiring a pulse signal corresponding to a 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 has a fault 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 the spare capacitor of the starting capacitor.
In a third aspect, an embodiment of the present invention further provides a range hood, where the range hood includes a controller, a first sampling circuit, a second sampling circuit, a phase comparator, a relay driving chip, a relay, a motor, and a starting capacitor and a backup capacitor connected to the relay, where the starting capacitor and the backup capacitor are switched by the relay, and the relay is further connected to 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 acquiring and processing a mains supply 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 execute the capacitance fault detection method of the first aspect to perform capacitance fault detection on the starting capacitor.
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 optical coupling zero crossing isolation sampling circuit, and is configured to convert the collected mains 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 optical coupling 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 commercial power; 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 commercial power 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, wherein 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 the starting capacitor is determined to be in fault, and triggering the alarm to give an 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 has a fault, and sending the fault information to the display panel for displaying.
The embodiment of the invention has the following beneficial effects:
the embodiment of the invention provides a capacitance fault detection method and 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 has a fault; and generating a switching signal to trigger a relay connected with the starting capacitor to switch the starting capacitor to the spare capacitor of the starting capacitor. According to the method and the device, the motor starting capacitor can be rapidly positioned to break down, and the standby capacitor is switched, so that potential safety hazards are avoided, and the user experience is improved.
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 aforementioned and other objects, features and advantages of the present invention 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 used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.
Fig. 1 is a schematic view of a range hood provided by an embodiment of the present invention;
fig. 2 is a schematic view of another range hood provided by the embodiment of the invention;
fig. 3 is a flowchart of a method for detecting a capacitive fault according to an embodiment of the present invention;
FIG. 4 is a circuit diagram of a method for detecting a capacitive fault according to an embodiment of the present invention;
fig. 5 is a schematic diagram of a capacitance fault detection apparatus 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
To make the objects, technical solutions and advantages of the embodiments of the present invention clearer, 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, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The embodiment of the invention provides a capacitance fault detection method, a device and a range hood, which can quickly position the fault of a starting capacitor of a motor and switch to a standby capacitor, thereby avoiding potential safety hazards and improving user experience.
To facilitate understanding of the present embodiment, a method for detecting a capacitive fault according to an embodiment of the present invention will be described in detail below.
The first embodiment is as follows:
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 a mains 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 to 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 capacitance 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-crossing isolation sampling circuit, and is configured to convert the collected mains signal into a first pulse signal; the first pulse signal is a zero-crossing pulse signal. The second sampling circuit 30 is an optical coupling isolation sampling circuit; one input end of the optical coupling isolation sampling circuit is connected to the starting capacitor 81 and the standby capacitor 82, and the other input end of the optical coupling isolation sampling circuit is connected to the zero line of the commercial power; the output end of the optical coupling isolation sampling circuit is connected to a phase comparator 40; the optical coupling isolation sampling circuit is used for generating a second pulse signal according to a zero line signal of commercial power and an electric signal output by the motor 70 through the starting capacitor 81 or the standby capacitor 82.
Wherein, phase comparator 40 is the exclusive-or gate comparator, and this exclusive-or gate comparator handles the first pulse signal and the second pulse signal that receive, generates the pulse signal that starts electric capacity 81 and corresponds to send this pulse signal to controller 10, so that controller 10 carries out the electric capacity fault detection to starting electric capacity 81 according to the pulse signal that receives, thereby can fix a position electric capacity trouble fast, prevent the potential safety hazard, improve user's experience and security.
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 an alarm message after determining that the starting capacitor 81 fails, and trigger the alarm to give an alarm according to the alarm message. Optionally, the alarm may be a voice alarm, such as a buzzer, so as to prompt a user in time, and a specific type of the alarm may be set according to an actual situation, which is not limited in the embodiment of the present invention.
In another possible embodiment, the range hood further comprises a display panel connected to the controller 10; at this time, the controller 10 is also configured to generate failure information after determining that the starting capacitor 81 has failed, and transmit the failure 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 displayed on the display panel, so that a user can timely master the fault position of the motor and timely maintain the motor, potential safety hazards are avoided, and safety is improved.
In addition, in practical application, the starting capacitor 81 as a vulnerable part is often easily damaged to cause the motor 70 not to be started, so that the problem is solved after the switching of the backup capacitor 82 is added. Specifically, after starting electric capacity 81 breaks down, controller 10 still is used for generating switching instruction to switching instruction sends switching instruction to relay driver chip 50, so that relay driver chip 50 switches to spare electric capacity 82 by starting electric capacity 81 according to switching instruction control relay 60, thereby can avoid the maintenance, prevents the potential safety hazard, has avoided the lampblack absorber to break down because of starting electric capacity 81 and has leaded to the condition that can not use, and then has improved user's experience degree. It should be noted that the relay driving chip 50 may also be implemented by a triode or the like, as long as the relay 60 can be driven to switch from the start capacitor 81 to the backup capacitor 82, which is not limited in the embodiment of the present invention.
When the controller 10 monitors that the switching of the starting capacitor 81 is completed, 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 drives the motor 70 to restart according to the restart signal, 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 drives the motor 70 to start, and may be set according to an actual application condition, which is not limited in the embodiment of the present invention.
This is illustrated here for ease of understanding. As shown in fig. 2, the optical coupling zero-crossing isolation sampling circuit (i.e., the first sampling circuit) converts the commercial power signal into a zero-crossing pulse signal (i.e., the first pulse signal), and outputs the zero-crossing pulse signal to the phase comparator; an alternating current signal of a motor after a capacitor is started is input to the input end of an optical coupling isolation sampling circuit (namely a second sampling circuit), the alternating current signal is processed to obtain a second pulse signal with the same frequency as a mains supply signal and different phases, and the second pulse signal is sent to a phase comparator; the phase comparator receives a zero-crossing pulse signal and a second pulse signal with a phase difference, processes the two signals and outputs a pulse signal corresponding to the starting capacitor to the controller, so that the controller can calculate the phase according to the received pulse signal and match the pulse signal with a preset waveform, and determines whether the starting capacitor fails according to a matching result; 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; the relay switching standby capacitor module comprises a starting capacitor, a standby capacitor and a relay. When the relay is switched to the spare 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, an alternating current signal of the motor passing through the spare capacitor is input into the input end of the optical coupling isolation sampling circuit and is processed to obtain a second pulse signal, the phase comparator processes the received zero-crossing pulse signal and the second pulse signal and outputs the pulse signal corresponding to the spare capacitor to the controller, at the moment, if the waveform obtained by calculation of the controller is not matched with the preset waveform, the controller immediately generates alarm information and sends the alarm information to an alarm for alarm prompt, and the fault information is displayed through a display panel, and meanwhile, the winding of the motor is disconnected for protection, thereby avoiding potential safety hazards and improving safety and maintenance convenience, and then the experience degree of the user is improved.
On the basis of the above embodiment, the embodiment of the present invention further provides a capacitance fault detection method, wherein the execution main body is a controller of a 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 a starting capacitor of the range hood is started, an alternating current signal of the motor after the capacitor is started is input to the input end of the second sampling circuit, the alternating current signal is processed to obtain a second pulse signal with the same frequency as a mains supply signal and different phases, and the second pulse signal is sent to the phase comparator; meanwhile, the first sampling circuit converts the commercial power 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 the phase difference to obtain a pulse signal corresponding to the starting capacitor, and sends the pulse signal to the controller, so that the controller performs fault detection on the starting capacitor.
Step S304, judging whether the waveform of the pulse signal is matched with a preset waveform;
and 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 (e.g., a waveform having a frequency of 100HZ and a pulse width of 5 ms), it is determined that the start capacitor is not failed, and if the waveform of the pulse signal does not match the preset waveform, it is determined that the start capacitor is failed. 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 this.
Step S306, if not, determining that the starting capacitor has a fault;
step S308, a switching signal is generated to trigger a relay connected with the starting capacitor to switch the starting capacitor to a spare capacitor of the starting 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 be disconnected from the motor; and 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 invention provides a capacitance fault detection method, a capacitance fault detection device and a range hood, wherein the capacitance fault detection 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, 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 has a fault; and generating a switching signal to trigger a relay connected with the starting capacitor to switch the starting capacitor to the spare capacitor of the starting capacitor. According to the method and the device, the motor starting capacitor can be rapidly positioned to break down, and the standby capacitor is switched, so that potential safety hazards are avoided, and the user experience is improved.
In one possible embodiment, the method further comprises: and when the switching of the starting capacitor is monitored to be completed, generating a restarting signal of the range hood, and triggering the range hood to restart. Specifically, after the relay is switched to the backup 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, which may specifically refer to the foregoing embodiment.
In another possible embodiment, the range hood further comprises an alarm connected with the controller; after determining that the starting capacitor is faulty, the method further comprises: and generating alarm information, and triggering an alarm to give an alarm prompt according to the alarm information.
In another possible embodiment, the range hood further comprises a display screen connected with the controller; after determining that the starting capacitor is faulty, the method further comprises: and generating fault information, and triggering a display screen to display according to the fault information so as to facilitate the timely maintenance of a user.
Therefore, when starting capacitor and breaking down, there is the phase difference through phase place before phase place and the start capacitor after the start capacitor starts to carry out accurate judgement start capacitor and whether normal to quick location motor start capacitor breaks down, and when the capacitor breaks down, in time control motor stop work, and switch to reserve capacitor, so that restart motor, thereby avoid the maintenance, avoided the potential safety hazard, improved user's experience degree.
This is illustrated here for ease of understanding. As shown in fig. 4, the controller is a single chip, an input end of the first acquisition circuit is connected to a live wire and a zero wire of a commercial power to acquire a commercial power signal, and the commercial power signal is processed by the optical coupling zero crossing isolation sampling circuit to obtain a first pulse signal, where the optical coupling zero crossing isolation sampling circuit mainly includes an optical coupler, a resistor and a capacitor, specifically, the live wire of the commercial power is connected to an anode of a diode D5, a cathode of a diode D5 is connected to one end of a resistor R6, a zero wire of the commercial power is connected to one end of a resistor R7, the other end of the resistor R6 and the other end of the resistor R7 are both connected to an input end of an optical coupling U1, an output end of the optical coupling U1 is a base of a triode, an emitter of the triode is grounded, a collector of the triode is respectively connected to one end of the resistor R4, the resistor R5 and the capacitor CC4, the other end of the capacitor CC4 is grounded, the resistor R4 is further connected to a 5V power supply, and the other end of the resistor R5 is connected to an input port I02 of the phase comparator U3, thereby sending the first pulse signal to phase comparator U3.
One end of the input end of the optical coupler U2 in the second sampling circuit is connected with a starting capacitor CC3 and a spare capacitor CC6 through a resistor R1, the other end of the input end of the optical coupler U2 is connected with a zero line, so that alternating current signals of a motor passing through the starting capacitor CC3 or the spare capacitor CC6 can be collected conveniently, the base level of a triode at the output end of the optical coupler U2 is connected, the emitting electrode of the triode is grounded, the collector electrode of the triode is connected with one end of a resistor R2, one end of a resistor R3 and one end of a capacitor CC2 are connected respectively, the other end of the capacitor CC2 is grounded, the resistor R2 is also connected with a 5V power supply, the other end of the resistor R3 is connected with an input port I01 of a phase comparator U3, and a second pulse signal is sent to the phase comparator U3.
In practical application, when a phase difference of 90 degrees exists between an auxiliary winding and a main winding of a single-phase asynchronous motor, a generated torque is generated, so that the motor rotates, when a voltage drop of more than 2.1V is generated when a positive half cycle of AC (Alternating Current) passes through a diode D1, a diode D2 and a diode D3, the voltage drop is applied to 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 in the state of non-conduction, the optocoupler U2 is in non-conduction, current is discharged through the diode D4, the triode at the output end of the optocoupler U2 is in non-conduction, and the single chip microcomputer detects a high level; therefore, the singlechip can detect the pulse waveform with the same frequency as the commercial power and different phases, namely a second pulse signal. In addition, the first pulse signal is a pulse signal with the same frequency and the same phase as the commercial power.
The phase comparator U3 includes an exclusive or gate that processes the first pulse signal and the second pulse signal, and outputs a third pulse signal, and sends the third pulse signal to the single chip microcomputer. The third pulse signal is processed by the phase comparator according to the received first pulse signal and the second pulse signal, and a pulse signal corresponding to the starting capacitor or a pulse signal corresponding to the spare capacitor is obtained. Specifically, when pulse signals with different potentials are input, the output of the exclusive or gate is 1, and 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 a first pulse signal and a second pulse signal are input to the phase comparator U3, the phase comparator U3 outputs a pulse waveform with a frequency of 100HZ and a pulse width of 5ms, if the preset waveform in the single chip is a waveform with a frequency of 100HZ and a pulse width of 5ms, the single chip 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 matched, the starting capacitor is failed, at the moment, the single chip immediately sends a command to disconnect the relay group of the motor, and simultaneously sends a switching signal to trigger the relay 4 to be switched from the starting capacitor CC3 to the RY capacitor CC6, and after the relay 4 is switched to the RY capacitor CC6, the single chip microcomputer generates a restarting signal to trigger a motor of the range hood to restart, at the moment, if the single chip microcomputer judges whether a received pulse signal corresponding to the backup capacitor CC6 is matched with a preset waveform, if the pulse signal is not matched with the preset waveform, the single chip microcomputer judges that the motor has a fault, and immediately sends a command to the relay driving chip U6 to disconnect a relay group connected with the motor, wherein the relay RY1 is a high-gear relay, the relay RY2 is a middle-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, gives an alarm prompt according to the alarm information; simultaneously, with fault information transmission to display panel (being the display screen), so that the display panel shows fault information, here fault information is fault code information, include alone not only being limited to the fault code information that starts the capacitor fault correspondence and the fault code information that the motor fault corresponds, thereby not only can fix a position start capacitor fault or motor fault fast, and in time switch over to reserve capacitor when starting capacitor fault, be free from the maintenance, when motor fault takes place, can also remind the user in time to maintain through warning suggestion and the fault code information that the motor fault corresponds, thereby user's experience degree has been improved.
Corresponding to the embodiment of the method, the embodiment of the invention also provides a capacitance fault detection device which is applied to a controller of a range hood; as shown in fig. 5, the apparatus includes an obtaining module 501, a judging module 502, a determining module 503, and a switching module 504, which are connected in sequence, where functions of the modules are as follows:
the acquisition module 501 is configured to acquire a pulse signal corresponding to a start capacitor when a start signal of the start capacitor of the range hood is monitored;
a judging module 502, configured to judge whether a waveform of the pulse signal matches a preset waveform;
a determining module 503, configured to determine that the starting capacitor fails when the determination result of the determining module is negative;
and a switching module 504, 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 capacitance fault detection device provided by the embodiment of the invention, when a starting signal of a starting capacitor of a 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 has a fault; and generating a switching signal to trigger a relay connected with the starting capacitor to switch the starting capacitor to the spare capacitor of the starting capacitor. According to the method and the device, the motor starting capacitor can be rapidly positioned to break down, and the standby capacitor is switched, so that potential safety hazards are avoided, and the user experience is improved.
In one possible embodiment, the above apparatus is further configured to: and when the switching of the starting capacitor is monitored to be completed, generating a restarting signal of the range hood, and triggering the range hood to restart.
In another possible implementation mode, the range hood further comprises an alarm connected with the controller; after determining that the starting capacitor is failed, the apparatus is further configured to: and generating alarm information, and triggering an alarm to give an alarm prompt according to the alarm information.
The capacitance fault detection device provided by the embodiment of the invention has the same technical characteristics as the capacitance 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 capable of being 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 stores machine executable instructions capable of being executed by the processor 600, and the processor 600 executes the machine executable instructions to implement the capacitance fault detection method described above.
Further, the electronic device shown in fig. 6 further includes 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) and may further include a non-volatile Memory (non-volatile Memory), such as at least one disk Memory. The communication connection between the network element of the system and at least one other network element is implemented through at least one communication interface 603 (which may be wired or wireless), and the internet, a wide area network, a local network, a metropolitan area network, and the like may be used. The bus 602 may be an ISA (Industry Standard Architecture) bus, a PCI (Peripheral Component Interconnect) bus, an EISA (Enhanced Industry Standard Architecture) bus, or the like. The above-mentioned bus may be classified into an address bus, a data bus, a control bus, and the like. For ease of illustration, only one double-headed arrow is shown in FIG. 6, but that does not indicate only one bus or one type of bus.
Processor 600 may be an integrated circuit chip having signal processing capabilities. In implementation, the steps of the above method may be performed by integrated logic circuits of hardware or instructions in the form of software in the processor 600. The Processor 600 may be a general-purpose Processor, and includes a Central Processing Unit (CPU), a Network Processor (NP), and the like; the device can also be a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), a Field Programmable Gate Array (FPGA) or other Programmable logic device, a discrete Gate or transistor logic device, or a discrete hardware component. The various methods, steps and logic blocks disclosed 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 directly implemented by a hardware decoding processor, or implemented by a combination of hardware and software modules in the decoding processor. The software module may be located in ram, flash memory, rom, prom, or eprom, registers, etc. storage media as is 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 completes the steps of the method of the foregoing embodiment in combination with the hardware thereof.
The present embodiments also provide a machine-readable storage medium having stored thereon machine-executable instructions that, when invoked and executed by a processor, cause the processor to implement the capacitance fault detection method described above.
The capacitance fault detection method, the capacitance fault detection device, and the computer program product of the electronic device provided in the embodiments of the present invention include a computer-readable storage medium storing a program code, where instructions included in the program code may be used to execute the method described in the foregoing method embodiments, and specific implementations may refer to the method embodiments and are not described herein again.
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, and is not described herein again.
In addition, in the description of the embodiments of the present invention, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled 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 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 and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the method according to the embodiments of the present invention. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk, and other various media capable of storing program codes.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular 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-mentioned embodiments are only specific embodiments of the present invention, which are used for illustrating the technical solutions of the present invention and not for limiting the same, and the protection scope of the present invention is not limited thereto, although the present invention is described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: any person skilled in the art can modify or easily conceive the technical solutions described in the foregoing embodiments or equivalent substitutes for some technical features within the technical scope of the present disclosure; such modifications, changes or substitutions do not depart from the spirit and scope of the embodiments of the present invention, and they should be construed as being included therein. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (10)
1. A capacitance fault detection method is characterized by being 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, 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 has a fault;
and generating a switching signal to trigger a relay connected with the starting capacitor to switch the starting capacitor to a spare capacitor of the starting capacitor.
2. The capacitive fault detection method of claim 1, further comprising:
and when the starting capacitor is monitored to be switched, generating a restarting signal of the range hood, and triggering the range hood to restart.
3. The capacitive fault detection method of claim 1, wherein the range hood further comprises an alarm connected to the controller; after determining that the starting capacitor is faulty, the method further comprises:
and generating alarm information, and triggering the alarm to give an alarm prompt according to the alarm information.
4. A capacitance fault detection device is characterized by being applied to a controller of a range hood; the device comprises:
the acquisition module is used for acquiring a pulse signal corresponding to a starting capacitor of the range hood when the starting signal of the starting capacitor 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 the spare capacitor of the starting capacitor.
5. A 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 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 a mains supply 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 the electric signal output by the starting capacitor, processing the electric signal 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 the capacitance fault detection method of any one of the claims 1 to 3 to perform capacitance fault detection on the starting capacitor.
6. The range hood of claim 5, wherein the first sampling circuit is an optocoupler zero-crossing isolation sampling circuit configured to convert the collected mains signal into the first pulse signal.
7. The range hood of claim 5, wherein the second sampling circuit is an opto-coupler 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 commercial power; 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 the second pulse signal according to a zero line signal of commercial power and an electric signal output by the motor via the starting capacitor or the standby capacitor.
8. A range hood as claimed in claim 5, characterized in that the phase comparator is an exclusive OR gate comparator.
9. The range hood of claim 5, further comprising an alarm connected to the controller;
the controller is further used for generating alarm information after the starting capacitor is determined to be in fault, and triggering the alarm to give an alarm prompt according to the alarm information.
10. A range hood as set forth in claim 9, further comprising a display panel connected to said controller;
and the controller is also used for generating fault information after determining that the starting capacitor has a fault, and sending the fault information to the display panel for displaying.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111299243.6A CN114019283B (en) | 2021-11-04 | 2021-11-04 | Capacitive fault detection method and device and range hood |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111299243.6A CN114019283B (en) | 2021-11-04 | 2021-11-04 | Capacitive fault detection method and device and range hood |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114019283A true CN114019283A (en) | 2022-02-08 |
| CN114019283B CN114019283B (en) | 2024-06-21 |
Family
ID=80060973
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111299243.6A Active CN114019283B (en) | 2021-11-04 | 2021-11-04 | Capacitive fault detection method and device and range hood |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114019283B (en) |
Citations (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11191919A (en) * | 1997-12-25 | 1999-07-13 | Meidensha Corp | Sampling synchronizing system |
| JP2004053367A (en) * | 2002-07-18 | 2004-02-19 | Nissan Motor Co Ltd | Diagnostic 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 |
| JP2009268201A (en) * | 2008-04-23 | 2009-11-12 | Mitsubishi Electric Corp | Ac-dc converter and compressor drive device, compressor and air conditioner using the ac-dc converter |
| JP2009265043A (en) * | 2008-04-29 | 2009-11-12 | Ngk Spark Plug Co Ltd | Abnormality detector for capacitance sensor |
| CN201674214U (en) * | 2010-04-29 | 2010-12-15 | 山东电力集团公司济南供电公司 | Capacitor protector |
| US20110057661A1 (en) * | 2009-09-08 | 2011-03-10 | Satish Samineni | Apparatus and method for identifying a faulted phase in a shunt capacitor bank |
| US20110101898A1 (en) * | 2008-08-01 | 2011-05-05 | Yosuke Shinomoto | Ac-dc converter, method of controlling the same, motor driver, compressor driver, air-conditioner, and heat pump type water heater |
| JP2018163065A (en) * | 2017-03-27 | 2018-10-18 | 三菱電機株式会社 | Fault locator |
| 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 |
| CN109373567A (en) * | 2018-11-02 | 2019-02-22 | 华帝股份有限公司 | Flue blockage protection device and detection method for gas water heater |
| 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 |
| CN214067318U (en) * | 2019-08-27 | 2021-08-27 | 亚德诺半导体国际无限责任公司 | Fault detection circuit for power transistor |
| 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 (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11191919A (en) * | 1997-12-25 | 1999-07-13 | Meidensha Corp | Sampling synchronizing system |
| JP2004053367A (en) * | 2002-07-18 | 2004-02-19 | Nissan Motor Co Ltd | Diagnostic 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 |
| JP2009268201A (en) * | 2008-04-23 | 2009-11-12 | Mitsubishi Electric Corp | Ac-dc converter and compressor drive device, compressor and air conditioner using the ac-dc converter |
| JP2009265043A (en) * | 2008-04-29 | 2009-11-12 | Ngk Spark Plug Co Ltd | Abnormality detector for capacitance sensor |
| US20110101898A1 (en) * | 2008-08-01 | 2011-05-05 | Yosuke Shinomoto | Ac-dc converter, method of controlling the same, motor driver, compressor driver, air-conditioner, and heat pump type water heater |
| US20110057661A1 (en) * | 2009-09-08 | 2011-03-10 | Satish Samineni | 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 |
| JP2018163065A (en) * | 2017-03-27 | 2018-10-18 | 三菱電機株式会社 | Fault locator |
| 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 |
| CN109373567A (en) * | 2018-11-02 | 2019-02-22 | 华帝股份有限公司 | Flue blockage protection device and detection method for gas water heater |
| CN214067318U (en) * | 2019-08-27 | 2021-08-27 | 亚德诺半导体国际无限责任公司 | Fault detection circuit for power transistor |
| 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 |
Non-Patent Citations (5)
| Title |
|---|
| 刘忠富;刘忠强;杨亚宁;: "基于多CPU控制的高压防爆开关综合保护系统的研究", 工矿自动化, no. 06, 10 December 2008 (2008-12-10) * |
| 刘文;: "油烟机常见故障检修笔记", 家电检修技术, no. 04, 1 April 2013 (2013-04-01), pages 239 * |
| 张培君: "交流电容器常见故障的分析", 家庭电子, no. 09, 1 May 2005 (2005-05-01), pages 59 * |
| 陈孝敏: "全自动吸油烟机典型故障分析及维修", 家用电器, 15 June 1996 (1996-06-15) * |
| 顾水方: "电容式单相电动机的检修", 微电机, no. 04, 25 December 1995 (1995-12-25), pages 58 - 59 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN114019283B (en) | 2024-06-21 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| AU2010279835A1 (en) | Home appliance and method for operating the same | |
| CN208872819U (en) | A kind of high-voltage interlocking fault detection means | |
| JP2011100347A (en) | Power supply device, power receiving device, power supply system, and method of recovering from fault | |
| CN101387690A (en) | Health monitoring of power converter fans and electric motors | |
| JP4039156B2 (en) | Fault diagnosis device for ground fault detection circuit | |
| CN104494538A (en) | False-start-prevention control policy for electric vehicle | |
| CN105606950A (en) | Diagnosis method and diagnosis system for voltage sampling line fault of battery management system | |
| CN109342935A (en) | Device and method for detecting failure of direct-current bus charging circuit relay and motor | |
| CN112785008A (en) | Water heater fault processing method and water heater | |
| CN114019283A (en) | Capacitance fault detection method and device and range hood | |
| CN112462163A (en) | High-voltage interlocking loop fault detection method and device | |
| JP2016126645A (en) | Power supply device and program for storing logs | |
| JP2006177840A (en) | Earth fault detector and diagnosis method of earth fault detector | |
| CN106602498A (en) | Method and apparatus for setting low-voltage electric appliance rated parameters | |
| CN112924797B (en) | Fault positioning method and system for high-voltage frequency conversion system | |
| CN114325382B (en) | Method and system for detecting open-phase fault of three-phase alternating current motor and electric equipment | |
| CN213275930U (en) | Device for testing BMS high-voltage interlocking function | |
| JP6344302B2 (en) | Battery controller | |
| CN211318680U (en) | Motor stalling experiment monitoring system | |
| CN114167781A (en) | Early warning system and method for abnormal conditions of kitchen appliances | |
| CN110912463A (en) | Motor control method and device, storage medium and motor | |
| CN109191816B (en) | Electrical appliance fault detection method and device, storage medium and terminal | |
| CN108731186A (en) | Control method and device of air conditioner, storage medium and air conditioner | |
| CN111309568A (en) | Method and system for alarming aging of battery on server | |
| CN111764101A (en) | Balance ring liquid leakage detection method and device and washing machine |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |