CN114113848A - Ground wire detection device, washing machine and ground wire detection method thereof - Google Patents
Ground wire detection device, washing machine and ground wire detection method thereof Download PDFInfo
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Abstract
The invention discloses a ground wire detection device, a washing machine and a ground wire detection method thereof, wherein the device comprises: the detection unit is configured to detect whether the current ground wire of the main power supply ground wire, the shell ground wire and the motor ground wire is conducted or not and output a detection result; wherein, the detection result comprises: a first level signal or a second level signal; if the ground wire is conducted, the detection result is a first level signal; and if the ground wire is not conducted, the detection result is a second level signal. According to the scheme, the electrical equipment is allowed to be used under the condition that the safety of the ground wire of the electrical equipment is determined by detecting the ground wire of the electrical equipment, and the use safety of the electrical equipment is improved.
Description
Technical Field
The invention belongs to the technical field of electrical equipment such as a washing machine, and particularly relates to a ground wire detection device, a washing machine and a ground wire detection method thereof, in particular to a device for detecting the ground wire conduction of the washing machine, the washing machine with the device and the ground wire detection method of the washing machine.
Background
The electrical equipment such as a washing machine adopts a machine shell for grounding in order to solve the safety problem, but the problems of line fault or poor contact and the like can occur, and a user cannot know the problems and the electric shock risk can be brought; when a user uses electrical equipment such as a washing machine, the user can not avoid contacting with moisture, and the safety problem is further influenced.
The above is only for the purpose of assisting understanding of the technical aspects of the present invention, and does not represent an admission that the above is prior art.
Disclosure of Invention
The invention aims to provide a ground wire detection device, a washing machine and a ground wire detection method thereof, which are used for solving the problem that when the ground wire of electrical equipment has line faults or poor contact and the like, the use of the electrical equipment has safety risks, so that the effect that the electrical equipment is allowed to be used under the condition that the safety of the ground wire of the electrical equipment is determined by detecting the ground wire of the electrical equipment is achieved, and the use safety of the electrical equipment is improved.
The invention provides a ground wire detection device, wherein the ground wire is a ground wire of electrical equipment; the ground wire of the electrical equipment comprises: a main power supply ground wire, a shell ground wire and a motor ground wire; recording any one of the main power supply ground wire, the shell ground wire and the motor ground wire in the current detection process as a current ground wire; the ground wire detection device comprises: a detection unit; the detection unit is configured to detect whether a current ground wire of the main power supply ground wire, the chassis ground wire and the motor ground wire is conducted or not and output a detection result; wherein, the detection result comprises: a first level signal or a second level signal; if the ground wire is conducted, the detection result is a first level signal; and if the ground wire is not conducted, the detection result is a second level signal.
In some embodiments, in a case where detection is required for the main power supply ground, the chassis ground, and the motor ground, the number of the detection units is three; the three detection units are specifically a first detection unit, a second detection unit and a third detection unit; wherein the first detection unit is configured to detect whether the main power ground is on; the second detection unit is configured to detect whether the chassis ground is conductive; the third detection unit is configured to detect whether the motor ground is conductive.
In some embodiments, further comprising: a control unit; the control unit is configured to control the detection unit to start under the condition that the electrical equipment is started; and controlling the electrical equipment to operate under the condition that the current ground wire is conducted as the detection result; and initiating a reminding message that the current ground wire is not grounded when the detection result is that the current ground wire is not conducted, and controlling the electrical equipment to be powered off in a delayed manner when the electrical equipment is not powered off.
In some embodiments, the control unit comprises: a control module and a main controller of the electrical equipment; the ground wire detection device further comprises: a communication module; the detection result output by the detection unit can be input to the control module; the communication module is arranged between the control module and the main controller of the electrical equipment and is configured to realize communication between the control module and the main controller of the electrical equipment.
In some embodiments, the ground line detection apparatus further includes: a power supply module; the power supply module can supply power for the detection unit, the control module and the communication module.
In some embodiments, the power supply module includes: a voltage transformation module; the transformation module is arranged between an alternating current power supply and the control module and can carry out rectification and transformation based on the alternating current power supply to obtain a power supply; the power supply can supply power for the detection unit, the control module and the communication module.
In some embodiments, the detection unit comprises: the device comprises a voltage division module, an optocoupler module and an upward drawing module; the voltage division module comprises: the first voltage division module and the second voltage division module; the live wire of the alternating current power supply of the electrical equipment is connected to the anode of the diode side in the optical coupling module after passing through the first voltage division module; the current bus is connected to a cathode on the side of a diode in the optical coupling module; the second voltage division module is arranged between an anode at the side of a diode in the optical coupling module and a cathode at the side of the diode in the optical coupling module; a direct current power supply is connected to an emitter at the side of a transistor in the optical coupling module after passing through the pull-up module; an emitter at the transistor side in the optical coupling module is used as an output port of the detection unit and can output the detection result; and the collector electrode at the transistor side in the optical coupling module is grounded.
In some embodiments, the detection unit further comprises: a capacitive module; the capacitor module is arranged between an emitter at the transistor side in the optical coupling module and a collector at the transistor side in the optical coupling module.
In accordance with the above apparatus, a further aspect of the present invention provides a washing machine, comprising: the ground wire detection device described above.
In accordance with the above washing machine, a further aspect of the present invention provides a ground line detecting method of a washing machine, including: under the condition that the washing machine is started, controlling the detection unit to start; detecting whether the current ground wires of a main power supply ground wire, a shell ground wire and a motor ground wire of the washing machine are conducted or not through the detection unit, and outputting a detection result; wherein, the detection result comprises: a first level signal or a second level signal; if the ground wire is conducted, the detection result is a first level signal; if the ground wire is not conducted, the detection result is a second level signal; controlling the washing machine to operate under the condition that the current ground wire is conducted according to the detection result; and initiating a reminding message that the current ground wire is not grounded when the detection result is that the current ground wire is not conducted, and controlling the washing machine to be turned off in a delayed manner when the washing machine is not turned off.
In some embodiments, in the case that the number of the detection units is three, and the three detection units are specifically a first detection unit, a second detection unit and a third detection unit, controlling the detection units to start includes: controlling the first detection unit to start so as to detect whether the main power supply ground wire is conducted; under the condition that the ground wire of the main power supply is conducted, controlling the second detection unit to be started so as to detect whether the ground wire of the shell is conducted or not; under the condition that the ground wire of the shell is conducted, controlling the washing machine to start to execute a washing process, and controlling the third detection unit to start so as to detect whether the ground wire of the motor is conducted; controlling the washing machine to continuously execute a washing process under the condition that the ground wire of the motor is conducted
Therefore, according to the scheme of the invention, whether three important grounds of electrical equipment such as a washing machine are in a conducting state or not is detected by arranging the detection circuit, and the electrical equipment is timely reminded and protected under the condition that the corresponding ground wire is not conducted, and the electrical equipment such as the washing machine is allowed to normally run under the condition that the corresponding ground wire is conducted; therefore, the electrical equipment is allowed to be used under the condition that the safety of the ground wire of the electrical equipment is determined by detecting the ground wire of the electrical equipment, and the use safety of the electrical equipment 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 technical solution of the present invention is further described in detail by the accompanying drawings and embodiments.
Drawings
Fig. 1 is a schematic structural diagram of a ground line detection device according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of an embodiment of an apparatus for detecting ground conduction in a washing machine;
FIG. 3 is a schematic diagram of an embodiment of a detection circuit in an apparatus for detecting ground conduction in a washing machine;
FIG. 4 is a flowchart illustrating an exemplary embodiment of a method for controlling a device for detecting ground conduction in a washing machine;
fig. 5 is a schematic flowchart of a ground line detection method according to an embodiment of the present invention;
fig. 6 is a flowchart illustrating an embodiment of controlling the start of the detecting unit in the method of the present invention.
The reference numbers in the embodiments of the present invention are as follows, in combination with the accompanying drawings:
s1-a voltage transformation module; s2-a control module; s3-communication module; s4-detection circuit.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be clearly and completely described below with reference to the specific embodiments of the present invention and the accompanying drawings. It is to be understood that the described embodiments are merely exemplary of the invention, and not restrictive of the full scope of the 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.
Some solutions provide a filter circuit for a washing machine, which mainly performs filtering for suppressing electromagnetic interference of the washing machine, and cannot detect problems related to a ground line of the washing machine.
In the related scheme, there is no good method to detect whether the ground wire of the electrical equipment is safely conducted or not, and to make a corresponding instruction when the ground wire is conducted.
According to an embodiment of the present invention, there is provided a ground line detecting apparatus. Referring to fig. 1, a schematic diagram of an embodiment of the apparatus of the present invention is shown. The ground wire is the ground wire of the electrical equipment. The ground wire of the electrical equipment comprises: the main power supply ground wire, the shell ground wire and the motor ground wire. And recording any one of the main power supply ground wire, the shell ground wire and the motor ground wire in the current detection process as a current ground wire.
The ground wire detection device comprises: a detection unit. And a detection unit, such as a detection circuit S4.
The detection unit is arranged between a live wire of an alternating current power supply of the electrical equipment and a current ground wire of the main power supply ground wire, the shell ground wire and the motor ground wire, and is configured to detect whether the main power supply ground wire, the shell ground wire and the current ground wire of the motor ground wire are conducted or not and output a detection result.
Wherein, the detection result comprises: a first level signal or a second level signal. The first level signal is a low level signal, and the second level signal is a high level signal. And if the ground wire is conducted, the detection result is a first level signal. And if the ground wire is not conducted, the detection result is a second level signal.
The invention provides a device for detecting the conduction of a ground wire of a washing machine, which can detect whether a main power supply ground wire, a washing machine shell ground wire and a washing machine motor wire are in a conduction state or not through a detection device and a control method for detecting whether the ground wire is conducted or not according to the detection device. Specifically, the information detected by the detection circuit in the detection device can be processed to judge which ground wire is not conducted, the information is transmitted to the main controller to be displayed and reminded, and forced shutdown is performed when a user does not operate, so that the use safety of the electrical equipment can be improved.
In some embodiments, in a case where detection is required for the main power ground, the chassis ground, and the motor ground, the number of the detection units is three. The three detection units are specifically a first detection unit, a second detection unit and a third detection unit.
Wherein the first detection unit is configured to detect whether the main power ground is conductive.
The second detection unit is configured to detect whether the chassis ground is conductive.
The third detection unit is configured to detect whether the motor ground is conductive.
When the device for detecting the ground wire conduction of the washing machine is used, the device provided by the scheme of the invention is arranged near the inlet wire end of the main power wire of the washing machine, so that three lines, namely the main power ground wire, the shell ground wire of the washing machine and the motor ground wire, can be conveniently connected into the device for detecting the ground wire conduction of the washing machine. Fig. 2 is a schematic structural diagram of an embodiment of an apparatus for detecting ground conduction in a washing machine. The circuit typesetting and routing of the device for detecting the ground wire conduction of the washing machine provided by the scheme of the invention is approximately shown in figure 2.
In some embodiments, further comprising: a control unit. A control unit such as a main controller of the electric appliance, and a control module of the sensing device S2. And the control module S2 of the detection device is arranged between the main controller of the electrical equipment and the detection unit.
The control unit is configured to control the detection unit to start up when the electrical apparatus is turned on, specifically, when the control module S2 receives the turn-on information sent by the main controller of the electrical apparatus. And the number of the first and second groups,
the control unit is further configured to control the electrical equipment to operate when the detection result is that the current ground wire is conducted. And initiating a reminding message that the current ground wire is not grounded when the detection result is that the current ground wire is not conducted, and controlling the electrical equipment to be powered off in a delayed manner when the electrical equipment is not powered off. Specifically, the control unit is further configured to, in case that the control module S2 receives the detection result fed back after the detection unit is started, the control module S2 feeds back the detection result to the main controller of the electrical appliance, so as to: and the main controller of the electrical equipment controls the electrical equipment to operate under the condition that the current ground wire is conducted, initiates a reminding message that the current ground wire is not grounded under the condition that the current ground wire is not conducted, and controls the electrical equipment to be turned off in a delayed manner under the condition that the electrical equipment is not turned off.
In some embodiments, the control unit comprises: a control module and a main controller of the electrical equipment.
The ground wire detection device further comprises: a communication module, such as communication module S3.
The detection result output by the detection unit can be input to the control module. The communication module is arranged between the control module and the main controller of the electrical equipment and is configured to realize communication between the control module and the main controller of the electrical equipment.
In some embodiments, the ground line detection apparatus further includes: and a power supply module.
The power supply module can supply power for the detection unit, the control module and the communication module.
In some embodiments, the power supply module includes: a transformation module, such as transformation module S1.
The transformation module is arranged between an alternating current power supply and the control module and can perform rectification and transformation based on the alternating current power supply to obtain a power supply. The power supply can supply power for the detection unit, the control module and the communication module.
As shown in fig. 2, the apparatus for detecting ground conduction of a washing machine includes: the transformer module S1, the control module S2, the communication module S3 and the detection circuit S4. The neutral wire N and the live wire L output communication signals such as a transmission signal TX and a reception signal RX after passing through the transforming module S1, the control module S2 and the communication module S3. The detection circuit S4 detects whether the main power ground, the chassis ground, and the motor ground are on, and outputs the detection result to the control module S2. The zero line and live line (namely the zero line N and live line L) of the alternating current power supply provide power, and the power is rectified and transformed by the transformation module S1 to obtain stable low-voltage current +5V for the control module S2, the communication module S3 and the detection circuit S4.
In the example shown in FIG. 2, the control module S2 is primarily used for signal reception and processing, controlling the overall sensing process, and communicating with the communication module S3 (i.e., sending and receiving information). The communication module S3 is used for communication with the main controller (i.e., sending and receiving information), and passes the received information to the control module S2. The detection circuit S4 is mainly used to detect the conduction condition of three ground lines.
In some embodiments, the detection unit comprises: the device comprises a voltage division module, an optical coupling module and a pull-up module. The voltage division module comprises: the device comprises a first voltage division module and a second voltage division module. The first voltage dividing module is a resistor R1 and a resistor R2. And a second voltage divider module, such as resistor R3. And an optocoupler module, such as an optocoupler IC. Pull-up modules such as resistor R4.
And the live wire of the alternating current power supply of the electrical equipment is connected to the anode of the diode side in the optical coupling module after passing through the first voltage division module. The current bus is connected to a cathode of the diode side in the optical coupling module. The second voltage division module is arranged between an anode at the side of a diode in the optical coupling module and a cathode at the side of the diode in the optical coupling module.
And the direct current power supply is connected to an emitter at the side of the transistor in the optical coupling module after passing through the pull-up module. And an emitter at the transistor side in the optical coupling module is used as an output port of the detection unit and can output the detection result. And the collector electrode at the transistor side in the optical coupling module is grounded.
Fig. 3 is a schematic diagram of a detection circuit of an apparatus for detecting ground conduction in a washing machine according to an embodiment. When the ground wires (such as any one of the main power supply ground wire, the casing ground wire and the motor ground wire) are conducted, a high voltage exists between the live wire L and the ground wires (such as any one of the main power supply ground wire, the casing ground wire and the motor ground wire), voltage is reduced through the resistor R1, the resistor R2 and the resistor R3, the voltage is reduced to a suitable voltage value divided by the resistor R3, the optical coupler IC cannot be damaged, when sufficient voltage exists at two ends of the resistor R3, the diode side of the optical coupler IC is conducted, and then two pins at the transistor side of the optical coupler IC are also conducted.
Resistor R4 is a pull-up resistor. The +5V low-voltage current (i.e., +5V dc power supply) flows to the ground GND through the resistor R4 when the transistor side of the optocoupler IC is turned on, so that the output port can only obtain a low level (the chip reads a predetermined low level with respect to + 5V).
In some embodiments, the detection unit further comprises: and a capacitance module. The capacitor module is arranged between an emitter at the transistor side in the optical coupling module and a collector at the transistor side in the optical coupling module.
As shown in fig. 3, the detection circuit S4 includes: the circuit comprises a resistor R1, a resistor R2, a resistor R3, an optical coupler IC, a resistor R4 and a capacitor C1. The live line L passes through the resistor R1 and the resistor R2 and then connects to the anode of the diode side of the optocoupler IC. The ground wire (such as any one of the ground wire of the main power supply, the ground wire of the shell and the ground wire of the motor) is connected with the cathode of the diode side of the light coupling IC. And the resistor R3 is arranged between the anode of the diode side of the optical coupler IC and the cathode of the diode side of the optical coupler IC. The +5V DC power supply is connected to the transistor-side emitter of the optocoupler IC through a resistor R4. The collector on the transistor side of the optocoupler IC is grounded GND. And the capacitor C1 is arranged between the collector of the transistor side of the optical coupler IC and the emitter of the transistor side of the optical coupler IC. The transistor-side emitter of the optocoupler IC serves as an output port and can output the detection result of the detection circuit S4.
The capacitor C1 can play a role in protecting the optocoupler IC and also can play a role in filtering noise waves entering the output port. When the ground wire (such as any one of the ground wire of the main power supply, the ground wire of the casing and the ground wire of the motor) is not conducted, the two ends of the resistor R3 are not divided, the diode side of the optical coupling IC is not conducted, the transistor side of the optical coupling IC is not conducted, and the +5V direct-current power supply can only enter the output port through the pull-up resistor R4, so that high level can be obtained, and whether the optical coupling IC is conducted or not can be detected.
One detection circuit S4 is provided for each of the main power supply ground, the chassis ground, and the motor ground. For each of the casing ground and the motor ground, the total ground in the example shown in fig. 3 needs to be replaced with one of the washing machine casing ground and the motor ground for detecting whether the live wire L is conducted with one of the washing machine casing ground and the motor ground.
By adopting the technical scheme of the invention, whether three important grounding points of electrical equipment such as a washing machine are in a conducting state or not is detected by arranging the detection circuit, and the electrical equipment is reminded and protected in time under the condition that the corresponding ground wire is not conducted, and the electrical equipment such as the washing machine is allowed to normally run under the condition that the corresponding ground wire is conducted. Therefore, the electrical equipment is allowed to be used under the condition that the safety of the ground wire of the electrical equipment is determined by detecting the ground wire of the electrical equipment, and the use safety of the electrical equipment is improved.
According to an embodiment of the present invention, there is also provided a washing machine corresponding to the ground wire detecting device. The washing machine may include: the ground wire detection device described above.
Since the processes and functions of the washing machine of this embodiment are basically corresponding to the embodiments, principles and examples of the aforementioned apparatuses, reference may be made to the related descriptions in the aforementioned embodiments for details which are not described herein in the description of this embodiment.
By adopting the technical scheme of the invention, whether three important grounding points of electrical equipment such as a washing machine are in a conducting state or not is detected by arranging the detection circuit, and the electrical equipment is timely reminded and protected under the condition that the corresponding ground wire is not conducted, and the electrical equipment such as the washing machine is allowed to normally run under the condition that the corresponding ground wire is conducted, so that the use safety of a user is ensured.
According to an embodiment of the present invention, there is also provided a ground line detecting method of a washing machine corresponding to the washing machine, as shown in fig. 5, which is a schematic flow chart of an embodiment of the method of the present invention. The ground wire detection method of the washing machine may include: step S110 to step S140.
In step S110, in the case that the washing machine is turned on, specifically, in the case that the control module S2 receives the turn-on information sent by the main controller of the washing machine, the detection unit is controlled to be started.
In some embodiments, in the case that the number of the detection units is three, and three of the detection units are specifically a first detection unit, a second detection unit and a third detection unit, a specific process of starting the detection units is controlled in step S110, see the following exemplary description.
The following further describes a specific process of controlling the start of the detection unit in step S110 with reference to a schematic flow chart of an embodiment of controlling the start of the detection unit in the method of the present invention shown in fig. 6, including: step S210 to step S240.
Step S210, when the washing machine is turned on, controlling the first detection unit to start to detect whether the main power ground is connected.
Step S220, controlling the second detecting unit to start up to detect whether the chassis ground is connected or not when the main power ground is connected.
And step S230, controlling the washing machine to start a washing process and controlling the third detection unit to start to detect whether the ground of the motor is connected or not when the ground of the cabinet is connected.
And step S240, controlling the washing machine to continue to execute a washing process under the condition that the motor ground is conducted.
FIG. 4 is a flowchart illustrating an embodiment of a method for controlling an apparatus for detecting ground conduction in a washing machine. As shown in fig. 4, the method for controlling the apparatus for detecting the ground conduction of the washing machine includes:
step 1, after the user starts the washing machine, the washing machine main controller controls the detection device (namely, the device for detecting the ground wire conduction of the washing machine) to be started and sends the started information, and after the communication module S3 in the detection device receives the information, the communication module S2 sends the information to the control module S2.
In step 2, when the control module S2 receives the information sent by the communication module S3, the control module starts controlling the detection circuit S4 in the detection device to detect whether the ground line is on: if not, step 3 is executed. If so, go to step 4.
And 3, if the main ground wire is not conducted, the control module S2 sends information to the main controller through the communication module S3 after receiving the detection result, displays warning and prompts that the main ground wire is not grounded, the main controller detects whether the user is powered off, and if the user is not powered off, the main controller sets the power-off to be forced after one minute.
And 4, if the total ground wire is conducted, detecting whether the ground wire of the shell of the washing machine is conducted in a grounding mode: if not, step 5 is executed. Otherwise, step 6 is executed.
And 5, if the ground wire of the shell of the washing machine is not conducted, the control module S2 sends information to the main controller through the communication module S3 after receiving the detection result, displays warning and prompts that the ground wire of the shell of the washing machine is not grounded, the main controller detects whether the washing machine is powered off or not, and if the washing machine is not powered off, the washing machine is forced to be powered off after one minute.
And 6, if the grounding wire of the shell of the washing machine is conducted, starting a normal washing process, when the motor runs, sending information to a detection device by a main controller, and detecting whether the grounding wire of the motor is conducted or not by the detection device: and if the motor is not switched on, the main controller receives the information and displays a warning, so that safety risk exists, the motor is prompted that the ground wire is not grounded, whether the motor is powered off or not is detected, and if the motor is not powered off, forced power off is set to be carried out after one minute. If the washing is conducted, the normal washing process is continued, and the detection process is finished.
According to the scheme of the invention, whether three important grounding points of the washing machine are in a conducting state is detected through corresponding detection circuits, namely whether a main power supply ground wire, a washing machine shell ground wire and a washing machine motor wire of the washing machine are in a conducting state is detected, and through a corresponding control flow, when the corresponding ground wires are detected to be not conducted, the main controller can prompt that the corresponding ground wires are not conducted, and if a user does not process in time, shutdown operation can be carried out within a specified time. The power utilization safety standard of the washing machine is further guaranteed, the detection of a corresponding circuit is realized, and mandatory measures are adopted for protection, so that the use safety of a user is guaranteed.
At step S120, it is detected whether a current ground line among a main power ground line, a cabinet ground line, and a motor ground line of the washing machine is turned on through the detection unit, and a detection result is output. Wherein, the detection result comprises: a first level signal or a second level signal. The first level signal is a low level signal, and the second level signal is a high level signal. And if the ground wire is conducted, the detection result is a first level signal. And if the ground wire is not conducted, the detection result is a second level signal.
In step S130, in the case that the current ground is turned on as the detection result, the washing machine is controlled to operate.
In step S140, if the detection result is that the current ground line is not connected, a warning message that the current ground line is not grounded is initiated, and the washing machine is controlled to be turned off in a delayed manner if the washing machine is not turned off.
The invention provides a device for detecting the conduction of a ground wire of a washing machine, which can detect whether a main power supply ground wire, a washing machine shell ground wire and a washing machine motor wire are in a conduction state or not through a detection device and a control method for detecting whether the ground wire is conducted or not according to the detection device. Specifically, the information detected by the detection circuit in the detection device can be processed to judge which ground wire is not conducted, the information is transmitted to the main controller to be displayed for reminding, and forced shutdown is carried out when a user does not operate, so that the use safety of the washing machine can be improved.
Since the processes and functions implemented by the method of the present embodiment substantially correspond to the embodiments, principles and examples of the washing machine, reference may be made to the related descriptions in the foregoing embodiments without being detailed in the description of the present embodiment.
By adopting the technical scheme of the embodiment, whether three important grounding points of electrical equipment such as a washing machine are in a conducting state or not is detected by arranging the detection circuit, the electrical equipment is timely reminded and protected under the condition that the corresponding ground wire is not conducted, the electrical equipment such as the washing machine is allowed to normally run under the condition that the corresponding ground wire is conducted, and the use safety of the electrical equipment can be improved.
In summary, it is readily understood by those skilled in the art that the advantageous modes described above can be freely combined and superimposed without conflict.
The above description is only an example of the present invention, and is not intended to limit the present invention, and it is obvious to those skilled in the art that various modifications and variations can be made in the present invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the scope of the claims of the present invention.
Claims (11)
1. The ground wire detection device is characterized in that the ground wire is a ground wire of electrical equipment; the ground wire of the electrical equipment comprises: a main power supply ground wire, a shell ground wire and a motor ground wire; recording any one of the main power supply ground wire, the shell ground wire and the motor ground wire in the current detection process as a current ground wire;
the ground wire detection device comprises: a detection unit; wherein,
the detection unit is configured to detect whether a current ground wire of the main power supply ground wire, the chassis ground wire and the motor ground wire is conducted or not and output a detection result;
wherein, the detection result comprises: a first level signal or a second level signal; if the ground wire is conducted, the detection result is a first level signal; and if the ground wire is not conducted, the detection result is a second level signal.
2. The ground wire detecting device according to claim 1, wherein in a case where detection is required for the main power supply ground wire, the chassis ground wire, and the motor ground wire, the number of the detecting units is three; the three detection units are specifically a first detection unit, a second detection unit and a third detection unit; wherein,
the first detection unit is configured to detect whether the main power ground is conducted;
the second detection unit is configured to detect whether the chassis ground is conductive;
the third detection unit is configured to detect whether the motor ground is conductive.
3. The ground wire detecting device according to claim 1, further comprising: a control unit; the control unit is configured to control the detection unit to start under the condition that the electrical equipment is started; and the number of the first and second groups,
controlling the electrical equipment to operate under the condition that the detection result is that the current ground wire is conducted; and initiating a reminding message that the current ground wire is not grounded when the detection result is that the current ground wire is not conducted, and controlling the electrical equipment to be powered off in a delayed manner when the electrical equipment is not powered off.
4. The ground wire detecting device according to claim 3, wherein the control unit includes: a control module and a main controller of the electrical equipment;
the ground wire detection device further comprises: a communication module;
the detection result output by the detection unit can be input to the control module; the communication module is arranged between the control module and the main controller of the electrical equipment and is configured to realize communication between the control module and the main controller of the electrical equipment.
5. The ground wire detecting device according to claim 4, characterized by further comprising: a power supply module;
the power supply module can supply power for the detection unit, the control module and the communication module.
6. The ground wire detecting device according to claim 5, wherein the power supply module includes: a voltage transformation module;
the transformation module is arranged between an alternating current power supply and the control module and can carry out rectification and transformation based on the alternating current power supply to obtain a power supply; the power supply can supply power for the detection unit, the control module and the communication module.
7. The ground wire detection device according to any one of claims 1 to 6, characterized in that the detection unit comprises: the device comprises a voltage division module, an optocoupler module and an upward drawing module; the voltage division module comprises: the first voltage division module and the second voltage division module; wherein,
a live wire of an alternating current power supply of the electrical equipment is connected to an anode on the side of a diode in the optical coupling module after passing through the first voltage division module; the current bus is connected to a cathode on the side of a diode in the optical coupling module; the second voltage division module is arranged between an anode at the side of a diode in the optical coupling module and a cathode at the side of the diode in the optical coupling module;
a direct current power supply is connected to an emitter at the side of a transistor in the optical coupling module after passing through the pull-up module; an emitter at the transistor side in the optical coupling module is used as an output port of the detection unit and can output the detection result; and the collector electrode at the transistor side in the optical coupling module is grounded.
8. The ground wire detecting device according to claim 7, wherein the detecting unit further includes: a capacitive module; the capacitor module is arranged between an emitter at the transistor side in the optical coupling module and a collector at the transistor side in the optical coupling module.
9. A washing machine, characterized by comprising: the ground detection device according to any one of claims 1 to 8.
10. A ground line detecting method of a washing machine according to claim 9, comprising:
under the condition that the washing machine is started, controlling the detection unit to start;
detecting whether the current ground wires of a main power supply ground wire, a shell ground wire and a motor ground wire of the washing machine are conducted or not through the detection unit, and outputting a detection result; wherein, the detection result comprises: a first level signal or a second level signal; if the ground wire is conducted, the detection result is a first level signal; if the ground wire is not conducted, the detection result is a second level signal;
controlling the washing machine to operate under the condition that the current ground wire is conducted according to the detection result;
and initiating a reminding message that the current ground wire is not grounded when the detection result is that the current ground wire is not conducted, and controlling the washing machine to be turned off in a delayed manner when the washing machine is not turned off.
11. The ground wire detecting method of a washing machine as claimed in claim 10, wherein in case that the number of the detecting units is three, and the three detecting units are specifically a first detecting unit, a second detecting unit and a third detecting unit, controlling the detecting units to be activated comprises:
controlling the first detection unit to start so as to detect whether the main power supply ground wire is conducted;
under the condition that the ground wire of the main power supply is conducted, controlling the second detection unit to be started so as to detect whether the ground wire of the shell is conducted or not;
under the condition that the ground wire of the shell is conducted, controlling the washing machine to start to execute a washing process, and controlling the third detection unit to start so as to detect whether the ground wire of the motor is conducted;
and controlling the washing machine to continuously execute a washing process under the condition that the ground wire of the motor is conducted.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202111405954.7A CN114113848A (en) | 2021-11-24 | 2021-11-24 | Ground wire detection device, washing machine and ground wire detection method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202111405954.7A CN114113848A (en) | 2021-11-24 | 2021-11-24 | Ground wire detection device, washing machine and ground wire detection method thereof |
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| CN114113848A true CN114113848A (en) | 2022-03-01 |
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