Washing machine

Abstract

The embodiment of the invention provides a washing machine. The washing machine comprises a box body; the door body is arranged on the box body in an opening and closing mode, and an electric door lock is arranged on the door body; the electric door lock comprises a door hook and a door lock; when the door hook is inserted into the door lock, the door hook switch is switched on, and when the door hook is not inserted into the door lock, the door hook switch is switched off; the direct-current motor rotates when detecting the direct-current voltage and drives a gear in the door lock to rotate; a control circuit is arranged in the box body, and the control circuit comprises a detection module electrically connected with the door hook switch and used for detecting the state of the door hook switch; the driving module is electrically connected with the direct-current motor and used for driving the direct-current motor to rotate; and the controller is configured to control the driving module to drive the direct current motor to rotate when the detection module detects that the door hook switch is switched on, so that the electric door lock is switched to a door locking state or an unlocking state. According to the technical scheme, the door body can be fixed to the box body through the direct current motor, so that the safety is improved while noise is reduced.

Description

Technical Field

[0001] The present application relates to the field of electromechanical control technology, and in particular to a washing machine. Background Art

[0002] With the improvement of people's living standards, washing clothes with a washing machine is a common way of washing clothes. However, it is also difficult to prevent the door on the washing machine from opening abnormally during the washing process, causing the clothes to be thrown out of the washing machine. In the related art, a washing machine with an electromagnetic door lock is proposed, which generates magnetic force after energizing the two ends of the coil of the electromagnetic door lock, thereby attracting the lock head in the electromagnetic door lock to move, thereby locking or unlocking the door. However, due to its own characteristics, the electromagnetic door lock will generate a lot of noise when locked, which reduces the user experience, and the electromagnetic door lock requires high-voltage AC to work, which makes the user have a greater safety risk when accidentally touching the electric door lock. Summary of the invention

[0003] In order to solve the above technical problems, an embodiment of the present application provides a washing machine.

[0004] According to one aspect of an embodiment of the present application, a washing machine is provided, comprising: a housing; a door body that opens and closes on the housing, the door body being provided with an electric door lock; the electric door lock comprising: a door hook and a door lock; a door hook switch, the door hook switch being turned on when the door hook is inserted into the door lock, and being turned off when the door hook is not inserted into the door lock; a DC motor that rotates when a DC voltage is detected, driving a gear inside the door lock to rotate; a control circuit being provided in the housing, the control circuit comprising: a detection module that is electrically connected to the door hook switch and is used to detect a state of the door hook switch; a drive module that is electrically connected to the DC motor and is used to drive the DC motor to rotate; a controller that is configured to control the drive module to drive the DC motor to rotate when the detection module detects that the door hook switch is turned on, so that the electric door lock switches to a locked door state or an unlocked door state.

[0005] Optionally, the driving module includes a door lock power supply unit, an unlock power supply unit and a switching switch; the switching switch has a moving end, a first fixed end and a second fixed end, the moving end is electrically connected to the DC motor, the first fixed end is electrically connected to the door lock power supply unit, and the second fixed end is electrically connected to the unlock power supply unit; the controller is also configured to control the moving end of the switching switch to be connected to the first fixed end when the electric door lock is switched to the door lock state, so that the door lock power supply unit supplies power to the DC motor, and to control the moving end of the switching switch to be connected to the second fixed end when the electric door lock is switched to the unlock state, so that the unlock power supply unit supplies power to the DC motor.

[0006] Optionally, the door lock power supply unit includes a door lock power supply switch and a first DC power supply, one end of the door lock power supply switch is electrically connected to the first DC power supply, and the other end of the door lock power supply switch is electrically connected to the first fixed end; the unlocking power supply unit includes an unlocking power supply switch and a second DC power supply, one end of the unlocking power supply switch is electrically connected to the second DC power supply, and the other end of the unlocking power supply switch is electrically connected to the second fixed end; the controller is also configured to control the door lock power supply switch to be turned on when the electric door lock is switched to the door lock state, and to control the unlocking power supply switch to be turned on when the electric door lock is switched to the unlocking state.

[0007] Optionally, the driving module includes a safety switch, one end of which is electrically connected to the negative pole of the DC motor, and the other end of which is grounded; the controller is further configured to control the safety switch to conduct when the electric door lock is switched to the locked state or the unlocked state.

[0008] Optionally, the door lock power supply switch, the unlock power supply switch and the safety switch are all electrically connected to the door hook switch; when the door hook switch is disconnected, the door lock power supply switch, the unlock power supply switch and the safety switch are all disconnected.

[0009] Optionally, the control circuit also includes: a monitoring module, electrically connected to the DC motor, for monitoring the working state of the DC motor; the controller is also configured to control the DC motor to stop working when it is determined that the working state of the DC motor monitored by the monitoring module is abnormal.

[0010] Optionally, the working status includes the working current value of the DC motor, and the monitoring module includes a first monitoring circuit, which is electrically connected to the negative pole of the DC motor and is used to output the working current value of the DC motor when the DC motor rotates; the controller is also configured to determine that the working status of the DC motor is abnormal when the working current value output by the first monitoring circuit is greater than a preset threshold.

[0011] Optionally, the monitoring module also includes a second monitoring circuit, which is electrically connected to the negative pole of the DC motor and is used to output an abnormal level signal indicating that the working state of the DC motor is abnormal when the working current value of the DC motor is greater than the preset threshold value; the controller is also configured to determine that the working state of the DC motor is abnormal when receiving the abnormal level signal output by the second monitoring circuit.

[0012] Optionally, the controller is further configured to determine the working state of the DC motor based on the received working current value and the abnormal level signal, wherein the priority of the abnormal level signal is higher than the priority of the working current value.

[0013] Optionally, one end of the door hook switch is grounded; the detection module is electrically connected to the other end of the door hook switch, and is used to determine that the state of the door hook switch is on when a ground signal is detected, and determine that the state of the door hook switch is off when the ground signal is not detected.

[0014] In the technical solution of the embodiment of the present application, the controller controls the driving module to drive the DC motor to rotate, so that the electric door lock can be switched to the locked door state, so as to fix the door body of the washing machine on the box body to prevent clothes from being thrown out of the washing machine. At the same time, the door hook switch is used to ensure that the controller can control the electric door lock on the door body to switch to the locked door state or the unlocked door state only when the door body on the washing machine box body is in a closed state, so as to improve the safety of the door body of the washing machine when locking or unlocking the door; at the same time, the rotation of the DC motor drives the gear of the door lock to rotate to lock or unlock the door, which can effectively reduce the noise of the electric door lock, thereby improving the user's satisfaction; in addition, the DC power supply voltage of the DC motor is lower than the AC voltage of the washing machine. When the electric door lock leaks, the safety risk of the user accidentally touching the leaking electric door lock can be effectively reduced, thereby improving the safety of the user when using the washing machine. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The drawings herein are incorporated into the specification and constitute a part of the specification, showing embodiments consistent with the present application, and together with the specification, are used to explain the principles of the present application. Obviously, the drawings described below are only some embodiments of the present application, and for those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative work. In the drawings:

[0016] Figure 1 It is a schematic structural diagram of an electric door lock shown in an exemplary embodiment of the present application.

[0017] Figure 2 It is a structural schematic diagram of a control circuit shown in an exemplary embodiment of the present application.

[0018] Figure 3 It is a schematic diagram of the structure of a detection module in a control circuit shown in an exemplary embodiment of the present application.

[0019] Figure 4 It is a schematic diagram of the structure of a driving module in a control circuit shown in an exemplary embodiment of the present application.

[0020] Figure 5is Figure 4 A schematic diagram of the structure of another driving module is provided based on the above.

[0021] Figure 6 is Figure 5 A schematic diagram of the structure of another driving module is provided based on the above.

[0022] Figure 7 is Figure 6 A schematic diagram of the structure of another control circuit is provided based on the present invention.

[0023] Figure 8 is Figure 7 A structural schematic diagram of the monitoring module in the control circuit is provided based on the above.

[0024] Fig. 9 is Figure 8 A structural schematic diagram of another monitoring module is provided based on .

[0025] Fig.10 It is a flow chart of a method for controlling an electric door lock of a washing machine provided in an embodiment of the present application. DETAILED DESCRIPTION

[0026] Example embodiments will now be described more fully with reference to the accompanying drawings. However, example embodiments can be implemented in a variety of forms and should not be construed as limited to the examples set forth herein; rather, these embodiments are provided so that this application will be more comprehensive and complete and fully convey the concept of the example embodiments to those skilled in the art.

[0027] In addition, described feature, structure or characteristic can be combined in one or more embodiments in any suitable manner. In the following description, many specific details are provided to provide a full understanding of the embodiments of the present application. However, those skilled in the art will appreciate that the technical scheme of the present application can be put into practice without one or more of the specific details, or other methods, components, devices, steps, etc. can be adopted. In other cases, known methods, devices, realizations or operations are not shown or described in detail to avoid blurring the various aspects of the application.

[0028] The block diagrams shown in the accompanying drawings are merely functional entities and do not necessarily correspond to physically independent entities. That is, these functional entities may be implemented in software form, or in one or more hardware modules or integrated circuits, or in different networks and / or processor devices and / or microcontroller devices.

[0029] The flowcharts shown in the accompanying drawings are only exemplary and do not necessarily include all the contents and operations / steps, nor must they be executed in the order described. For example, some operations / steps can be decomposed, and some operations / steps can be combined or partially combined, so the actual execution order may change according to actual conditions.

[0030] It should be noted that the "multiple" mentioned in this article refers to two or more. "And / or" describes the association relationship of associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. The character " / " generally indicates that the previous and next associated objects are in an "or" relationship.

[0031] The present application provides a washing machine, which includes a housing and a door body that is opened and closed on the housing. The door body is provided with an electric door lock for fixing the door body on the housing. The structural diagram of the electric door lock can be referred to Figure 1 As shown, the electric door lock 100 includes a door hook switch 110, a door hook 120, a door lock 130 and a DC motor 140. Each part will be introduced one by one below.

[0032] The door hook switch 110 is provided in the electric door lock 100 , and the conduction control process of the door hook switch 110 is that the door hook switch 110 is turned on when the door hook 120 is inserted into the door lock 130 , and the door hook switch 110 is turned off when the door hook 120 is not inserted into the door lock 130 .

[0033] Based on the conduction control process of the door hook switch 110, the door hook 120 can be flexibly arranged according to actual needs. In one example, the door hook 120 can be slidably arranged in the door body, and a return spring is arranged on the door hook 120. One end of the return spring abuts against the door body, and the other end of the return spring abuts against the door hook 120. A resilient member is arranged corresponding to the moving end of the door hook switch 110. When the door body is closed toward the box body, the box body and the door hook 120 are abutted, forcing the return spring to deform, so that the door hook 120 and the moving end of the door hook switch 110 are abutted, further forcing the rebound member of the door hook switch 110 to deform, so that the moving end of the door hook switch 110 is electrically connected to the fixed end, thereby making the door hook switch 110 conductive, and when the door body is opened away from the box body, the door hook 120 and the moving end of the door hook switch 110 are reset under the rebound force of the return spring and the rebound member respectively, so that the door hook 120 and the moving end of the door hook switch 110 are separated and the moving end of the door hook switch 110 is separated from the fixed end, thereby disconnecting the door hook switch 110.

[0034] In another example, the door hook 120 can also be fixedly arranged on the box body, and correspondingly, an opening for inserting the door hook 120 is opened on the door body. When the door body approaches the box body to close the door, the door hook 120 is inserted into the opening, so that the door hook 120 and the moving end of the door hook switch 110 abut against each other, forcing the resilient member of the door hook switch 110 to deform, so that the moving end of the door hook switch 110 is electrically connected to the fixed end, thereby making the door hook switch 110 conductive, and when the door body moves away from the box body to open the door, the door hook 120 is synchronously away from the moving end of the door hook switch 110, so that the moving end of the door hook switch 110 is reset under the rebound force of the resilient member, so that the moving end of the door hook switch 110 is separated from the fixed end, and then the door hook switch 110 is disconnected.

[0035] In addition, the door hook switch can also be set as a sensor switch, that is, the sensor of the door hook switch automatically turns on when it senses that the door hook 120 is inserted into the door lock 130, and automatically turns off when it senses that the door hook 120 is not inserted into the door lock 130.

[0036] The door lock 130 and the DC motor 140 are both arranged in the door body. The DC motor 140 rotates when a DC voltage is detected, driving the gear inside the door lock 130 to rotate, so that the electric door lock 100 switches to a locked state or an unlocked state.

[0037] A control circuit 200 for controlling the electric door lock 100 to lock or unlock the door is provided in the box. Figure 2 As shown, the control circuit 200 includes a detection module 210, a driving module 220 and a controller 230, and each part will be introduced below.

[0038] The detection module 210 is electrically connected to the door hook switch 110 and is used to detect the state of the door hook switch 110 .

[0039] The driving module 220 is electrically connected to the DC motor 140 , and the driving module 220 is used to drive the DC motor 140 to rotate.

[0040] The controller 230 is electrically connected to the detection module 210 and the drive module 220 respectively. When the detection module 210 detects that the door hook switch 110 is turned on, the controller 230 is configured to control the drive module 220 to drive the DC motor 140 to rotate so that the electric door lock 100 switches to a locked state or an unlocked state.

[0041] In the implementation manner of the present application, the detection module 210 may adopt a switch detection circuit or a switch relay circuit.

[0042] The detection module 210 can be set flexibly according to actual needs. In one example, the detection module 210 can be set flexibly according to actual needs. Figure 3As shown, one end of the door hook switch 110 is grounded, and the detection module 210 is electrically connected to the other end of the door hook switch 110. When the door hook switch 110 is turned on, the detection module 210 is grounded through the door hook switch 110, so that the detection module 210 can be used to determine that the state of the door hook switch 110 is turned on when a grounding signal is detected, and determine that the state of the door hook switch 110 is turned off when no grounding signal is detected. That is, the switch detection circuit determines whether the state of the door hook switch 110 is turned on based on the grounding signal, or the switch relay circuit is set to turn on or off in response to the grounding signal, so as to determine whether the state of the door hook switch 110 is turned on through the switch relay circuit.

[0043] In another example, one end of the door hook switch 110 is electrically connected to the power supply, and the detection module 210 is electrically connected to the other end of the door hook switch 110. When the door hook switch 110 is turned on, the detection module 210 is connected to the power supply through the door hook switch 110, so that the detection module 210 can be used to determine that the state of the door hook switch 110 is turned on when a power signal is detected, and determine that the state of the door hook switch 110 is turned off when no power signal is detected, so as to improve the accuracy of the detection module 210 in determining the state of the door hook switch 110.

[0044] In an embodiment of the present application, when the door hook 120 abuts against the moving end of the door hook switch 110 so that the moving end of the door hook switch 110 is electrically connected to the fixed end, the door hook switch 110 is turned on, so that the detection module 210 can detect that the state of the door hook switch 110 is turned on. Correspondingly, after the detection module 210 detects that the door hook switch 110 is turned on, the controller 230 can control the drive module 220 to drive the DC motor 140 to rotate, that is, the DC motor 140 drives the gear to rotate synchronously to the position where the door lock 130 can fix the opening and closing end of the door body on the box body, or drives the gear to rotate synchronously to the position where the door lock 130 can detach the opening and closing end of the door body from the box body, so that the electric door lock 100 is switched to a locked state or an unlocked state.

[0045] Through the above-mentioned implementation, the controller 240 controls the driving module 220 to drive the DC motor to rotate, so that the electric door lock 100 can be switched to the door lock state, so as to fix the door body of the washing machine on the housing to prevent the clothes from being thrown out of the washing machine. At the same time, the door hook switch 110 ensures that the controller 230 can only control the electric door lock 100 on the door body to switch to the door lock state or unlock state when the door body on the washing machine housing is in a closed state, so as to improve the safety of the door body of the washing machine when locking or unlocking the door; at the same time, the rotation of the DC motor 140 drives the gear of the door lock 130 to rotate to lock or unlock the door, which can effectively reduce the noise of the electric door lock 100, thereby improving the user's satisfaction; in addition, the DC power supply voltage of the DC motor 140 is lower than the AC voltage of the washing machine. When the electric door lock 100 leaks electricity, the safety risk of the user accidentally touching the leakage electric door lock 100 can be effectively reduced, thereby improving the safety of the user when using the washing machine.

[0046] Figure 4 Schematic diagram of the structure of the driving module in the control circuit of the embodiment of the present application. Figure 4 As shown, the driving module 220 includes a door lock power supply unit 410, an unlock power supply unit 420 and a switch 430, and each part will be introduced one by one below:

[0047] The door lock power supply unit 410 and the unlock power supply unit 420 are both used to supply power to the DC motor 140. The door lock power supply unit 410 is used to switch the electric door lock 100 to the door lock state, and the unlock power supply unit 420 is used to switch the electric door lock 100 to the unlock state. The supply voltages corresponding to the door lock power supply unit 410 and the unlock power supply unit 420 can be set according to actual needs. The higher the DC voltage, the faster the corresponding rotation speed of the DC motor 140.

[0048] In the implementation of the present application, the power supply voltage of the door lock power supply unit 410 can be set to a first voltage, and the power supply voltage of the unlock power supply unit 420 can be set to a second voltage. The first voltage is the same as the rated voltage of the DC motor 140, and the second voltage is greater than the rated voltage of the DC motor 140, so that the door lock speed of the door lock 130 is ensured to switch the electric door lock 100 to the door lock state safely, and the unlocking speed of the door lock 130 is improved to ensure that the electric door lock 100 responds to unlocking in time.

[0049] The switch 430 has a moving end, a first fixed end and a second fixed end. The moving end is electrically connected to the DC motor 140 , the first fixed end is electrically connected to the door lock power supply unit 410 , and the second fixed end is electrically connected to the unlock power supply unit 420 .

[0050] The controller 230 is also electrically connected to the switching switch 430, and the controller 230 is also configured to control the moving end of the switching switch 430 to be connected to the first fixed end when the electric door lock 100 is switched to the door locking state, and to control the moving end of the switching switch 430 to be connected to the second fixed end when the electric door lock 100 is switched to the unlocking state.

[0051] In an embodiment of the present application, based on the electrical connection between the controller 230 and the switching switch 430, when the controller 230 needs to switch the electric door lock 100 to the door locked state, the moving end of the switching switch 430 can be controlled to be connected to the first fixed end, so that the door lock power supply unit 410 supplies power to the DC motor 140, thereby causing the DC motor 140 to rotate based on the power supply voltage provided by the door lock power supply unit 410, and drive the gears in the door lock 130 to rotate to the position corresponding to the door locked state, thereby allowing the electric door lock 100 to complete the process of switching to the door locked state.

[0052] When the controller 230 needs to switch the electric door lock 100 to the unlocked state, the moving end of the switching switch 430 can be controlled to be connected to the second fixed end, so that the unlocking power supply unit 420 supplies power to the DC motor 140, thereby causing the DC motor 140 to rotate based on the power supply voltage provided by the unlocking power supply unit 420, and driving the gears in the door lock 130 to rotate to the position corresponding to the unlocked state, thereby allowing the electric door lock 100 to complete the process of switching to the unlocked state.

[0053] Figure 5 is Figure 4 A schematic diagram of the structure of a driving module is provided based on FIG. Figure 5 As shown, the door lock power supply unit 410 in the driving module 220 includes a door lock power supply switch S1 and a first DC power supply V1, and the unlock power supply unit 420 includes an unlock power supply switch S2 and a second DC power supply V2. Each part will be described below:

[0054] One end of the door lock power supply switch S1 is electrically connected to the first DC power supply V1, and the other end of the door lock power supply switch S1 is connected to the first fixed end.

[0055] One end of the unlocking power switch S2 is electrically connected to the second DC power supply V2, and the other end of the unlocking power switch S2 is connected to the second fixed end.

[0056] The controller 230 is also electrically connected to the door lock power supply switch S1 and the unlock power supply switch S2 respectively. The controller 230 is configured to control the door lock power supply switch S1 to be turned on when the electric door lock 100 is switched to the door lock state, and to control the unlock power supply switch S2 to be turned on when the electric door lock 100 is switched to the unlock state.

[0057] Among them, the door lock power supply switch S1 and the unlock power supply switch S2 can be set to switch relays, thyristors, triodes or MOS tubes to control the conduction between the first DC power supply V1 and the switching switch 430. The specific setting method can be adjusted according to actual needs and is not limited here.

[0058] In an embodiment of the present application, based on the electrical connection between the controller 230 and the door lock power supply switch S1 and the unlock power supply switch S2, when the electric door lock 100 is switched to the door lock state, the controller 230 controls the moving end of the corresponding control switching switch 430 to be connected to the first fixed end, and controls the door lock power supply switch S1 to be turned on, so that the first DC power supply V1 can supply power to the DC motor 140 through the door lock power supply switch S1 and the switching switch 430; on the contrary, the door lock power supply switch S1 is controlled to be disconnected to prevent the first DC power supply V1 from continuously supplying power to the DC motor 140.

[0059] When the controller 230 needs to switch the electric door lock 100 to the unlocked state, it controls the movable end of the switching switch 430 to be connected to the second fixed end, and controls the unlocking power supply switch S2 to be turned on, so that the second DC power supply V2 can supply power to the DC motor 140 through the unlocking power supply switch S2 and the switching switch 430; on the contrary, it controls the door lock power supply switch S1 to be disconnected to prevent the second DC power supply V2 from continuously supplying power to the DC motor 140.

[0060] Through the above-mentioned implementation, when the controller 230 controls the electric door lock 100 to switch to the door lock state or the unlock state, in addition to controlling the power supply of the DC motor 140 by controlling the switching switch 430, the controller 230 can also further control the power supply of the DC motor 140 through the door lock power supply switch S1 and the unlock power supply switch S2 to improve the safety of the electric door lock 100; at the same time, when the controller 230 does not control the electric door lock 100 to switch to the door lock state or the unlock state, the controller 230 can control the power supply of the DC motor 140 to be completely disconnected through the door lock power supply switch S1 and the unlock power supply switch S2 to avoid abnormal operation of the DC motor 140, which may cause damage to the electric door lock 100.

[0061] Figure 6 is Figure 5 A schematic diagram of the structure of a driving module is provided based on FIG. Figure 6 As shown, the driving module 220 further includes a safety switch S3. One end of the safety switch S3 is electrically connected to the negative pole of the DC motor 140, and the other end of the safety switch S3 is grounded.

[0062] The controller 230 is also electrically connected to the safety switch S3 , and the controller 230 is also configured to control the safety switch S3 to be turned on when the electric door lock 100 is switched to a door locking state or an unlocking state.

[0063] Among them, the safety switch S3 is the same as the door lock power supply switch S1 and the unlock power supply switch S2, and can also be set as a switch relay, thyristor, triode or MOS tube to achieve the purpose of controlling the negative pole of the DC motor 140 to be grounded.

[0064] In an embodiment of the present application, the safety switch S3 is only turned on when the controller 230 switches the electric door lock 100 to a locked state or an unlocked state, that is, based on the electrical connection between the controller 230 and the safety switch S3, the controller 230 controls the safety switch S3 to be turned on whenever the electric door lock 100 needs to be switched to a locked state or an unlocked state, thereby reducing the probability of the DC motor 140 being accidentally energized and rotating, causing damage to the electric door lock 100.

[0065] In addition, in the embodiment of the present application, the door lock power switch S1, the unlock power switch S2 and the safety switch S3 are all electrically connected to the door hook switch 110. Based on the above connection relationship, when the door hook switch 110 is disconnected, the door lock power switch S1, the unlock power switch S2 and the safety switch S3 are all disconnected, that is, only when the door hook switch 110 is turned on, that is, after the door body is closed on the box body, the positive pole of the DC motor 140 can obtain the power supply of the first DC power supply V1 or the second DC power supply V2 through the door lock power switch S1 or the unlock power switch S2, and accordingly, the negative pole of the DC motor 140 can be grounded through the safety switch S3, so as to operate and rotate normally, further reducing the probability of the DC motor 140 being energized by mistake, and avoiding the DC motor 140 from being energized and rotating by mistake when the door body is not closed on the box body, causing the door body to be unable to be closed on the box body and the electric door lock 100 to be unable to complete the door locking normally.

[0066] Figure 7 is Figure 6 A schematic diagram of the structure of a control circuit is provided based on FIG. Figure 7 As shown, the control circuit 200 further includes a monitoring module 410 . The monitoring module 410 is electrically connected to the DC motor 140 , and is used to monitor the working state of the DC motor 140 .

[0067] The controller 230 is also electrically connected to the monitoring module 410 , and the controller 230 is also configured to control the DC motor 140 to stop working when the monitoring module 410 determines that the working state of the DC motor 140 monitored by the monitoring module 410 is abnormal.

[0068] In an embodiment of the present application, the working state of the DC motor 140 can be monitored by a monitoring module 410 electrically connected to the DC motor 140, and when the working state of the DC motor 140 monitored by the monitoring module 410 is determined to be abnormal, the controller 230 electrically connected to the monitoring module 410 controls the DC motor 140 to stop working, thereby reducing the probability of damage to the DC motor 140 and extending the service life of the DC motor 140.

[0069] Under the premise that the working state is the working current value of the DC motor 140, the present application Figure 7 Provided on the basis of Figure 8 A schematic diagram of the structure of a monitoring module 410 is shown. Figure 8 As shown, the monitoring module 410 includes a first monitoring circuit 510. The first monitoring circuit 510 is electrically connected to the negative pole of the DC motor 140, and is used to output the working current value of the DC motor 140 when the DC motor 140 rotates.

[0070] The controller 230 is electrically connected to the first monitoring circuit 510 , and the controller 230 is further configured to determine that the working state of the DC motor 140 is abnormal when receiving a working current value output by the first monitoring circuit 510 that is greater than a preset threshold.

[0071] The first monitoring circuit 510 may be an operational amplifier circuit or a comparator circuit.

[0072] In the embodiment of the present application, the first monitoring circuit 510 can obtain the working current value of the DC motor 140 when the DC motor 140 is powered and rotated by being electrically connected to the negative pole of the DC motor 140, so as to output the working current value. Correspondingly, the controller 230 can receive the working current value output by the first monitoring circuit 510 by being electrically connected to the first monitoring circuit 510, and further compare the working current value with a preset threshold value. If it is determined that the working current value is greater than the preset threshold value, it indicates that the current working current value of the DC motor 140 is above the maximum operating current of the DC motor 140, causing the DC motor 140 to be very prone to failure. Therefore, it can be determined that the working state of the DC motor 140 is abnormal, thereby controlling the DC motor 140 to stop working, and ensuring that the DC motor 140 is not easily damaged.

[0073] In addition, the first monitoring circuit 510 can also be used to output a preset fixed current value when the DC motor 140 is not rotating, that is, when the operating current value of the DC motor 140 is too low, so that the controller 230 can determine that the DC motor 140 is not rotating based on the received preset fixed current value.

[0074] Fig. 9 is Figure 8A structural diagram of a monitoring module is provided based on the Fig. 9 As shown, the monitoring module 410 further includes a second monitoring circuit 610. The second monitoring circuit 610 is electrically connected to the negative pole of the DC motor 140, and is used to output an abnormal level signal indicating that the working state of the DC motor 140 is abnormal when the working current value of the DC motor 140 is greater than a preset threshold.

[0075] The controller 230 is also electrically connected to the second monitoring circuit 610 , and the controller 230 is further configured to determine that the working state of the DC motor 140 is abnormal when receiving an abnormal level signal output by the second monitoring circuit 610 .

[0076] The second monitoring circuit 610 may be a comparator circuit.

[0077] In an embodiment of the present application, the second monitoring circuit 610 can obtain the operating current value of the DC motor 140 when the DC motor 140 is powered and rotated by being electrically connected to the negative pole of the DC motor 140, so as to further compare the operating current value with a preset threshold value, thereby outputting an abnormal level signal indicating that the operating state of the DC motor 140 is abnormal when the operating current value of the DC motor 140 is greater than the preset threshold value.

[0078] Among them, the abnormal level signal can be set to a high level signal, that is, the second monitoring circuit 610 outputs a high level signal when the working current value of the DC motor 140 is greater than the preset threshold, so that the high level signal is output to the controller 230 as an abnormal level signal. Correspondingly, the second monitoring circuit 610 outputs a low level signal when the working current value of the DC motor 140 is lower than the preset threshold, so that the controller 230 determines that the DC motor 140 is in a normal operating state based on the received low level signal. In addition, the abnormal level signal can also be set to a low level signal as needed, and the corresponding second monitoring circuit 610 outputs a low level signal when the working current value of the DC motor 140 is greater than the preset threshold, which is not limited here.

[0079] The controller 230 is electrically connected to the second monitoring circuit 610 , and when receiving the abnormal level signal output by the second monitoring circuit 610 , it can determine that the working state of the DC motor 140 is abnormal, so as to control the DC motor 140 to stop working.

[0080] In addition, in the embodiment of the present application, the controller 230 can also be configured to determine the working state of the DC motor 140 according to the received working current value and the abnormal level signal to improve the accuracy of the determined working state of the DC motor 140. Among them, the priority of the abnormal level signal is higher than the priority of the working current value, so that when the controller 230 receives the abnormal level signal, it controls the DC motor 140 to stop working without further determining whether the working voltage value output by the first monitoring circuit 510 is greater than the preset threshold value, thereby improving the speed of controlling the DC motor 140 in the abnormal working state to stop working, and further avoiding damage to the DC motor 140.

[0081] Fig.10 The present invention provides a method for controlling an electric door lock of a washing machine. Figure 1-Figure 9 The electric door lock control method of the washing machine includes the following steps S1001 to S1013:

[0082] Step S1001, obtaining a door closing signal output by a detection module to indicate that a door hook switch is turned on.

[0083] Among them, the detection module can use the grounding signal as a door closing signal, that is, when the door hook switch is turned on, the detection module is grounded through the electrical connection between the door hook switch to obtain the grounding signal for output.

[0084] Step S1002: If a door closing signal output by the detection module is obtained, the control information carried by the control program is identified.

[0085] Step S1002 includes step S1003 and step S1004.

[0086] Step S1003 is to identify that the control information carried by the control program is to switch the electric door lock to the door lock state, control the moving end of the switching switch to be connected to the first fixed end, and control the door lock power supply switch and the safety switch to be turned on.

[0087] Step S1004 is to identify that when the control information carried by the control program is to switch the electric door lock to the unlocked state, control the movable end of the switching switch to be connected to the second fixed end, and control the unlocking power supply switch and the safety switch to be turned on.

[0088] Steps S1005 to S1013 are provided after step S1003 and step S1004.

[0089] Step S1005, receiving the operating current value output by the first detection circuit.

[0090] Step S1006, determining whether the received operating current value is higher than a preset threshold.

[0091] Step S1006 includes step S1007 and step S1008. In step S1006, if the judgment is yes, it indicates that the DC motor is operating abnormally, and step S1007 is executed to control the DC motor to stop working. If the judgment is no, it indicates that the motor is operating normally, and step S1008 is executed to control the power-on timer to count the power-on time of the DC motor.

[0092] Step S1009, controlling the rotation timer to time the rotation duration of the DC motor.

[0093] Step S1010, receiving a level signal output by a second detection circuit.

[0094] Step S1011, determining whether the received level signal is an abnormal level signal.

[0095] Step S1011 includes step S1012. In step S1011, if the answer is yes, it indicates that the DC motor is operating abnormally, and step S1012 is executed to control the DC motor to stop working.

[0096] In addition, in step S1007 and step S1012, after controlling the DC motor to stop working, a fault code indicating that the working state of the DC motor is abnormal can also be sent to the display module of the washing machine for display, so that the user can check and determine the fault, thereby improving the user's satisfaction.

[0097] If it is determined that the timing duration of the power-on timer in step S1008 reaches the preset power-on duration, if it is determined that the timing duration of the rotation timer in step S1009 reaches the preset rotation duration, and if it is determined that the level signal in step S1011 is not an abnormal level signal, then jump to step S1013 to control the DC motor to stop, determine that the control signal has been executed, and generate an execution end mark, that is, the electric door lock has switched to the locked state or has switched to the unlocked state.

[0098] Those skilled in the art will readily appreciate other embodiments of the present application after considering the specification and practicing the embodiments disclosed herein. The present application is intended to cover any variations, uses or adaptations of the present application, which follow the general principles of the present application and include common knowledge or customary technical means in the art that are not disclosed in the present application.

[0099] It should be understood that the present application is not limited to the precise structures that have been described above and shown in the drawings, and that various modifications and changes may be made without departing from the scope thereof. The scope of the present application is limited only by the appended claims.

Claims

1. A washing machine, characterized in that: include: Box; A door body is opened and closed on the box body, and an electric door lock is provided on the door body; The electric door lock comprises: Door hooks and locks; A door hook switch, which is turned on when the door hook is inserted into the door lock, and is turned off when the door hook is not inserted into the door lock; A DC motor rotates when a DC voltage is detected, driving the gear inside the door lock to rotate; The box is provided with a control circuit, and the control circuit comprises: A detection module, electrically connected to the door hook switch, for detecting a state of the door hook switch; A driving module, electrically connected to the DC motor, and used to drive the DC motor to rotate; The controller is configured to control the driving module to drive the DC motor to rotate when the detection module detects that the door hook switch is turned on, so that the electric door lock switches to a locked state or an unlocked state.

2. The washing machine according to claim 1, characterized in that: The driving module includes a door locking power supply unit, an unlocking power supply unit and a switching switch; The switch has a moving end, a first fixed end, and a second fixed end, the moving end is electrically connected to the DC motor, the first fixed end is electrically connected to the door lock power supply unit, and the second fixed end is electrically connected to the unlock power supply unit; The controller is also configured to control the moving end of the switching switch to be connected to the first fixed end when the electric door lock is switched to the door locking state, so that the door locking power supply unit supplies power to the DC motor, and to control the moving end of the switching switch to be connected to the second fixed end when the electric door lock is switched to the door unlocking state, so that the door unlocking power supply unit supplies power to the DC motor.

3. The washing machine according to claim 2, characterized in that: The door lock power supply unit includes a door lock power supply switch and a first DC power supply, one end of the door lock power supply switch is electrically connected to the first DC power supply, and the other end of the door lock power supply switch is electrically connected to the first fixed end; The unlocking power supply unit comprises an unlocking power supply switch and a second DC power supply, one end of the unlocking power supply switch is electrically connected to the second DC power supply, and the other end of the unlocking power supply switch is electrically connected to the second fixed end; The controller is further configured to control the door lock power supply switch to be turned on when the electric door lock is switched to the door lock state, and to control the unlock power supply switch to be turned on when the electric door lock is switched to the unlock state.

4. The washing machine according to claim 3, characterized in that: The driving module comprises a safety switch, one end of which is electrically connected to the negative pole of the DC motor, and the other end of which is grounded; The controller is further configured to control the safety switch to be turned on when the electric door lock is switched to the door locking state or the door unlocking state.

5. The washing machine according to claim 4, characterized in that: The door lock power supply switch, the unlock power supply switch and the safety switch are all electrically connected to the door hook switch; When the door hook switch is turned off, the door lock power supply switch, the unlock power supply switch and the safety switch are all turned off.

6. The washing machine according to claim 1, characterized in that: The control circuit further comprises: A monitoring module, electrically connected to the DC motor, and used to monitor the working state of the DC motor; The controller is also configured to control the DC motor to stop working when it is determined that the working state of the DC motor monitored by the monitoring module is abnormal.

7. The washing machine according to claim 6, characterized in that: The working state includes the working current value of the DC motor, and the monitoring module includes a first monitoring circuit, which is electrically connected to the negative pole of the DC motor and is used to output the working current value of the DC motor when the DC motor rotates; The controller is also configured to determine that the operating state of the DC motor is abnormal when the operating current value output by the first monitoring circuit is greater than a preset threshold.

8. The washing machine according to claim 6, characterized in that: The monitoring module also includes a second monitoring circuit, which is electrically connected to the negative pole of the DC motor and is used to output an abnormal level signal indicating that the working state of the DC motor is abnormal when the working current value of the DC motor is greater than the preset threshold value; the controller is also configured to determine that the working state of the DC motor is abnormal when receiving the abnormal level signal output by the second monitoring circuit.

9. The washing machine according to claim 8, characterized in that: The controller is also configured to determine the working state of the DC motor according to the received working current value and the abnormal level signal, wherein the priority of the abnormal level signal is higher than the priority of the working current value.

10. The washing machine according to claim 1, characterized in that: One end of the door hook switch is grounded; the detection module is electrically connected to the other end of the door hook switch, and is used to determine that the state of the door hook switch is on when a ground signal is detected, and determine that the state of the door hook switch is off when the ground signal is not detected.

Images