Clothes washing and protecting equipment

Abstract

The embodiment of the invention provides clothes washing and caring equipment, which comprises a box body, and the box body comprises an inner cylinder used for placing clothes to be washed and caring and a motor used for driving the inner cylinder to rotate; the power electronic switch is used for controlling on-off between the motor and a power supply of the clothes washing and caring equipment; the controller is electrically connected with the power electronic switch, and the controller is further configured to execute the following steps that a washing and care program currently operated by the clothes washing and care equipment is obtained; a target starting voltage waveform corresponding to the motor is determined according to the washing and protecting program, and the current value corresponding to the target starting voltage waveform is lower than the current value output by the power source; and on-off of the power electronic switch is controlled based on the target starting voltage waveform, so that the motor obtains a voltage waveform the same as the target starting voltage waveform from the power supply through the power electronic switch. According to the technical scheme of the embodiment of the invention, the impact of the instantaneous current on the control loop of the motor when the motor is started can be reduced.

Description

Technical Field

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

[0002] With the improvement of people's living standards, using clothing washing and care equipment to wash and care clothes has become a common way of washing and care for people. In related art, clothing washing and care equipment is usually provided with a box body, and an inner drum for placing the clothes to be washed is provided in the box body. The inner drum is driven by a motor provided in the box body to rotate, thereby assisting the clothing washing and care equipment in completing the washing and care process of the clothes to be washed.

[0003] However, motors are typically started by directly applying AC voltage to the motor. This direct application of AC voltage causes the voltage across the motor to quickly reach the rated voltage, resulting in a current surge of two to three times that of normal operation. This surge in current can then impact the motor's control circuitry, inevitably causing a current surge in the motor's external control circuitry, shortening the motor's service life. Summary of the Invention

[0004] In order to solve the above technical problems, the embodiments of the present application provide a clothing washing and care device and a method for controlling a motor in the clothing washing and care device.

[0005] According to one aspect of an embodiment of the present application, a clothing washing and care device is provided, comprising: a housing, the housing comprising an inner drum for placing clothing to be washed and a motor for driving the inner drum to rotate; a power electronic switch for controlling the on-off connection between the motor and a power supply of the clothing washing and care device; a controller, the controller being electrically connected to the power electronic switch, the controller being further configured to perform the following steps: obtaining a washing and care program currently running on the clothing washing and care device; determining a target starting voltage waveform corresponding to the motor according to the washing and care program, wherein a starting current value obtained by the motor under the target starting voltage waveform is lower than a current value output by the power supply; and controlling the on-off connection of the power electronic switch based on the target starting voltage waveform, so that the motor obtains a voltage waveform identical to the target starting voltage waveform from the power supply through the power electronic switch.

[0006] In the above embodiment, the washing program currently running in the clothing washing and care equipment is obtained, and then the target starting voltage waveform corresponding to the motor is determined according to the washing and care program, that is, the starting voltage waveform is determined so that the instantaneous value of the current obtained from the power supply when the motor is started under the current washing and care program will not overshoot, and then the on and off of the power electronic switch is controlled based on the target starting voltage waveform, so that the motor obtains a voltage waveform identical to the target starting voltage waveform from the power supply through the power electronic switch, thereby reducing the current impact on the control circuit of the motor, and thus achieving the purpose of extending the service life of the motor.

[0007] In one embodiment of the present application, based on the aforementioned scheme, the controller is further configured to perform the following steps: in the process of determining the target starting voltage waveform corresponding to the motor according to the washing program, monitoring the washing time of the clothing washing equipment in real time; determining the washing stage in which the washing time is located in the washing program; and determining the target starting voltage waveform corresponding to the motor according to the washing stage.

[0008] In the above embodiment, the instantaneous current drawn from the power supply during motor startup in each wash phase of the current wash program is ensured to not overshoot. Furthermore, by setting a corresponding starting voltage waveform for the motor in each wash phase, the difference between the motor's starting voltage waveform and the motor's actual operating conditions in the current wash phase is reduced, thereby ensuring that the motor's startup time in each wash phase is minimized.

[0009] In one embodiment of the present application, based on the aforementioned scheme, the clothing washing and care device also includes a load sensor, which is used to obtain the weight value of the clothing to be washed and care in the inner drum; the controller is electrically connected to the load sensor, and the controller is also configured to perform the following steps: in the process of determining the target starting voltage waveform corresponding to the motor according to the washing and care program, obtain the weight value collected by the load sensor; determine the optimized starting voltage waveform corresponding to the motor according to the weight value; and adjust the target starting voltage waveform based on the optimized starting voltage waveform.

[0010] In the above embodiment, it is further ensured that the instantaneous value of the current drawn by the motor from the power supply does not overshoot. In addition, when the driving force required by the motor to rotate the inner drum in the current washing program is reduced, it is possible to prevent excessive energy from being wasted during the motor startup process.

[0011] In one embodiment of the present application, based on the aforementioned scheme, the controller is further configured to perform the following steps: respectively obtain the current values ​​corresponding to the optimized starting voltage waveform and the target starting voltage waveform; if the current value of the optimized starting voltage waveform is lower than the current value corresponding to the target starting voltage waveform, then use the optimized starting voltage waveform as the target starting voltage waveform.

[0012] In one embodiment of the present application, based on the aforementioned scheme, the controller is further configured to perform the following steps: determine the operating voltage waveform corresponding to the motor according to the washing and care program; calculate the waveform interval corresponding to the target starting voltage waveform based on the operating voltage waveform; determine the position of the target power-on cycle in the waveform interval; generate the target starting voltage waveform according to the waveform interval and the position of the target power-on cycle.

[0013] In the above embodiment, the target starting voltage waveform corresponding to the motor under the current washing and care program is determined by the actual operating conditions of the motor under the current washing and care program, so as to increase the probability of overshoot when the driving device obtains current from the power supply for starting.

[0014] In one embodiment of the present application, based on the aforementioned scheme, the controller is further configured to perform the following steps: in determining the operating voltage waveform corresponding to the motor according to the washing and care program, obtaining the operating parameters of the motor in the washing and care program; and determining the operating voltage waveform corresponding to the motor based on the operating parameters.

[0015] In one embodiment of the present application, based on the above solution, the controller is further configured to perform the following steps: in the process of determining the position of the target power-on period in the waveform interval, calculating the position of the target power-on period in the waveform interval according to the following formula, including:

[0016] Su=1+(2M-1)(Nu-1);

[0017] Among them, Su is the position of the u-th target power-on cycle in the waveform interval, M is the preset voltage waveform order, Nu is the preset number of power-on cycles; and 1≤Nu≤C, C is the number of cycles in the waveform interval.

[0018] In one embodiment of the present application, based on the aforementioned scheme, the controller is further configured to perform the following steps: in the process of generating the target starting voltage waveform according to the waveform interval and the position of the target power-on cycle, obtaining the preset starting voltage corresponding to the motor in the washing and care program; determining the power-on start point and the power-on end point in the target power-on cycle according to the preset starting voltage; and generating the target starting voltage waveform based on the power-on start point and the power-on end point.

[0019] In one embodiment of the present application, based on the above-mentioned solution, the target power-on cycle includes multiple power-on start points and multiple power-on end points.

[0020] In the above embodiment, while ensuring that the current obtained by the motor from the power supply based on the target starting voltage waveform does not overshoot, the frequency of the current obtained by the motor from the power supply is increased, thereby improving the driving stability of the motor.

[0021] In one embodiment of the present application, based on the aforementioned scheme, the clothing washing and care device also includes a voltage monitoring module, which is used to monitor the voltage waveform output by the power supply in real time; the controller is electrically connected to the voltage monitoring module, and the controller is also configured to perform the following steps: in the process of controlling the on and off of the power electronic switch based on the target starting voltage waveform, the voltage waveform monitored by the voltage monitoring module is obtained in real time; when the voltage waveform reaches the power-on starting point corresponding to the target starting voltage waveform, the power electronic switch is controlled to be turned on; when the voltage waveform reaches the power-on cut-off point corresponding to the target starting voltage waveform, the power electronic switch is controlled to be turned off.

[0022] It should be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The accompanying drawings are incorporated into and constitute a part of the specification, illustrating embodiments consistent with the present application and, together with the specification, serving to explain the principles of the present application. It is obvious that the drawings described below are merely some embodiments of the present application, and a person of ordinary skill in the art can derive other drawings based on these drawings without inventive effort. In the drawings:

[0024] Figure 1 It is a structural schematic diagram of a clothing washing and care device shown as an exemplary embodiment of the present application.

[0025] Figure 2 It is a structural schematic diagram of a clothing washing and care device shown in another exemplary embodiment of the present application.

[0026] Figure 3 FIG. 4 is a schematic diagram of a target startup voltage waveform shown in an exemplary embodiment of the present application.

[0027] Figure 4 FIG. 4 is a schematic diagram of a target startup voltage waveform shown in another exemplary embodiment of the present application.

[0028] Figure 5FIG. 4 is a schematic diagram of a target startup voltage waveform shown in another exemplary embodiment of the present application.

[0029] Figure 6 It is a structural schematic diagram of a clothing washing and care device shown in another exemplary embodiment of the present application.

[0030] Figure 7 This is a flow chart of a method for controlling a motor in a clothing washing and care device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0031] Example embodiments will now be described more fully with reference to the accompanying drawings. However, example embodiments can be implemented in many 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 thorough and complete and will fully convey the concepts of the example embodiments to those skilled in the art.

[0032] 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 so as to provide a full understanding of the embodiments of the present application. However, it will be appreciated by those skilled in the art 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, implementations or operations are not shown or described in detail to avoid blurring the various aspects of the application.

[0033] The block diagrams shown in the accompanying drawings are merely functional entities and do not necessarily correspond to physically separate entities. That is, these functional entities may be implemented in software, in one or more hardware modules or integrated circuits, or in different networks and / or processor devices and / or microcontroller devices.

[0034] The flowcharts shown in the accompanying drawings are for illustrative purposes only and do not necessarily include all contents and operations / steps, nor must they be executed in the order described. For example, some operations / steps may be decomposed, while others may be combined or partially combined. Therefore, the actual execution order may vary depending on the actual situation.

[0035] It should be noted that the term "plurality" used in this document refers to two or more. "And / or" describes the relationship between associated objects, indicating that three possible relationships exist. For example, "A and / or B" can represent: A alone, A and B together, or B alone. The character " / " generally indicates that the associated objects are in an "or" relationship.

[0036] With the improvement of people's living standards, using clothing washing and care equipment to wash and care clothes has become a common way of washing and care for people. In related technologies, clothing washing and care equipment is usually provided with a box body, and an inner drum for placing the clothes to be washed is provided in the box body. The inner drum is driven by a motor provided in the box body to rotate, thereby assisting the clothing washing and care equipment to complete the washing and care process of the clothes to be washed.

[0037] However, motors are typically started by directly applying AC voltage to the motor. This direct application of AC voltage causes the voltage across the motor to quickly reach the rated voltage, resulting in a current surge of two to three times that of normal operation. This surge in current can then impact the motor's control circuitry, inevitably causing a current surge in the motor's external control circuitry, shortening the motor's service life.

[0038] In order to solve the above technical problems, the present application proposes a clothing washing and care device to improve the service life of the motor in the clothing washing and care device. Figure 1 It is a structural schematic diagram of a clothing washing and care device provided by an exemplary embodiment of the present application.

[0039] like Figure 1 As shown, the laundry washing and care device 10 may include a housing 11, which is the external structure of the laundry washing and care device and is used to secure and protect the components installed inside the laundry washing and care device. The housing 11 is usually made of metal or plastic. The housing 11 is usually also provided with a door for placing and removing laundry to be washed, and the door is usually equipped with a sealing ring to prevent water leakage. The housing 11 is also usually provided with a display screen and a control panel. The control panel has buttons, knobs, or a touch screen to facilitate user adjustment and control of the laundry washing and care process of the laundry washing and care device.

[0040] The clothes washing and care device 10 may include an inner drum 12, which is rotatably arranged in the box body 11 and is used for placing clothes to be washed.

[0041] The clothing washing and care device 10 may include a motor 13, which is arranged in the box 11, and the power end of the motor 13 is connected to the inner drum 12. The motor 13 is used to drive the inner drum 12 to rotate, so that the power end drives the inner drum 12 to rotate during the operation of the motor 13, thereby achieving the purpose of assisting the clothing washing and care device to wash and care for the clothes to be washed.

[0042] The laundry care device 10 may include a power electronic switch 14, which is disposed within the housing 11 and electrically connected to the motor 13 and the power supply of the laundry care device, respectively. The power electronic switch 14 is used to control the on / off connection between the motor 13 and the power supply 15 of the laundry care device 10. In the embodiment of the present application, the power electronic switch 14 is a switch-type electronic device that transmits the voltage output by the power supply to the motor 13 by opening or short-circuiting, thereby achieving the purpose of controlling the voltage input to the motor 13.

[0043] In the embodiment of the present application, the power electronic switch 14 includes: a power diode, a thyristor, an IGBT (Insulated Gate Bipolar Transistor), a GTR (Giant Transistor), a GTO (Gate-Turn-Off Thyristor), a Power MOSFET (Power Metal-Oxide-Semiconductor Field-Effect Transistor), etc. The power electronic switch 14 can be selected according to actual conditions and is not limited here.

[0044] The laundry care device 10 may include a controller 16 electrically connected to the power electronic switch 14 to control the voltage obtained by the motor drive device 13 from the power supply 15. The controller is configured to perform the following steps:

[0045] Get the washing program currently running on the clothing washing equipment;

[0046] Determine the target starting voltage waveform corresponding to the motor according to the cleaning and maintenance program;

[0047] The on and off of the power electronic switch is controlled based on the target starting voltage waveform.

[0048] Considering that there are many types of clothes to be washed by the clothing washing and care equipment, and in order to improve the washing and care effects of different types of clothes to be washed, the clothing washing and care equipment usually sets a variety of washing and care programs, so that the clothing washing and care equipment or the user can select the washing and care program with the best washing and care effect from the multiple washing and care programs for the current clothes to be washed and care. Accordingly, since the washing and care effect output by the clothing washing and care equipment is related to the operation of the motor, based on this, in order to achieve different washing and care effects in different washing and care programs, the corresponding operating conditions of the motor in different washing and care programs may also be different. Therefore, in an embodiment of the present application, the controller can first obtain the washing and care program currently running on the clothing washing and care equipment in order to determine the actual operating conditions of the motor.

[0049] Among them, the method of obtaining the washing program currently running in the clothing washing and care device can be flexibly set as needed. In one example, in response to the operation signal of the clothing washing and care device, the washing program corresponding to the operation signal can be obtained, so that the obtained washing program can be used as the currently running washing program.

[0050] In another example, the washing type corresponding to the clothes to be washed in the clothes washing device may be obtained to determine the washing program currently running in the clothes washing device based on the washing type.

[0051] In the above process, after the controller obtains the washing program currently running on the clothing washing and care device, it can determine the target starting voltage waveform corresponding to the motor according to the washing and care program, wherein the starting current value obtained by the motor under the target starting voltage waveform is lower than the current value output by the power supply, that is, the effective value of the current under the target starting voltage waveform is lower than the effective value of the current directly output by the power supply. After the effective value of the current obtained by the motor at startup is reduced, the instantaneous value of the current obtained by the motor at startup will also be reduced accordingly. Therefore, the target starting voltage waveform corresponding to the current washing and care program can ensure that the instantaneous value of the current obtained when the motor starts under the current washing and care program will not overshoot, thereby reducing the current impact on the control circuit of the motor, thereby effectively extending the service life of the motor, and accordingly, effectively suppressing the noise when the motor starts. At the same time, the target starting voltage waveform corresponding to the current washing and care program also makes it less likely that the voltage obtained from the power supply by other devices of the clothing washing and care device will fluctuate significantly when the motor is running under the current washing and care program, thereby reducing the interference of the motor on the operation of other devices at startup, thereby improving the operational stability of the clothing washing and care device.

[0052] The method for determining the target starting voltage waveform corresponding to the motor based on the washing program can be flexibly set as needed. In one example, the starting voltage waveform corresponding to the washing program can be obtained from a preset starting voltage waveform storage device according to the washing program and used as the target starting voltage waveform corresponding to the motor. In other words, the preset starting voltage waveform storage device can pre-store the starting voltage waveform corresponding to each washing program in the clothing washing device.

[0053] In another example, the starting voltage waveform corresponding to the washing program, i.e., the target starting voltage waveform corresponding to the motor, can also be obtained from a mobile memory according to the washing program. Storing the starting voltage waveforms corresponding to different washing programs in the mobile memory facilitates developers to subsequently update the starting voltage waveforms of the motor under different washing programs, thereby ensuring that the instantaneous current value obtained by the motor does not overshoot when the motor is started under different washing programs of the clothing washing device.

[0054] In an embodiment of the present application, after determining the target starting voltage waveform corresponding to the motor, the controller can control the on-off of the power electronic switch based on the target starting voltage waveform, so that the motor obtains a voltage waveform that is the same as the target starting voltage waveform, thereby reducing the effective value of the current obtained by the motor when the motor starts under the current washing and care program. Among them, the method of controlling the on-off of the power electronic switch based on the target starting voltage waveform can be flexibly set as needed. In one example, the on-time of the power electronic switch can be determined according to the target starting voltage waveform to control the on-off of the power electronic switch according to the on-time, that is, the timing is started in response to the control signal for driving the motor to start in the washing and care program. If the current timing time does not reach the on-time, the power electronic switch is controlled to be on, otherwise, the power electronic switch is controlled to be off.

[0055] In another example, the starting voltage corresponding to the target starting voltage waveform can be determined to control the on and off of the power supply according to the starting voltage, that is, the voltage currently obtained by the motor from the power supply is obtained in response to the control signal used to drive the motor to start in the washing and care program. If the current voltage does not reach the starting voltage, the power electronic switch is controlled to be turned on; otherwise, the power electronic switch is controlled to be turned off.

[0056] Through the above implementation, the controller first obtains the washing program currently running in the clothing washing and care equipment, and then determines the target starting voltage waveform corresponding to the motor according to the washing and care program, that is, determines the starting voltage waveform in which the instantaneous value of the current obtained from the power supply when the motor is started under the current washing and care program will not overshoot, and then controls the on and off of the power electronic switch based on the target starting voltage waveform, so that the motor obtains a voltage waveform identical to the target starting voltage waveform from the power supply through the power electronic switch, thereby reducing the effective value of the current obtained by the motor at startup, so that the instantaneous current obtained by the motor at startup is correspondingly reduced, thereby ensuring that the instantaneous value of the current obtained when the motor is started under the current washing and care program will not overshoot, and reducing the current impact on the control circuit of the motor, thereby achieving the purpose of extending the service life of the motor.

[0057] In another exemplary embodiment, the controller is further configured to perform the following steps in the process of determining the target starting voltage waveform corresponding to the motor according to the washing and care program:

[0058] Real-time monitoring of the washing time of clothing washing equipment;

[0059] Determine the stage of washing and care time in the washing and care program;

[0060] Determine the target starting voltage waveform corresponding to the motor according to the cleaning and maintenance stage.

[0061] It should be noted that in order to improve the washing effect of the washing program for the clothes to be washed, the clothing washing and care equipment can usually set multiple washing and care stages in the washing program to obtain different washing and care treatments through different washing and care stages, thereby optimizing the washing and care effect of the clothes to be washed. Among them, the washing and care stages include but are not limited to the water intake stage for fully soaking the clothes to be washed, the washing stage for washing the clothes to be washed, and the dehydration stage for removing water from the clothes to be washed. Of course, the three washing and care stages proposed above are only exemplary. In other embodiments, there can be multiple washing and care stages according to different washing and care programs, and no specific restrictions are made here. And considering that the washing and care treatment processes corresponding to different washing and care stages are different, that is, the actual operating conditions of the motor in different washing and care stages are also different.

[0062] In the above process, for the laundry machine, the washing stages in the washing program will switch as the washing time increases. Based on this, in order to determine the washing stage in the washing program, the controller can first monitor the washing time of the laundry machine in real time, and then determine the washing stage in the washing program where the washing time is located.

[0063] For example, in the current washing program, the first 10 minutes of the laundry machine's operation are the water-in phase, 10-20 minutes are the washing phase, 20-40 minutes are the rinsing phase, and 40-50 minutes are the dehydration phase. If the real-time monitoring shows that the laundry machine's washing time is 15 minutes, the washing phase determined in the washing program based on this washing time is the washing phase.

[0064] In an embodiment of the present application, after determining the wash and care stage in which the wash and care time falls within the wash and care program, the controller can determine the target starting voltage waveform corresponding to the motor based on the wash and care stage to ensure that the starting current corresponding to the motor starting in the wash and care stage based on the target starting voltage waveform does not overshoot. At the same time, by setting a corresponding starting voltage waveform for the motor in each wash and care stage, the difference between the motor's starting voltage waveform and the motor's actual operating conditions in the current wash and care stage is reduced, thereby ensuring that the motor's startup time in each wash and care stage is the minimum startup time.

[0065] In another exemplary embodiment, the laundry washing device 10 further includes a load sensor 21. Figure 2 As shown, the load sensor 21 is arranged in the box body 11 and is used to obtain the weight value of the clothes to be washed in the inner drum 12.

[0066] The load sensor 21 may be an electromagnetic sensor. After the laundry is placed in the laundry washing device 10, the load sensor 21 is deformed by the laundry, causing a change in capacitance within the load sensor 21. The capacitance change is then converted into a voltage signal, and the corresponding weight of the laundry in the laundry washing device 10 is output based on the voltage signal.

[0067] The controller 16 is also electrically connected to the load sensor 21, and in the process of determining the target starting voltage waveform corresponding to the motor according to the washing program, the controller is also configured to perform the following steps:

[0068] Get the weight value collected by the load sensor;

[0069] Determine the optimized starting voltage waveform corresponding to the motor according to the weight value;

[0070] The target startup voltage waveform is adjusted based on the optimized startup voltage waveform.

[0071] It should be noted that the higher the weight of the laundry placed in the inner drum of the laundry washing and care device, the greater the amount of drive required by the motor to rotate the inner drum, and thus the higher the starting voltage required by the motor in the current washing and care program. In addition, the maximum effective value of the voltage corresponding to the starting voltage is the effective value of the voltage output by the power supply. Conversely, if the weight of the laundry placed in the inner drum of the laundry washing and care device is lower, the amount of drive required by the motor to rotate the inner drum is lower, and thus the starting voltage required by the motor in the current washing and care program is lower.

[0072] In an embodiment of the present application, when the controller determines the target starting voltage waveform corresponding to the motor according to the washing program, it can first obtain the weight value collected by the load sensor, that is, based on the electrical connection between the controller and the load sensor, the load sensor is controlled to collect and obtain the weight value of the clothes to be washed currently placed in the inner drum, and then the optimized starting voltage waveform corresponding to the motor is determined according to the weight value, wherein the optimized starting voltage waveform represents the starting voltage waveform corresponding to the motor when driving the inner drum at the current weight value.

[0073] In the process of determining the optimized starting voltage waveform corresponding to the motor based on the weight value, it is taken into account that when the user uses the clothing washing and care device, the weight value of the clothes to be washed and care placed in the inner drum each time fluctuates greatly. Therefore, in an embodiment of the present application, after obtaining the weight value of the clothes to be washed and care, the corresponding target preset weight value range can be determined based on the weight value, and then the starting voltage waveform corresponding to the target preset weight value range is used as the optimized starting voltage waveform, thereby narrowing the range of the corresponding optimized starting voltage waveform by the preset weight value range, and then shortening the recognition time under the premise of determining the optimized starting voltage waveform with higher accuracy based on the weight value corresponding to the current clothes to be washed and care.

[0074] In an embodiment of the present application, after determining the optimized starting voltage waveform corresponding to the motor, the controller can adjust the target starting voltage waveform based on the optimized starting voltage waveform. This allows the controller to further determine the actual operating conditions of the motor using the weight of the laundry in the inner drum. This ensures that the instantaneous current value obtained when the motor is started using the target starting waveform adjusted based on the actual operating conditions does not overshoot. Furthermore, when the amount of drive required to rotate the inner drum under the current washing program is reduced, the motor can be less likely to waste excessive energy during startup.

[0075] Among them, the method of adjusting the target starting voltage waveform based on the optimized starting voltage waveform can be flexibly set as needed. Considering that the starting state of the motor is related to the voltage value obtained by the motor from the power supply. Therefore, in one example, the voltage values ​​corresponding to the optimized starting voltage waveform and the target starting voltage waveform can be obtained respectively; if the effective current value of the optimized starting voltage waveform is higher than the voltage value corresponding to the target starting voltage waveform, the optimized starting voltage waveform is used as the target starting voltage waveform to ensure that the instantaneous current value obtained from the power supply when the motor starts will not overshoot; if the effective current value of the optimized starting voltage waveform is lower than the voltage value corresponding to the target starting voltage waveform, the optimized starting voltage waveform is used as the target starting voltage waveform to avoid resource waste while ensuring that the instantaneous current value obtained from the power supply when the motor starts will not overshoot.

[0076] In another example, a preset adjustment range can be obtained first, and then the voltage values ​​corresponding to the optimized starting voltage waveform and the target starting voltage waveform are obtained respectively; if the difference between the voltage value of the optimized starting voltage waveform and the voltage value corresponding to the target starting voltage waveform exceeds the maximum or minimum value of the adjustment range, the optimized starting voltage waveform is used as the target starting voltage waveform to reduce the adjustment frequency of the target starting voltage waveform, thereby improving the starting response speed of the motor. In addition, the preset adjustment range can be flexibly set according to actual needs, for example, a corresponding adjustment range can be set for each washing and care program, or a corresponding adjustment range can be set for each weight value; there is no restriction here.

[0077] In another exemplary embodiment, the controller is further configured to perform the following steps:

[0078] Determine the corresponding operating voltage waveform of the motor according to the cleaning and maintenance procedures;

[0079] Calculating a waveform interval corresponding to a target starting voltage waveform based on an operating voltage waveform;

[0080] Determine the location of the target energized period in the waveform interval;

[0081] A target startup voltage waveform is generated according to the waveform interval and the position of the target power-on cycle.

[0082] In the above process, after the controller obtains the washing program currently running in the clothing washing equipment, it can first determine the operating voltage waveform corresponding to the motor according to the washing program, wherein the operating voltage waveform represents the voltage waveform that the motor normally obtains from the power supply under the current washing program, that is, the voltage fluctuation that the motor should actually obtain from the power supply when running under the current washing program.

[0083] The method for determining the operating voltage waveform corresponding to the motor according to the washing program can be flexibly set as needed. In one example, the controller can obtain the operating voltage waveform corresponding to the current washing program from a preset operating voltage waveform memory. In other words, the preset operating voltage waveform memory can pre-store the operating voltage waveforms corresponding to different washing programs in the clothing washing device.

[0084] In another example, the controller can first obtain the operating parameters corresponding to the motor in the washing and care program, and then determine the operating voltage waveform corresponding to the motor based on the operating parameters to improve the accuracy of the determined operating voltage waveform of the motor, wherein the operating parameters represent the actual operating conditions of the motor, and the operating parameters include but are not limited to the operating time and rotation-stop ratio of the motor in the washing and care program.

[0085] Because the starting current required for a motor to start varies under different actual operating conditions, in an embodiment of the present application, after the controller determines the operating voltage waveform corresponding to the motor drive device according to the washing and care program, it can calculate the waveform interval corresponding to the target starting voltage waveform based on the operating voltage waveform to determine the adjustment range of the target starting voltage waveform.

[0086] The method for calculating the waveform interval corresponding to the target startup voltage waveform based on the operating voltage waveform can be flexibly set according to actual needs. In one example, the number of cycles corresponding to the operating voltage waveform can be obtained, the number of cycles of the target startup voltage waveform can be calculated based on the number of cycles corresponding to the operating voltage waveform and a preset coefficient corresponding to the number of cycles, and the waveform interval corresponding to the target startup voltage waveform can be determined based on the number of cycles of the target startup voltage waveform.

[0087] In another example, the operating duration corresponding to the operating voltage waveform can be obtained, the operating duration of the target starting voltage waveform can be calculated based on the operating duration corresponding to the operating voltage waveform and the preset coefficient corresponding to the operating duration, and then the waveform interval corresponding to the target starting voltage waveform can be determined based on the operating duration of the target starting voltage waveform.

[0088] In an embodiment of the present application, after the controller determines the waveform interval corresponding to the target starting voltage waveform, it can continue to determine the position of the target power-on period in the waveform interval, wherein the target power-on period represents the period in which the motor can obtain current from the power supply of the clothing washing device in the waveform interval of the target starting voltage waveform, and other periods in the waveform interval except the target power-on period represent the period in which the motor cannot obtain current from the power supply of the clothing washing device in the waveform interval of the target starting voltage waveform.

[0089] In addition, the target power cycle can be a single AC voltage cycle in the waveform interval, that is, a cycle obtained by combining a single positive voltage cycle and a single negative voltage cycle. It can also be a single positive voltage cycle or a single negative voltage cycle in the waveform interval.

[0090] The method for determining the position of the target power-on cycle in the waveform interval can be flexibly set as needed. In one example, the number of cycles in the waveform interval is obtained, and the position of the target power-on cycle is determined based on the number of cycles in the waveform interval and the preset position corresponding to the number of cycles. The preset position can be adjusted according to actual conditions. However, in the case where the target power-on cycle is a single positive voltage cycle or a single negative voltage cycle, the preset position retains the alternating positive and negative polarity characteristics of the voltage obtained by the motor from the power supply, thereby ensuring that the motor can start normally when connected to the power supply based on the target starting voltage waveform.

[0091] In another example, the position of the target power-on period in the waveform interval may be calculated according to the following formula.

[0092] Su=1+(2M-1)(Nu-1);

[0093] Among them, Su is the position of the u-th target power-on cycle in the waveform interval, M is the preset voltage waveform order, Nu is the preset number of power-on cycles; and 1≤Nu≤C, C is the number of cycles in the waveform interval.

[0094] The above formula can also ensure that the polarity of the target power-on cycle is opposite to that of the adjacent target power-on cycle when the target power-on cycle is a single positive voltage cycle or a single negative voltage cycle.

[0095] Among them, the preset voltage waveform order is used to control the interval between each target power-on cycle when multiple target power-on cycles are determined; the interval between each target power-on cycle represents the number of power-on cycles between each target power-on cycle; the target power-on cycle is the power-on cycle in the motor voltage waveform.

[0096] It should be noted that when calculating the target power cycle, if C is equal to 1, then Nu is determined to be 1 and Nu is 1 is substituted into the formula Su=1+(2M-1)(Nu-1) for calculation to obtain 1 target power cycle, and the target power cycle is 1.

[0097] If C is greater than 1, Nu is sequentially determined as a positive integer between 1 and C, inclusive, to obtain C Nus, i.e., N1=1, N2=2, ..., NC=C. Each Nu, i.e., N1, N2, ..., NC, is then sequentially substituted into the formula Su=1+(2M-1)(Nu-1) to calculate and obtain C target power cycles.

[0098] In the embodiments of the present application, after determining the position of the target power cycle, the controller can generate a target starting voltage waveform based on the waveform interval and the position of the target power cycle, that is, determine the target starting voltage waveform corresponding to the motor under the current washing and care program. In addition, in the above embodiment, determining the target starting voltage waveform corresponding to the motor according to the washing and care stage or determining the optimized starting voltage waveform corresponding to the motor according to the weight value can both be determined according to the above embodiments and are not further described here.

[0099] The method of generating the target startup voltage waveform according to the waveform interval and the position of the target power-on period can be flexibly set as needed. In one example, the periods corresponding to positions other than the position of the target power-on period in the waveform interval can be eliminated, so that the waveform interval with the periods corresponding to other positions eliminated is used as the target startup voltage waveform. Specifically, the schematic diagram of the target startup voltage waveform corresponding to the above example can be referred to. Figure 3 shown.

[0100] In another example, the controller can obtain a preset starting voltage corresponding to the motor in a wash and care program, and then determine the power-on start point and power-on end point in the target power-on cycle based on the preset starting voltage, thereby generating a target starting voltage waveform based on the power-on start point and power-on end point. The preset starting voltage can be flexibly adjusted according to actual needs and is not limited here.

[0101] For example, when the preset starting voltage is half of the voltage output by the power supply, the power-on start point and the power-on end point in the target power-on cycle are determined according to the preset starting voltage, that is, the voltage obtained from the power supply between the power-on start point and the power-on end point is half of the voltage output by the power supply, and then the target starting voltage waveform is generated based on the power-on start point and the power-on end point.

[0102] Considering that the preset starting voltage can be composed of the power-on starting point and the corresponding power-on cut-off point at different positions in the target power-on cycle, the schematic diagram of the target starting voltage waveform corresponding to the above example can be referred to. Figure 4 As shown, the target power cycle includes a power start point and a power end point. The schematic diagram of the target startup voltage waveform corresponding to the above example can also be referred to Figure 5 As shown, the target power-on cycle includes multiple power-on starting points and multiple power-on ending points, so as to ensure that the current obtained by the motor from the power supply based on the target starting voltage waveform will not overshoot, while increasing the frequency of the motor obtaining current from the power supply, thereby improving the driving stability of the motor.

[0103] In another exemplary embodiment, the laundry equipment may further include a voltage monitoring module. Figure 6 As shown, the voltage monitoring module 61 is provided in the housing 11 of the clothing washing and care device 10 , and the voltage monitoring module 61 is used to monitor the voltage waveform output by the power supply in real time.

[0104] The controller 16 is also electrically connected to the voltage monitoring module 61, and is further configured to perform the following steps in the process of controlling the on and off of the power electronic switch based on the target starting voltage waveform:

[0105] Obtain the voltage waveform monitored by the voltage monitoring module in real time;

[0106] When the voltage waveform reaches the power-on starting point corresponding to the target starting voltage waveform, the power electronic switch is controlled to be turned on; when the voltage waveform reaches the power-on cut-off point corresponding to the target starting voltage waveform, the power electronic switch is controlled to be turned off.

[0107] In the above process, when the controller controls the on and off of the power electronic switch based on the target starting voltage waveform, it can first obtain the voltage waveform monitored by the voltage monitoring module in real time, that is, based on the electrical connection between the controller and the voltage monitoring module, control the voltage monitoring module to collect and obtain the voltage waveform output by the power supply, and then when the voltage waveform reaches the power-on starting point corresponding to the target starting voltage waveform, control the power electronic switch to turn on, so that the motor can obtain the current value from the power supply through the power electronic switch to start running. When the voltage waveform reaches the power-on cut-off point corresponding to the target starting voltage waveform, control the power electronic switch to turn off, so that the motor cannot obtain the current value from the power supply for starting running through the power electronic switch, thereby ensuring that overshoot is not likely to occur when the motor obtains current from the power supply for starting.

[0108] Through the above implementation, it is possible to judge in turn whether the voltage waveform output by the power supply is at the power-on starting point or the power-on cut-off point in the target starting voltage waveform, so that when the voltage waveform output by the power supply is at the power-on starting point in the target starting voltage waveform, the power electronic switch is controlled to be turned on, and when the voltage waveform output by the power supply is at the power-on cut-off point in the target starting voltage waveform, the power electronic switch is controlled to be turned off, and when the voltage waveform output by the power supply is neither at the power-on starting point nor at the power-on cut-off point, the on and off of the power electronic switch is not changed, thereby ensuring that when the motor is in the operating voltage waveform corresponding to the washing and care program, all waveform intervals except the waveform interval corresponding to the target starting voltage waveform can normally obtain the corresponding current value from the power supply for operation.

[0109] Figure 7 This is a flow chart of a method for controlling a motor in a clothing washing and care device provided in an embodiment of the present application. Combined with the structural diagram of the clothing washing and care device provided above, the method for controlling a motor in the clothing washing and care device includes the following steps S01 to S12:

[0110] Step S01, obtaining the washing program currently running on the clothing washing device.

[0111] Step S02: monitor the washing time of the clothing washing equipment in real time.

[0112] Step S03: determining the washing and care stage in the washing and care program in which the washing and care time is located.

[0113] Step S04 , in response to the control signal of the motor in the washing and care stage, determining the operating voltage waveform corresponding to the motor according to the washing and care stage.

[0114] The control signal of the motor in the washing and care stage represents a signal for controlling the motor to start operation in the washing and care stage.

[0115] Step S05 : calculating a waveform interval corresponding to the target starting voltage waveform based on the operating voltage waveform.

[0116] Step S06: determine the position of the target power-on period in the waveform interval.

[0117] Step S07: obtaining a preset starting voltage corresponding to the motor in the washing and care stage.

[0118] Step S08 , determining a power-on start point and a power-on end point in a target power-on cycle according to a preset starting voltage.

[0119] Step S09 : generating a target startup voltage waveform based on the power-on start point and the power-on end point.

[0120] In one example, the implementation process of the above steps S04 to S09 can be performed in real time in response to the control signal of the motor during the washing and care stage to improve the accuracy of the generated target starting voltage waveform. In another example, the developer can pre-set and generate a corresponding target starting voltage waveform for each washing and care stage according to the above operation process, thereby shortening the processing time of the clothing washing and care equipment. Accordingly, the implementation process of the above steps S04 to S09 can be simplified to responding to the control signal of the motor during the washing and care stage to obtain the target starting voltage waveform corresponding to the motor in the washing and care stage.

[0121] Step S10: acquiring the voltage waveform monitored by the voltage monitoring module in real time.

[0122] During the execution of step S10, the implementation processes of step S11 and step S12 can be executed simultaneously, and the details are as follows:

[0123] Step S11 : When the voltage waveform reaches the power-on starting point corresponding to the target starting voltage waveform, the power electronic switch is controlled to be turned on.

[0124] Step S12: When the voltage waveform reaches the energization cut-off point corresponding to the target starting voltage waveform, the power electronic switch is controlled to be disconnected.

[0125] Through the above steps S11 and S12, the power supply controls the power electronic switch to turn on when the voltage waveform output by the power supply is at the power-on starting point of the target starting voltage waveform, and controls the power electronic switch to turn off when the voltage waveform output by the power supply is at the power-on cut-off point of the target starting voltage waveform, thereby ensuring that overshoot is not likely to occur when the motor obtains current from the power supply for starting. At the same time, when the voltage waveform output by the power supply is neither at the power-on starting point nor at the power-on cut-off point, the on and off of the power electronic switch is not changed, thereby ensuring that the motor can normally obtain the corresponding current value from the power supply for operation in other waveform intervals of the operating voltage waveform corresponding to the washing and maintenance stage, except for the waveform interval corresponding to the target starting voltage waveform.

[0126] In addition, considering that the washing and care program includes multiple washing and care stages, after the implementation of the above-mentioned steps S11 and S12, step S13 is executed, and in response to the end signal of the washing and care stage, the execution returns to step S02, so that when the motor starts in the next washing and care stage of the washing and care program, it can start and run based on the target starting voltage waveform corresponding to the next washing and care stage, thereby ensuring that the motor is not prone to overshoot in each washing and care stage of the washing and care program.

[0127] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some or all of the technical features therein. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present application.

[0128] For ease of explanation, the above description has been presented in conjunction with specific embodiments. However, the above exemplary discussion is not intended to be exhaustive or to limit the embodiments to the specific forms disclosed above. Based on the above teachings, various modifications and variations are possible. The above embodiments have been selected and described to better explain the principles and practical applications, thereby enabling those skilled in the art to better utilize the embodiments and various different variations of the embodiments suitable for specific use considerations.

Claims

1. A clothing washing and care device, characterized in that: include: A box body, the box body including an inner drum for placing clothes to be washed and a motor for driving the inner drum to rotate; A power electronic switch, used to control the on / off connection between the motor and the power supply of the laundry equipment; A controller is electrically connected to the power electronic switch, and the controller is further configured to perform the following steps: Obtaining the laundry program currently running on the laundry equipment; determining a target starting voltage waveform corresponding to the motor according to the washing and care program, wherein a starting current value obtained by the motor under the target starting voltage waveform is lower than a current value output by the power supply; The power electronic switch is controlled to be turned on and off based on the target starting voltage waveform, so that the motor obtains a voltage waveform identical to the target starting voltage waveform from the power supply through the power electronic switch.

2. The clothing washing and care device according to claim 1, characterized in that: The controller is further configured to perform the following steps: In the process of determining the target starting voltage waveform corresponding to the motor according to the washing program, monitoring the washing time of the clothing washing device in real time; Determining the washing and care stage in which the washing and care time is located in the washing and care program; The target starting voltage waveform corresponding to the motor is determined according to the washing and care stage.

3. The clothing washing and care device according to claim 1, characterized in that: The clothing washing and care device further comprises a load sensor, which is used to obtain the weight value of the clothing to be washed and care in the inner drum; The controller is electrically connected to the load sensor, and is further configured to perform the following steps: In the process of determining the target starting voltage waveform corresponding to the motor according to the washing and care program, obtaining the weight value collected by the load sensor; Determining an optimized starting voltage waveform corresponding to the motor according to the weight value; The target startup voltage waveform is adjusted based on the optimized startup voltage waveform.

4. The clothing washing and care device according to claim 3, characterized in that: The controller is further configured to perform the following steps: Respectively obtaining current values ​​corresponding to the optimized starting voltage waveform and the target starting voltage waveform; If the current value of the optimized startup voltage waveform is lower than the current value corresponding to the target startup voltage waveform, the optimized startup voltage waveform is used as the target startup voltage waveform.

5. The clothing washing and care device according to claim 1, characterized in that: The controller is further configured to perform the following steps: Determining the operating voltage waveform corresponding to the motor according to the washing and care program; Calculating a waveform interval corresponding to the target starting voltage waveform based on the operating voltage waveform; Determining a position of a target power-on period in the waveform interval; The target startup voltage waveform is generated according to the waveform interval and the position of the target power-on cycle.

6. The clothing washing and care device according to claim 5, characterized in that: The controller is further configured to perform the following steps: In determining the operating voltage waveform corresponding to the motor according to the washing and care program, obtaining the operating parameters of the motor in the washing and care program; An operating voltage waveform corresponding to the motor is determined based on the operating parameters.

7. The clothing washing and care device according to claim 5, characterized in that: The controller is further configured to perform the following steps: In the process of determining the position of the target power cycle in the waveform interval, the position of the target power cycle in the waveform interval is calculated according to the following formula, including: Su=1+(2M-1)(Nu-1); Among them, Su is the position of the u-th target power-on cycle in the waveform interval, M is the preset voltage waveform order, Nu is the preset number of power-on cycles; and 1≤Nu≤C, C is the number of cycles in the waveform interval.

8. The clothing washing and care device according to claim 5, characterized in that: The controller is further configured to perform the following steps: In the process of generating the target starting voltage waveform according to the waveform interval and the position of the target power-on cycle, obtaining a preset starting voltage corresponding to the motor in the washing and care program; Determining a power-on start point and a power-on end point in the target power-on cycle according to the preset starting voltage; The target startup voltage waveform is generated based on the power-on start point and the power-on end point.

9. The clothing washing and care device according to claim 8, characterized in that: The target power-on cycle includes a plurality of power-on start points and a plurality of power-on end points.

10. The clothing washing and care device according to claim 1, characterized in that: The clothing washing and care device further includes a voltage monitoring module, which is used to monitor the voltage waveform output by the power supply in real time; The controller is electrically connected to the voltage monitoring module, and is further configured to perform the following steps: In the process of controlling the on and off of the power electronic switch based on the target starting voltage waveform, obtaining the voltage waveform monitored by the voltage monitoring module in real time; When the voltage waveform reaches the power-on starting point corresponding to the target starting voltage waveform, controlling the power electronic switch to be turned on; When the voltage waveform reaches the power-on cut-off point corresponding to the target starting voltage waveform, the power electronic switch is controlled to be disconnected.

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