Roller washing machine

Abstract

The embodiment of the invention provides a roller washing machine. The drum washing machine includes: a housing; the roller is arranged in the shell; the motor is used for providing power to drive the roller to work; the water inlet valve is used for controlling water to enter the roller; the controller is electrically connected with the motor and the water inlet valve, and the controller is configured to execute the following steps that when a weighing instruction for the motor is received, the motor controls the roller to work at a first rotating speed, and the running power of the motor is calculated; on the basis of the operation power and a preset power threshold value, whether clothes in the roller are in a winding state or not is judged; if yes, the water inlet valve is controlled to be opened, and the roller is controlled to work at a second rotating speed through the motor, so that the clothes in the roller are evenly distributed; and starting and running a weighing program. Therefore, the weighing accuracy of the motor can be improved.

Description

Technical Field

[0001] The present application relates to the technical field of washing machines, and in particular to a drum washing machine. Background Art

[0002] Currently, the washing machine motor weighing in the industry is to directly accelerate the motor from zero to a specified speed to obtain the motor's accelerated operating power, and then rotate it at a constant speed at the specified speed to obtain the motor's uniform operating power, thereby distinguishing clothes of different weights based on the accelerated operating power and uniform operating power.

[0003] However, if the weighing is performed by directly accelerating from zero to a specified speed, the motor weighing accuracy may be low due to the clothes being entangled; and if there are too many clothes in the barrel, the clothes will hit the door during the rolling process, thereby affecting the normal operating power of the motor and further reducing the motor weighing accuracy.

[0004] Therefore, there is an urgent need for a drum washing machine that can improve the weighing accuracy of the motor. Summary of the invention

[0005] In order to solve the above technical problems, an embodiment of the present application provides a drum washing machine.

[0006] Other features and advantages of the present application will become apparent from the following detailed description, or may be learned in part by the practice of the present application.

[0007] According to one aspect of an embodiment of the present application, the embodiment of the present application provides a drum washing machine, comprising: a shell; a drum arranged in the shell; a motor, used to provide power to drive the drum to work; a water inlet valve, used to control the water inlet into the drum; a controller, electrically connected to the motor and the water inlet valve, respectively, and the controller is configured to perform the following steps: when receiving a weighing instruction for the motor, controlling the drum to operate at a first speed through the motor and calculating the operating power of the motor; based on the operating power and a preset power threshold, determining whether the clothes in the drum are in a tangled state; if it is determined to be yes, controlling the water inlet valve to open, and controlling the drum to operate at a second speed through the motor to make the clothes in the drum evenly distributed; starting the weighing program.

[0008] In the above embodiment, when a weighing instruction for the motor is received, the drum is controlled by the motor to operate at a first speed, and the clothes in the drum can be initially evenly distributed through shaking processing; and the operating power of the motor is calculated according to the first speed, and then it is determined whether the clothes in the drum are in a tangled state according to the operating power and the preset power threshold. If it is determined that the clothes in the drum are in a tangled state, the water inlet valve is controlled to open to allow water to flow into the drum to ensure that the clothes in the drum do not hit the door. While adding water, the drum is controlled by the motor to operate at a second speed to further ensure that the clothes in the drum are evenly distributed, and then the weighing program is started, thereby improving the accuracy of the motor weighing.

[0009] In one embodiment of the present application, based on the aforementioned scheme, the controller is further configured to perform the following steps: controlling the drum to increase from a third speed to a fourth speed through the motor, and calculating the rising operating power of the motor; controlling the drum to run at a constant speed at the fourth speed through the motor, and calculating the uniform operating power of the motor; and obtaining the weight value of the clothes in the drum based on the difference between the rising operating power and the uniform operating power.

[0010] In one embodiment of the present application, based on the aforementioned scheme, the drum washing machine also includes a water level sensor, the controller is connected to the water level sensor, and the controller is also configured to perform the following steps: when receiving a signal from the water level sensor indicating that the water level in the drum reaches above a preset water level, controlling the closing of the water inlet valve.

[0011] In the above embodiment, a water level sensor is also provided in the drum washing machine, which can accurately control the water level value in the drum washing machine, thereby fully ensuring that the clothes in the drum will not hit the door and making the clothes in the drum more evenly distributed.

[0012] In one embodiment of the present application, based on the aforementioned solution, the water inlet valve is provided with a water meter; the controller is further configured to perform the following steps: controlling the water inlet valve to close when the water inlet amount of the water inlet valve reaches a preset water inlet amount.

[0013] In the above embodiment, the water inlet valve is also provided with a water meter, which can accurately detect the amount of water flowing into the drum from the water inlet valve. When the water flow into the water inlet valve reaches a preset amount, the water inlet valve is closed in time, while ensuring that the water flow into the drum reaches the preset amount, thereby fully ensuring that the clothes in the drum will not be stuck to the door and making the clothes in the drum more evenly distributed.

[0014] In one embodiment of the present application, based on the above-mentioned solution, the controller is further configured to perform the following steps: based on the second rotation speed, further control the drum to operate at a preset rotation angle and / or a preset duration.

[0015] In the above embodiment, when the drum is controlled to operate at the second rotation speed, the drum is further accurately controlled to operate at a preset rotation angle and / or a preset duration, thereby fully ensuring that the clothes in the drum are evenly distributed.

[0016] In some embodiments of the present application, based on the above technical solution, the second rotation speed is between 35 and 60 revolutions per second.

[0017] In the above embodiment, the motor controls the drum to operate at a speed between 35 and 60 revolutions per second, so that the clothes in the drum can be better evenly distributed.

[0018] In some embodiments of the present application, based on the above technical solution, the preset rotation angle is between 45 degrees and 120 degrees.

[0019] In the above embodiment, the motor controls the drum to rotate at an angle between 45 and 120 degrees, so that the clothes in the drum can be more evenly distributed.

[0020] In some embodiments of the present application, based on the above technical solution, the preset duration is between 20 seconds and 40 seconds.

[0021] In the above embodiment, the motor controls the drum to operate for a preset duration between 20 seconds and 40 seconds, so that the clothes in the drum can be better evenly distributed.

[0022] In some embodiments of the present application, based on the above technical solution, the controller is further configured to perform the following steps: if it is determined that the clothes in the drum are not in a tangled state, the drum is controlled by the motor to operate at the second speed.

[0023] In the above embodiment, if it is determined that the clothes in the drum are not in a tangled state, the motor is still used to control the drum to operate at the second speed, thereby further ensuring that the clothes in the drum are evenly distributed.

[0024] 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

[0025] 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:

[0026] Figure 1 This is the step flow chart for motor weighing currently proposed in the industry;

[0027] Figure 2 is a structural schematic diagram of a drum washing machine provided by an exemplary embodiment of the present application;

[0028] Figure 3 is a flowchart of steps that can be executed by a controller in a drum washing machine provided by an exemplary embodiment of the present application;

[0029] Figure 4 is a timing diagram of program operation control provided by an exemplary embodiment of the present application;

[0030] Figure 5 is a flowchart of the steps of the weighing program operation provided by an exemplary embodiment of the present application;

[0031] Figure 6 is a timing diagram for controlling the rotation speed of a drum provided by an exemplary embodiment of the present application;

[0032] Figure 7 is a timing diagram for controlling the rotation speed of a drum provided by another exemplary embodiment of the present application;

[0033] Figure 8 It is a timing diagram for controlling the drum speed operation provided by another exemplary embodiment of the present application. DETAILED DESCRIPTION

[0034] Here, exemplary embodiments will be described in detail, examples of which are shown in the accompanying drawings. When the following description refers to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The implementations described in the following exemplary embodiments do not represent all implementations consistent with the present application. Instead, they are only examples of devices and methods consistent with some aspects of the present application as detailed in the attached claims.

[0035] 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.

[0036] 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.

[0037] It should also be noted that the "multiple" mentioned in this application refers to two or more than two. "And / or" describes the association relationship of the associated objects, indicating that there can be three relationships. For example, A and / or B can mean: 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.

[0038] The terms "first", "second", "third" and "fourth" etc. in the specification and claims of the present application and the drawings are used to distinguish different objects, rather than to describe a specific order. The terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions. For example, a process, method, system, product or device comprising a series of steps or units is not limited to the listed steps or units, but may optionally include steps or units that are not listed, or may optionally include other steps or units inherent to these processes, methods, products or devices.

[0039] Currently, the washing machine motor weighing in the industry is to directly accelerate the motor from zero to a specified speed to obtain the motor's accelerated operating power, and then rotate it at a constant speed at the specified speed to obtain the motor's uniform operating power, thereby distinguishing clothes of different weights based on the accelerated operating power and uniform operating power.

[0040] like Figure 1 As shown, Figure 1 This is a flowchart of the steps of motor weighing proposed in the industry. When a weighing instruction is received for the motor, the motor controls the drum to accelerate from zero to the specified speed, and the motor's rising power is calculated; then the motor controls the drum to run at a constant speed at the specified speed, and the motor's uniform speed power is calculated; finally, based on the rising power and uniform speed power, the weight of the clothes in the drum is obtained.

[0041] However, in the above process, the weighing is performed by directly accelerating from zero to the specified speed, which may cause low motor weighing accuracy due to the clothes being entangled; and if there are too many clothes in the barrel, the clothes will hit the door during the rolling process, thereby affecting the normal operating power of the motor and further reducing the motor weighing accuracy.

[0042] The present applicant has conducted a large number of tests based on the current motor weighing steps in the industry and found that it is impossible to accurately determine the error between the actual weight value of the clothes in the drum and the measured weight value of the clothes within 0.5 kg. In some tests, the clothes in the drum are even completely entangled, resulting in the actual weight value of the clothes in the drum and the measured weight value of the clothes can differ by more than 1.5 kg. Such a large error will also affect the subsequent washing process, resulting in poor washing effect of the clothes in the drum.

[0043] In order to solve the above technical problems, the present application proposes a drum washing machine. Figure 2 Schematic diagram of the structure of a drum washing machine provided by an exemplary embodiment of the present application. Figure 2 As shown, the drum washing machine 20 includes a housing 21, a drum 22, a motor 23 (not shown), a water inlet valve 24 (not shown) and a controller (not shown). The following will introduce each part of the drum washing machine 20 one by one.

[0044] The housing 21 is the outer structure of the drum washing machine 20, and is used to fix and protect the internal components. The housing 21 is usually made of metal or plastic; a door is usually provided on the housing 21 for putting clothes into or taking them out of the drum 22, and the door is usually equipped with a sealing ring to prevent water leakage; a control panel is usually provided on the housing 21, and there are buttons, knobs or touch screens on the control panel for users to select washing programs, temperature, speed and make other settings on the control panel.

[0045] The drum 22 is disposed inside the shell 21 and is usually made of stainless steel or plastic. It is used to place and wash clothes. A washing tank and ribs are usually provided inside the drum 22 to clean the clothes through friction and impact, which helps to increase the washing effect.

[0046] The motor 23 is the power source of the drum washing machine 20 and is responsible for providing power to drive the drum 22 to perform washing and dehydration operations. The motor 23 can adjust the speed, rotation angle, rotation direction and rotation time of the drum 22 through the control circuit to adapt to different washing programs and user needs.

[0047] The water inlet valve 24 is connected to a water supply pipe or a faucet, and is used to control the water inlet into the drum 22; the water inlet valve 24 can control the opening and closing of the water flow, as well as the temperature of the water.

[0048] The controller is electrically connected to the motor 23 and the water inlet valve 24, respectively. Figure 3 , Figure 3 1 is a flowchart of steps that can be executed by a controller in a drum washing machine provided by an exemplary embodiment of the present application. The controller can be configured to execute the following steps S310-S340:

[0049] S310, when a weighing instruction for the motor is received, controlling the drum to operate at a first speed through the motor and calculating the operating power of the motor;

[0050] S320, determining whether the clothes in the drum are in a tangled state based on the operating power and a preset power threshold;

[0051] S330, if the determination is yes, then control the water inlet valve to open, and control the drum to operate at a second speed through the motor, so that the clothes in the drum are evenly distributed;

[0052] S340, start the weighing program.

[0053] These four steps are described in detail below.

[0054] In S310, the weighing instruction of the motor can be issued through the control panel on the shell, or can be issued to the designated drum washing machine through the mobile terminal. This application does not limit the way of issuing the weighing instruction of the motor. When the weighing instruction for the motor is received, the drum washing machine is controlled to execute the uniform program and the weighing program in sequence. Among them, the process of the drum washing machine executing the uniform program includes S310-S330, wherein S310 controls the drum to work at a first speed through the motor and calculates the operating power of the motor, for example, the first speed is 35 revolutions per second. Since the state of the clothes placed in the drum is unknown, the clothes may be in a tangled state or a uniformly distributed state. Therefore, this application chooses to control the drum to work at a first speed through the motor when receiving the weighing instruction for the motor. The purpose is to make the clothes in the drum initially evenly distributed. If the clothes placed in the drum are already in a uniformly distributed state, the clothes in the drum can also be distributed more evenly by shaking them out.

[0055] Among them, the operating power of the motor can be calculated using the following two calculation methods.

[0056] In an exemplary embodiment, the running current of the motor is measured by a current sensor or a Hall effect sensor installed on the motor power line; the running voltage of the motor is measured by a voltage sensor or a voltage probe connected to the motor power line; the running power of the motor is calculated according to the calculation formula of the running power of the motor: running power (W) = running voltage (V) × running current (A), and the running current and running voltage are measured respectively, so as to calculate the running power of the motor. Preferably, considering the influence of the power factor on the running power of the motor, the calculation formula for calculating the running power of the motor can be optimized as follows: running power (W) = running voltage (V) × running current (A) × power factor. Since the power factor is combined when calculating the running power of the motor, the running power of the motor can be calculated more accurately, thereby improving the accuracy of subsequent motor weighing.

[0057] In another exemplary embodiment, a characteristic curve corresponding to the motor in the drum washing machine is obtained in advance through a technical specification sheet or a performance curve chart of the motor, wherein the characteristic curve corresponding to the motor can indicate the torque value of the motor at different speeds; the operating torque and the operating speed of the motor are respectively measured by the torque sensor and the speed sensor of the motor; and the operating power of the motor is calculated according to the calculation formula of the operating power of the motor: operating power (W) = 2π × operating speed (rpm) × operating torque (N·m), and the operating torque and operating speed obtained by respectively measuring the measured operating power.

[0058] In S320, if the operating power reaches above the preset power threshold, that is, the operating power of the motor is greater than or equal to the preset power threshold, it is determined that the clothes in the drum are in a tangled state; if the operating power does not reach above the preset power threshold, that is, the operating power of the motor is less than the preset power threshold, it is determined that the clothes in the drum are not in a tangled state.

[0059] In an exemplary embodiment, if it is determined that the clothes in the drum are not in a tangled state, the motor is used to control the drum to operate at a second speed, thereby further ensuring that the clothes in the drum are evenly distributed.

[0060] In S330, if it is determined that the clothes in the drum are in a tangled state, the water inlet valve is controlled to be opened to allow water to enter the drum, and the drum is controlled by the motor to operate at the second speed, so that the clothes in the drum are thoroughly and evenly distributed. Controlling the water inlet valve to allow water to enter the drum helps to increase the humidity in the drum, reduce friction and electrostatic effects, and make it easier to separate the clothes in the drum. By opening the water inlet valve to allow water to enter the drum, it can also ensure that the clothes in the drum will not be pushed against the door. While adding water, the drum is controlled by the motor to operate at the second speed to further ensure that the clothes in the drum are evenly distributed. When the clothes in the drum are thoroughly and evenly distributed, the motor is weighed, which can improve the accuracy of subsequent motor weighing.

[0061] Preferably, the second rotation speed is lower than the normal rotation speed of the drum washing machine when running a washing program, so as to reduce the friction between the clothes in the drum and help to untangle the tangled clothes.

[0062] In another exemplary embodiment, the drum is controlled by a motor to stop periodically and to operate at a second, lower speed when the drum starts to operate, which helps to reduce friction between clothes in the drum. The drum is then gradually controlled to accelerate to evenly distribute the clothes in the drum.

[0063] Furthermore, if it is determined that the clothes in the drum are in a tangled state, the motor can be used to control the drum to first run in the opposite direction, and then control the drum to resume its normal running direction, thereby effectively reducing the entanglement between the clothes in the drum.

[0064] It should be noted that there is no clear relationship between the first speed and the second speed, the first speed may be greater than the second speed, the first speed may be less than the second speed, or the first speed may be equal to the second speed. For example, the second speed may be between 35 and 60 revolutions per second.

[0065] Further, based on the second rotation speed, the drum is controlled to operate at a preset rotation angle and / or a preset duration.

[0066] On the basis of controlling the drum to work at the second speed by the motor, the drum can be further controlled to work at a preset rotation angle and / or a preset duration, and the second speed and the preset rotation angle and / or the preset duration can be combined with each other. Specifically, the drum can be controlled by the motor to work at the second speed and the preset rotation angle; the drum can be controlled by the motor to work at the second speed and the preset duration; and the drum can be controlled by the motor to work at the second speed, the preset rotation angle and the preset duration at the same time.

[0067] Exemplarily, the preset rotation angle may be between 45 degrees and 120 degrees, and the preset duration may be between 20 seconds and 40 seconds, so that the clothes in the drum can be better evenly distributed.

[0068] In an exemplary embodiment, the drum washing machine further comprises a water level sensor, and the controller is connected to the water level sensor. When receiving a signal from the water level sensor indicating that the water level in the drum reaches above a preset water level, the controller controls the water inlet valve to close and stop the water discharge.

[0069] This embodiment provides a water level sensor to accurately control the water level in the drum washing machine, thereby fully ensuring that the clothes in the drum will not be pushed against the door and making the clothes in the drum more evenly distributed.

[0070] In another exemplary embodiment, the water inlet valve is provided with a water meter, and when the water inlet volume of the water inlet valve reaches a preset water inlet volume, the water inlet valve is controlled to be closed, for example, the preset water inlet volume is 5 L. The water meter can be embedded in the water inlet valve, so that the water meter and the water inlet valve are tightly integrated, and the water inlet volume can be monitored more accurately; the water meter can also be arranged near the water inlet valve, for example, installed in the water inlet pipe, so that the water meter can measure the water inlet volume before the water enters the drum, so as to ensure accurate control and monitoring of the water inlet volume.

[0071] This embodiment can accurately detect the amount of water flowing into the drum from the water inlet valve by setting a water meter. When the water flowing into the water inlet valve reaches a preset amount, the water inlet valve is closed in time, while ensuring that the water flowing into the drum reaches the preset amount, thereby fully ensuring that the clothes in the drum will not be stuck to the door and making the clothes in the drum more evenly distributed.

[0072] In S340, see Figure 4 , Figure 4 1 is a timing diagram of program operation control provided by an exemplary embodiment of the present application. Figure 4 As shown, when the uniform program of the drum washing machine is finished, it means that the clothes in the drum are evenly distributed; and the weighing program and the uniform program cannot be run at the same time, and the weighing program can only be started after the uniform program is finished. Among them, t is the interval time between the time point when the uniform program is finished and the time point when the weighing program is started. When t=0, it means that the drum washing machine is controlled to start the weighing program immediately after the uniform program is finished. When t>0, it means that the drum washing machine is controlled to start the weighing program immediately after the interval t after the uniform program is finished.

[0073] See also Figure 5 , Figure 5 It is a flowchart of the steps of the weighing program operation provided by an exemplary embodiment of the present application, including the following steps S510-S530.

[0074] S510 controls the drum to increase from the third speed to the fourth speed through the motor, and calculates the increased operating power of the motor;

[0075] S520, controlling the drum to run at a uniform speed at a fourth speed through the motor, and calculating the uniform speed running power of the motor;

[0076] S530, obtaining a weight value of the laundry in the drum based on a difference between the ascending operation power and the uniform speed operation power.

[0077] The following describes these three steps in detail.

[0078] In S510, after the clothes in the drum are evenly distributed through the shaking process, the motor can be controlled to stop running and then stop the drum. When the drum stops working for a preset period of time, the motor controls the drum to accelerate from a stationary state to a fourth speed, and calculates the rising operating power of the motor in this process; in this embodiment, the third speed is 0 revolutions per second, and the third speed is less than the fourth speed. Figure 6 As shown, Figure 6It is a timing diagram for controlling the drum speed operation provided by an exemplary embodiment of the present application. In the figure, v1 represents the first speed, v2 represents the second speed, v3 represents the third speed, v4 represents the fourth speed, and t1 represents the preset time period set for controlling the drum to suspend operation. It should be noted that the figure does not show the specific speed change process of controlling the drum speed from v1 to v2 and from v3 to v4 by the motor. Therefore, the drum speed can be uniformly accelerated from v1 to v2, and uniformly accelerated from v3 to v4; the drum speed can also be non-uniformly accelerated from v1 to v2, and non-uniformly accelerated from v3 to v4.

[0079] In another exemplary embodiment, after the clothes in the drum are evenly distributed through the shaking process, the motor is controlled to reduce the operating power so that the drum can be reduced from the second speed to the third speed. When the drum reaches the third speed, the motor is used to control the drum to run at a constant speed. If the motor runs at the third speed for more than a preset time period, the motor is used to control the drum to accelerate from the third speed to the fourth speed, and the rising operating power of the motor in this process is calculated. In this embodiment, the third speed is less than the second speed and less than the fourth speed. Figure 7 As shown, Figure 7 It is a timing diagram of controlling the drum speed operation provided by another exemplary embodiment of the present application. In the figure, v1, v2, v3 and v4 represent the first speed, the second speed, the third speed and the fourth speed respectively. In this embodiment, there is no need to control the drum speed to zero through the motor, and then accelerate from zero to the fourth speed. It only needs to moderately reduce it to the third speed to start acceleration, thereby effectively saving electric energy. Similarly, the figure does not show the specific speed change process of controlling the drum speed from v1 to v2 and from v3 to v4 through the motor. Therefore, the drum speed can be uniformly accelerated from v1 to v2, and uniformly accelerated from v3 to v4; the drum speed can also be non-uniformly accelerated from v1 to v2, and non-uniformly accelerated from v3 to v4.

[0080] Preferably, the third speed is equal to the second speed, that is, the motor controls the drum to operate at the second speed to achieve uniform distribution of the clothes in the drum, and then directly controls the drum to accelerate from the current speed to the fourth speed through the motor, and calculates the rising operating power of the motor in this process. For example, the fourth speed can be 111 revolutions per second. Figure 8 As shown, Figure 8It is a timing diagram for controlling the drum speed operation provided by another exemplary embodiment of the present application. In the figure, v1, v2, v3 and v4 represent the first speed, the second speed, the third speed and the fourth speed respectively, and v2=v3. In this embodiment, there is no need to reduce the drum speed through motor control, and it can directly accelerate from the second speed to the fourth speed, thereby further saving electric energy. Similarly, the figure does not show the specific speed change process of the drum speed increasing from v1 to v2 and from v3 to v4 through motor control. Therefore, the drum speed can be uniformly accelerated from v1 to v2, and uniformly accelerated from v3 to v4; the drum speed can also be non-uniformly accelerated from v1 to v2, and non-uniformly accelerated from v3 to v4.

[0081] The rising operating power of the motor can be calculated by referring to the calculation method of the operating power of the motor shown above, specifically the following three formulas. Formula 1: rising operating power (W) = rising operating voltage (V) × rising operating current (A); Formula 2: rising operating power (W) = rising operating voltage (V) × rising operating current (A) × power factor; Formula 3: rising operating power (W) = 2π × rising operating speed (rpm) × rising operating torque (N·m).

[0082] In S520, the motor controls the drum to run at a uniform speed at a fourth speed, thereby calculating the uniform speed running power of the motor. Similarly, the uniform speed running power of the motor can also be calculated with reference to the calculation method of the motor running power shown above, specifically the following three formulas. Formula 1: Uniform speed running power (W) = uniform speed running voltage (V) × uniform speed running current (A); Formula 2: Uniform speed running power (W) = uniform speed running voltage (V) × uniform speed running current (A) × power factor; Formula 3: Uniform speed running power (W) = 2π × uniform speed running speed (rpm) × uniform speed running torque (N·m).

[0083] In S530, the difference between the two power values ​​is obtained by subtracting the motor's constant speed running power from the motor's rising running power, and the weight value of the drum underwear is obtained by comparing the difference with the data obtained in the pre-test. Preferably, based on the calculated difference, a more accurate weight value of the drum underwear can be obtained in combination with the influencing parameters.

[0084] It should be noted that the present application has completed a large number of tests in advance, thereby obtaining the relationship between the difference between the motor's rising operating power and the motor's uniform speed operating power and the weight value of the clothing.

[0085] Exemplarily, if the difference between the motor's rising operating power and the motor's uniform operating power is within a first interval, the corresponding weight value of the clothes is a first weight value; if the difference between the motor's rising operating power and the motor's uniform operating power is within a second interval, the corresponding weight value of the clothes is a second weight value.

[0086] Preferably, the ranges of the first interval and the second interval are narrowed to specific values ​​to obtain accurate first values ​​and second values. That is, if the difference between the motor's rising running power and the motor's uniform running power is equal to the first value, the corresponding weight value of the clothes is the first weight value; if the difference between the motor's rising running power and the motor's uniform running power is equal to the second value, the corresponding weight value of the clothes is the second weight value.

[0087] Therefore, after determining the difference, the present application compares it with the data obtained in advance, and can accurately obtain the weight value of the clothes in the drum. By comparing the actual weight value of the clothes in the drum with the measured weight value of the clothes, it can be found that the technical solution used in the present application can reduce the weight value error of the clothes in the drum to within 0.5 kg, which improves the accuracy of motor weighing compared to the current solutions used in the industry.

[0088] In another exemplary embodiment, the control is further configured to perform the following steps:

[0089] Obtaining a number of pre-set weight levels of clothing;

[0090] The corresponding weight level of the clothes is determined based on the weight value of the clothes, and the drum washing machine is controlled to wash the clothes based on the determined weight level of the clothes.

[0091] These two steps are described in detail below.

[0092] According to the weight value of the clothes in the drum, several corresponding weight levels are set in advance. For example, if the clothes in the drum are 0-1 kg, the corresponding weight level is level 1; if the clothes in the drum are 1-2 kg, the corresponding weight level is level 2; if the clothes in the drum are 2-3 kg, the corresponding weight level is level 3. The corresponding weight level is determined according to the weight value of the clothes, and the drum washing machine is controlled to determine the washing parameters according to the weight level of the clothes.

[0093] Washing parameters include but are not limited to washing time, water level and detergent dosage, and can be applied to different stages of the washing process, including the main wash stage, the rinsing stage and the dehydration stage.

[0094] Exemplarily, gear 2 corresponding to the clothing weight gear is taken as the standard gear, and the standard washing time, water level and detergent usage are determined; if the clothing weight gear corresponds to gear 3, the determined washing time is relatively long, the water level is relatively high and the detergent usage is relatively large; if the clothing weight gear corresponds to gear 1, the determined washing time is relatively short, the water level is relatively low and the detergent usage is relatively small.

[0095] By controlling the drum washing machine to wash according to the determined washing parameters, it helps to reduce the consumption of water and electricity, extend the life of the drum washing machine, and improve the washing effect on the clothes in the drum.

[0096] 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.

[0097] It should be understood that the above content is only a preferred exemplary embodiment of the present application and is not intended to limit the implementation scheme of the present application. A person skilled in the art can easily make corresponding changes or modifications based on the main concept and spirit of the present application. Therefore, the scope of protection of the present application shall be based on the scope of protection required by the claims.

Claims

1. A drum washing machine, characterized in that: include: case; a drum disposed in the housing; A motor, used for providing power to drive the drum to work; A water inlet valve, used for controlling water inlet into the drum; A controller is electrically connected to the motor and the water inlet valve, and is configured to perform the following steps: When a weighing instruction for the motor is received, the drum is controlled by the motor to operate at a first speed and the operating power of the motor is calculated; Based on the operating power and a preset power threshold, determining whether the clothes in the drum are in a tangled state; If the determination is yes, the water inlet valve is controlled to be opened, and the drum is controlled by the motor to operate at a second speed so that the clothes in the drum are evenly distributed; Start the weighing program.

2. The drum washing machine according to claim 1, characterized in that: The controller is further configured to perform the following steps: Controlling the drum to increase from the third speed to the fourth speed by the motor, and calculating the increased operating power of the motor; Controlling the drum to run at a uniform speed at a fourth speed by the motor, and calculating the uniform speed running power of the motor; Based on the difference between the rising operation power and the uniform speed operation power, a weight value of the clothes in the drum is obtained.

3. The drum washing machine according to claim 2, characterized in that: The controller is further configured to perform the following steps: Obtaining a number of pre-set weight levels of clothing; The corresponding weight level of the clothes is determined based on the weight value of the clothes, and the drum washing machine is controlled to wash the clothes based on the determined weight level of the clothes.

4. The drum washing machine according to claim 1, characterized in that: The drum washing machine further includes a water level sensor, the controller is connected to the water level sensor, and the controller is further configured to perform the following steps: When a signal indicating that the water level in the drum reaches above a preset water level is received from the water level sensor, the water inlet valve is controlled to be closed.

5. The drum washing machine according to claim 1, characterized in that: The water inlet valve is provided with a water meter; the controller is further configured to perform the following steps: When the water inlet amount of the water inlet valve reaches a preset water inlet amount, the water inlet valve is controlled to be closed.

6. The drum washing machine according to any one of claims 1 to 5, characterized in that: The controller is further configured to perform the following steps: Based on the second rotation speed, the drum is further controlled to operate at a preset rotation angle and / or a preset duration.

7. The drum washing machine according to claim 6, characterized in that: The second rotation speed is between 35 and 60 revolutions per second.

8. The drum washing machine according to claim 6, characterized in that: The preset rotation angle is between 45 degrees and 120 degrees.

9. The drum washing machine according to claim 6, characterized in that: The preset duration is between 20 seconds and 40 seconds.

10. The drum washing machine according to any one of claims 1 to 5, characterized in that: The controller is further configured to perform the following steps: If it is determined that the clothes in the drum are not in a tangled state, the motor controls the drum to operate at the second speed.

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